《易经》学说的现代群论解释

《易经》中涉及到简单的数学原理是众多学者的共识。经过深入的研究还可以发现，《易经》中的阴阳、五行和八卦还有纳入近世代数的可能。经过在八卦和九宫图中定义某些代数运算和正交变换等法则，可以发现，在中国古人的阴阳学说与卦象上建立代数群是可行的。     

浅谈变压器的安装及调试运行

变压器的安装调试运行必须遵循施工顺序和操作方法,达到现行的国家标准和验收规范的规定,方可运行生产.本文主要探讨变压器安装和调试应注意的问题.     

《学书枝言碑》的诸多问题探讨

孙清彦《学书枝言碑》原石已毁湮,传世拓片亦不全。相关史载多有舛误,由于一直看不到全碑全文真相,书刊文章引用时只能沿袭旧说。本文在整理点校全文基础上,就其作者问题,书刻年代,立碑地点,书刻形制,内容字数等等作出考定,期望相关部门在重修史志时,能据实予以更正。     

大学考试时间表问题的混合遗传算法求解

考试时间表问题是一类典型的组合优化问题,也是NP难问题。分析了大学考试时间表编排的特点,给出了一种解决考试时间冲突的自动生成考试时间表的可行时段-查找算法。为进一步解决时间间隔问题,将可行时段-查找算法嵌入到遗传算法中形成混合遗传算法。实验结果表明,本文提出的混合遗传算法能快速、有效的解决大学考试时间表问题。     

Concurrent transmission with minimal SR-pair interference in WiMAX mesh networks

Performance of wireless mesh networks can be greatly improved by spatial reuse (SR), therefore, lots of algorithms have been proposed to maximize the number of concurrent transmissions. However, most methods only considered the interference brought by the sender nodes. In this paper, we study the interference model in WiMAX mesh networks and propose a minimal SR-pair interference model to perform concurrent transmissions in both uplink and downlink directions. Simulation results show that our model is more efficient and stable, i.e., it increases the number of concurrent transmissions and its performance is constant and independent of transmission directions. Biography: XIONG Qing(1978–), male, Ph. D., research direction: wireless mesh networks.     

Features of intervertebral disc degeneration in rat’s aging process

Objective: The age-related change is important part of degenerative disc disease. However, no appropriate animal model or objective evaluation index is available. This study aimed to investigate the features of intervertebral disc degeneration in aging process of rats. Methods: 22-month-old Sprague-Dawley (SD) rats were used as spontaneously occurring intervertebral disc degeneration models and 6-month-old rats as young controls. Expression of collagen types II and X was measured by immunohistochemistry. Degenerations of intervertebral discs were scored according to Miyamoto’s method. Numbers and areas of afferent vascular buds were measured. The thicknesses of non-calcified and calcified layers were measured and statistically analyzed. Results: There were less collagen type II expression and more collagen type X expression in the calcified layer of the cartilage endplates and nucleus pulposus in the rats of the aged group than in the young control. There were fewer and smaller afferent vascular buds in the rats of the aged group than in the young control group. The ratio of the non-calcified to the calcified layers in the rats of the aged group significantly decreased, compared with that of the young control group (P<0.01). Conclusion: Rats can spontaneously establish intervertebral disc age-related degeneration. The expression of collagen types II and X, numbers and areas of afferent vascular buds, the ratio of the non-calcified to the calcified layers, and water and glycosaminoglycan contents in the nucleus pulposus are sensitive indexes of intervertebral disc degeneration.     

观音岩水电站混合坝插入式接头的抗震性能

观音岩水电站混合坝插入式接头高度达71,m,是大坝结构的薄弱环节,接头的动静安全直接关系到工程全局.以薄层单元模拟插入式接头中堆石坝心墙与混凝土的接触面,堆石和心墙料采用Hardin非线性动力本构模型,在三维非线性静力分析基础上,基于时程法对大坝连接坝段进行了地震动力分析,揭示了在地震过程中接头部位接触面的开合变形性态、剪切破坏及地震永久变形情况.三维非线性仿真分析的结果表明:在设防烈度地震作用下,土质防渗体与混凝土坝接触面仅在靠近顶部和两侧部位发生一定张开,张开度较小,张开持续时间短,接触面并未形成贯通的张开面;接触面剪切破坏范围较小,顶部具有一定程度的永久变形.综合来看,插入式接头的抗震安全性是有保障的.     

简论抗战时期翻译戏剧的战斗精神——以朱生豪《哈姆莱特》译本为例

莎士比亚的著名悲剧《哈姆莱特》诞生于17世纪初的英国，翻译家朱生豪在抗日战争期间将《哈姆莱特》译人中国。从该剧本诞生的社会语境、译人中国的时代语境和译者个人的翻译目的乃至译本的思想内容等方面综合来看，《哈姆莱特》译本在中国抗战的大环境下被赋予了丰富的战斗精神。     

乘法算子的Herz型Sobolev范数估计

文章给出了乘法算子的Herz型Sobolev范数的估计。证明中使用了已有的Herz型空间的一些性质和对偶空间的性质。证明是在等价范数的意义下进行的，通过对乘法算子进行分解，研究了乘法算子的Herz型Sobolev范数的一种估计。     

抗茵药物使用情况1846例临床分析

目的调查医院临床抗菌药使用情况,针对发现的问题提出合理的解决方案,以提高临床合理用药水平.方法抽取吉林省前卫医院有住院部的18个临床科室2012年3～5月每月1,5,9,13,17,21,25,29日共8 d的出院病历共1846份,对所有病历的抗菌药物使用情况进行统计分析.结果经统计分析,医院有63.4%的住院患者使用过抗菌药,使用的抗菌药物种类共42种,在使用抗菌药的患者中有84.7%的患者使用过2种及以上抗菌药物,其中联合用药达6种以上的患者74名,在使用抗菌药的患者中有56.2%的患者进行了药敏实验,但无一例患者进行血药浓度监测.在所有18个临床科室中,手术科室抗菌药的使用率和联合用药率明显高于非手术科室.结论虽然经过努力,抗菌药物的使用率已接近国家要求,但在使用抗菌药物的患者中缺少必要的药敏实验,存在凭经验开方的现象,在高危抗菌药物联合应用中缺乏血药浓度监测.针对以上问题,应从医院和患者两方面入手方能得到较好的解决.