连续金属陶瓷膜F-S理论中相因子ρ_0的修正

利用氧化物颗粒增强金属基复合材料电阻率的三个计算模型 ,对连续金属陶瓷膜F S理论中相因子ρ0 进行了修正 .这个计算结果比原有的F S理论更接近实验结果     

黄铜铬酸表面膜的导电性

采用金属－膜金属结构测量了黄铜在铬酸中形成的表面膜的导电性。实验得到膜的导电性良好，虽为半导体，却表现出准金属行为这一瑟文献报导不同的结论。     

变频器速度调节在工业控制领域的应用

介绍了NGK唐山电瓷有限公司如何利用变频器实现对电气试验中电机变速调节的控制，探讨了与传统方式下电机速度调节相比变频器速度调节的优点。     

带均衡电抗器12脉波变压整流器仿真模型的研究

研究了带均衡电抗器的12脉波变压整流器仿真模型。详细分析了均衡电抗器在12脉波整流电路中的作用和工作原理,利用MATLAB软件提供的工具箱PSB建立了带均衡电抗器的12脉波变压整流器的仿真模型,用该模型对飞机电源系统进行了仿真。仿真结果表明,该模型可以使两组整流桥负载达到均衡,正确反映出均衡电抗器在系统中的作用。     

家庭装潢中的电器设计

就一些家庭电器的配置、选择和安装等进行了分析。     

室内10 kV母线弧光短路事故分析

文章对室内10kV母线弧光短路事故原因进行分析探讨，并提出了提高供电可靠性的预防措施。     

Intercellular communication in smooth muscle

The functioning of a group of cells as a tissue depends on intercellular communication; an example is the spread of action potentials through intestinal tissue resulting in synchronized contraction. Recent evidence for cell heterogeneity within smooth muscle tissues has renewed research into cell coupling.Electrical coupling is essential for propagation of action potentials in gastrointestinal smooth muscle.Metabolic coupling may be involved in generation of pacemaker activity. This review deals with the role of cell coupling in tissue function and some of the issues discussed are the relationship between electrical synchronization and gap junctions, metabolic coupling, and the role of interstitial cells of Cajal in coupling.     

From model to mimic: Age-dependent unpalatability in monarch butterflies

Monarch butterflies (Danaus plexippus) are unpalatable to various vertebrate predators because their larvae sequester bitter and emetic cardiac glycosides (CGs) from milkweed plants (Asclepias spp.). Here we show that the concentration of the defensive CGs decrease as individual butterflies age, regardless of the CGs' initial amounts or specific chemical structures. Consequently, individual monarch butterflies can change from being unpalatable models to palatable mimics during their lifetime. Since monarchs breed continuously over the spring and summer in North America, freshly emerged adult butterflies may serve as noxious models for older individuals which become automimics as they age.     

碳纤维增强混凝土的研究现状和发展

介绍了碳纤维增强混凝土近年来国内外的研究状况和应用实例，论述了碳纤维增强混凝土的力学性能和电学性能，并对发展趋势作了展望。     

用MATLAB软件对电动汽车的计算机模拟

提出了用先进的科学计算软件ＭＡＴＬＡＢ对电动汽车作计算机模拟的方法，充分利用了ＭＡＴＬＡＢ及其最新扩展的分支ＳＩＭＵＬＡＢ软件特有的人机对话方式的性能，根据由电动汽车各部件定义的功能框，通过菜单式的选择方式，使模拟过程具有很强的可观察性和适应性，且避免了传统计算机模拟的繁复编程过程，大大减少了工作量．此模拟方法可推广到各种动态系统，为电动汽车的设计与研制提供了参考