TiAl合金层片组织的瑞利分解现象及应用

ＴｉＡｌ合金层片组织具有相当好的室温断裂韧性和抗高温蠕变性能，但层片团中强烈的塑性各异性导致其室温塑性很低。研究了Ｔｉ－４６．５Ａｌ－２．５Ｖ－１Ｃｒ（ａｔ．％）合金层片组织发生瑞利分解（Ｒａｙｌｅｉｇｈ‘ｓＢｒｅａｋｄｏｗｎ）现象的热处理条件及σ２片间断对塑性的作用，实验发现，在一定温度区间进行循环热处理过程中，α２相的溶解析出相变能有效地强化瑞利分解现象，α２层片发生瑞利分解后，从４点弯曲实验     

深化应用WBS架构促进配网项目标准化管理实践

为更好地实现SG-ERP建设目标,促进配网标准化管理,无锡供电公司在深化应用江苏电力配网标准WBS架构的进程中,不断探索实践,以项目立项、设计、实施、竣工投运、转资、项目关闭和六大关键环节管控为重点,以系统限制和信息化考核为手段建立双重保障,有力地促进了无锡配网项目标准化管理和全过程监督管控能力。     

Determination of elemental composition of cement powder by Spark Induced Breakdown Spectroscopy

Measurement of the cement powder composition as a major building material is considered very important. In this paper the capabilities of Spark Induced Breakdown Spectroscopy (SIBS) as a new technique for analysis of cement powder are shown. The major and minor elements of cement such as Ca, Si, Fe, K, Mg, Al, Na, Ba, Ti, V, Pb, Mn and Sr are detected qualitatively. For quantitative measurement, calibration curves are prepared for elements Ca, Si, Mg, Al, Fe and K with limit of detection below 220 ppm. The critical problems such as how to achieve quantitative measurement and improve the detection limits are investigated. The potential and drawbacks of SIBS technique in comparison with XRF for analysis of powder products are discussed.     

Gas breakdown limit and maximum acceleration gradient for inverse Cherenkov laser accelerator

Laser intensity thresholds for CO₂ laser-induced gas breakdown, such as tunneling, multiphoton, and cascade ionization have been estimated for the inverse Cherenkov accelerator experiment at the Brookhaven Accelerator Test Facility. The gas breakdown is dominated by cascade ionization and the maximum acceleration gradient is up to 300 MeV/m for a 3 ps CO₂ laser.     

微型计算机在瞬态电波波形测试中的应用

介绍了微型计算机在对瞬态电波波形进行自动采集，存贮，处理及显示中的应用，且提出了一种典型的测试系统的总体方案及其硬，软件设计，该系统具有良好的人机界面，操作方便灵活，测试的准确度，可靠性较高。     

实施《JJG795-2004耐电压测试仪试行检定规程》的几点探讨

本文对于JJG795-2004《耐电压测试仪试行检定规程》中有关耐压测试仪输出电压、击穿报警电流误差及电压持续保持时间的检定方法谈几点探讨意见。     

数控压力机故障概率分布研究

开发了分析数控机床可靠性的专用软件。建立了数控压力机的操作和维修数据库。故障数据验证了数控压力机故障分布符合指数分布 ,并给出了数控压力机可靠性特性的计算方法。     

万家寨引黄工程总干线三级泵站弦式应变计预埋故障分析

观测仪器预埋在混凝土后，其事故发生的概率尽管很小，但其发生将无法使安全监测等工作顺利进行，本文分析总干线三级泵站弦式应变计施工后无法读测的原因，供以后解决类似问题参考。     

Titanium nitride electrodes for micro-gap discharge

Titanium and titanium nitride (TiN) were used as thin film electrodes for a micro-gap discharge device. The titanium electrodes were fabricated by sputter deposition of pure titanium accompanied with a lift-off process. The TiN electrodes were prepared by nitriding the titanium electrodes with nitrogen plasma. Gas discharges between the electrodes at various argon pressures were characterized and their breakdown voltages were compared. Both the titanium and TiN electrodes have a minimum breakdown voltage about 220 V at a pressure spacing product (P·d) of 0.8 mbar·cm. The nitrided electrodes were more durable than the as-deposited titanium electrodes upon a DC discharge for 5 s or 200 cycles of electrostatic discharge.