Resource Management in Application System

Application system generally refers to all kinds of computer information system. It aims at improving the sharing and application of the resource. The resource in application system usually means data resource. For computer management and maintenance, there are not only data resource, but also program resource and network resource. Effective management of this resource is key to ensure proper work of the application system. In this paper, the basic pattern and policy for resource management is put forward and a method to build and realize the resource layer that lies between database layer and application layer is to be found. This management layer, which skillfully connects the application system with resource and establishes good base for application and exploitation of system, is named as resource management system.     

Effects of Infill Walls in Frame Structures under Frequent Earthquake:Revelation from Wenchuan Earthquake

Based on a three-story RC frame, the analysis of the structure with various layouts of infill walls under frequent earthquake was conducted. The results indicate that when the infill walls and their different layouts are incorporated into the structural model, the seismic performance, such as dynamic properties, characteristics of regularity, and internal force distributions would change significantly. It should be also mentioned that because of the constraint of infill walls, the sum of moments at column ends is much larger than that at beam ends at the frame column-beam joints. It is suggested that infill walls should be adequately considered in the mechanical models during seismic analysis.     

Structural Influencing Coefficient of Moment-Resisting Steel Frames Based on Equal Collapse Rule

In order to realize the performance target of “no collapse under rare earthquake” based on the seismic design according to structural influencing coefficient, three moment-resisting steel frames have been designed with similar probability of collapse in accordance with Chinese Seismic Code. The structural influencing coefficient of steel frames were determined through the incremental dynamic analysis method, and within equal collapse design rule. This paper proposed a method to define structural influencing coefficient can provide reference for determining the design seismic force of steel frame reasonably.     

Calibration of Nonlinear Dynamical Analysis for RC Frame-wall Structure with Slender Coupling Beams Considering Stiffness Reduction

Two 16-storey frame-wall structures with slender coupling beams in regions of Intensity 8(0.2 g),with and without considering the stiffness reduction of the coupling beams,were designed.Nonlinear dynamic response analyses of two typical frame-wall structures subjected to several ground motions were carried out.The analyses were based on the quasi-tridimensional program for nonlinear dynamic response analysis TS-EPA.The analyses led to the following conclusions: Under rare earthquake actions,the coupling beams in framewall structures yield first.This shows that the coupling beam in frame-wall structures is the member at the forefront of earthquake resistance.Comparison of the analytic results of two couples with and without considering the stiffness reduction of the coupling beam found that,in view of the dynamic response to and the requirement for ductility under rare earthquake motions,reducing stiffness causes a minor unfavorable influence on the dynamic response of frame-wall structures.     

Elastic-plastic Analysis of Timber Frame with FEM

Elastic-plastic analysis of timber frame and its seven strengthened projects are analyzed with the software ANSYS10.0. The numerical calculation and material mechanics calculation for the timber beam are compared to verify the correctness of the finite element model. The paper also analyzes the law of stress and strain of timber beam. In contrast with the yield load and ultimate load of strengthened timber frames, it shows that the lateral resistance of timber frame with corner supports is greatly improved. And a strengthened project for the timber frame is put forward.     

Seismic Behaviour of Multi Story Brick Building with Frame Shear Wall in the Two Botton Floors

A shear vibrational model applied assemblage of multiple particles is proposed for the seismic response analysis of masonry building with R/C frame wall in the two bottom floors.On the basis of analyses,some problems are discussed,these mainly are:dynamic properties,main factors that have influence on seismic behavior,earthquake resistant reliability of this building under strong earthquake and the rational ratios of lateral rigidity.[WT5HZ]     

现浇钢筋混凝土格构锚固结构研究应用现状及展望

从现浇钢筋混凝土格构锚固结构的布置形式、对边坡加固的机理以及结构的计算方法几个方面介绍了该结构的研究和应用的现状,并在此基础上对今后该种结构的研究方向做出展望。     

机动式喷杆喷雾机机架的轻量化设计

为了解决机动式喷杆喷雾机机架质量过重、燃油消耗率和碳排放量过高等问题,以机动式喷杆喷雾机机架为研究对象,建立了机架的有限元模型。对机架进行了试验模态分析,将仿真结果与模态试验数据进行了对比。利用有限元分析软件Radioss对机架进行了静态分析,计算了机架在水平弯曲和极限扭转工况下的应力分布及变形。根据有限元分析结果,对机架进行了轻量化设计并对机架进行了结构改进。研究结果显示:模态试验结果与有限元仿真结果基本接近,验证了有限元模型的准确性;经过尺寸优化,机架的质量降幅为40.4%,实现了轻量化目标;根据轻量化结果对机架进行了结构改进,改进后弯曲工况和扭转工况的安全系数为分别提高了9.7%和7.8%。该文的相关研究可以为企业研发机动式喷杆喷雾机提供一定的参考。     

基于GIS技术的县级中压配电网架优化规划方法

该文运用GIS技术将负荷点的地理坐标转化为屏幕坐标,并在屏幕上显示,根据屏幕上负荷的分布密度情况,通过人机对话方式将规划区域划分成几个小区域(分块区域)。首先对每个分块区域利用最小二乘法确定初始主干线,在此基础上对该区域的负荷点按照最短路径法进行连接,形成初始网架;根据目标函数的要求不断修正主干线及相应的负荷连接,实现了每个分块区域的最优网架;将每个分块区域的优化网架连接,形成该区域的优化网架。该方法将网架优化理论与GIS技术紧密结合,并将复杂问题分解成简单问题。实例规划结果表明,该优化方法智能、快速、有效。     

我国北方农牧交错区土地生态安全评价——以白城市为例

白城市位于北方农牧交错区,生态环境脆弱。为了解其土地生态安全状况,基于压力—状态—响应（pressure-state-response简称PSR）模型,共选取21个指标构建了土地生态安全评价指标体系,对2007—2012年白城市及其所辖5个县区土地生态安全变化情况进行评价分析。结果表明:（1）各县（市、区）土地生态压力—状态—响应情况不同,镇赉县、大安县及洮北区土地生态压力安全值较高,对安全综合值贡献率在38%以上;洮南市土地生态状态安全值较高,贡献率在36%以上;通榆县土地生态压力—状态—响应安全值分布比较均衡,贡献比为35:34:31。（2）2007—2012年,白城市土地生态安全综合值由0.712 2提高至0.780 4,土地生态环境有所改善,但土地安全等级仍处于敏感级,生态环境比较脆弱。（3）白城市土地生态安全状况的改善有赖于实施有效的人口政策,控制人口规模;引进人才,鼓励农民发展新型绿色农业,减轻土地污染压力;提高环境保护意识,加大环保投资力度,促进土地生态恢复。