现代化港口型城区的性质、特点及功能

港口型城区是近年来随着我国港口大规模建设和发展而日益兴盛的一种城市形态.由于大多数港口的刚性扩张,新港口、新港区建设方兴未艾,带动了港口后方的工业、商业和人口的集聚,由此形成了港口型城区,典型的如营口的鲅鱼圈、日照的石臼、上海的临港新城等.     

ARIMA计量技术下河南省农民增收的预测模型研究

笔者根据河南省1978年～2005年的农民人均纯收入统计数据,将这些数据进行平稳化、零均值化处理,并利用时间序列的自相关函数,偏自相关函数的性质,确认数据所适合的模型.通过对样本数据所做的回归拟合模型定量分析,从而为河南省"十一·五"规划提供量化指标依据.     

我国科技产业发展的多方融资问题研究

推进我国科技产业发展,必须着力解决科技产业的融资问题.在增加各级财政投入、扩大企业自筹资金的基础上,采取各种方式,完善、扩展科技产业融资渠道.建立风险补偿机制,完善各项政策,加强法律法规建设,从而营造科技产业融资的良好环境.     

Corporate Risk Management under Information Asymmetry

This paper examines the financial and operational hedging activities of US pharmaceutical and biotech firms that are subject to a high level of information asymmetry stemming from R&D investments during 2001–2006. We find evidence in support of the information asymmetry hypothesis à la Froot, Scharfstein and Stein (1993) that hedging helps mitigate the under‐investment problem. Specifically, we find that the use of financial derivatives is associated with greater firm value and that the value enhancement is larger for firms subject to greater information asymmetry and better growth opportunities. There is a synergy between financial hedging and operational hedging where the latter is used to counter product development risk. The results are robust with respect to alternative performance measures, industry‐specific growth measures, and the endogeneity problem. Our work is differentiated from existing studies that examined commodity‐based industries without addressing information asymmetry.     

辗辊式井下采油筛管的研制及应用

针对油田在用井下采油筛管防砂过程中出现的砂堵等问题,依据能量转换原理,研制出一种辗辊式井下采油筛管。辗辊式筛管既防砂又不发生砂堵,还具有穿透性和节能效果明显等特点,不仅可用于一般的采油井、含砂量大和压裂的井,还可用于污水泵的保护。     

污水管段设计流量的图论解析

针对污水管段设计流量计算中较易出现理解偏差与计算错误的问题,引入图论的方法,用节点与管段的关联关系对污水管道节点流量和管段流量进行定义并求解,明确了相关物理概念的界限,能使计算思路清晰,便于理解记忆。     

Post-SARS tourist arrival recovery patterns: An analysis based on a catastrophe theory

In 2003, the Severe Acute Respiratory Syndrome (SARS) ravaged many Asian countries. The outbreak of SARS caused a crisis in the tourism industry in many parts of Asia in that year. The purpose of this study is to examine and to compare the post-SARS recovery patterns of inbound arrivals from Japan, Hong Kong and USA in Taiwan. Taking the cusp catastrophe model as its foundation, this study proposes a well-grounded approach to understanding the nature of the recovery processes and to explaining the difference between the recovery patterns displayed by arrivals from Japan and those from Hong Kong and USA. Implications regarding tourism promotion policies are drawn from the analysis.     

高校课堂教学中知识转移影响因素及过程分析

知识转移是近年来企业创新研究的方向之一,课堂教学也是一种知识转移的过程,运用知识转移相关理论对高校课堂教学提高教学效果具有参考意义,教师、学生、转移的知识、教师与学生的距离对提高知识转移的效果、促进教学相长具有重要影响。     

流动性平衡、价值创造及金融产品设计原则——基于符号经济系统和实体经济系统互动的视角

本文运用含有实际余额效应的瓦尔拉斯模型描述了符号经济系统与实体经济系统的基本平衡条件,并指出流动性(信用)是通过影响价值创造过程而间接地创造价值,但流动性的过度扩张可能导致符号经济系统独立于实体经济运行而与价值创造无涉,打破两系统的基本平衡关系。本文最后通过对美国新金融模式的分析,说明我们仍需按照资金转移及分配和风险转移及分配两种基本中介功能相分隔的原则来设计金融产品,才能避免信用过度扩张而导致的流动性危机。     

Analysis of Investment Returns by Computer

This paper concerns itself with providing the means by which a decision-maker may choose among competing projects and arrive at the optimal allocation of the firm's scarce dollar resources. The problem is handled in the mathematical programming framework. The model holds with or without the assumption of capital rationing and permits the incorporation of the effects of growth and of alternative financial mixes on the cost of capital for the firm. When iterated, the model equates marginal revenue to marginal cost, thus yielding the optimal investment level for the firm. Several investment alternatives not considered in the existing literature on the subject are examined, and some novel interpretations of the constraints and results are offered.