互联网行为管理系统(BCS)中精简TCP/IP的实现

文章介绍了对防火墙通用TCP/IP实现的修改,经修改过的TCP/IP实现将在代码量、协议的完备性、内存的开销、总体性能方面得到提高。     

中国国际快递业务市场分析

本文介绍了中国的国际快递业务市场现状,分析了市场上的竞争主体和它们的市场地位,并通过研究国际快递业务市场中的竞争因素,比较了跨国快递公司和EMS在这一市场中的竞争优劣势,为企业提供制定竞争策略的参考.     

Exchange Rate Pegs, Fiscal Policy and Credibility

In a fixed exchange rate regime, an exchange rate change can be a swift way to change the real exchange rate in the short run. Fiscal policy also affects relative prices, and fiscal policy response to various types of shocks can therefore be crucial for the credibility of an exchange rate peg. We develop a model within which fiscal policy plays a crucial role for ensuring the viability and thus credibility of an exchange rate peg. We use the insights of this model to take a closer look at Denmark, which has successfully pursued a fixed exchange rate policy since 1982.

The French commitment to European monetary integration: A review of the two EMS crises (1981–83, 1992–93)

This paper focuses on the process of exchange rate management during the two European Monetary System(EMS) crises, in 1981–83 and 1992–93, and examines the factors which led the French governments to adhere to the EMS. France's strong franc (franc fort) policy is a useful test case for maintaining national commitment to European monetary integration. The origin of the franc fort policy can be traced back to the exchange rate crisis of 1981–83. By actively supporting European institutions and emphasizing the emergence of a strong and united European common currency, France discovered the way to bolster confidence in her economic policy. Beyond this focal point, political justification and economic rationality became mutually reinforcing, configuring French national preference in European monetary integration. The response of the French government to the EMS crisis of 1992–93 was more consistent compared to the response to the 1981–83 crisis, and reflected the accumulation of loyalty to European monetary integration. This loyalty, however, was made neither from purely economic calculation nor out of normative commitment French European monetary policy reflected the interaction between domestic politics and European monetary integration. The French commitment to the franc fort also was based on domestic political bases such as the existence of a core policy group, a centralized policy‐making structure, and an issue linkage between the franc fort and European integration.     

Introducing Environmental Management in the Hotel Industry

Summary

The hotel industry in Jamaica, like so many other tropical destinations, markets itself on the “3-Ss”-sea, sun, and sand. Hotels ring the north coast of the island in four main resort areas (i.e., Negril, Montego Bay, Ocho Rios, and Port Antonio). Located in sensitive coastal ecosystems, most of Jamaica's hotels face the challenge of reducing the environmental impact of their operations while meeting the increasing demand of a growing tourism industry.

This article presents a case study of the introduction of environmental management practices and systems in the hotel industry in Jamaica over the past 3 years to provide an answer to the environmentally sustainable tourism challenge. It describes the programmatic approach, the results at both the property and industry level, and the lessons learned in replicating the approach to other tropical tourism destinations in the Caribbean and Latin America.     

The Collapse of the ‘New EMS’: An Interpretation

Existing theoretical models cannot explain the following features of the EMS and its crisis in 1992: its progressive hardening from 1987 onwards; the fact that credibility was shared the progressive deterioration of credibility after the first Danish referendum without changes in the economic fundamentals. This paper argues that the reason lies in the fact that the literature has not accounted for the changes in the perceived prospects of EMU. We show that an adjustable peg regime that incorporates these prospects can explain the three features listed above.     

Integrating expected coverage and local reliability for emergency medical services location problems

Daskin's MEXCLP model [Daskin M. A maximum expected covering location model: formulation, properties, and heuristic solution. Transportation Science 1983;17:48-70] was one of the first efforts to capture the stochastic nature of emergency medical services (EMS) location problems within a mixed-integer formulation. With their subsequent introduction of MALP, ReVelle and Hogan [The maximum availability location problem. Transportation Science 1989;23:192-200] offered two key advances, local vehicle busyness estimates and the α-reliability objective. While these constructs have influenced many subsequent EMS location models, they have been subjected to relatively little empirical analysis. To address this, we introduce the LR-MEXCLP, a hybrid model combining the local busyness estimates of MALP with the maximum coverage objective of MEXCLP. We then solve a series of problems with all three models and employ simulation to estimate aggregate service levels. We find that LR-MEXCLP leads to modest but consistent service gains over both MALP and MEXCLP. These results support the merits of local busyness estimates, but they also suggest that the α-reliability objective may be inappropriate when seeking to maximize aggregate system response capabilities. More generally, our research underscores the utility of (a) linking modeling assumptions and goals with real-world application contexts, and (b) employing simulation or other techniques to validate theoretical results.     

恩平市邮政局EMS市场分析与对策研究

在当代,信息资源的开发利用已成为社会进步、经济发展的重要推动力量,信息分析已经渗透到各个领域。本文以恩平市邮政局EMS业务为实例,通过对相关的营业信息进行分析、预测,针对恩平市邮政局EMS业务提出一些对策和意见。     

Is the international propagation of financial shocks non-linear?: Evidence from the ERM

This paper tests for the presence of non-linearities in the propagation of devaluation expectations among the countries that were members of the Exchange Rate Mechanism of the EMS. We show that whenever it is possible to estimate a model for financial interdependence, a full-information technique to detect such non-linearities is more efficient than the limited-information estimator proposed, in a similar context, by Rigobon (2000). This happens, in particular, when the periods of market turbulence are relatively short. Our evidence suggests that non-linearities in the propagation of devaluation expectations were a general phenomenon in the ERM. Normally the non-linearity amounts to a stronger effect in the same direction, but sometimes, as in the Dutch case, it implies a significant effect in the opposite direction: evidence of flight-to-quality.     

Cointegration, Efficiency and Forecasting in the Currency Market

Existing literature on using the cointegration approach to examine the efficiency of the foreign exchange market gives mixed results. Arguments typically focus on econometric testing techniques, with fractional cointegration being the most current one. This paper tries to look at the issue from an economic perspective. It shows that the cointegrating relationship, whether cointegrated or fractionally cointegrated, is found mainly among the currencies of the European Monetary System which are set to fluctuate within a given range. Hence, there is no inconsistency with the notion of market efficiency. Yet, exploiting such a cointegrating relationship is helpful in currency forecasting. There is some evidence that restricting the forecasting model to consist of only cointegrated currencies improves forecasting efficiency.