密封胶在拉索索端结构中的应用研究

索端结构是拉索的防护薄弱环节,在索端结构中增加密封胶措施是索端密封的一次探索。选取了几种不同的密封胶分别与拉索聚乙烯护套进行粘结,对提高斜拉索的耐久性和安全性有一定的意义。     

高性能电子商务网站前端设计理念研究

随着电子商务的发展,电子商务网站数量越来越多,流量越来越大,页面元素也越来越多,这就使得电子商务网站的页面响应速度变慢,为了使电子商务网站前端提高其性能,本文首先对相关概念进行界定,然后找出影响电子商务网站前端性能的因素,最后根据这些因素提出高性能电子商务网站前端设计理念。     

Some Determinants of Core Competencies: Evidence from a Binary-Logit Analysis

Despite the increasing recognition of the salience of core competencies in the process of competition, the notion of core competencies has remained largely ambiguous in the literature. Neither is it clear what strategies, institutions, and resources are necessary for developing and sustaining core competencies. This paper uses the binary-logit model to explore the determinants of core competencies, and identifies investment in intangible assets, marketing/promotional activities and firm size as significant determinants of core competencies. An evaluation of the technology strategies of two competence-seeking firms also points to the increasing salience of intangible assets, decentralization/globalization of the R&D function, and the intensive search for knowledge and capabilities.     

铁路三线大桥帽梁无支架法施工技术及受力检算

帽梁施工采用无支架法施工相对满堂支架法施工而言,具有施工简便,对地面承载力无要求,节约大量钢管,降低施工成本,缩短工期等优点。文章针对洛湛铁路旺甫1号三线大桥设计出穿心棒无支架法施工帽梁的支撑系统方案,成功地解决了三线大桥因帽梁砼重量大、跨度长而致使常用材料不适合做承托梁的问题,并对支撑系统进行了受力检算。     

我国污染治理方式的现实选择——基于市场交易方式与政府管制的比较

我国传统治理污染的方式以政府管制为主，包括直接管制和环境税费两种。与传统的政府管制手段相比，目前国际上治理污染的新兴制度是排污权交易制度，这一制度具有理论上的优越性，并已为发达国家的实践所证明。但污染治理方式的选择会受到市场化程度、污染物类型与分布、环境产权明晰程度、制度实施成本等诸多因素的制约。对于中国这样的发展中国家而言，需要综合运用多种方式来综合治理环境污染。     

Noise trading and prime and score premiums

This paper documents that a common element drives the time-series variation of the premium pricing of Primes and Scores. I argue that this common element is noise trading. The noise trading model of Delong, Shleifer, Summers and Waldmann (1990) predicts that returns on assets that are predominantly traded by noise traders will be correlated, since the misperceptions of noise traders are cross-sectionally correlated. Consistent with the noise trading hypothesis, changes in the average premium of Primes and Scores, which are predominantly traded by individual investors, are correlated with both changes in average discounts of closed-end funds and small firms returns. These empirical facts provide additional evidence that noise traders can affect security prices.     

六西格玛管理方法在化纤生产中的应用

运用六西格玛管理方法,通过数据积累和统计分析,找出了影响前纺卷绕断大头和成品优等品率的主要因素,使用相关分析工具,对关键参数进行过程能力对比分析,找到了解决问题的有效途径,循此途径解决问题后,提高了产品质量,增加了经济效益.     

An experimental investigation of soft price caps in uniform price auction markets for wholesale electricity

This paper presents the results from an auction experiment using industry professionals and student participants who compete in a simulated wholesale market for electricity. Motivated by the intervention by FERC in response to the “meltdown” of the California spot market, we investigate the effect of including a “soft” price cap in a uniform price auction as a means of mitigating high prices. When prices are driven above the soft cap, offer curves become flat, in contrast to the hockey stick shape observed in a typical uniform price auction for electricity. This flat offer curve leads to market prices that are relatively insensitive to both generation costs and demand reductions.      

Auditor Reputation Under Different Negligence Regimes

Do auditor reputation effects evolve the same way under precise negligence as under vague negligence? Or are there differences? We assume that investors update their beliefs on unobservable auditor quality when an auditor discloses an inaccurate report. We call this a reputation effect. A necessary condition for reputation effects to occur is that, ex ante, investors expect ‘good’ auditors to take more care than ‘bad’ auditors such that ‘good’ auditors are less likely to issue an inaccurate report. Consistent with empirical evidence, we assume that wealthier (‘good’) auditors tend to take more care than less wealthy (‘bad’) auditors. We find that under vague negligence, reputation effects will occur, inducing both types of auditor to increase the level of care taken. A ‘good’ auditor is likely to exert excessive care. Then, even in the absence of auditor risk aversion, a (properly defined) liability cap is necessary to induce efficient incentives. A contractual liability cap is preferable to a legally fixed liability cap. Under precise negligence, a ‘good’ auditor will exert the standard of due care. However, a ‘bad’ auditor will also do so if sufficiently wealthy. Consequently, ex ante, investors do not expect different levels of care to be taken or reputation effects to occur. A liability cap is not desirable. This paper highlights the importance of non‐legal sanctions in auditor liability. Finally, it links the ‘reputation’ and ‘deep pocket’ hypotheses, both of which have attempted separately in the past to explain the positive correlation between auditor size and auditor quality.     

澳门高端服务业:产业走向与发展效应

高端服务业是伴随全球产业结构调整及经济结构高级化而发展起来的现代服务产业。在澳门经济转型升级和城市竞争力提升中,高端服务业发展具有重要的战略地位。文章在探讨澳门高端服务业发展现状、特征及依据的基础上,采用数据包络分析方法 (DEA),对澳门高端服务业的发展效率进行了实证分析,提出了澳门高端服务业发展的政策路径。