散装货船装卸过程的潜在危险

[摘 要]以散装货船装卸货的特殊性为出发点,介绍了散装货船在装卸货物过程中可能存在的潜在危险及防范措施,旨在保证散装货船装卸过程中的安全。     

ZK4型电空转辙机与ZK3-A型的比较

电空转辙机是铁路驼峰编组场主要的道岔转换设备,目前驼峰编组场使用的电空转辙机有 ZK3-A 型和 ZK4型两种机型,ZK3系列电空转辙机在八十年代初投入使用,虽经过多次改进,在使用中仍然存在一系列问题,正在逐步被 ZK4型电空转辙机所替代。     

基于Agent的空中交通流量管理系统结构研究

空中交通流量管理系统(ATFM)对于适应飞行量的不断增长、减少延误、充分利用空域和地面资源,具有战略性意义.多Agent具有实时性高、可扩充性好、自治能力强的特点,符合空中交通流量管理系统的要求.本文充分考虑到空中交通流量管理系统三级结构的特点,把那些具有自主性和智能性、并对系统有重要影响的实体用Agent来实现,基于Agent技术构建了空中交通流量管理系统的框架,详细阐述了系统工作方式及各分Agent系统的结构;将多Agent应用到空中交通流量管理系统,可有效提高系统的动态环境适应性和自治性,降低系统设计与实现的复杂性,为建设流量管理系统提供了新的思维模式.     

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本文的核心工作是建立了RBF神经网络—Monte Carlo货物吞吐量预测模型，利用大连港货物吞吐量的历史数据，对2006年-2010年以及2020年的大连港货物吞吐量进行预测。以RBF神经网络的预测为基础，利用Monte Carlo仿真方法对大连港货物吞吐量的预测结果进行可信度分析。得到了预测结果区间，以及预测结果在每个区间上出现的概率。文章证明了神经网络—Monte Carlo预测模型在吞吐量预测领域中的可行性，而且预测结果为大连建设东北亚建设航运中心提供了参考依据。     

一类供应链加盟博弈模型

供应链是一种厂商间的新型关系模式，供应链管理实质上是对这种关系的管理。只有加强对供应链关系模式的深入研究，才能根本解决供应链管理发展过程中出现的问题。 利用博弈论的相关知识，首次建立了一类供应链加盟的博弈模型，通过对模型的求解和验证，证明了模型的正确和适用性，科学地解释了供应链管理中的许多根本问题和特征。该研究为供应链及供应链管理的研究提供了一条新的思路。     

利用民航“客改货”新增运力提高我军空运保障能力

我军航空运力中大型货运机所占比例过小,货运能力严重不足,无法满足高技术条件下战时的运力需求。为实现战时军事物资、装备的快速输送,可考虑发挥民航运力的后备作用,利用民机改装后形成的新增运力来满足军运需求。改装后的货机平时依汩参与地方货运业务,军队在有必要时依法征用,进行装备物资的运输,这样的做法对于缓解军航货运的紧张局面既存在必要性,同时也具备可行性。     

货船IC法防火绝缘设计探讨

在总结所设计货船的防火绝缘经验的基础上,介绍了规范要求的各级别防火分隔种类;指出了采用IC法对货船进行防火绝缘设计时需满足的规范要求;讨论了耐火分隔舱壁或甲板上有贯穿件及开口时,为保持耐火完整性而必须采取的保护方法;以及在防火绝缘设计过程中降低成本、优化设计的方法对船舶总体及内装设计人员有较高的参考价值。     

One manufacturer's approach to improving jet transport fuel efficiency

In the face of rapidly escalating costs of aircraft fuel, since the early 1970s, the aerospace industry has embarked on a program of measures to reduce fuel consumption. This article describes an integrated set of measures which have been undertaken by Lockheed‐California to improve the fuel requirements of the Tristar, a wide‐bodied three engine medium to long range aircraft. Measures include operational changes, improvements to maintenance practices, long term hardware modifications and technological advances.     

Traffic models for goods,service and business movements to manufacturing establishments

This paper is concerned with a problem area of increasing interest, namely the traffic characteristics of specific generators located on non‐residential land use. It concentrates on the problem of modelling traffic generation for goods, service and business movements at the manufacturing establishment. Firstly the contributions of earlier researchers are reviewed in the context of factors which have been considered important. Then a further study conducted by the author in Sheffield and in Manchester, England, is described. This study considers more rigorously than hitherto the questions of similarities in trip rates over different manufacturing activities and geographical areas, and of the choice of explanatory variables. Comparison of regressions is used to formalize indications of similarities in trip rates, and analysis of variance for choosing the most satisfactory explanatory variables. The study provides evidence of similarity in trip rates over seven different manufacturing activities and two geographical areas. It also shows distinctions between different non‐work traffic types in the extent of similarities in trip rates over different manufacturing activities and in explanatory variables for traffic generation relationships. Regarding the latter it is concluded that it is not possible to model accurately such traffic movements on the basis of explanatory variables which are normally available. Instead trip rates should be expressed in simple mathematical terms and should be based on large data populations. The study also makes contributions on peak flow factors for the actual design of facilities of manufacturing establishments. These findings and others are discussed in the context of the work of earlier researchers. Finally conclusions are drawn and guidance offered for future work into this problem.     

中国世界级“强港”建设分析与探讨

港口作为海陆运输的枢纽,客货运输的中转站,其地位与作用日益突出。文章通过分析中国现代港口发展,解读中国现代港口特征,探讨中国建设世界级＂强港＂的发展方向,对中国建设世界级＂强港＂提出几点建议,希望对中国港口建设与发展有所帮助。