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结构化组件创建及对象产生问题探讨 被引量:2
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作者 孟凡福 张学成 《石化技术》 CAS 2000年第2期106-108,共3页
讨论了Delphi的组件创建原理及在程序运行中对象产生的方法。
关键词 DELPHI 软件工具 组件创建 对象产生 结构化
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Top-K Query Framework in Wireless Sensor Networks for Smart Grid 被引量:2
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作者 WANG Hui GUAN Zhitao +1 位作者 YANG Tingting XU Yue 《China Communications》 SCIE CSCD 2014年第6期89-98,共10页
The smart grid has caught great attentions in recent years, which is poised to transform a centralized, producer-controlled network to a decentralized, consumer- interactive network that's supported by fine-grained m... The smart grid has caught great attentions in recent years, which is poised to transform a centralized, producer-controlled network to a decentralized, consumer- interactive network that's supported by fine-grained monitoring. Large-scale WSNs (Wireless Sensor Networks) have been considered one of the very promising technologies to support the implementation of smart grid. WSNs are applied in almost every aspect of smart grid, including power generation, power transmission, power distribution, power utilization and power dispatch, and the data query processing of 'WSNs in power grid' become an hotspot issue due to the amount of data of power grid is very large and the requirement of response time is very high. To meet the demands, top-k query processing is a good choice, which performs the cooperative query by aggregating the database objects' degree of match for each different query predicate and returning the best k matching objects. In this paper, a framework that can effectively apply top-k query to wireless sensor network in smart grid is proposed, which is based on the cluster-topology sensor network. In the new method, local indices are used to optimize the necessary query routing and process intermediate results inside the cluster to cut down the data traffic, and the hierarchical join query is executed based on the local results.Besides, top-k query results are verified by the clean-up process, and two schemes are taken to deal with the problem of node's dynamicity, which further reduce communication cost. Case studies and experimental results show that our algorithm has outperformed the current existing one with higher quality results and better efficiently. 展开更多
关键词 smart grid wireless sensornetwork top-k query framework.
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SPECIAL ISSUE: SPACE PRODUCTION AND URBAN ORDER IN CONTEMPORARY CHINA--From Object to Perspective: A Shift of Significance in Space Production and Space Criticism--The Issue of Space in Conceptualizing Contemporary Chinese Urban Construction 被引量:1
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《Social Sciences in China》 2010年第4期177-188,共12页
Physical space refers to both natural space and social space, that is, social relations. Space production includes production in space and of space. Relations between these two dimensions and between physical space pr... Physical space refers to both natural space and social space, that is, social relations. Space production includes production in space and of space. Relations between these two dimensions and between physical space production and social space production constitute two basic relations in space production. The dialectical connotation of these two basic relations manifests the truth that space production can basically be summed up as reproduction of social relations. Therefore, arguments about space production can be seen as involving a fundamental shift of importance from object to perspective. Seen in this way, there remain some errors in ideas about today's Chinese urban construction, that is, the rupture and separation of object and perspective, resulting in unnecessary risks and costs in the progress of modem Chinese ttrbanization. 展开更多
关键词 OBJECT PERSPECTIVE space production space criticism shift of importance
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The Unlikely Objects of 吃(Chi)
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作者 Zhang Ning-ning 《Fudan Journal of the Humanities and Social Sciences》 2012年第2期124-142,共19页
Drawing on cognitive linguistic theories, this study investigates the various meanings of the Chinese verb 吃(chi) and the types of objects that it takes. It is concluded that the many meanings of吃 are organized in... Drawing on cognitive linguistic theories, this study investigates the various meanings of the Chinese verb 吃(chi) and the types of objects that it takes. It is concluded that the many meanings of吃 are organized in a radial network, with the primary meaning at the center and extended meanings at the periphery and that extended meanings are derived from, and thus can be traced back to, the primary meaning. This study also suggests that the productivity of the 吃 + object construction is affected by the meaning of 吃, the interpretation of its objects, as well as social and linguistic convention. 展开更多
关键词 the object construction radial network meaning extension
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NLO QCD corrections to Bc(B*c) production around the Z pole at an e+e- collider
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作者 XuChang Zheng ChaoHsi Chang +1 位作者 TaiFu Feng Zan Pan 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2018年第3期34-46,共13页
The production of Bc and B* mesons at a Z-factory (an e+e- collider operating at energies around the Z pole) is calculated up to the next-to-leading order (NLO) QCD accuracy. The results show that the dependence... The production of Bc and B* mesons at a Z-factory (an e+e- collider operating at energies around the Z pole) is calculated up to the next-to-leading order (NLO) QCD accuracy. The results show that the dependence of the total cross sections on the renormalization scale/1 is suppressed by the corrections, and the NLO corrections enhance the total cross sections of B,. by 52% and of Bc* by 33% when the renormalization scale is taken at μ = 2mb. To observe the various behaviors of the production of the mesons Bc and Bc*, such as the differential cross section vs. the out-going angle, the forward-backward asymmetry, and the distribution vs. the energy fraction z up to NLO QCD accuracy as well as the relevant K-factor (NLO to LO) for the production, are calculated, and it is pointed out that some of the observables obtained in the present work may be used as a specific precision test of the standard model. 展开更多
关键词 Bc meson PRODUCTION Z-factory
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