扫描速度对硼铸铁气缸套表面钨极氩弧硬化效果的影响

研究了钨极氩弧扫描速度对硼铸铁表面硬化效果的影响规律。结果表明：扫描速度增加,硬化层宽度、深度减小,而硬度提高,裂纹率增大；硬化层硬度沿层深的分布是从表及里由高而低,在过渡区下降缓慢；沿层宽的分布是层中心最高,向两侧逐渐降低,直至硼铸铁基体达到最低值；在保证不出现裂纹的条件下,硬化层表面的最高硬度值可达61．4HRC,硬化层最高显微硬度值可达1156．4HV0．1；硼铸铁材料采用氩弧热源淬火时,淬硬层与基体之间过渡区明显,硬化区组织为莱氏体,过渡区为马氏体、残余奥氏体和少量石墨。     

CAPP发展趋势及面临的问题

阐述了CAPP的发展历程，并从不同角度对CAPP进行了分类。在分析国内外CAPP发展现状的基础上，提出了CAPP的“智能化”、“工具化”、“集成化”和“基于Internet全球化”等发展趋势。结合国内CAPP的应用现状，讨论了当前国内CAPP所面临的诸多问题：研究与开发有较大片面性；应用范围过于狭窄；对系统化、实用化、工程化研究重视不够；重表现形式，对工艺数据本身重视不够；工艺的规范化、标准化程度很低。     

声表面波力敏传感器的研究

本文分析了声表面波（ｓｕｒｆａｃｅａｃｏｕｓｔｉｃｗａｖｅ简称ＳＡＷ）力敏传感器加载后，频率稳定性变差的原因。在此基础上，设计了一种新型的采用等应力加载的力敏传感器，计算了该传感器的灵敏度，并给出了该传感器的频漂实验和力—频特性实验结果，为传感器的实际应用打下了基础。     

Microstructure of Laser Processed T10 Carbon Tool Steel

The microstructure of the laser melted 1.0%C tool steel have been investigated.The region affectedby the laser can be subdivided into 3 zones,which consist of a melted region at the surface,a zonewith solid state transformation and the area adjacent to the unaffected substrate where cementite isslightly dissolved.The melted zone possessed a cellular growth morphology consisting of austeniteand martensite.The carbon content of the austenite was measured to be over 1 wt-%.A great deal ofretained austenite and twinned martensite were found in the first two zones(the melted and solidtransformed).     

新型液体中双调制式石英晶体传感器系统的研制

传统的调频式石英晶体传感器无法区分引起频率变化的两种不同负载效应，介绍一种新型液体中双调制式石英晶体传感器系统，讨论了传感器谐振电路、液体测头结构及采集系统的设计。实验表明，该传感器在液体中３个小时频率稳定度达到±５Ｈｚ，幅值达到±２．５ｍＶ，液体的高度对传感器输出基本没有影响。     

Miller Fisher anti-GQ1b antibodies: alpha-latrotoxin-like effects on motor end plates

In the Miller Fisher syndrome (MFS) variant of the Guillain-Barré syndrome, weakness is restricted to extraocular muscles and occasionally other craniobulbar muscles. Most MFS patients have serum antibodies against ganglioside type GQ1b of which the pathophysiological relevance is unclear. We examined the in vitro effects of MFS sera, MFS IgG, and a human monoclonal anti-GQ1b IgM antibody on mouse neuromuscular junctions (NMJs). It was found that anti-GQ1b antibodies bind at NMJs where they induce massive quantal release of acetylcholine from nerve terminals and eventually block neuromuscular transmission. This effect closely resembled the effect of the paralytic neurotoxin alpha-latrotoxin at the mouse NMJs, implying possible involvement of alpha-latrotoxin receptors or associated downstream pathways. By using complement-deficient sera, the effect of anti-GQ1b antibodies on NMJs was shown to be entirely dependent on activation of complement components. However, neither classical pathway activation nor the formation of membrane attack complex was required, indicating the effects could be due to involvement of the alternative pathway and intermediate complement cascade products. Our findings strongly suggest that anti-GQ1b antibodies in conjunction with activated complement components are the principal pathophysiological mediators of motor symptoms in MFS and that the NMJ is an important site of their action.     

车轮的可靠性预测

车轮可靠性预测的主要目的是为了确定车轮的使用寿命 .用图解法对 1 0个车轮样本寿命试验结果进行分析 ,得出车轮的失效规律为威布尔分布 .因此 ,可采用威布尔概率纸对车轮的可靠性进行预测 ,得到疲劳寿命下的车轮的可靠度和用威布尔斜率表示的车轮失效分布形状 .使用该方法所得的分析结果与样本数量有关 ,样本数量越多 ,其分析的可靠程度越高 .     

悬架侧倾特性参数及动力学仿真

本文以S型轿车剪悬架系统为实例,利用ADAMS／Car模块,进行双轮反向激振动学仿真,仿真结果是各种侧倾特性参数,对照轿车标准系数,对S型轿车侧倾情况有一个全面了解,为设计和优化悬架系统提供了实用高效的方法。     

用于食品机械设计的AutoCAD定制技术

介绍了利用定制技术提高ＡｕｔｏＣＡＤ用于食品机械设计的绘图速度及质量的途径和方法；对适用于食品机械设计的系统变量、原形图、设计图形库和符号库以及用户绘图目录结构的定制技术进行了具体论述。