发展水利通信事业 服务海河水利现代化

1992年9月海委成立了通讯调度中心,2002年7月更名为海委通讯中心。其职责是：负责海河流域水利通信网的规划、可行性研究等前期工作、流域内水利通信业务的协调和海委系统通信业务的行业管理。流域内委属通信干线及海委机关的通信网络的建设、运行维护和管理等工作。     

永淀河泛区及小清河分洪区警报系统简介

永淀河泛区及小清河分洪区地处京、津、冀三省市,地理位置十分重要。为了确保京、津两市的防洪安全,为了泛区内及分洪区内人民生命财产的安全。因此,水电部于1985年10月批准建设永淀河泛区及小清河分洪区警报系统。由南京水利水文自动化研究所负责系统设计、国外设备的验收、安装、调试。南京所和海委共同组织工程实施。鉴于该系统处于京、     

Simulation studies of tungsten impurity behaviors during neon impurity seeding with tungsten bundled charge state model using SOLPS-ITER on EAST

An investigation into tungsten (W) impurity behaviors with the update of the EAST lower W divertor for H-mode has been carried out using SOLPS-ITER. This work aims to study the effect of external neon (Ne) impurity seeding on W impurity sputtering with the bundled charge state model. As the Ne seeding rate increases, plasma parameters, W concentration (), and eroded W flux () at both targets are compared and analyzed between the highly resolved bundled model 'jett' and the full W charge state model. The results indicate that 'jett' can produce divertor behaviors essentially in agreement with the full W charge state model. The bundled scheme with high resolution in low W charge states (20+) has no obvious effect on the Ne impurity distribution and thus little effect on W sputtering by Ne. Meanwhile, parametric scans of radial particle and thermal transport diffusivities (and) in the SOL are simulated using the 'jett' bundled model. The results indicate that the transport diffusivity variations have significant influences on the divertor parameters, especially for W impurity sputtering.     

海河流域水利专用通信网发展策略探讨

介绍了海河流域水利专用通信网发展状况,初步探讨了今后水利专用通信网的建设和发展方向,提出了利用公共通信资源和自建相结合的方式组建水利专用通信网的发展模式和在立足于服务水利的前提下参与电信运营服务的社会化经营的发展策略.     

降雨对KU波段卫星通信的影响及对策

随着科学技术的发展 ,我国的通信事有了长足的发展 ,不仅有短波、超短波、集群、微波、卫星、CTMA、无线寻呼等通信系统 ,而且还有光纤、无线接入和程控交换机联网等通信系统 ,同时还建设了许多适合各自行业特点的专业通信系统。我国的无线电管理机构对使用频率进行了统一规划