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On the 4D Variational Data Assimilation with constraint conditions

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Advances in Atmospheric Sciences 2001年第6期18卷 1131-1145页

作者：朱克云 Chengdu University of Information Technology Chengdu

An investigation is carried out on the problem involved in 4D variational data assimilation (VDA) with constraint conditions based on a finite-element shallow-water equation model. In the investigation, the adjoint technology, penalty method and augmented Lagrangian method are used in constraint optimization field to minimize the defined constraint objective functions. The results of the numerical experiments show that the optimal solutions are obtained if the functions reach the minima. VDA with constraint conditions controlling the growth of gravity oscillations is efficient to eliminate perturbation and produces optimal initial field. It seems that this method can also be applied to the problem in numerical weather prediction. Key words Variational data assimilation - constraint conditions - Penalty methods - finite-element model This research is supported by National Natural Science Foundation of China (Grant No. 49575269) and by National Key Basic Research on the Formation Mechanism and Prediction Theory of Severe Synoptic Disasters (Grant No. G1998040910).

关键词： Variational data assimilation constraint conditions Penalty methods finite-element model

Coherence destruction of tunneling in a quantum-dot molecule with bias

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Chinese Physics B 2010年第10期19卷 445-451页

作者：钟光辉王立民 Department of Physics Hebei Normal University Institute of Applied Physics and Computational Mathematics

This paper studies the constraint conditions for coherence destruction in tunneling by using perturbation theory and numerical simulation for an AC-field with bias and Coulomb interaction between electrons in a quantum dot molecule. Such conditions can be described by using the roots of a Bessel function Jn（x）, where n is determined by both the bias and the Coulomb interactions, and x is the ratio of the amplitude to the frequency of the AC-field. Under such conditions, a coherent suppression of tunneling occurs between localized electronic states, which results from the dynamical localization phenomenon. All the conditions are verified with numerical simulations.

关键词： dynamic localization Floquet state constraint conditions

constraint Stabilization and One-Step Correction Method for Dynamical Systems

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Journal of Beijing Institute of Technology 2007年第1期16卷 5-8页

作者：尚玫陈向炜梅凤翔 School of Science Beijing Institute of TechnologyBeijing 100081China Department of Physics Shangqiu Teachers CollegeShangqiu 476000 China

A computational method of constraint stabilization and correction is introduced. The method is based on the Baumgart＇s one-step method. constraint conditions are addressed to stabilize and correct the solution. Two e... 详细信息

关键词： Baumgart' s method one-step method constraint conditions

The target solution's analysis of University Course Scheduling System

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The target solution's analysis of University Course Scheduli...

2011年全国电子信息技术与应用学术会议

作者： 1 Chu dong,2 Fu wei 1 Network Information Center,Hunan University of Science and Technology,Xiangtan411201,China 2 Network Information Center,Hunan University of Science and Technology,Xiangtan411201,China

Curriculum arrangement is a very important and heavy work,it involves dozens or even hundreds of profession,hundreds of courses,hundreds of teachers’ reasonable ***,the limited resources of the classroom,laboratory,computer room increase the difficulty of curriculum *** the whole process of curriculum arrangement,it is full of conflict from beginning to *** article studies on the business process of the existing arrangement system of Hunan university of science and *** on the teaching resources and the analysis of the constraint condition,this article puts forward the arrangement system combination explosion and *** fact,the arrangement system is the process of utilization of teaching resources,teachers,classes,courses,classrooms,and time,then get the schedule.

关键词： Curriculum constraint conditions Combinatorial optimization Conflict processing

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涉案企业合规改革的政策目标及其实现

诉讼法学、司法制度 2023年第12期

作者：时延安

继续推进涉案企业合规改革，需要重新思考其所依循的政策目标，认真研究落实改革目标过程中存在分歧的原因，进一步凝聚共识，将改革目标及实现过程融入完善社会主义市场经济、健全社会主义法治和大力推进中国式现代化建设的进程当中。... 详细信息

继续推进涉案企业合规改革，需要重新思考其所依循的政策目标，认真研究落实改革目标过程中存在分歧的原因，进一步凝聚共识，将改革目标及实现过程融入完善社会主义市场经济、健全社会主义法治和大力推进中国式现代化建设的进程当中。在推进这场改革的过程中，要客观而准确地理解各种约束条件的制衡作用，将非基本性的制约因素作为改革的对象。在改革的路径选择上，应坚持符合职权属性原则、实体与程序一致原则和一体性原则，在具体制度和机制设计上能够得到充分的理论支持且具有实践上的可行性。

关键词：合规改革政策目标约束条件路径选择 Reform of Compliance Policy Objective constraint conditions Choice of Approaches

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