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 186 for “"space model"”.
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Environmental Design Space model assessment
The Environmental Design Space (EDS) is a multi-disciplinary design tool used to explore trade-offs among aircraft fuel burn, emissions, and noise. This thesis uses multiple metrics to assess an EDS model of a Boeing 777 aircraft. Starting from a detailed description of the EDS framework, a …
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A state space model for inflation
… parameter assumption in Wilkie's Inflation model may be too restrictive. In this work we investigate the model proposed by Arsad (1999), where the mean level of inflation is assume to follow an AR(1) process. We compare the result obtained when prior knowledge of the initial parameter state …
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Context-based motion retrieval using vector space model
… and its semantics. Our approach uses vector space model to measure the similarities among motions, which are made discrete using the vocabulary technique and transformation invariant using the relational feature model. In our approach, relational features are first extracted from motion data. …
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A trade space model for robotic lunar exploration
… quantitative methodology for exploring the trade space of potential in situ robotic lunar spacecraft designs. A science value model was developed, using Multi-Attribute Utility Theory (MAUT), to estimate the effectiveness of a spacecraft design towards assessing a set of specified science …
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State Space Model of a Light Weight Flexible Telescope
… the goal of this thesis is to build a state space model of a two-degree-of-freedom telescope using a known star location as feedback. The model presented in this thesis may be used for the telescope simulation and the control design in the future. This project considers a light weight …
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Motor control and learning by the state space model
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Psychology.
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Evaluation of the flail space model utilizing event data recorder technology
<p>Developed in the early 1980's, the flail space model has become the standard method for estimating occupant risk in full-scale crash tests involving roadside safety features. The widespread availability of airbags and increased seat belt usage rates in today's vehicle fleet, however, raise …
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An investigation of the cognitive foundation underlying the rule-space model
… foundations underlying K. Tatsuoka's rule-space model. Rule space is a statistical method for classifying students' test item responses into a set of attribute mastery patterns associated with different cognitive skills. An attribute is a description of the procedures, skills, processes, …
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Factor-based replication of hedge funds using a state space model
It has been suggested that the Kalman filter technique may be used to improve the quality of hedge fund replication, compared to existing replication techniques. This study uses the Kalman filter technique, along with three variations of the rolling-window regression technique, to create clones …
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The T-Space Model : maximizing value and revenue of transit real estate assets
We founded T-Space in response to the underutilization of transit stations and the opportunity it presents itself being a high volume, small footprint space with a strong network to residential neighborhoods and employment centers. As a team, we found ourselves asking: Can transit stations be an …
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Melt Pool Feature Extraction, A State-Space Model and Spatial Layer-to-Layer Control for Powder Bed Fusion
… presents a novel spatial, layer-to-layer, state-space control-oriented model for PBF, which transforms a temporal heat transfer model into a voxel-based spatial model, which is easy to analyze and implement. Output controllability is discussed. Simulations are presented to demonstrate the …
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Application of the Rule Space Model to the Reading Comprehension Section of the Test of English as a Foreign Language (Toefl)
The purpose of this study was to apply the Rule Space Model, a cognitive diagnostic test model, to a foreign language proficiency test. The analyses focused on the reading comprehension section of the Test of English as a Foreign Language (TOEFL). The study consisted of the following three parts: …
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Developing a Design Space Model Using a Multidisciplinary Design Optimization Schema in a Product Lifecycle Management System to Capture Knowledge for Reuse
… optimization (MDO) schema. Knowledge of a design space can be modeled by using a MDO schema to represent the design process. However, current MDO frameworks used to create this schema lack the scope to capture enterprise wide knowledge for reuse and collaboration. Concurrent with the development …
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State-space modeling and optimal control of ship motions in a seastate
In this thesis, a new state-space model and motion control algorithm are developed from first principles for the improvement of the seakeeping performance of high-speed vessels equipped with lifting appendages that are actively controlled in regular and random waves. A ship at sea can experience …
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Approximation of integro-partial differential equations of hyperbolic type
A state space model is developed for a class of integro-partial differential equations of hyperbolic type which arise in viscoelasticity. An approximation scheme is developed based on a spline approximation in the spatial variable and an averaging approximation in the de1ay variable. Techniques …
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Structured linear algebra problems and applications to system identification
… of the multi-input/multi-output (MIMO) state space identification problem. Finally, theoretical results are given that relate to the problem of determining the distance of a state space model from a state space model that is non-minimal. This may be interpreted as an attempt to show that the …
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Issues of Real Time Information Retrieval in Large, Dynamic and Heterogeneous Search Spaces
… are not efficient in such dynamic search spaces and cannot quickly provide the most current results. Due to the explosive growth of the internet, stove-piped approaches for dealing with dynamism by simply employing large computational resources are ultimately not scalable. A new processing …
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Distributed parameter estimation for complex energy systems
… as well as the environment. In this thesis, we model components in terms of their own internal dynamics and output variables at the interfaces with the neighboring components. We then propose to use a distributed estimation method for obtaining the parameters of the the component's internal …
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Modeling and prediction of wind power data
… power prediction. We used different time series models in statistics to predict wind power, including ARIMA model, SARIMA model, ARAR model, Holt-Winters method, and a state-space model. We compared the difference between the predicted data and the original data. We conclude that a state space …
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