弱梁法优化多层框架结构侧向刚度

为满足建筑抗震设计规范对混凝土框架结构侧向刚度规则性的要求,分析了柱侧向刚度修正系数与梁线刚度的关系.以5榀4层单跨平面框架为研究对象,比较了各层的侧向刚度.验证了通过小幅度弱化底层梁,稍大幅度弱化底层以上其余3层梁,可将底层侧向刚度提高至不小于其上层侧向刚度70%以及不小于其相邻上3层侧向刚度平均值的80%的事实,该思路可供结构工程设计人员参考.     

Sawada-Kotera-Ramani方程的两类尖孤立波解

用(G′/G)展开法构造出Sawada-Kotera-Ramani(SKR)方程的两类尖孤波解.这两类孤波解都有尖峰或倒尖峰,且满足Rankine-Hugoniot条件和熵条件,是方程的弱解.     

云南澄江上震旦统白云岩的成因探讨

云南澄江上震旦统白云岩,其白云石有序度与沉积和成岩环境有关。浅滩相的颗粒白云岩,其白云石有序度为0.857,MgCO_3=50.574%Sr/Ba=0.206,小于1,为混合水白云石化模式产物;潮坪-泻湖的藻白云岩,白云石有序度也高,为0.922-1,MgCO_3=50.230-50.912%,Sr/Ba=0.277-0.313,小于1,也是有淡水参加作用的库龙白云石化模式产物;只有萨布哈的膏质白云岩,白云石有序度低,为0.588,Sr/Ba=2.475,大于1,CaCO_3≈MgCO_3(无序排列),系蒸发泵白云石化模式产物,震旦系白云石也有无序的。     

C(R)中非线性逼近的Papini特征

考虑了C(R)中的非线性逼近问题,给出了 C(R)中最佳逼近和唯一最佳逼近的 Papini 特征定理。     

大统一前子模型与N_y实验结果对比分析

本文讨论了最近西欧中心的LEP关于轻中微子个数N_7的实验结果对大统一前子模型的限制.由于LEP的精确实验结果给出N_y=3,可能的大统一前子模型为禁闭弱作用大统一前子模型.我们也讨论了若允许重中微子代存在时,LEP实验结果对大统一前子模型的限制.     

真空泡沫中Lorentz虫洞的能动张量

对最近发现的真空泡沫中的Ｌｏｒｅｎｔｚ虫洞的能动张量进行了计算，计算结果正如理论所预料的，在这种微观Ｌｏｒｅｎｔｚ虫洞内要出现具有负质量的异常物质，这种异常物质可能具有反重力。     

概率算子的性质及其应用

本文给出了概率算子进一步的性质,并对其在弱收敛及其他方面的应用,得出一些结果。     

关于模的几种特殊扩张

本文以函子Ext、Tor为工具,首先讨论模的几种特殊扩张的性质,然后,进一步探讨有关“同调维数”问题,得出了一系列结果.     

多级平板运动试验诊断冠心病在高原地区的应用

本文报道了使用国产YC·P-Ⅰ型活动平板运动测试机对川藏高原45例可疑冠心病患者进行了多级活动平板亚极量运动试验的结果,表明本试验在高原地区应用是安全可行的。     

Luminescence research and its relation to ultraweak cell radiation

Summary The fundamental laws of photochemistry and the essential results of experimental research on ultraweak cell radiation are presented. By comparing all the facts it can be concluded that the phenomena discussed may arise from a variety of possible reactions and sources. Recombination reactions of certain radicals actually do release sufficient energy to generate UV-photons of the intensity under consideration. On the other hand, stimulated emission cannot be excluded in view of the distinct deviation of the radiation field from thermal equilibrium. There exist, however, various other candidates, such as direct emitters like flavins, indoles, porphyrins, carbonyl derivatives and aromatic compounds, and molecular oxygen and its various species, as well as collective molecular interactions, e.g. dimole or exciplex transitions, triplet-triplet annihilation, collective hydrolysis, electric field effects in membranes, etc.Careful biochemical and biophysical experiments are still necessary to find answers to all the questions that remain; not only individual problems have to be solved, but it is important to keep in mind the interrelationships between certain reactions.