复合材料风机叶轮动静态特性有限元分析

运用有限元软件Ansys，对设计开发的轴流式FT35-11的一个纤维增强复合材料风机叶轮的动态特性、工作时在离心力作用下的应力和变形进行了分析，设计的叶轮能满足强度和刚度要求，为纤维增强复合材料风机叶轮的生产应用奠定了理论基础。     

建议用"能源"和"能量资源"替代"能源资源"

能源(energy)即能量(power)之来源.能量可以直接来自自然界,也可以来自人工加工的产物.人们在谈论能源时,所指的就是能量资源(power resources),所以,能源是能量资源的简称,能量资源是能源的全称.     

提高现代远程教育质量的策略

目前，以计算机网络为基础的现代远程教育在我国得到了长足的发展．但是作为一个新生事物，在具体应用中还存在一些问题．比较突出的就是学习支持服务问题，由此引发了高辍学率、低及格率、毕业时间延长等问题．基于我国远程教育的发展现状，以提高远程教学质量为出发点，提出增强学习支持服务意识、使用统一制作的课件形式、实行“教师-课程-学生”绑定制度以及提供更多共享资源等提高远程教育质量的实施策略．     

用颗粒流模拟技术模拟固化时间对胶结膏体细观参数的影响

Several special mechanical properties, such as dilatancy and compressibility, of cemented paste backfill (CPB) are controlled by its internal microstructure and evolution. The mesoscopic structure changes of CPB during the development process were investigated. On the basis of the scanning electron microscopy (SEM) and mechanical test results of CPB, the particle size information of CPB was extracted, and a two-dimensional particle flow code (PFC) model of CPB was established to analyze the evolution rule of mesoscopic parameters during CPB development. The embedded FISH language in PFC was used to develop a program for establishing a PFC model on the basis of the SEM results. The mesoscopic parameters of CPB samples at different curing times, such as coordination number (C_n), contact force chain, and rose diagram, were obtained by recording and loading and used to analyze the intrinsic relationship between mesoscopic parameter variations and macroscopic mechanical response during CPB development. It is of considerable significance to establish the physical model of CPB using the PFC to reveal the mesoscopic structure of CPB.     

丙硫咪唑对幼儿蛲虫感染的防治效果观察

本文采用透明胶纸法于1989、1990年两次对海口市机关幼儿园进行蛲虫检查,并用丙硫咪唑治疗。1989年蛲虫感染的检出率为63.69％,服丙硫咪唑一年后1990年同期的检出率为54.71％,感染率较上年下降(P<0.01),1990年服用丙硫咪唑两周后复查,虫卵阴转率为88.31％。通过对该药治疗蛲虫病近、远期效果的观察比较,并探讨了如何有效地进行蛲虫病防治的问题。     

Some factors modifying the action of chlorpromazine upon the O2 uptake of brain homogenatesin vitro

Zusammenfassung Largactil vermindert auch in niedrigen Konzentrationen (10⁻⁶ g/ml der Krebs-Ringer-L?sung mit 0,2% Glukose) den Sauerstoffverbrauch von Gehirnhomogenaten weisser Ratten signifikant. Diese depressive Wirkung von Largactil tritt nicht ein, wenn die Krebs-Ringer-L?sung ohne Glukose oder ein kalziumfreies Medium zu den manometrischen Messungen gebraucht werden. Weiterhin hat Largactil eine antagonistische Wirkung gegen 2,4-Dinitrophenol in bezug auf die O₂-Aufnahme von Gehirngewebe.      

解二维第一类积分方程的正则化方法

采用修改的Tikhonov正则化方法，提出了一种新的求二维第一类积分方程数值解的计算方法，并证明了解的存在唯一性，给出了算例，说明了算法的有效性．     

Mammalian spot test with moxnidazole,a 5-nitroimidazole

Summary Moxnidazole [3-(5-nitro-1-methyl-2-imidazolyl)-methyleneamino-5-morpholinomethyl-2-oxazolidinone, HCl], known to be mutagenic in microbial tests andDrosophila, induced genetic alterations in somatic cells of mice. Ethyl methanesulfonate (EMS) served as positive control.Acknowledgment. The author is grateful to Dr R. Fahrig for supplying the T-stock and performing the histological examination.