广域污染源水质实时自动监控系统

介绍一种广域污染源水质实时监控系统，主要介绍了系统的各个结构设计以及系统所实现的基本功能；该系统具有自动，可靠和稳定的特点。     

The Progress of a Microbeam Facility in the Institute of Plasma Physics

The progress of a microbeam facility in the institute of Plasma Physics was discussed in this paper.This kind of equipment can supply single-particle beam which may be implanted into cells in micrometer-radius and measured by a new outstanding detector among global microbeam systems.Measurements by some plain targets showed that the highest current after the accelerator tube can be larger than 20μA ,the H2^ current before the second bending magnet is near 0.9μA ,the current after the second bending magnet is near 0.8μA,and the current of the beam line(after a 2-mm diameter aperture)is near 0.25nA which is enough for the single-particle microbeam experiment.It took scientists 3 months to do their microbeam experiment after setting up the qccelerator beam line and get the microbeam from this equipment.Two pre0collimators were installed between the 2-mm diameter aperture and the collimator to survey the beam.Tracks on the CR39 film ectched in the solution of NaOH showed that the beam can go through the collimator including a 10μm diameter aperture and the 3.5μm thick vacuum sealing film(Mylar).A new method,which is called optimization of the beam quality,was put forward in this paper,in order to get smaller diameter of beam-spot in microbeam system.     

温度场的数值模拟法在干式电力变压器热设计中的应用

建立了干式变压器二维非稳态温度场的数学模型，采用有限差分布方法来求解变压器一相的温度场，分析计算了铁心，低压绕组，高压绕组的温升特性及整体温度分布和最热点位置。     

Probabilistic fatigue crack growth analysis of spot‐welded joints

This paper presents a probabilistic fatigue crack growth life prediction methodology for spot‐welded joints under variable amplitude loading history. The loading is multi‐axial and is obtained from transient response analysis of a vehicle model using finite‐element analysis. A three‐dimensional (3D) finite element model of a simplified joint with four spot welds is developed, and the static stress analysis of this joint is performed. Then the fatigue crack inside the base material sheet is modelled as a surface crack. Probabilistic crack growth model is combined with the stress analysis result to develop a probabilistic fatigue crack growth life prediction methodology for spot welds. This new method is implemented with MSC/NASTRAN and MSC/FATIGUE and is useful for the reliability assessment of spot‐welded joints against fatigue crack growth.     

CAN网络分布式可视对讲系统研究

通过对CAN网络、可视对讲CAN智能节点的分析,研究CAN网络分布式可视对讲系统.这种多主的网络结构在可视对讲系统中得到了充分应用,文章阐述了设计中的几个主要技术和思想,包括CAN控制器网络、可视对讲CAN智能节点设计、CAN节点软件设计,此系统网络在小区、智能大楼、医院、仓库等的安防监控中具有广泛的应用价值.     

渐开线齿轮点蚀位置的确定及其计算综合曲率半径的误差修正

依据赫兹强度理论 ,指出一对标准渐开线直齿齿轮啮合时 ,最大接触应力位于齿轮单啮合区靠近小齿轮处单双啮合区的分界线上。小齿轮点蚀发生在分度圆与齿根圆之间 ,大齿轮点蚀发生在分度圆与齿顶圆之间。并列举实例 ,证明目前传统设计方法计算点蚀处齿轮综合曲率半径误差较大 ,绘制出精确计算值与传统计算值的比值曲线 ,并给出结论 :传统设计方法得到的结果不安全 ,有误差 ;误差与齿轮模数无关 ,误差随着小齿轮齿数的增加渐小 ,误差随着齿轮齿数比的增大先渐大后渐小     

点荷法砂浆强度的简化换算公式

在GRC网格布加固空心砖砌体的受剪性能试验中，使用点荷法对144个砂浆试样进行了强度测试，通过与砂浆标准试件的抗压强度值相比较，表明点荷法是一种：隹确可靠的砂浆强度测试方法；文章对大量试验数据进行回归分析，提出了点荷法计算砂浆强度的换算修正公式，通过工程实践证明了该公式结论可靠，应用简便。     

一个支持进化的框架设计方案

提出了一个基于功能的模式化框架进化解决方案．该方案的基本思想是把业务对象的各个功能视为不同的热点(hotspot)，通过定义一系列的模式语言给出每个hotspot的定义规则及其对该规则的实现．开发人员根据新的业务需要可对模式语言进行修改，以此来解决框架的进化问题．最后介绍了应用该方案的一个实例．     

改善液晶电视机注塑模点浇口冲击磨损问题

为改善液晶电视机面壳注塑模具点浇口处因长期料流冲击、磨损造成的缺陷,对模具成型面进行局部表面热处理,提高局部材料的硬度和耐磨性。从注塑成型模具浇口结构和对模具材料的分析,说明改善液晶电视机面壳注塑模具点浇口具体处理的方法和产生的效果。     

双机架平整机组平整液斑迹综合治理技术开发

以梅钢1420双机架平整机组为研究对象,在对平整液斑迹形成原因进行深入分析的基础上,从管路改造与吹扫压力的优化、增强吹扫力度、喷梁与喷嘴角度的优化、接水装置的设计与安装、日常维护等五个方面入手,提出了一套适合于双机架平整机组的平整液斑迹综合治理技术,并将实应用到生产实践,取得了良好的使用效果,有效地清除了带材表面的平整液斑迹缺陷,提高了带材的表面质量,给现场创造了较大的经济效益,具有进一步推广应用的价值.