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On diffusions induced by thermal defects in crystals the transition probability P_(E_1) of the thermal defects over potential barrier E_1 escaping from one position to another is simply regarded as P_(E_1) = e~(-E_1/kT) in all references of the solid state physics. On the basis of statistical distribution, this paper discusses the transition probability of the thermal defects. It is show that value of the diffusion coefficient is greater than that obtained from the above references in more than one order of...

On diffusions induced by thermal defects in crystals the transition probability P_(E_1) of the thermal defects over potential barrier E_1 escaping from one position to another is simply regarded as P_(E_1) = e~(-E_1/kT) in all references of the solid state physics. On the basis of statistical distribution, this paper discusses the transition probability of the thermal defects. It is show that value of the diffusion coefficient is greater than that obtained from the above references in more than one order of magnitude. The correct way for studying quantively the transition probability of thermal defects in crystals is proposed.

很多固体物理文献,对热缺陷引起扩散均简单认为热缺陷从一个位置越过势垒E_1的几率P_(E1)=e~((-E_1)/kT.本文根据统计分布,讨论热缺陷的跃迁几率,得到的扩散系数会比上述文献有一个数量级以上的差别,并指出定量研究热缺陷跃迁几率的途径.

A systematic description of the Wess-Zumino-Witten model is presented. The sym-plectic method plays the major role in this paper and also gives the relationship between the WZW model and the Chern-Simons model,The quantum theory is obtained to give the prpjective represen-tation of the Loop group.The Gauss constraints for the connection whose curvature is only focused on several fixed points are solved.The Kohno connection and the Knizhnik-Zamolodchikov equation are derived.The holonomy representation and R-matrix...

A systematic description of the Wess-Zumino-Witten model is presented. The sym-plectic method plays the major role in this paper and also gives the relationship between the WZW model and the Chern-Simons model,The quantum theory is obtained to give the prpjective represen-tation of the Loop group.The Gauss constraints for the connection whose curvature is only focused on several fixed points are solved.The Kohno connection and the Knizhnik-Zamolodchikov equation are derived.The holonomy representation and R-matrix representation of braid group are discussed.

本文系统讨论Wess-Zumino-Witten模型,给出了WZW模型的辛理论,得到WZW模型与Chern-Simons模型的关系.并且还给出了WZW模型几何量子化理论以及圈群的投影表示.本文还研究了三种不同情况下规范场的动量矩映射,通过Marsden-Weinstein约化,得到Gauss约束;还得到kohno联络,证明了这个联络是平坦的,它的holonomy表示则给出了辫群的表示.本文内容散见於近代物理文献,从物理观点看不是新的,但是本文对WZW模型的讨论和简述在数学上是严格的。

Based on geophysical literature published abroad in 1996,this paper first describes briefly the new frontiers in the development of geophysical techniques.In the field of mineral exploration,new advances in prognosis and prospecting for ore deposits,exploration methods,and case histories of kimberite and talc deposits are recounted.In the field of environmental investigation,the application of electrical methods to water quality survey is reviewed,and the utilization of geophysical techniques in urban dump survey,the...

Based on geophysical literature published abroad in 1996,this paper first describes briefly the new frontiers in the development of geophysical techniques.In the field of mineral exploration,new advances in prognosis and prospecting for ore deposits,exploration methods,and case histories of kimberite and talc deposits are recounted.In the field of environmental investigation,the application of electrical methods to water quality survey is reviewed,and the utilization of geophysical techniques in urban dump survey,the site investigation of abandoned collieries,and the study of environmental effects of urban artificial physical fields as well as the newly adopted methods in landslide and cavity detection are reported.In the field of regional and deep geophysical investigations,the Mineral Exploration Initiative carried out recently in some western countries,the study of large-scale electrical conductivity structure,and the compilation of Antarctic magnetic maps are outlined.In the field of new exploration methods,description is given in such aspects as new airborne EM system——FLAIRTEM,non contact data acquisition techniques in electrical(EM) explorations,measurements of spectral induced polarization for environmental application,new regional exploration methods for detecting hydrocarbon alteration plumes,and sea gravimeter.

本文根据 1996年国外发表的勘查地球物理文献 ,概要列举了物探方法发展的新前沿。在矿产勘查方面介绍了金属矿预测和普查工作的新进展以及金伯利岩、滑石矿床的找矿方法和实例。在环境勘察方面 ,回顾了电法在水质调查中的应用 ,介绍了物探方法在城市垃圾场调查、煤矿闭坑善后工作、城市人工物理场环境效应调查中的应用以及滑坡和洞穴调查中新采用的方法。在区域和深部地球物理调查方面 ,概述了西方国家近年来实施的矿产勘查开创计划、大规模的电导率结构研究和南极磁异常图的编制。在新技术新方法方面 ,介绍了新的航空电磁系统———FLAIRTEM、电 (磁 )法中非接触数据采集技术、谱激发极化法在环境调查中的应用、探测油气蚀变柱的区域勘查新方法和海洋重力仪

 
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