中小企业融资难的问题及对策研究

如何采用积极的方法解决中小企业融资难的问题已经迫在眉睫.本文从中小企业融资难的现状入手,重点分析融资难的原因,探寻解决途径.对中小企业融资难问题提出一孔之见.     

LEO卫星通信系统的呼叫接入性能分析

在均匀业务模型的基础上，根据LEO卫星通信系统自身特点，提出了一种简单有效的呼叫接入控制策略，这种策略能在非均匀业务下较好地工作，此时系统新呼叫阻塞率和切换呼叫失败率能达到更好的平衡。在分析随机接入（RANDOM）算法和预留保护信道（GC）算法的基础上，进行了计算机仿真，并给出了相应的仿真结果。     

运用项目信息系统 提升建筑企业的竞争力

文章指出建筑企业应充分利用信息技术所带来的巨大生产力,不断创新,其中包括利用项目信息系统(PIS)从多方面对企业的业务流程与管理方法、手段等进行重组和改革,进而提升建筑企业的竞争力,更好地求得生存和发展。     

Investor Reaction to Inter-corporate Business Contracting: Evidence and Explanation

We examine the stock market reaction to 1227 inter-corporate ordinary business contract announcements reported by Dow Jones between January 1, 1990 and December 31, 2001. Around contract announcement dates, we find statistically significant positive average abnormal returns and abnormal trading volume for contractors, but insignificant positive abnormal returns and negative abnormal volume for contractees. Cross-sectionally, contract announcement period returns are higher for contractors who are small relative to the contract size, have higher return volatility, larger market-to-book ratios and higher profitability. The announcement period returns of contract-awarding firms are not significant and are only marginally related to cross-sectional explanatory factors. The results are consistent with two explanatory stories: contractor quasi-rents induced by the winner's curse and information signalling about contractor production costs. The results are not consistent with perfect competition, with contracts having positive net present values for both parties, and with a version of incomplete contracting theory.     

基于建立估价模型的企业并购绩效评价研究

企业并购绩效可借助一些方法加以评价,本文重点研究建立估价模型评价并购绩效。本文首先深入研究建立估价模型评价企业并购绩效的基本原理；在此基础上,通过对具体案例并购绩效实证研究进一步验证文中观点。本文认为建立估价模型、借助于EVA评价企业并购绩效是一种比较理想的方法。     

中小企业成长的进化规律与可持续成长

文章从企业生命体演进的视角,探讨了中小企业成长过程的本质,认为中小企业成长的是一个动态的进化过程;而成长的进化性规律对中小企业走出各种成长误区,实现可持续成长有现实的启发意义。     

数据包络分析有效性理论的一点探索

文章给出经典的基于输入的和基于输出的数据包络分析(DEA)模型,以及把基于输入和基于输出的模型相结合的相对效率模型,并且把这些模型引用到评价证券的相对有效性上,以风险作为输入,期望收益率作为输出,便可以用DEA模型评价每只证券的相对有效性.     

Economics and underdetermination: a case study of urban land and housing economics

Underdetermination, associated with the Duhem–Quine thesis,is a familiar if under-researched theme in economics. In thelight of this, we examine the development of urban land andhousing economics. Through its Cartesian dualistic delineationof theory and data, the contemporary mainstream approach appearsunable to circumvent the problem of underdetermination. In effect,it employs the strong version of Duhem–Quine in its retentionof the assumption of a single, unitary competitive market (andassociated access–space trade-off). Conversely, we highlightthe affinity of Ely's (and the later Columbia School's) approachto pragmatists Dewey and Peirce, which provides a more fruitfulbasis for explanation.     

休闲与生活质量关系的量化考察:国外研究进展及启示

参与休闲活动能够提高人们的生活质量,这是国内学界普遍认同的观点.然而这个观点更多地是从逻辑推演而来,还缺乏实证的量化考察.对休闲与生活质量关系的量化考察,涉及主客观两类指标的设置;而其最终价值在于帮助决策者制定和调整相关政策,采取有效措施,从而全面改善居民的休闲状况,提高其生活质量.     

Another strategy to assess sustainable development

The goal of sustainoble development is to preserve sustainabitity trod simultaneously prevent catastrophe in a man-land .system. However, almost all the existing approaches to assessing sustainable development are to measure the sustainability. namely appraise from the obverse side of the sustainable development. So it seems necessary to attack the same task on the reverse, namely to measure the passibility of eatostrophe. In this paper, with a case study of Tianjin, China. we employ catastrophe theory and models to integrate Tianjin＇s sustainable development indicators, and then deduce the catastrophe risk index （ CRI） to present the level of catastrophic possibility in the city. Applying catastrophe theory, is a new strategy to assess sustainable development and shows great practical significance, especially for those developing regions or countries, who always give more priority to their economy and therefore have more obligation to make sure whether their social economic activities might bring forth any ecological environment catastrophe. Besides, being both qualitative and quantitative, the approach could be employed to explore not only static characteristics bat also dynamic mechanism of man-land system. Although our work is only a maiden attempt and still calls for further effort to improve it, the case study of Tianjin in this paper would assure as the great promising future to apply, catastrophe theory to sustoinable devetopment modeling,