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Study on the structure and stablities of anion cluster(SiO_2)_nX~-3MR (three-membered ring) structure, 2MR (two-membered ring) linear chain structure and pseudotetrahedral cage structure have been proposed for the anion cluster (SiO_2)_nX~-(n=1~5 X=_, 0, OH).

主要研究(SiO_2)_nX~-(n=1~5 X=_,O,OH)离子团簇的三类典型结构(三元环结构、二元环链状结构和四面体笼状结构)。

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。

Today, database applications with three-tiered architecture have become the mainstream in the scope of database applications.

数据库应用程序的体系结构由单层结构发展到了三层和多层结构,目前,三层结构的数据库应用程序已成为数据库应用系统的主流。

Enterprise information system architecture has changed remarkably: two-tie application architecture, three-tie application architecture, N-tie application architecture based components.

企业应用体系结构已经经历了巨大的发展:二层应用体系结构、三层应用体系结构、基于组件的N层体系结构

The average roof angle of the three-stringed greenhouse was higher 1.7°than the ordinarygreenhouse in theory, and the sunshine incidence rate was higher 0.4%.

通过采用三弦结构优化温室前屋面采光结构与传统结构相比,结果表明采光面顶部和底部屋面角升高,理论上平均屋面角升高1.7度,阳光入射率升高0.4%,并且优化后在实际应用效果方面三弦结构降低了温室顶部膜面与温室后坡交接处的缝隙放热,施工简单。

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。

One is the traditional structure with a direct parallel-line coupling and the other is three-line coupling structure.

根据此观念,本文利用了两种耦合结构合成滤波器,一个是传统的直接耦合结构,另一个则是三线输入/出耦合结构,后者可用来补偿传统直接耦合结构的缺点。

By analyzing a monofilament cable, it is presented the conclusions that the influencing factors of the load-carrying properties of flexible supporting s stem include the initial prestress the diameter of tension rod or cable, the rise ratio and the height of the structure etc.

通过对单根拉索结构的力学分析,提出影响这种结构刚度和承载性能的因素主要包括:初始施加预应力的大小、拉杆的直径、结构的腹高比以及结构的高度等。

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。

Particular designs for joint structure are presented. The integrative design method of joint structure and angle coders is adopted so that the mechanical structure is compact and the cost is lower. In order to lighten the swing of rotary axis of joint angle sensor, high-accuracy anglecontact ball bearing is selected.

对关节结构进行了特殊设计,采用了关节结构与角度编码器一体化设计原则,保证测量设备的结构紧凑,降低成本;选择了高精度角接触球轴承,以减小角度传感器轴系的晃动,提高测量系统的总体精度;确定了空心轴结构,使传感器信号线从中穿过,使得测量设备外观美观。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力