贵州飞机人工增雨空地通信作业指挥系统研制与应用

为了进一步提高飞机增雨空地跟踪指挥科学作业效率,建立了集作业跟踪指挥监控通信于一体的贵州飞机人工增雨空地通信作业指挥系统。 本文简述北斗卫星导航系统特征,紧密联系贵州飞机人工增雨实时跟踪指挥作业需求,实现了贵州飞机人工增雨业务工作中飞行航线设计和申报、飞行作业时实时GPS数据收集、飞行轨迹信息实时显示和监控、催化剂播撒情况和实时作业决策指挥等功能。实践的结果表明,自2018年以来使用该系统应用于每次飞机人工增雨空地协调跟踪指挥作业,作业指挥效果较好,使得贵州飞机人工增雨工作在抵御干旱、增加水库电站蓄水、保护生态文明建设、保障脱贫攻坚成果等方面发挥重要作用。     

高速水声通信中正交频分复用技术试验研究

设计了基于正交频分复用的高速水声通信系统,并进行了湖上和海上试验研究。湖试中,在6 000 m距离下,传输速率达到7.6 kbps,误码率低于10-4;海试中,在12 km距离下,传输速率达到8.3 kbps,误码率低于10-3。试验结果表明,正交频分复用技术可以较好地克服码间干扰,有效地利用水声信道带宽,达到高速水声通信的目的。     

地面气象观测业务集成平台

详细介绍了自主开发的"气象站观测业务集成平台"。该平台是台站普遍使用的测报业务软件基础上的一个扩展平台软件,主要实现自动气象观测站的运行监控、通信链路监控、数据质量检查、重要天气提示、自动报警、业务工作流程提示、自动排班、质量报表生成、设备管理、通信质量统计等功能。综合运用3G移动通信和信息化技术,与现行的地面气象观测业务软件相配套,对于提高测报业务质量、减轻测报人员的工作强度、实现气象探测业务自动化发挥了重要作用。     

计算机网络与通信系统中浪涌保护器的选择

针对雷击可能造成的雷击电磁脉冲对计算机、通信设备等微电子设备的危害情况,对雷电的分类、通信系统和计算机网络的雷电入侵途径进行阐述和分析.介绍了雷电浪涌保护器(SPD)的类型、组成元器件及主要技术指标;重点介绍在通信和计算机网络系统中SPD的选用原则和选型计算,通过对SPD最大持续运行电压、最大放电电流的详细计算,提出参照连接器类型,按照工作电压、工作频率的要求选择正确合理SPD的方法.     

单片机与VB的串行通信

利用VB5.0中ActiveX的一个控件,实现Windows下PC与单片机的串行通信,使上位机操作界面的设计,即简单、又美观,而且控制方便。     

分布式超宽带雷达地震被困人员协同探测技术

针对震后在大面积废墟下快速准确检测与定位被困人员的需求,本论文提出了用分布式超宽带雷达探测地震被困人员的技术,主要包括对分布式超宽带雷达协同探测网络构建、超宽带雷达生命迹象探测算法、分布式雷达节点探测数据融合方法等3个方面进行研究,对多雷达干扰抑制、分布式雷达节点自定位、微弱生命迹象稳健探测、废墟穿透定位误差补偿等关键技术难题提供了设计方案,为完成分布式超宽带雷达系统的研制奠定了技术基础。     

Communicating geomorphology through International English

International English has come to dominate science publication. For both first and second language speakers, the constraints of language for communication in geomorphology are reviewed, including uncertainties with terminology, subtleties of qualification and explanation in the written presentation of arguments, and formalities in the rhetorical structuring of published papers. Distinctive qualities of style and presentation need to be recognized because, in geomorphology as generally, full qualitative meanings may pass lingua franca or second language speakers by, whilst formulaic discourse may disguise shortcomings. The alternative of language simplification for international usage may not be wholly desirable if valued functions are lost. Language is also increasingly being coupled with visual devices, pictorial and diagrammatic images and data tables, which are internationally intelligible. These can leave viewers with greater hermeneutic (text interpretation) freedom, and therefore a variety of outcomes in understanding. Mathematical treatments, with their precision and predictive utility, have great universal value and they leave readers with rather less interpretive freedom. Debate is due, both by first and by second English language geomorphologists, as to how well developing presentation styles in international English suit scientific purposes. Copyright © 2016 John Wiley & Sons, Ltd.     

Communicating landscape hydrology — the water cycle in a box

Physical models are a well‐established tool in education to strengthen hydrological understanding. They facilitate the straightforward visualization of hydrological processes and allow the communication of hydrological concepts, research and questions of general interest to the public. In order to visualize the water cycle in a landscape of postglacial sediments, in particular the subsurface part, a physical model was constructed. In two videos, (1) a detailed construction manual and (2) visualization examples of hydrological concepts and processes are presented. With our contribution, we like to encourage professionals in the field of hydrology to share methods and tools of knowledge transfer and communication of hydrological concepts. Copyright © 2016 John Wiley & Sons, Ltd.     

虚拟通信媒介模式北斗CORS跨网服务无缝切换通信模型实现

目前国内各省市北斗CORS服务系统相互独立运行,不同省服务系统账户无法通用,在一定程度上影响北斗高精度位置服务的社会化应用范围。针对此难题,本文基于移动通信技术,提出了一种虚拟通信媒介模式的CORS跨网服务无缝切换通信模型,实现了用户跨省使用北斗高精度服务的无缝切换和实时获取高精度定位数据。该方法不改变目前各省市CORS服务业务流程,且用户无需重新注册账号,即可实现在不同省市使用CORS服务的无缝切换。经测试,该方法实现跨省切换并获得高精度定位数据的平均用时为9.029 s,可应用于多省市跨网服务及国家"北斗位置服务一张网"建设。