经济管理中模糊数学的应用研究

本文利用现有统计年鉴数据,提出对中国人均经济状况统计量中的部分变量按隶属系数统一标准划分等级,结合模糊数学的基本原理进行产品需求量推理预测的新思路,简化模糊蕴涵关系的计算量,得出中国各省对某种产品需求量预测值的上、下限;根据现代控制理论,针对该需求预测范围,利用经典生产－库存系统,通过设计一个系统的纯增益反馈控制器,实现由市场需求信息到对生产－库存系统的控制,展示一则优化管理的实例。     

商洛冶炼厂废渣回收与处理(Ⅲ)——由铜渣制备氮肥厂铜洗液

利用 H2 SO4-Fe-(NH4) 2 CO3-NH3· H2 O体系由铜渣制备醋酸二氨合亚铜溶液 .实验表明 ,所制溶液完全合乎合成氨洗气要求 .     

大学生畏惧中长跑的原因和消除方法

在体育教学和达标测验中发现 ,大多数学生在体育达标 80 0 m、 10 0 0 m跑中存在着恐惧、厌烦心理 ,女生尤为严重 ,直接影响了其身体素质的全面发展。只有让学生在思想上树立吃苦耐劳的精神 ,明确学习目的 ,了解中长跑锻炼的重要性和必要性 ,才能消除这种畏惧心理 ,取得优异成绩     

运动员临场应激应付方式量表的介绍与检验

对运动员临场应激应付方式量表在国内的使用情况进行了初步检验 ,并对检验结果进行了简要的分析。结果表明 ,运动员临场应激应付量表具有一定的信、效度 ,但尚需进一步修订与完善     

学分制研究与探讨

回顾了学分制的产生及其在我国的实行情况 ,阐述了学分制的概念及其含义 ,探讨、比较了学分制与学年制的各自特点 ,论述了实行学分制的必要性和重要意义 ,提出了我院实行学分制的几点建议与设想。     

The 2006 Benjamin Franklin Medal in Chemistry presented to Samuel J. Danishefsky, Ph.D.

Organic synthesis of natural products began in 1828 with Wohler's synthesis of urea, the first time a substance derived from a living organism had been produced by combining inorganic materials. Progress in the field was slow at first, due to the limited purification and analytical methods. Advances in those areas gave rise to rapid progress in synthesis, as chemists could now focus their energies on devising new approaches to the preparation of increasingly complex molecules. While it is possible to prepare many molecules by using known chemistry in new combinations, real progress has been the result of keen insight and creativity on the part of only a few individuals.Professor Samuel J. Danishefsky established himself early on as a leader in this field when he recognized that a well-known ring forming reaction could be greatly extended by adding chemical functionality to one of the components. He then found that these new reactive components could react with heretofore unreactive components to produce new rings containing oxygen atoms both in the ring and as attachments to the ring. These products were very similar to naturally occurring sugars. Danishefsky realized that he could develop this chemistry further to produce precisely defined polysaccharides as well. Some of these polysaccharides occur on the surface of cancer cells. Using the chemistry he developed, he was able to prepare these cancer cell markers, and after combining them with certain proteins, showed that the resulting molecules behaved as cancer vaccines. Several have entered clinical trial.Danishefsky has synthesized many other natural products, but he is particularly interested in those that may be useful in treating cancer. His syntheses allow for the modification of the final product in ways that improve both safety and efficacy. Several of these compounds have also entered clinical trials. Thus his work has not only advanced the art and science of organic synthesis, but stands to make dramatic advances in the treatment of cancer as well.     

Child studies, religion, and science: the life and work of head teacher Jens Olsen

Jens Olsen (1840–1911), head principal of the Danish town of Varde was in many ways typical for his time. He was an engaging teacher and school reformer. But he was also a Christian, a believer in the ideas of the Danish priest, N. F. S. Grundtvig. Last but not least, he was curious. His curiosity and interest in the nature of children brought him in contact with the Anglo-American movement of child study. This chapter tells the story of how child studies became his way of trying to bridge the gap between the Darwinian approach to the history of humanity and a Christian view.     

篮球专修学生临场执裁能力的培养

针对目前篮球专修学生中存在的临场执裁能力较差的现状,分析了问题产生的原因,并提出了改革理论教学方法、注重理论结合实践、充分采用信息反馈手段等若干措施.