Nacre is one of the general construction units of mollusk shells , thoroughly studying on it can provide insight not only into the pearl - culture , but also into fabrication of advanced organic - inorganic composite materials 珍珠层是软体动物硬壳中普遍发育的一种结构单元，对其进行深入研究可为人工培育珍珠及制造现代有机-无机复合材料提供科学依据。
According to the structure characteristics , on the view of 3d modeling , layered rock - mass was divided into three basic types of structure element : continuous rock - mass ( non - folded ) , fault rock - mass ( non - folded ) and fold rock - mass 根据岩体的结构特征，从三维构模的角度上，将层状岩体划分成连续型非褶皱岩体、断裂型非褶皱岩体与褶皱型岩体3种基本类型的结构单元。
In the 5th chapter , aiming at the case part of complex structure , the information description method based on foundation - structure - unit and azimuth - structure - unit - tree is presented , and hierarchical information model of case part is defined 第五章针对复杂结构的箱体类零件，建立了基础结构单元与方位结构单元树信息描述方法，定义了层次结构的箱体零件信息模型。
We also develop an experiential formulation based on structural unit model for high - index surfaces and that can give an estimate of the energies of the high - index surfaces , given the value of surface energy of ( 001 ) , ( 110 ) or ( 111 ) 在此基础上，提出了基于表面结构单元模型的[ 001 ]晶带和[ - 110 ]晶带表面能的经验计算公式。公式计算结果和采用分子动力学模拟结果一致。
Applying the design theory of mass customization , planning process of the product family , and combination relations between pfsc ( product function and structure component ) in the productions structural tree and product , as well as the relations between each pfsc were presented 摘要运用大规模定制的设计理念，阐述底盘产品族规划流程以及结构树中产品功能结构单元之间及其与产品间的组合关系。
In the 2nd chapter , the modeling method of manufacture - oriented structure unit is put forward , and has been used to implement design reuse . the structure unit encapsulates manufacturing and planning data , and provides basic modular for product design and process planning reuse 第二章提出了支持设计重用的面向制造结构单元建模方法，将加工工艺和制造数据封装于结构单元中，为零件结构设计和工艺设计重用提供了基本模块。
When damaged elements increase at the same time and the number of element is much more than that of measured modes , the sensitivity analysis method can ? give desired results . therefore , a method which can identify damage though two steps , location and extent , is put forward 当结构中同时损伤的单元数目较多，以及结构单元数目远大于实测的模态阶数时，灵敏度分析法的识别结果严重下降，本文提出损伤识别的两步法，将结构的损伤分为定位和定量两个步骤，有效地改进了识别效果。
In this theme , the actual states and basic performances of the dross - treatment factory building in present , especially the displacement of the base and the deformation of the structure , are described as a result of the works of investigation and detect ; mechanical analysis and load - carrying capability check of the building structure are carried out according to the results of investigation and detect , including the limit - elements analyses of representative spacial structure model ; a special analysis is made to the effects of the base displacements , and the threshold values of relative displacement of the base are proposed ; in connection with the results of the investigation , detect and analyses , the structural reliability of the dross - treatment factory building is analyzed and accessed , the grade of reliability are determined ; finally , with regard to the problems of the dross - treatment factory building , the effective technical measurements of reinforcement , usage , monitoring control etc . are put forwards 论文的研究目的是准确评定厂房结构的可靠性，并制定有效的技术措施。通过实际的调查和检测，论文全面论述了渣处理厂房目前的使用状况和基本性能，特别是地基位移和结构变形的状况；根据调查检测的结果，对厂房结构进行了系统的力学分析和承载力校核，包括典型结构单元的空间有限元分析；对地基位移的作用效应作了专门分析，提出后期使用中地基相对位移的控制值；结合调查检测和计算分析的结果，对渣处理厂房的可靠性进行了综合评定，判定了厂房的可靠性等级；最后，针对渣处理厂房所存在的问题，从加固、使用、监控等方面提出了相应的对策。
The paper , in the way of math morphology , manages to classify the linear elements , the same type but different width in the scanning , and result in the two - valued linear image in the same level . in the fine division of the target image , a way of math morphology based on the double structure of cell stencil is put forward , which prevents the terminals and the acnodes from losing and also reduces effectively time in doing so . as the result of the framework of the fine division , vector method is formed in which its track is monitored by using dynamic change of pace about freeman ' s chain code 本文用数学形态学相关理论方法实现了对扫描图像中具有同一线型但不同线宽的线状要素进行分类，在同一层上得到同一线宽的二值线状要素图；在对此目标图像进行细化时，提出了基于双结构单元模板的数学形态学细化算法，用该算法对实际的线状要素进行细化，避免了端点、孤立点等信息的丢失，且由于是并行处理，有效地提高细化速度；对于细化后的骨架线，提出了基于freeman链码的动态改变步长保持精度跟踪矢量化方法。
The results are believed the first attempt that resolves the circuit identification problem of the spatial linkages with four closures . the theory of type transformation of planar linkages has been extended to the kinamatic analysis of spatial linkages . the structural decomposing criterion and its automatic generation algorithm for multi - loop spatial linkages are discussed 将平面连杆机构运动分析的型转化和广义型转化理论拓展到空间连杆机构的运动分析，得出了型转化法全间连杆机构的结构分解准则及其自动生成算法:给出了以型转化单元为结构单元的空间机构单元划分方法。
