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 220 for “"optimizer"”.
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A Large Collection Learning Optimizer Framework
… framework to develop a large collection learning optimizer to generate a highly performant classifier. For our preliminary case studies, we are able to achieve an F1 score of 0.96 that is based on Word2Vec and Logistic Regression. The AR classifier achieved an F1 score of 0.90 on the same data. …
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A planner/optimizer/executioner for content mediated queries
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Capabilities aware planner/optimizer/executioner for COntext INterchange Project
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Towards a design of HMO, an integrated hardware microcode optimizer
<p>"This paper discusses an algorithm for optimizing the density and parallelism of microcoded routines in micro-programmable machines. Besides presenting the algorithm itself, this research also analyzes the algorithm's uses, design integration problems, architectural requirements, and …
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The tabu ant colony optimizer and its application in an energy market
<p>"A new ant colony optimizer, the 'tabu ant colony optimizer' (TabuACO) is introduced, tested, and applied to a contemporary problem. The TabuACO uses both attractive and repulsive pheromones to speed convergence to a solution. The dual pheromone TabuACO is benchmarked against several other …
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Preliminary Design of an Autonomous Underwater Vehicle Using a Multiple-Objective Genetic Optimizer
The process developed herein uses a Multiple Objective Genetic Optimization (MOGO) algorithm. The optimization is implemented in ModelCenter (MC) from Phoenix Integration. It uses a genetic algorithm that searches the design space for optimal, feasible designs by considering three Measures of …
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Global Optimization of MGA-DSM Problems Using the Interplanetary Gravity Assist Trajectory Optimizer (IGATO)
… the open-source Parallel Multiobjective Global Optimizer created by ESA's Advanced Concepts Team (ACT). PaGMO is an implementation of the Island Model Paradigm which allows the parallelization of different global optimizers. The second part of this work introduces the IGATO software which …
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Utveckling av en metod, Care Optimizer, för mätning av vårdbehov och resursanvändning inom kommunal äldreomsorg
… av personal. Den första är en svensk metod (Care Optimizer) och den andra en i England etablerad metod (Acuity-Quality). Jämförelsen baseras på samma empiriska data. Syftet var även att analysera metodernas styrkor och svagheter relaterat till utfallet. Studie 1 genomfördes på 13 särskilda boenden …
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Novel optimizers for multi-objective deep learning
… Optimization problems. Multi-objective optimizers are suitable for training machine learning algorithms as they can minimize several loss functions simultaneously. Additionally, providing a set of weight configurations with Pareto front solutions in multi-objective optimization offers …
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Cost-Based Optimization for Semantic Operator Systems
… can be difficult to optimize. For example, an optimizer may need to determine which model, prompting strategy, and retrieval mechanism to use for each operator. Existing optimizers are limited in the number of optimizations they can apply, and most (if not all) cannot optimize system quality, …
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The constrained geometry of structures : optimization methods for inverse form-finding design
… the implementation of such workflows in a nested optimizer loop, the requirements on each component are articulated. The inner optimizer is a specially selected direct form-finding solver, the outer optimizer is a general-purpose optimization routine. This is demonstrated with case studies of two …
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Optimizing Memory-Resident Decision Support System Workloads for Cache Memories
… database system components: algorithms and query optimizer. In the former, blocking and prefetching are applied to database algorithms. In the latter the first public domain cache-oriented query optimizer is proposed. This optimizer chooses the ordering of operations and implementation of those …
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Toward automated design of Combined Cycle Propulsion
… engineering tool called the HYbrid PRopulsion Optimizer (HyPro) is presented, with the aim of analysing the performance of diverse engine concepts. The tool is conceived to be modular and flexible, and makes use of parsimonious modelling, in order to describe the engine at an high level of …
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Design study and analysis of a conventional radial-field flux-switching permanent magnet machine for a medium-speed wind turbine
… solution compared to using a computerized optimizer; as well as an in-depth core loss analysis. The designing process started with an analytical design that was used for initial design purposes, and this was followed by numerical simulations to get an optimized solution. Within the …
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Optimizing the Design of Robot Environments via Interleaved Optimization and White-Box Motion-Planning
… we can instead use the operation of an outer optimizer to restrict the work done by an inner graph-based planner. We dub this tight integration between the optimizer and motion planner a “white box” optimization approach, and propose two methods of actualizing it. We note that each of these …
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Strategizing against online learners in normal form repeated games
… to choose his strategy in each round; and an optimizer, which knows the learner’s utility function, parameters and the learner’s online learning algorithm. The optimizer wants to plan ahead to maximize his own utility while taking into account the learner’s behavior. We study this setting in …
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Estimating temporary file sizes for query graphs in distributed relational database systems
… implements a part of the front-end software, the Optimizer, of the distributed database system being developed at Virginia Tech. The Optimizer generates a strategy for optimal query processing, and it presents and analyzes a given query by means of query trees and query graphs. This thesis …
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Improved convergence for optimization of evasive maneuvering
… degrades both the speed and the reliability of optimizer convergence. A solution is offered, proposing that the optimization algorithm be operated in a new parameter space, in which the discontinuity occurs at infinity. Effectively, the mapping prevents the optimization algorithm from crossing …
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Design Studies for Future EAD-Propelled Aircraft
… by a geometric programming aircraft design optimizer. This thesis presents an experimental campaign to validate and improve models used by the optimizer. Models of interest are mass, drag, electrical, and structural. Preliminary experiments involve wing bending, charge-buildup on flight …
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Modeling and Optimization of Turbine-Based Combined-Cycle Engine Performance
… models are developed and optimized. A hybrid optimizer is developed, combining the global accuracy of probabilistic optimization with the local efficiency of gradient-based optimization. Trade studies are performed to determine the sensitivity of TBCC performance to various design variables …
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