检索结果-内蒙古大学图书馆

Position and Velocity Estimation Using TOA and FOA Based on Lagrange Programming Neural Network

Journal of Physics: Conference Series 2019年第1期1284卷

作者： C Jia J Yin Z Yang L Zhang National Digital Switching System Engineering and Technology Research Center Zhengzhou 450002 P.R. China Zhengzhou Information Science and Technology Institute Zhengzhou Henan 450002 P.R. China

This paper addresses the problem of estimating the position and velocity of a moving source utilizing the time-of-arrival (TOA) and frequency-of-arrival (FOA) measurements. Since the concerned estimation problem is highly non-linear and non-convex, we propose to utilize a novel neural circuit, namely the Lagrange programming neural network (LPNN) framework, to solve this problem. LPNN equips the abilities of fast convergence and the robustness of resisting high noise level, and thus these two advantages have drawn much attention for it recently. Since LPNN is able to solve the optimization problem with constraint, we first reformulate the original non-linear and non-convex maximum likelihood (ML) problem by introducing additional variables and constraints, and thus a neural network is built up based on the LPNN framework. Subsequently, the convergence and stability of the proposed neural network is mathematically proved and then verified by the results of numerical experiments. different from the conventional numerical algorithms, the analog neural network can be utilized to fulfil the task of real-time calculation, especially when there are limited computation resources in some applications. The simulation results demonstrate that the proposed LPNN model equips the basic properties of convergence and stability, and also show the superior localization accuracy of the proposed method than other numerical algorithms.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Carrier Beating Impairment of PAM, CAP and dMT in Multicore Fiber Based IM/dd systems

Carrier Beating Impairment of PAM, CAP and DMT in Multicore ...

引用

Asia Communications and Photonics Conference

作者： Lin Gan Jiajun Zhou Ming Tang rui Lin Songnian Fu Chen Yang Weijun Tong deming Liu Wuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System (NGIA) School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 China Dept. of Electrical Engineering at Chalmers Tekniska Högskola Sweden State Key Laboratory of Optical Fiber and Cable Manufacture Technology Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC). R&D Center

Crosstalk will introduce significant carrier beating impairment in multicore fiber based IM/dd links. For PAM, CAP and dMT, experimental results show CAP format has the highest tolerance to the carrier beating impairm... 详细信息

ISBN: (纸本)9781943580705

关键词： Frequency modulation Laser sources Multicore fibers Optical signals Signal processing Variable optical attenuators

来源：评论

学校读者我要写书评

暂无评论

New Steganalysis Methods Based on Camera Source Identification and Outlier detection

New Steganalysis Methods Based on Camera Source Identificati...

引用

2017 IEEE 第2届先进信息技术,电子与自动化控制国际会议(IAEAC 2017)

作者： Yunda Wu Tao Zhang China National Digital Switching System Engineering &Technological R&D Center

In order to solve the cover source mismatch problem, a new blind universal image steganalysis algorithm combining camera source identification and outlier detection is proposed in this paper. Cover im

ISBN: (纸本)9781467389808

关键词： Steganalysis Cover source mismatch Camera source identification Outlier detection outliers images Imagery (Psychotherapy) Image BATCH TESTING Cameras

来源：评论

学校读者我要写书评

暂无评论

An SdN based Fast rerouting Mechanism for Elephant Flows in dCN

An SDN based Fast Rerouting Mechanism for Elephant Flows in ...

引用

2017 IEEE 8th International Conference on Software engineering and Service Science

作者： Weifei Zang Zijin Jin Julong Lan China National Digital Switching System Engineering & Technological R&D Center

data center Networks(dCNs) should provide low latency and high throughput to meet users' demands. However the coexistence of mice and elephant flows may jeopardize achieving both performance objectives simultaneously. Existing load agnostic routing techniques work well for mice flows but make elephant flows collide on the same output port, creating an avoidable bottleneck. In this paper, we present an SdN based Fast rerouting Mechanism(SFrM) for rescheduling elephant flows in a load-aware manner. An elephant flow selecting module is added into the controller to reschedule elephant flows selectively and reroutes a few elephant flows by Segment routing(Sr) technique. Simulations show that SFrM improves the network throughput and reduces the Flow Completion Time(FCT) significantly.

关键词： data center network SdN multipath routing MOPSO Segment routing

来源：评论

学校读者我要写书评

暂无评论

ratings distribution recommendation Model-based Collaborative Filtering recommendation Algorithm

Ratings Distribution Recommendation Model-based Collaborativ...

引用

2017 2nd International Conference on Software, Multimedia and Communication engineering（SMCE 2017)

作者： Tao-tao PAN Qin-rang LIU Chang LIU China National Digital Switching System Engineering and Technological R&D Center

In order to solve the problem of the popular item ratings interfering in similarity calculation,we proposed the ratings distribution recommendation *** on this model,we designed a new collaborative filtering *** to ratings distribution,this algorithm firstly get the amount of information carried(The Shannon Entropy).Then,it calculated the rating weights to filter into traditional similarity *** experimental results show that the algorithm can effectively alleviate the above problem and improve the performance of the algorithm.

关键词： Collaborative filtering Similarity Popular ratings rating scale

来源：评论

学校读者我要写书评

暂无评论

FPGA-Based Packets Processing Acceleration Platform for VNF

FPGA-Based Packets Processing Acceleration Platform for VNF

引用

2017 IEEE 8th International Conference on Software engineering and Service Science

作者： Tianyi Lan Qing Han Hongwei Fan Julong Lan China National Digital Switching System Engineering & Technological R&D Center

While there has been a belief over the past few years that virtual network functions(VNFs) should be built on common servers, we argue that it can lead to limited performance and large up/down traffic. This paper proposes a new idea of shifting part of NFV functions from software packages to common hardware devices to promote overall performance. Then we present the design and implementation of PPAP, a Packets Processing Acceleration Platform for NFV. It offers high flexibility by allowing functions to control the processing flow of *** match tables and virtualization techniques ensure isolation among VNF instances.

关键词： network function virtualization programmable hardware structure dynamic partial reconfiguration match table

来源：评论

学校读者我要写书评

暂无评论

A Game-Theoretic Approach to Elastic Control in Software-defined Networking

引用

china Communications 2016年第5期13卷 103-109页

作者： Hongchang Chen Guozhen Cheng Zhiming Wang National Digital Switching System Engineering&Technological R&D Center Zhengzhou 450002China

Elastic control could balance the distributed control plane in Software-defined Networking(SdN). dynamic switch migration has been proposed to achieve it. However, existing schemes mainly focus on how to execute migration operation, but not why. This paper designs a decision-making mechanism based on zero-sum game theory to reelect a new controller as the master for migrated switches. It first chooses a switch for migration in the heavy controller which invites its neighbors as the game players to compete for the master role of this switch in the game-playing field(GPF) which is an occasional and loose domain for game-playing. Second, based on the concept of GPF, we design a decentralized strategy to play the game and determine which player as the final master. We implement it by extending the Open Flow protocol. Finally, numerical results demonstrate that our distributed strategy can approach elastic control plane with better performance.

关键词： software-defined networking master election game theory OpenFlow

来源：评论

学校读者我要写书评

暂无评论

Theoretical Model for Patterns of VICTS Antenna

Theoretical Model for Patterns of VICTS Antenna

引用

2017 17th IEEE International Conference on Communication technology (ICCT 2017)

作者： Jun Gao Xue Lei Junmo Wu Tianpeng Li National Digital Switching System Engineering and Technological R&D Center

A theoretical model for array patterns of variable inclination continuous transverse stub(VICTS) antenna is proposed. The theoretical model is utilized to reveal the nonlinear relationship in beam scanning between the angular position of beam and the rotation angle of the radiation layer. A dynamic coordination system is used to simplify the theoretical model and reduce errors. Based on the dynamic coordination system, array pattern of VICTS antenna with arbitrary amplitude distribution and arbitrary aperture shape can be calculated by the theoretical model. Both the full-wave simulations and computation of the theoretical model are carried out. The calculation errors of the angular position of beam between the proposed method and the full-wave simulation are less than 1°. By using the proposed method, the problem of nonlinear and dynamic beam steering in the VICTS antenna servo control system can be solved.

关键词： VICTS antenna beam scanning pattern model

来源：评论

学校读者我要写书评

暂无评论

design of a Compact dumbbell-Shape Twist Waveguide with Performance of Band-Pass Filtering

Design of a Compact Dumbbell-Shape Twist Waveguide with Perf...

引用

2017 17th IEEE International Conference on Communication technology (ICCT 2017)

作者： Haoming Hu Xue Lei Junmo Wu National Digital Switching System Engineering and Technological R＆D Center

A dumbbell-shape 90° step twist waveguide with the performance of band-pass filtering is proposed. Not only could the smooth dumbbell-shape structure be easily manufactured but also avoid high-strength electric field that excited by corner point. Traditional metal waveguide section is replaced by medium substrate. This waveguide can achieve the 90° polarization rotation of electromagnetic wave, also can be regarded as a filter with 190 MHz bandwidth. The twist waveguide has the features of high Q factor, small size and low manufacturing costs. The measured insertion loss is 0.9 dB and the relative bandwidth compared with the bandwidth of the structure with similar function is broadened by 58%. The total length of the twist section is only 1.6 mm and it achieves the miniaturization of device dramatically.

关键词： step twist waveguide band-pass filter medium substrate polarization rotation

来源：评论

学校读者我要写书评

暂无评论

A Micro-buffered router Architecture and deflection routing Algorithm for Vertically Partially Connected 3d NoC

A Micro-buffered Router Architecture and Deflection Routing ...

引用

2017 2nd International Conference on Software, Multimedia and Communication engineering（SMCE 2017)

作者： Jun-yu ZHAO Qin-rang LIU Chang LIU Kai-xuan dENG National Digital Switching System Engineering & Technological R&D Center

due to the problem of high hardware cost and low yield of the TSV in 3 d No C,the vertically partially connected 3 d No C with limit number of TSV has been researched *** respect to little research on micro-buffered router which is suitable for this topology and can further reduce hardware cost,a micro buffered router in vertically partially connected 3 d No C is *** router is the 3 d extension of Min Bd and modifies side-buffer design in Min Bd at the same *** a deflection routing algorithm based on this router is *** productive output ports of the intra-layer communication packet are calculated according to the direction of destination node and the productive output ports of the inter-layer communication packet are calculated according to the distribution of TSV in current *** experimental results show that the network performance of our router is better than reference micro buffered routers',while even is similar to traditional buffered routers in low and medium network traffic environment.

关键词： Micro-buffered router routing algorithm Vertically partially connected 3d NoC

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：