嵌入式船舶数据记录仪监测系统设计与实现

以PC/104嵌入式工控机与PC机所组成的局域网为基础,在VC环境下,有效利用CSocket类和SQL数据库,开发基于TCP/IP协议、客户端/服务器模式的专门记录船舶装置长期运行且无人值守环境下的监测系统,完整、准确地记录船舶航行各装置工况。系统具有实时数据采集、远程数据传输、数据监测、数据查询等功能,并在文件传输过程中采用混沌加密算法保证数据信息安全。经过实际调试与运行,该记录仪运行稳定,实时性好,安全性高。     

30000DWT多用途重吊船的开发与研究

本文论述了某航运公司的30000DWT多用途重吊船的开发与设计。船型设计既借鉴了其它航运公司同类型船的优秀设计，满足了公司的业务需求。这类型船将提高船队的竞争能力。     

大断面隧道分部开挖引起地表沉降的随机介质预测方法研究

大断面隧道在不良地质地段常常采用分部开挖方法，各分部依次开挖，相互作用，地表沉降预测较为困难。应用随机介质理论，首先推导出任意单元开挖引起的地表沉降公式，然后将直角坐标系转换到局部极坐标系下进行积分计算，由此推导出任意一段圆弧收缩引起的地表沉降公式，通过圆弧叠加最终得到大断面隧道分部开挖引起的地表沉降预测公式。该方法应用于国内第一条三车道大断面海底公路隧道厦门翔安隧道陆域全强风化地段分部开挖引起的地表沉降预测，与实测数据对比，效果较好。     

数控回转头冲床自动编程系统

介绍了《数控回转头冲床自动编程系统》的功能和设计特点。它利用中Ｗｉｎｄｏｗｓ９５作为系统工作平台，直接利用产品设计时零件在计算机内的图形信息，采用人机交互方式进行数控编程，此系统适用于数控回转头冲床的自动编程，它是板金计算机辅助设计与制造（ＣＡＤ／ＣＡＭ）开发的关键。     

武汉动车段三级修架车方案研究

介绍了动车组三级修整体架车的目的和必要性,移动式和固定式两种目前典型架车方式各自优缺点及在国内外应用现状,针对武汉动车段动车组车型类别、架车作业量以及未来发展等方面统筹考虑,提出了三级修架车具体布置方案.对三级修库设备配置进行了详细阐述并说明设计思路,对设计中需注意的固定式架车机地坑防水、排水要求等重要事项一并说明,最后简要给出三级修整体架车方式选择的推荐意见及结论.     

Face recognition via adaptive image combination

Dimension reduction and manifold learning are the two most popular feature extraction methods. The two methods focus on spatial locality as a guiding principle to find a low-dimensional basis for describing high-dimensional data, but no bases or features are more spatially localized than the original image pixels. So, adaptive image combination is presented to represent a class by a combined sample. The combined sample is a linear combination of original samples in the same class. Adaptive image combination (AIC) find the best combination coefficients by minimizing the intrapersonal distance and maximizing the interpersonal distance. Experimental results show that AIC is effective.     

锁闭检查器接点电气绝缘特性的改进措施

在现场使用过程中,锁闭检查器(包括VCC和VPM)表示部分存在绝缘电阻低的问题。通过更换接点材料和对原接点材料进行绝缘处理并结合12个周期交变湿热实验数据分析,提出2种提高道岔锁闭器接点系统绝缘性能的方案。     

浅谈深港双方港口的合作与发展

1 香港港口现状及规划 香港是全世界最大的集装箱港,是著名的国际航运中心.香港与全世界主要国家和地区的约460个港口有航运往来,航线覆盖范围广,共有20个核心班轮航线,有密集的中近洋航线及中国沿海和内河喂给航线.香港港区水陆域面积约60平方公里,共有各类客货泊位约300余个,其中5万吨级以上集装箱专用泊位19个,码头集装箱通过能力约1 000万TEU.1997年,全港货物吞吐量1.74亿吨,其中集装箱吞吐量为1 456万TEU,高居世界之冠,比中国沿海全部港口的集装箱吞吐量还高出300万TEU.港口的发展极大地促进了香港经济特别是贸易和金融业的发展.目前,香港是全世界第七大贸易体系,是全世界三大金融中心之一.全香港生产总值(GDP)约1.4万亿港元,人均GDP约22万港元,成为全世界经济最繁荣的地区之一.     

Existence of self-financing and Pareto-improving congestion pricing: Impact of value of time distribution

This paper considers a static congestion pricing model in which travelers select a mode from either, driving on highway or taking public transit, to minimize a combination of travel time, operating cost and toll. The focus is to examine how travelers’ value of time (VOT), which is continuously distributed in a population, affects the existence of a pricing-refunding scheme that is both self-financing (i.e. requiring no external subsidy) and Pareto-improving (i.e. reducing system travel time while making nobody worse off). A condition that insures the existence of a self-financing and Pareto-improving (SFPI) toll scheme is derived. Our derivation reveals that the toll authority can select a proper SFPI scheme to distribute the benefits from congestion pricing through a credit-based pricing scheme. Under mild assumptions, we prove that an SFPI toll always exists for concave VOT functions, of which the linear function corresponding to the uniform distribution is a special case. Existence conditions are also established for a class of rational functions. These results can be used to analyze more realistic VOT distributions such as log-normal distribution. A useful implication of our analysis is that the existence of an SFPI scheme is not guaranteed for general functional forms. Thus, external subsidies may be required to ensure Pareto-improving, even if policy-makers are willing to return all toll revenues to road users.     

朔黄线换装ZYJ7外锁闭道岔转辙设备调试探讨

介绍朔黄线在换装ZYJ7外锁闭道岔转辙设备调试中把好线下电机和外锁设备安装关,确保道岔工、电设备几何尺寸达标;采用模拟电路试验方法,把好线下调试、试验关,确保室内配线的正确;把好上线调试关,确保转辙设备上线后联锁关系正确。