中原城市群城市化水平与创新能力协调发展研究

经济全球化和区域经济一体化背景下,区域竞争与技术创新日益聚焦于大中城市,创新是城市的灵魂,并引导城市的发展;同时,城市作为创新的"神经中枢",只有区域城市化水平达到一定的层次,相应的创新才会产生.二者的关系在于城市通过物质和能量的输入对创新起塑造作用,而创新则通过物质与能量的输出,对城市具有反作用.城市与创新的相互作用,具体表现为以时空为参照系、城市化水平与创新能力相互作用的界面特征.基于上述理论,运用相关分析、熵权分析和层次分析等方法,对中原城市群9个省辖市的城市化水平和创新能力状况作了综合评价,并在综合和分组两个层面对二者协调关系进行了定量分析.     

基于信息熵的三种灰色关联度在房地产住宅消费决策中的优化与比较

介绍了房地产住宅消费决策优化与比较问题的理念,阐述了灰色关联决策的基本原理和三种灰色关联度的决策方法,基于信息熵的基本原理确定了各个目标因素的权系数,建立了相应的决策模型,针对示例方案进行了分析,并作了系统的总结。     

多元化经营关联度研究

文章阐述了多元化经营关联度的内涵,并对国内多元化经营进行实证分析。提出了以关联度为依据,积极推进我国企业多元化经营应该注意的问题。     

长庆油田井下作业用户满意度评价的发展研究与应用

对长庆油田采油二处井下作业系统开展用户满意度调查的历史状况进行了剖析总结,在引进评价模型的基础上,提出了适用于长庆采油二处井下作业系统的用户满意度测评体系,并进行了具体运用.     

集值函数及向量值函数的两类线性算子逼近

本文得到了利用插值型线性算子列及积分型算子列逼近连续集值函数及连续向量值函数的收敛逼近阶。     

关于复数运算在高次方程中的运用

随着office2010版开发,复数函数的运算的完善为高次方程的完整解提供了技术上的有力保障。     

基于信息系统体系下的军人健康度评估问题研究

基于信息系统体系下的现代战争要求作战人员既要有强健的体魄,还要有良好的心理素质。只有身心健康,才能培养健全的人格,强化心智活动,矫正不良心理,因此,提高信息化条件下军人身心健康水平,是军队信息化建设的一项重要任务,也是考察军队政治工作质量的重要指标。     

40CrNi_2Si_2MoVA钢棒材晶粒度控制

随着科技的进步与发展,以改变合金成分提高超高强度钢的强度和韧性已经很困难。本文以40Cr Ni2Si2Mo VA钢为例,探讨了通过控制晶粒度尺寸提高钢强度和韧性的方法。     

Changes in risk and strategic interaction

In this paper we study the comparative statics of Nth degree stochastic dominance shifts in a large class of non-cooperative games. We consider symmetric equilibria as well as asymmetric equilibria in which the risk changes are idiosyncratic and not necessarily of the same stochastic order. Furthermore, we establish conditions for risk changes to produce multiplier effects on equilibrium strategies. Finally, we evaluate the comparative statics of stochastic dominance shifts in supermodular games, which may feature multiple equilibria and non-convex strategy sets.     

Early labor market outcomes of university graduates: Does time to degree matter?

Using university administrative and survey data drawn from the AlmaLaurea Consortium, we analyze the effect of time to degree on the early labor market performance of Italian graduates. The empirical strategy allows identifying separately the impact of elapsed time to degree on the transition from university to work and on earnings from other determinants specific to the academic path completed. Findings suggest that delayed graduation reduces the employment probability (0.8% points for each year of delay), and this effect is still persistent five years after graduation. Once employed, graduates not completing their degree within the minimum period are also penalized in their net monthly earnings, even five years after graduation. The most penalized groups are women and graduates in non-scientific fields.