持有金融机构股份与企业资金配置效率

采用2007年到2011年我国上市公司数据,就持有金融机构股份对投资现金流敏感度以及投资效率的影响进行分析,研究结果显示:持有金融机构股份会提高企业的投资现金流敏感度,会降低企业的投资效率,导致企业过度投资行为更加严重,而这种现象在民营企业中更加显著。     

Testing stationarity of functional time series

Economic and financial data often take the form of a collection of curves observed consecutively over time. Examples include, intraday price curves, yield and term structure curves, and intraday volatility curves. Such curves can be viewed as a time series of functions. A fundamental issue that must be addressed, before an attempt is made to statistically model such data, is whether these curves, perhaps suitably transformed, form a stationary functional time series. This paper formalizes the assumption of stationarity in the context of functional time series and proposes several procedures to test the null hypothesis of stationarity. The tests are nontrivial extensions of the broadly used tests in the KPSS family. The properties of the tests under several alternatives, including change-point and I(1)$I\left(1\right)$, are studied, and new insights, present only in the functional setting are uncovered. The theory is illustrated by a small simulation study and an application to intraday price curves.     

基于工序的油藏经营工资制度简析

文章分析了现代油藏经营管理、现行工资制度的特点,探索基于工序的油藏经营工资制度,即基于工序的定额工资制度,以期逐步完善现有的油藏经营工资制度,更有效的激励员工,实现油藏效益与个人收益的紧密联系及最大化。     

浅谈医院信息系统的安全维护

医院信息系统（HIS）在当今医院管理中发挥着不可替代的作用。该系统的广泛应用,给医院带来了巨大的经济效益。然而,一旦HIS系统运行出现问题,将给医院带来不可估量的损失,因此必须从中心机房、网络设备、服务器及数据库管理、病毒防范等方面采取相应的安全维护措施,以保障HIS系统的安全运行。     

公路工程施工放样中常见问题的处理探讨

公路工程施工放样是公路工程建设的重要内容,对保证工程进度与质量至关重要。本文阐述了公路施工放样技术的重要性,对精化区域大地水准面、高低等级公路施工中的测量放样问题进行了较详细的探讨和总结,并提出了一些有效的处理措施。     

中铁快运北京分公司配送网络优化研究

随着社会经济的发展,货物运输呈现几大趋势,其中包括货物运输的物流化。而物流作业(装卸搬运、储存、运输、包装、流通、加工、信息处理等)的很大部分都是在物流节点上完成的,所以,配送中心的选址是否合理直接影响配送中心各项经济活动的成本,同时也关系到企业的长久发展。针对中铁快运公司的具体实例,提出可行的网络优化设计方案,为中铁快运的决策提供支持。     

基于SE-DEA模型的广东城市物流效率评价分析

结合城市物流系统的特点,以民用汽车拥有量、通车里程和物流业从业人数为投入指标、地区生产总值和货物周转量为产出指标构建了城市物流效率评价指标体系,运用SE-DEA评价模型,以广东省21个主要城市为研究对象,对各城市物流系统的技术效率、纯技术效率、规模效率、超效率进行了对比分析,并提出了物流效率值相对较低的城市物流系统建设与改进建议。     

Different Problem,Same Solution: Contract‐Specialization in Venture Capital

Real‐world financial contracts vary greatly in the combinations of cash flow contingency terms and control rights used. Extant theoretical work explains such variation by arguing that each investor finely tailors contracts to mitigate investment‐specific incentive problems. We provide overwhelming evidence from 4,561 venture capital (VC) contracts that this tailoring is overstated: even though there is broad variation in contracting across VCs, each individual VC tends to specialize, recycling familiar terms. In fact, a VC typically restricts contracting choices to a small set of alternatives: 46% of the time, a VC uses the same exact cash flow contingencies as in one of her previous five contracts. We document specialization in both aggregated downside protection, and in each individual cash flow contingency term. Such specialization remains economically and statistically significant even after controlling for VC and company characteristics. We also find that VCs learn to use new contractual solutions from other VCs in her syndication network. Our findings challenge the traditional premise that each investor selects from the universe of combinations of terms to match an investment's unique contracting problem. Rather, the cumulative evidence indicates that contract‐specialization arises because investors better understand payoff consequences of familiar terms, and are reluctant to experiment with unknown combinations.     

协同学在多级库存系统分析中的应用初探

讨论了协同学的基本概念;特别讨论了绝热消去方法(伺服原理)在协同学方法论中的作用、地位和意义;并运用协同学处理问题的一般步骤分析了多级库存系统,得到了序参量方程和势函数。