汽车滚装码头设计特点

结合上海港外高桥港区六期汽车滚装码头设计,就汽车滚装码头面高程确定、装卸工艺布置模式、堆场排水设计及港区照明防雷设计的相关特点进行论述,说明汽车滚装码头设计有其自身的特点,其设计要求与其他货种码头的要求不同,需要根据各个港区的实际情况区别对待。     

Market dynamics and indirect network effects in electric vehicle diffusion

The diffusion of electric vehicles (EVs) is studied in a two-sided market framework consisting of EVs on the one side and EV charging stations (EVCSs) on the other. A sequential game is introduced as a model for the interactions between an EVCS investor and EV consumers. A consumer chooses to purchase an EV or a conventional gasoline alternative based on the upfront costs of purchase, the future operating costs, and the availability of charging stations. The investor, on the other hand, maximizes his profit by deciding whether to build charging facilities at a set of potential EVCS sites or to defer his investments.The solution of the sequential game characterizes the EV-EVCS market equilibrium. The market solution is compared with that of a social planner who invests in EVCSs with the goal of maximizing the social welfare. It is shown that the market solution underinvests EVCSs, leading to slower EV diffusion. The effects of subsidies for EV purchase and EVCSs are also considered.     

反舰导弹对编队目标最佳瞄准点的确定方法

对编队目标的全捕概率研究是中远程反舰导弹目标选择和火力分配的重要环节,以单目标的现在指示点作为瞄准点无法保证获得全目标最优捕捉概率,论文在分析典型目标编队队形结构和其机动以及导弹自控终点散布的基础上,结合末制导雷达搜索模型,通过试验仿真的方法确定给定约束条件下的最佳瞄准点及攻击航向,并分析了影响全捕概率的主要因素及其之间的关系.     

高速铁路接触网防雷设计研究

分析了国内外接触网防雷技术方案,对接触网雷害进行了分类,探讨了避雷线、避雷器、接地、绝缘子选型等防雷关键技术,从差异化防雷角度出发为不同地区的接触网防雷接地设计提出了建议。     

25Hz轨道电路高频开关电源的研究

随着既有铁路提高列车速度，对铁路设备提出了更高要求。本文针对目前既有铁路广泛使用的工频轨道电源，提出一种利用高频开关电源技术研制的新型25Hz轨道电源进行替代。该电源采用正弦脉宽调制技术（SPWM）、功率因数校正技术（PFC）、全桥逆变技术和短路保护技术，将110V交流输出和220V交流输出整合在一个模块中。详细论述了该电源模块的组成和工作原理，解决了工程应用中的负载短路引起的模块输出中断、雷电保护及牵引电流干扰等关键问题，使模块的可靠性得到较大提高。模块内嵌入了监控单元，具有告警、通信、数据采集、控制等功能，使远程监控成为现实，减轻了工作量。该电源模块体积小、重量轻、效率高、智能化程度高，实际使用证明，该电源可以替代目前的工频电源。     

铁路信号设备的雷电综合防护体系

随着铁路信号设备向数字化、网络化、智能化和综合化方向发展，大规模集成电路和低耐压器件在信号设备中大量使用，雷电所带来的危害越来越大，对雷电的防护已成为保证铁路安全运输的重要问题。综合雷电防护方法是在全面考虑雷电损坏信号设备的各种可能途径的基础上，综合采用外部防护、屏蔽、等电位连接、接地、合理布线、使用浪涌保护器等多种方法解决这个问题的有效措施。     

Spatial and Temporal Variability in Shipping Traffic Off San Francisco,California

Shipping traffic poses a worldwide threat to many large whale species. Spatially explicit risk assessments are increasingly being used as a tool to minimize ship-strike risk. These assessments often use static representations of shipping patterns. We used Automatic Identification System data to quantify variability in cargo shipping traffic entering and exiting San Francisco Bay, which contains some of the busiest ports in the United States, at three temporal resolutions: (1) before and after implementation of the California Air Resources Board's Ocean-Going Vessels Fuel Rule, (2) among seasons, and (3) day versus night. We used the nonparametric Mood's Median test to compare median daily distance traveled because the data were not normally distributed and the variance was not homogeneous. Our analyses show that shipping traffic off San Francisco is dynamic at both interannual and daily temporal resolutions, but that traffic was fairly consistent among the seasons considered. Our analyses emphasize the importance of economic and regulatory drivers on interannual shipping traffic patterns. Shipping traffic is expected to continue to change off the U.S. West Coast and to increase globally. These changes in shipping traffic could have implications for the risk of ships striking whales and should be included in risk assessments.     

基于模糊综合评判的联合火力打击多目标火力分配优化分析

对多目标打击的火力分配是火力计划的重要组成部分，运用模糊综合评判的方法，对多目标条件下炮兵火力分配建立了模型，并举例进行验证。     

变电站综合自动化装置的防雷保护

从几起雷害事故研究中发现了几个值得注意的现象,分析了其发生的原因,提出了应采取的相应措施,并介绍了获得的教训和收获,可供同行参考.     

铁路变配电所的雷击危害及防雷技术分析

通过分析铁路变配电所雷击的危害,介绍了防雷技术的应用情况,以达到减轻雷击对铁路变配电所的危害的目的.