脊波导宽频带电磁参数测试技术

针对高损耗介质材料电磁参数的宽频带测试问题,提出了利用脊波导进行测试的新方法,建立了电磁参数测试系统,并采用TRL技术进行了系统校准。该方法仅用3个波段的脊波导即可覆盖2.0～18.0GHz宽频带范围内的电磁参数测试,具有频带宽、体积小、测试精确度高等优点。     

开设化学设计性实验的探索与实践

阐述开设设计性实验的意义,并在实践的基础上,给出了开设化学设计性实验的方案,总结了开设设计性实验的体会。     

几种药剂对石榴“麻皮“病的防治研究

2002～2003年,在会理县彰冠乡和海潮乡,对石榴“麻皮”病进行了化学防治试验,试验结果表明:大生M-45、信生交替使用;春雨一号、达柯宁、阿米西达交替使用防效最好。     

低浓度三分子反应模型双曲型反应－扩散方程的稳定性与化学振荡

考虑浓度扩散和扩散流随时间的变化，得到低浓度三分子反应模型的双曲型反应－扩散方程；讨论了方程的稳定性及存在行波解的条件，得到了化学振荡的色散关系和相速度．     

用声学测量预报等温淬火球墨铸铁强度

等温淬火球墨铸铁的机械性能与其声学性能相关。本文将两种碳当量球铁在８４５，８９９和９４５℃温度进行奥氏体处理，在２６０，３１６和３７１℃温度进行等温淬火得到证实。声学性能测量包括共振频率，声速和内耗。由共振频率转换成动态模量表示出这种关系可以用来预报球墨铸铁不同热处理条件下的机械性能。     

酚酞型聚醚砜膜的制备与性能研究

本文利用水相沉淀聚合法成功地合成了丙烯腈(AN)-(二丙烯酰胺基)-二甲基丙烷磺酸(AM PS)共聚物,然后将其作为添加剂制备酚酞型聚醚砜膜,并进一步研究了添加剂用量对膜通量,膜截留率以及膜形态的影响.研究表明,随着添加剂用量的增加(从0到5%),膜在100 kPa下的水通量从230 L/m2.hr下降到125 L/m2.hr,对PEG 35000的截留率分别从0.5528增加到0.75.另外,利用场发射电子显微镜观察了膜断面,发现随着PAN-co-AM PS含量的增加,膜表皮层逐渐变厚,指状孔逐渐减少.     

Proportional reversed hazard rate model and its applications

The purpose of this paper is to study the structure and properties of the proportional reversed hazard rate model (PRHRM) in contrast to the celebrated proportional hazard model (PHM). The monotonicity of the hazard rate and the reversed hazard rate of the model is investigated. Some criteria of aging are presented and the inheritance of the aging notions (of the base distribution) by the PRHRM is studied. Characterizations of the model involving Fisher information are presented and the statistical inference of the parameters is discussed. Finally, it is shown that several members of the proportional reversed hazard rate class have been found to be useful and flexible in real data analysis.     

彩票的法学解析

彩票是国家为筹集社会公益资金而发行的供人们自愿购买并据以取得获奖机会的凭证。汇集闲散资金,造福社会公益事业,是彩票的本质特征,也是彩票的道德生命和法律生命所在。彩票具有国家性、财产性、合同性、社会性等法律性质。彩票运作中包含着多重法律关系,其核心问题是发行人与购彩人之间的权利、义务如何配置。     

Emergent and effective properties in ecology and evolution

Emergent properties are often discussed in arguments concerning relationships among different levels. However, the different definitions of emergent properties sometimes confuse the arguments about macro-level phenomena, since some authors regard emergent properties not only as observable global patterns but as properties that affect and cause change in ecological and evolutionary processes. Thus it is important to distinguish higher-level or larger-scale properties that can influence particular ecological and evolutionary processes from those that cannot. I call the former properties effective properties. I gave examples that show why the distinctions between effective and non-effective properties are important.     

试论日军在常德会战中使用化学武器的问题

日军在侵华战争期间,无视国际公约(法),在战场上频频使用化学武器,致使众多中国军民伤亡。大量史事证明,在1943年11月初至12月底的中日常德会战中,由于日本华中派遣军在作战中多次实施毒气(弹)攻击,致使中国第六、第九战区的参战部队伤亡惨重。此战中“日军使用毒气次数之多,为抗战以来所仅见”。