In this paper , the general principles are introduced to establish the wave - motion equations by use of two descriptions ( lagrangian and eulerian descriptions ) in the continuum mechanics , when the finite deformation is taken into account 本文首先介绍了考虑有限变形时，用连续介质力学的两种描述法( lagrange描述法和euler描述法)建立波动方程的一般理论。
A major problem that is associated with most texture description methods is their sensitivity to scale , that is , the texture characteristics may disappear at low resolutions or may contain a significant amount of noise at high resolutions [ 3 . 70 , 3 . 71 , 3 . 72 ] 主要问题与大多数纹理描述法的敏感度有关，即，在低分辨率时纹理特征可能消失，在高分辨率时又可能包含大量噪声。
Part two investigates the course of christian women ' s higher education , which includes five phases : germination , development , diversion , transference and ending . different phases have different characteristics during the hard journey of its development 第二部分运用历史描述法考察了教会女子高等教育的发展历程，它经历了萌芽、发展、转型、迁移、终结五个阶段，不同时期呈现出不同的特征，反映了教会女学的艰难历程。
The three target representations are expatiated , that are the target representation based on the feature , based on the template and based gabor wavelet neural network , the advantage and disadvantage are discussed . the construct method of gabor wavelet neural network is expounded 阐述了三种不同的目标表示法，即基于特征的目标描述法、基于模板的目标描述法和基于gabor小波神经网络目标描述法，同时分析了三种表示法的优缺点。
In this paper the turbine blade is described by the method of csg and b _ rep mixed . each part of turbine blade has been divided into the meshes with the parameter mapping method . then the process of integrating the sub - block into a whole object is completed with the method of integer coordinate 本文采用csg与b _ rep混合描述法描述汽轮机叶片的结构，利用参数映射法对汽轮机叶片的每个子块进行网格剖分，然后利用整数坐标实现子块网格集合成整体有限元网格模型。
The french historians , who describe the position of the french troops before they marched out of moscow , assert that everything was in good order in the grande arme , except the cavalry , the artillery , and the transport , and that there was no forage for the horses and cattle . there was no remedy for this defect , because the peasants of the surrounding country burned their hay rather than let the french have it 法国的历史学家在描述法军在退出莫斯科之前的状况时说，大军井井有序，只有骑兵炮兵和辎重兵除外，他们没有草料喂牲口，对这一灾难束手无策，因为城郊的农民宁肯把自己的草料都烧光，也不留一点给法国人。
Lithology should be determined by comprehensive analysis and judgment through chemical agents analysis method and microscope amplification description combined with outlook characteristics description , integrated with regional data and comprehensive logging data in the course of cutting logging in southern marine carbonatite 摘要南方海相碳酸岩岩屑录井应以化学试剂分析法、显微镜放大描述法为主，辅以外观特征描述法，结合区域资料、综合录井资料、综合分析、判断，确定岩性。
Description and input of parts process database , and process deduce and illation etc . on a basis of analyzing turning parts " composing characteristic , adopting the form describes , the form factor ' s definition & coding for parts was realized , the information model of parts was formed , and the inputting design of parts information was accomplished 在对回转体零件构成特性分析的基础上，采用形面描述法的思想实现了零件形面要素的定义、编码及其描述参数的确定。构造了零件信息模型，并以此模型为基础完成了零件信息的输入与存储设计。提出基于关系数据库的工艺决策模型，实现了工艺知识数据与工艺决策程序的相对分离。
Regard yield function as temperature and plastic strain ' s function , the deflection of simply - supported slabs under fire are analyses by coordinate finite element . the computing results show in good agreement with the results of tests . it is demonstrated that the method and the computer programs are reliable 理论分析主要是采用二维有限元分析了构件截面温度场；采用拖带坐标描述法的有限元格式，在考虑了在时间步内屈服面是温度和塑性的函数基础上，分析了简支板在火灾作用下的变形规律，所得结果与试验吻合较好。
The paper uses method of the description of the feature to describe the information of geometry and manufacturing according the idea of feature modeling . the computer can create automatically the producing link file of the feature . using the information of the file , the computer can order the process , select the producing remains and calculate automatically the process dimension 论文根据特征建模的思想，采用特征表面描述法来对零件表面的几何信息和制造信息进行描述，并用人机对话的方式输入特征的信息。根据输入的信息，计算机自动生成各特征表面的加工链文件，并调用该文件的信息进行工序排序、工序余量选择、尺寸的自动计算等。
