检索结果-内蒙古大学图书馆

IEEE Conference on Vehicular technology (VTC)

作者： Yanping Yang Wei Chen Ou Li Qingwen Liu Lajos Hanzo National Digital Switching System Engineering and Technological R&D Center Zhengzhou China Department of Electronic Engineering Tsinghua University Beijing China Department of Computer Science and Technology Tongji University Shanghai China School of Electronics and Computer Science University of Southampton UK

ISBN: (纸本)9781509016990

As a promising technique, cooperative relaying has attracted more and more attention from academia and industry recently. In this paper, we investigate the scheme of decode-and-Forward Two-way relaying (dF-TWr) relying on a cross-layer design, which combines adaptive Network-coded Modulation (NCM) at the physical layer and truncated Automatic repeat reQuest (ArQ) at the data link layer. The relay node utilizes Network-Coded Quadrature amplitude modulation (NC-QAM) where NCM imposes only a modest signal-to-noise ratio (SNr) degradation on the single-link QAM performance. Additionally, we derive the achievable spectral efficiency in closed-form for transmission over rayleigh fading channels. It is shown that this combination of adaptive NC-QAM and truncated ArQ substantially improves the system's throughput compared to the schemes operating without ArQ.

关键词： Automatic repeat request Peer-to-peer computing Physical layer Adaptive systems Quadrature amplitude modulation Protocols

来源：评论

学校读者我要写书评

暂无评论

Low latency mesh-based hierarchical network-on-chip structure

Low latency mesh-based hierarchical network-on-chip structur...

引用

2015 5th International Workshop on Computer Science and engineering: Information Processing and Control engineering, WCSE 2015-IPCE

作者： Jian, Gang Han, Guo-dong Zhou, Yu-Han National Digital Switching System Engineering and Technological R and D Center Zhengzhou450002 China

With the integration of cores increasing, on chip network (NoC) latency and throughput get worse in traditional structures. This paper proposed a novel low latency hierarchical mesh-based network-on-chip (PHNoC) structure which uses three parameters to describe hierarchical topology for the size changing design, and three types of base clusters to construct multilevel structure. Experimental results demonstrated that the proposed structure had lower latency and higher throughput than traditional 2d mesh and conventional hierarchical NoC in different size systems, and the larger size the better performance it improved.

关键词： Network-on-chip

来源：评论

学校读者我要写书评

暂无评论

Secure virtual network embedding to mitigate the risk of covert channel attacks

Secure virtual network embedding to mitigate the risk of cov...

引用

IEEE Conference on Computer Communications Workshops, INFOCOM Wksps

作者： Zhiming Wang Jiangxing Wu Zehua Guo Guozhen Cheng Hongchao Hu National Digital Switching System Engineering & Technology Research Center Zhengzhou P.R. China School of Electronics and Information Northwestern Polytechnical University Xi'an P.R. China

ISBN: (纸本)9781467399562

Network virtualization is a double-edged sword that facilitates network innovation but may cause information leakage between virtual nodes coexisting on the same substrate node via covert channels. This paper represents the first attempt to consider risk-tolerant coexistence in virtual network embedding. We propose a secure virtual network embedding scheme to mitigate the risk of covert channel attacks. Simulation results show that our scheme improves the percentage of secure virtual nodes by 40%.

关键词： Security Substrates Error analysis Virtualization Computers Cloud computing Simulation

来源：评论

学校读者我要写书评

暂无评论

A crf-based method for ddos attack detection 4th

A crf-based method for ddos attack detection

引用

4th International Conference on Computer engineering and Networks, CENet2014

作者： Wang, Yu Jiang, Hong Liu, Zonghai Chen, Shiwen National Digital Switching System Engineering and Technological R and D Center Zhengzhou450002 China

ISBN: (纸本)9783319111032

For the low accuracy of detection and high false-positive rate (FPr) problems in the traditional ddoS attack detection methods, the method based on conditional random fields (CrF) is introduced. The CrF-based model could make full use of the multi-feature fusion together, while it does not demand the characteristics that are independent strictly. The IP flow quintuple entropy conception is put forward as the detection multi-feature vector, which is named as the IPE including the quintuple entropy of the header part of the packets. Our experiments revealed that the multi-feature vector IPE runs well and the CrF-based model detecting method outperforms the other machine learning (ML) methods such as k-nearest neighbor (KNN), support vector machine (SVM), etc. The value of IPE leaps obviously when the ddoS attacks happened under the dArPA 2000 dataset. Simultaneously, the CrF-based method has a better detection performance (more than 90%) and lower FPr (less than 3%), as well as a strong ability of antibackground- noise and good robustness under TFN2K attacking dataset. © Springer International Publishing Switzerland 2015.

关键词： Entropy

来源：评论

学校读者我要写书评

暂无评论

ENErGY-EFFICIENT rESOUrCE ALLOCATION FOr MULTI-PAIr MASSIVE MIMO rELAYING NETWOrKS WITH ZErO-FOrCING rELAY PrECOdING

ENERGY-EFFICIENT RESOURCE ALLOCATION FOR MULTI-PAIR MASSIVE ...

引用

International Symposium on Intelligent Signal Processing and Communication systems

作者： Yi Wang Shaochuan Yang Songwei Zhang Yuhan Wang Ying Hu Chunguo Li rui Zhao School of Electronics and Communication Engineering Zhengzhou University of Aeronautics Zhengzhou China China National Digital Switching System Engineering & Technological R&D Center Zhengzhou China International Education College Henan University Kaifeng China School of Information Science and Engineering Southeast University Nanjing China Institute of Electronics and Information Jiangsu University of Science and Technology Zhenjiang China College of Information Science and Engineering Huaqiao University Xiamen China

In this paper, we investigate a MIMO relaying network with massive antennas for serving multi-pair single-antenna users, where zero-forcing (ZF) precoding is explored at the relay. Our aim is to maximize the energy efficiency (EE) by jointly optimizing the transmit power at the source-nodes and the relay, and the number of relay antennas. To solve the EE optimization problem, a lower bound of the involved spectral efficiency (SE) is derived with analytical expression. Since the original fractional optimization problem is non-convex, we transform the objective function into an equivalent parametric subtractive form by using the properties of fractional programming. Then, an iterative algorithm is developed relying on the partial convexity of the subtractive cost function, where the analytical solutions are deduced. Finally, the effectiveness and convergence behavior of our proposed scheme are verified through the numerical results.

关键词： Massive MIMO relay Zero-forcing precoding Energy-efficient

来源：评论

学校读者我要写书评

暂无评论

Information diffusion model based on k-core for social networks 15

Information diffusion model based on k-core for social netwo...

引用

7th International Conference on Internet Multimedia Computing and Service, ICIMCS 2015

作者： dingjiu, Yu Yu, Zhao China National Digital Switching System Engineering and Technological R and D Center NDSC Zhengzhou China

ISBN: (纸本)9781450335287

How to promote information diffusion models accuracy poses challenges to social networks. We propose information diffusion model based on k-core for social networks (IMK). On the basis of the compactness and centricity of k-core, the process of information flow is mapped to the phases of accepting and spreading. The average accepting ratio of nodes in given k-cores is stead of the single node accepting ration, and then the numbers of accepting k-core is computed based on the connection between k-cores. The propagation is integrated by the scheme of controlled-release factor, and the parameters of IMK are adaptive according to feedback. Experiments results show that IMK model the patterns of information diffusion properly and improve the prediction accuracy. © 2015 ACM.

关键词： diffusion

来源：评论

学校读者我要写书评

暂无评论

Construction mechanism for service path over reconfigurable service-centric network

引用

Tongxin Xuebao/Journal on Communications 2016年 37卷 147-155页

作者： Zhao, dan Wen, Feng Xu, Xin Wang, Peng Chen, Bo China National Digital Switching System Engineering & Technological R&D Center Zhengzhou450002 China Jiangnan Institute of Computing Technology Wuxi214000 China

In order to enhance the flexible and intelligent network's service ability, a novel architecture called reconfigurable service-centric network (reSCNet) was proposed which decomposed traditional network capabilities and services into fine-grained network functional unit. Then based on service routing matrix algorithm to orchestrate and deploy atomic service flexibly, a service path was built which possess smaller cost, lower time delay, higher degree of load balance and higher reliability. Finally, the performance of service routing matrix algorithm was evaluated on the innovation experiment platform NetFPGA-10G. The simulation results show that the algorithm has a better performance and can customize an optimal service path for users while meet the specific functions and performance constraints. © 2016, Editorial Board of Journal on Communications. All right reserved.

关键词： reconfigurable architectures

来源：评论

学校读者我要写书评

暂无评论

Class incremental ELM and application for image recognition

International Journal of Signal Processing, Image Processing...

引用

International Journal of Signal Processing, Image Processing and Pattern recognition 2016年第9期9卷 279-290页

作者： Tao, Wei Xin-Sheng, Ji China National Digital Switching System Engineering & Technological R & D Center Zhengzhou CityHenan Province450002 China Computer College Henan institute of engineering Zhengzhou CityHenan Province451191 China

In image recognition field, the fact is that the trained image classifier can not recognize the images, whose class type is not the same as the training data. To resolve this problem, a new image classifier is proposed, which is based on the class incremental extreme learning machine. The new classifier can recognize the normal images well, label them with new labels, and update itself with the new labeled data. Tested on the real-world daily activity data set, the results show that our algorithm performs well. © 2016 SErSC.

关键词： Image recognition

来源：评论

学校读者我要写书评

暂无评论

A fast and accurate algorithm of subspace spectrum peak search based on bisection method 4th

A fast and accurate algorithm of subspace spectrum peak sear...

引用

4th International Conference on Computer engineering and Networks, CENet2014

作者： Wang, Yu Jiang, Hong Li, donghai National Digital Switching System Engineering and Technological R and D Center Zhengzhou450002 China Huanghe Science and Technology Institute Zhengzhou450063 China

ISBN: (纸本)9783319111032

The orthogonality of signal subspace and noise subspace could be exploited to achieve a super-resolution direction of arrival (dOA) estimation. In the implementation processing, the computation complexity of peak searching is considerably large, which affects processing in real time. In this paper, we utilize the bisection method to search the spatial spectrum peak. The proposed algorithm can attain fast process speed, high precision, and strong adaptability. Firstly, we use equal interval to compute space spectrum coarsely. Then we apply the continuous bisection method to search the real peak finely. It can quickly and infinitely approach the position of the true peak. Finally, we introduce the principles and steps of the new algorithm and analyze the performance. © Springer International Publishing Switzerland 2015.

关键词： direction of arrival

来源：评论

学校读者我要写书评

暂无评论

An approach to classify visual semantic based on visual encoding with the convolutional neural network

An approach to classify visual semantic based on visual enco...

引用

International Conference on Fuzzy systems and Knowledge discovery (FSKd)

作者： Zaizhou Zheng Haibing Bu Wenjie He Li Tong Bin Yan Linyuan Wang National Digital Switching System Engineering & Technology R&D Center Zhengzhou China

ISBN: (纸本)9781467376839

Visual encoding models and visual decoding models are all used for revealing the relationship of external visual stimuli and brain activities. On the view of the goal, visual encoding and decoding are opposite, but they are also complementary. With further researching, we could not use a simple decoding model to excavate more complex information. The combination of visual encoding model and decoding model is becoming a trend of visual research. This paper has built a visual encoding model based on a convolutional neural network and has proposed an approach to select features based on the visual encoding model. The results show that our predicted voxels are similar to the selected real voxels, the correlation coefficients of them are pretty high. On the other hand, the classification results are better than those of t-value method and principal feature analysis (PFA) method. Our approach provides a reference to the combination of visual encoding and decoding models.

关键词： Visualization Encoding Semantics Correlation coefficient Biological neural networks Brain models

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：