关于工程项目风险分析的模糊影响图方法

本文综合应用模糊集与影响图理论建立了模糊影响图方法，并以工程项目风险分析系统为背景进行了初步应用研究，取得一定成效。     

附带各类约束的单一型装配线的平衡

本文着重描述了附带各种约束的单一型装配线的平衡问题,讨论了如何在Thomopoulos无约束平衡搜寻方法的基础上,实施附带各类约束的单一型装配线的平衡过程,并给出了在计算机上成功运行的实例及其分析。     

工程建设用地信息管理系统的研究

工程建设用地信息管理系统”是“工程建设用地辅助决策支持系统”的一个子系统，它对土地管理部门的基础资料和信息进行统一分类和集中管理．本文对该系统从研制背景、数据库结构、整体结构、基本技术和未来发展几个方面，作一详细论述．     

重组pET30a/hsBLyS质粒在BL21(DE3)菌株中的稳定性观察

将构建的含有pET30a/hsBLyS重组质粒的BL21 (DE3)菌种,在含硫酸卡那霉素的平板培养基划线连续传代至 100代 100代次菌种经显微观察,为典型的革兰氏阴性大肠杆菌,生化特性没有改变 提取0、50、100代质粒DNA限制性内切酶切割检查,酶切图谱没有改变,DNA测序未见hsBLyS基因变异 传代前后菌种诱导表达hsBLyS,表达水平和hsBLyS生物学和免疫学活性均无明显差异     

公路工程实施政府采购面临的问题及对策

2003年1月1日起施行的《政府采购法》将公路工程等政府工程纳入该法的调整范畴，对公路工程实施政府采购存在的问题进行了探讨，提出了公路工程实施政府采购的意见和建议。     

Genetic algorithm-based wide-band deterministic maximum likelihood direction finding algorithm

1 .INTRODUCTIONThe problemof esti mating direction of arriving waveusing array signal processing has wide applications inradar ,sonar ,seismology,astronomy and mobile andsatellite communication system, and has receivedmuch attentionin recent years .But the current liter-ature about direction finding algorithmpays more at-tention to narrow-band signal ,that is to say band-width of signal is far smaller than center frequency ofsignal and so envelop of signal keeps invariant in thesensors of …     

农村税费改革形势下灌区清淤工作探讨

对灌区渠道清淤群众投工历史进行了回顾，论述了税费改革试点工作以来渠道清淤的现状，对下一步清淤工作的思路进行了探讨。     

智能CAD／CAM技术对建筑机械业的影响

本文首先介绍ＣＡＤ／ＣＡＭ的产生及发展。然后谈ＣＡＤ／ＣＡＭ对建筑机械业的影响。本主独道见解是：ＣＡＤ／ＣＡＭ技术对建筑机械业影响巨大，一个全新的计算机辅助建筑工程制造ＣＡＥＭ概念将产生。当ＣＡＥＭ实现时，建楼房将象儿童搭积木房子一样轻而易举。“安得广厦万千间，使得天下寒士尽欢颜”梦想会成真。     

Using genetically-defined rodent strains for the identification of hippocampal traits relevant for two-way avoidance behavior: a non-invasive approach

Summary Genetically-defined rodent strains permit the identification of hippocampal traits which are of functional relevance for the performance of two-way avoidance behavior. This is exemplified here by analyzing the relationship between infrapyramidal mossy fibers (a tiny projection terminating upon the basal dendrites of hippocampal pyramidal neurons) and two-way avoidance learning in about 800 animals. The necessary steps include 1) identification of structural traits sensitive to selective breeding for extremes in two-way avoidance, 2) testing the robustness of the associations found by studying individual and genetical correlations between hippocampal traits and behavior, 3) establishing causal relationships by Mendelian crossing of strains with extreme structural traits and studying the behavioral consequences of such structural randomization, 4) confirming causal relationships by manipulating the structural variable in inbred (isogenic) strains, thereby eliminating the possibility of genetic linkage, and 5) ruling out the possibility of spurious associations by studying the correlations between the hippocampal trait and other behaviors known to depend on hippocampal functioning.In comparison with the classical lesion approach for identifying relationships between brain and behavior, the present procedure appears to be superior in two aspects: it is non-invasive, and it focuses automatically on those brain traits which are used by natural selection to shape behaviorally-defined animal populations, i.e., it reveals the natural regulators of behavior.     

圆形隧洞周边位移和地层压力预报的简便公式

应用本文所提出的公式可计算地层的初始应力和由开挖引起的洞周位移。预报公式所需要的计算数据是一组相邻测点之间的量测位移,这可通过隧洞的施工监控量测而得到。在推导这些预报公式时,著者先应用一系列的有限元和无限元等数值计算方法来模拟洞室的开挖,从而得到大量的“观测数据”。然后综合应用自动回归和解析方法,建立了实用的计算公式。这些公式使用简便且具有良好的精度。