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检索条件"任意字段=2012 International Conference on Computer Science and Service System, CSSS 2012"

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Antenna Selection for MIMO Nonorthogonal Multiple Access systems

Antenna Selection for MIMO Nonorthogonal Multiple Access Sys...

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作者： Yu, Yuehua Chen, He Li, Yonghui Ding, Zhiguo Song, Lingyang Vucetic, Branka School of Electrical and Information Engineering University of Sydney SydneyNSW2006 Australia School of Computing and Communications Lancaster University LancasterLA1 4YW United Kingdom School of Electrical Engineering and Computer Science Peking University Beijing100871 China

This paper considers the antenna selection (AS) problem for a multiple-input multiple-output nonorthogonal multiple access system. In particular, we develop new computationally efficient AS algorithms for two commonly used scenarios: NOMA with fixed power allocation (F-NOMA) and NOMA with cognitive radio-inspired power allocation (CR-NOMA). For the F-NOMA scenario, a new max-max-max AS (A3-AS) scheme is first proposed to maximize the system sum-rate. This is achieved by selecting one antenna at the base station (BS) and corresponding best receive antenna at each user that maximizes the channel gain of the resulting strong user. To improve the user fairness, a new max-min-max AS (AIA-AS) scheme is subsequently developed, in which we jointly select one transmit antenna at BS and corresponding best receive antennas at users to maximize the channel gain of the resulting weak user. For the CR-NOMA scenario, we propose another new AS algorithm, termed maximum-channel-gain-based antenna selection (MCG-AS), to maximize the achievable rate of the secondary user, under the condition that the primary user's quality-of-service requirement is satisfied. The asymptotic closed-form expressions of the average sum-rate for A3-AS and AIA-AS and that of the average rate of the secondary user for MCG-AS are derived. Numerical results demonstrate that the AIA-AS provides better user fairness, whereas the A3-AS achieves a near-optimal sum-rate in F-NOMA systems. For the CR-NOMA scenario, MCG-AS achieves a near-optimal performance in a wide signal-to-noise-ratio regime. Furthermore, all the proposed AS algorithms yield a significant computational complexity reduction, compared to exhaustive search-based counterparts. © 1967-2012 IEEE.

关键词： Cognitive radio

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An Improved Inter-Cluster Multi-hop LEACH Protocol Oriented Reliable Transmission in WSNs 3

An Improved Inter-Cluster Multi-hop LEACH Protocol Oriented ...

引用

3rd IEEE international conference on computer and Communications (ICCC)

作者： Chen, Hui Wang, Feng Zhang, Mu Anhui Univ Sci & Technol Coll Comp Sci & Engn Huainan Peoples R China

ISBN: (纸本)9781509063529

In view of the problems of the degradation of data transmission reliability and the loss of important data caused by electromagnetic interference, environmental noise and node failure in wireless sensor networks (WSNs), an improved LEACH protocol based on the differentiated service model is presented. In this protocol, the gathered data are divided into different transmission levels according to the importance of the data;when the data are forwarded by the source cluster head node, the communication links between the cluster head node and the sink node are increased with the increase of the level of data;for the data with high level, the several redundant links with multi-hops are used to ensure packets to reach the sink node, and for the data with low level, the transmission strategy with low energy consumption is adopted to transmit data packets so as to realize the balance between the energy consumption and transmission reliability in WSNs. The simulation results show that this scheme can obviously improve the transmission reliability of the important data and additional network overhead is not obvious owing to the low occurrence probability of a monitoring event. Compared to the other three protocols, this protocol has better performance, which is very suitable for the application with the requirement for high reliability in data transmission in WSNs.

关键词： WSN LEACH differentiated service reliable transmission multilink

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computer Simulation of Maize Yield by Fisher Integral Model Based on Meteorological Factors

Computer Simulation of Maize Yield by Fisher Integral Model ...

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2018 3rd international conference on computer science and Information Engineering(ICCSIE 2018)

作者： Seng Shanshan Zhang Yongen Yu Wen Xu Shiwei Agricultural Information Institute Chinese Academy of Agricultural Key Laboratory of Agri-information Service Technology Ministry of Agriculture Beijing Engineering Research Center for Agricultural Monitoring and Early Warning

In this paper,we use maize yield and meteorological data during the period of 1980-2015 in the Yilan County,Heilongjiang Province to study the impact of meteorological factors(rainfall,sunshine hours,temperature) on maize *** on the computer simulation,Fisher integral model and Chebyshev orthogonal polynomials were used to analyze the coefficients between meteorological factors(temperature,precipitation and sunshine hours) and the maize yield so as to establish a mathematics model between the *** the coefficients between meteorological factors and maize yield during different periods,it is discovered that meteorological factors had a great effect on maize *** fitting degree of maize yield meteorological model the maize yield can be predicted in an accurate *** provides a theoretical basis for the information management of maize production in Heilongjiang Province based on the computer *** is of great significance in providing scientific guidance for the sustainable development of Heilongjiang's corn industry.

关键词： Maize yield meteorological factors orthogonal polynomials fisher integral regression Heilongjiang

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Wireless powered cooperation-assisted mobile edge computing

Wireless powered cooperation-assisted mobile edge computing

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作者： Hu, Xiaoyan Wong, Kai-Kit Yang, Kun Department of Electronic and Electrical Engineering University College London LondonWC1E 7JE United Kingdom School of Computer Science and Electronic Engineering University of Essex ColchesterCO4 3SQ United Kingdom School of Communication Engineering University of Electronic Science and Technology of China Chengdu611731 China

This paper studies a mobile edge computing (MEC) system in which two mobile devices are energized by the wireless power transfer (WPT) from an access point (AP) and they can offload part or all of their computation-intensive latency-critical tasks to the AP connected with an MEC server or an edge cloud. This harvest-then-offload protocol operates in an optimized time-division manner. To overcome the doubly near-far effect for the farther mobile device, cooperative communications in the form of relaying via the nearer mobile device is considered for offloading. Our aim is to minimize the AP's total transmit energy subject to the constraints of the computational tasks. We illustrate that the optimization is equivalent to a min-max problem, which can be optimally solved by a two-phase method. The first phase obtains the optimal offloading decisions by solving a sum-energy-saving maximization problem for given an energy transmit power. In the second phase, the optimal minimum energy transmit power is obtained by a bisection search method. Numerical results demonstrate that the optimized MEC system utilizing cooperation has significant performance improvement over systems without cooperation. © 2002-2012 IEEE.

关键词： Energy utilization

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Economic Incentives in Virtualized Access Networks

Economic Incentives in Virtualized Access Networks

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IEEE international conference on Communications (ICC)

作者： Teixeira, Thiago Marentes, Andres Wolf, Tihnan Univ Massachusetts Amherst Dept Elect & Comp Engin Amherst MA 01003 USA Univ Los Andes Bogota Colombia

ISBN: (纸本)9781467389990

Monopolies in access networks present challenging problems for network users: providers have no economic incentives to improve service quality or reduce cost. Virtualization of the access infrastructure can enable competition between providers without the need for deploying different physical access networks. For example, municipal broadband networks are owned by local governments and can be sliced to host multiple service providers. In this work, we evaluate the economic incentives in virtualized access networks and compare them to current access networks with limited (or no) provider competition. We also consider fine-grained competition among transit providers to reflect emerging ideas on offering network connectivity and services dynamically through marketplaces. We use an agent-based simulator in a research testbed to obtain results on quality and cost trends as well as on the ability of providers to thrive in the marketplace. Our findings show that having a shared infrastructure and multiple Internet providers is beneficial for subscribers while maintaining a sustainable ecosystem. Moreover, because the risk associated with deploying infrastructure is shared, Internet providers have more incentive to innovate. Thus, our results highlight the importance of virtualizing access networks to leverage economic drivers in this environment.

关键词： Internet architecture network economics competition network service virtualized access networks

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Wind generator associated with the inertial energy storage 4

Wind generator associated with the inertial energy storage

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4th international Metrology conference 2012, CAFMET 2012

作者： Bouchafaa, F. Hamzaoui, I. Talha, A. Laboratory of Instrumentation Faculty of Electronics and Computer University of Sciences and Technology Houari Boumediene BP 32 El-Alia Bab-Ezzouar Algiers16111 Algeria

ISBN: (纸本)9781622760633

The type of decentralized production unit that is the subject of this article relates to renewable energy sources, especially wind power. The aim is firstly to propose a solution facilitating the integration of existing wind turbines and also to propose a system of energy generation based variable speed wind can participate in the management of the network. Due to the highly fluctuating and unpredictable wind, a wind alone can not make the adjustment of production. To ensure the production-consumption balance, we propose a solution consisting of a storage system type inertial (SISE), which acts as a buffer between the source and the consumer. This solution has a good dynamic performance and a good life like the wind. Simulation results from the combination of an SISE and the wind generator to increase its penetration in the network and improve its contribution to the service system in Matlab / Simulink are presented.

关键词： Wind turbines

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Collaborative social bidding decision-making mechanism of service recommendation 7

Collaborative social bidding decision-making mechanism of se...

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2017 7th international Workshop on computer science and Engineering, WCSE 2017

作者： Xia, Xiaona Yu, Jiguo Qi, Lianyong Zheng, Jianchao Zhang, Lu School of Information Science and Engineering Qufu Normal University Rizhao China

ISBN: (纸本)9789811136719

Promotion of network services and social service systems, how to recommend appropriate services to goal users becomes a key problem. This paper clusters users and services in social service system respectively, achieves social circle and service cluster models, based on, we design service recommendation mechanism with social bidding decision-making and specific implementation algorithm, constructs service recommendation process driven by demand preferences. Through the experiment, we can realize accuracy and effectiveness of decision-making, and improve the efficiency and quality of service recommendation.

关键词： Decision making

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CNN-Based Mitosis Detection for Assisting Doctors to Diagnosis

CNN-Based Mitosis Detection for Assisting Doctors to Diagnos...

引用

international conference on Modelling, Identification and Control (ICMIC)

作者： Yu Bai Jiwei Liu Jianfei Liu Zhewei Zhao Ronghu Mao The intelligent science and technology department Graduate student of University of Science and Technology Beijing China Electrical Engineering and Automation Anhui University Department of Radiation Oncology Henan Cancer Hospital Henan China

Breast cancer kills more than 500,000 people every year all over the world. The number of mitotic cells is one important indicator to evaluate breast cancer progressing, and mitotic counting is very tedious and easy to make mistake. Therefore, the development of computer-aided detection (CAD) system is important in diagnosis and treatment of breast cancer. In this paper, we propose a CAD system based on a convolutional neural network (CNN) to automatically count mitotic cells. The proposed system consists of three steps. First, a normalization process is exploited to reduce the illumination variance and noise among different individuals as well as highlight the nuclei regions, which can simplify the problem of mitotic counting. Second, an improved convolutional neural network based on LeN et-5 is established to extract features. Last, Softmax can finally determine the location of mitotic cells. Our CAD system was evaluated on the dataset provide by 2012 ICPR mitosis detection challenge, and experimental results revealed that F1 score achieved 0.884.

关键词： Feature extraction Breast cancer Image color analysis Pathology Training Deconvolution

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QoS-CITS: A simulator for service-oriented cooperative ITS of intelligent vehicles 16

QoS-CITS: A simulator for service-oriented cooperative ITS o...

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16th IEEE/ACIS international conference on computer and Information science, ICIS 2017

作者： Kailong, Zhang Min, Wang Hang, Su Ansheng, Yang De La Fortelle, Arnaud Kejian, Miao School of Computer Northwestern Polytechnical University Xi'an710072 China MINES ParisTech PSL-Research University Centre for Robotics Paris75006 France

ISBN: (纸本)9781509055074

With the emerging vehicular network and the possible diverse applications, Intelligent Transportation systems (ITS) have been evolving to Cooperative ITS (C-ITS, CITS) with connected intelligent vehicles, and the topics in this domain also raise more and more research interesting recently. However, subjecting to the immaturity of V2X communication technology and the deployment of intelligent vehicles in large scale, such studies and the corresponding verification are all challenged within current situations. Focusing on several emerging features, such as cyber-physical fusion, vehicular networking, service-carrier etc, a new simulator QoS-CITS for such service-oriented C-ITS is designed. To enhance the adaptivity, an para-reconfigurable architecture is firstly adopted, within which all reservation-based models of traffic objects, state-driven behaviors, cooperation mechanisms, and policies proposed for service-oriented C-ITS are implemented. And then, a series of experiments are conducted via employing parameters within typical scenes, and all fundamental functions of QoS-CITS are verified. With this simulator, researchers can carry out various experiments, not only classic ones but service-oriented, via setting parameters according to their study and verification requirements, and then analyze the performance with statistics data automatically recorded. © 2017 IEEE.

关键词： Intelligent vehicle highway systems

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Wireless service Prediction Algorithm in Mobile Social Environment 2

Wireless Service Prediction Algorithm in Mobile Social Envir...

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2017 IEEE 2nd international conference on Big Data Analysis（ICBDA 2017）

作者： Hui Zhang Min Wang Jiangsu Key Lab of Wireless Communications Nanjing University of Posts and Telecommunications Provincial Key Laboratory for Computer Information Processing Technology Soochow University

ISBN: (纸本)9781509036202

First,according to characteristics of mobile social environment,by using optimization models based on similarity degree and interaction degree respectively,the optimal correlated users can be selected for analyzing two main factors of a target user's behaviors(***-term habits and shortterm influences);furthermore,an adaptive update strategy based on fuzzy theory is proposed to describe the importance of two factors in real time and quantitative ***,an improved Apriori theory is introduced to predict user service behaviors accurately;particularly,a new update mechanism for Apriori sample database is built to effectively integrate the samples of optimal correlated ***,simulation results verify the effectiveness of proposed algorithm.

关键词： mobile social environment user behavior prediction fuzzy theory adaptive update strategy improved Apriori theory

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