浅析确保高危客户安全用电的措施

分析了煤矿高危客户安全用电方面存在的问题,并提出了相应的解决办法。     

关于Theta函数平方的恒等式

文章通过运用经典椭圆函数极点理论，得到一些雅可比Theta函数等式．再应用这些等式得到一些有关Theta函数平方恒等式，一些著名的Theat函数平方关系的恒等式成为了他们的特殊情形．     

中国梦释义及其实现路径选择

每个人都有自己的梦,每个民族也都有自己的梦想.中国梦是实现国家富强、民族振兴和人民幸福的真切追求,是凝聚13.4亿中华儿女的共同理想.实现中国梦,必须在中国共产党的领导下走中国特色社会主义道路,不断增强对中国特色社会主义的理论自信、制度自信和道路自信.     

Testing for the usefulness of forecasts

Ashley (Journal of Forecasting 1983; 2 (3): 211–223) proposes a criterion (known as Ashley's index) to judge whether the external macroeconomic variables are well forecast to serve as explanatory variables in forecasting models, which is crucial for policy makers. In this article, we try to extend Ashley's work by providing three testing procedures, including a ratio‐based test, a difference‐based test, and the Bayesian approach. The Bayesian approach has the advantage of allowing the flexibility of adapting all possible information content within a decision‐making environment such as the change of variable's definition due to the evolving system of national accounts. We demonstrate the proposed methods by applying six macroeconomic forecasts in the Survey of Professional Forecasters. Researchers or practitioners can thus formally test whether the external information is helpful. Copyright © 2010 John Wiley & Sons, Ltd.     

模型势MCP应用于分子间相互作用的研究

使用模型势MCP计算了含重元素的氢键和vail der Waals相互作用体系的几何结构与结合能。结果表明，在MP2水平，应用MCP基组研究分子间相互作用时，可以使用Boys和Bernardi提出的均衡校正法进行基函数重叠误差（BSSE）校正；与同一水平的全电子基组相比，经BSSE校正后的结合能AEcP平均相对误差为5．2％，结果准确，但是BSSE普遍较大；使用MCP基组的计算时间远小于全电子基组，MCP方法的效率随原子的电子层数增加而提高。     

四个幂等矩阵线性组合的幂等性

给出了当P1,P2,P3,P4 是四个不同的非零的两两可交换的n×n 幂等矩阵并且c1, c2, c3,c4 是非零复数时, 线性组合c1P1+c2P2+c3P3+c4P4在两两乘积等于零与两两乘积等于其中一个的条件下仍是幂等矩阵的一些充要条件.     

二次型在超曲面上条件极值的矩阵解法

利用矩阵理论得到了二次型在一般的二次超曲面上取得条件极值的充分条件，并结合实例用Matlab编程实现了求解过程．     

Automatic identification of use cases from codes: A user’s goal driven approach

Based on the different roles played by base flow and alternative flow in the process to achieve user’s goals, we have found that loop structure is frequently used to implement alternative flow and/or to connect different use cases. This paper presents an approach to identify base flows and alternative flows of different use cases by traversing control flow graph in which back edges are eliminated. The effectiveness of the approach is verified by identification of the use case structure of an ATM system. The workload of human intervention of the approach is relatively slight, and the manner of human intervention closely follows the usual process of software comprehension.     

幼儿创造性养成:反思和重构

当今社会需要创造性的人才,而人才的培养要从幼儿期开始,本文从培养幼儿创造性的意义,当前存在的问题以及对策方面进行了初步的阐述.     

某轿车的铰接点——A点优化设计

对某轿车的铰接点(A点)进行了刚度及其灵敏度分析,并在此基础上对A点进行了优化,对比分析优化后的A点发现,重量减轻了,刚度并没有减弱.说明这种以减重为目标的优化分析方法是有效可行的.