舰艇通信与电子系统一体化集成技术研究

舰艇电子信息系统正在向“一体化结构”演变,舰艇电子信息系统一体化集成是国内外十分关注的重大课题。在分析舰艇电子信息系统结构演变方向基础上,重点研究舰艇通信作战使用特点,分析通信与其它电子信息系统实现一体化集成的必要性和可行性,探讨通信系统集成发展趋势、发展阶段和目标,概要分析相关的核心技术。     

球形和圆柱形结构的声辐射模态及特性分析

采用不同方法推导两种典型三维结构的声辐射模态及其辐射效率.求解方法采用单元辐射器法和基函数法,并对两种方法进行比较,阐明各自的优越性和局限性,以及相应的应用场合.对球形结构和圆柱形结构进行数值计算,并对各自特点进行分析.     

装载机液压系统的主动维护

论述了装载机在使用过程中液压系统易发生的故障,着重分析了油液污染、空气渗入和油温过高的原因,并提出了相应的主动维护对策。     

《国际燃油污染损害民事责任公约》释义及我国履约对策

<国际燃油污染损害民事责任公约>生效在即,文章在对公约主要内容释义的基础上,与<1992年油污损害民事责任公约>的相关内容进行了对比分析,提出了我国应对公约生效实施的相关对策.     

基于积分分离PID调节方法的直流发电机控制系统优化设计

现有的消磁用直流脉冲发电机控制系统采用双反馈控制方式,在此基础上对控制系统的模型进行了PID调节仿真,并针对消磁工作电流波形的特点提出了采用积分分离PID调节方法。仿真结果表明该调节方法对电流波形的控制效果最优。     

IETM技术发展综述及其特点分析

交互式电子技术手册（IETM）技术是实现现代装备综合保障信息化的关键技术。在重点介绍分析美军IETM技术发展和应用过程的基础上,总结了其发展特点,并在说明现阶段仓库管理问题的前提下,提出了应用IETM技术的总体建议。     

重力辅助导航仿真演示系统设计与实现

为了形象直观地研究重力辅助惯性导航系统,用VC＋＋和MapObjects开发了重力辅助惯性导航仿真演示系统,它实现了组合导航的计算与控制、仿真轨迹动态显示和数据处理。文章对系统开发的总体框架,实现的主要功能和部分功能的具体实现作了详细的描述。     

电子装备战备完好率改进模型

以战备完好率评估基本模型为基础,结合电子装备维修的特点,从部队装备修复流程出发,提出了包含故障件更换、故障件修理以及申领故障件在内的改进评估模型,并做了模型推导。     

Geochemical controls on distributions and speciation of As and Hg in sediments along the Gaoping (Kaoping) Estuary–Canyon system off southwestern Taiwan

Surface and box-cored sediments were collected along the Gaoping (formerly spelled Kaoping) Estuary–Canyon system and analyzed for As and Hg contents and speciation, ²¹⁰Pb-based sedimentation rates and various geochemical parameters to elucidate the mechanisms that control natural and anthropogenic inputs of As and Hg from the Gaoping (Kaoping) River (KPR). The contents of As and Hg in surface sediments ranged from 1.84 to 20.7 mg kg^− 1 and from 0.07 to 2.15 mg kg^− 1, respectively, in the estuary and canyon. The concentrations generally decreased from the lower river toward the mixing boundary and then increased toward the estuarine mouth, followed by a slight variation in the canyon. Both As and Hg concentrations correlated strongly with clay, total organic carbon (TOC), Al, Fe and Mn contents in estuarine sediments but not necessary the same cases for canyon surface sediments. The factor analysis of surface sediments shows that the first two factors, which account for 75.6% of the variance, may represent major roles of carriers (clay, Al and Fe–Mn oxides) and TOC in controlling As and Hg distributions, respectively. Accordingly, the spatial patterns of the enrichments of As (1.9–16.2) and Hg (1.8–30.8) with reference to the crust levels follow the individual element's distribution patterns, likely because of deposition variability following inputs from the river. The contents of mobile As and Hg correlated substantially with the contents of both metals that were extracted with 0.1 M HCl. In addition to the major pool in the residual fraction (65–87%), As was relatively abundant in Fe–Mn oxides/hydroxides, whereas Hg was abundant in the organic/sulfide fraction. The deposition and accumulation rates of As and Hg in the canyon clearly decreased as the depth of water increased. The depth distributions of both metals are likely controlled primarily by TOC and Fe–Mn oxides associated factors followed by a contribution from anthropogenic pollution. The metal pollution appears to have increased substantially around 1970, following the economic boom in Taiwan, suggesting that modern sediments in the Gaoping (Kaoping) Canyon were derived from the Gaoping (Kaoping) River (KPR).