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 35 for “"Discrete continuous"”.
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Analyzing the opinion dynamics models discrete & continuous
… we analyze some of the opinion dynamics in both discrete and continuous cases. In the discrete case, we will find some criteria under which we can say more about the behavior of the dynamics such as convergence of the agents to the same opinion, or consensus. For this purpose, we first consider …
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Discrete-continuous optimization for robot perception via semidefinite relaxation
… top of MRF models, our second contribution is a Discrete-Continuous Graphical Model (DC-GM) that combines discrete binary labeling with standard least-square pose graph optimization to identify and reject spurious measurements for Simultaneous Localization and Mapping (SLAM). We then perform …
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Fast execution of temporal plans with mixed discrete-continuous state constraints
… However, existing approaches use simple discrete models to achieve goal sequences and thus cannot provide a high-fidelity plan for complex plan specifications in terms of time and state. In this thesis, we deliver Amundsen, an efficient configuration manager that supports complex …
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Reliable Decentralized Controller Design for Discrete/continuous-Time, Sampled-Data, and Multirate Systems
… preselected set of sensors or actuators. The discrete-time divided-difference operator formulation facilitates the solution of three problems: the unification of discrete- and continuous-time results for sampled-data systems, providing a numerical method for solving the decentralized …
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Development of a C-based simulation toolkit supporting discrete, continuous, and combined simulation
… Toolkit (CBST) was developed. It supports discrete, continuous, and combined simulation. CBST is a group of simulation support functions written in the language C. CBST functions are used within a specific framework similar to that of GASP IV. It employs the event scheduling world view for …
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Fare policy analysis for public transport : a discrete-continuous modeling approach using panel data
… of public transport users to fare changes. A discrete-continuous framework is proposed in which ticket choice is modeled at the higher (discrete) level and frequencies of public transport use, based on mode and time-of-day, are modeled at the lower (continuous) level. This framework takes …
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Analysis of passive and active discrete-distributed linear dynamical systems using Green's function methods
… the dynamics of a large class of linear passive discrete-distributed mechanical systems has been performed, unifying and extending previous results in the field. A distributed parameter system, represented by the Green's function of its governing differential equation, and a multiplicity of …
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The Theory and Applications of Discrete Constrained Optimization Using Lagrange Multipliers
… DLM is able to solve systematically general discrete, continuous and mixed-integer constrained benchmarks, which is a task not achieved by previous methods. DLM has found better multiplierless filter-bank designs that improve over all of Johnston's benchmark designs using a maximum of three …
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Capturing the impacts of land use on travel behavior : comparison of modeling approaches
… and travel behavior. The first analysis uses a discrete-continuous choice model to understand the attributes that influence car-ownership and travel emissions. The second study uses structural equation modeling to simultaneously estimate latent urban form factors, car-ownership and emitted …
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Probability theory on time scales and applications to finance and inequalities
… is applied to probability theory, thus unifying discrete, continuous and many other cases. A short introduction to the theory of time scales is provided. Following this preliminary overview, the moment generating function is derived using a Laplace transformation on time scales. Various …
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A multi-loop guidance scheme using singular perturbation and linear quadratic regulator techniques simultaneously
A design method for a multi-loop mixed discrete/continuous trajectory following pitch control algorithm for a generic aerospace vehicle is presented. This design methodology is facilitated by a time scale separation observed in the dynamical system. Two variations of this algorithm are considered, …
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Material flow simulation in a nuclear chemical process
… of selected constituent SNM. A combined discrete-continuous, time-dependent model using the GASP IV simulation language is developed to simulate mass flow, material accountability and measurement error at each stage of the reprocessing plant. The study demonstrates that the simulation …
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Fast, approximate state estimation of concurrent probabilistic hybrid automata
… is to describe them in terms of a mixture of continuous and discrete variables. Unfortunately, hybrid estimation is typically intractable due to the large space of possible assignments to the discrete variables. In this thesis, we investigate how to incorporate conflict directed techniques …
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An Empirical Analysis of the Determinants of Initial Occupational Choice by Male High School Graduates
… The empirical model consisted of a mixed discrete/continuous simultaneous 4 equation system. Three estimation strategies were used. The first was a sample two stage logit/ordinary least squares procedure. The second was a modified two stage logit/ordinary least squares procedure that …
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A probabilistic graphical model based data compression architecture for Gaussian sources
… concept into the domain of lossy compression of continuous sources, in particular, Gaussian sources. To our knowledge, this is the first attempt with using with sparse linear coding and discrete-continuous hybrid graphical model decoding for compressing continuous sources. With the flexibility …
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An inertial measurement-based gait detection system for active leg prostheses
… an intent recognition method based on a hybrid discrete-continuous physical model of human walking. This method is evaluated for accuracy and robustness for real-time use.
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Forecasting 65+ travel : an integration of cohort analysis and travel demand modeling
… Surveys (NPTS) are used to estimate discrete and joint discrete/continuous demand models. Multiple imputation is used to impute missing survey data. Iterative proportional fitting is used to simulate future populations for forecasting purposes. Although 65+ travel is predicted to …
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Robust execution for stochastic hybrid systems
… that reasons explicitly from a stochastic hybrid discrete-continuous system model to find the optimal course of action, while ensuring the required level of robustness to uncertainty is achieved. Our first contribution is a novel 'Particle Control' approach for robust execution of state plans with …
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Modal Analysis of General Cyclically Symmetric Systems with Applications to Multi-Stage Structures
… group-theory-based method, and it applies to discrete, continuous, or hybrid discrete-continuous cyclically symmetric systems. The group-theory-based modal analysis also applies to systems with other symmetry types. The group-theory-based modal analysis is generalized to analyze the …
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Automated Telescience: Active Machine Learning Of Remote Dynamical Systems
… of dynamical systems: a method to infer discrete-continuous hybrid dynamical systems from unlabeled data, an approach to discovering ordinary differential equations of arbitrary order, and a principle to uncover the existence and dynamics of hidden state variables that correspond to …
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