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全国篮球赛三项得分往来成功比率优势类型及胜负规律探讨
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作者 黄松华 《湖北体育科技》 1994年第3期26-29,共4页
本文通过观察、统计、分析和研究,揭示了比赛中2分球,3分球和罚球往来成功比率优势呈现的类型及胜负规律;不同条件球队的得分往来成功比率优势类型、主类型及胜负规律。
关键词 得分往来成功比率 优势类型 胜负规律
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论朝鲜族知识女性成功比率低的现象
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作者 孙英善 《黑龙江民族丛刊》 CSSCI 北大核心 1996年第2期35-36,共2页
论朝鲜族知识女性成功比率低的现象孙英善在当前中国的改革年代中,女性的位置、作用、出路如何,是引人广泛关注的社会问题。随着社会的发展,女性地位不断提高,致使她们在社会、家庭中逐渐占有举足轻重的地位。中国女性社会地位提高... 论朝鲜族知识女性成功比率低的现象孙英善在当前中国的改革年代中,女性的位置、作用、出路如何,是引人广泛关注的社会问题。随着社会的发展,女性地位不断提高,致使她们在社会、家庭中逐渐占有举足轻重的地位。中国女性社会地位提高之快,是名列世界前茅的,与中国的社... 展开更多
关键词 朝鲜族 知识女性 成功比率
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P2P流媒体直播分布式缓存替换算法研究 被引量:2
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作者 李润知 郭纯一 范明 《计算机工程与设计》 CSCD 北大核心 2011年第1期58-61,74,共5页
P2P流媒体直播系统中分布式节点缓存区别于传统的Client/Server缓存结构,节点的实时同步给缓存管理提出较大挑战。分析了分布式缓存空间利用率的决定因素,通过节点成功请求比率,缓存的fresh度及数据分片点击率3个指标来评估节点缓存空... P2P流媒体直播系统中分布式节点缓存区别于传统的Client/Server缓存结构,节点的实时同步给缓存管理提出较大挑战。分析了分布式缓存空间利用率的决定因素,通过节点成功请求比率,缓存的fresh度及数据分片点击率3个指标来评估节点缓存空间利用率,提出了频度限制与改进的LRU相结合的K-Degree&LRU2缓存替换算法。仿真实验结果表明,该算法较传统的FIFO、LRU算法具有更高的执行效率。 展开更多
关键词 P2P流媒体 数据驱动 缓存替换 分布式 成功请求比率
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Reliability testing and reliability analysis of the over-load protective relay 被引量:4
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作者 ZHAO Jing-ying CHEN Hong-jian +2 位作者 LIU Guo-jin ZHANG Yong WU Pin-hua 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第3期475-480,共6页
The over-load protective relay is widely used directly affects the safe running of a motor. The reliability for motor protection. The reliability of the over-load protective relay testing and reliability analysis of t... The over-load protective relay is widely used directly affects the safe running of a motor. The reliability for motor protection. The reliability of the over-load protective relay testing and reliability analysis of the over-load protective relay is an important way to improve the reliability of products. In this paper, the reliability test method of the over-load protective relay is studied, and the reliability tests of the typical products are carried out on a reliability tester developed by authors. In terms of the testing results, the reliability analysis is finished. The failure reasons are found and the measures are put forward to improve the reliability of the products. 展开更多
关键词 Over-load protective relay Protective success analysis ratio Sampling and checking plan Reliability testing Reliability analysis
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A NOVEL PAPR REDUCTION WITH TRELLIS SHAPING FOR NC-OFDM IN COGNITIVE RADIO 被引量:1
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作者 Shao Fei Yu Yong +1 位作者 Zhang Shijie Sun Dechun 《Journal of Electronics(China)》 2009年第3期296-302,共7页
In this paper, trellis shaping is applied to reducing the Peak-to-Average Power Ratio(PAPR) of NC-OFDM signals due to the fact that the total number of active subcarriers and their locations might change continuously ... In this paper, trellis shaping is applied to reducing the Peak-to-Average Power Ratio(PAPR) of NC-OFDM signals due to the fact that the total number of active subcarriers and their locations might change continuously in a dynamic spectrum access network.A new branch metric of trellis shaping is proposed which reduces the PAPR of OFDM signals through minimizing the variance of the power by VA decoder.The overall performance considerably depends on the type of signal mapping, and therefore a new type of 64QAM mapping method is designed.Simulation results show that this scheme significantly reduces the PAPR.Finally, a significant phenomenon is demonstrated that the PAPR of NC-OFDM signals in which the deactivated carriers is distributed in the Bernoulli distribution has better performance than that of OFDM signals. 展开更多
关键词 Peak-to-Average Power Ratio (PAPR) NC-OFDM Trellis shaping Cognitive radio
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A Blind Adaptive Jamming Canceller Using Antenna Array for GPS Receiver
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作者 孟大伟 Huang Shuhua Feng Zhenming 《High Technology Letters》 EI CAS 2009年第1期85-87,共3页
Traditional beamformers need to know the incident angle of the desired signal leading while its abili-ty to handle interference is limited.In this paper,the constrained steer vector of linearly constrained min-imum-va... Traditional beamformers need to know the incident angle of the desired signal leading while its abili-ty to handle interference is limited.In this paper,the constrained steer vector of linearly constrained min-imum-variance(LCMV)beamformer is modified to make sidelobe null to direction of powerful jammer.Inaddition,the state-space concept is used to describe the anti-jammer filter,and Kalman filter algorithm isdeduced by building the observation model and measurement equation.The new method is more efficient oncomputation and more robust to survive environment with large scale variation in interference strength.Fi-nally,simulation results shows that the new approach can form the null with its depth in proportion to powerin direction of jammer,and has steady convergence process.The novel method can effectively improve thesignal-to-jammer-plus-noise power ratio(SJNR)of GPS signals to make the correlation peak easy to track. 展开更多
关键词 GPS ANTI-JAMMING linearly constrained minimum-variance LCMV) Antenna Array Kalman Filter
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Generating W State with Qubits of Superconducting Quantum Interference Devices via Adiabatic Passage
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作者 叶晓芳 陈美锋 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第5期868-870,共3页
A scheme is proposed to generate W state with qubits of superconducting quantum interference devices (SQUIDs), based on adiabatic passage along dark state. Taking advantages of adiabatic passage, the scheme is very ... A scheme is proposed to generate W state with qubits of superconducting quantum interference devices (SQUIDs), based on adiabatic passage along dark state. Taking advantages of adiabatic passage, the scheme is very robust against decoherence, and it does not need to control the classical field and the interaction time accurately. Because of the achievable strong coupling between SQUID qubits and cavity, W state can be generated with high successful probability. 展开更多
关键词 SQUID qubits W state adiabatic passage cavity QED
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中国专利授权的影响因素分析 被引量:6
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作者 邱均平 余凡 《情报科学》 CSSCI 北大核心 2013年第2期3-6,共4页
以中国专利数据库为数据源,利用RostWebSpider、Excel工具和Java程序处理源数据,运用文献信息统计分析法研究了专利分类号数、专利发明人数与已授权专利数的地区分布、机构分布和总体分布,同时还研究了专利分类号数、专利发明人数与专... 以中国专利数据库为数据源,利用RostWebSpider、Excel工具和Java程序处理源数据,运用文献信息统计分析法研究了专利分类号数、专利发明人数与已授权专利数的地区分布、机构分布和总体分布,同时还研究了专利分类号数、专利发明人数与专利成功比率的分布情况。专利分类号数为2时申请的专利最容易被授权。专利发明人数越多,申请专利时越容易被授权。 展开更多
关键词 文献信息统计分析法 中国专利数据库 专利成功比率
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Deterministic Joint Remote Preparation of an Arbitrary Two-Qubit State Using the Cluster State
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作者 王明明 陈秀波 杨义先 《Communications in Theoretical Physics》 SCIE CAS CSCD 2013年第5期568-572,共5页
Recently, deterministic joint remote state preparation (JRSP) schemes have been proposed to achieve 100% success probability. In this paper, we propose a new version of deterministic JRSP scheme of an arbitrary two-qu... Recently, deterministic joint remote state preparation (JRSP) schemes have been proposed to achieve 100% success probability. In this paper, we propose a new version of deterministic JRSP scheme of an arbitrary two-qubit state by using the six-qubit cluster state as shared quantum resource. Compared with previous schemes, our scheme has high efficiency since less quantum resource is required, some additional unitary operations and measurements are unnecessary. We point out that the existing two types of deterministic JRSP schemes based on GHZ states and EPR pairs are equivalent. 展开更多
关键词 joint remote state preparation cluster state unit success probability
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