有限和式的积分放缩及应用

本文给出有限和式sum from k=1 to nf(k)的积分放缩的若干结论,并讨论其在求极限、证明不等式和无穷级数收敛性等问题中的应用。     

胸部创伤324例分析

对 32 4例胸外伤患者经抢救治疗后 ,除 1例锁骨下静脉吻合术患者术后死于急性肾功能衰竭外 ,其余均痊愈出院 .并对胸外伤患者抢救治疗原则进行了分析     

高中语文新教材得失评析

高中语文新教材体现了新大纲的改革精神,体现了教育观念的转变。与旧教材相比,更突出了“工具性”与“人文性”的结合,阅读能力培养与文学教育得到重视。作为试用教材,还存在不足之处。     

员工职业生涯中期阶段的危机管理

职业生涯中期,是个人生命运行中任务最重,压力最大,也是最能取得事业成功的时期.由于身心特征发生很大变化,职业--家庭--自我事务之间关系难于平衡,往往会出现职业生涯的危机,因此,必须采取得力措施加以应对,才能走出困境,实现自己的职业目标.     

合理预留安全矿柱的探讨

矿床地下开采时,在没有其他安全措施的情况下,不得不采用预留安全矿柱的方法,以保护地面建筑物、构筑物和主要井巷免受因地下采矿而引起的破坏。但这会导致矿量的损失,故需要寻找合理预留安全矿柱的方法。作者用解析的方法对预留安全矿柱进行研究,突破了常用的传统方法。     

中国数学史断代研究的一项新成果：—《明清数学史论文集》简介

本文简介梅荣照主编的《明清数学史论文集》一书，对中国数学史开展断代专题研究，是我国数学史界继承并发展李俨、钱宝琮、严郭杰先生研究成果的宏大计划，持续近三十年，历来为国际科学史界所重视，文集收入论文15篇、附录2篇，其中严敦杰先生遗作7篇，本文对15篇论文逐一作了简介。     

The Challenging Topics and Future Directions of the Research in Limnology and Watershed Sciences

Based on reviewing the problems in limnology and watershed sciences in meeting the national demands and the development of theories and methodology, this paper proposed some challenging topics to the sciences, covering the process of lake evolution and the quantitative analysis of human impacts, in -lake nutrient cycling an biogeo-chemical process, the process and mechanisms of material flow in lake-watershed system, digital watershed and the modeling of the surface process of lake -watershed, and ecosystem health and scientific management of lake-watershed.     

硅、铋离子鉴定方法的探讨

本文对现用叙材中硅、铋离子的鉴定方法进行了改进,改进后的鉴定方法既简单快速,又灵敏可靠.     

The behavior of the homozygous and heterozygous sub-types of rats which are genetically-selected for diabetes insipidus: A comparison with Long Evans and Wistar stocks

Several aspects of spontaneous and conditioned behavior (food and water intake, locomotion and emotionality, passive and active avoidance acquisition and retention) of standard (albino and pigmented) rats, and rats heterozygous (HEDI) and homozygous (HODI) for diabetes insipidus, are reviewed. As would be expected, HODI rats have been repeatedly found to consume far more fluid than either HEDI or control rats. Pigmented rats appear to be more active than albinos. HODI rats exhibit less marked emotional responses than do control rats, among which the pigmented ones exhibit the highest emotionality. Light aversion is more evident in albino than in pigmented rats. No differences are found among HEDI, HODI and normal Long Evans rats. It is quite difficult to provide a clear-cut statement concerning inter-strain differences in passive avoidance behavior, possibly because of the variety of techniques employed. In any case, HODI rats do not perform worse than normal controls do. In one-way active avoidance paradigms, pigmented rats perform better than albinos, and the performance of HODI rats does not differ from that of controls. In two-way avoidance paradigms, albinos appear to outperform pigmented rats. Once again, there are no obvious differences between HODI and control animals.In addition to indicating that HODI rats may actually be less emotional than the other groups of rats reviewed here, the studies described once again fail to confirm the previously alleged functions of vasopressin in memory consolidation.     

现代意义下作战模型的研究

本文阐述了现代战争的特点，构造了现代意义下的作战模型，通过求解与分析，指明信息在现代战争中的重要作用和对未来战争的指导意义。