检索结果-南通市图书馆

On the stability of diffusion processes with state-dependent switching

在线全文

学校读者我要写书评

暂无评论

Science China mathematics 2006年第9期49卷 1258-1274页

作者： xi fubao & ZHAO Liqin department of {3.,{3., beijing 100081, China School of Mathematical Sciences, beijing Normal University, beijing 100875, China department of mathematics Beijing Institute of Technology Beijing 100081 China School of Mathematical Sciences Beijing Normal University Beijing 100875 China

In this paper we consider the stability for diffusion processes with state-dependent switching. We first prove their Feller continuity by the coupling methods. Furthermore, we also prove their strong Feller continuity and their exponential ergodicity under some reasonable conditions. Finally, we append a very brief discussion about the regularity of these processes.

关键词： Feller continuity, coupling, strong Feller continuity, exponential ergodicity,state-dependent switching.

Invariant Measures for a Random Evolution Equation with Small Perturbations

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2001年第4期17卷 631-642页

作者： Fu Bao xi department of Applied mathematics,{3.,{3., P. R. China department of Applied mathematics Beijing Institute of Technology Beijing 100081 P. R. China

In this paper we consider a random evolution equation with small perturbations, and show how to construct coupled solutions to the equation. As applications, we prove the Feller continuity of the solutions and the existence and uniqueness of invariant measures. Furthermore, we establish a large deviations principle for the family of invariant measures as the perturbations tend to zero.

关键词： Invariant measures Large deviations Coupling Random evolution equation

Small Random Perturbations of One-Dimensional Diffusion Processes

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 1998年第1期14卷 35-40页

作者： xi fubao department of Applied {3.,{3., beijing 100081, China

In the present paper we consider the small random perturbations of one-dimensional diffosion processes. By virtue of stochastic analysis methods, we investigate the asymptotics of the mean exit times and probabilistic... 详细信息

关键词： Diffusion processes Small random perturbations Exit times

In situ Simulation of Thermal Reality

在线全文

学校读者我要写书评

暂无评论

Research 2024年第2期2023卷 685-690页

作者： Peng Jin Jinrong Liu fubao Yang Fabio Marchesoni Jian-Hua Jiang Jiping Huang department of Physics State Key Laboratory of Surface Physicsand Key Laboratory of Micro and Nano Photonic Structures(MOE)Fudan UniversityShanghai 200438China Center for Phononics and Thermal Energy Science Shanghai Key Laboratory of Special Artificial Microstructure Materials and TechnologySchool of Physics Science and EngineeringTongji UniversityShanghai 200092China department of Physics University of CamerinoCamerino 62032Italy Suzhou institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China

Simulated reality encompasses virtual,augmented,and mixed realities梕ach characterized by different degrees of truthfulness in the visual perception:"all false","coexistence of true and false,"and"difficult distinction between true and false,"*** all these technologies,however,the temperature rendering of virtual objects is still an unsolved ***,the lack of thermal tactile functions substantially reduces the quality of the user's real-experience *** address this challenge,we propose theoretically and realize experimentally a technological platform for the in situ simulation of thermal *** this purpose,we design a thermal metadevice consisting of a reconfigurable array of radiating units,capable of generating the thermal image of any virtual object,and thus rendering it in situ together with its thermal *** is a substantial technological advance,which opens up new possibilities for simulated reality and its applications to human activities.

关键词： false rendering signature

STATIONARY SOLUTION FOR A STOCHASTIC LINARD EQUATION WITH MARKOVIAN SWITCHING

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2005年第1期25卷 95-104页

作者：席福宝赵丽琴 department of mathematics beijing institute of technology Beijing 100081 China department of mathematics beijing Normal University Beijing 100875 China

This paper considers a stochastic Lienard equation with Markovian switching. The Feller continuity of its solution is proved by the coupling method and a truncation argument. The existence of a stationary solution for... 详细信息

关键词： Coupling truncation feller continuity stationary solution

The Hausdorff Dimension of Sections

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of mathematics,Series B 2007年第2期28卷 187-194页

作者： Min NIU Lifeng xi department of mathematics and Mechanics Beijing University of Science and Technology Beijing 100083China institute of mathematics Zhejimag Wanli University Ningbo 315100 Zhejiang China

The notion of finite-type open set condition is defined to calculate the Hausdorff dimensions of the sections of some self-similar sets, such as the dimension of intersection of the Koch curve and the line x=α with ... 详细信息

关键词： Hausdorff dimension Self-similar set Section Open set condition

Multi-objective robust control based on fuzzy singularly perturbed models for hypersonic vehicles

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2011年第3期54卷 563-576页

作者： HU YeNan 1 , YUAN Yuan 2 , MIN HaiBo 2,3.& SUN FuChun 1 1 department of Computer Science and technology, Tsinghua University, beijing 100084, China 2 department of Automation, xi’an Research institute of High-Tech, xi’an, Shaanxi 710025, China 3.beijing institute of Astronautical System Engineering, beijing 100076, China 1. department of Computer Science and technology Tsinghua University Beijing 100084 China2. Department of Automation Xi’an Research Institute of High-Tech Xi’an Shaanxi 710025 China3. Beijing Institute of Astronautical System Engineering Beijing 100076 China

In this paper, we propose a multi-objective robust controller based on fuzzy singularly perturbed models (FSPM) for the longitudinal motion of an air-breathing hypersonic vehicle. The control objective is to provide velocity and altitude tracking in the presence of the uncertainties and unknown nonlinearities in the model caused by variations in flight conditions. By approximating the multi-time-scale model with FSPM, ill-posed matrix calculations are circumvented. Under this framework, a fuzzy multi-objective robust controller is developed, and the linear matrix inequalities (LMI) condition is derived. Numerical simulation using the longitudinal model of a hypersonic aircraft is provided to demonstrate the effectiveness of the proposed strategy.

关键词： FSPM multi-objective robust control intelligent control hypersonic vehicle

A review of the neurotransmitter system associated with cognitive function of the cerebellum in Parkinson's disease

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第2期19卷 324-330页

作者： xi Chen Yuhu Zhang department of Neurology Guangdong Neuroscience InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina

The dichotomized brain system is a concept that was generalized from the‘dual syndrome hypothesis’to explain the heterogeneity of cognitive impairment,in which anterior and posterior brain systems are independent but partially *** dopaminergic system acts on the anterior brain and is responsible for executive function,working memory,and *** contrast,the cholinergic system acts on the posterior brain and is responsible for semantic fluency and visuospatial *** from dopaminergic/cholinergic imaging or functional neuroimaging has shed significant insight relating to the involvement of the cerebellum in the cognitive process of patients with Parkinson’s *** research has reported evidence that the cerebellum receives both dopaminergic and cholinergic ***,whether these two neurotransmitter systems are associated with cognitive function has yet to be fully ***,the precise role of the cerebellum in patients with Parkinson’s disease and cognitive impairment remains ***,in this review,we summarize the cerebellar dopaminergic and cholinergic projections and their relationships with cognition,as reported by previous studies,and investigated the role of the cerebellum in patients with Parkinson’s disease and cognitive impairment,as determined by functional *** findings will help us to understand the role of the cerebellum in the mechanisms underlying cognitive impairment in Parkinson’s disease.

关键词： anterior brain system cerebellum cholinergic cognitive impairment dopaminergic dual syndrome hypothesis neuroimage neurotransmitter Parkinson’s disease posterior brain system therapeutic targets

Spatiotempora　lcomplexity　of　the　Cubic　Ginzburg－Landau　Equation

在线全文

学校读者我要写书评

暂无评论

Communications in Nonlinear Science and Numerical Simulation 1996年第4期1卷 14-19页

作者： Boling GUO, Zhujung JING  & Bainian LU  (Center for Nonlinear Studies, institute of Applied Physicsand Computational mathematics, beijing100088)  (institute of mathematics, Academia Sinica, beijing100080)  (department of Center for Nonlinear Studies Institute of Applied Physics and Computational Mathematics Beijing 100088 China institute of mathematics Academia Sinica Beijing 100080 China department of mathematics Shaanxi Normal University Xi'an 710062 Shaanxi China

ＳｐａｔｉｏｔｅｍｐｏｒａｌｃｏｍｐｌｅｘｉｔｙｏｆｔｈｅＣｕｂｉｃＧｉｎｚｂｕｒｇ－ＬａｎｄａｕＥｑｕａｔｉｏｎ１，２１ＰｒｏｊｅｃｔｓｕｐｐｏｒｔｅｄｂｙｔｈｅＮａｔｉｏｎａｌＳｃｉｅｎｃｅＦｏｕｎｄａｔｉｏｎｏ... 详细信息

ＳｐａｔｉｏｔｅｍｐｏｒａｌｃｏｍｐｌｅｘｉｔｙｏｆｔｈｅＣｕｂｉｃＧｉｎｚｂｕｒｇ－ＬａｎｄａｕＥｑｕａｔｉｏｎ１，２１ＰｒｏｊｅｃｔｓｕｐｐｏｒｔｅｄｂｙｔｈｅＮａｔｉｏｎａｌＳｃｉｅｎｃｅＦｏｕｎｄａｔｉｏｎｏｆＣｈｉｎａａｎｄｔｈｅＣｏｍｍｉ...

关键词： Ginzburg-Landau equation Pesudo-spectral Methods Bifurcation Chaos