基于TCP/UDP的计算机通讯系统实现

通过利用VisualBasic6.0所提供的WinSock控件,在TCP/UDP协议上设计一个应用程序,就可以连接两台计算机实现数据通讯。文章介绍了TCP/UDP协议的原理,阐明了该系统的实现方法,探索了在客户方和服务方之间建立一条面向连接的虚电路的方法或是直接建立无连接的不可靠的UDP链路来完成数据传送的实现过程。     

氢化物发生-原子荧光光谱法测定痕量硒

研究了氢化物发生-原子荧光光谱法测定土壤和水样品中的痕量硒,系统地考察了HCl浓度、KBH4浓度的影响;确定了最佳测定条件;共存元素的影响及干扰的消除,硒的回收率为95%～102%,硒的检出限为0.18ng/mL,RSD小于4%。本法用于测定标准土壤和水样品中的硒,结果与标准值吻合。     

国外港口物流的发展与启示

比较了世界港口物流的发展特点,分析了我国港口物流的现状及其问题,提出了进一步发展我国港口的建议。     

我国港机CAD的应用与发展

港口装卸机械产品计算机辅助设计简称港机ＣＡＤ，本文介绍了港机ＣＡＤ１５年来发展的历程和取得的成绩，指出了港机ＣＡＤ今后的研究方向与课题。     

厦门港口物流园区建设研究

港口物流园区的建设，是发展现代物流的重要基础。港口经济发展越快。城市经济也发展越快。本文把港口物流园区的建设同东渡一象屿物流园区这一典型的港口物流园区的实际结合在一起．探讨了港口物流园区建设中的几个问题。包括物流目区的发展定位，物流园区的选址，物流园区的信息平台建设。最后提出了厦门港口物流园区的发展建议。     

The Effect of Risk Characteristics on the Willingness to Pay for Mortality Risk Reductions from Electric Power Generation

The objective of this study is to estimate willingness to pay (WTP) for the reduction of mortality risks caused by fossil fuel (natural gas, coal and oil) versus nuclear electric power generation systems and to examine the influence of risk characteristics involved with electric power generation on WTP. A choice experiment was conducted to achieve these objectives. The attributes for nuclear risks in the experiment included the probability of disasters and the expected losses if a disaster occurs. We find evidence of (i) a baseline effect (where WTP is sensitive to hypothetical versus actual baseline expected mortality); (ii) a ‘labeling effect,’ where, surprisingly, the term ‘nuclear’ has no effect on WTP, but the term ‘fossil-fueled power generation’ results in lower WTP; and (iii) disaster aversion, meaning that people focus on the conditional loss from a nuclear disaster, not the probability. We also find that the WTP for reducing deaths from a nuclear disaster is about 60 times the WTP for routine reducing fossil-fuel generation-related deaths.     

港口城市发展物流园区的探讨

阐述了港口城市发展物流园区的必要性。探讨了发展物流园区的规划、建设、政策扶持等问题，并对物流园区的发展提出了建议。     

基于全球供应链管理模式下的港口物流

分析了港口物流进入全球供应链管理时代的特征，比较了世界港口物流的发展特点，对我国港口物流进一步发展提出了建议。     

The trade-off between fixed vehicle costs and time-dependent arrival penalties in a routing problem

This paper introduces the vehicle routing problem with soft time windows (VRPSTW) in which problem definition differs from ones previously defined in literature. Branch-and-price approach is employed, resulting in a set partitioning master problem and its new subproblem. Novel techniques are consequently developed to solve this new subproblem. Experimental results report the comparisons of these solution techniques under the branch-and-price framework. The VRPSTW solutions have further been compared to the state-of-the-art literature, signifying the superiority of the VRPSTW on this issue.