变截面门式刚架结构分析的微分求积单元法

本文采用一种精确、简便的数值计算方法——微分求积单元法(DQEM)对变截面门式刚架结构进行了力学分析。首先建立了一般荷载作用下变截面构件的平衡微分方程，并采用微分求积法进行离散，进而得出了较为精确的分析变截面构件的单元力学模型。该模型的刚度方程不仅反映了单元的刚度性质，而且反映了单元的实际荷载作用，可较为精确地分析变截面门式刚架结构在分布载荷作用下的受力性能。通过与有限元法计算结果的比较，表明了微分求积单元法在变截面刚架的力学分析中的正确性和优越性。微分求积单元法可用于任意形状的刚架结构的静力分析。     

门式刚架轻型房屋结构应用之探讨

针对门式刚架轻型房屋结构迅速发展的同时存在不少质量问题的状况,从设计与施工的角度,探讨了门式刚架轻型房屋结构应用中应注意的问题,提出了若干解决问题的措施。     

基于WEB的企业应用系统集成

在阐述企业应用系统集成的重要性基础上。提出了实现企业应用系统集成的模型和方法，以及如何运用企业门户的概念和思想构建集企业内部应用、客户和供应商管理及电子商务应用为一体的企业应用系统集成。并通过一个实例说明了这些方法的应用。     

创建基于portal的校园门户

本文描述的校园门户是指在符合JSR 168 Portlet规范（基于J2EE技术）的portal平台上部署实施的内容门户。其主要目的在于扎享知识、提供集中发布校园信息内容的统一平台。这砦内容可以从学校完全不同的系统中聚合，也可以从集中的内容储备库中提取。校园用户将该门户作为主要的通道来访问学校通过网络发布的内容。     

肝硬化门脉血流的彩色多普勒检测

应用彩色多普勒对肝硬化门脉高压患者进行门脉血流动力学检测，结果表明治疗前门脉血流量增加，治疗１个月后重复检测门脉血流量明显下降，前后测值比较差异极显著（Ｐ〈０．００１）。彩色多普勒检测门脉血流动力学变化简单易行、无创，值得临床推广。     

门式刚架厂房表面风压的数值模拟研究

基于Reynolds时均N—S方程和SST模型,对一低层双坡门式刚架结构的表面风压进行CFD数值模拟,并将模拟结果与风洞试验结果进行比较．根据模拟结果对门式刚架结构各表面的风压分布特性进行了分析和归纳,可为该类建筑的抗风设计提供参考．     

肝内门—腔静脉分流术的应用解剖

目的：为临床进行肝内门—腔静脉分流术提供解剖学基础。方法：在31例成人肝标本上观测肝静脉的汇合类型、开口纵径、横径,肝静脉与门静脉交叉处的长度、横径、两静脉间距离。结果：三条肝静脉注入下腔静脉分三种类型,肝右静脉与门静脉右干及右后上支交叉、肝中、左静脉与门静脉左干交叉。结论：肝内门—腔静脉分流术的首选部位是在肝右静脉与门静脉右干及右肩上支之间;其次是在肝中静脉与门静脉左干之间;肝左静脉不宜行肝内门—腔静脉分流术。     

高速公路隧道洞口景观色彩对驾驶员心率的影响

为了研究高速公路隧道洞口景观色彩对驾驶员心率的影响,利用3D-MAX软件对隧道洞口不同色彩进行仿真模拟,采集了10名驾驶员的心率数据,深入分析了红、黄、绿、灰等几种典型色彩对驾驶员心率的影响,并建立了隧道洞口景观色彩均值与驾驶员心率均值的关系模型。结果表明:在隧道洞口设置宽30 cm的红色时,驾驶员的心率增长幅度最大,设置同样宽度的黄色时,心率增长次之,但驾驶员心率增长量都在20%以内,不会导致驾驶员过度紧张;当隧道洞口设置绿色、灰色等暗色系色彩时,对驾驶员心率的影响不大。所以在隧道洞口设置适宜的色彩,能适当提升驾驶员的紧张感,减少交通事故的发生。     

DSC examination of the esophagus after implantation of special stents,designed for the management of acute esophagus variceal bleeding

Massive bleeding from esophagus varices presents a life threatening complication of portal hypertension. No effective method of treatment is available until now, that would guarantee high grade of patient wellness during the conditioning and investigation phase until the definitive treatment could be introduced. The aim of this study was to evaluate the tissue response to esophagus stents - designed for manage acute variceal bleeding - in animal experiment. Self-expandable nitinol stents were introduced into the esophagus of six porcines. Another twelve porcines were undergone the same procedure, using the new biodegradable stents made of PDO (polydioxanon). Histological investigations of the stented esophagus segments were observed after 2 and 4 weeks at the first 12 animals. To monitor the time of stent degradation, histology were performed 7 and 12 weeks after the implantation in the biodegradable group (3–3 animals). Differential scanning calorimetric examination was performed in all esophagus samples. Focal erosion of the esophagus segments was more explicit in the nitinol group at the histology. On the 7^th week all of the biodegradable stent were in the stomach and on the 12^th week these were completely solved. DSC examination showed significant alterations in the structure of the esophagus in both stented group compared to the healthy control. This experiment showed that the new self-expandable stents are safety and suitable procedure without deterioration of the esophageal wall. According to our DSC results the thermal denaturation of intact esophagus, its mucosa and muscle fragments revealed significant differences compared to healthy sample in favour the new biodegradable stent. Safety and efficiency in the experimental model had encouraged us to apply this method successfully patients with bleeding esophagus varices. The long term goal is to show that stent placement could be an effective way of decreasing or stabilising the acute bleeding from ruptured esophagus varices in cirrhotic patients.     

基于访问代理的数字化校园应用整合研究

采用基于访问代理模式,实现对不开放数据库的应用系统的整合.其方法是:通过系统访问代理将用户从门户网站上登录的用户名和密码转换成用户有权限访问的各个系统的用户名、密码及权限,从而实现应用系统的整合,该方法高效、安全经济、实用性强.