乙苯甲喹唑啉酮盐酸盐合成方法的改进

以邻乙酰氨基苯甲酸为原料，在POCl3作用下与2－乙基苯胺缩合得3－（2－乙基苯基）－2－甲基－4－（3H）－喹唑啉酮盐酸盐，其条件为：以甲苯为溶剂，邻乙酰氨基苯甲酸与2－乙基苯胺摩尔比为1：1，反应时间3h，产物收率为80％。     

Single event transient characterization of SiGe HBT by SPA experiment and 3-D process simulation

Science China Technological Sciences - The single-photon absorption induced single event transient in the silicon-germanium heterojunction bipolar transistor is investigated. The laser wavelength...     

φ430×4复合齿轮箱的润滑

本文介绍了由４３０×４复合齿轮箱的润滑状况和润滑油粘度的确定，并根据弹性流体润滑理论计算膜厚比，分析润滑状态，选择润滑油。     

Membrane Surface Nanostructures and Adhesion Property of T Lymphocytes Exploited by AFM

The activation of T lymphocytes plays a very important role in T-cell-mediated immune response. Though there are many related literatures, the changes of membrane surface nanostructures and adhesion property of T lymphocytes at different activation stages have not been reported yet. However, these investigations will help us further understand the biophysical and immunologic function of T lymphocytes in the context of activation. In the present study, the membrane architectures of peripheral blood T lymphocytes were obtained by AFM, and adhesion force of the cell membrane were measured by acquiring force–distance curves. The results indicated that the cell volume increased with the increases of activation time, whereas membrane surface adhesion force decreased, even though the local stiffness for resting and activated cells is similar. The results provided complementary and important data to further understand the variation of biophysical properties of T lymphocytes in the context of in vitro activation.     

纤维桥联对陶瓷基复合材料断裂韧度的影响

基于最弱链接统计分析,建立复合材料纤维桥联力学模型,研究纤维桥联对陶瓷基复合材料断裂韧度的影响.模型同时考虑完整纤维桥联和断裂纤维拔出桥联机制.利用纤维桥联力学模型计算纤维桥联应力/位移关系和纤维增韧陶瓷基复合材料裂纹扩展阻力曲线.计算结果显示, 完整纤维桥联最大应力大于断裂纤维拔出桥联最大应力,但是完整纤维桥联作用距离远小于断裂纤维拔出桥联作用距离.裂纹扩展阻力主要由断裂纤维拔出桥联提供.纤维基体摩擦力τ越小,裂纹扩展阻力曲线平台值越高.纤维半径r的变化引起的裂纹扩展阻力平台值的变化不大.     

Flexsim仿真平台中的GUI与SQL Server数据库的连接方法研究

本文针对目前在Flexsim仿真平台中处理数据繁琐的缺点,研究了通过ODBC实现Flexsim与SQL Server的连接,提高了仿真的效率,并通过实例具体介绍了为模型和实体定制特定的GUI方法,并通过此GUI实现与SQL Server和实体属性的连接。     

电力系统光纤传输网络在线监测系统的设计分析

提出了1种利用光时域反射仪测试技术,结合波分复用技术、全球定位技术的电力系统光纤传输网络在线监测方案,为电力系统通信调度部门对光纤传输网络的日常维护提供了一个自动化的监测维护平台。     

数据采集系统的可测性研究

数据采集系统是测控仪器的核心部分，要提高系统的可用度和可靠度，检测和诊断是其重要环节。文章在分析典型数据采集系统结构的基础上，研究了实现输出控制接口测试，数据采集回路的闭环自测试设计方法，提出了冗余设计是实现数据采集模块自测试与自诊断的主要方法与技术。针对典型数据采集系统所存在的不可靠，速度低以及通道之间不能进行瞬时比较等缺点，给出了并行多通道数据采集系统的实现技术并利用此技术进行道间校正，测试和