DCS系统控制逻辑与联锁的分析及改进

针对DCS系统（分散控制系统班制逻辑、联锁上出现的问题进行分析和解决，阐述了完善改进控制逻辑的方法，提高了设备稳定运行。保证了机组长周期安全经济运行。     

High performance series-resonance energy-recovery circuit for plasma display panel

A new high performance series-resonance energy-recovery circuit (ERC) for a plasma display panel (PDP) is proposed. Two different ERCs are used for both sides of the PDP, and the slow falling and fast rising times are employed. Therefore, it features the zero voltage switching, low electromagnetic interference, low current stress, no severe voltage notch, and high energy-recovery capability.     

PLC在水泵综合试验台控制系统中的应用

针对目前水泵综合试验台及其在试验过程中所存在的问题,结合试验台及试验过程中所要控制的对象及其工艺要求,提出了一种基于PLC控制和变频调速技术的综合试验台自动控制方案,并且根据试验工艺要求,给出了PLC控制及变频调速系统的硬件配置及软件设计。     

中国(大陆)粉末冶金零件行业2004年进展

本文介绍了中国（大陆）粉末冶金零件行业2004年的生产概况与市场动向。阐述了粉末冶金汽车零件的市场动态。分析了中国（大陆）粉末冶金零件行业面临的挑战。介绍了美国APMI International的PMT认证。     

生物脱氮技术处理废水的应用实践

对废水生物脱氮工艺的开工调试进行了分析,通过对污泥的培养、驯化、使活性污泥达到最佳的污水处理状态。对在调试过程中出现的问题提出相应的改进措施,进一步降低了外排水生化指标。     

电子交易系统中文本安全传输方案的研究

为了提高电子交易系统中文本传输的可靠、快速、保密、安全性能，本文提出了一套基于SET协议、采用散列函数SHA计算消息摘要、将椭圆曲线公钥算法和AES私钥算法相结合，实现对电子文本加密、解密、签名及验证等功能的解决方案。文中阐述了从算法设计到方案实现的具体过程。     

级数sum from n=1 to ∞(α(α-1)…(α-n+1)x~n/n!)在x=±1处的敛散性研究

用比较原则及莱布尼兹判别法对函数f(x)=(1+x)α的马克劳林级数在x=±1的敛散情形给予讨论.     

“两课”改革必须处理好的几个问题

长期以来，两课的教学效果不尽如人意，这既有两课的课程设置和教学内容选择方面的问题，也有教学的方式方法问题。只有正确处理好“做人的学问”和“做事的学问”；马克思主义理论与人文素质教育；国家意志和学生需要；教学与科研等方面的关系，两课教学才能充分发挥其在培养具有中国特色社会主义事业的建设者和接班人中的应有作用。     

Dynamic deformation behavior of ultrafine-grained low-carbon steels fabricated by equal-channel angular pressing

The dynamic deformation behavior of ultrafine-grained low-carbon steels fabricated by equal-channel angular pressing (ECAP) was investigated in this study. Dynamic torsional tests, using a torsional Kolsky bar, were conducted on four steel specimens, two of which were annealed at 480 °C after ECAP, and then the test data were compared in terms of microstructures, tensile properties, and adiabatic shear-band formation. The equal-channel angular pressed specimen consisted of very fine, equiaxed grains of 0.2 to 0.3 μm in size, which were slightly coarsened after annealing. The dynamic torsional test results indicated that maximum shear stress decreased with increasing annealing time, whereas fracture shear strain increased. Some adiabatic shear bands were observed at the gage center of the dynamically deformed torsional specimen. Their width was smaller in the equal-channel angular pressed specimen than in the 1-hour-annealed specimen, but they were not found in the 24-hour-annealed specimen. Ultrafine, equiaxed grains of 0.05 to 0.2 μm in size were formed inside the adiabatic shear band, and their boundaries had characteristics of high-angle grain boundaries. These phenomena were explained by dynamic recrystallization due to a highly localized plastic strain and temperature rise during dynamic deformation.     

Effect of Hot Band Annealing on Magnetic Properties in 3% Si Grain‐oriented Electrical Steels

Hot band annealing is known to be a prerequisite for good magnetic properties irrespective of manufacturing methods in grain‐oriented Fe‐3 wt.% Si electrical steels. In this study, the effects of hot band annealing on magnetic properties were investigated in 3% grain‐oriented electrical steels of low soluble AI contents and one‐stage cold rolling. Microstructure and precipitate distribution were compared with hot band annealing conditions. Secondary recrystallization behaviour with hot band annealing condition was also discussed.