It is reali zed that the invisible part of the object can be shadowed , using the max imum or minimum enveloping rectangle method and the counter of points of intersection method , etc . ( 3 ) the boolean operation between integrity or unintegrity bodys is supplied 分析并讨论了形体产生隐藏线、隐藏面的原因，利用了最大最小外包矩形法、交点记数法等，实现了任意形体的消隐算法。 ( 3 )完成了形体间的正则、非正则布尔运算。
Indeed , by following what is a straightforward building programme , and using pre - designed house - types ( such as those in section 2 ) , building zeds should be less risky than traditional housing developments , especially when we consider over a thirty year scenario 实际上，按照明确地建造程序，利用预先设计好的住宅类型（比如第二部分的类型） ，建造零能耗开发项目的风险要比传统住宅的小，尤其当我们考虑三十年的使用期限时风险更小。
Besides , successfully calculating the electromagnetic four - potential in the spacetime of charged black hole expressed by the generali zed spherical coordinate and furtherly solving the h - j equation of such spacetime make it possible to get the exact description of the energy extent of nonthermal radiation particle and to study the characteristics of such black hole ' s nonthermal radiation 另外，本文还求出了一类用扁椭球坐标表示的荷电黑洞时空中的电磁四维势矢量，从而成功地求解了此类弯曲时空中的hh方程，得到了这种非热辐射粒子能量范围的精确表达式，从而对这类黑洞的非热辐射特征进行了研究。
This paper gives a profound analysis on the causes and process of formation , feat ures of the locations , their varieties and specific property of “ the self - organ i zed meeting center ” by applying the modern principle of ecology , and these ce nter s vary from each other , they have proper and stable locations and many activities for outside go on at particular times , which is mainly for old people in urb an c ommunities . it points out that the natural ecological feature which has been is many old people s spiritual sustenance which has been possessed during the f orm ation of the centers . it also indicates the necessity of including this factor in to the construction planning of urban cities and the architects responsibili ties to provide places for these people , instead of the passive finding for the pub lic 运用现代生态学原理对城市社区中以老年人为主体组成的形式多样、布点合理、场所稳定，在特定时间开展诸多户外活动的“自发聚会中心”的成因、形成过程和条件、场所种类及特性进行了深入分析，指出这一中心的形成所具有的自然生态特质，它是众多老年人户外活动的感情寄托，并提出在城市社区建设中纳入这一因素的必要性，认为建筑师应在规划中主动地提供场所与条件，而不是老年人自发被动地寻求。
Abstract : the physical - chemical proerties of grains and flour and doughrheological properties of four kinds of french commercial wheat were analy zed . the suitability of french wheat flour for chinese traditional food products such as steamed bread and noodles was preliminarily studied in order to get more information on how to utilize french wheat for chinese food 文摘:本文主要就4种法国商用小麦的理化特性及其面粉的理化特性和面团的流变学特性等进行较为全面地分析，并初步探索了法国小麦粉在中国传统食品馒头、面条中的应用，旨在为合理利用法国小麦、面粉制作中国传统食品馒头、面条提供一些指导。
