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 62 for “"Penalty function"”.
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Numerical analysis of subcritical open channel flow by the penalty function finite element method
… dispersion terms. In the present study, the penalty function finite element technique is utilized to solve the governing hydrodynamic and turbulence model equations for a variety of flow domains. Alternative momentum dispersion and turbulence closure models are proposed and evaluated by …
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An updating rule for the penalty constant used in the penalty function method for mathematical programming problems
This thesis considers the problem of minimizing a function f(x) subject to a constraint cp(x) = 0, where f is a scalar quantity, x an n-vector, and cp a q-vector, with q being less than n. The penalty function method is investigated; that is, the vector x is viewed as unconstrained, and the …
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Optimization of steel frames via penalty functions
… to minimize the weight of steel frames using a penalty function technique. The program is developed and several example problems are analyzed. All structures are designed in accordance with the AISC code. One of the problems is also analyzed by the Fully Stressed Design method, and the penalty …
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A beam pattern design procedure for multidimensional sonar arrays employing minimum variance beamforming
… The procedure is implemented by generating a "penalty function" in a spectral covariance function form. Processing the penalty function causes beam pattern high sidelobes to be penalized and the main lobe to be emphasized. This is accomplished by forming the penalty function in terms of an …
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A Penalty-Based Approach to Handling Cluster Sizing in Mobile Ad Hoc Networks
… handled insufficiently. This Thesis proposes a penalty-based approach to handle cluster sizing in a more appropriate manner. A configurable penalty function is defined which assigns penalties to each of the possible cluster sizes. The penalty is then used in conjunction with a merge qualifier to …
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The Use of Probabilistic Risk Functions and Linear Penalty Functions for Hospital Evacuation Planning
… duration minimization, manipulations of the risk functions for the risk minimization approach were searched in this thesis such that the resulting evacuation plans approach the minimal duration without rules for the assignments of patients to vehicle types. It is possible to create risk functions …
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Computational Solution Of Inverse Problems With Simulated Annealing
… allows one to reformulate inverse problems as a function minimization involving the associated forward problem. The function to minimize is known as a penalty function or cost function and is defined as the least squares difference between some measured quantity and a quantity computed by the …
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Tracking with constraints in a web of sensors
… a method for taking walls into account using a penalty function in an ongoing research project in trajectory tracking model. There were two deployed sensor networks, one with distance sensors and one with cameras, and the camera network was used to collect data for the two papers. The trajectory …
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Numerical method for solving fluid flow and heat transfer equations by design optimization
… an optimization program based on an exterior penalty function method to solve the partial differential equations. The intent of the investigation is to show that the method is feasible so that the entire design process can be incorporated into an optimization algorithm. Three problems are …
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Genetic Algorithm-Based Methodology for Unstructured Design of Truss Structures
… decoded from strings; a new generalized penalty function is developed that is able to handle many different kinds of design constraints; and a new fitness functions is developed that is able to handle various kinds of design objectives. The methodology is implemented as a software …
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Efficient capacity allocation in a collaborative air transportation system
… of modifying the subproblem objectives through a penalty function determined by a master "dual" problem, is employed in the Objective-Based Allocation Method (OBAM). It is shown that the proper choice of penalty function results in a method that performs well dynamically and, assuming each user …
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Variable Selection for DNA Methylation Data Using Model-Based Clustering
… approach featured the use of clustering with a penalty function to select informative variables. We evaluated the method by conducting simulations for a variety of scenarios. For clustering, we evaluated sensitivity and specificity, and for variable selection, we evaluated the percentages of …
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System reliability optimization of aircraft wings
… system failure probability, is circumvented if a penalty function method is used for optimization.
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Exterior Penalty Approaches for Solving Linear Programming Problems
In this research effort, we study three exterior penalty function approaches for solving linear programming problems. These methods are an active set l2 penalty approach (ASL2), an inequality-equality based l2 penalty approach (IEL2), and an augmented Lagrangian approach (ALAG). Particular …
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Changepoint detection for acoustic sensing signals
… approximation and allows for a non-linear penalty function. This procedure is subsequently used to detect changes in acoustic sensing data which correspond to external disturbances of the measuring cable. The second part shifts focus to multivariate time series, and considers the detection …
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Lagrangian Relaxation / Dual Approaches For Solving Large-Scale Linear Programming Problems
… a dual ascent, a primal recovery, and a penalty function approach to recover a near optimal and feasible pair of primal and dual solutions. The proposed primal-dual approach is comprised of three stages. Stage I deals with solving the Lagrangian dual problem by using various subgradient …
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Design optimisation of steel portal frames using modified distributed genetic algorithms
… adding a crossover scheme, definition of a penalty function, properties of twins, and definition of the reproduction scheme. Many optimisation problems have been designed to minimise the weight of a steel structure and are well documented in the literature. However, having a frame controlled …
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A penalty finite element model for axisymmetric flows of power-law and white-metzner fluids
A finite element model based on the penalty function formulation of the equations governing unsteady axisymmetric flows of viscous incompressible fluids obeying power-law and White-Metzner constitutive relations is developed. The formulation accounts for inertial (or convective) terms. For …
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A constrained MDP-based vertical handoff decision algorithm for wireless networks
… access cost constraint. In our model, a benefit function is used to assess the quality of the connection, and a penalty function is used to model the signaling incurred and call dropping. The user's velocity and location information are also considered when making the handoff decisions. The …
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