体系结构

The results computed by Algor and TAT with the combination of model response analysis method and the time history analysis method are given respectively.

计算结果表明：采用不同的计算方法与计算程序得到的斜撑框架结构体系的自振特性相差较大，而结构的内力相差不大；目前的商用软件如TAT可适用于斜撑框架结构的工程设计。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

It can be seen that the bulk modulus depends mainly on electrons per atomic volume and mass density, while covalent structure of chemical bonding and N content make more contribution to theoretical hardness, and appropriate content N—N covalent bonding in the same direction tends to increase the shear modulus of nitrides.

说明在Tc的氮化物中，其体弹模量与材料的晶体结构、平均每个原子上的电荷密度和材料的质量密度有关；化学键的共价性结构和氮元素的含量对理论计算硬度有正作用；而剪切模量的极大值则与其层状结构及体系中一定量的方向基本一致的N—N键相关。

The effects of the composition of catalyst (the structure and amount of bident ligand and strong acid, the cocatalytic activity of Cu〓, the roles of methanol and phenol etc.) and the copolymerization condition (the reaction time, temperature, amount of ST and CO, the structure and amount of dilution reagent etc.) on catalytic activity were studied in detail. Also the optimum copolymerization condition was chosen.

深入考察了催化体系组成（含氮双齿配体的结构与用量、强酸的结构与用量、铜盐的助催化作用、醇类与酚类化合物的作用等）和沉淀共聚反应条件（共聚反应的温度与时间、稀释剂结构与用量、苯乙烯与一氧化碳量等）对该共聚反应的催化活性的影响，优化共聚反应的聚合条件。

The molding is concinnity and the structure system is definite. Through the research of the problems about the structure system, static and dynamic character, and the bear rigidity of the under structure, this paper presents t...

本文通过对该屋盖结构的受力体系、静力和动力特性以及下部结构的支承刚度等问题进行研究与分析，提出此类大跨大悬挑结构在分析与设计过程中应注意的问题，并对部分关键节点设计进行介绍。

Compared with the tier building, the mid-rise house increases the cubage rate of the building with better corollary facilities; compared with the high-rise house building, it has a good many merits such as predominant apartment type, less investment, shorter project duration, lower difficulty, etc.

随着小高层住宅的应用越来越广泛，其结构设计越来越重要，其中最关键的就是结构体系的选择和结构布置，它直接关系到了整个住宅结构的安全性、适用性及经济性。

This paper is based on the former research taking the No.1 Tong-Lv Bridge as an example; the large universal finite element program Midas/Civil is adopted, a three-dimensional finite element model is established. The static performance, the comparative analysis of influence surfaces, the experimental study and the analysis of a local finite element model of the new style three-span continuous through type bow-string arch bridge is made. With these studies, this paper is aimed at revealing the performance of this kind of construction.

本文在前人研究的基础上，以通吕一号桥为背景，采用空间有限元法对结构形式新颖的三跨连续下承式系杆拱桥的静力性能、影响面比较分析、实桥荷载试验、局部节点分析等进行研究，旨在深入理解该结构形式桥梁的力学性能，为今后相同结构体系桥梁的结构分析提供可以参考的建议。

This thesis has studied Levy system Cable dome's tension and simulated 24 tension schemes by using finite element analysis software.

本文所完成的Levy体系索穹顶结构的结构选型，节点设计，张拉方案研究是对现有索穹顶结构理论研究的有益补充，并为索穹顶结构在我国的工程应用提供参考。

The First Engineering Company has now been accredited with the qualifications of Class A Gontractor for Port and Waterway Engineering Works and Municipal and public Works and Class A Specialty Contractor for Sleel Structures and Foundation Works.The Company has also been accredited with the qualifications for construction of building works and bridge works,production of ready-mix concrete and fabrication of concrete units.The Company is accredited with the certificate issued by the Commission for Ratification of National Laboratories of China.The Company has also the qualifications of Class A for testing and measurement of marine works and qualifications of Class B for testing and measurement of road works vested by the Ministry of Communications of China.

具有港口与航道工程、市政公用工程总承包一级、钢结构、地基与基础工程专业承包一级，以及房屋建筑工程、桥梁工程、预拌商品混凝土及混凝土构件的施工资质；取得中国合格评定国家认可委员会实验室认可证书、交通部甲级水运工程、乙级公路工程试验检测资质、天津市交通建设工程试验检测机构资质证书；1998年以来公司先后通过了ISO9001质量管理体系、ISO14001环境管理体系、OHSAS18000职业安全健康管理体系认证；荣获&全国五一劳动奖状&、&全国优秀施工企业&、&全国用户满意施工企业&、&全国质量安全管理先进单位&、&中国工程建设社会信用AAA证书&、&全国守合同重信用企业&、&天津市优秀企业&、&全国模范职工之家&、连续23年获得&天津市守合同重信用企业&等荣誉称号。

We describe the use of the CDB within CORAL and the fullscale performance tests on the COMPASS Computing Farm,The CDB has been interfaced to the SCADA PVSS slow control system.

选用对凝聚态的结构和性质描述更为准确的COMPASS分子力场模型。体系进行能量优化后得到的密度和玻璃化温度的计算值和实验值的对比表明模拟体系接近于真实体系。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。