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ORACLE公司自86年推出版本5开始,系统具有分布数据库处理功能.88年推出版本6,ORACLE RDBMS(V6.0)可带事务处理选项(TPO),提高了事务处理的速度.1992年推出了版本7,在ORACLE RDBMS中可带过程数据库选项(procedural database option)和并行服务器选项(parallel server option),称为ORACLE7数据库管理系统,它释放了开放的关系型系统的真正潜力。ORACLE7的协同开发环境提供了新一代集成的软件生命周期开发环境
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21世纪是知识经济的时代,组织和利用知识信息的有力武器——数据库将继续得到广泛应用。数据库(Database,即DB)是存储在一起的相关数据的集合,是存储数据的“仓库”。其名词源于20世纪50年代,美国为战争的需要,把各种情报案中在一起,存入计算机。60年代数据库帮助设计了阿波罗登月火箭,推动了数据库技术的产生。70年代,数据库蓬勃发展,网状系统和层次系统占领了市场,并且关系数据库理论也日趋完善。80年代起,关系数据库产品已相当成熟,后来有了分布式数据库系统(Distributed Databa
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Overview of Control and Grid Synchronization for
Distributed Power Generation Systems
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随机数的产生算法介绍:任意分布的伪随机变量的抽样,方法包括直接抽样方法,变换抽样法,舍选抽样法等。-Random number generation algorithm: the arbitrarily distributed pseudo-random variable sampling methods including direct sampling method, transform sampling method- rejection sampling method.
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file for generating inter-arrival and service time in a banking system
generation of uniformly distributed random numbers- file for generating inter-arrival and service time in a banking system
generation of uniformly distributed random numb
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file for generating inter-arrival and service time in a banking system
generation of uniformly distributed random numbers- file for generating inter-arrival and service time in a banking system
generation of uniformly distributed random numb
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本书从。NET的基础出发,在适当的地方加以延伸和拓展,使之更贴近企业开发。书中系统地讲解了。NET企业开发的多个层面,主要知识点包括:表单知识、.NET运行机制、Visual Studio 2008技巧、ASP.NET服务器控件的使用、SQL注入防范、单元测试、三层架构、报表、数据加密/解密、GDI+、ADO.NET、分布式开发、AJAX开发及静态页面生成技术、高性能ASP.NET应用程序开发等,在最后一章以一个实际项目来演示如何将本书所讲的知识点应用到实际项目开发中-Book from. NE
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thesis about coalitional game theory for distributed cooperation in next generation wireless networks 2010
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异常压力是含油气盆地普遍存在的一种现象。据Hunt (1990)统计,世界上已经发现
有180个超压盆地,其中有160多个为富油气盆地。异常压力可发生在浅至地下数百米,或
超过六七千米的深度中;可存在于碎屑岩、厚层蒸发岩和碳酸盐岩地层中;可分布于区域范
围或极有限的范围;可分布于前寒武系一更新世地层。异常压力与生、运、储、盖、保等油
气成藏要素之间关系密切,异常压力过渡带常常是油气聚集的有利场所。在油气生成方面,
异常高压可降低烃源岩的成熟度,延缓烃源岩热演化的进程,当地层压
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Paper Abstract – An adaptive control of Distributed Generation (DG)
to provide predictable active power output at the primary
distribution substation is described. Often, distribution networks
accommodate renewable energy different energy sourc
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This paper presents a modified adaptive Kalman filter
for sensorless current control of a three-phase inverter-based distributed
generation system. Measurement and digital signal processor
delays have been compensated by using a modified Kalman
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overview of Distributed Generation
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Optimum Sizing of Distributed Generation and Storage Capacity in Smart Households
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A combination of genetic algorithm and particle swarm optimization for optimal
DG location and sizing in distribution systems
Distributed generation (DG) sources are becoming more prominent in distribution systems due to the
incremental dema
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考虑分布式电源的配电网电压控制新方法。针对含分布式电源的配电网电压越限问题,提出了一种基于灵敏度分析进行综合调节分布式电源出力和投切电容器组的电压控制新方法。当配电网出现节点电压越限,通过计算各个节点的注入无功功率对电压的灵敏度,以系统节点电压偏移最小为目标函数,采用和声算法,综合确定调节分布式电源出力大小和投切电容器组大小,并对分布式电源是否参与电压控制的控制效果和是否按电压灵敏度调节电压的控制效果进行了比较。-New Method of Voltage Control Considering
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Load Flow based Approach for Optimum Allocation of Distributed Generation Units in the Distribution
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presentation distributed generation
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Distributed generation placement and its optimal allocation
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Different types of distributed generation (DG) are
broadly used and optimally placed in a distribution system to
improve its performance. Since the network configuration affects
the system operational conditions, the network reconfiguration
a
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Distributed generation: A review o f factors that can contribute most
to achieve a scenario of DG units embedded in the new distribution
network s
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