标准孔板流量计测量天然气流量计量附加误差分析

对标准孔板流量计安装、使用过程中因没有严格按标准进行安装施工所引起的计量附加误差进行分析,找出产生误差的根源,并结合实际工作条件,提出减少误差的措施,以提高标准孔板流量计的计量稳定性和准确性。     

河北省民营科技企业核心竞争力的问题与对策

改革开放以来,河北省民营科技企业得到快速的发展,但民营科技企业核心竞争力还不很强,企业文化的功能没有得到充分发挥,创新能力偏弱、整合能力不强,为此要大力培养科技人才、积极培育特色企业文化、大幅度增加研发投入、加强品牌建设、努力提高资源整合能力、抓住滨海新区开发的发展契机.     

围包散装储粮堆垛结构稳定性试验研究

通过建立三面围包的单层围包储粮堆垛模型试验,并在内部进行堆粮,模拟真实的堆垛结构受力情况,得到围包堆垛结构的底部压力和侧壁压力的分布规律,相较于理论值偏小,并得到单层围包储粮堆垛随堆粮高度增加的位移变化情况,当堆粮高度增加到一定高度后,单层围包堆垛结构发生倾覆,倾覆时堆粮高度和计算得来的理论高度基本吻合。     

一组珍贵的元代社会经济史资料——读河北隆化鸽子洞出土文书

本文讨论了新近刊布的河北隆化鸽子洞出土的三件元代社会经济文书,它们广泛涉及元代的炭户制度、土地典卖、通货膨胀、官员俸禄等,为我们澄清相关的历史问题提供了重要证据.     

固原上黄村农业生态经济系统建设示范总结

固原上黄村农业生态经济系统建设示范研究始于1983年,目的在于探索黄土丘陵区建立良性农业生态经济系统的途径与技术。现经8年试验,系统的结构得到了进一步改善,生态经济效益得到了显著提高。     

不同管理风格下创业投资参与程度对创业企业绩效的影响

基于创业投资参与程度对企业绩效具有双重效应,以中国创业投资市场为研究背景,运用CVSource数据库2000-2014年的大样本数据,使用多变量回归模型,研究不同管理风格下创业投资参与程度对创业企业绩效的影响。结果发现,不同管理风格下VC参与程度与企业绩效间存在显著倒U型关系,在VC参与程度达到最优值之前,随着参与程度的增加,企业绩效随之提升,VC参与程度对企业绩效具有促进效应;但超过最优值后,随着VC参与程度的增加,企业绩效却呈递减趋势,VC参与程度对企业绩效具有抑制效应。     

How foreign direct investment promote institutional quality: Evidence from Vietnam

Using a unique dataset from a provincial competitiveness survey and the rising foreign direct investment (FDI) from joining the World Trade Organization (WTO), I find that variations in economic institutions across the provinces of Vietnam are associated with the flow of foreign investment. To overcome endogeneity problems, I use the minimum distance from each province to a main economic centre as an instrument for foreign investment inflows. The instrumental variable approach shows that the direction of influence is from greater foreign investment to better institutions. These results hold after controlling for various additional covariates, and are also robust to various alternative measures of institutions. I also find that foreign direct investment has greater short-term impacts on institutional quality in the northern provinces.     

City Management Efficiency Indexes of China's 200 Cities and Provinces [CMEICN 2007]——Issued by World Economy Research Centre of BTBU School of Economics(WERCCN) & China Economy Index Center of Beijing Circulation Industry Research Centre(BCEIC)[The firs part]

In the 21st century, China has entered into an era in which city is the principal part of development. Cities, as the basic unit of a country's social and economic development, undertake multiple functions such as political, social,economic and environmental management.     

City Management Efficiency Indexes of China＇s 200 Cities and Provinces——lssued by World Economy Research Centre of BTBU School of Economics （WERCCN） ＆ China Economy Index Centre of Beijing Circulation Industry Research Centre （BCEIC）

Resources and environment are the fundamentals for the survival and development of cities. As illustrated in ＂City Management Efficiency Indexes of China＇s 200 Cities and Provinces＂ （CMEICN 2007）, the average index of environmental efficiency of 171 cities in Chinese mainland is 0.1672, calculated by the discharge amount of industrial liquid water and the discharge amount of industrial smoke,     

职业道德建设在党政干部队伍建设中的重要性探讨

本文通过对职业道德概念理论的分析,阐述了职业道德建设在党政干部队伍建设中的重要性,也提出了在党政干部队伍职业道德建设几点重要环节。