检索结果-南通市图书馆

Dynamic information theory and information description of dynamic systems

Science china(Physics,Mechanics & Astronomy) 2010年第4期53卷 607-627页

作者： xing xiusan Department of Physics, beijing institute of technology,{2. 100081, china 1. Department of Physics Beijing Institute of Technology Beijing 100081 China

In this paper, we develop dynamic statistical information theory established by the author. Starting from the ideas that the state variable evolution equations of stochastic dynamic systems, classical and quantum nonequilibrium statistical physical systems and special electromagnetic field systems can be regarded as their information symbol evolution equations and the definitions of dynamic information and dynamic entropy, we derive the evolution equations of dynamic information and dynamic entropy that describe the evolution laws of dynamic information. These four kinds of evolution equations are of the same mathematical type. They show in unison when information transmits in coordinate space outside the systems that the time rate of change of dynamic information densities originates from their drift, diffusion and dissipation in state variable space inside the systems and coordinate space in the transmission processes, and that the time rate of change of dynamic entropy densities is caused by their drift, diffusion and production in state variable space inside the systems and coordinate space in the transmission processes. When space noise can be neglected, an information wave will appear. If we only consider the information change inside the systems, dynamic information evolution equations reduce to information equations corresponding to the dynamic equations which describe evolution laws of the above dynamic systems. This reveals that the evolution laws of respective dynamic systems can be described by information equations in a unified fashion. Hence, the evolution processes of these dynamic systems can be abstracted as the evolution processes of information. Furthermore, we present the formulas for information flow, information dissipation rate, and entropy production rate. We prove that the information production probably emerges in a dynamic system with internal attractive interaction between the elements, and derive a formula for this information production

关键词： dynamic information evolution equation informationization of dynamic equation information wave information flow and force information dissipation and production degradation and evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On the fundamental equation of nonequilibrium statistical physics—Nonequilibrium entropy evolution equation and the formula for entropy production rate

引用

Science china(Physics,Mechanics & Astronomy) 2010年第12期53卷 2194-2215页

作者： xing xiusan Department of Physics, beijing institute of technology,{2. 100081, china 1. Department of Physics Beijing Institute of Technology Beijing 100081 China

In this paper the author presents an overview on his own research works. More than ten years ago, we proposed a new fundamental equation of nonequilibrium statistical physics in place of the present Liouville equation. That is the stochastic velocity type’s Langevin equation in 6N dimensional phase space or its equivalent Liouville diffusion equation. This equation is time-reversed asymmetrical. It shows that the form of motion of particles in statistical thermodynamic systems has the drift-diffusion duality, and the law of motion of statistical thermodynamics is expressed by a superposition of both the law of dynamics and the stochastic velocity and possesses both determinism and probability. Hence it is different from the law of motion of particles in dynamical systems. The stochastic diffusion motion of the particles is the microscopic origin of macroscopic irreversibility. Starting from this fundamental equation the BBGKY diffusion equation hierarchy, the Boltzmann collision diffusion equation, the hydrodynamic equations such as the mass drift-diffusion equation, the Navier-Stokes equation and the thermal conductivity equation have been derived and presented here. What is more important, we first constructed a nonlinear evolution equation of nonequilibrium entropy density in 6N, 6 and 3 dimensional phase space, predicted the existence of entropy diffusion. This entropy evolution equation plays a leading role in nonequilibrium entropy theory, it reveals that the time rate of change of nonequilibrium entropy density originates together from its drift, diffusion and production in space. From this evolution equation, we presented a formula for entropy production rate (i.e. the law of entropy increase) in 6N and 6 dimensional phase space, proved that internal attractive force in nonequilibrium system can result in entropy decrease while internal repulsive force leads to another entropy increase, and derived a common expression for this entropy decrease rate or anothe

关键词： stochastic velocity type’s Langevin equation in 6N dimensional phase space drift-diffusion duality nonequilibrium entropy evolution equation entropy diffusion formula for entropy production rate entropy change from internal interaction a

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

NONEQUILIBRIUM STATISTICAL FOUNDATION OF FATIGUE FRACTURE

引用

Acta Mechanica Sinica 1990年第1期6卷 35-44页

作者： xing xiusan, Department of applied Physics,{2., beijing, 100081, china 1. Department of applied Physics Beijing Institute of Technology 100081 Beijing China

The physical foundation of statistical law of fatigue fracture is discussed. The universal forms of the microcrack growth rate, fluctuation growth coefficient and distribution function and fatigue life distribution fu... 详细信息

关键词： microcrack evolution equation microscopic mechanism microcrack distribution function fatigue life distribution function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New progress in the principle of nonequilibrium statistical physics

引用

Chinese Science Bulletin 2001年第6期46卷 448-454页

作者： xing xiusanDepartment of applied Physics,{2., beijing 100081, china Department of applied Physics Beijing Institute of Technology Beijing China

In recent years, a new fundamental equation of nonequilibrium statistical physics was proposed in place of the Liouville equation. That is the anomalous Langevin equation in (?) space or its equivalent Liouville diffusion equation of time-reversal asymmetry. This equation reflects that the form of motion of particles in statistical thermody-namic systems has the drift-diffusion duality and the law of motion of statistical thermodynamics is stochastic in essence, but does not obey the Newton equation of motion, though it is also constrained by dynamics. The stochastic diffusion of the particles is the microscopic origin of macroscopic irre-versibility. Starting from this equation, the BBGKY diffusion equation hierarchy was presented, the hydrodynamic equations, such as the generalized Navier-Stokes equation, the mass drift-diffusion equation and the thermal conductivity equation have been derived succinctly. The unified description of all three level equations of microscopic, kinetic and hydrodynamic

关键词： anomalous Langevin equation in space drift-diffusion duality stochastic law nonequilibrium entropy evolution equation entropy diffusion.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cleaning of Chromate Manufacture Process

引用

International Journal of Minerals,Metallurgy and Materials 2000年第2期14卷 132-134页

作者： xing Zou Yi Zhang(applied Science School, University of Science and {2. beijing, beijing 100083, china)(institute of Engineering Chemistry and Metallurgy, Chinese Academy of Sciences, beijing 100080, china) applied Science School University of Science and Technology Beijing Beijing 100083 China institute of Engineering Chemistry and Metallurgy Chinese Academy of Sciences Beijing 100080 China

Sodium chromate solubility is determined in the range of NaOH concentrations from 450 to 810 g/L andsolution temperatUres from 30 to 110℃. The optimized conditions to separate sodium chromate from NaOH inleached solution are resolved. It is first found the method to efficiently separate sbdium chromate from NaOH andsodium altuninate in crude sodium chromate. Bench-scale studies on the separating are performed. Finally, goodseparation results are achieved.

关键词： chromate separation clean process

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A fiducial argument for generalized p-value

引用

Science china Mathematics 2007年第7期50卷 957-966页

作者： Xin-min LI~(1+) xing-zhong XU~2.Guo-ying LI~3 1 institute of {2. Mathematics,Shandong University of technology,Zibo 2.5049,china 2.Department of Mathematics,beijing institute of technology,beijing 100801,china 3 Academy of Mathematics and Systems Science,Chinese Academy of Sciences,beijing 100800,china institute of applied Mathematics Shandong University of Technology Zibo 255049 China Department of Mathematics Beijing Institute of Technology Beijing 100801 China Academy of Mathemtics Systems Science Chinese Academy of Sciences Beijing 100800 China

This paper provides a general method for constructing generalized p-value via the fiducial ***,the power properties of the generalized test are *** illustrations, the two-parameter exponential distribution and unbalan... 详细信息

关键词： fiducial distribution generalized p-value frequency property two-parameter exponential distribution variance component 62.03 62.15

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Re-assessment and Optimization of the Ga-M (M=In, Sb,Pb) Systems with Chemsage

引用

International Journal of Minerals,Metallurgy and Materials 1998年第4期12卷 212-218页

作者： Xianran xing Thiyu Qiao Herbert IPser( institute of Inorganic Chemistry, University of vienna,A-1090wien,Austria)( {2. Science School, University of Science and technology beijing, beijing 100083, china) institute of Inorganic Chemistry University of Vienna A-1090 Wien Austria applied Science School University of Science and Technology Beijing Beijing 100083 China

The thermodynamic properties and the phase diagrams of the systems Ga-M (M = In, Sb, Ph) were critically re-assessed and optimized employing the software package ChemSage for the calculation of thermodynamicequilibria. The Redlich-Kister/Margules formalism was employed for all solution phases and sets of self-consistentthermodynamic parameters were obtained. The results of re-assessment and optimization are compared with previous work, they are in excellent agreement with most experimental data.

关键词： phase diagram calculation CALPHAD method gallium-based alloy thermodynamic property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Weak Morrey spaces and strong solutions to the Navier-Stokes equations

引用

Science china Mathematics 2007年第10期50卷 1401-1417页

作者： Chang-xing MIAO~(1+) Bao-quan YUAN~2.~1 institute of {2. Physics and Computational Mathematics,P.O.Box 8009,beijing 100088,china ~2.College of Mathematics and Informatics,Henan Polytechnic University,Jiaozuo 454000,china 1. institute of applied Physics and Computational Mathematics P.O. Box 8009 Beijing 100088 China 2. College of Mathematics and Informatics Henan Polytechnic University Jiaozuo 454000 China

We consider the Cauchy problem of Navier-Stokes equations in weak Morrey *** first define a class of weak Morrey type spaces M_(p,λ)~*(R^n)on the basis of Lorentz space L_(p,∞)=L_p~*(R^n) (in particular,M_(?)~*(R^n)=L_(p,∞),if p>1),and study some fundamental properties of them;Second, we prove that the heat operator U(t)= e^(tΔ)and Calderón-Zygmund singular integral operators are bounded linear operators on weak Morrey spaces,and establish the bilinear estimate in weak Morrey ***,by means of Kato's method and the contraction mapping principle,we prove that the Cauchy problem of Navier-Stokes equations in weak Morrey spaces M_(p,λ)~*(R^n)(1

关键词： Navier-Stokes equations, weak Morrey spaces, Lorentz spaces, Cauchy problem,time-global well-posedness, self-similar solutions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

NONEQUILIBRIUM STATISTICAL THEORY OF FATIGUE FRACTURE (Ⅱ)——FROM MICROSCOPIC MECHANISM TO MACROSCOPIC PROPERTIES OF FATIGUE FRACTURE

引用

中国科学A辑(英文版) 1986年第12期29卷 1318-1333页

作者：邢修三 institute of Atomic Energy beijing

The stochastic evolution equation of microcracks is given. The microcrack density distribution function is obtained on the basis of dislocation mechanism. The fatigue fracture probability, reliability, σ_a-N curves,... 详细信息

关键词： fatigue deviation stochastic Probability dislocation quantities latter brittle hardening infinite

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

NONEQUILIBRIUM STATISTICAL THEORY OF FATIGUE FRACTURE(Ⅰ)——THE MICROSCOPIC MECHANISM AND STATISTICAL NATURE OF FATIGUE CRACK GROWTH

引用

Science in china,Ser.A 1986年第10期29卷 1051-1062页

作者：邢修三 institute of Atomic Energy beijing

In papers (Ⅰ) and (Ⅱ), we try by nonequilibrium statistical concepts and methods to construct a theory of fatigue fracture in connecting mnicroscopic mechanism with macroscopic properties. In this paper the physical picture of fatigue fracture process is described. The stochastic growth equation is given. The dislocation mechanism of growth is discussed. The transport growth rate and fluctuation growth coefficient are obtained, and thus the microcrack distribution function is derived.

关键词： NONEQUILIBRIUM STATISTICAL THEORY OF FATIGUE FRACTURE THE MICROSCOPIC MECHANISM AND STATISTICAL NATURE OF FATIGUE CRACK GROWTH length rate exp

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：