经营国际化是乡镇企业的发展趋势

随着科学技术的进步和社会生产力的发展,推动世界经济由物质产品经济向服务经济过渡。产业之间的技术和经济联系呈国际化趋势,其集中表现就是跨国公司的发展和国际贸易的扩大。随着全球经济的发展》镇企业发展外向型经济,进入世界经济大循环,走经营国际化之路已是必然趋势。一、乡镇企业经营国际化的意义乡镇企业经营国际化对发展我国经济有重大意义。第一,乡镇企业发展外向型经济,可以充分利用世界产业结构调整机遇,参与国际分工与合作,推动我国产业结构调整优化。当前,世界产业结构正处在新一轮调整时期,发达国家纷纷向外转移劳…     

Tuition Fees for Higher Education and Intergenerational Mobility in China

This paper studies the impact of an increase in higher education tuition on intergenerational mobility in China. We develop a theoretical model for the parental decision about the investment on education of children to illustrate the impact from the perspective of borrowing constraint. We consider the Chinese college tuition and subsidy reform around 1986 as a quasi-natural experiment for identifying the policy effect of the reform on intergenerational educational mobility by using the data from the census of 2000 and the China Family Panel Studies (CFPS). We find that an increase in the education burden induced by the reform of college tuition has reduced intergenerational educational mobility, and it is more noticeable in regions with a relatively higher increment in the tuition fee. Our results are robust with consideration of the co-residence bias, government investment in elementary education, and the higher education expansion.     

新疆新源县农村饮水安全工程水源方案研究

为更好的解决农村饮水安全水源选择问题,本文针对新疆新源县水资源情况进行分析和研究,确定了适合当地的水源布置方案,即采用地表水水源净化工艺,可更好的改善和提高项目区居民饮水状况。本文的研究思路可为全疆农村饮水安全工程水源方案的选择提供参考和借鉴。     

北大港水库水-土界面盐分释放规律研究

为了研究天津北大港水库水质咸化机理,采用野外取样与室内土柱试验相结合的方法,研究了北大港水库蓄水时底质与上覆水体之间盐分的释放规律。结果表明:底质向上覆水体释放盐分时水体中存在一个明显的盐分渐变区(扩散边界层),该层位于水-土界面以上10cm的范围,底质中释放出的盐分有60%集中在边界层,边界层以上水体盐分垂直变化较小;底质中盐分的累积释放量随时间的变化符合对数函数形式,试验运行前50天中盐分累积释放量占底质盐分总释放量的80%左右;水-土界面处盐分释放通量的变化趋势存在周期性,每个周期内均呈现先迅速增加后缓慢下降。     

MODELING ON THE CYCLIC OPERATION OF STANDING COLUMN WELLS UNDER REGIONAL GROUNDWATER FLOW

Coupled hydrogeological-thermal simulation of the Standing Column Well(SCW) system is essential to provide an optimized configuration and operation schedule for boreholes on the site.This paper presents numerical investigations and thermo-hydraulic evaluation of standing column well system operating under cyclic flow regime.A three-dimensional numerical model for groundwater flow and heat transport is used to analyze the heat exchange in the ground.The model includes the effects of convective and conductive...     

响水风电场风机基础的设计和施工

介绍响水风电场风机基础工程概况及地质条件,针对响水风电场工程地处滩涂地区,地基土层较弱,持力层位置相对较深的特点,详细阐述了响水风电场风机基础设计和施工的情况。     

多能力结构的应用电子技术人才的培养

应用电子技术人才在我国社会的发展中已经显得越发重要,各高校也加紧了培养应用电子技术人才的步伐。面对现代社会对这一人才的大量缺乏,教育系统在数量上给予满足的同时,也应该保证质量的过关。现代社会要求具有多种能力结构的应用电子技术人才,本文针对这一现象进行重点论述,寻求培养多能力结构的应用电子技术人才的有效措施。     

提升领导干部科学素质方法探讨

提高领导干部科学素质,对于构建社会主义和谐社会,提高党的执政能力,推进社会稳健持续发展具有重大而深远的意义。