Axisymmetric fundamental solutions for a finite layer with impeded boundaries

INTRODUCTIONBiot’sconsolidationtheorywasproposedin1 941fromcontinuousmediumfundamentalequations.Thetheorytakingintoaccountthecouplingbetweenthesolidstrainsandporepres suredissipationiscalled“coupledconsolidationtheory” .Thesolutionofgoverningequationso…     

空气校准器在小量程流量计校准中的应用

介绍了利用热线热膜风速计测量其空气校准器出口的速度分布，经过曲线拟合和积分，可以得出其平均速度和流量。空气校准器被改造成一台标准的气体流量计并成功地应用于其它小量程气体流量计的校准。     

软弱地基换填处理及抛石辗压夯实加固施工技术

软弱地基换填是指将原地基下臣软弱层挖去，回填碎石砂等进行地基处理的一种施工方法。茂名市新中成衣批发市场综合楼为6层框架结构，建筑面积5200m^2，局部地基存在软弱下卧层，采取了快速水下换填法；其它基础承载力不够部分，采用抛石辗压夯实相结合法加固地基，取得成功。实践证明，使用该方法处理地基是一种快速经济的施工方法。     

试论仪式对悲剧心理距离的影响

仪式是戏剧的最初形态。仪式有两种存在方式:一种是发展成戏剧,一种是作为艺术形式保留在戏剧里。后者或者以完整的仪式形态保留在戏剧里,或者以一种仪式感存在于戏剧中。本文试图探讨存在于戏剧中的仪式或仪式感对悲剧的心理距离产生了何种影响。     

软件架构中的分层及其应用开发

提出了软件设计的目标，分析了早期的二层结构的不足之处以及目前盛行的三层结构的优点并详细介绍了一个基于J2EE平台上的网上购物系统，这是一个很典型的分布式多层应用系统，描述了系统如何通过分层来实现了设计的基本目标。最后，提出了三层结构可能带来的问题，并就如何解决问题提出了建议。     

A Blast Shock Isolation System with MRFD and Its Semi-Active Control Analysis

To effectively reduce the damage to people and devices in civil defense engineering subjected to blast shock, a blast shock isolation system with magnetorheological fluid dampers (MRFD) is proposed. MRFD can provide continuously adjustable Coulomb friction and has many advantages for semi-active control. Numerical simulation of this isolation system is finished using Matlab simulink toolbox. General semi-active control algorithms are consided based on instantaneous optimal active control algorithm. And the results indicate that the shock isolation system can work efficiently, decreasing about 93% of the peak acceleration of the isolation floor.     

三价铬对镀铬液性能及镀铬层质量的影响

采用镀硬铬溶液 ,用电解法改变镀液中Cr3 + 浓度 ,实验Cr3 + 浓度对镀铬液性能及镀铬层质量的影响。结果表明 ,镀铬溶液中Cr3 + 浓度偏低时 ,镀液深镀能力差 ,镀层光泽不良 ,清洗性差。随着Cr3 + 浓度升高 ,镀液分散能力和电流效率降低 ,光亮区电流强度范围减小 ,而镀液深镀能力、镀层硬度及耐磨性随Cr3 + 的浓度升高而出现极值     

隔震技术与应用

介绍了几种隔震技术的工作原理及应用情况,总结了我国隔震技术的应用现状及发展前景。     

Performance of the geometric approach to fault detection and isolation in SISO, MISO, SIMO and MIMO systems

In this paper,a geometric approach to fault detection and isolation (FDI) is applied to a Multiple-Input Multi-ple-Output (MIMO) model of a frame and the FDI results are compared to the ones obtained in the Single-Input Single-Output (SISO),Multiple-Input Single-Output (MISO),and Single-Input Multiple-Output (SIMO) cases. A proper distance function based on parameters obtained from parametric system identification method is used in the geometric approach. ARX (Auto Regressive with eXogenous input) and VARX (Vector ARX) models with 12 parameters are used in all of the above-mentioned models. The obtained results reveal that by increasing the number of inputs,the classification errors reduce,even in the case of applying only one of the inputs in the computations. Furthermore,increasing the number of measured outputs in the FDI scheme results in decreasing classification errors. Also,it is shown that by using probabilistic space in the distance function,fault diagnosis scheme has better performance in comparison with the deterministic one.     

关于《叶绿体色素提取与分离》实验的难点分析及其改进方法

叶绿体色素提取与分离实验，在植物生理学的实验中，是一个非常重要的教学内容，通过对实验的难点进行分析，并改进实验中的一些试验，实验步骤和方法，使学生的实验成功率明显提高，取得良好的实验教学效果。