指数分布下加速寿命试验的统计分析

在产品寿命服从双参数指数分布的情形下,研究定数截尾恒加速寿命试验的可靠性统计分析问题,给出了正常应力水平下产品可靠性指标的估计方法.     

Transmission line realization of subwavelength resonator formed by a pair of conventional and LHM slabs

INTRODUCTION Left-handed materials (LHMs), first investigated theoretically by Veselago (1968), have received sub- stantial attention in the scientific and engineering communities. The unique properties of these meta- materials are promising for a diversity of microwave applications, such as new types of beam steerers, modulators, filters, superlens (Pendry, 2000), cou- plers and antenna radoms (Smith et al., 2004). Re- cently, a transmission line (TL) approach has been successfully in…     

雨介质的介电常数模型及其参数估计

得出了电磁波在有耗介质中衰减分贝数的表达式,将这种衰减与文献资料相结合,建立了雨介质对电波衰减的等效介电常数的系统辨识模型,得到了该介电常数与降雨率、电波频率的函数表达式。在电波的衰减上,模型所得结果与文献[8]所给结果完全一致,表明了模型的正确性。本章所用方法简单明了,为研究随机粒子对电磁波的衰减提供了一条新的途径。     

股份有限公司董事对第三人的损害赔偿责任

董事因故意或者重大过失对第三人的损害赔偿责任,我国《公司法》对此缺乏一般性规定,这对于未上市的股份公司的第三人利益保护是非常不利的。分析我国股份公司董事对第三人赔偿责任立法现状及其不足,认为应当通过公司法做出诸如股份公司董事对包括债权人在内的第三人损害赔偿责任的原则性规定、区分不同种类董事的赔偿责任以及改进董事责任保险制度、完善股东诉讼机制和导入债权人派生诉讼制度等措施来适度强化董事民事责任,保护第三人利益,实现公司相关者利益的合理平衡,最终促进经济发展。     

论建立司法赔偿诉讼程序——以二元交叉型审理制度为核心

现阶段司法违法行为受害人在获得国家赔偿时存在着申请难、决定难、执行难的问题，究其原因是多方面的。但现行司法赔偿程序正当性的缺失则构成了不容置疑的制度性障碍。现行《国家赔偿法》对司法赔偿程序的设计是一种非诉讼决定程序，就其属性而言应为行政程序。为此，以二元交叉型审理制度为核心来建立司法赔偿诉讼程序可以很好地解决这一问题。具体表征为由行政法院审理普通法院违法司法行为导致的司法赔偿案件；而由普通法院审理行政法院、检察机关、公安机关和监狱管理机关的违法司法行为导致的司法赔偿案件。     

关于厂长(经理)离任经济责任审计的探讨

本文就如何处理离任审计的矛盾、把握审计的内容、注意审计的方法及其他一些相联因素等方面进行探讨。从可操作性、可借鉴性出发，给出了在离任审计中的一些具体处理方法与技巧，供大家探讨。     

电流变液阻尼器密封装置的设计

电流变液阻尼器的密封是阻尼器设计中的关键技术,该文利用在流体机械中的应用较多的螺旋密封,并对其作用原理和设计方法进行研究和论证;通过Matlab优化工具箱软件进行参数的最优化,从而得到一种对各种参数均进行优化的完整方案。     

催化剂研究中的分散阈值参数

分散阈值的大小与活性组分和载体相互作用有关，是催化剂研究中的一个重要实验参数，分散阈值的测定不仅为单层分散原理广泛的应用奠定了实验基础，亦为催化剂的研制提供一种定量研究手段     

Modeling of D-STATCOM in distribution systems load flow

This paper presents modeling of Distribution STATCOM (D-STATCOM) in load flow calculations for the steady- state voltage compensation. An accurate model for D-STATCOM is derived to use in load flow calculations. The rating of this device as well as the direction of required reactive power injection for voltage compensation in the desired value (1 p.u.) is de- rived and discussed analytically and mathematically by the phasor diagram method. Furthermore, an efficient method for node and line identification used in load flow calculations is presented. The validity of the proposed model is examined by using two standard distribution systems consisting of 33 and 69 nodes, respectively. The best location of D-STATCOM for under voltage problem mitigation approach in the distribution networks is determined. The results validate the proposed model for D- STATCOM in large distribution systems.     

Crossbreeding parameters for fertility traits in a rotational crossbreeding between Landrace and Piétrain pigs

The reproduction characteristics of 343 sows in six different breeding groups were analyzed to estimate the crossbreeding parameters. The results indicated that the ovulation rate and the weights of uterus and ovary are mainly determined by the additive genetic effects while the nonadditive genetic effects play an important role in embryonal traits and litter performance. The heterosis effects in the first litter are larger than those in the second litter because of heterosis x environment interaction. The results also showed the existence of a highly significant maternal heterosis effect on the fertility traits of sows.