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2007年国际电子商务、工程及科学领域的分布式计算和应用学术研讨会

作者： Lin Ouyang1, Qingping Guo1, Qin Zhou2, Qiumei Pu1 1School of Computer Science and Technology, Wuhan University of Technology Wuhan, Hubei 430063 China 2Department of Electrical Engineering, Shanghai Dian Ji University Shanghai 200240 China

There is a large class of applications that produce high-frequency data continuously in 7 days per week and 24 hours per day. The traditional data processing system can’t deal with them efficiently because of the active data pushing and the passive queries. With the purpose of dealing with these data, data stream management systems (DSMS) appeared. For the geographical distribution of data streams, distributed data stream processing systems are studied recently. As an important aspect of distributed data stream management system (DDSMS), load management can balance system load incurred by unpredictable incoming data stream and inappropriate query operators’ distribution. load-shedding acts as an important role in load management of distributed data stream system. In this paper, a control-based feedback load-shedding strategy is proposed to degrade system load. Compared with previous work which concentrates on one metric factor only, it takes four metric factors, such as CPU usage ratio, memory utilization, average length of waiting data queue and data tuple delay, into account to increase system stability and to decrease the loss of query accuracy.

关键词： load-shedding Control Theory Feedback Control DDSMS

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PROPOSED LEED CREDIT FOR ELECTRICAL load shedding

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Journal of Green Building 2009年第3期4卷 121-134页

作者： Wayne Jensen Tim Wentz Bruce Fischer University of Nebraska-Lincoln 68588-5000

The cost of energy is a signifi cant percentage of the operating expense for most *** used within buildings is supplied primarily by *** for electricity used in industrial and agricultural applications is frequently leveled by shifting portions of peak loads to non-peak *** electrical loads reduces the utility’s carbon footprint and the cost of generating *** savings are commonly shared with customers through economic *** techniques can be applied to control the energy demand of buildings,with benefi ts for both the electrical utility and electricity *** paper provides an overview of electrical load-shedding techniques,outlines some of the benefi ts and problems associated with each,and discusses how some of these techniques are currently being applied to reduce the total electrical load for *** paper also proposes a LEED credit which provides an incentive for owners and tenants to incorporate one or more load-shedding systems into LEED certifi ed buildings to lower peak electrical demand.

关键词： LEED credit load-shedding peak load

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