基于MCF51EM256低压保护测控装置的研发

在分析低压配电监控需求的基础上,提出了基于MCF51EM256单芯片SOC的解决方案,该方案利用其片内高精度16位ADC和高速32位COLDFIRE-V1核较好地实现了保护、测量、控制、管理和通讯功能,从而经济高效地满足了低压测控装置的完整需求,具有较高的参考价值.     

通信运营商智能管道与流量经营策略浅析

文章从产业发展环境和运营商面临的挑战进行分析,解读了智能管道应运而生的背景及智能管道的内涵,并通过借鉴国外运营商在智能管道方面的应用实践,提出运营商在智能管道运营和建设上紧密耦合的思路——流量经营,重点分析了流量经营的策略,提出智能管道体系化的模式和明确的可操作的步骤。     

双树寺电站电气化县改造项目设计优化及调试运行对策

为消除双树寺电站水工建筑病险隐患,解决机电设备老化、发展进入瓶颈的问题,通过相关参数的优化,减少弃水,增大流量;在装机容量新确定为1600k W时,选择混流式机组;并对压力管道设计、水轮机选型设计、水轮机吸出高度确定、安装高程设计等进行总体优化;调试运行过程中,针对导水叶密封不严、轴瓦温度过高、水轮机出力不足、发电机振荡和失步问题,研究补救措施和解决技术方案。技改后,原有的病险隐患消除,效益显著,电站实现了农村水电安全生产标准化建设目标,有效保护了生态环境,推进了绿色小水电建设发展进程。     

Boolean operations on rasterized shapes represented by chain codes using space filling curves

This paper introduces a new algorithm for Boolean operations on rasterized geometric shapes that are represented with chain codes. The algorithm works in three steps. Firstly, the chain code symbols are transformed in the Hilbert space, where the overlaid chain code symbols are recognised. After that, a suitable starting cell is determined. Finally, the walk-about through the sequence of the initial chain code symbols is performed to obtain the sequence of chain code symbols representing the shape of the required Boolean operation. The algorithm is demonstrated on Freeman chain code in four directions. The time and space complexity of the proposed algorithm is linear, which was proven theoretically and confirmed by experiments.     

锦屏一级水电站运行期谷幅变形特性与影响因素分析

通过对锦屏一级水电站运行期跨江段谷幅历年变形值进行比较分析,总结运行期谷幅的变形规律和左岸边坡的变形收敛情况;采用逐步回归分析方法,分析运行期边坡谷幅变形的影响因素,分析库岸岩体变形与库水位、气温及其他作用因子的相关性,总结运行期左岸变形的时空分布规律与特点;通过各种观测手段与谷幅变形进行对比分析,对谷幅观测的可靠性进行验证,论证谷幅成果的可靠性和真实性。     

Overview of underground coal gasification operations at Chinchilla,Australia

Underground coal gasification (UCG) is a process which converts deep, un-mineable or difficult to mine coal resources into syngas which can then be converted into valuable end products such as electric power, liquid fuels, synthetic natural gas and chemicals. This paper provides a summary of the UCG operations conducted at the Chinchilla Demonstration Facility in Australia, focusing on gasifiers constructed using directional drilling. A number of the experiences and key lessons learned from operating multiple underground gasifiers over several years at the facility are described. Implications for the implementation in commercial projects using UCG are also discussed. Finally, the potential of UCG as a method for producing syngas from deep coal is discussed and some of the challenges and opportunities are summarized.     

旁路开关用CYA8G大功率液压弹簧操动机构试制

笔者介绍LW□-1100型支柱式双断口高压交流旁路开关用CYA8G大功率液压弹簧操动机构的设计及试制,说明在设计及试制过程中旁路开关及其操动机构与普通断路器及其操动机构依据的标准不同,从而导致设计思想及设计基准不同。差别主要体现在操作循环和对合闸动作及特性的要求上,根据要求的特点,采用了反向操作旁路开关的方法,技术性能达到了设计时的预想要求,试验结果符合标准和产品技术规范的要求。     

基于泥沙冲淤数值模拟的水库调度方案研究

以东台子水库为研究对象,基于一维不饱和全沙数值模型,研究蓄洪运用方案、蓄洪排沙运行方案、分阶段蓄洪运用方案、蓄清排浑运用方案等四种水库调度方式下的泥沙淤积情况,力图在兴利防洪的基础上尽量利用弃水排沙,保持有效库容。对不同运行年限的淤积量、水库库容变化和排沙比等要素的模拟研究表明,分阶段蓄洪运用或蓄清排浑运用方案更有利于保持有效库容,对延长水库使用寿命具有一定作用,是较优的水库排沙优化调度方案。     

GIS在运营商运维体系中的应用思考

从电信运营商运维的现状出发,深入分析了GIS在电信运维中的应用技术,从GIS在运维中的应用范围、应用特点和对运维效率的提升等角度,对基于GIS的新型运维体系建设进行了探讨。