大功率紧凑型行星机构的设计

国内薄层复杂地质煤层的开采,需要适应该煤层的采煤机结构小,功率大。由于结构限制,传统的行星机构结构已经无法满足大功率,小结构的要求。本文介绍一种改进结构的行星机构,该机构具有承载能力大,结构紧凑等特点。     

闭路电视监控系统在永福火力发电厂的应用

文章介绍了工业闭路电视监控系统在永福火力发电厂的应用,重点介绍了该系统的组成及功能特点等,并提出了一些优化设计的建议.     

基于聚类分析的国有银行与股份制银行比较

本文首先在企业竞争力理论基础上设计了银行竞争力评价的指标体系,然后采用聚类分析方法,对2001～2004年重庆银行业12家样本银行按照资源、能力和综合竞争力3个方面分别进行自动分类,最后提出了国有银行股份制改革后关键在于深层次推进制度建设等观点。     

浅谈"转变政府职能"

为了适应社会转型,推动经济体制和政治体制改革,当前,我国以转变政府职能为核心内容的公共行政改革方兴未艾。从住宅装修噪声污染失控现象入手,寻根溯源地剖析国家有关部门因误读转变政府职能而导致立法失误问题,进而就正确解读提出建议,供国家有关部门作立法参考。     

内部收益保证下养老基金的最优资产配置

研究内部收益保证下DC型养老基金的最优资产配置问题。利用鞅方法，在HJM利率期限结构下求得了最优资产配置的显性解。结论表明最优投资策略分为四部分：投机策略、利率套期保值策略、基准组合的复制策略及一揽予债券卖空策略。最后对最优策略的动态行为进行了数值分析。     

依靠技术创新提升中国服务贸易国际竞争力

近年来,国际服务贸易无论是在贸易规模还是在贸易结构上都发生了巨大变化,这对我国服务贸易的发展而言,既是机遇也是挑战。我们应当以全球贸易发展为背景,积极调整我国服务贸易的发展结构,依靠技术创新来提升我国服务贸易的国际竞争力。     

上市公司股权制衡的混沌模型

上市公司股权结构问题一直是公司治理的焦点,目前的研究都运用线性研究方法,但其得出的结论往往很难解释呈现非线性的经济现象。本文的创新之处在于:运用新经济理论与混沌理论相结合的非线性思维的方法,利用最新的上市公司财务数据分析了大股东的最佳持股比例范围,设计了上市公司大股东持股的混沌模型,从而得出第一大股东持股比例范围在(0,19.21%)为佳,并在此基础上利用Logistic方程,构建了理想的上市公司股权制衡模型。     

Do Inflation‐Linked Bonds Still Diversify?

The diversifying power of inflation-linked (IL) bonds relative to traditional asset classes has changed significantly. In this paper, we study the dynamics of conditional volatilities and correlations for three asset classes, IL bonds, nominal bonds and equities, in the USA and Europe. Using a DCC-MVGARCH for the period 1997–2007, we highlight the change that took place in 2003. Although IL bonds once had definite diversification power, they are now highly correlated with nominal bonds and have reached similar volatility levels. As a result, the two asset classes are practically substitutable. This seems to be due to more stable inflation expectations and to a more liquid IL bond market. Although diversification was a valuable reason for introducing IL bonds in a global portfolio before 2003, this is no longer the case. Dynamic portfolio optimisation using our estimates of conditional correlations and volatilities clearly demonstrates that the optimal weight of IL bonds in a portfolio decreased sharply in 2003 in favour of nominal bonds and equities.     

Bringing competition to urban water supply*

This paper proposes a market‐based reform that would introduce competition into the provision of urban water. This proposal calls for a decoupling of infrastructure control and ownership of water whereby the property rights to water would be transferred to private hands. The proposal involves periodically allocation (e.g. by auction) of existing water stock held in urban catchments to virtual suppliers who then compete in providing bulk water. This change when coupled with effective third party access and retail competition would lead to a competitive market for the provision of urban water. The approach aims to address concerns over inefficient pricing and infrastructure provision under the current arrangement.     

基于竞价上网的煤电纵向一体化及其效率

煤电矛盾的根源是价格双轨制和地区生产不对称性，纵向兼并能有效解决现阶段煤电矛盾，但一体化是否有反竞争效应却值得商榷。本文通过纵向兼并交易的博弈模型，研究电力竞价上网背景下，存在上下游纵向兼并的煤电交易行为均衡路径及其效率，认为煤电纵向兼并的竞争效应与反竞争效应并存，但如果煤炭可现货交易，竞争效应大于反竞争效应。文章最后提出了相应的政策建议。