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.
Results
Showing 1 to 19 of 19 for “"Parameter estimation algorithm"”.
-
Parameter estimation in reconstructing temperature fields during hyperthermia.
In this dissertation, a state and parameter estimation algorithm is implemented and modified to predict the blood perfusions and thus the complete steady-state temperature fields based on input from a limited number of temperature measurements taken during simulated hyperthermia treatments. Several …
-
Thermal characterization of honeycomb core sandwich structures
… behind this research. The thermal property estimation approach used here involves the minimization of a least-squares function containing both measured and calculated values. In addition, an applied heat flux is necessary at one boundary for the simultaneous estimation of thermal properties. …
-
Improved Techniques for Statistical Analysis of the Envelope of Backscattered Ultrasound Using the Homodyned K Distribution
… of backscattered ultrasound. An efficient parameter estimation algorithm was developed and tested through simulations and experiments. Techniques to reduce estimate bias and variance were assessed. The diagnostic potential of tissue characterization based on envelope statistics was …
-
Protection of synchronous generators and induction generators
… function, which is named EBP (dynamic state Estimation Based Protection) that can protect the synchronous generators and induction generators securely and dependably when they have internal faults. Specifically, the EBP function monitors the consistency between the generator measurements and …
-
Semantic modeling of the natural language of Wikipedia annotations
… bag-of-entities): we hypothesize that the parameters of the model satisfy a geometric symmetry property (isotropy). We show that the isotropy property leads to self-normalization allowing for the design of an efficient parameter estimation algorithm that we christen wiki2vec. The …
-
Latent tree structure learning for cross-document coreference resolution
… ideas to provide a new model for CDCR. To learn parameters, we implement a parameter estimation algorithm based on existing stochastic gradient-descent based algorithms and show how to further tune regularization parameters. The latent tree structure is then learned using MCMC inference. We show …
-
Real-Time Ground Vehicle Parameter Estimation and System Identification for Improved Stability Controllers
… research in and modeling of vehicle dynamics and parameter estimation. Parameter estimation is a challenging problem. Many different elements play into the stability of a parameter estimation algorithm. The primary trade-off is robustness for accuracy. Lyapunov estimation techniques, for instance, …
-
Computational Scientific Discovery Using Rate-Based Process Models
… the idea of using linear regression to estimate parameter values instead of gradient descent. The regression-based parameter estimation algorithm is implemented into a system called Regression-guided Process Modeller (RPM) that is tested on both empirical and synthetic data. Results from testing …
-
Algebraic theory for discrete models in systems biology
… computational engine for model construction, parameter estimation, and analysis methods. Formal definitions and theorems for PDS and the concept of PDS as models of biological systems are introduced in section 1.3. Constructing a model for given time-course data is a challenging problem. …
-
Observer-Based Simultaneous States and Parameters Estimation Method with Application to System Heath Monitoring
Joint state and parameter estimation is paramount in many engineering and scientific fields, as it involves determining the internal states of a system and the estimation of its time-varying / unknown parameters simultaneously. This twin estimation aspect is crucial for real-time system monitoring, …
-
Multi-dimensional Channel Parameter Estimation for mmWave Cylindrical Arrays
… networks, have the potential to estimate channel parameters with unprecedented accuracy, due to their high temporal resolution and excellent directivity. However, most existing techniques have very high complexities in hardware and software, and they cannot effectively exploit the properties of …
-
Estimating The Thermal Properties Of Thin Film And Multilayer Structures Using Photothermal Deflection Spectroscopy
… probe beam deflections. A maximum a posteriori parameter estimation algorithm has been developed which allows for the determination of model parameters from experimental PDS measurements. This algorithm has the capability of accounting for a priori parameter information in the event that it may …
-
Adaptive Quaternion Control for a Miniature Tailsitter UAV
… conventional attitude representation arise in estimation and control as the system departs from level flight conditions. Furthermore, changing dynamics and limitations in modeling and sensing give rise to significant attitude control design challenges. Restrictions in computation also result …
-
Parameter estimation for unsaturated flow models
The estimation of parameters in models for soil unsaturated hydraulic properties from transient flow experiments via inversion of the governing initial-boundary value problem is examined. Emphasis is on the estimation of parameters from in-situ experiments where available data are in the form of …
-
Composition structures for system representation
This thesis discusses parameter estimation algorithms for a number of structures for system representation that can be interpreted as different types of composition. We refer to the term composition as the systematic replacement of elements in an object by other object modules, where the objects …
-
Extended many-facet Rasch models: Accounting for rater effects in automated essay scoring systems
… models for capturing rater severity and novel estimation algorithm: • Novel extended MFRM forms capable of identifying and accounting for a range of non-uniform rater behaviours. • A novel Rasch estimation algorithm which builds on previous non-iterative conditional approaches to Rasch …
-
Retrieval of atmospheric properties of extrasolar planets
… in order to cover the large range of allowed parameter space. In order to run such a large number of models, we have developed a parametric pressure-temperature (P-T) profile coupled with line-by-line radiative transfer, hydrostatic equilibrium, and energy balance, along with prescriptions for …
-
Contributions to Structured Variable Selection Towards Enhancing Model Interpretation and Computation Efficiency
… considers modeling the functional coefficient parameter as piecewise constant functions. Specifically, under the penalized regression framework, the fused lasso penalty is adopted for detecting the changes in the dynamic coefficients. The group lasso penalty is applied to enable a sparse …
-
Efficient algorithms for distributed learning, optimization and belief systems over networks
… put into the design of efficient distributed algorithms that take into account the communication constraints and make coordinated decisions in a fully distributed manner. In this dissertation, we focus on the principled design and analysis of distributed algorithms for optimization, learning …