赤木文库藏琉球官话课本《广应官话》中三则清代闽琉交流史料考述

赤木文库本《广应官话》中保留了三则清代闽琉交流史料,一则是见于《历代宝案》的闽县林合兴商船杠椇清册,属于雍正十年(1732)中琉海难救助史料;另一则是雍乾时期闽中进士刘敬与和琉球人的友好交往记录;最后一则是闽地流行的《新刻官话汇解释义音注》等官话正音书的引文,属于乾嘉时期闽琉文化交流的史料。这些史料一方面说明琉球官话课本语料来源的复杂性,另一方面也体现出其在闽琉交流史研究中的特殊性。     

车辆集中润滑数字化信息管理系统

通过对车辆集中润滑系统的应用研究,开发了数字化信息管理系统.系统通过无线网络将分散的各车辆集中润滑系统进行联网,完成了对各车辆集中润滑系统的集中管理,该系统具有远程调控、实时数据监控、报表自动归档、故障自检及报警功能.将车辆集中润滑系统的管理由原有的粗放式、分散式工作模式提升到数字化、智能化、信息化阶段,对客车、公交车、商用车领域集中润滑系统的应用具有重要的意义.     

中低速磁浮信号车地通信电磁干扰研究与实现

针对北京S1线信号系统车地通信出现的电磁干扰问题,对干扰原因进行分析,确定干扰原因,并提出针对性的抑制措施,取得良好效果,保障北京S1线的平稳运行.研究方法和处理措施,为后续中低速磁浮交通的建设和维护积累经验.     

An Analysis of the Impact of the Internet on Coastal Management

The role of the Internet in coastal management practice is analyzed through the Internet's communication and information access capacity. Primary and secondary impacts of the Internet in coastal management are assessed. A broad research framework is employed, including background on the development and spread of the Internet worldwide; analysis of emerging literature on the societal impact of the Internet; limited existing research on the use of the Internet by environmental management professionals generally and coastal managers in particular; and personal experience of the authors in the development of coastal management Internet sites. This analytical framework is supplemented by the first survey of integrated coastal management (ICM) Internet websites by www.coastalmanagement.com and a case study of the Internet Center for Coastal Management (ICCM) Internet-based communication platform based at the University of Washington. The survey of ICM websites found a total of 77 websites worldwide, with a dominance of sites in English located in the developed world. Assessment of the first year of operation of the ICCM project to facilitate discussion between coastal management practitioners and students in the United States and the Philippines demonstrates the enormous potential of the Internet as a communications tool in coastal management and also reveals the many practical technological and cultural constraints of using the Internet, especially in working on a project between the developed and developing world. Three groups of scenarios of the future use of the Internet in coastal management with decreasing levels of forecast certainty, namely, "probable," and "possible," and "potential for" are presented and discussed. Finally, the potential for the Internet to fundamentally transform the practice of coastal management is analyzed. It is concluded that while such a potential exists, there remain significant research questions requiring further analysis before the full transformative potential, and the possible impacts of such a transformation on coastal management, can be fully assessed. This article aims to provide a benchmark against which such future assessments can be made.     

软件无线电技术在铁路通信中的应用

首先介绍目前先进的软件无线电技术,然后通过实际的研发项目,详细地描述此技术在铁路高速移动接入通信系统中的应用.     

利用PDQComm控件实现计算机间的数据通讯

作者介绍了如何利用Visual Basic的另一串行通讯控件PDQComm实现多协议的、大量的、快速的计算机间数据通讯(交换)的方法.     

双丝焊送丝机嵌入式通信系统前期研究

双丝MAG(熔化极活性气体保护焊)焊接的应用越来越广泛.在造船行业中,由于船台焊接作业特点决定了电焊机设备普遍使用几十米的加长控制电缆.利用嵌入式系统,研究焊接电源和送丝机之间控制信号通信系统,实现减少控制电缆的芯数,既可减少生产成本,又可减少断线故障率,提高生产质量和效率、节能降耗,具有重要的现实意义,且对于多丝焊接...     

新型多模式高速无线多媒体数传技术的研究

为解决铁路高速无线数传的安全与可靠性,研制和试用对数据、话音、图像多业务信息适配、汇接与同传的软硬平台。采用非线性码MM高密度密钥,实现"加密与纠错兼容一体化",达到破译复杂度为O(2104),纠错能力为检4纠3,正确解密概率达0 999999988,数据信息传输速率高达3Mbps～22Mbps时传输误码率优于10-10,重传率为0。为实现多模式无线数传,研制出多速率、多路、多媒体复用器,具有低速异步及高、低速同步与多速率数传功能,同步时间小于1s,开机同步可靠率达99%,设有动态图像、数据、话音、文本等四路通道,具有自适应多模式信息组合数据通道,使数字系统可实现同一平台多作业信息复用传输。数传网络接口可支持OS/2与Windows两种操作系统相互平滑转换,开发出多点互联控制软件,实现局部网随机接入。设计出"线状"、"链状"、"面状"、"点 面混合"及"树状"五种信息网型,满足铁路运输信息化及应用多媒体数据2km～120km的传输需求。     

铁通黑龙江分公司通信业务网保护方案

利用省干传输网对铁路接入网实施复用段保护,对长途电话网、互联网骨干网和铁路业务网的保护,提高了各业务网的安全性和可靠性.     

磁浮交通运行控制系统中通信子系统的分析和研究

介绍并分析了磁浮交通运行控制系统中通信子系统的功能及网络构成,就如何对关键技术进行国产化进行了研究。