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检索条件"任意字段=2012 IEEE 3rd International Conference on Software Engineering and Service Science, ICSESS 2012"

共 513 条记录，以下是501-510 订阅

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REAL-TIME PERIODIC TASK SCHEDULING CONSIDERING LOAD-BALANCE IN MULTIPROCESSOR ENVIRONMENT

REAL-TIME PERIODIC TASK SCHEDULING CONSIDERING LOAD-BALANCE ...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Kai Zhang,Bing Qi,Qing Jiang,Liangrui Tang School of Electrical and Electronic engineering North China Electric Power University,Beijing 102206,China

As distributed real-time control system is widely used,multiprocessor real-time tasks scheduling becomes the most important research *** of real-time tasks in multiprocessor environment consists of task allocation stage(scheduling in task level) and task scheduling stage(scheduling in process level).A scheduling algorithm considering load-balance of real-time periodic tasks in multiprocessor environment is proposed in this *** task allocation stage,the tasks are sorted by the ascending order of their loads *** each time allocation,we sort the available processors by the descending order of their current loads and then through a mapping strategy assign tasks in turn to corresponding available processors in order to make the loads assigned to each processor balanced as much as *** task scheduling stage,we take EDF(Earliest-Deadline First) algorithm to schedule tasks in single *** simulation results show that the algorithm proposed in this paper has good and stable load-balance performance.

关键词： Multiprocessor Real-time scheduling Load-balance Task allocation EDF scheduling

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A MODEL-BASED COLLABORATIVE FILTERING METHOD FOR BOUNDED SUPPORT DATA

A MODEL-BASED COLLABORATIVE FILTERING METHOD FOR BOUNDED SUP...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Arne Leijon KTH-Royal Institute of Technology School of Electrical Engineering Sound and Image Processing Lab.StockholmSweden

Collaborative filtering（CF） is an important technique used in some recommendation *** task of CF is to estimate the persons’ preferences（e.g.,ratings） or to predict the preferences for the future,based on some already known persons’ *** general,the model-based CF performs better than the memory-based CF,especially for highly sparse *** this paper,we present a new model-based CF method for bounded support data,which takes into account the facts that the ratings are usually in a limited interval.A nonnegative matrix factorization（NMF） model is applied to investigate and learn the patterns hidden in the observed data *** rating value is assumed to be beta distributed and we assign the gamma prior to the parameters in a beta distribution for the purpose of Bayesian *** variation inference framework and some lower bound approximations,an analytically tractable solution can be obtained for the proposed NMF *** comparing with several existing low-rank matrix approximation methods,the good performance of the proposed method is demonstrated.

关键词： Collaborative filtering Bounded support data Nonnegative matrix factorization Variational inference Extended factorized approximation Beta distribution Gamma distribution

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PRIMARY STUDY ON RETURN FLOW OF THE CENTRAL WAKE AREA OF HORIZONTAL AXIS WIND TURBINE

PRIMARY STUDY ON RETURN FLOW OF THE CENTRAL WAKE AREA OF HOR...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Yuntao Liu 1,Zhiying Gao 1,2,Xueqing Dong 1,2,Zhentao Yang 1,Zheng Chang 1,Yunzhi Li 1,Zhiguang Wang 1 1 College of Energy and Power engineering,Inner Mongolia University of Technology,Hohhot 010051,China 2 Inner Mongolia Key Laboratory of Renewable Energy,Hohhot 010051,China

Through applying PIV(Particle Image Velocimetry) test on center wake of the horizontal-axis wind turbine in low-speed blow down wind tunnel and reveal the regularities of distribution of air flow passing the blades at relative velocity under the design wind *** the same wind speed,with the increase of tipspeed ratio the influence region of backflow decreases;Meanwhile at the same tip-speed ratio,with the increase of wind speed the influence region of backflow decreases;In a certain range,with the increase of X/R axial velocity decrease,with the increase of Y/R radial velocity increase;The backflow and the air flow passing the blades collect in certain areas and form a clear dividing boundary.

关键词： Horizontal axis wind turbine The central wake PIV

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NOISE SOURCE IDENTIFICATION TEST OF FAN ON BEAMFORMIN

NOISE SOURCE IDENTIFICATION TEST OF FAN ON BEAMFORMIN

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2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Yuntao Liu 1,Zhiying Gao 1,2,Zheng Chang 1,Zhentao Yang 1,Yunzhi Li 1,Zhiguang Wang 1 1 College of Energy and Power engineering,Inner Mongolia University of Technology,Hohhot 010051,China 2 Inner Mongolia Key Laboratory of Renewable Energy,Hohhot 010051,China

In order to solve the fan noise problems,it was applied noise sources identification and analyses system with 60-channel microphone array,which can carry out the measurement of full-field sound pressure of the fan and reconstruct the sound pressure distribution of full-field sound pressure at different rotate speed in corresponding *** analyzing the experimental results,it was found that the maximum sound pressure level of the fan corresponding to mid-frequency of band is 1 KHz;the maximum sound pressure level of the fan were located at centre when it was at different rotational speed,and the pressure level of noise source decreases with the increase of r/R;and the optimal measuring distance for noise sources identification of the fan is 1.1m.

关键词： Fan Beamforming Noise source

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A DATASET FOR SCENE CLASSIFICATION BASED ON CAMERA METADATA

A DATASET FOR SCENE CLASSIFICATION BASED ON CAMERA METADATA

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2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Kaili Zhao 1,Can Cao 1,Honggang Zhang 1,Yizhe Song 2 1 Pattern Recognition and Intelligent System Laboratory,Beijing University of Posts and Telecommunications,Beijing 100876,China 2 School of Electronic engineering and Computer science,Queen Mary,University of London,UK

In this paper,we introduce a new dataset for scene classification based on camera *** classify the most common scenes that have been researched much *** dataset consists of 12 scene *** category contains 500 to 2000 *** images are high resolution such as 2000x2000 *** images in the dataset are original,namely,each image brings with a camera metadata(EXIF).Various types,metadata cues of photos,strict definitions among scenes are characteristic factors that make this dataset a very challenging testbed for photo *** supply the scene photos together with scene labeling,as well as the EXIF information extraction via methodology,and we apply the dataset into sementic scene classification up to now.

关键词： Scene classification Camera metadata EXIF

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RESEARCH OF DOMAIN NAME MAPPED IP-ADDRESS DISTRIBUTION ON THE INTERNET

RESEARCH OF DOMAIN NAME MAPPED IP-ADDRESS DISTRIBUTION ON TH...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Cuicui Wang Weimin Li Fang Liu Zhenming Lei Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication engineering Beijing University of Posts and Telecommunications Beijing 100876 China

As the explosion of the Internet traffic,many web sites deploy more servers to support high request rates to web *** Domain Name System（DNS） servers dispatch the client requests among the web servers through the domain name to IP-address mapping mechanism and load balancing ***,DNS traffic analysis has important implications for our research on web server IP-address distribution of the *** this paper,we designed and implemented DTQS system（DNS Traffic Query System） which is used to analyze DNS *** on the statistical results of the system,this paper presents the distribution of websites servers scale *** further,according to the mapping IP-address variation of some domain names,we classify the domain names of which mapping IP-address changed into two categories:CINDN（Consistent-IP-Number Domain Name） and VINDN（Variable-IP-Number Domain Name） and study their mapping IP-address variation laws respectively.

关键词： DNS traffic analysis Domain name system IP-address distribution Load balancing

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FACIAL EXPRESSION RECOGNITION VIA GABOR WAVELET AND STRUCTURED SPARSE REPRESENTATION

FACIAL EXPRESSION RECOGNITION VIA GABOR WAVELET AND STRUCTUR...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Ting Chen 1,Fei Su 2,3 1 School of Computer science,2 School of Information and Communication engineering,3 Beijing Key Laboratory of Network System and Network Culture,Beijing University of Posts and Telecommunications,Beijing 100876,China

Automatically facial expression recognition(FER) has become more and more important today,making machine understand human's emotion by expression having various potential applications,especially in the field of human machine interaction(HCI).But FER still remains a challenge problem in computer vision as the subtleness of facial expression is difficult to capture and the robustness of the recognition in various situation is also hard to *** this paper,a Gabor wavelet and structured sparse representation based classification(SSRC) are proposed aiming to solve the FER *** Gabor wavelet filter is used to extract the subtle facial expression,and the structured sparse representation based classification(SSRC) is used for classifying the test images *** sparse representation based classification(SRC),the SSRC explicitly takes structure of the dictionary into account for a better *** results show the better performance of our proposed method compared with other traditional methods,especially more robust in case of facing corruption or occlusion.

关键词： Facial expression recognition Gabor wavelet Structured sparse representation

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ANALYSIS OF INTERNET FLOW GRAPH WITH HIGHDEGREE NODES BASED ON COMPLEX NETWORK THEORY

ANALYSIS OF INTERNET FLOW GRAPH WITH HIGHDEGREE NODES BASED ...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Xinyu Zhang,Ke Yu,Xiaofei Wu,Sixi Su School of Information & Communication engineering,Beijing University of Posts & Telecommun,Beijing 100876,China

In recent years,with the number of users of Internet increasing,user behavior on Internet becomes more and more *** on Internet traffic are helpful for both analyzing user behavior and managing the *** our paper,based on practical traffic data,we construct Internet flow *** high-degree nodes play a dominant role in the evolution of graphs,we concentrate on degree-related characteristics of the graph with high-degree nodes from the perspective of complex *** mainly focus on five applications,i.e.P2P Download,P2P Stream,HTTP,Video Stream and Instant Messaging,and find that the high-degree nodes of P2P Download and P2P Stream prefer connecting either high-degree nodes or low-degree nodes,but few of them connect both highdegree nodes and low-degree nodes averagely.

关键词： Internet traffic Degree distribution Complex network.

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COOPERATIVE USER RELAYING ASSISTED LOAD BALANCING SCHEME FOR OFDMA BASED CELLULAR NETWORKS

COOPERATIVE USER RELAYING ASSISTED LOAD BALANCING SCHEME FOR...

引用

2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Kok Keong Chai School of Electronic Engineering and Computer Science Queen Mary University of LondonLondonUnited Kingdom

Load balancing is one of the radio resource management functionalities for tackling the hotspot problem caused by bursty and unevenly distributed traffic. In the conventional handover based load balancing schemes, the shifted cell edge users will suffer Signal to Noise (SNR) degradation problem due to the poorer channel condition of the new link. In this paper, a cooperative user relaying assisted load balancing scheme is proposed to address this problem. In the proposed scheme, an edge user of a heavy-loaded hotspot cell can be handed over to a light-loaded neighbour cell by selecting an appropriate inactive user in the light-loaded cell as the user relay for cooperative transmission. The intention is to take the advantage of the cooperative diversity gain to counter act the SNR degradation. In the paper, the concept and procedures of the proposed cooperative user relay assisted load balancing scheme is presented. The theoretical analysis and simulation evaluations of the scheme are undertaken. Simulation results show that the proposed scheme can effectively balance the load between cells, improve SNR of the shifted cell edge users, enhance the system throughput and deduce the system call blocking probability.

关键词： Cooperative user relay Load balancing OFDMA Cellular networks

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A SELF-TUNING CONTROLLER FOR TRANSMISSION IMPAIRMENT ON THE OPTICAL LINKS

A SELF-TUNING CONTROLLER FOR TRANSMISSION IMPAIRMENT ON THE ...

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2012 3rd ieee international conference on Network Infrastructure and Digital Content

作者： Dongyan Zhao 1,2,Haiwei Mu 1,2,Xiuli Lv 1,2,Yongli Zhao 3,Jian Han 1,2 1 College of electronic science,Northeast Petroleum University,Daqing 163318,China 2 The University-enterprise R & D Center of Measuring and Testing Technology & Instrument and Meter engineering in Heilongjiang Province,Daqing 163318,China 3 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications,Beijing 100876,China

This paper mainly presents the controller for networked control system(NCS) with the presence of control transmission time-delay and power compensation at amplifiers *** at the characteristics of time-delay and power compensation,a NCS model with uncertain parameters was established by converting the uncertainties of time-delay and impairment of *** on the optical link model,a self-tuning fuzzy controller composed with two fuzzy controllers was *** first-level fuzzy controller was used to solve the influences of the uncertainties on the system stability effectively,and a second-level fuzzy controller was designed to adjust the quantification and the scaling factors of the first-level fuzzy controller in an on-line and adaptive power value according to the changes of inputs at the network *** results that the controller has good dynamic and effective performances for real-time power compensation at the device nodes with NCS time-delay to optical links.

关键词： OSNR Control Impairment Optical link

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