基于体积分方程法的起伏地形三维电场正演

利用体积分方程实现了起伏地形三维电场的正演模拟。首先推导了起伏地形条件下的积分方程,在求解电并矢格林函数积分这一关键问题时,将其分解为一次电流项、一次电荷项和二次项;随后进行了模型试算,结果表明电场在地形和地下不均匀体处均有异常出现。     

解析函数、共轭解析函数及复调和函数的一个充要条件

给出了复形式的解析函数、共轭解析函数及复调和函数充要条件的证明及其重要应用。     

基于自组织数据挖掘的电子商务客户流失预测模型

为解决电子商务客户流失预测中的高维、非线性问题,本文将自组织数据挖掘理论(SODM)引入客户流失预测,提出一种新颖的基于自组织数据挖掘的电子商务客户流失预测模型。该方法将自组织数据挖掘中的客观系统分析算法(OSA)和改进分组数据处理网络(GMDH)集成起来进行电子商务客户流失预测。首先利用OSA算法选择出重要的电子商务客户流失关键属性,然后将训练样本送入改进GMDH网络进行学习和训练,进而对测试样本客户流失状态进行判别。将该方法应用于某网上商店客户流失预测实证分析,预测结果验证了该方法对包含多种因素影响的电子商务客户流失预测具有优势,基于自组织数据挖掘的电子商务客户流失预测模型具有较强的实用性和可操作性。     

浅谈如何做好基层建设工作

始终坚持把基层党务工作的重点,放在以科研生产为核心的职工队伍建设上。为此,党组织要管好党员,发挥党组织的先锋模范作用,要宣传好群众,发挥好职工群众的积极性,调动所有人的工作热情,围绕石油企业的生产目标展开工作。     

The competition and equilibrium analysis of LCD TV and PDP TV

This study has investigated the dynamic competitive relationship between PDP TVs and LCD TVs by means of their quarterly shipments. The renowned Lotka-Volterra competition diffusion model has been adopted to conduct the empirical analysis with the Lyapunov function to carry out equilibrium and stability analysis, and estimate the domain of attraction which describes the trend and phenomenon of TV shipments. The results illustrate that there is good fitting performance while adopting this model. The competitive relationship can be viewed from the perspective that the LCD TV is the prey while the PDP TV is the predator. The possibility, nevertheless, for dropping the price of LCD TVs is an advantage of the attractiveness of the product which can be noted in higher growth rate than PDP TVs. With respect to the equilibrium stability analysis and estimated domain of attraction, 40- to 49-inch PDP TVs will not disappear from the market, but will generate a stable equilibrium with LCD TVs and sales volume presents simultaneous increase or decrease. In the supply and demand analysis, LCD TVs present a surplus of supply from 2008; therefore, how to conduct appropriate inventory management will be an emerging issue.     

纠正市场失灵的对策分析

改革开放以来,随着市场经济的发展,我国出现了市场失灵的现象。真正做到有效地弥补市场失灵,还要靠政府通过发挥经济职能来做到。针对市场失灵表现的五个方面:垄断性失灵,外部效应,公共产品的提供,失业、通货膨胀和经济失衡以及收入分配问题,政府应该提高效率,有效治理失业、通胀和经济失衡,增进公平的职能调节收入分配,主要是运用收入再分配来弥补市场失灵。     

Effects of mentoring functions on receivers' organizational citizenship behavior in a Chinese context: A two-study investigation

This research examines the relationship between mentoring functions received by employees and their organizational citizenship behavior (OCB), and the moderating effects of perceived quality relationships with mentoring function providers in China. Results of Study 1 from a sample of 385 supervisor-subordinate dyads reveal that role modeling received by protégés positively relates to their OCB, and perceived mentoring relationship quality moderates the association between career support received and protégés' OCB. Moreover, nonprotégés and protégés who receive high levels of overall mentoring functions perform more OCB than protégés who receive low levels of mentoring functions. Results of Study 2 from 258 supervisor-subordinate dyads show that role modeling received by subordinates positively relates to their OCB directed at individuals (OCBI) and at the organization (OCBO) while career support received positively relates to OCBO. Additionally, leader-member exchange moderates the linkages of role modeling with OCBI and OCBO.     

我国政府转型与经济增长的实证分析

以1978—2008年的统计数据为依据,从我国财政支出及其结构的角度出发,描述我国改革开放以来政府职能的转变。对许多学者所认为的投资对经济增长的拉动作用会逐渐减弱以及城乡收入差距拉大的解决方案是增加财政中的支农支出进行实证分析,得出与一般理论相违背的结论,在此基础上提出我国政府职能转变应从转变经济增长方式,实现社会公平、公正方面入手。     

高职院校教学系部目标管理绩效考核初探

从当前高职院校教学系部发展的自身规律出发,将目标管理引入系部绩效考核工作,不仅有利于提高系部的教学质量和管理效率,还有利于推动高职院校整体办学实力和竞争力的不断提升。