民用建筑群风环境设计评价与分析

民用建筑群风环境的好与坏直接影响着人们生活环境是否宜居,本文针对陕西省安康某建筑群(包含住宅、办公楼和商用建筑)设计文件进行室外风环境评价与分析,通过CFD软件模拟夏季、冬季及全年最大风荷载下多个典型工况的进行分析,对本项目设计文件进行评价并给出相应的建议,为此类大型民用建筑群室外风环境设计提供相应的理论依据和参考.     

Operational risk quantified with spectral risk measures: a refined closed-form approximation

The quantification of operational risk has become an important issue as a result of the new capital charges required by the Basel Capital Accord (Basel II) to cover the potential losses of this type of risk. In this paper, we investigate second-order approximation of operational risk quantified with spectral risk measures (OpSRMs) within the theory of second-order regular variation (2RV) and second-order subexponentiality. The result shows that asymptotically two cases (the fast convergence case and the slow convergence) arise depending on the range of the second-order parameter. We also show that the second-order approximation under 2RV is asymptotically equivalent to the slow convergence case. A number of Monte Carlo simulations for a range of empirically relevant frequency and severity distributions are employed to illustrate the performance of our second-order results. The simulation results indicate that our second-order approximations tend to reduce the estimation errors to a great degree, especially for the fast convergence case, and are able to capture the sub-extremal behavior of OpSRMs better than the first-order approximation. Our asymptotic results have implications for the regulation of financial institutions, and may provide further insights into the measurement and management of operational risk.     

VIX term structure and VIX futures pricing with realized volatility

Using an extended LHARG model proposed by Majewski et al. (2015, J Econ, 187, 521–531), we derive the closed-form pricing formulas for both the Chicago Board Options Exchange VIX term structure and VIX futures with different maturities. Our empirical results suggest that the quarterly and yearly components of lagged realized volatility should be added into the model to capture the long-term volatility dynamics. By using the realized volatility based on high-frequency data, the proposed model provides superior pricing performance compared with the classic Heston–Nandi GARCH model under a variance-dependent pricing kernel, both in-sample and out-of-sample. The improvement is more pronounced during high volatility periods.     

When Do Qualitative Risk Disclosures Backfire? The Effects of a Mismatch in Hedge Disclosure Formats on Investors' Judgments

Disclosure standards mandate the quantitative disclosure of hedging‐instrument‐related risks but not the disclosure of hedged‐item‐related risks. We examine how a match (mismatch) in formats, caused by making quantitative (qualitative) hedged item disclosures alongside quantitative hedging instrument disclosures, affects investors' integration of information from these two related disclosures. Our first experiment varies the hedged item disclosure format (quantitative or qualitative) and the portion of risk hedged (small or large). We find that when disclosure formats are mismatched, the less comparable nature of the two disclosures caused investors to neglect the offsetting relationship when assessing net risks. As a result, risk and investment judgments were influenced by the more prominent quantitative hedging instrument disclosures. Our second experiment finds that the use of a qualitative debiaser that clarifies the relationship between the two disclosures led to the integration of information and mitigated this effect.     

知识型员工双重社会网络对企业创新绩效作用机制研究

基于企业基础资源观和组织学习理论，从知识型员工个人和组织社会网络两个方面构建知识型员工双重社会网络影响企业创新绩效的理论模型，分析知识共享、组织学习及资源整合在员工双重社会网络对企业创新绩效影响机制中的作用。结果表明：知识型员工双重社会网络对科技型企业创新绩效的作用路径有3条，资源获取与整合、知识共享与学习及员工动态创新能力分别在其中发挥中介作用；在不同类型组织文化环境中，知识型员工双重社会网络对企业创新绩效的作用特征、作用重点以及作用机制存在显著差异，内部整合维度主要通过知识共享和组织学习影响企业创新绩效，外部适应维度主要通过隐性知识传播和资源整合影响企业创新绩效。     

论生态经济系统稳态

本文论述了生态经济系统非平衡稳定态的概念、特性及其实现的途径。指出生态经济系统稳态,是非平衡的,对外全面开放、激烈竞争、充分利用涨落作用,对内协同、有序、自组织、自适应、自催化、且有非线性作用和支配性、良性运转、进展演替的耗散结构状态。生态经济系统平衡的提法应被生态经济系统稳态的概念所取代。     

信息时代中小企业的营销创新分析

当今社会科学技术突飞猛进，知识经济初见端倪，信息革命正迅猛的改变人们的生存环境，人们开始从工业社会进入信息时代，信息技术在企业广泛渗透到生产开发，经营管理的全过程中，成为他们发展的基本依据和重要手段。信息化正从整体上引导着企业经济和社会发展的进程。信息技术将成为企业经济发展的关键因素。从改革开放的初期开始，中小企业就不断涌现，成为推动我国经济发展的一支重要力量。中小企业的优势在于：自身规模小，机制灵活，且产品价格低，能满足人们多样化需求。随着我国加入WTO，电子商务的构建，信息时代的来临，信息化正从整体上引导着企业经济和社会发展的进程。激烈的市场竞争环境使我国中小企业日益暴露出竞争力量差，技术力量薄弱的自身劣势。中小企业普遍存在管理水平低下，资金和人才缺乏，信息化程度低下等问题。     

浅析企业战略成本管理

阐述战略成本管理的核心-目标成本，并对其的制定，执行与控制等主要环节做了简要的分析，同时结合企业实际强调实施战略成本管理应从自我评价入手，对各种影响因素进行分析。建立具有中国特色的成本管理新模式。     

基于因子分析的我国区域研发能力差异比较研究

由于经济、科技发展水平不同,我国各地区在研发能力上存在较大的差异.为了对我国区域研发能力差异进行定量化分析,本文引入了研发投入强度、研发经费相对规模、研发人员相对规模、主要检索工具收录论文相对数量、授权专利相对数量、技术市场相对规模、新产品产值相对规模等指标,根据(2006年中国科技统计年鉴>提供的数据,通过因子分析,对我国各省区研发能力差异进行比较评价.     

“宪政转轨论”评析

中俄改革的比较研究 ,一直是新兴的转轨经济学关注的热点。1 998年俄罗斯爆发金融和经济危机 ,激进改革的支持者一度趋于沉寂。然而 ,从 1 999年下半年开始 ,俄罗斯经济出现转机 ,2 0 0 0年经济增长居世界第一 ,GDP增幅达 8 3 %。与此同时 ,中国经济改革进入攻坚的中期阶段。在这一关键阶段 ,渐进改革积累的矛盾日趋严峻 ,同时还面临加入WTO市场化改革滞后的外在压力。毫无疑问 ,中国经济仍要进行重大调整和改革。在这一背景下 ,国内外经济学界又在进一步探讨中俄改革的道路和方式问题。本文是对目前讨论的一个著名观点“宪政转轨”论进行分析和批驳。