Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"Decomposition techniques"”.
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Decomposition techniques for large-scale optimization in the supply chain
… problem lends itself well to application of decomposition techniques intended to speed up solution time. Exact techniques, such as Benders decomposition, are explored as a baseline. Classical Benders decomposition is applied to the manufacturing plant model, and results indicate that Benders …
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Changes in inequality in South Africa : the effect of human capital on inequality using decomposition techniques
This paper analyses changes in the inequality of employment earnings in South Africa between 1993 and 2008. This is done through the implementation of a relatively new method of comparing the contributions of various factors to observed changes in incomes distributions. Counterfactual earnings …
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Exploring Changes in Poverty in Zimbabwe between 1995 and 2001 using Parametric and Nonparametric Quantile Regression Decomposition Techniques
… extends Machado and Mata's parametric quantile decomposition method and a similar nonparametric technique to explore changes in welfare in Zimbabwe between 1995 and 2001. These methods allow us to construct a counterfactual distribution in order to decompose the shift into the part due to …
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Color Models for Image Decomposition
… from an image. This work is a study of image decomposition techniques for color images. The decomposition of color images presents a new challenge since the choice of the color model has an effect on the resulting images. The color models are tested for both structure + noise and cartoon + …
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Soil parameter retrieval under vegetation cover using SAR polarimetry
… variability on large scales, remote sensing techniques are required. Therefore the determination of soil parameters under vegetation cover was approached in this thesis by means of (multi-angular) polarimetric SAR acquisitions at a longer wavelength (L-band, lambda=23cm). In this thesis, the …
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Decentralized control of large space structures:an overview
This thesis examines several techniques for the design of decentralized control strategies for the active control of vibrational damping in large space structures. A brief description of the finite element method is presented to explain the derivation of mathematical models of flexible structures …
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An examination of labour discrimination in South Africa 2005-2008 : discussion and sensitivity analysis
… Using probit analysis, as well as non-linear decomposition techniques, this paper investigate the effects these policies have had on the labour market, in light of the recent economic recession experienced locally and abroad. Results indicate that racial labour discrimination still exists …
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Polarimetric radar processing of AIRSAR imagery from Los Angeles basin region
… the advancement of efficient PolInSAR processing techniques, an investigation of underlying scattering mechanisms such as coherent scatterers (CS) and polarimetric decomposition techniques is conducted in this study using JPL AIRSAR fully polarimetric data over a portion of the greater Los Angeles …
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A mathematical programming based model and algorithm for a two stage production process
… is based on Lagrangian Relaxation and Benders' decomposition techniques, which exploit the inherent generalized assignment and travelling salesman problem substructures in the model. The algorithm is computationally intensive and generates (near) optimal solutions with a reasonable amount of …
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Modeling and control of hydronic building HVAC systems
… complex hydronic networks. Further, time-scale decomposition techniques have been employed to obtain a more succinct representation of the overall system dynamics. The proposed model is then used to design predictive control strategies which are compared with traditional feedback control schemes …
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MEAN REVERSION MODELING WITH APPLICATION IN ENERGY MARKETS
… of mean-reversion by incorporating wavelet-decomposition techniques into the one-factor Schwartz model. As a de-noising method, the wavelet filter is a useful tool to track the cycles of the price movements which can be modeled by mean-reversion. The second model can be used to describe mean …
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Prospecting for elements: Galactic halo planetary nebulae abundances and Virgo spiral galaxy color profiles.
… to probing the underlying stellar metallicity. Decomposition techniques have been used to produce estimates of spiral bulge/disk masses and luminosities in all three J, H, & K bands, as well as to explore the variation of mass-to-light ratios within the separate galaxy components. An analysis of …
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Distributed Method to Optimal Profile Descent
… then solved in a decentralized manner using dual decomposition techniques under inter-aircraft ADS-B mechanism. This method divides the optimization problem into more manageable sub-problems which are then distributed to the group of aircraft. Each aircraft solves its assigned sub-problem and …
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DTM Generation in Forested Areas from Full-Waveform Airborne LiDAR Data
… but undetectable using traditional Gaussian decomposition techniques. The secondary objective was to validate the developed methodology using ground reference data. An integrated approach was developed to detect weak returns backscattered by the bare terrain using full-waveform data and …
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Wage Inequality: A Gender and Race Analysis of South African Wages between 1994 and 2015
… Atkinson class of measures and Oaxaca-Blinder Decomposition techniques. Quantile regressions are also run to identify potential factors that could explain inequality in the country. Inequality between 1994 and 2015 has increased and the decomposition of the General Entropy class of indices and …
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Model-based monitoring and diagnosis of systems with software-extended behavior
… into independent subproblems using tree decomposition techniques. There are two advantages to this approach. First, the approach enables finite-horizon diagnosis in the presence of delayed symptoms. Second, the soft COP formulation provides convenient expressivity for encoding the PHCA …
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Unequal women. Labour market inequalities at the intersection of gender and class.
… market discrimination is studied using both decomposition techniques based on survey data and experimental methods based on primary data collection.
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Integrated Optimal Design of Structures Subjected to Alternate Loads Using Geometric Programming
A parallel decomposition for two or more alternative loading conditions in the integrated optimum structural design is investigated. The method developed, called move coordination, consists of formulating the large optimization problem in the form of smaller subproblems based on the load …
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An evaluation of noise reduction algorithms for particle-based fluid simulations in multi-scale applications
… the substantial noise associated with particle techniques, which disturbs the analysis of the results. The uncertainty in the mean of the ensemble is due to fluctuations caused e.g. by additional forcing terms (thermostats). Extracting the genuine information from indirect, noisy measurements is …
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Using interior point algorithms for the solution of linear programs with special structural features
… and efficiently implementing the latest techniques in this field taking sparsity into account. The performance of these implementations on different classes of LP problems is reported here. The preconditional conjugate gradient method is one of the most powerful tools for the solution of …
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