行波管电子枪热状态模拟和分析

建立行波管电子枪区热状态分析模型，利用ANSYS软件对行波管电子枪的热状态进行了模拟和分析。通过改变电子枪内部的一些结构参数和工作环境参数，特别是栅控行波管的栅极结构尺寸和加载功率的变化，由模拟得到不同条件下电子枪热状态分布，为电子枪的优化设计和合理使用提供了参考。     

可编程控制器(PLC)在泥炮控制中的应用

泥炮是炼钢厂中控制炼钢炉钢水出口的一部分设备，系统较庞大，工序较复杂，用常规控制较难实现，而采用PLC可对其进行控制。该系统共有38点数字量入、33点数字量出、1路模拟信号(压力)，采用三菱公司的FX2系列PLC。由于该系统工艺的复杂性、特殊性，在控制软件的编制上并没有统一采用梯形图编程法，而是采用梯形图编程法与状态转移图编程法相结合的方法，这样大大提高了软件的可编性、可调性、可读性。用状态转移图法编程不用特意考虑就解决了系统在设定压力点附近的抖动问题，而用梯形图法编程则必须特别小心，否则很易使系统在设定点附近抖动起来，通过调试与运行充分体现了这种编程方法的实用性与PLC的可靠性、可维修性、可修改性。     

Electron gun for SSRF

A 100 kV triode-electron-gun has been designed and manufactured for the Linac of Shanghai Synchrotron Radiation Facility (SSRF). In this paper the performance of the gun and some key components are described.     

小油量气化煤粉燃烧系统在205 t/h锅炉上的应用

介绍了小油量气化燃烧直接点燃煤粉燃烧系统工作原理、系统构成，重点介绍了小油量气化煤粉燃烧系统工业性应用试验研究及经济性分析。试验结果表明，小油量气化燃烧直接点燃煤粉燃烧系统性能稳定，能实现机组冷、热态启动及低负荷稳燃，经济效益显著，达到了工业应用条件。     

AH-1型全自动吸枪式氦检漏仪的研制

研制与生产目前国内最长(15 m)吸枪式氦检漏仪.在计算与实验研究的基础上设计与制造180°磁偏转分离型电子轰击离子源及逆流小孔分流型的AH-1型全自动吸枪式氦检漏仪的整体结构.在吸枪上配制有可操作与控制的微型显示仪表.它的特点是:启动时间短、灵敏度高、反应时间快等.因而是大型容器与高压容器检漏的理想仪器.文中介绍了设计的要点及现场实用范例.     

高炉液压泥炮故障分析与对策

液压炮是维系高炉生产的重要设备 ,对济南钢铁集团总公司第一炼铁厂液压炮不同故障情况进行分析 ,并制定相应故障解决对策 ,从而有效地保证了液压炮稳定运行 ,保证了高炉的正常生产。     

Nanotip electron gun for the scanning electron microscope

Experimental nanotips have shown significant improvement in the resolution performance of a cold field emission scanning electron microscope (SEM). Nanotip electron sources are very sharp electron emitter tips used as a replacement for the conventional tungsten field emission (FE) electron sources. Nanotips offer higher brightness and smaller electron source size. An electron microscope equipped with a nanotip electron gun can provide images with higher spatial resolution and with better signal-to-noise ratio. This could present a considerable advantage over the current SEM electron gun technology if the tips are sufficiently long-lasting and stable for practical use. In this study, an older field-emission critical dimension (CD) SEM was used as an experimental test platform. Substitution of tungsten nanotips for the regular cathodes required modification of the electron gun circuitry and preparation of nanotips that properly fit the electron gun assembly. In addition, this work contains the results of the modeling and theoretical calculation of the electron gun performance for regular and nanotips, the preparation of the SEM including the design and assembly of a measuring system for essential instrument parameters, design and modification of the electron gun control electronics, development of a procedure for tip exchange, and tests of regular emitter, sharp emitter and nanotips. Nanotip fabrication and characterization procedures were also developed. Using a "sharp" tip as an intermediate to the nanotip clearly demonstrated an improvement in the performance of the test SEM. This and the results of the theoretical assessment gave support for the installation of the nanotips as the next step and pointed to potentially even better performance. Images taken with experimental nanotips showed a minimum two-fold improvement in resolution performance than the specification of the test SEM. The stability of the nanotip electron gun was excellent; the tip stayed useful for high-resolution imaging for several hours during many days of tests. The tip lifetime was found to be several months in light use. This paper summarizes the current state of the work and points to future possibilities that will open when electron guns can be designed to take full advantage of the nanotip electron emitters.     

基于分形理论的RIFLE线表面磨损动态模型

根据实测数据得出分形维数D随着枪支发射子弹量变化的动态方程，并分析了尺度系数G的变化规律．应用分形几何理论和分形接触模型公式，建立了枪管RIFLE线表面磨损率与枪支发射子弹量之间的动态预测分形模型．其动态预测趋势与实验数据吻合．从而为枪管RIFLE线磨损的检测提供了新的思路。     

基于激光圆周扫描和定心修正的火炮身管内膛检测方法研究

火炮身管内膛的状态直接影响着火炮的射击精度和安全性,针对目前激光圆周扫描检测方法存在的定心 不准、激光束与管壁垂直度差等现状所导致的检测精度不高的问题,提出一种基于激光圆周扫描的通用口径火炮身 管内膛检测定心修正算法。通过校正管道和装置上的姿态传感器完成检测装置轴线与校正管道轴线的平行。修正装 置根据定心修正算法完成激光位移传感器旋转轴线与校正管道轴线的重合以及激光束与管壁的精确垂直,完成身管 内膛深度特征的精确测量。该修正算法及装置对于提高火炮身管检测精度和效率,研究身管剩余寿命和健康监测有 着重要的理论意义和实用价值。     

舰炮发射动力学模块化建模方法

在舰炮元件动力学方程的基础上,使用数值积分方法,并推广振动理论传递矩阵法,形成了舰炮发射动力学模块化建模方法——舰炮发射动力学离散时间传递矩阵法．该方法可模拟得到舰炮多体系统动力响应,仿真结果证明了该方法的有效性．