نتایج جستجو برای: numerical control

تعداد نتایج: 1631270  

Journal: :J. Visualization 2008
Ryota Tsubaki Yasuki Nakayama Ichiro Fujita

The purpose of this study is to investigate the characteristics of the flow through the Jonangu channel which is used for ceremonial game called as ‘Kyokusui-no-En’ in Japanese. The geometry of the channel is measured, a visualization technique is used to measure the actual flow characteristics, and then a numerical flow model is used to represent the flow including unsteady flow characteristic...

Journal: :Comp. Opt. and Appl. 2012
Michael McAsey Libin Mou Weimin Han

The Forward-Backward Sweep Method is a numerical technique for solving optimal control problems. The technique is reviewed and a convergence theorem is proved for a basic type of optimal control problem. Examples illustrate the performance of the method.

Journal: :J. Economic Theory 2011
Min Dai Hanqing Jin Hong Liu

We study the optimal trading strategy of mutual funds that face both position limits and differential illiquidity. We provide explicit characterization of the optimal trading strategy and conduct an extensive analytical and numerical analysis of the optimal trading strategy. We show that the optimal trading boundaries are increasing in both the lower and the upper position limits. We find that ...

1992
Paul Van Dooren

We discuss a number of novel issues in the interdisciplinary area of numerical linear algebra and systems and control theory. Although we do not claim to be exhaustive we give a number of \upcoming issues" which we believe will play an important role in the near future. These are : sparse matrices, structured matrices, novel matrix decompositions and numerical shortcuts. Each of those is presen...

Journal: :IEEE Trans. Automat. Contr. 2000
Shan Sun Magnus Egerstedt Clyde F. Martin

In this paper some of the relationships between optimal control and statistics are examined. We produce generalized, smoothing splines by solving an optimal control problem for linear control systems, minimizing the -norm of the control signal, while driving the scalar output of the control system close to given, prespecified interpolation points. We then prove a convergence result for the smoo...

Journal: :فیزیک زمین و فضا 0
سرمد قادر دانشیار، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران علیرضا محب الحجه دانشیار، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران مرضیه شریفی دوست دانش آموخته کارشناسی ارشد هواشناسی، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران

to control the nonlinear numerical instability, throughout the time evolution of the eulerian form of the nonlinear rotating shallow water equations, it is necessary to add numerical diffusion to the solution. it is clear that, this extra numerical diffusion degrades the accuracy of the numerical solution and should be kept as small as possible. in a conventional approach a hyper-diffusion is u...

2009
Xi Liu Yanping Lin Horacio J. Marquez Henry Van Roessel Farbod Fahimi Panos J. Antsaklis

This thesis is concerned with the analysis of the control design to the nonlinear networked control systems (NCSs). Ignoring the network connection and cascading actuators, the plant and sensors together, a sampled-data system is obtained. The stabilization problem of nonlinear sampled-data systems is considered under the low measurement rate constraint. Dual-rate control schemes based on the e...

ژورنال: رویش روانشناسی 2020

The purpose of this study was to determine the effectiveness of cognitive and metacognitive strategies training on improving the memory function (coding, numerical memory), study speed and comprehension. Research method was of quasi-experimental type with pre-test, post-test, follow up design with control group. The statistical population of the study was consisted of all young people aged 20 t...

A. Ramezanpour, F. Soltanian J. Vahidi, P. Reihani

In this article, Ritz approximation have been employed to obtain the numerical solutions of a class of the fractional optimal control problems based on the Caputo fractional derivative. Using polynomial basis functions, we obtain a system of nonlinear algebraic equations. This nonlinear system of equation is solved and the coefficients of basis polynomial are derived. The convergence of the num...

2017
Jiamin Zhu Emmanuel Trélat Max Cerf

This article deals with applications of optimal control to aerospace problems with a focus on modern geometric optimal control tools and numerical continuation techniques. Geometric optimal control is a theory combining optimal control with various concepts of differential geometry. The ultimate objective is to derive optimal synthesis results for general classes of control systems. Continuatio...

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