在系统可编程模拟器件在智能雷预处理电路中的应用

在系统可编程模拟器件是近期出现的新型可编程模拟器件，它的问世将在系统可编程技术的应用由数字电路领域拓展至模拟电路领域。介绍了在系统可编程模拟器件的结构特点和工作原理，并利用isp—PAC10设计出智能雷探测系统的预处理电路。仿真结果表明，采用ispPAC10设计的预处理电路频率特性比较理想，系统的稳定性与可靠性高。ispPAC还可反复编程，电路修改方便。     

舟桥丙丁接头接触分析的计算机模拟

深入考察接触行为的特点，并以舟桥纵向连接件丙丁接头为例，建立了两种接触计算模型。采用大型通用有限元程序进行分析，模拟丙丁接头受力时的应力应变。与经验合成计算结果和常规有限元分析的结果进行对比，证明接触分析方法对连接件塑性变形、疲劳分析和优化设计有重要的指导意义。     

数字化天气雷达强度标定方法

数字化天气雷达的组网观测是天气雷达发展的必然趋势，现有数字化天气雷达提供的强度场必须经过强度标定后再用于组网，因此迫切要求制定数字化天气雷达标定方法。指出了使用标定方程时应注意的量纲问题，针对有关文献中存在的问题提出了解决方法。     

TiCl2-NH3·H2O液体发烟剂红外衰减性能实验

烟幕技术是现代战场效费比最高的光电对抗手段，其干扰效果依赖于烟幕的组成成分。对基于四氯化钛-氨水体系液体发烟剂布设的烟幕的红外衰减性能进行了研究，发现在适宜条件下，烟雾呈中性，同时对3～5μm和8～12μm红外辐射的衰减率可分别达到65％和90％。当靶温在34℃～73℃之间变化时，烟幕对8～12μm红外辐射的衰减率均高于90％，对3～5μm红外辐射的衰减率随靶温升高而降低。     

Evolution of the South China Sea and monsoon history revealed in deep-sea records

As the third summary report of ODP Leg 184 to the South China Sea (SCS), this paper discusses the evolution of the East Asian monsoon and the SCS basin. A multi-proxy approach, involving geochemistry, micropale-ontology, pollen and other analyses, was adopted for reconstructing the evolutionary history of the East Asian monsoon, which was characterized by a series of paleo-climate events especially at 8, 3.2, 2.2 and 0.4 Ma. The new record indicates similar stages in the development of the East and South Asian monsoons, with an enhanced winter monsoon over East Asia being the major difference. The rich spectrums of monsoon variability from the southern SCS also reveal other characteristic features of the low latitude ocean. Evidence for the evolution of the SCS includes the hemipelagic Oligocene sediments, implying the existence of deep water environments during the early seafloor spreading stage of the SCS basin. The four major unconformities and some remarkabl ediagenetic features in upper Oligocene deposits indicate the strongest tectonic events in the region. From a careful comparison of lithologies and sedimentation rates, we conclude that the prominent differences in sedimentary environments between the southern and northern SCS were established only by ～3 Ma.     

Inhibitory effect of the adenovirus type 5 E1A protein expressed in the yeast system of the human tumor cell growth

Adenovirus 5 type E1A as a tumor suppressor gene can inhibit tumor growth and enhance the censitivity of chemotherapy and radiotherapy.E1A have the ability to integrate into the host genome,resulting in long-time expres-sion that induces Rb gene inactivation and animal cells im-mortalization.This prompted us to select the E1A protein for treatment of cancer in order to overcome the limitations of E1A gene therapy.Thus,we firstly comstructed E1A eu-caryotic expression vector (pPIC9/E1A),transformated the pichia pastoris yeast cells(GS115) and screened the high-expressing recombinant strains.The positive yeast strains were cultured in the shake flask,and induced for 3d.The crude E1A protein was purified using two steps of col-umu chromatography on HiTrap Q and HiTrap SP.The pu-rified E1A protein was identified by SDS-PAGE and Western blot.E1A protein was mostly located at cellular unclear when Cheriot delivered E1A protein into cells.The analysis in vitro indicated that the E1A protein arrested LN686 cell cycle at G2/M phase,and significantly inhibited the growth of LN686 tumor cells.The current studies firstly provided an experimental basis to further develop E1A protein for tumor treatment.     

改变水分子簇的结构及诱发的生物效应研究

概述了水分子簇理论研究的基本状况,以及改变水分子团簇结构的4种方法,包括外加磁场、外加电场、激光辐射以及直接加热法;最后简要介绍了改变水分子团簇结构所诱发的生物效应.     

两类自反有向平衡不完全区组设计的存在性

给出了一个递归构造，并且应用这个递归构造给出了区组长为4，v≡2（mod12)和v≡6（mod 12)的SCDB（4，3；v)；这相当于上述两类结构存在性的证明。     

基于网络的多媒体课件的交互设计与实现

基于网络的多媒体课件必须具备交互性的特点，以实现学生与计算机、教师与学生的交互功能，探讨了课件人机交互、教学交互的几种交互方式的设计思路和制作方法，并阐述了基于WEB的B／S模式体系结构的课件设计技术。     

环境教育与化学教学相结合的实践途径

根据中专学校的特点,通过必修课、选修课和课外活动等不同教学形式,使环境教育与中专化学教学相结合,不断提高学生的环保意识和参与能力。