硅甲基亚胺与水亲核加成反应机理的理论研究

采用量子化学从头算和密度泛函方法在HF/6-31G**及B3LYP/6-31G**水平上对硅甲基亚胺与水间的亲核加成反应机理进行了理论研究.利用能量梯度法对反应途径上各驻点的几何构型进行了优化,对过渡态进行了振动分析确认.结果表明:该反应为一由两步基元过程所构成的复杂反应,两反应物首先经过一无势垒过程形成中间体复合物,该复合物经过四元环过渡态形成产物,第二步过程的活化势垒为1.67kJ·mol-1(B3LYP/6-31G**).总反应为强放热过程.     

学校中构建"篮球后备人才资源库"的探讨

近几年来，中国篮球因为受“奥运战略”和“全运金牌战略”的影响，忽略了篮球后备力量的培养，出现了严重的断层现象，直接导致了中国篮球水平的严重滑坡．在这种情况下打破传统的人才培养模式，建立一套适合我国国情且行之有效的篮球后备人才培养体系就成为当务之急．学校是篮球力量培养的一块宝地，对中国篮球事业的兴衰起着至关重要的作用，因此，在学校中构建“篮球后备人才资源库”势在必行．     

球对称动态黑洞的广义Stefan-Boltzmann定律

选取超前爱丁顿坐标，采用统计的方法，计算出动态黑洞的瞬时辐出度．结果表明，动态黑洞的瞬时辐出度不仅与假定黑洞处于热力学平衡时的辐出度有关，还与黑洞的事件视界速度、事件视界温度、事件视界附近的熵密度及黑洞的吸收和辐射系数有关．对于球对称动态黑洞，任一时刻黑洞的瞬时辐出度总是正比于黑洞事件视界温度的四次方．     

动态黑洞视界面附近的熵密度

利用带有电荷与磁荷的直线加速动态黑洞的熵密度，得到了任一时刻黑洞视界面附近沿某一方位角的熵密度总是正比于该处视界温度的三次方的结论．发现直线加速动态黑洞视界面附近的熵密度不仅与时间有关，而且与方位角有关．     

Atomic phase diagram

Based on the Thomas-Fermi-Dirac-Cheng model, atomic phase diagram or electron density versus atomic radius diagram describing the interaction properties of atoms of different kinds in equilibrium state is developed. Atomic phase diagram is established based on the two-atoms model. Besides atomic radius, electron density and continuity condition for electron density on interfaces between atoms, the lever law of atomic phase diagram involving other physical parameters is taken into account, such as the binding energy, for the sake of simplicity.     

The density curve of F distribution

Employing the properties of special function,we discuss the positional relation between two density curves with different parameters for F distribution in this paper.Some varying regularities about the position of density curve of F distribution have been obtained.     

Comparison of metallogenesis and resource potential on the eastern margin of the Jiangnan Upheaval between south Anhui (Wannan) and northeast Jiangxi (Gandongbei) provinces

The southern and northern parts of the eastern margin of the Jiangnan Upheaval, located in the northeast of Jiangxi Province (Gandongbei) and the south of Anhui Province (Wannan) share many similar characteristics of basement composition and structural evolution. However, the two areas have very different metal endowments and ranges of deposit types. The aim of this paper is to compare the metallogenic conditions of the two areas in order to analyze the reasons for these differences and to estimate the preliminary resource potential of the studied areas. It is concluded that difference of the crust-mantle interactions, especially the Yanshanian magmatism in the two areas, is the main reason resulting in difference in the ore-forming processes between Wannan and Gandongbei. The resource potential of Gandongbei is significantly greater than that of Wannan.     

Detection of the translational oscillations of the Earth''''s solid inner core based on the international superconducting gravimeter observations

Before about 100 years, the layered structures of the Earths body and the existence of the liquid core had been found, then the solid inner core and detailed structures in the interior of the Earth are demonstrated, it proves that the satisfied achievements had been obtained in recogni-tion of the Earths interior structures. In recent years, with the increasing requirements of the basic sciences and space techniques to geodynamics of the Earths interior, the theoretical study and practical de…     

关于企业培训职能外包的可行性分析

在当代 ,随着科学技术的发展与企业管理的创新 ,在国内外迅速形成了关于人力资源管理 (HRM)职能外包的理论研究与具体实施的热潮。其中 ,企业培训作为HRM的重要职能之一 ,具有为企业保持和提升竞争优势而创造源泉的巨大潜力 ,本文首先分析了外包的含义 ,接着分析了HRM职能外包的可能性及企业培训职能外包的可行性 ,最后提出了企业培训职能外包的具体建议     

基于综合赋权的风险型多属性决策方法

讨论了属性值是有限区间上的连续型随机变量的风险型多属性决策问题。首先,通过密度函数的变换,研究了风险决策矩阵的规范化问题。基于主客观赋权的思想,建立了一个确定综合权重的模型,并给出了求解此类问题的一种方法。最后,以属性值为区间数的多属性决策问题作为特殊情况,给出了实例。