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University of Ottawa
1.
Wang, Pengfei.
An Approximate MCMC Method for Convex Hulls
.
Degree: 2019, University of Ottawa
URL: http://hdl.handle.net/10393/39529 
► Markov chain Monte Carlo (MCMC) is an extremely popular class of algorithms for computing summaries of posterior distributions. One problem for MCMC in the so-called…
(more)
▼ Markov chain Monte Carlo (MCMC) is an extremely popular class of algorithms for
computing summaries of posterior distributions. One problem for MCMC in the so-called Big Data regime is the growing computational cost of most MCMC algorithms. Most popular and basic MCMC algorithms, like Metropolis-Hastings algorithm (MH) and Gibbs algorithm, have to take the full data set into account in every iteration. In Big Data case, it is a fact that datasets of more than 100 GB are now fairly common. The running time of standard MCMC on such large datasets is prohibitively long.
To solve this problem, some papers develop algorithms that use only a subset of the data at each step to obtain an approximate or exact posterior distribution. Korattikara et al (2013) merely estimates the transition probabilities of a typical MH chain using a subset of the data at each step of the chain, with some controllable error. The FireFly Monte Carlo (FLYMC) algorithm, presented by Maclaurin and Adams, augments the original dataset and only explicitly evaluates an “active" subset in each step. They show that the marginal distribution of the FLYMC algorithm at stationarity in fact still equal to the posterior distribution of interest. However, Both of the above two papers and other literature in this thesis are restrained to a special kind of posteriors with "product-form" likelihoods. Such posteriors require all data points are conditionally independent and under the same likelihood.
However, what problem we want to solve is targeting a uniform distribution on a convex hull. In this case, \product-form" is not applicable. The reason why we focus on this problem is in statistics we sometimes face the problem to compute the volume of distributions which have a convex hull shape or their shape is able to transformed into a convex hull. It is impossible to compute via decomposing and reducing convex hulls of high dimension. According to Barany et al in 1987, the ratio of the estimated upper and lower bound of the volume of a certain convex hull is quite big. It is not possible to estimate the volume well, either. Fast-mixing Markov chains are basically the only way to actually do volume computations.
The initial work in this thesis is to de ne a data-augmentation algorithm along the lines of FLYMC. We also introduce an auxiliary random variable to mark subsets. However, as our situation is more complicated, we also have one more variable to help selecting subsets than FLYMC algorithm. For the extra variable, we utilize pseudo-marginal algorithm (PMMH), which allows us to replace interest parameter's distribution conditional on augmented variable by an estimator. Although our algorithm is not a standard case because our estimator is biased, bounds of the individual approximating measure of the parameter of interest is able to be directly translated into bounds of the error in the stationary measure of the algorithm.
After fi nishing an implementable algorithm, we then use two tricks including Locality
Sensitive Hash function (LSH)…
Subjects/Keywords: MCMC;
convex hull
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APA (6th Edition):
Wang, P. (2019). An Approximate MCMC Method for Convex Hulls
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/39529
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wang, Pengfei. “An Approximate MCMC Method for Convex Hulls
.” 2019. Thesis, University of Ottawa. Accessed January 20, 2021.
http://hdl.handle.net/10393/39529.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang, Pengfei. “An Approximate MCMC Method for Convex Hulls
.” 2019. Web. 20 Jan 2021.
Vancouver:
Wang P. An Approximate MCMC Method for Convex Hulls
. [Internet] [Thesis]. University of Ottawa; 2019. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10393/39529.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang P. An Approximate MCMC Method for Convex Hulls
. [Thesis]. University of Ottawa; 2019. Available from: http://hdl.handle.net/10393/39529
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
2.
Hung, Jung-Ting.
The Hull Numbers of Orientations of Graphs.
Degree: Master, Applied Mathematics, 2006, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623106-173155
► For every pair of vertices u,v in an oriented graph, a u-v geodesic is a shortest directed path from u to v. For an oriented…
(more)
▼ For every pair of vertices u,v in an oriented graph, a u-v
geodesic is a shortest directed path from u to v. For an
oriented graph D, let I
D[u,v] denoted the set of all
vertices lying on a u-v geodesic or a v-u geodesic. And
for Ssubseteq V(D), let I
D[S] denoted the union of all
I
D[u,v] for all u,vin S. If S is a convex set then
I
D[S]=S. Let [S]
D denoted the smallest convex set
containing S. The geodetic νmber g(D) of an oriented
graph D is the minimum cardinality of a set S with
I
D[S]=V(D). The
hull νmber h(D) of an oriented graph
D is the minimum cardinality of a set S with [S]
D=V(D).
For a connected graph G, let g
-(G)=min{g(D):D is an
orientation of G } and g
+(G)=max{g(D):D is an
orientation of G }. And let h
-(G)=min{h(D):D is an
orientation of G } and h
+(G)=max{h(D):D is an
orientation of G }. We show that h
+(G)>h
-(G) and
g
+(G)>g
-(G) for every connected graph G with
|V(G)|geq 3. Then we show that h
+(G)=h
-(G)+1 if and
only if G is isomorphic to K
3 or K
1,r for rgeq 2
and prove that for every connected graph G, h
+(G)geq 5 if
and only if |V(G)|geq 5 and G
cong C
5. Let
Sh
*(G)={h(D):D is a strongly connected orientation of G
} and we have Sh
*(K
n)={2}. Let a graph C(n,t) with
V(C(n,t))={1,2,...,n,x,y} and
E(C(n,t))={i(i+1):i=1,2,...,n-1}cup {1n}cup {1x}cup
{ty}. We also have h
- (C(n,t))<g
-(C(n,t))<h
+(C(n,t))
=g
+(C(n,t)) if n geq 5, t
eq frac{n}{2} and 3leq
tleq n-1. The last result answers a problem of Farrugia in [7].
Advisors/Committee Members: none (chair), none (chair), none (chair), none (chair), Li-Da Tong (committee member).
Subjects/Keywords: hull number
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APA (6th Edition):
Hung, J. (2006). The Hull Numbers of Orientations of Graphs. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623106-173155
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hung, Jung-Ting. “The Hull Numbers of Orientations of Graphs.” 2006. Thesis, NSYSU. Accessed January 20, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623106-173155.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hung, Jung-Ting. “The Hull Numbers of Orientations of Graphs.” 2006. Web. 20 Jan 2021.
Vancouver:
Hung J. The Hull Numbers of Orientations of Graphs. [Internet] [Thesis]. NSYSU; 2006. [cited 2021 Jan 20].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623106-173155.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hung J. The Hull Numbers of Orientations of Graphs. [Thesis]. NSYSU; 2006. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623106-173155
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Victoria University of Wellington
3.
Hopkins, Grant Allan.
Assessment and Management of Risks
from Biofouling.
Degree: 2010, Victoria University of Wellington
URL: http://hdl.handle.net/10063/1405
► Vessel biofouling is a well recognised modern-day pathway for the transfer of nonindigenous species (NIS). However despite awareness of these risks, marine incursions as a…
(more)
▼ Vessel biofouling is a well recognised modern-day pathway for the transfer of nonindigenous
species (NIS). However despite awareness of these risks, marine incursions
as a result of vessel biofouling continue to occur at a growing rate. The objective of this
thesis is to provide underpinning knowledge to improve pre- and post-border
management strategies for vessel biofouling. Chapter 2 provides a baseline assessment
of the biofouling extent and assemblage composition on slow-moving vessels arriving at
New Zealand's border. Slow-movers were targeted because their operational profile is
widely considered to favour the accumulation of extensive biofouling communities (i.e.,
potentially high risk vectors of NIS). Interestingly, this research revealed low fouling
levels and a low incidence of NIS. Highest levels of fouling were observed in areas
where antifouling paint condition was poor or absent (e.g., dry-docking support strips
and niche areas), which is consistent with recent studies of biofouling on other vessel
types. Despite these findings, there have been several documented examples where
heavily fouled slow movers have had high risk NIS on them. As such, risk profiling of
slow-moving vessels is recommended. This should be based on operational
characteristics such as maintenance history, exposure to regions where pest species are
known to be present and intended vessel movements in the recipient region, and should
ideally be undertaken on a case-by-case basis prior to arrival from international or
distant source-regions.
There are limited biofouling risk mitigation options available upon the discovery of NIS
at the border, particularly for large vessels (e.g., barges) or towed structures (e.g., oil
rigs) where removal to land is often not feasible and in-water defouling may be the only
option available. Chapter 3 provides a conceptual framework that identifies biosecurity
benefits and risks posed by in-water defouling. Among the latter are the survivorship of
defouled material, the release of viable propagules via spawning, and enhanced
colonisation of recently defouled surfaces by high risk NIS. Chapter 4 then assesses the
operational performance of two diver-operated defouling tools (rotating brush devices)
that were designed to retain defouled material during operation (i.e., mitigating one of
the main risks associated with in-water defouling identified in Chapter 3). These
devices proved effective in removing low-to-moderate levels of fouling from flat and
curved experimental surfaces. However, performance was generally poorer at removing
more advanced levels of fouling. Furthermore, neither system was capable of retaining
all material defouled; c. 4% was lost to the environment, of which around 20% was
viable. A significant component of material lost comprised fragmented colonial
organisms (e.g., the ascidian Diplosoma sp.), which are theoretically capable of forming
new colonies from fragments. The study also concluded that the defouling brush
devices were not suitable for treating niche areas of vessel…
Advisors/Committee Members: Forrest, Barrie, Gardner, Jonathan.
Subjects/Keywords: Biosecurity; Hull fouling; Slow-movers
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APA (6th Edition):
Hopkins, G. A. (2010). Assessment and Management of Risks
from Biofouling. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1405
Chicago Manual of Style (16th Edition):
Hopkins, Grant Allan. “Assessment and Management of Risks
from Biofouling.” 2010. Doctoral Dissertation, Victoria University of Wellington. Accessed January 20, 2021.
http://hdl.handle.net/10063/1405.
MLA Handbook (7th Edition):
Hopkins, Grant Allan. “Assessment and Management of Risks
from Biofouling.” 2010. Web. 20 Jan 2021.
Vancouver:
Hopkins GA. Assessment and Management of Risks
from Biofouling. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2010. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10063/1405.
Council of Science Editors:
Hopkins GA. Assessment and Management of Risks
from Biofouling. [Doctoral Dissertation]. Victoria University of Wellington; 2010. Available from: http://hdl.handle.net/10063/1405
Brunel University
4.
Karuna, R.
Structural modelling of suspension bridges with particular reference to the humber bridge.
Degree: PhD, 2002, Brunel University
URL: http://bura.brunel.ac.uk/handle/2438/5191
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250172
► The purpose of this research was to investigate the parameters that influence the structural behaviour of a specific suspension bridge, The Humber Bridge. Three finite…
(more)
▼ The purpose of this research was to investigate the parameters that influence the structural behaviour of a specific suspension bridge, The Humber Bridge. Three finite element computer models of increasing complexity were created for the analyses. They were validated against field measurements for both static and dynamic loading, and good correlation was obtained. The programs were used to a) Assess the integrity of the bridge as a whole were three failures of certain individual elements, such as a hanger falling under vehicle impact; b) Determine the influence of the sizing of individual components, such as deck plate thickness or main cable diameter, on overall behaviour; c) ascertain the capability of the structure to cope with loading (traffic, wind orthermal), above the original design values; and d) consider the performance of the bridge had other configurations of hangers been adopted in the original design. From the results of this work, recommendations are made which could influence the future design of long-span suspension bridges.
Subjects/Keywords: 624; Hull
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APA (6th Edition):
Karuna, R. (2002). Structural modelling of suspension bridges with particular reference to the humber bridge. (Doctoral Dissertation). Brunel University. Retrieved from http://bura.brunel.ac.uk/handle/2438/5191 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250172
Chicago Manual of Style (16th Edition):
Karuna, R. “Structural modelling of suspension bridges with particular reference to the humber bridge.” 2002. Doctoral Dissertation, Brunel University. Accessed January 20, 2021.
http://bura.brunel.ac.uk/handle/2438/5191 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250172.
MLA Handbook (7th Edition):
Karuna, R. “Structural modelling of suspension bridges with particular reference to the humber bridge.” 2002. Web. 20 Jan 2021.
Vancouver:
Karuna R. Structural modelling of suspension bridges with particular reference to the humber bridge. [Internet] [Doctoral dissertation]. Brunel University; 2002. [cited 2021 Jan 20].
Available from: http://bura.brunel.ac.uk/handle/2438/5191 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250172.
Council of Science Editors:
Karuna R. Structural modelling of suspension bridges with particular reference to the humber bridge. [Doctoral Dissertation]. Brunel University; 2002. Available from: http://bura.brunel.ac.uk/handle/2438/5191 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250172
Delft University of Technology
5.
Wang, G. (author).
An Equity and Foreign Exchange Heston-Hull-White model for Variable Annuities.
Degree: Master of Applied Mathematics, 2011, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:b8b2276c-aeee-49ed-b9b7-0bc78b794d76
► This project aims to develop and validate the Heston-Hull-White model on Variable Annuities. Such a stochastic modelling assumption is crucial in pricing and hedging the…
(more)
▼ This project aims to develop and validate the Heston-Hull-White model on Variable Annuities. Such a stochastic modelling assumption is crucial in pricing and hedging the long term exotic options. We calibrate the Equity and FX Heston-Hull-White model in the corresponding markets. A novel numerical integration option pricing method-COS method significantly improve this calibration process. From the conditioned calibration, large amounts of scenarios of 6 stock indices and 3 exchange rates are generated based on this hybrid model using Monte Carlo simulations. Finally we compare the Heston-Hull-White model with the Black Scholes model in the scenario-based valuation of the Guaranteed Minimum Withdrawal Benefits to see the impact of the stochastic model.
Master of Applied Mathematics
Mathematics
Electrical Engineering, Mathematics and Computer Science
Advisors/Committee Members: Oosterlee, C.W. (mentor).
Subjects/Keywords: Variable Annuities; Heston Hull White
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APA (6th Edition):
Wang, G. (. (2011). An Equity and Foreign Exchange Heston-Hull-White model for Variable Annuities. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b8b2276c-aeee-49ed-b9b7-0bc78b794d76
Chicago Manual of Style (16th Edition):
Wang, G (author). “An Equity and Foreign Exchange Heston-Hull-White model for Variable Annuities.” 2011. Masters Thesis, Delft University of Technology. Accessed January 20, 2021.
http://resolver.tudelft.nl/uuid:b8b2276c-aeee-49ed-b9b7-0bc78b794d76.
MLA Handbook (7th Edition):
Wang, G (author). “An Equity and Foreign Exchange Heston-Hull-White model for Variable Annuities.” 2011. Web. 20 Jan 2021.
Vancouver:
Wang G(. An Equity and Foreign Exchange Heston-Hull-White model for Variable Annuities. [Internet] [Masters thesis]. Delft University of Technology; 2011. [cited 2021 Jan 20].
Available from: http://resolver.tudelft.nl/uuid:b8b2276c-aeee-49ed-b9b7-0bc78b794d76.
Council of Science Editors:
Wang G(. An Equity and Foreign Exchange Heston-Hull-White model for Variable Annuities. [Masters Thesis]. Delft University of Technology; 2011. Available from: http://resolver.tudelft.nl/uuid:b8b2276c-aeee-49ed-b9b7-0bc78b794d76
Virginia Tech
6.
Li, Jiahui.
Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form.
Degree: MS, Ocean Engineering, 2019, Virginia Tech
URL: http://hdl.handle.net/10919/89904
► The paper presents the first series of results obtained in an ongoing validation and verification study of inter-dynamic OpenFOAM solver framework on a new set…
(more)
▼ The paper presents the first series of results obtained in an ongoing validation and verification study of inter-dynamic OpenFOAM solver framework on a new set of high quality experimental tests performed on a large (2.4m long) generic planing
hull model (GPPH) with high deadrise (18deg), from the pre-planning (Fn∇=2.6) to fully planing (Fn∇=5.7) regimes. This test case is a good benchmark for the free surface capturing model implemented in OpenFOAM which is based on a rather simple transport equation for an additional scalar field that defines the fraction of water in each cell of the computational mesh. This model, in spite of its simplicity, seems capable of reproducing complex violent free surface flows such as that observed in planing hulls, that includes jet spray forming on the bottom and detaching from the chine of the planing
hull and overturning waves off the wet chine region, with some nuances. The dependence of the flow solution on the mesh quality is presented and discussed. Practical indication of the level of uncertainty of CFD models for the prediction of the calm water hydrodynamics of the GPPH is given at the highest simulated speed using both fixed and free attitude simulation solutions. Predictions are then extended to the whole speed range, including resistance components, dynamic trim, heave, wetted chine length, and wetted keel length.The effect due to algorithms is also discussed by modifying the settings in wall functions and solvers for the improvements of future simulation.
Advisors/Committee Members: Brizzolara, Stefano (committeechair), Brown, Alan J. (committee member), Paterson, Eric G. (committee member).
Subjects/Keywords: Planing Hull; GPPH; OpenFOAM; URANS
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APA ·
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APA (6th Edition):
Li, J. (2019). Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/89904
Chicago Manual of Style (16th Edition):
Li, Jiahui. “Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form.” 2019. Masters Thesis, Virginia Tech. Accessed January 20, 2021.
http://hdl.handle.net/10919/89904.
MLA Handbook (7th Edition):
Li, Jiahui. “Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form.” 2019. Web. 20 Jan 2021.
Vancouver:
Li J. Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form. [Internet] [Masters thesis]. Virginia Tech; 2019. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10919/89904.
Council of Science Editors:
Li J. Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form. [Masters Thesis]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/89904
Delft University of Technology
7.
van Lange, Dion (author).
Calibration of FX hybrid model with time-dependent parameters.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:014913ca-61b5-44bc-8bd6-4875963fda2e
► This thesis captures the calibration of a FX hybrid model: The FX Black-Scholes Hull-White model. The main focus is on the calibration of the parameters…
(more)
▼ This thesis captures the calibration of a FX hybrid model: The FX Black-Scholes Hull-White model. The main focus is on the calibration of the parameters in the Hull-White process: The mean reversion and the volatility parameter. The latter is commonly calibrated as a time-dependent parameter, whilst the mean reversion parameter is not. This thesis covers the calibration of the mean reversion as a time-dependent parameter. A known method from the Literature is researched, where we calibrate the mean reversion independently from the volatility parameter to the ratio of two swaptions with the same expiry but different tenor. In our research this method is extended to the negative interest rate environment by assuming that the swap rate follows a shifted lognormal distribution instead of a lognormal distribution. We show that a specific set of swaptions can be chosen, so that the calibration problem is simplified. This choice leads to sequential calibration of convex optimization problems. Numerical results of calibration to artificial and market data are presented, where we compare our method to picking the mean reversion parameter arbitrarily. The findings suggest that the choice of mean reversion parameter affects the calibration procedure. Therefore, we argue that a calibration method for the mean reversion would be appropriate. Besides the focus on the Hull-White process, the calibration of the volatility parameter in the FX Black-Scholes process of the hybrid model is investigated. For the calibration of the FX volatility parameter ATM options on FX rates are used. Numerical results of calibration to artificial and market data are shown. A typical problem of calibration in the industry is discussed: Precision for late maturities. The results in this thesis suggest that this problem could be solved. For research on homogeneity constraints on the time-dependent parameters, the performance of delta-hedging is investigated. The delta-hedging is performed in a simple Black-Scholes world with time-dependent volatility. We show that given a fixed amount hedges beforehand and interest rate zero, there exists an optimal distribution of time points that will lead to equal variance on the profit and loss for every volatility function that has equal implied volatility from t0 to maturity T. Using this strategy, the homogeneity of the volatility parameter has no impact on the performance of delta-hedging. Therefore, in this thesis no homogeneity constraints are used for the calibration of the time-dependent parameters.
Applied Mathematics
Advisors/Committee Members: Grzelak, L.A. (mentor), Oosterlee, C.W. (graduation committee), Fokkink, R.J. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Hull-White model; Hybrid models; Calibration; swaption; Black-Scholes Hull-White; Hull-White; Foreign Exchange market; FX; delta hedging; hedging
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APA (6th Edition):
van Lange, D. (. (2020). Calibration of FX hybrid model with time-dependent parameters. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:014913ca-61b5-44bc-8bd6-4875963fda2e
Chicago Manual of Style (16th Edition):
van Lange, Dion (author). “Calibration of FX hybrid model with time-dependent parameters.” 2020. Masters Thesis, Delft University of Technology. Accessed January 20, 2021.
http://resolver.tudelft.nl/uuid:014913ca-61b5-44bc-8bd6-4875963fda2e.
MLA Handbook (7th Edition):
van Lange, Dion (author). “Calibration of FX hybrid model with time-dependent parameters.” 2020. Web. 20 Jan 2021.
Vancouver:
van Lange D(. Calibration of FX hybrid model with time-dependent parameters. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 20].
Available from: http://resolver.tudelft.nl/uuid:014913ca-61b5-44bc-8bd6-4875963fda2e.
Council of Science Editors:
van Lange D(. Calibration of FX hybrid model with time-dependent parameters. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:014913ca-61b5-44bc-8bd6-4875963fda2e
8.
Demirdjian, Levon.
Some contributions to probabilistic classification with missing data.
Degree: MS, Mathematics, 2013, California State University – Northridge
URL: http://hdl.handle.net/10211.2/3607
► Probabilistic classification is an attempt to categorize observations into distinct groups, or classes. The primary goal of classification is to find a method that has…
(more)
▼ Probabilistic classification is an attempt to categorize observations into distinct groups, or classes. The primary goal of classification is to find a method that has the lowest possible misclassification probability, i.e., rate of incorrect categorization. In practice, the situation is often complicated when data are missing. This research focuses on classifier selection when there are missing covariates in the data and observation being classified.
One of the most widely used nonparametric classification rules is the kernel rule. Here, methods are proposed of selecting smoothing parameters for kernel classifiers in the presence of missing covariates. Exponential performance bounds will be derived for the resulting classifiers. Such bounds, in conjunction with the Borel-Cantelli lemma, provide various strong consistency results.
Next, the form of the optimal classifier is derived when observations are uniformly distributed over convex sets. Given a set of data, the convex
hull of the observations is shown to be a consistent estimator of the convex set in question. When data are missing, however, the form of the optimal classifier changes. The corresponding rule is derived in this setup, and suitable plug in rules are proposed.
Advisors/Committee Members: Mojirsheibani, Majid (advisor), Zakeri, Gholam-ali (committee member).
Subjects/Keywords: convex hull; Dissertations, Academic – CSUN – Mathematics.
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APA (6th Edition):
Demirdjian, L. (2013). Some contributions to probabilistic classification with missing data. (Masters Thesis). California State University – Northridge. Retrieved from http://hdl.handle.net/10211.2/3607
Chicago Manual of Style (16th Edition):
Demirdjian, Levon. “Some contributions to probabilistic classification with missing data.” 2013. Masters Thesis, California State University – Northridge. Accessed January 20, 2021.
http://hdl.handle.net/10211.2/3607.
MLA Handbook (7th Edition):
Demirdjian, Levon. “Some contributions to probabilistic classification with missing data.” 2013. Web. 20 Jan 2021.
Vancouver:
Demirdjian L. Some contributions to probabilistic classification with missing data. [Internet] [Masters thesis]. California State University – Northridge; 2013. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10211.2/3607.
Council of Science Editors:
Demirdjian L. Some contributions to probabilistic classification with missing data. [Masters Thesis]. California State University – Northridge; 2013. Available from: http://hdl.handle.net/10211.2/3607
9.
Thinakaran N.
Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material;.
Degree: Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/29686
► Due to the ever growing demand in textiles synthetic organic dyes newlineare widely used in textile fibers such as cotton silk and polyester More than…
(more)
▼ Due to the ever growing demand in textiles
synthetic organic dyes newlineare widely used in textile fibers
such as cotton silk and polyester More than newline10 000 different
types of dyes and pigments with an annual production of newlinemore
than 0 7 million tons are commercially available and 5 to 10 of the
newlinedye stuff is lost as industrial effluents Untreated disposal
of this coloured newlinewater into the natural water bodies not
only cause damage to aquatic life but newlinealso to human beings
by mutagenic and carcinogenic effect Thus the newlineremoval of
dyes from coloured effluents particularly those from textile
newlineindustries is one of the major environmental concerns
nowadays To newlineminimize the impact of effluents various
techniques such as electro flotation newlinemembrane filtration
reverse osmosis oxidation techniques and ion exchange newlinehave
been employed However, these processes are expensive and cannot be
newlineused to treat a wide range of industrial effluents Among the
advanced chemical or physical treatments adsorption is
newlineconsidered more effective and less expensive than other
techniques Activated newlinecarbon is widely used as an adsorbent
because of its high adsorption capacity newlineto several organic
compounds in wastewater treatments However the cost of
newlineactivated carbons is relatively high thus limiting its usage
As a result many newlinenovel materials have been tested as
adsorbents with two objectives to replace newlineactivated carbon
with inexpensive alternatives and to use various waste
newlineproducts as adsorbents These include mango seed kernel
peanut hull newlinehazelnut shells and jute fibre newline
newline
reference p132-143.
Advisors/Committee Members: Sivanesan S.
Subjects/Keywords: Jute fibre; Peanut hull hazelnut shells
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APA (6th Edition):
N, T. (2014). Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/29686
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
N, Thinakaran. “Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material;.” 2014. Thesis, Anna University. Accessed January 20, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/29686.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
N, Thinakaran. “Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material;.” 2014. Web. 20 Jan 2021.
Vancouver:
N T. Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Jan 20].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/29686.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
N T. Adsorption studies on removal of Anionic dyes from
aqueous solution Using activated carbons prepared From a low cost
material;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/29686
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Yildiz, Hakan.
Computing Volumes and Convex Hulls: Variations and Extensions.
Degree: 2014, University of California – eScholarship, University of California
URL: http://www.escholarship.org/uc/item/67j3p0zv
► Geometric techniques are frequently utilized to analyze and reason about multi-dimensional data. When confronted with large quantities of such data, simplifying geometric statistics or summaries…
(more)
▼ Geometric techniques are frequently utilized to analyze and reason about multi-dimensional data. When confronted with large quantities of such data, simplifying geometric statistics or summaries are often a necessary first step. In this thesis, we make contributions to two such fundamental concepts of computational geometry: Klee's Measure and Convex Hulls. The former is concerned with computing the total volume occupied by a set of overlapping rectangular boxes in d-dimensional space, while the latter is concerned with identifying extreme vertices in a multi-dimensional set of points. Both problems are frequently used to analyze optimal solutions to multi-objective optimization problems: a variant of Klee's problem called the Hypervolume Indicator gives a quantitative measure for the quality of a discrete Pareto Optimal set, while the Convex Hull represents the subset of solutions that are optimal with respect to at least one linear optimization function.In the first part of the thesis, we investigate several practical and natural variations of Klee's Measure Problem. We develop a specialized algorithm for a specific case of Klee's problem called the “grounded” case, which also solves the Hypervolume Indicator problem faster than any earlier solution for certain dimensions. Next, we extend Klee's problem to an uncertainty setting where the existence of the input boxes are defined probabilistically, and study computing the expectation of the volume. Additionally, we develop efficient algorithms for a discrete version of the problem, where the volume of a box is redefined to be the cardinality of its overlap with a given point set.The second part of the thesis investigates the convex hull problem on uncertain input. To this extent, we examine two probabilistic uncertainty models for point sets. The first model incorporates uncertainty in the existence of the input points. The second model extends the first one by incorporating locational uncertainty. For both models, we study the problem of computing the probability that a given point is contained in the convex hull of the uncertain points. We also consider the problem of finding the most likely convex hull, i.e., the mode of the convex hull random variable.
Subjects/Keywords: Computer science; Convex Hull; Klee's Measure; Uncertainty
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APA (6th Edition):
Yildiz, H. (2014). Computing Volumes and Convex Hulls: Variations and Extensions. (Thesis). University of California – eScholarship, University of California. Retrieved from http://www.escholarship.org/uc/item/67j3p0zv
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yildiz, Hakan. “Computing Volumes and Convex Hulls: Variations and Extensions.” 2014. Thesis, University of California – eScholarship, University of California. Accessed January 20, 2021.
http://www.escholarship.org/uc/item/67j3p0zv.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yildiz, Hakan. “Computing Volumes and Convex Hulls: Variations and Extensions.” 2014. Web. 20 Jan 2021.
Vancouver:
Yildiz H. Computing Volumes and Convex Hulls: Variations and Extensions. [Internet] [Thesis]. University of California – eScholarship, University of California; 2014. [cited 2021 Jan 20].
Available from: http://www.escholarship.org/uc/item/67j3p0zv.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yildiz H. Computing Volumes and Convex Hulls: Variations and Extensions. [Thesis]. University of California – eScholarship, University of California; 2014. Available from: http://www.escholarship.org/uc/item/67j3p0zv
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
11.
Lee, Evan Joseph.
Advancements of Stepped Planing Hulls.
Degree: PhD, Aerospace Engineering, 2014, Virginia Tech
URL: http://hdl.handle.net/10919/51123
► The straight line calm water performance of stepped planing hulls has been studied experimentally, by prediction method, and numerically. A model test was conducted to…
(more)
▼ The straight line calm water performance of stepped planing hulls has been studied experimentally, by prediction method, and numerically. A model test was conducted to provide a systematic understanding of the effects that displacement and step location have on the performance of a stepped planing
hull. Ten different step configurations were tested at three different displacements and over a range of four different speeds in calm water. Seven of these configurations were tested at two different Longitudinal Center of Gravity (LCG) locations. Of all the configurations tested, the stepped
hull configurations showed reduced resistance compared to the unstepped
hull. The configurations with the largest step height aft showed the least amount of resistance over the speed range tested. Increasing displacement and shifting LCG had similar effects on craft performance for both stepped and unstepped hulls. The current stepped
hull prediction method was expanded to include a three dimension wave profile and the ability for the stagnation line to cross the step. Using previous model test data and existing two dimension wave profile equations, a single equation was developed to predict the three dimension wave profile aft of a step. Formulations were added to Savitsky's planing prediction method to include very high speed craft and chines dry conditions. Lastly, two simulations were performed using two computational fluid dynamics numerical tools, OpenFOAM, and NFA. The results of these simulations were compared to the experimental test results to assess each code's relative strengths and weaknesses for use in detail design of stepped planing craft.
Advisors/Committee Members: McCue-Weil, Leigh S. (committeechair), Neu, Wayne L. (committee member), Coats, Timothy (committee member), Brown, Alan J. (committee member).
Subjects/Keywords: Stepped Planing Hull; High Speed Craft; Hydrodynamics
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APA ·
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Export
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APA (6th Edition):
Lee, E. J. (2014). Advancements of Stepped Planing Hulls. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/51123
Chicago Manual of Style (16th Edition):
Lee, Evan Joseph. “Advancements of Stepped Planing Hulls.” 2014. Doctoral Dissertation, Virginia Tech. Accessed January 20, 2021.
http://hdl.handle.net/10919/51123.
MLA Handbook (7th Edition):
Lee, Evan Joseph. “Advancements of Stepped Planing Hulls.” 2014. Web. 20 Jan 2021.
Vancouver:
Lee EJ. Advancements of Stepped Planing Hulls. [Internet] [Doctoral dissertation]. Virginia Tech; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10919/51123.
Council of Science Editors:
Lee EJ. Advancements of Stepped Planing Hulls. [Doctoral Dissertation]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/51123
University of Texas – Austin
12.
-7364-0506.
Numerical study of the steady/unsteady multibody interaction in ship propulsion systems.
Degree: PhD, Civil Engineering, 2018, University of Texas – Austin
URL: http://hdl.handle.net/2152/68081
► The goal of this research is to reduce the computational cost of a fully unsteady RANS simulation for the multibody interaction problems in the ship…
(more)
▼ The goal of this research is to reduce the computational cost of a fully unsteady RANS simulation for the multibody interaction problems in the ship propulsion system. To achieve this, the boundary element method (BEM) can be coupled with a RANS solver. The rapid-changing propeller-induced flow is first decoupled from the slow-changing or steady total flow. While RANS can be used to calculate the total flow, BEM is applied to the propeller-induced flow. By representing the propeller blades by a body force field and a mass source field, it becomes possible for RANS to use a larger time step size (or even run as a steady problem) and a smaller number of cells. The use of BEM to handle the propeller-induced flow improves the numerical efficiency and also provides a framework for sheet cavitation predictions.
Depending on the level of simplifications, the coupled BEM/RANS scheme can be implemented by three different approaches: the unsteady approach, the time-averaged non-axisymmetric approach, and the time-averaged axisymmetric approach. All of the three approaches are described in this dissertation, as well as some numerical studies on different body force distribution models, mass source models, effective wake calculation models, etc. Then, the scheme is validated by several simple cases in which the propeller’s interaction with upstream bodies is not considered. Finally, the scheme is applied to a
hull-propeller-rudder interaction problem and a contra-rotating propeller problem.
Advisors/Committee Members: Kinnas, Spyros A. (advisor), Passalacqua, Paola (committee member), Liljestrand, Howard M (committee member), Bogard, David G (committee member), Raja, Laxminarayan L (committee member).
Subjects/Keywords: Propeller hydrodynamics; BEM/RANS; Hull propeller interaction
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APA ·
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APA (6th Edition):
-7364-0506. (2018). Numerical study of the steady/unsteady multibody interaction in ship propulsion systems. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/68081
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-7364-0506. “Numerical study of the steady/unsteady multibody interaction in ship propulsion systems.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed January 20, 2021.
http://hdl.handle.net/2152/68081.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-7364-0506. “Numerical study of the steady/unsteady multibody interaction in ship propulsion systems.” 2018. Web. 20 Jan 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-7364-0506. Numerical study of the steady/unsteady multibody interaction in ship propulsion systems. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/2152/68081.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-7364-0506. Numerical study of the steady/unsteady multibody interaction in ship propulsion systems. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://hdl.handle.net/2152/68081
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
University of New South Wales
13.
Gangemi, Peter.
Attenuation of the structural and acoustic responses of a submerged hull.
Degree: Mechanical & Manufacturing Engineering, 2015, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/54628
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:35415/SOURCE02?view=true
► As the only true covert naval option, Submarines are in constant demand around the world. Reducing the structure borne noise from the hull is one…
(more)
▼ As the only true covert naval option, Submarines are in constant demand around the world. Reducing the structure borne noise from the
hull is one of the highest priorities associated with Submarine design. The major sources of underwater noise from maritime vessels include onboard machinery, wake from the propeller, flow of fluid over the
hull and excitation of the global
hull resonances. At low frequencies, rotation of the propeller results in discrete tones at the blade passing frequency and its harmonics. The fluctuating forces at the propeller are transmitted through the propulsion system, resulting in excitation of the low frequency
hull vibrational modes, which in turn results in a high level of structure-borne radiated noise. In this thesis, the low frequency vibro-acoustic responses from a submerged
hull are determined and then attenuated using control strategies. Analytical and computational models of the submarine are created, allowing the structural responses of the
hull and the far field acoustic responses to be obtained. The submarine
hull is represented by a thin walled cylindrical shell, with additional complicating effects including ring-stiffeners, bulkheads, external fluid loading and ballast tanks. Novel control methods are utilised to attenuate the structural response of the submerged
hull. Passive tuned vibration absorbers, active vibration control, hybrid vibration absorbers and compliant coatings are used to attenuate the breathing and higher order modes of the submerged
hull. Attenuation of the higher order
hull modes by active and hybrid means has rarely been examined. To the best of the author’s knowledge, the use of compliant coatings in conjunction with active or hybrid technologies has never been investigated. This thesis fills these gaps in the research. The highest level of attenuation is achieved from the use of the hybrid and coating technologies. The hybrid vibration absorbers provide greater attenuation than the passive control with a lower control force requirement than the active treatment. The acoustic coatings provide significant attenuation at the anti resonances. This thesis shows that passive, active, hybrid and coating treatments reduce the structural and acoustic responses of the submerged
hull.
Advisors/Committee Members: Kanapathipillai, Kana, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Hull; Submarine; Submerged; Control; Vibration; Acoustics
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APA (6th Edition):
Gangemi, P. (2015). Attenuation of the structural and acoustic responses of a submerged hull. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/54628 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:35415/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Gangemi, Peter. “Attenuation of the structural and acoustic responses of a submerged hull.” 2015. Doctoral Dissertation, University of New South Wales. Accessed January 20, 2021.
http://handle.unsw.edu.au/1959.4/54628 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:35415/SOURCE02?view=true.
MLA Handbook (7th Edition):
Gangemi, Peter. “Attenuation of the structural and acoustic responses of a submerged hull.” 2015. Web. 20 Jan 2021.
Vancouver:
Gangemi P. Attenuation of the structural and acoustic responses of a submerged hull. [Internet] [Doctoral dissertation]. University of New South Wales; 2015. [cited 2021 Jan 20].
Available from: http://handle.unsw.edu.au/1959.4/54628 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:35415/SOURCE02?view=true.
Council of Science Editors:
Gangemi P. Attenuation of the structural and acoustic responses of a submerged hull. [Doctoral Dissertation]. University of New South Wales; 2015. Available from: http://handle.unsw.edu.au/1959.4/54628 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:35415/SOURCE02?view=true
14.
Huckaby, Chad A.
Observations on Convexity.
Degree: MS- Mathematical Sciences, Mathematics and Statistics, 2017, Stephen F. Austin State University
URL: https://scholarworks.sfasu.edu/etds/88
► This thesis will explore convexity as it pertains to sets of complex-valued functions. These include preliminary looks at established linear and polynomially convex hulls,…
(more)
▼ This thesis will explore convexity as it pertains to sets of complex-valued functions. These include preliminary looks at established linear and polynomially convex hulls, along with the development of new types of convex hulls. These types will include, but are not limited to the hulls determined by inversions, shift inversions, and Mobius transformations. A convex
hull must be preceded by the set of functions involved. These hulls are the smallest convex sets that contain the original set. Justifications and precise definitions are included within the body of the work.
Advisors/Committee Members: Roy Joseph Harris, Sarah Triana Stovall, Clint Richardson.
Subjects/Keywords: complex analysis; functional convexity; convex hull; Analysis
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APA (6th Edition):
Huckaby, C. A. (2017). Observations on Convexity. (Masters Thesis). Stephen F. Austin State University. Retrieved from https://scholarworks.sfasu.edu/etds/88
Chicago Manual of Style (16th Edition):
Huckaby, Chad A. “Observations on Convexity.” 2017. Masters Thesis, Stephen F. Austin State University. Accessed January 20, 2021.
https://scholarworks.sfasu.edu/etds/88.
MLA Handbook (7th Edition):
Huckaby, Chad A. “Observations on Convexity.” 2017. Web. 20 Jan 2021.
Vancouver:
Huckaby CA. Observations on Convexity. [Internet] [Masters thesis]. Stephen F. Austin State University; 2017. [cited 2021 Jan 20].
Available from: https://scholarworks.sfasu.edu/etds/88.
Council of Science Editors:
Huckaby CA. Observations on Convexity. [Masters Thesis]. Stephen F. Austin State University; 2017. Available from: https://scholarworks.sfasu.edu/etds/88
Delft University of Technology
15.
Casella, S.G. (author).
Surrogate Based Optimisation for hull shapes with DAKOTA toolkit.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:d64dd2c8-4b3e-438f-aeba-2eb3c7cce568
► The thesis proposes a methodology for a Surrogate Based Optimisation (SBO) study and its application in the Naval Architecture field using the open-source software DAKOTA.…
(more)
▼ The thesis proposes a methodology for a Surrogate Based Optimisation (SBO) study and its application in the Naval Architecture field using the open-source software DAKOTA. Surrogate Based Optimisation is a useful and powerful way of reducing time and costs in hull shape optimisation. It allows the employ of exploratory data analysis techniques and machine learning methods to get more insight, discover hidden patterns, and detect anomalies in the design space. However, an SBO consists of several interconnected steps, and each increases complexity and uncertainty to the overall process. The main goal is the investigation of the effects of different surrogate models on ship geometry optimisation from a resistance point of view. Also, different sampling plans, infill techniques, and optimisation algorithms are analysed and compared, as elemental steps for an SBO. This is done by the use of test functions that emulate the problem of ship optimisation. Furthermore, the intent is to try and list general guidelines to follow when building up an SBO routine with CFD simulations involved, with a focus in the marine field. This research led to the assembly of Halton sampling sequence, Kriging meta-model, Expected Improvement function, Genetic Algorithms, and Pattern Search tools to implement a working SBO routine. This routine is used to demonstrate the success of the SBO method for a Hull Vane and an aft ship optimisations. Moreover, it is used to validate the research outcomes of this thesis and to prove that this work can be safely used for every-day commercial work. The two design applications provided a resistance reduction, with respect to a benchmark hull, of about 19% and 7%. Thus not only they were successful, but also they were excellent examples to show how a surrogate model and its correct visualisation can give the Naval Architect the right tools to critically analyse the results, gain more understanding on the problem, spot and correct anomalies, and provide creative solutions to a client.
Marine Technology | Ship Hydromechanics
Advisors/Committee Members: Akkerman, I. (mentor), Jacobs, Vincent (mentor), Westerweel, J. (graduation committee), Hekkenberg, R.G. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Surrogate-based optimization; dakota; Hull shapes; Hull Vane; kriging; genetic algorithm; resistance reduction; sbo
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APA ·
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APA (6th Edition):
Casella, S. G. (. (2020). Surrogate Based Optimisation for hull shapes with DAKOTA toolkit. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d64dd2c8-4b3e-438f-aeba-2eb3c7cce568
Chicago Manual of Style (16th Edition):
Casella, S G (author). “Surrogate Based Optimisation for hull shapes with DAKOTA toolkit.” 2020. Masters Thesis, Delft University of Technology. Accessed January 20, 2021.
http://resolver.tudelft.nl/uuid:d64dd2c8-4b3e-438f-aeba-2eb3c7cce568.
MLA Handbook (7th Edition):
Casella, S G (author). “Surrogate Based Optimisation for hull shapes with DAKOTA toolkit.” 2020. Web. 20 Jan 2021.
Vancouver:
Casella SG(. Surrogate Based Optimisation for hull shapes with DAKOTA toolkit. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 20].
Available from: http://resolver.tudelft.nl/uuid:d64dd2c8-4b3e-438f-aeba-2eb3c7cce568.
Council of Science Editors:
Casella SG(. Surrogate Based Optimisation for hull shapes with DAKOTA toolkit. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:d64dd2c8-4b3e-438f-aeba-2eb3c7cce568
Technical University of Lisbon
16.
Nóbrega, Ísis Patrícia Cardoso.
Efeitos do biochar nas propriedades físicas e químicas do solo: sequestro de carbono no solo.
Degree: 2011, Technical University of Lisbon
URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4104
► Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
The objective of this master thesis was to evaluate the effect of biochar on CO2…
(more)
▼ Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
The objective of this master thesis was to evaluate the effect of biochar on CO2 emissions from agricultural soil. The biochars were produced from three different feedstocks (clean pine chips, peanut hull and poultry manure) and at two different slow pyrolysis temperatures (400 ºC and 500 ºC).
Biochar properties were significantly influenced by the feedstock and pyrolysis conditions. The biochar yield was higher at lower pyrolysis temperature.
In general, biochar produced from woody plants had higher carbon (C) content, low nitrogen (N) content and low cation exchange capacity (CEC). Biochar produced from manure has low C content, high N content and CEC. The pH of these biochars ranged from neutral to alkaline.
To examine the effects of biochar on soil GHG production, an incubation experiment was performed. The emissions of CO2 in soils with biochar were evaluated through C mineralization. The biochar produced at 400 ºC by using peanut hull and poultry manure had a higher CO2 emission compared to that obtained at 500 ºC from raw materials.
The C mineralization was strongly controlled by the pyrolysis temperature than by the feedstock type.
Advisors/Committee Members: Cordovil, Cláudia Marques dos Santos.
Subjects/Keywords: biochar; pyrolysis; clean pine chips; peanut hull; poultry manure; incubation
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APA (6th Edition):
Nóbrega, . P. C. (2011). Efeitos do biochar nas propriedades físicas e químicas do solo: sequestro de carbono no solo. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4104
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nóbrega, Ísis Patrícia Cardoso. “Efeitos do biochar nas propriedades físicas e químicas do solo: sequestro de carbono no solo.” 2011. Thesis, Technical University of Lisbon. Accessed January 20, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4104.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nóbrega, Ísis Patrícia Cardoso. “Efeitos do biochar nas propriedades físicas e químicas do solo: sequestro de carbono no solo.” 2011. Web. 20 Jan 2021.
Vancouver:
Nóbrega PC. Efeitos do biochar nas propriedades físicas e químicas do solo: sequestro de carbono no solo. [Internet] [Thesis]. Technical University of Lisbon; 2011. [cited 2021 Jan 20].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4104.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nóbrega PC. Efeitos do biochar nas propriedades físicas e químicas do solo: sequestro de carbono no solo. [Thesis]. Technical University of Lisbon; 2011. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/4104
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
17.
CARVALHO, César Augusto Mendonça de.
Segmentação de sentenças manuscritas através de redes neurais artificiais
.
Degree: 2008, Universidade Federal de Pernambuco
URL: http://repositorio.ufpe.br/handle/123456789/1538
► O reconhecimento automático de textos manuscritos vem a cada dia ganhando importância tanto no meio científico quanto no comercial. Como exemplos de aplicações, têm-se sistemas…
(more)
▼ O reconhecimento automático de textos manuscritos vem a cada dia ganhando importância
tanto no meio científico quanto no comercial. Como exemplos de aplicações, têm-se sistemas
bancários onde os campos de valor dos cheques são validados, aplicativos presentes nos correios
para leitura de endereço e código postal, e sistemas de indexação de documentos históricos.
A segmentação automática do texto em palavras ou caracteres é um dos primeiros passos
realizados pelos sistemas de reconhecimento dos textos manuscritos. Portanto, é essencial que
seja alcançado um bom desempenho de segmentação para que as etapas posteriores produzam
boas taxas de reconhecimento do texto manuscrito.
O presente trabalho trata do problema de segmentação de sentenças manuscritas em palavras
através de duas abordagens: (i) método baseado na métrica de distância Convex
Hull com modificações
que objetivam melhorar o desempenho de segmentação; (ii) um novo método baseado
em Redes Neurais Artificiais que visa superar problemas existentes em outras técnicas de segmentação,
tais como: o uso de heurísticas e limitação de vocabulário.
O desempenho dos métodos de segmentação foi avaliado utilizando-se de uma base de
dados pública de texto manuscrito. Os resultados experimentais mostram que houve melhora de
desempenho das abordagens quando comparadas à abordagem tradicional baseada em distância
Convex
Hull
Advisors/Committee Members: CAVALCANTI, George Darmiton da Cunha (advisor).
Subjects/Keywords: Redes Neurais Artificiais;
Convex Hull;
Segmentação automática de texto manuscrito
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APA (6th Edition):
CARVALHO, C. A. M. d. (2008). Segmentação de sentenças manuscritas através de redes neurais artificiais
. (Thesis). Universidade Federal de Pernambuco. Retrieved from http://repositorio.ufpe.br/handle/123456789/1538
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
CARVALHO, César Augusto Mendonça de. “Segmentação de sentenças manuscritas através de redes neurais artificiais
.” 2008. Thesis, Universidade Federal de Pernambuco. Accessed January 20, 2021.
http://repositorio.ufpe.br/handle/123456789/1538.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
CARVALHO, César Augusto Mendonça de. “Segmentação de sentenças manuscritas através de redes neurais artificiais
.” 2008. Web. 20 Jan 2021.
Vancouver:
CARVALHO CAMd. Segmentação de sentenças manuscritas através de redes neurais artificiais
. [Internet] [Thesis]. Universidade Federal de Pernambuco; 2008. [cited 2021 Jan 20].
Available from: http://repositorio.ufpe.br/handle/123456789/1538.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
CARVALHO CAMd. Segmentação de sentenças manuscritas através de redes neurais artificiais
. [Thesis]. Universidade Federal de Pernambuco; 2008. Available from: http://repositorio.ufpe.br/handle/123456789/1538
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Franquetto, Paulo Rogério.
Avaliação da influência da tensão residual na instabilidade de cascos resistentes de submarinos.
Degree: Mestrado, Tecnologia Nuclear - Reatores, 2015, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/85/85133/tde-09102015-083653/
;
► Na construção de cascos resistentes de submarinos são utilizados, frequentemente, os processos de conformação a frio e de soldagem. Estes processos produzem na estrutura deformações…
(more)
▼ Na construção de cascos resistentes de submarinos são utilizados, frequentemente, os processos de conformação a frio e de soldagem. Estes processos produzem na estrutura deformações plásticas permanentes originando tensões residuais. A presença das tensões residuais é equivalente a introduzir uma pré-carga inicial na estrutura, o que acelera o processo de plastificação, reduzindo à capacidade de resistência da estrutura à pressão hidrostática. Para quantificar esta redução foi realizado, inicialmente, um estudo considerando a presença das tensões residuais devido à conformação a frio das chapas do casco e do flange das cavernas, para submarinos com 6, 8 e 10 m de diâmetro, em aço HY100. Para isso, um modelo não-linear foi produzido considerando não-linearidades geométricas e de material. Complementarmente, também foi estudada a influência de perfis de tensões residuais definidos a partir de resultados experimentais na redução da pressão de colapso do casco resistente do submarino espanhol S-80. Estes perfis consideram a presença simultânea de tensões residuais de conformação e de soldagem. Em todos os modelos estudados, as tensões residuais foram introduzidas no modelo numérico utilizando o comando INISTATE disponível no software comercial Ansys. Este comando é frequentemente utilizado na literatura em modelos numéricos envolvendo tensões residuais e foi validado utilizando três modelos de referência disponíveis na literatura. Ao final, pôde-se verificar que a presença das tensões residuais acelera a plastificação do casco resistente e reduz a pressão de colapso em até 5%, sendo a tensão residual de conformação a que mais contribuí nesta redução. De qualquer forma, pôde-se concluir que a influência das tensões residuais é pequena quando comparada com a pressão de colapso obtida para cada casco resistente analisado.
During the manufacturing of submarine pressure hull are often applied processes like cold forming and welding. Those processes lead to permanent plastic deformations which are associated with residual stresses. The presence of residual stresses is equivalent to the introduction of an initial pre-load in the structure, which accelerates the plastification process, decreasing hull pressure resistance. To quantify this reduction, a case study that considers residual stresses due to cold forming on hull and flange plates has been performed. The study encompasses hull diameters of 6, 8 and 10 m, made of HY100 steel. A nonlinear model has been done, considering material and geometric non-linearity. Complementarily, the influence of experimental residual stresses profiles on the reduction of collapse pressure of the Spanish S-80 submarine has been studied. These profiles consider the simultaneous presence of residual stresses due to cold forming and welding. In all studied models, the residual stresses have been introduced in the numerical models through INISTATE Ansys software command. This command has been validated using three reference models available in open source literature. In the end, it has been…
Advisors/Committee Members: Mattar Neto, Miguel.
Subjects/Keywords: buckling; casco resistente; flambagem; pressure hull; residual stress; tensão residual
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APA (6th Edition):
Franquetto, P. R. (2015). Avaliação da influência da tensão residual na instabilidade de cascos resistentes de submarinos. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/85/85133/tde-09102015-083653/ ;
Chicago Manual of Style (16th Edition):
Franquetto, Paulo Rogério. “Avaliação da influência da tensão residual na instabilidade de cascos resistentes de submarinos.” 2015. Masters Thesis, University of São Paulo. Accessed January 20, 2021.
http://www.teses.usp.br/teses/disponiveis/85/85133/tde-09102015-083653/ ;.
MLA Handbook (7th Edition):
Franquetto, Paulo Rogério. “Avaliação da influência da tensão residual na instabilidade de cascos resistentes de submarinos.” 2015. Web. 20 Jan 2021.
Vancouver:
Franquetto PR. Avaliação da influência da tensão residual na instabilidade de cascos resistentes de submarinos. [Internet] [Masters thesis]. University of São Paulo; 2015. [cited 2021 Jan 20].
Available from: http://www.teses.usp.br/teses/disponiveis/85/85133/tde-09102015-083653/ ;.
Council of Science Editors:
Franquetto PR. Avaliação da influência da tensão residual na instabilidade de cascos resistentes de submarinos. [Masters Thesis]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/85/85133/tde-09102015-083653/ ;
University of Alberta
19.
Sarkar, Suparna.
Extraction of Carbohydrates and Phenolics from Barley Hull
using Pressurized/Subcritical Fluids.
Degree: MS, Department of Agricultural, Food, and Nutritional
Science, 2013, University of Alberta
URL: https://era.library.ualberta.ca/files/x920fw94n
► Canada is one of the largest barley producers, generating barley hull which accounts for 10-13% wt of the grain. Barley hull has valuable components, such…
(more)
▼ Canada is one of the largest barley producers,
generating barley hull which accounts for 10-13% wt of the grain.
Barley hull has valuable components, such as carbohydrates and
phenolics. This thesis studied the extraction of total
carbohydrates and phenolics from the hull of a new barley variety
(BT 584) using solid-liquid batch (SLB), subcritical fluid (sCF)
and supercritical CO2 (SC-CO2) extraction methods. The optimization
of the variables was performed using response surface methodology
(RSM) with a central composite design. The sCF extraction was the
most effective method, yielding 122.4 mg of total phenolics/g of
barley hull and 589.4 mg of total carbohydrates/g of barley hull at
240°C, 15MPa, with 12% ethanol concentration, flowing at 5 mL/min.
A kinetic model was used to fit the curves of the sCF extraction
with mean square error lower than 0.06.
Subjects/Keywords: barley hull; pressurized fluids; supercritical CO2; extraction; Total phenolics; total carbohydrates
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APA ·
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APA (6th Edition):
Sarkar, S. (2013). Extraction of Carbohydrates and Phenolics from Barley Hull
using Pressurized/Subcritical Fluids. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/x920fw94n
Chicago Manual of Style (16th Edition):
Sarkar, Suparna. “Extraction of Carbohydrates and Phenolics from Barley Hull
using Pressurized/Subcritical Fluids.” 2013. Masters Thesis, University of Alberta. Accessed January 20, 2021.
https://era.library.ualberta.ca/files/x920fw94n.
MLA Handbook (7th Edition):
Sarkar, Suparna. “Extraction of Carbohydrates and Phenolics from Barley Hull
using Pressurized/Subcritical Fluids.” 2013. Web. 20 Jan 2021.
Vancouver:
Sarkar S. Extraction of Carbohydrates and Phenolics from Barley Hull
using Pressurized/Subcritical Fluids. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2021 Jan 20].
Available from: https://era.library.ualberta.ca/files/x920fw94n.
Council of Science Editors:
Sarkar S. Extraction of Carbohydrates and Phenolics from Barley Hull
using Pressurized/Subcritical Fluids. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/x920fw94n
20.
Pinto, Wagner Mespaque.
Monitoramento de deformações e deslocamentos relativos nas estruturas de suporte de plantas de processo modulares em unidades flutuantes de produção de petróleo do tipo FPSO.
Degree: 2010, Universidade Federal do Rio Grande
URL: http://repositorio.furg.br/handle/1/3439
► Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Engenharia Oceânica, Escola de Engenharia, 2010.
Os projetos mais recentes de plataformas do tipo…
(more)
▼ Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Engenharia Oceânica, Escola de Engenharia, 2010.
Os projetos mais recentes de plataformas do tipo FPSO da PETROBRAS utilizam plantas
modulares sobre cascos convertidos de mais de 300m de comprimento. Os módulos podem
atingir 2.000t (peso seco) e mais de 3.000t em operação, sendo suportados em quatro pontos por estruturas chamadas stools. No projeto da P-53, para cada módulo há dois stools deslizantes (os quais permitem deslocamentos longitudinais, paralelos ao eixo da embarcação), e dois fixos (com restrição de movimentos em todas as direções), cada par em transversais distintas. Teoricamente, os stools deslizantes são empregados para evitar que os
efeitos das deflexões do casco da plataforma induzam esforços nas estruturas dos módulos. As dúvidas a respeito da eficiência deste mecanismo para essa configuração de suportação de módulos motivaram a realização deste trabalho, cujo objetivo é analisar e compreender o comportamento estrutural dos apoios dos módulos (stools) da plataforma P-53. Para se obter estas respostas, foi desenvolvido um projeto de pesquisa na FURG com apoio da PETROBRAS, o qual mobilizou três pesquisadores e dez bolsistas, durante 3 anos e meio. Um sistema de aquisição de dados foi especialmente implementado, e através deste foram monitoradas deformações e deslocamentos relativos sobre esses stools. No total foram instalados na plataforma 75 sensores (entre extensômetros, transdutores de deslocamento e acelerômetros). Foram realizadas medições durante o assentamento dos módulos sobre a
embarcação ainda no estaleiro, e na locação final, submetida às condições ambientais da
Bacia de Campos. Nas condições em que foi realizado o monitoramento, não foram
registrados deslocamentos relativos entre os stools deslizantes e os pés dos módulos durante todo o período de observação. A não ocorrência de deslizamento pode ser justificada pelo elevado peso dos módulos, alto coeficiente de atrito, e as características das ondas sob as quais a embarcação foi submetida. Nestas condições, a ocorrência de deslocamentos relativos
é mais provável para módulos mais leves, e improvável, ou até impossível, para módulos mais pesados. Mesmo assim não foram registrados níveis de deformações que pudessem indicar um incremento relevante de carga sobre as estruturas dos stools e dos módulos.
The most recent PETROBRAS FPSO projects used modular process plants on converted vessels with more than 300m length. The modules may reach 2,000t (dry) and more than 3,000t on operation, being supported by four points on structures called stools. In the P-53 design, there are two sliding stools (that allow longitudinal displacements, parallel to vessel axis), and two fixed stools (that restrict the displacement in all directions), each pair is at different transversal frames on the hull. In theory, the sliding stools are employed to avoid that the hull deflections induce deformation on the module’s structures. The doubts about the efficiency of this…
Advisors/Committee Members: Teixeira, Paulo Roberto de Freitas.
Subjects/Keywords: FPSO; FPU; Stool; Interação casco módulos; Hull topside iterface
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APA (6th Edition):
Pinto, W. M. (2010). Monitoramento de deformações e deslocamentos relativos nas estruturas de suporte de plantas de processo modulares em unidades flutuantes de produção de petróleo do tipo FPSO. (Masters Thesis). Universidade Federal do Rio Grande. Retrieved from http://repositorio.furg.br/handle/1/3439
Chicago Manual of Style (16th Edition):
Pinto, Wagner Mespaque. “Monitoramento de deformações e deslocamentos relativos nas estruturas de suporte de plantas de processo modulares em unidades flutuantes de produção de petróleo do tipo FPSO.” 2010. Masters Thesis, Universidade Federal do Rio Grande. Accessed January 20, 2021.
http://repositorio.furg.br/handle/1/3439.
MLA Handbook (7th Edition):
Pinto, Wagner Mespaque. “Monitoramento de deformações e deslocamentos relativos nas estruturas de suporte de plantas de processo modulares em unidades flutuantes de produção de petróleo do tipo FPSO.” 2010. Web. 20 Jan 2021.
Vancouver:
Pinto WM. Monitoramento de deformações e deslocamentos relativos nas estruturas de suporte de plantas de processo modulares em unidades flutuantes de produção de petróleo do tipo FPSO. [Internet] [Masters thesis]. Universidade Federal do Rio Grande; 2010. [cited 2021 Jan 20].
Available from: http://repositorio.furg.br/handle/1/3439.
Council of Science Editors:
Pinto WM. Monitoramento de deformações e deslocamentos relativos nas estruturas de suporte de plantas de processo modulares em unidades flutuantes de produção de petróleo do tipo FPSO. [Masters Thesis]. Universidade Federal do Rio Grande; 2010. Available from: http://repositorio.furg.br/handle/1/3439
Clemson University
21.
Masoudi, Nafiseh.
Geometric-based Optimization Algorithms for Cable Routing and Branching in Cluttered Environments.
Degree: PhD, Mechanical Engineering, 2020, Clemson University
URL: https://tigerprints.clemson.edu/all_dissertations/2702
► The need for designing lighter and more compact systems often leaves limited space for planning routes for the connectors that enable interactions among the…
(more)
▼ The need for designing lighter and more compact systems often leaves limited space for planning routes for the connectors that enable interactions among the system’s components. Finding optimal routes for these connectors in a densely populated environment left behind at the detail design stage has been a challenging problem for decades.
A variety of deterministic as well as heuristic methods has been developed to address different instances of this problem. While the focus of the deterministic methods is primarily on the optimality of the final solution, the heuristics offer acceptable solutions, especially for such problems, in a reasonable amount of time without guaranteeing to find optimal solutions. This study is an attempt to furthering the efforts in deterministic optimization methods to tackle the routing problem in two and three dimensions by focusing on the optimality of final solutions.
The objective of this research is twofold. First, a mathematical framework is proposed for the optimization of the layout of wiring connectors in planar cluttered environments. The problem looks at finding the optimal tree network that spans multiple components to be connected with the aim of minimizing the overall length of the connectors while maximizing their common length (for maintainability and traceability of connectors). The optimization problem is formulated as a bi-objective problem and two solution methods are proposed: (1) to solve for the optimal locations of a known number of breakouts (where the connectors branch out) using mixed-binary optimization and visibility notion and (2) to find the minimum length tree that spans multiple components of the system and generates the optimal layout using the previously-developed convex
hull based routing. The computational performance of these methods in solving a variety of problems is further evaluated.
Second, the problem of finding the shortest route connecting two given nodes in a 3D cluttered environment is considered and addressed through deterministically generating a graphical representation of the collision-free space and searching for the shortest path on the found graph. The method is tested on sample workspaces with scattered convex polyhedra and its computational performance is evaluated. The work demonstrates the NP-hardness aspect of the problem which becomes quickly intractable as added components or increase in facets are considered.
Advisors/Committee Members: Georges Fadel, Margaret Wiecek, Joshua Summers, Cameron Turner, Jonathan Cagan.
Subjects/Keywords: computer-aided design; convex hull; engineering design; graph; optimization; path planning
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APA ·
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Manager
APA (6th Edition):
Masoudi, N. (2020). Geometric-based Optimization Algorithms for Cable Routing and Branching in Cluttered Environments. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/2702
Chicago Manual of Style (16th Edition):
Masoudi, Nafiseh. “Geometric-based Optimization Algorithms for Cable Routing and Branching in Cluttered Environments.” 2020. Doctoral Dissertation, Clemson University. Accessed January 20, 2021.
https://tigerprints.clemson.edu/all_dissertations/2702.
MLA Handbook (7th Edition):
Masoudi, Nafiseh. “Geometric-based Optimization Algorithms for Cable Routing and Branching in Cluttered Environments.” 2020. Web. 20 Jan 2021.
Vancouver:
Masoudi N. Geometric-based Optimization Algorithms for Cable Routing and Branching in Cluttered Environments. [Internet] [Doctoral dissertation]. Clemson University; 2020. [cited 2021 Jan 20].
Available from: https://tigerprints.clemson.edu/all_dissertations/2702.
Council of Science Editors:
Masoudi N. Geometric-based Optimization Algorithms for Cable Routing and Branching in Cluttered Environments. [Doctoral Dissertation]. Clemson University; 2020. Available from: https://tigerprints.clemson.edu/all_dissertations/2702
22.
Balaji, R.
Preparation and characterization of electrodeposits from
methane Sulphonic acid bath; -.
Degree: Chemistry, 2006, Bharathidasan University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/4820
Subjects/Keywords: Electrodeposition; Electrode kinetics; Hull Cell
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APA ·
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Manager
APA (6th Edition):
Balaji, R. (2006). Preparation and characterization of electrodeposits from
methane Sulphonic acid bath; -. (Thesis). Bharathidasan University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/4820
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Balaji, R. “Preparation and characterization of electrodeposits from
methane Sulphonic acid bath; -.” 2006. Thesis, Bharathidasan University. Accessed January 20, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/4820.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Balaji, R. “Preparation and characterization of electrodeposits from
methane Sulphonic acid bath; -.” 2006. Web. 20 Jan 2021.
Vancouver:
Balaji R. Preparation and characterization of electrodeposits from
methane Sulphonic acid bath; -. [Internet] [Thesis]. Bharathidasan University; 2006. [cited 2021 Jan 20].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/4820.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Balaji R. Preparation and characterization of electrodeposits from
methane Sulphonic acid bath; -. [Thesis]. Bharathidasan University; 2006. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/4820
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
23.
Jiles, Allura Marie.
Rice Hull Silica, A Silicon Carbide Precursor For Collagen, Lignin And Silicon Metal Powder Bindered Anthracite Briquettes.
Degree: 2013, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/19077
► Foundry coke is currently the primary energy source of U.S. iron foundries employing cupolas to produce iron. The availability, cost and environmental impact of this…
(more)
▼ Foundry coke is currently the primary energy source of U.S. iron foundries employing cupolas to produce iron. The availability, cost and environmental impact of this fuel usage limit the production of iron. The replacement of foundry coke with bindered anthracite fines reduces costs and negative environmental impact while allowing for the increase in iron production. Others have shown that anthracite fines bindered with collagen (which provides strength from ambient temperatures to 400 °C), lignin (which provides strength between 400 °C and 1200 °C) and silicon metal (which provides strength at temperatures in excess of 1200 °C) can serve as a partial foundry coke substitute.
Silicon metal provides strength at high temperature by reacting with carbon present in the briquette to form interlocking networks of silicon carbide nanowires that originate on the surface of anthracite grains. Whereas others have shown that silicon metal could serve as a precursor for silicon carbide in bindered anthracite briquettes, the aim of this work was to determine whether rice
hull derived silica offered potential as a silicon carbide precursor for collagen and lignin bindered anthracite briquettes. Rice hulls and rice
hull char, waste products of the rice industry, are inexpensive and abundant resources of oxidized silicon.
Upon pyrolysis in a tube furnace at 1550 °C, silicon carbide formation occurred in samples via vapor phase reactions involving silicon monoxide gas. Silicon carbide nanowires readily formed during the pyrolysis of rice hulls and rice
hull char when anthracite was employed as an oxygen scavenger. Silicon carbide nanowires also formed during the pyrolysis of rice
hull char without an oxygen scavenger. Rice
hull char yielded more silicon carbide than rice hulls, per unit mass, under the same pyrolysis conditions. Silicon carbide also formed during the pyrolysis of anthracite bindered briquettes containing collagen, lignin, rice hulls and rice
hull char, when anthracite was employed as an oxygen scavenger. Silicon carbide product formations predominantly occurred on the external surface of the briquettes and this external product formation increased with increasing compression force and silica concentration, as well as decreasing anthracite grain size. White rice
hull ash served as a poor sole silicon carbide precursor for collagen and lignin bindered anthracite briquettes, yielding minimal silicon monoxide gas; but its use resulted in the formation of a variety of silica rods on the surfaces of internal anthracite grains.
Advisors/Committee Members: Fred Scott Cannon, Thesis Advisor/Co-Advisor, Sridhar Komarneni, Thesis Advisor/Co-Advisor.
Subjects/Keywords: Anthracite; Lignin; Rice hull; Silicon Carbide; Nanowire; Silica rod
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APA (6th Edition):
Jiles, A. M. (2013). Rice Hull Silica, A Silicon Carbide Precursor For Collagen, Lignin And Silicon Metal Powder Bindered Anthracite Briquettes. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/19077
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jiles, Allura Marie. “Rice Hull Silica, A Silicon Carbide Precursor For Collagen, Lignin And Silicon Metal Powder Bindered Anthracite Briquettes.” 2013. Thesis, Penn State University. Accessed January 20, 2021.
https://submit-etda.libraries.psu.edu/catalog/19077.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jiles, Allura Marie. “Rice Hull Silica, A Silicon Carbide Precursor For Collagen, Lignin And Silicon Metal Powder Bindered Anthracite Briquettes.” 2013. Web. 20 Jan 2021.
Vancouver:
Jiles AM. Rice Hull Silica, A Silicon Carbide Precursor For Collagen, Lignin And Silicon Metal Powder Bindered Anthracite Briquettes. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Jan 20].
Available from: https://submit-etda.libraries.psu.edu/catalog/19077.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jiles AM. Rice Hull Silica, A Silicon Carbide Precursor For Collagen, Lignin And Silicon Metal Powder Bindered Anthracite Briquettes. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/19077
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
24.
Gudaitė,
Ernesta.
Eko-inovatyvių technologijų taikymas KU mokslinių
tyrimų laivo statyboje.
Degree: Master, Transport Engineering, 2014, Klaipeda University
URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_154827-64131
;
► Šiame magistriniame darbe nagrinėjama gyvavimo ciklo metodika, kuri pritaikoma KU statomo Mokslinių tyrimo laivo korpuso suvirinimo metu išsiskiriančių emisijų skaičiavimui GaBi 6 programinės įrangos pagalba.…
(more)
▼ Šiame magistriniame darbe nagrinėjama
gyvavimo ciklo metodika, kuri pritaikoma KU statomo Mokslinių
tyrimo laivo korpuso suvirinimo metu išsiskiriančių emisijų
skaičiavimui GaBi 6 programinės įrangos pagalba. Nagrinėjami du
suvirinimo būdai, kurie buvo naudojami statant KU Mokslinių tyrimo
laivą, t. y. lankinis suvirinimas po fliusu (SAW) ir lankinis
suvirinimas lydžiuoju elektrodu apsauginėse dujose (MIG,
MAG).
This master thesis examines the life cycle
methodology that adjusts constructed KU research vessel shell weld
calculation of emissions released from 6 GaBi software. Analyzed
two welding techniques that have been used in the construction of
KU research vessel - submerged arc welding (SAW) and arc welding
electrode deposits for gas shielded (MIG,
MAG).
Advisors/Committee Members: Mickevičienė, Rima (Master’s thesis supervisor).
Subjects/Keywords: Laivas; Korpusas; Suvirininimas; Gyvavimo
ciklas; GaBi; Ship; Hull; Welding; LCA; GaBi
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APA (6th Edition):
Gudaitė,
Ernesta. (2014). Eko-inovatyvių technologijų taikymas KU mokslinių
tyrimų laivo statyboje. (Masters Thesis). Klaipeda University. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_154827-64131 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
Gudaitė,
Ernesta. “Eko-inovatyvių technologijų taikymas KU mokslinių
tyrimų laivo statyboje.” 2014. Masters Thesis, Klaipeda University. Accessed January 20, 2021.
http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_154827-64131 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
Gudaitė,
Ernesta. “Eko-inovatyvių technologijų taikymas KU mokslinių
tyrimų laivo statyboje.” 2014. Web. 20 Jan 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
Gudaitė,
Ernesta. Eko-inovatyvių technologijų taikymas KU mokslinių
tyrimų laivo statyboje. [Internet] [Masters thesis]. Klaipeda University; 2014. [cited 2021 Jan 20].
Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_154827-64131 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
Gudaitė,
Ernesta. Eko-inovatyvių technologijų taikymas KU mokslinių
tyrimų laivo statyboje. [Masters Thesis]. Klaipeda University; 2014. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_154827-64131 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
25.
Özer, Arzu.
Kavuzsuz arpanın fonksiyonel özelliklerinin iyileştirilmesi ve bisküvide kullanılabilme olanaklarının araştırılmas: Improvement of functional properties of hull-less barley and investigation of its possible usability in cookies.
Degree: Mühendislik Fakültesi, 2019, University of Ankara
URL: http://hdl.handle.net/20.500.12575/68980
► Kavuzsuz arpa içerdiği biyoaktif bileşiklerle son yıllarda dikkat çekmektedir. Tahıl ürünlerine uygulanan mikrofludizasyon işleminin ise ürünün fonksiyonel bileşiklerini olumlu yönde etkilediği görülmüştür. Bu çalışmada mikrofludizasyon…
(more)
▼ Kavuzsuz arpa içerdiği biyoaktif bileşiklerle son yıllarda dikkat çekmektedir. Tahıl ürünlerine uygulanan mikrofludizasyon işleminin ise ürünün fonksiyonel bileşiklerini olumlu yönde etkilediği görülmüştür. Bu çalışmada mikrofludizasyon işleminin kavuzsuz arpanın fonksiyonel özellikleri üzerine etkileri incelenmiş, ayrıca kavuzsuz tam arpa ununun bisküviye katılabilirliği araştırılmıştır. Bu amaçla mikrofludize edilmiş ve edilmemiş iki farklı kavuzsuz tam arpa unu (Özen ve Yalın), iki farklı yumuşak buğday ununa (Bayraktar 2000 ve Çetinel 2000) değişik oranlarda (%0, %25, %50, %75, %100) katılarak bisküvi yapılmış ve bisküvilerin fonksiyonel özellikleri, teknolojik kaliteleri ve duyusal özellikleri incelenmiştir. Kavuzsuz tam arpa ununa uygulanan mikrofludizasyon işlemi, unun β-glukan, diyet lif, fenolik madde ve antioksidan aktivitesini artırmış, fitik asit miktarını düşürmüştür. Kavuzsuz arpa unu katkısı, katma oranına bağlı olarak bisküvilerin fonksiyonel özelliklerini iyileştirmiş, bu etki mikrofludize kavuzsuz arpa unu katkılı örneklerde daha da belirgin olmuştur. Ayrıca mikrofludizasyon işlemi ile örneklerin fitik asit oranı yaklaşık %80 azaltılmıştır. Kavuzsuz arpa unu ve mikrofludize kavuzsuz arpa unu katkısı bisküvilerde çap ve yayılma oranını düşürmüş, bisküvilerin rengini koyulaştırmıştır. Bisküvilerin sertlik değeri kavuzsuz arpa unu katkısıyla artmış, mikrofludize kavuzsuz arpa unu katkısı ile azalmıştır. Kavuzsuz arpa unu katkısı, katma oranına bağlı olarak bisküvilerin duyusal özelliklerini olumsuz etkilemiş ve bu olumsuz etkiler mikrofludize kavuzsuz arpa unu katkılı olanlarda daha fazla gözlenmiştir. Çalışma sonuçlarından, kavuzsuz arpa unu katkısının bisküvinin teknolojik kalitesini biraz düşürse de, özellikle mikrofludize edildikten sonra fonksiyonel özelliklerini önemli derecede iyileştirdiği, bu nedenle de kavuzsuz arpa ununun bisküvide fonksiyonel özelliği artırıcı katkı olarak kullanılabileceği görülmektedir.
Advisors/Committee Members: ÖZKAYA, Berrin (advisor).
Subjects/Keywords: Hull-less barley; microfluidization; Phytic acid; Kavuzsuz arpa; Mikrofludizasyon; Fitik asit
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Özer, A. (2019). Kavuzsuz arpanın fonksiyonel özelliklerinin iyileştirilmesi ve bisküvide kullanılabilme olanaklarının araştırılmas: Improvement of functional properties of hull-less barley and investigation of its possible usability in cookies. (Masters Thesis). University of Ankara. Retrieved from http://hdl.handle.net/20.500.12575/68980
Chicago Manual of Style (16th Edition):
Özer, Arzu. “Kavuzsuz arpanın fonksiyonel özelliklerinin iyileştirilmesi ve bisküvide kullanılabilme olanaklarının araştırılmas: Improvement of functional properties of hull-less barley and investigation of its possible usability in cookies.” 2019. Masters Thesis, University of Ankara. Accessed January 20, 2021.
http://hdl.handle.net/20.500.12575/68980.
MLA Handbook (7th Edition):
Özer, Arzu. “Kavuzsuz arpanın fonksiyonel özelliklerinin iyileştirilmesi ve bisküvide kullanılabilme olanaklarının araştırılmas: Improvement of functional properties of hull-less barley and investigation of its possible usability in cookies.” 2019. Web. 20 Jan 2021.
Vancouver:
Özer A. Kavuzsuz arpanın fonksiyonel özelliklerinin iyileştirilmesi ve bisküvide kullanılabilme olanaklarının araştırılmas: Improvement of functional properties of hull-less barley and investigation of its possible usability in cookies. [Internet] [Masters thesis]. University of Ankara; 2019. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/20.500.12575/68980.
Council of Science Editors:
Özer A. Kavuzsuz arpanın fonksiyonel özelliklerinin iyileştirilmesi ve bisküvide kullanılabilme olanaklarının araştırılmas: Improvement of functional properties of hull-less barley and investigation of its possible usability in cookies. [Masters Thesis]. University of Ankara; 2019. Available from: http://hdl.handle.net/20.500.12575/68980
26.
Thomasse, Rémy.
Analyse de complexité d'enveloppes convexes aléatoires : Complexity analysis of random convex hulls.
Degree: Docteur es, Informatique, 2015, Nice
URL: http://www.theses.fr/2015NICE4116
► Dans cette thèse, nous donnons de nouveaux résultats sur la taille moyenne d’enveloppes convexes de points choisis dans un convexe. Cette taille est connue lorsque…
(more)
▼ Dans cette thèse, nous donnons de nouveaux résultats sur la taille moyenne d’enveloppes convexes de points choisis dans un convexe. Cette taille est connue lorsque les points sont choisis uniformément (et indépendamment) dans un polytope convexe, ou un convexe suffisamment «lisse» ; ou encore lorsque les points sont choisis indépendamment selon une loi normale centrée. Dans la première partie de cette thèse, nous développons une technique nous permettant de donner de nouveaux résultats lorsque les points sont choisis arbitrairement dans un convexe, puis «bruités» par une perturbation aléatoire. Ce type d’analyse, appelée analyse lissée, a initialement été développée par Spielman et Teng dans leur étude de l’algorithme du simplexe. Pour un ensemble de points arbitraires dans une boule, nous obtenons une borne inférieure et une borne supérieure de cette complexité lissée dans le cas de perturbations uniformes dans une boule en dimension arbitraire, ainsi que dans le cas de perturbations gaussiennes en dimension 2. La taille de l'enveloppe convexe de points choisis uniformément dans un convexe, peut avoir un comportement logarithmique si ce convexe est un polytope ou polynomial s’il est lisse. Nous construisons un convexe produisant un comportement oscillant entre ces deux extrêmes. Dans la dernière partie, nous présentons un algorithme pour engendrer efficacement une enveloppe convexe aléatoire de points choisis uniformément et indépendamment dans un disque sans avoir à engendrer explicitement tous les points. Il a été implémenté en C++ et intégré dans la bibliothèque CGAL.
In this thesis, we give some new results about the average size of convex hulls made of points chosen in a convex body. This size is known when the points are chosen uniformly (and independently) in a convex polytope or in a "smooth" enough convex body. This average size is also known if the points are independently chosen according to a centered Gaussian distribution. In the first part of this thesis, we introduce a technique that will give new results when the points are chosen arbitrarily in a convex body, and then noised by some random perturbations. This kind of analysis, called smoothed analysis, has been initially developed by Spielman and Teng in their study of the simplex algorithm. For an arbitrary set of point in a ball, we obtain a lower and a upper bound for this smoothed complexity, in the case of uniform perturbation in a ball (in arbitrary dimension) and in the case of Gaussian perturbations in dimension 2. The asymptotic behavior of the expected size of the convex hull of uniformly random points in a convex body is polynomial for a "smooth" body and polylogarithmic for a polytope. In the second part, we construct a convex body so that the expected size of the convex hull of points uniformly chosen in that body oscillates between these two behaviors when the number of points increases. In the last part, we present an algorithm to generate efficiently a random convex hull made of points chosen uniformly and independently in a disk.…
Advisors/Committee Members: Devillers, Olivier (thesis director).
Subjects/Keywords: Enveloppe convexe; Analyse lissée; Complexité; Convex hull; Smoothed analysis; Complexity
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APA ·
Chicago ·
MLA ·
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CSE |
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APA (6th Edition):
Thomasse, R. (2015). Analyse de complexité d'enveloppes convexes aléatoires : Complexity analysis of random convex hulls. (Doctoral Dissertation). Nice. Retrieved from http://www.theses.fr/2015NICE4116
Chicago Manual of Style (16th Edition):
Thomasse, Rémy. “Analyse de complexité d'enveloppes convexes aléatoires : Complexity analysis of random convex hulls.” 2015. Doctoral Dissertation, Nice. Accessed January 20, 2021.
http://www.theses.fr/2015NICE4116.
MLA Handbook (7th Edition):
Thomasse, Rémy. “Analyse de complexité d'enveloppes convexes aléatoires : Complexity analysis of random convex hulls.” 2015. Web. 20 Jan 2021.
Vancouver:
Thomasse R. Analyse de complexité d'enveloppes convexes aléatoires : Complexity analysis of random convex hulls. [Internet] [Doctoral dissertation]. Nice; 2015. [cited 2021 Jan 20].
Available from: http://www.theses.fr/2015NICE4116.
Council of Science Editors:
Thomasse R. Analyse de complexité d'enveloppes convexes aléatoires : Complexity analysis of random convex hulls. [Doctoral Dissertation]. Nice; 2015. Available from: http://www.theses.fr/2015NICE4116
Oregon State University
27.
Wisner, George B.
Hull-Oakes Lumber Company's steam-powered sawmill : a case study in industrial archaeology.
Degree: MA, 1995, Oregon State University
URL: http://hdl.handle.net/1957/36002
► By examining the combined written, ethnographic and physical evidence of a surviving steam-powered sawmill in the Douglas-fir region of the Pacific Northwest, this thesis seeks…
(more)
▼ By examining the combined written, ethnographic and physical evidence of a surviving
steam-powered sawmill in the Douglas-fir region of the Pacific Northwest, this thesis
seeks to supply new insights into the operation and adaptability of antiquated machinery
during a period of rapid social and technological change and to develop a descriptive
model for the sawmill industry. Steam-powered sawmills, those mills using steam power
to operate primary and secondary lumber-cutting saws. are now dinosaurs in the sawmill
industry. They are a vanishing example of a mechanical process once common
throughout America. This thesis describes a last-of-its-kind commercially-operating
medium-sized steam-powered sawmill, the
Hull-Oakes Lumber Co. Inc. sawmill in south
Benton County, Oregon. It also explores how this sawmill survived through
specialization rather than through wholesale adoption of emerging technologies. By
examining a surviving sawmill that uses antiquated machinery, this thesis captures in
part the way of life of the builders and practicers of the arts the industry represents: it
also offers new insights for future researchers seeking to understand and explain
industrial adaptability and cultural remains from similar sites. it does this by describing
through words, photographs, diagrams and maps how such mills worked. what the
machinery and its parts looked like, and what physical traces such mills might be
expected to leave after they are gone.
Advisors/Committee Members: Brauner, David R. (advisor).
Subjects/Keywords: Hull-Oakes Lumber Company – History
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APA ·
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APA (6th Edition):
Wisner, G. B. (1995). Hull-Oakes Lumber Company's steam-powered sawmill : a case study in industrial archaeology. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/36002
Chicago Manual of Style (16th Edition):
Wisner, George B. “Hull-Oakes Lumber Company's steam-powered sawmill : a case study in industrial archaeology.” 1995. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/36002.
MLA Handbook (7th Edition):
Wisner, George B. “Hull-Oakes Lumber Company's steam-powered sawmill : a case study in industrial archaeology.” 1995. Web. 20 Jan 2021.
Vancouver:
Wisner GB. Hull-Oakes Lumber Company's steam-powered sawmill : a case study in industrial archaeology. [Internet] [Masters thesis]. Oregon State University; 1995. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/36002.
Council of Science Editors:
Wisner GB. Hull-Oakes Lumber Company's steam-powered sawmill : a case study in industrial archaeology. [Masters Thesis]. Oregon State University; 1995. Available from: http://hdl.handle.net/1957/36002
Vilnius Pedagogical University
28.
Andrejev,
Andrej.
Iškilojo apvalaklo taškų sukūrimo atviri
algoritmai, jų programavimas bei tyrimas.
Degree: Master, Informatics, 2008, Vilnius Pedagogical University
URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_181002-26987
;
► Šiame darbe yra trumpai aprašomas algoritmas, kuris naudoja nereikalingus skaičiavimus, ieškant iškilojo apvalkalo taškų. Pateikiamas naujas „Artimiausio taško“ algoritmas, kuris iškilojo apvalkalo taškus randa įterpimo…
(more)
▼ Šiame darbe yra trumpai aprašomas
algoritmas, kuris naudoja nereikalingus skaičiavimus, ieškant
iškilojo apvalkalo taškų. Pateikiamas naujas „Artimiausio taško“
algoritmas, kuris iškilojo apvalkalo taškus randa įterpimo būdu.
Pateikiamos ir dvi „Artimiausio taško“ algoritmo realizacijos.
„Preparata“ bei „Artimiausio taško“ algoritmai, bei „Artimiausio
taško“ algoritmo dvi realizacijos realizuojamos skirtingose
operacinėse sistemose: Windows ir Linux. Realizavus algoritmus
(„Preparata“, „Artimiausio taško“) ir dvi „Artimiausio taško“
algoritmo realizacijas, buvo analizuojamas algoritmų atlikimo
laikas.
This work shortly describes the algorithms,
that uses unnecessary calculations for the search of convex hull
points. A new algorithm called “Nearest point” is presented in this
work. This algorithm founds the points of convex hull by using the
method of insertion. Two realisations of the “Nearest point”
realisation are presented in the current work.. The “Preparata”
algorithm, the “Nearest point” algorithm, and two realisations of
the “Nearest point” algorithm were build both for Windows and Linux
operating systems. After the realisation of the algorithms
(“Preparata” and “Nearest point”) and two versions of the “Nearest
point”, the action time of them has been
analysed.
Advisors/Committee Members: Kazlauskas, Kazys (Master’s degree committee chair), Nekrašaitė, Kristina (Master’s degree session secretary), Dzemyda, Gintautas (Master’s degree committee member), Kligienė, Nerutė (Master’s degree committee member), Lipeikienė, Joana (Master’s degree committee member), Petkus, Tomas (Master’s degree session secretary), Melničenko, Grigorijus (Master’s thesis supervisor), Petkus, Tomas (Master’s thesis reviewer).
Subjects/Keywords: Iškilojo; Apvalkalo; Atviri; Algoritmai; Open; Algorithms; Creating; Hull
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
Andrejev,
Andrej. (2008). Iškilojo apvalaklo taškų sukūrimo atviri
algoritmai, jų programavimas bei tyrimas. (Masters Thesis). Vilnius Pedagogical University. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_181002-26987 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
Andrejev,
Andrej. “Iškilojo apvalaklo taškų sukūrimo atviri
algoritmai, jų programavimas bei tyrimas.” 2008. Masters Thesis, Vilnius Pedagogical University. Accessed January 20, 2021.
http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_181002-26987 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
Andrejev,
Andrej. “Iškilojo apvalaklo taškų sukūrimo atviri
algoritmai, jų programavimas bei tyrimas.” 2008. Web. 20 Jan 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
Andrejev,
Andrej. Iškilojo apvalaklo taškų sukūrimo atviri
algoritmai, jų programavimas bei tyrimas. [Internet] [Masters thesis]. Vilnius Pedagogical University; 2008. [cited 2021 Jan 20].
Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_181002-26987 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
Andrejev,
Andrej. Iškilojo apvalaklo taškų sukūrimo atviri
algoritmai, jų programavimas bei tyrimas. [Masters Thesis]. Vilnius Pedagogical University; 2008. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_181002-26987 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
University of Ottawa
29.
Durocher, Kathleen.
Pour sortir les allumettières de l’ombre : conditions de travail et de vie des allumettières à la E.B. Eddy Match de Hull, 1854 à 1928
.
Degree: 2019, University of Ottawa
URL: http://hdl.handle.net/10393/39618
► Cette thèse s’intéresse à l’histoire des allumettières de la E.B. Eddy Match de Hull des années 1850 jusqu’au déménagement de l’entreprise, en 1928. Pendant plus…
(more)
▼ Cette thèse s’intéresse à l’histoire des allumettières de la E.B. Eddy Match de Hull des années 1850 jusqu’au déménagement de l’entreprise, en 1928. Pendant plus de sept décennies, des centaines de femmes s’affairent à la confection d’allumettes, ce bien nécessaire à tous quotidiennement. L’expérience des ouvrières employées par le plus grand producteur de cette industrie au Canada se définit par leurs conditions de vie et de travail difficiles. Bien que des améliorations s’observent au fil des ans, particulièrement à l’intérieur de la fabrique, la pauvreté de la classe ouvrière et les dangers de l’emploi restent une réalité bien présente.
Pour mener à bien cette recherche, nous proposons dans un premier temps un examen de celles qui composent cette main-d’œuvre. En nous appuyant principalement sur les données du recensement canadien, nous examinons le portrait démographique et la situation socio-économique des allumettières, en plus de leur apport à la survie familiale. De ce fait, nous soulevons pourquoi le poids économique des jeunes filles et des femmes s’avère non négligeable pour de nombreux ménages dans un contexte de précarité qui touche l’ensemble de la classe populaire.
Dans un deuxième temps, les conditions de travail sont observées. En utilisant l’exemple de l’emploi du phosphore blanc dans la confection d’allumettes, nous abordons les risques du métier présents au cours du 19e siècle jusqu’au début des années 1910. Alors que la substance est retirée du processus de production, d’autres dangers subsistent. Les conditions de travail dans les années 1920 subissent certaines avancées, mais restent généralement précaires. Les heures de travail sont réduites, mais les salaires n’augmentent pas nécessairement. La syndicalisation des travailleuses amène quelques progrès et laisse voir la volonté d’implication des allumettières dans le mouvement ouvrier catholique. Toutefois, l’expérience se termine par un échec et cause fort probablement le départ de la compagnie en 1928.
Subjects/Keywords: allumettières;
E.B. Eddy Match;
Hull, 1854 à 1928
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APA (6th Edition):
Durocher, K. (2019). Pour sortir les allumettières de l’ombre : conditions de travail et de vie des allumettières à la E.B. Eddy Match de Hull, 1854 à 1928
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/39618
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Durocher, Kathleen. “Pour sortir les allumettières de l’ombre : conditions de travail et de vie des allumettières à la E.B. Eddy Match de Hull, 1854 à 1928
.” 2019. Thesis, University of Ottawa. Accessed January 20, 2021.
http://hdl.handle.net/10393/39618.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Durocher, Kathleen. “Pour sortir les allumettières de l’ombre : conditions de travail et de vie des allumettières à la E.B. Eddy Match de Hull, 1854 à 1928
.” 2019. Web. 20 Jan 2021.
Vancouver:
Durocher K. Pour sortir les allumettières de l’ombre : conditions de travail et de vie des allumettières à la E.B. Eddy Match de Hull, 1854 à 1928
. [Internet] [Thesis]. University of Ottawa; 2019. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10393/39618.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Durocher K. Pour sortir les allumettières de l’ombre : conditions de travail et de vie des allumettières à la E.B. Eddy Match de Hull, 1854 à 1928
. [Thesis]. University of Ottawa; 2019. Available from: http://hdl.handle.net/10393/39618
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Houston
30.
Lombardi, Michael Edward 1982-.
CONVEX HULL METHOD FOR SRV ESTIMATION.
Degree: MS, Geophysics, 2014, University of Houston
URL: http://hdl.handle.net/10657/1392
► The prevalent use of induced hydraulic fracturing, commonly known as fracking, in reservoirs for shale gas demands that changes in geophysical properties within the fractured…
(more)
▼ The prevalent use of induced hydraulic fracturing, commonly known as fracking, in reservoirs for shale gas demands that changes in geophysical properties within the fractured rock be studied. Hydraulic fracturing events typically take place over several hours. During this time, the seismic anisotropy of the reservoir rapidly changes. These dynamic seismic velocities can be modeled from reservoir attributes and properties that change during the fracking process. One such dynamic property is the stimulated reservoir volume (SRV) which has been investigated using the Cube and Surfer methods (Adejuyigbe, 2013). For this thesis, we present a new method for modeling the SRV based on minimum convex hulls. This method was implemented and tested using data from the Dollie Thorell Well in the Barnett shale in North Texas. Results from those tests show that the convex
hull method is robust at modeling scattered microseismic event sets of spherical or cylindrical character. For these microseismic event sets, this modeling technique yielded a logarithmic increase in stimulated reservoir volume over time. The minimum convex
hull method was implemented as a module within a 4D software framework to allow for the uniform data representation, processing flow, and visualization of future research methods. This work provides a starting point for SRV estimation research by investigating the minimum convex
hull method while delivering effective 4D tools for future SRV estimation studies.
Advisors/Committee Members: Chesnokov, Evgeni M. (advisor), Kouri, Donald J. (committee member), Li, Aibing (committee member).
Subjects/Keywords: Stimulated Reservoir Volume; SRV; Convex hull; 4D; Microseismic
Record Details
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Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lombardi, M. E. 1. (2014). CONVEX HULL METHOD FOR SRV ESTIMATION. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/1392
Chicago Manual of Style (16th Edition):
Lombardi, Michael Edward 1982-. “CONVEX HULL METHOD FOR SRV ESTIMATION.” 2014. Masters Thesis, University of Houston. Accessed January 20, 2021.
http://hdl.handle.net/10657/1392.
MLA Handbook (7th Edition):
Lombardi, Michael Edward 1982-. “CONVEX HULL METHOD FOR SRV ESTIMATION.” 2014. Web. 20 Jan 2021.
Vancouver:
Lombardi ME1. CONVEX HULL METHOD FOR SRV ESTIMATION. [Internet] [Masters thesis]. University of Houston; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/10657/1392.
Council of Science Editors:
Lombardi ME1. CONVEX HULL METHOD FOR SRV ESTIMATION. [Masters Thesis]. University of Houston; 2014. Available from: http://hdl.handle.net/10657/1392
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Open Access Theses and Dissertations
