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 24 for “"Nonlinear Program"”.
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Three-dimensional finite-element analysis including elastic-plastic material response
The development of a linear finite-element program using an isoparametric 60-DOF hexahedron is presented. As a special feature dictated by programming considerations, the enforcement of boundary conditions and the modification of the stiffness matrix due to a rotated coordinate system for selected …
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Hybrid System Identification of Manual Tracking Submovements in Parkinson's Disease
… based on embedding to solve a constrained nonlinear program. We also use the existing geometric approach for hybrid system identification to analyze our model and explain the deficits and advantages of each. These methods are applied to data gathered from subjects with Parkinson's disease …
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Simultaneous Modeling and Optimization of a Cascade of Electrochemical Reactors
… into consideration. The system includes both nonlinear algebraic and differential equations. An orthogonal collocation technique was used to approximate the differential equation. An efficient and reliable nonlinear equation solver based on a modification of Powell's dogleg method called NEQLU …
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Strategic capacity planning using data science, optimization, and machine learning
… throughout the factory. Finally, a mixed-integer nonlinear program (MINLP) integrates the capacity utilization framework and machine learning predictions to compute the optimal strategic capacity planning decisions. Capacity utilization and OEE models are shown to be able to be generated through …
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Optimal Allocation of STATCOMs and Wind-Based Distributed Generators using a Stochastic Mathematical Program
… proposed optimization model is a mixed-integer nonlinear program (MINLP), which simultaneously allocates STATCOMs and W-DGs. It minimizes the costs of power losses, investment, operation, and maintenance while maximizing the CO2 reduction rewards and power generation revenues. The Canadian …
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Effector Shape and Motion Optimization
… shape and motion design problem as a tractable nonlinear program. This method is particularly useful for problems where the shape of the effector surface must be precisely chosen to achieve a task. This work is then extended to parallel-jaw grasping problems, in which grasp stability is …
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Methods for Kinematic Analysis and Optimization of Overactuated Serial and Parallel Structures
… solvers as used as initial conditions for a Nonlinear Program (NLP) algorithm which optimizes the internal configuration of a SP-Stack such that the end effector (EE) plate remains at the desired location, and the maximal force experienced on any actuator is minimized. The second work …
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Mixed-integer convex optimization for planning aggressive motions of legged robots over rough terrain
… this insight, I formulate a pair of mathematical programs for planning highly dynamic motions for legged robots. The first is a mixed-integer convex program, specifically, a mixed-integer quadratic program (MIQP), that yields a sequence of footholds/handholds as well as center of mass (COM) and …
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On control and optimization of cascading phenomena in a class of dynamic networks
… We start by developing a mixed-integer linear programming (MILP) formulation for tracking the redistribution of direct current (DC) flows and the graph-theoretic evolution of network topology over the course of cascading failures. Next, we propose a min-max setup for studying the impact of …
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Network disaster recovery via dynamic service-aware risk management
… conditions as a multi-objective mixed-integer nonlinear program (MINLP). The model jointly optimizes five objectives: maximizing revenue and survivability, while minimizing service-aware risk, overutilization cost, and SLA penalties, subject to capacity and service-level constraints. A dynamic …
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Computational Multi-material Inverse Design of Soft Robotic Actuators via Nonlinear Functional Optimization
… then solves an inverse problem in design using nonlinear optimization subject to physics constraints. The nonlinear program is solved using a gradient-based interior-point method. Analytical gradients are computed for efficiency. The method outputs fields of material properties, at the level of …
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Optimal control and model reduction for wave energy systems: A moment-based approach
… tailored for WEC systems, addressing linear and nonlinear model reduction cases, providing a systematic method to compute control-oriented models from complex target structures. These approximating models inherit steady-state response characteristics of the target system, via the proposed …
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Nonsmooth dynamic optimization of systems with varying structure
… dynamic optimization problem into an nonlinear program by parameterizing the controls. Unlike the state of the art, the method does not enumerate possible structures explicitly in the optimization and it does not depend on the discretization of the dynamics. Instead, it uses a special …
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Linear Power Discretization and Nonlinear Formulations for Optimizing Hydropower in a Pumped Storage System
… owners. Two formulations are presented: (1) a nonlinear mixed integer program and (2) a discretized linear mixed integer program. These formulations optimize the operating procedure to generate maximum revenue from the facility. Both formulations are general and are applicable to any pumped …
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Reduction of Average Cycle Time at a Wafer Fabrication Facility
… The second methodology is based on mathematical programming. For the first methodology, the manufacturing system is simulated using AutoSchedAP, which is part of the AutoSimulations Inc. software package. The software enables the accurate modeling of the existing system using actual part routes, …
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Optimally Locating Facilities with Variable Characteristics
… We formulate the first one as a mixed-integer nonlinear programming problem and propose three methods for its solution: a Lagrangean heuristic, a branch-and-bound method with Lagrangean relaxation, and a branch-and-bound method with nonlinear programming relaxation. The computational results …
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Certifiably correct SLAM
… (MLE) that requires solving a nonconvex nonlinear program, which is computationally hard. Current state-of-the-art SLAM algorithms address this difficulty by applying fast local optimization methods to compute a critical point of the MLE. While this approach has enabled significant …
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WZ-speed harmonizer: an optimized active traffic and demand management system with speed harmonization for work zones
… because it is a large scale Mixed Integer Nonlinear Program (MINLP). Determining traffic speed and extend of queue is critical to develop a speed harmonization scheme to mitigate congestion. Past studies have used first order model or second order model as a constraint in the optimization …
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Game theoretic analysis and design for network security
… algorithm when the game is zero-sum and using a nonlinear program in the general case when the game is nonzero-sum. The solutions provide the players with the optimal stationary strategies at each state of the network and the overall payoffs of the game. Numerical examples are presented to …
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Optimal design and operation of energy polygeneration systems
… potentially large-scale nonconvex mixed-integer nonlinear program (MINLP) and cannot be solved to global optimality by state-of-the-art global optimization solvers, such as BARON, within a reasonable time. The nonconvex generalized Benders decomposition (NGBD) method can exploit the special …
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