重力坝CAD系统

本文叙述了微机重力坝CAD系统的组成,系统的分析与设计,组成各模块的关系框图与各模块实现的功能,以及各种支撑软件在本系统中的应用。文中给出结合工程的计算实例。算例表明,应用本系统进行工程设计,不但缩短设计周期、提高设计质量,而且降低了设计成本,具有显著的经济效益。     

Preparation of Electrically Conductive Filler for Anisotropic Conductive Adhesive

Introduction As a competitive substitute of lead-containedsolder,ACAs appear a promising future due totheir numerous advantages,such as low-tempera-ture compatible assembly,higher packaging densi-ty,environmental friendliness,low-stress on thesubstrates.T…     

认识雷暴

文章介绍了雷电的产生和实质,分析了雷电对人类造成的危害和雷电对人类的用处。     

胚胎早期中脑和后脑发育的基因调控新机制

在动物的早期胚胎发育中,最初的神经系统就像一根“管子”贯穿于胚胎的背部,从头到尾几乎一样粗细,被称为神经管。随着发育的推进,“管子”的前部逐渐膨大,分化成3个脑泡——前脑、中脑和后脑,并最终发育成脑;后部则越来越细,发育成了脊髓。在人脑的发育过程中,随后还有一系列复杂的分化过程。首先是前脑继续分化为两部分——端脑和间脑,前者后又发展成两个大脑半球,而后者则发展成为丘脑、下丘脑和松果体;胚胎的中脑生长较慢,基本保持了原来的“管状”形态;后脑分化为脑桥、小脑及延髓。控制中脑和后脑发育的关键区域位于中脑与后脑之间的…     

互惠型农民专业合作社可持续发展模式研究——以广西防城港光坡镇X海产品养殖协会为例

互惠型农民专业合作社由非体制精英发起,基于地缘、血缘或业缘关系形成社员互惠关系,社员依托经济利益关联相互协作。以海产品养殖协会为例,互惠型农民专业合作社在农民生产过程中具有明显的发展成效。同时,互惠型农民专业合作社可持续发展的组织内外部约束性条件也不应忽视,需从协作意识、管理机制、扶持政策等方面完善其可持续发展模式。     

工程设计 系统解决方案，第三版

工程设计在20世纪80年代引起世界范围的关注并得到迅猛发展。本书的德文和英文版为工业、研究及教育中系统的工程设计提供参考。     

空间自位相调制生成激光衍射环研究介质的热致非线性

本文通过衍射理论分析了介质中由于热致非线性而产生的衍射环。根据空间自位相调制原理，由衍射环数可近似求出介质的热光系数。并从实验上对茶酒精溶液的热致非线性进行了研究，其结果与用Ｚ－ｓｃａｎ法测量值基本相同。     

Physical location of terminal markers belonging to five linkage groups in maize RFLP map using in situ hybridization

Ten terminal or subterminal RFLP markers belonging to linkage groups 1, 3, 5, 6, and 10 in maize RFLP map were physically locted onto maize mitotic chromosomes with in situ hybridization. All biotinylated probes from 600 to 2 250 bp were detected by DAB staining. The markers belonging to linkage groups 1, 3, 5, 6, and 10 correspondingly located at the chromosomes 1, 3, 5, 6, and 10. All of the tested markers except bnl6.25 and umc44 were duplicated sequences. Each of them was also labeled on another chromosome besides on the chromosome corresponding to its linkage group. The marker bnl3. 04 was triplicated sequences and the signals were detected on three nonhomologous chromosomes. In the tested ten markers, there were only four located at the ends of corresponding chromosomes. Others were located at sites midway along the chromosome arms or near the centromeres. The region covered by two terminal or subterminal markers in each of linkage groups 1, 3, 5, and 6 occupied 80.02%, 38.25%, 82.30% and 51.16% of the region of both short and long arms in chromosomes 1, 3, 5, and 6 respectively. Only two terminal markers of linkage group 10 covered the whole chromosome 10. In some linkage groups, two terminal or subterminal markers covered a short genetic distance but were physically distant, while two covering a longer genetic distance were physically closer. Supported by The National Natural Science Foundation of China and the Doctorate Vesting Point Foundation of the Education Committec of the People's Republic of China Mao Ninghui: born in 1986, used to be an MS student of Wuhan University in 1992–1995 and now is working in Fudan University, Shanghai 200433     

Design and implementation of DBC based on dynamic AOP

Traditional approach of design by contract, due to mixing the contract code with application code, is difficult for the extensibility and reusability of software system. This paper presents a framework named JADBC for design by contract based on Aspect-Oriented Programming (AOP) to resolve these problems. By providing a new modularized element, aspect, the framework successfully separates the contracts in design by contract, from functional codes. The implementation of this framework is based on dynamic AOP which can have the contract changed at runtime, consequently, enhancing program flexibility. JADBC framework modularizes the contracts in a clear-cut fashion that is easier to design, implement, and maintain. Biography: WEN Jing (1982–), female, Ph.D. candidate, research directions: software engineer, aspect-oriented software development.     

从曲谱看《全元散曲》存在的若干校勘问题

隋树森编的《全元散曲》作为散曲研究的材料很完备,但在使用过程中发现其中仍有诸如断句、脱韵、字词讹误、次序颠倒等等不少疏失之处,试依据曲律、曲韵对其中的字句脱漏、讹误、颠倒及其他一些讹误进行校勘,以期为研究者提供些参考。