九牛造根中苯丙素类成分的分离及鉴定

目的研究九牛造根中的苯丙素类化学成分。方法采用硅胶柱层析和葡聚糖凝胶柱层析分离纯化技术,通过理化性质和波谱特征分离并鉴定化合物。结果分离并鉴定了3个苯丙素类化合物:3-甲氧基-4-羟基反式苯丙烯酸正十六醇酯(Ⅰ),短叶苏木酚酸乙酯(Ⅱ),3′(S)-当归酰氧基-4′(S)-千里光酰氧基凯林内酯(Ⅲ)。结论以上化合物均为首次从该植物中得到,其中化合物Ⅲ为首次从大戟科中分离得到。     

750t水驳采用气囊力式下水

水驳的建造相对来讲比较简单,但建造后如何下水成为我们修船厂的一个难点,采用重力式下水设备简单,同时具有安全方便操作等特点。     

两种血清铜兰蛋白测定方法的对照分析

报道了应用对苯二胺比色法（Sunderman^'改良法）与联大茴香胺比色法（Schosinsky^'测定法）同步测定矽肺患者血清铜兰蛋白的对照分析结果，结果表明两种方法分析结果基本平行一致，符合率81．9％，联大茴香胺比色法更为简便，且基质与反应物稳定，且基质与反应物稳定，精密度高。     

Validation of the Harshness Problem of Automotive Active Suspensions

The advantages of an automotive fully active suspension system have been promised for many years. Among them, simultaneously achieving good body and wheel mode damping is of the most fundamental. However, implementations of such concepts with hydraulic actuators have generally exhibit worse-than-passive harshness performance when such vehicles are driven through small irregularities on the road. Additional forces are transmitted through the hydraulic active suspension to the vehicle body at high frequencies. Conventional wisdom blames the non-ideal actuator in practice for the problem since most analytical papers assume it an ideal force-producing element. However, the mechanism of generating such excessive force as well as the methodology of solving it has not been systematically demonstrated in the literature. In this paper, a high fidelity mathematical quarter vehicle model is first developed and identified with vehicle test data. This model captures realistic dynamic behaviors of the hydraulic active suspension. The mechanism of creating such harshness problem is then explained with this model. To validate such mechanism, a frequency domain methodology that yields an equal-to-passive high frequency performance while maintaining a good active body behavior was developed based on this model and demonstrated with a test vehicle. The model predicts the test results almost exactly.     

一种网络多媒体教学软件开发的新方法

介绍一种网络多媒体教学软件开发的新方法。重点讨论了开发过程中多媒体、网络、数据库等技术。解决了课件开放性、单机运行和网络运行方面的一些问题。用Ａｕｔｈｏｒｗａｒｅ开发平台和文中介绍的方法，可一次性开发出单机版和网络版教学软件，极大地减少软件的开发费用。     

关于城市轨道交通的噪声

随着上海市轨道交通明珠线建设的开展,人们对城市上空开行轨道交通车辆提出了各种各样的疑问.总结起来主要有两个问题,即景观和噪声污染.     

基于信息技术的企业组织重构模式研究

从企业重构特点分析入手，结合组织变革的自身历史发展，在分析信息技术与组织重构关系基础上，指出面向信息系统管理组织将趋向于一种既集中灵活的柔性特征。     

单体小水线面水翼艇的概念设计

本文针地一般１１．９ｍ长的交通艇提出了单体小水互面水翼艇的设计方案。介绍了该艇的水翼配置与线型设计，以及艇的稳性和阻力计算。计算表明，设计艇具有良好的水动力性能。     

INVESTIGATIONS OF THE INFLUENCE OF TAPER CONTAMINATION ON THE FLYING CHARACTERISTICS OF A SLIDER

11ntroductionThesliderfliesovertherotationgdiskinaverylowclearancetohousethetransducercom-pletingthereadandwriteoperationproperly.Itisdisastrousifaslidercrashesdowntherotatingdiskinworkingstate,whichmaycausediskdamagesduetotheseriousfrictionbetweenthesliderandthedisk-Recently,itisdiscoveredthattheslidercrashiscloselyrelatedwiththetapercontamination[l'2'3J.Kurokawa,TakahashiandShinohara[l]believethattheliquefactionofor-ganicgasesonthetapersectionpreventsaparti-clefrompassing,sotheparticlestays…     

全肺灌洗术中,术后并发症的处理——附130例病例分析

对130例呼吸系疾病患者采用全肺灌洗(WLL)治疗,28例患者在术中、术后分别出现低氧血症、液气胸等并发症,发生率为21％。笔者认为只要在术前严格掌握手术适应症,在术中密切监护,术后详细观察,做到及时发现正确处理,都可以使患者症状缓解。