基于B/S与C/S模式相结合的东港灌区信息管理系统

为实现水资源的合理配置,促进节水高效农业的发展,针对东港灌区的实际情况建立了基于B/S与C/S模式相结合的东港灌区信息管理系统,在介绍系统设计及实现的基础上,研究了系统实现的关键技术.系统运行结果表明,该系统可实现灌区管理的自动化、网络化,且操作方便快捷.     

基于Internet的电厂安全生产远程实时监控网络管理系统

文章介绍了基于Internet的电厂远程实时监控网络管理系统的设计思路和总体方案,可以实时采集电厂的安伞生产原始数据,实时监测机组运行状态,提供手机报警信息,实现远程实时监控与状态诊断.     

基于.NET的水电厂远程监控系统的研究

通过C/S与B/S两种模式优缺点的比较,本文提出了基于.NET技术及C/S与B/S混合模式的水电厂远程计算机监控系统。并实际应用于甘肃某梯级水电站的远程计算机监控系统,加强了对偏远电站的远程实时监控。     

基于B/S模式的国际贸易信息管理系统的设计与实现

根据国际贸易特点和系统建设目标,提出了基于B/S模式的信息管理系统结构模型,对系统基本功能和实现的关键技术进行了详细的阐述,与传统的B/S模式相比有突出的优势,安全稳定可靠、效率高、服务成本低、竞争力强,规避风险。     

中小型水利工程管理系统的设计与实现

针对东海县水利工程数据资料繁杂、信息更新不及时等特点,采用VB.NET为开发语言、ASP.NET为开发环境、SQL Server 2008为后台数据库,设计开发了中小型水利工程管理系统,实现了水利工程数据搜索、查询、统计等功能,可供借鉴.     

基于B/S模式的电站热经济性在线监测系统的开发

论述了基于B/S(浏览器/服务器)模式的电站热经济性能在线监测系统结构的特点和发展现状.指出与以往的C/S(客户端/服务器)结构相比的优越性.其次,论述了此在线监测系统后台数据库的设计思想-实时和历史交互式动态数据库的建立过程和意义.最后,详细论述了数据采集和纠错处理所采用的方法以及机组性能计算的热平衡法通用数学模型和该系统各个集成模块的功能;研究结果可以为提高机组的运行经济性和节能降耗提供依据和手段.     

基于C/S和B/S的电网调度作票统开发研究

电网调度操作票系统采用C/S和B/S相结合的混合模式,C/S客户端负责电网图形、基础数据和知识库维护,而应用是基于B/S客户端,主要负责开票、执行及调度操作票的管理.该系统现已成功运用于广西邕宁地区的电力系统中,实践证明该系统不仅可以减轻调度员日常工作的强度,而且还为调度员提供先进的工作手段,提高调度安全运行管理水平.     

基于Web的径流中长期预报系统

以云南电网水调高级应用软件系统为工程背景,采用面向对象的编程思想开发了B/S模式下的径流中长期预报系统.系统涉及云南电网所属的5座主力水电站及其他重要的中小水电站,采用四种常用的中长期预报模型和频率分析方法进行径流预报.系统主要功能包括预报参数率定和检验、多种预报方法间的比较分析、与历史径流过程的对比分析、基础资料添加维护与报表生成等.系统操作简便、功能强大,同时具有良好的稳定性、移植性和可扩展性.     

Locating wind farm for power and hydrogen production based on Geographic information system and multi-criteria decision making method: An application

Hydrogen generation from renewable energy resources is considered as a suitable solution to solve the problems related to the energy sector and the reduction of greenhouse gases. The aim of this study is to provide an integrated framework for identifying suitable areas for the construction of wind farms to produce hydrogen. For this purpose, a combined method of Geographic Information System (GIS) and multi-criteria decision making (MCDM) has been used to locate the power plant in Yazd province. The GIS method in the present study consisted of two parts: constraints and criteria. The constraint section included areas that were unsuitable for the construction of wind farms to produce power and hydrogen. In the present study, various aspects such as physical, economic and environmental had been considered as constraints. In the criteria section, eight different criteria from technical aspects (including average wind speed, hydrogen production potential, land slope) and economic aspects (including distance to electricity grid, distance to urban areas, distance to road, distance to railway and distance to centers of High hydrogen consumption) had been investigated. The MCDM tool had been used to weigh the criteria and identify suitable areas. Analytic Hierarchy Process (AHP) technique was used for weighting the criteria. The results of AHP weighting method showed that economic criteria had the highest importance with a value of 0.681. The most significant sub-criterion was the distance to urban areas and the least significant sub-criterion was the distance to power transmission lines. The results of GIS-MCDM analysis had shown that the most proper areas were in the southern and central sectors of Yazd province. In addition, the feasibility of hydrogen production from wind energy had shown that this province had the capacity to generate hydrogen at the rate of 53.6–128.6 tons per year.     

The study on the power management system in a fuel cell hybrid vehicle

This paper presents a model of a hybrid electric vehicle, based on a primary proton exchange membrane fuel cell (PEMFC) and an auxiliary Li-ion battery, and its dynamics and overall performance. The power voltage from the fuel cell is regulated by a DC/DC converter before integrating with the Li-ion battery, which provides energy to the drive motor. The driving force for propelling the wheels comes from a permanent magnet synchronous motor (PMSM); where the power passes through the transmission, shaft, and the differential.