架构在Linux平台上的无线接入Intranet方案

本文全面系统地介绍了无线接入Ｉｎｔｅｒａｎｅｔ的协议标准一无线应用协议（ＷＡＰ），并给出了一个在Ｌｉｎｕｘ平台上开发遵循ＷＡＰ协议标准的ＷＡＰ网关实现无线接入Ｉｎ－ｔｒａｎｅｔ的具体方案。     

基于IPv6的新型移动协议研究

首先介绍基于IPv6的新型位置无关移动协议LIN6，重点讨论LIN6支持节点移动通信的原理，然后讨论LIN6与Mobile IPv6的区别，最后给出对LIN6的改进建议。     

基于协议分析的状态检测防火墙

提出基于协议分析的状态检测防火墙技术,它能够根据各种应用程序的RFC和标准实现检测已知的和未知的网络攻击,大大提高了网络安全,同时它保持了状态检测防火墙的高处理速度的特性,因此它是速度和安全的高度统一体。     

IPv4 to IPv6: Challenges,solutions, and lessons

Internet Protocol (IP) addresses are a crucial resource for the functioning of the Internet. Much like a telephone number, an IP address is assigned to every network interface (router, computer, mobile telephone, server, etc.) that connects to the Internet. These addresses are currently assigned using the fourth version of the Internet Protocol, or IPv4. There are a limited number of addresses that can be assigned using IPv4 and the supply of unallocated addresses is effectively exhausted. This paper (i) identifies key facts and challenges arising from IPv4 address scarcity; (ii) outlines and analyzes potential responses to IPv4 scarcity; and (iii) concludes that a decisive transition from IPv4 to IPv6 is the most durable and effective response to the exhaustion of IPv4 addresses resulting from the growth of the global Internet and the exploding demand for IP addresses.     

China＇s adjustment of climate change policies： what lessons can be learned from the US？

From the US New Energy Plan, personnel appointment, and diplomatic activities, etc., we can see that US is now on the way to returning to the negotiation table and undertaking the leadership in addressing climate change. What US has done puts tremendous challenges on China, which emits large amount of greenhouse gas into the atmosphere. However, different from US, China is undergoing rapid development, and huge energy consumption is unavoidable. China has to make a balance between developing economy and addressing climate change. This paper focuses on the US climate change policies and its greenhouse gas emissions, and its influences on China climate change policy. China greenhouse gas emissions and relative policies are also analyzed to see what situation China is in, and what challenges that China is facing. Consequently, combing China＇s local situation, we propose several solutions for China to address climate change, i.e. moving towards a low carbon economy, struggling for emitting more, enhancing China-US cooperation, and implementing different climate change policies based on local situation. Meanwhile, the achievements that China has made are also introduced.     

Will the Biosafety Protocol hinder or protect the developing world: Learning from China’s experience

Uncertainties about the effect of Biosafety Protocol (BSP) on global agricultural trade have caused concern among those with a stake in agrifood imports and exports. The primary goal of this paper is to analyze the potential economic impacts of the BSP on both importing countries with a specific emphasis on China and exporting countries of soybean and maize. The results show that in absolute terms the BSP will require large investments internationally and will induce compliance costs. The BSP will increase the international price and domestic production in importing countries, and lower international trade and domestic production in the exporting countries. In absolute terms the impacts are large, amounting for each commodity into the tens of millions of dollars and varying largely among different scenarios. But in the percentage the impacts are small. Much smaller impacts are found in China because China has already invested in a system that provides almost all of the services that could be required by the BSP. Other developing nations may need more help; and that it will be more costly.     

AN ENVIRONMENTAL/INPUT–OUTPUT LINEAR PROGRAMMING MODEL TO REACH THE TARGETS FOR GREENHOUSE GAS EMISSIONS SET BY THE KYOTO PROTOCOL

The Kyoto Protocol contains legally binding targets for greenhouse gas (GHG) emissions for industrialized countries. The importance of this agreement and the elaboration of a climate change policy make it necessary to define and establish national policy measures and to bring into force environmental regulations that will reduce GHG emissions. Extending our knowledge of the economic-ecologic relationships that exist within the production sphere can assist in defining and implementing successful environmental policies. In this paper, an Environmental/Input–Output linear programming model is proposed. To develop the model we consider the input–output model as a linear programming problem combining two types of restrictions: environmental restrictions establishing GHG emission targets, and economic restrictions. The model shows how targets for the emissions of GHGs may be reached and can affect production activity composition.     

Buyer Liability and Voluntary Inspections in International Greenhouse Gas Emissions Trading: A Laboratory Study

This paper reports a preliminary laboratoryexperiment in which traders make investments toincrease the reliability of tradableinstruments that represent greenhouse gasemissions allowances. In one half of thesessions these investments are unobservable,while in the other half traders can invitecostless and accurate inspections that makereliability investments public. We implement abuyer liability rule, so that if emissionsreductions are unreliable (i.e., sellersdefault), the buyer of the allowances cannotredeem them to cover emissions. We find thatallowing inspections significantly increasesthe reliability investment rate and overallefficiency. Prices of uninspected allowancesusually trade at a substantial discount due tothe buyer liability rule, which provides astrong market incentive for sellers to investin reliability.     

一种提高无线环境中TCP性能的改进方案

本文针对无线信道的特点提出了一种用于提高无线环境中TCP性能的改进方案－Wireless-TCP，通过尝试对TCP的拥塞控制中时间的算法进行调整并增加Probe模块以应对无线信道中的长时间中断，保证TCP连接的存在，通过爱立信通信实验室的仿真实验验证了该改进方案的有效性。     

试析特别保障措施条款的非公正性与双重危害性

2002年8月13日,印度针对中国出口的工业用缝纫机针,启动了全球第一起针对中国的特别保障措施调查。随后,欧盟、美国等发达国家相继对中国纺织品实施特别保障措施,限制中国纺织品的出口,最近势头更加猛烈。日本、美国、欧盟、加拿大、韩国、印度等国家纷纷制定或修订了相关的国内法,以备在必要时采取特别保障措施。近期,波兰、巴西、哥伦比亚、阿根廷、南非等发展中国家也纷纷做出决定,对中国纺织品实施特别保障措施。专门针对中国产品的特别保障措施的频繁实施,已越来越显示出“团伙化”迹象,中国纺织品出口陷入四面楚歌的境地。本文就中国“入世”后遭遇的这个“阻击手”——特别保障措施条款产生的背景、不公正性、对中国及实施国的危害性等问题进行研究、探讨。