In this paper, we present a general method for rank-constrained optimization. We use an iterative convex optimization procedure where it is possible to include any extra convex constraints. The proposed approach has potential application in several areas. We focus on the problem of Factor Analysis. In this case, our approach provides sufficient flexibility to handle correlated errors. The benef...

The search for the temperature disturbance causing transition between regular and Mach reflections in a dual solution domain is addressed in an optimization statement. The gradient of the discrepancy between the current and target flow fields was calculated using the adjoint equations. The control was determined by a gradient based optimization. The flowfield simulation is verified via a poster...

in this paper, we introduce a hybrid approach based on neural network and optimization teqnique to solve ordinary differential equation. in proposed model we use heyperbolic secont transformation function in hiden layer of neural network part and bfgs teqnique in optimization part. in comparison with existing similar neural networks proposed model provides solutions with high accuracy. numerica...

This report introduces the “Time Stepping Package for Optimization”, or TSOpt, which is an interface for time-stepping simulation written in C++. It packages a simulator together with its derivatives (“sensitivities”) and adjoint derivatives with respect to simulation parameters in a single object called a Jet, which can be used in conjunction with an optimization algorithm to solve a simulatio...

Many assistive robotic devices have been developed to augment or assist human locomotion. Despite advancements in design and control algorithms, this task remains challenging. Human walking strategies are unique complex, assistance based on the dynamics of unassisted locomotion typically offer only modest reductions metabolic cost walking. Recently, human-in-the-loop (HIL) methodologies used id...

Title of dissertation: SIMULATION OPTIMIZATION OF TRAFFIC LIGHT SIGNAL TIMINGS VIA PERTURBATION ANALYSIS William Casey Howell, Doctor of Philosophy, 2006 Dissertation directed by: Professor Michael C. Fu Applied Mathematics and Scientific Computation Program We develop simulation optimization algorithms for determining the traffic light signal timings for an isolated intersection and a network ...

abstract icssdom is a mathematical synthetic model that was written with fortran77 and in which used sa simulation annealing algorithm like an internal loop in basic structure of icss hydrodynamic simulation model. this model presented by mohseni movahed in 1381. this model is able assess current performance and present optimal operation considering downstream requirement of turnout in real con...

The aeration process via injectors is used to combat the lack of oxygen in lakes due to eutrophication. A 3D numerical simulation of the resulting flow using a simplified model is presented. In order to generate the best dynamic in the fluid with respect to the aeration purpose, the optimization of the injectors location is considered. We propose to adapt to this problem the topological sensiti...