公开(公告)号：US08650340B2

公开(公告)日：2014-02-11

申请号：US12831795

申请日：2010-07-07

申请人： Jianfeng Yan ,  Wen-Syan Li

发明人： Jianfeng Yan ,  Wen-Syan Li

IPC分类号： G06F3/00 ,  G06F5/00

CPC分类号： G06F17/30501 ,  G06F9/505 ,  G06F17/30 ,  G06F17/30445

摘要： A system may include a buffer monitor configured to monitor buffer content of a buffer being used during processing of a query workflow in which write tasks of the query workflow write data to the buffer and read tasks of the query workflow read data from the buffer, the buffer having a buffer capacity. The system may include a threshold manager configured to compare the buffer content to a low threshold and to a high threshold that are defined relative to the buffer capacity, and a speed controller configured to control a number of the write tasks relative to a number of the read tasks that are currently executing the query workflow, to thereby maintain the buffer content between the low threshold and the high threshold.

摘要翻译： 系统可以包括缓冲器监视器，其被配置为监视在查询工作流的处理期间使用的缓冲器的缓冲器内容，其中查询工作流的写入任务将数据写入缓冲器并读取查询工作流程从缓冲器读取数据， 具有缓冲器容量的缓冲器。 该系统可以包括阈值管理器，其被配置为将缓冲器内容与相对于缓冲器容量定义的低阈值和高阈值进行比较;以及速度控制器，被配置为相对于多个 读取当前执行查询工作流的任务，从而将缓冲区内容保持在低阈值和高阈值之间。

公开(公告)号：US20110191048A1

公开(公告)日：2011-08-04

申请号：US12996896

申请日：2009-09-04

申请人： Yaozhong Xin ,  Fang Li ,  Jingtao Wu ,  Hongzhu Tao ,  Jianfeng Yan ,  Gang Duan ,  Fang Tian ,  Yu Dong ,  Wei Zhang

发明人： Yaozhong Xin ,  Fang Li ,  Jingtao Wu ,  Hongzhu Tao ,  Jianfeng Yan ,  Gang Duan ,  Fang Tian ,  Yu Dong ,  Wei Zhang

IPC分类号： G06F19/00

CPC分类号： H02J3/24

摘要： A method and a system for a comprehensive analysis of low frequency oscillation. The method includes: firstly, initiating a wide area measurement system WAMS (71) to perform real-time monitoring; transmitting real-time low frequency oscillation information to a dynamic early-warning system (72) periodically; then converting the low frequency oscillation information received by the dynamic early-warning system (72) into an input file for stability calculation with small disturbance, and performing related calculation; finally, transmitting the calculated result back to the wide area measurement system WAMS (71) and a human-machine system interface for output. The system includes: the wide area measurement system WAMS (71), the dynamic early-warning system (72), a system for stability calculation with small disturbance (73) and an output system (74).

摘要翻译： 一种综合分析低频振荡的方法和系统。 该方法包括：首先启动广域测量系统WAMS（71）进行实时监控; 周期性地将实时低频振荡信息发送到动态预警系统（72）; 然后将由动态预警系统（72）接收的低频振荡信息转换成具有小干扰的用于稳定性计算的输入文件，并执行相关计算; 最后，将计算结果传送回广域测量系统WAMS（71）和人机界面进行输出。 该系统包括：广域测量系统WAMS（71），动态预警系统（72），小干扰稳定计算系统（73）和输出系统（74）。

公开(公告)号：US20110093852A1

公开(公告)日：2011-04-21

申请号：US12717694

申请日：2010-03-04

申请人： Wen-Syan Li ,  Jianfeng Yan

发明人： Wen-Syan Li ,  Jianfeng Yan

IPC分类号： G06F9/50 ,  G06F9/46

CPC分类号： G06F9/5066 ,  G06F11/3404 ,  G06F11/3419 ,  G06F2201/88 ,  G06F2209/508

摘要： A first performance measurement of an executing task may be determined, while the task is executed by a first number of nodes operating in parallel. A second performance measurement of the executing task may be determined, while the task is being executed by a second number of nodes operating in parallel. An overhead factor characterizing a change of a parallelism overhead of executing the task with nodes executing in parallel may then be calculated, relative to a change in a number of the nodes, based on the first performance measurement and the second performance measurement. Then, an optimal number of nodes to operate in parallel to continue executing the task may be determined, based on the overhead factor.

摘要翻译： 可以确定执行任务的第一性能测量，而任务由并行操作的第一数量的节点执行。 可以确定执行任务的第二性能测量，而任务正由并行操作的第二数量的节点执行。 然后可以基于第一性能测量和第二性能测量来相对于节点数量的改变来计算表征并行执行的节点执行任务的并行性开销变化的开销因素。 然后，可以基于开销因素来确定并行操作以继续执行任务的最佳数量的节点。

公开(公告)号：USD616025S1

公开(公告)日：2010-05-18

申请号：US29334008

申请日：2009-03-18

申请人： Jianfeng Yan

设计人： Jianfeng Yan