汽车副仪表台总布置计算机辅助设计

本文通过现有车型的实际布置经验,结合国内外几款车型的总布置数据,以CATIA V5软件为支撑,对车身内部副仪表台总布置的基本原则、过程、方法及CAD和人机工程学在副仪表台的总布置中的应用进行了总结和研究.通过运用车身总布置工具,讨论了人机工程学与驾驶员乘坐舒适性、操纵性之间的关系,然后将上述理论应用于某款新改型车的副仪表台总布置设计的实际过程,从改型设计的具体要求出发,结合人机工程方法较好的完成了汽车副仪表台的总布置.     

Wal‐Mart innovation and productivity: a viewpoint

Abstract Technology effects, business process development, and productivity growth are considered in the context of a single company: Wal‐Mart. The starting point is the 2001 McKinsey Global Institute report, which finds that over 1995–2000, a quarter of U.S. productivity growth is attributable to the retail industry, and almost a sixth of that is attributable to Wal‐Mart. Wal‐Mart is interesting as well because of its rapid growth in Canada. This is now Canada's largest private sector employer. We also consider other evidence relevant to public policy formation concerning Wal‐Mart and conclude with a discussion of options for partially filling important data gaps.     

Forecasting the yield curve with linear factor models

In this work we compare the interest rate forecasting performance of a broad class of linear models. The models are estimated through a MCMC procedure with data from the US and Brazilian markets. We show that a simple parametric specification has the best predictive power, but it does not outperform the random walk. We also find that macroeconomic variables and no-arbitrage conditions have little effect to improve the out-of-sample fit, while a financial variable (Stock Index) increases the forecasting accuracy.     

Information in balance sheets for future stock returns: Evidence from net operating assets

In this paper, we show that the negative relation of net operating assets (NOA) with future stock returns first documented by Hirshleifer et al. (2004) applies to both net working and investing pieces of NOA, while it is mostly driven by asset NOA components. Predictability of returns is significant only for their unexpected parts (unrelated to past sales growth) and not uniform across different industries. We also find that only high (low) NOA firms with asset expansion (contraction) and weak (strong) background of profitable investments exhibit negative (positive) abnormal returns. Our evidence suggests that the NOA anomaly may be present due to a combination of opportunistic earnings management and agency related overinvestment.     

A market-based proposal for encouraging water use efficiency in a tourism-based economy

Barbados is almost wholly reliant on groundwater as its source of water largely due to replenishment during the wettest 1-3 months of the year. Annual renewable freshwater resources place it in the top 15 of the world's most water scarce countries. Acknowledging the scope of the problem, government officials have noted that the amount of water available for economic activity has become very limited and might therefore affect future development. Most of the proposed measures to date have focused on mains replacement and increased energy efficiency but little thought has been given to demand-side management. This study therefore attempts to provide a framework for managing the water resources in the island's single largest industry: tourism. It is conceptualised that a system of tradable permits would not only enhance the management of water resources, but should also reduce the cost of water resources to hotels.     

用哈希单元实现MPLS中分类规则表查询

因特网地址查询技术是导致IP路由器速度降低的限制因素之一。用于地址查询的传统算法已经不能适应日益增加的网速要求。基于IXP2400硬件哈希单元的分类规则表查询技术，采用5元组对FEC的分类，将分类从原IP转发中独立出来，极大提高了网络效率，同时也相对容易实现对传统路由器的升级。     

第四方物流和第三方物流战略合作可行性分析

文章从现实经济活动参与人的有限理性和有限信息出发,简要介绍了有限理性博弈原理,在此基础上建立了重复动态博弈模型和存在私人信息的经济模型,利用复制动态方程的稳定性和信息不对称讨论了第四方物流服务商与第三方物流服务商合作的可行性.     

How much inflation is necessary to grease the wheels?

Tobin's proposition that inflation “greases” the wheels of the labor market is studied using a simple dynamic stochastic general equilibrium model with asymmetric wage adjustment costs. The simulated method of moments is used to estimate the nonlinear model based on its second-order approximation. Optimal inflation is determined by a benevolent government that maximizes the households’ welfare. Econometric results indicate that nominal wages are downwardly rigid and that the optimal level of grease inflation for the U.S. economy is about 0.35% per year, with a 95% confidence interval ranging from 0.04% to 0.87%.     

Optimal monetary policy in a ‘sudden stop’

In the wake of the 1997-98 financial crises, interest rates in Asia were raised immediately, and then reduced sharply. We describe an environment in which this is the optimal monetary policy. The optimality of the immediate rise in the interest rate is an example of the theory of the second best: although high interest rates introduce an inefficiency wedge into the labor market, they are nevertheless welfare improving because they mitigate distortions due to binding collateral constraints. Over time, as the collateral constraint is less binding, the familiar Friedman forces dominate, and interest rates are optimally set as low as possible.