经济机会论的实践背景分析

本文通过回顾总结我国经济体制改革历程、分析国有企业走入经营困境的根本原因,论证市场经济的核心本质特征是“机会经济”和经济机会论对市场经济的运作具有较强的操作指导性。     

承压水开采对天津滨海地铁车站-隧道系统影响的模拟研究

为探索抽水沉降对地铁系统造成的影响,以天津地区软土环境中的地铁车站-隧道系统为例,采用三维渗流-应力耦合数值模拟方法,模拟承压水抽取引起的车站-隧道连接区间沉降情况,研究沉降和差异沉降对整个系统的影响。在一定假设条件下,定量分析地铁车站-隧道系统不同部位的沉降值以及沉降导致的应力集中等现象。结果表明: 1)抽水所在承压水层的压缩量最高, 沉降最大,在向上向下扩展中,压缩量逐渐降低; 2)沉降发生时,车站结构对沉降有一定抵抗,隧道结构抵抗沉降能力较弱,由此引起近站隧道的差异沉降,导致距离车站2 m 附近的隧道顶部产生较大应力集中。     

Modeling user adoption of advanced traveler information systems: dynamic evolution and stationary equilibrium

This paper models the growth rate and the saturation market penetration level for advanced traveler information system (ATIS) products/services with heterogeneous drivers. The price of using and the benefit gained from ATIS services are considered two key factors in explaining the growth of adoption of ATIS products. The information benefit is measured as the travel time saving between equipped and unequipped drivers and evaluated by a mixed stochastic and deterministic network equilibrium model. A modified logistic type growth model is adopted to describe the cumulative adoption of ATIS products over years. The final stationary equilibrium level of ATIS market penetration is so determined that the value of the information provided will decline to the point at which no new users will find it advantageous to purchase that service. The endogenous growth and stationary equilibrium model of market penetration of ATIS services is useful for forecasting the growth process and the impacts on the system performance of ATIS.     

城市用地开发对交通的影响

城市用地开发对城市交通的影响是不容忽视的,正确分折和掌握土地开发与交通量生成之间的规律,对于解决这一问题是致关重要的,针对这一问题提出了交通量生成预测模型和道路容量评价模型,并给出了解决方案。     

关于海洋工程设备市场的分析

目前，世界范围内石油能源的紧缺使得海洋石油开发领域中的投资不断增加；未来国际海洋工程装备市场的需求将随着全球石油需求量的增加而不断增长，海洋工程设备将越来越受人们的关注而成为市场的新亮点。     

西部区域性资源开发与可持续发展的后劲研究——以甘肃省庆阳市为例

甘肃是西部地区工业资源开发的重要区域之一,多年的资源开发现实证明,区域性资源开发要与经济发展保持良性状态,必须坚持可持续发展的思路和战略,必须把潜力和后劲研究作为经济战略决策的重要手段。     

2008年我国车用发动机活塞市场分析及2009年预测

为了正确掌握我国车用发动机活塞市场现状、特点、发展情况及发展趋势,文章分别从汽车、汽油发动机、汽油发动机活塞、柴油发动机及柴油发动机活塞市场几个方面对我国车用发动机活塞的市场现状进行了比较分析,并对其2009年市场进行了预测,指出受“2大因素”影响,市场增速迅速放缓,成本、资金及市场压力巨大,预计我国2009年车用发动机活塞市场增幅不会很大,但较为稳定。     

小排量车赢得市场还要在4方面狠下功夫

随着国家对小排量汽车减征购置税政策的出台,使得小排量的销售异常火爆,但这种强势能否继续下去,还是一个未知数。文章分析了小排量车在品质、空间配置、节能环保及安全性4个方面存在的问题,指出虽然政策刺激拉动了我国的汽车消费市场,但小排量车要真正赢得市场,取得消费者信任,还必须在这4个方面上狠下功夫。     

Intrinsic Value and Market Timing of Initial Public Offerings

To avoid debates on the interpretation problem of market-to-book, the residual income model is employed to calculate the intrinsic value and estimate the extent of mis-pricing by market. Using a sample of Chinese listed companies from 1998 to 2003, the empirical evidence supports that equity market mis-pricing plays a significant role in decision making on the initial public offering. Our evidence verifies that the market timing theory can be applied to the analysis of financing behavior of Chinese listed companies, but the long-lasting effect is insignificant.     

Structural design of process decks for floating production, storage and offloading units

This work analyzes the influence of ship motion and deformation on the structural design of decks to support production plants in floating production, storage and offloading units (FPSOs). These decks are space frames with lengths ranging from 30 to 100 mr, with a variable number of rigid supports linked to the ship hull. The deck and ship hull are modeled together for naval and structural analysis. A global, coupled analysis is performed considering the deck and ship structures; sea loads are evaluated by means of probabilistic methods.