圆筒结构及圆锥形漏斗分析的有限条法

本文吸取解析法和有限元方法各自的优点,基于最小势能原理,采用有限条方法分析了圆筒体结构及圆锥漏斗。本方法适用于等截面、变截面及复合壁在轴对称荷载下的计算。     

化学刺激引起相邻丽藻细胞的重复兴奋发放

给一丽藻细胞以化学刺激,经过一段延时,发现与之相邻的细胞的膜电位出现了自持重复兴奋发放.这一现象,可能是阳离子通过细胞节的扩散而引起的.     

基于普通数码影像快速绘制等高线方法研究

利用普通数码相机采集立体像对,通过直接线性变换(DLT)方法,对所采集的立体像对进行分析、解求,进而求取立体像对内的地表三维空间坐标,利用求得的地表三维空间坐标组建三角网(TIN),从而在TIN的基础之上绘制等高线。     

连续介质热力学的变分原理及应用

本文系统地提出了连续介质热力学的变分原理和广义变分原理.并在断裂力学中作了初步应用.     

化学偶联反应条件探析

本文对化学偶联反应的发生条件加以详细探析,发现化学偶联反应的发生不仅需满足已知的特定热力学条件,而且也应满足一定的动力学条件.若只有两个基元反应偶联,在弛豫时间里,该动力学条件:JT_1A_1~2—JT_2A_2~2>0,这一结果也说明了文献[3]中的结论存在一定的片面性.     

固体粉末的分形几何体尖端烧结模型

本文提出一个分形几何模型(Fractal geometry model)。用它描述固体粉末体系的结构特征,并在此基础上建立了单金属粉末体系烧结过程的动力学模型。以单分子反应为例,研究了与烧结有关的若干因素。将理论预测与已有实验进行比较,得到了较满意的结果。     

硫酸铁溶液中方铅矿溶解的混合电位振荡现象

通过动态测量混合电位，研究方铅矿电极在不同浓度的硫酸铁溶液中溶解的动力学过程。实验结果表明：在35℃的0．10和0．01mol／L的Fe2（SO4）3溶液中，方铅矿的溶解存在电化学振荡现象，方铅矿电极的混合电位随时间发生有规律的波动；开放体系下由溶解氧驱动的方铅矿表面Fe^3＋浓度的周期变化、方铅矿电极表面单质硫的生成及其进一步氧化溶解、以及已反应方铅矿表面的缺陷层的重新生成和再分解，都将影响每个电极反应的中问步骤，所有这些因素的耦合和反馈，将会导致硫酸铁溶液中方铅矿混合电位的振荡变化。     

具有两个异号非线性源项的波动方程的整体解

讨论了具有两个异号非线性源项的波动方程utt-△u a|u|p-1u-b|u|q-1u=0的初边值问题.依据势井理论,引入了一簇势井,并结合紧致性方法得到该问题整体解的存在性.     

Klein-Weyl's program and the ontology of gauge and quantum systems

We distinguish two orientations in Weyl's analysis of the fundamental role played by the notion of symmetry in physics, namely an orientation inspired by Klein's Erlangen program and a phenomenological-transcendental orientation. By privileging the former to the detriment of the latter, we sketch a group(oid)-theoretical program—that we call the Klein-Weyl program—for the interpretation of both gauge theories and quantum mechanics in a single conceptual framework. This program is based on Weyl's notion of a “structure-endowed entity” equipped with a “group of automorphisms”. First, we analyze what Weyl calls the “problem of relativity” in the frameworks provided by special relativity, general relativity, and Yang-Mills theories. We argue that both general relativity and Yang-Mills theories can be understood in terms of a localization of Klein's Erlangen program: while the latter describes the group-theoretical automorphisms of a single structure (such as homogenous geometries), local gauge symmetries and the corresponding gauge fields (Ehresmann connections) can be naturally understood in terms of the groupoid-theoretical isomorphisms in a family of identical structures. Second, we argue that quantum mechanics can be understood in terms of a linearization of Klein's Erlangen program. This stance leads us to an interpretation of the fact that quantum numbers are “indices characterizing representations of groups” ((Weyl, 1931a), p.xxi) in terms of a correspondence between the ontological categories of identity and determinateness.     

The Another Competitive Advantageous Between Enterprises： Potential Advantageous

The potential advantage has been defined from the angle of management innovation, which is another one of the competitive advantage between companies in incomplete information. The essential characteristics of the potential advantage is analyzed in detail, the three factors have been proposed , such as the excellent boss, competitive information and added value ,which will lead to the cause of the potential advantage .