Site occupations and ordering behaviour of O phase in Ti2AlNb—based intermetallics

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｏｒｔｈｏｒｈｏｍｂｉｃａｌｌｏｙｓａｒｅｏｆｇｒｅａｔｔｅｃｈ ｎｏｌｏｇ ｉｃａｌｉｎｔｅｒｅｓｔｉｎｈｉｇｈｔｅｍｐｅｒａｔｕｒｅａｐｐｌｉｃａｔｉｏｎｓｓｉｎｃｅｔｈｅｙｈａｖｅａｇｏｏｄｂａｌａｎｃｅａｍｏｎｇｓｔ     

基于CAE分析的汽车制动液罐注射模设计

分析了汽车制动液罐注射件的结构特点,使用Moldflow软件对制品的注射成型过程进行CAE分析,确定了模具的浇注系统和成型工艺条件。模具为三板式点浇口结构,采用嵌件抽芯、斜导柱抽芯和液压抽芯相结合的方式实现模具的抽芯要求,并在此基础上完成了模具设计。     

HDTMA改性沸石吸附水中Cr（VI）研究

摘要：研究以阳离子表面活性剂HDTMA改性天然斜发沸石,制得HDTMA改性沸石,进而研究HDTMA改性沸石对废水中Cr（VI）的吸附特征。结果表明：HDTMAL改性沸石对cr（VI）吸附符合Langmuir等温式和拟二级动力学方程,饱和吸附量为10．99mg／g,吸附主要为化学吸附,但温度、pH值和干扰离-~HDTMA沸石吸附cr（VI）具有明显影响。     

金属铕制备工艺的研究

本文采用正交实验的方法,研究了金属铕的制备工艺条件。实验结果表明,还原－蒸馏温度１１００℃,还原剂过量系数０．３,保温时间１．５小时,金属铕的纯度大于９９．９％,直收率大于９０％     

DSP人机接口电路设计

对TMS320F2812型数字信号处理器的硬件资源和相应的外部设备进行了详细的介绍,分析了19264液晶显示器的接口电路、控制系统,以及按键的结构.在此基础之上,利用TMS320F2812型数字信号处理器的GPIO口对按键电路和液晶接口电路进行了设计,通过调试和仿真后发现本方案可行.     

常压H2气氛烧结W-TiC合金的致密化行为和性能

采用粉末冶金方法在常压H2气氛下制备W-TiC合金,研究W-TiC合金的烧结致密化行为,并对合金的性能和组织结构进行分析.结果表明:添加微量强化烧结元素可改善W-TiC合金的烧结活性,在1700℃烧结120min后其相对密度达到99.2％;随着烧结温度的升高,W-TiC合金的拉伸强度提高,在2000℃烧结120 min...     

Influence of residual chirality on the conformation and enzymatic degradation of glycopolypeptide based biomaterials

Science China Technological Sciences - Glycopolypeptides as analogs of glycoproteins or glycosaminoglycans represent attractive building blocks for the construction of biomimetic biomaterials....     

基于中间件规范的容侵应用服务器研究与实现

针对现有的容忍入侵应用系统的构建需要针对不同的业务类型进行不同的个性化设计和开发以及系统或部件的可重用性较差的问题,在研究基于规范的容忍入侵中间件方法的基础上,提出了一种基于拦截器的容侵中间件模型,从逻辑上将系统分为容忍入侵服务提供者和容忍入侵服务管理者,可在满足既有规范情况下实现用户应用的业务逻辑与容忍入侵特性所依赖的非功能性服务的分离。对涉及的容忍入侵框架、容忍入侵策略组件、安全群组通信管理器、安全群组通信系统等进行了详细设计,在一个开源的J2EE应用服务器JBoss中实现了对容忍入侵功能的支持,可利用Java类加载机制完成容忍入侵服务的动态加载。     

Nanorod heterostructures showing photoinduced charge separation

Size- and shape-dependent property modifications of semiconductor nanocrystals have been a subject of intense interest because of their potential for future engineering devices. The bandgap and related optical-property tuning of these materials are mainly governed by the nature of their band edges. In addition, fusing one type of nanocrystal over another enables further control of material properties that are dependent on the relative alignments of their energy levels. On a molecular scale, the synthesis of supramolecular compounds has inspired advances in theories for photoinduced charge transfer. Heterostructured nanocrystals potentially provide a nanoscale analog of such systems. A method for preparing heterostructured nanocrystals of complex morphologies showing photoinduced charge separation is presented. It is shown that the energy and lifetime of the charge-transfer photoluminescence band can be tuned by changing the relative alignment of band edges in CdSe/CdTe heterostructure nanorods. The long-lived charge transfer states in these type II semiconductors may make them attractive for photovoltaic applications.