检索结果-南通市图书馆

BLE Mesh： A Practical Mesh Networking Development Framework for Public Safety Communications

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2018年第3期23卷 333-346页

作者： Bo Zhang Yufeng Wang Li Wei Qun Jin Athanasios V.Vasilakos Nanjing University of Posts and Telecommunications Nanjing210023 China department of Human informatics andCognitive Sciences Waseda University Saitama 359-1192Japan department of computerscience Electrical and Space Engineering Lulea Universityof Technology Sweden.

Owing to advanced storage and communication capabilities today, smart devices have become the basic interface between individuals and their surrounding environment. in particular, massive devices connect to one other directly in a proximity area, thereby enabling abundant Proximity Services（Pro Se）, which can be classified into two categories： public safety communication and social discovery. However, two challenges impede the quick development and deployment of Pro Se applications. From the viewpoint of networking, no multi-hop connectivity functionality component can be directly operated on commercially off-the-shelf devices, and from the programming viewpoint, an easily reusable development framework is lacking for developers with minimal knowledge of the underlying communication technologies and connectivity. Considering these two issues, this paper makes a twofold contribution. First, a multi-hop mesh networking based on Bluetooth Low Energy（BLE） is implemented,in which a proactive routing mechanism with link-quality（i.e., received signal strength indication） assistance is designed. Second, a Pro Se development framework called BLE Mesh is designed and implemented, which can provide significant benefits for application developers, framework maintenance professionals, and end users. Rich application programming interfaces can help developers to build Pro Se apps easily and quickly. Dependency inversion principle and template method pattern allow modules in BLE Mesh to be loosely coupled and easy to maintain and update. Callback mechanism enables modules to work smoothly together and automation processes such as registration, node discovery, and messaging are employed to offer nearly zero-configuration for end ***, based on the designed Pro Se development kit, a public safety communications app called Quote Send App is built to distribute emergency information in close area without internet access. The process illustrates the easy usability of BLE Mesh

关键词： public safety communications device to device bluetooth low energy mesh networking development framework

在线全文

学校读者我要写书评

暂无评论

基于参数化遗传神经网络的植物病害预测方法

农业机械学报 2004年第6期35卷 110-114页

作者：熊雪梅姬长英 Claudio Moraga 南京农业大学工学院 department of computerscience i University of DortmundDortmund44221Germany

将混合神经网络 (PFNN FG)技术应用于植物病害预测 ,其输入矢量含模糊分量 ,遗传算法优化配置各参数。变形 Sigm oid函数用于不同的隐含层 ,构成参数化神经网络。网络的输入层引入模糊集合理论 ,使网络能处理语义变量。将 PFNN FG和其... 详细信息

将混合神经网络 (PFNN FG)技术应用于植物病害预测 ,其输入矢量含模糊分量 ,遗传算法优化配置各参数。变形 Sigm oid函数用于不同的隐含层 ,构成参数化神经网络。网络的输入层引入模糊集合理论 ,使网络能处理语义变量。将 PFNN FG和其他神经网络 (如前向神经网络、径向基神经网络等 )用于大豆基准问题进行分析比较 ,结果是 PFNN FG在精度和训练速度上优于其他网络。将 PFNN FG和前向神经网络用于 2组黄瓜霜霉病数据 ,前者测试组的均方根误差小于后者。

关键词：植物病虫害防治参数化神经网络模糊集遗传算法

intelligent Dynamic Gesture Recognition Using CNN Empowered by Edit Distance

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第2期66卷 2061-2076页

作者： Shazia Saqib Allah Ditta Muhammad Adnan Khan Syed Asad Raza Kazmi Hani Alquhayz department of computerscience Lahore Garrison UniversityLahore54000Pakistan department of information Sciences Division of Science&TechnologyUniversity of EducationLahore54000Pakistan GC University Lahore54000Pakistan department of Computer Science and information College of Sciencein ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia

Human activity detection and recognition is a challenging *** surveillance can benefit greatly by advances in internet of Things(ioT)and cloud *** intelligence ioT(AioT)based devices form the basis of a smart *** research presents intelligent dynamic gesture recognition(iDGR)using a Convolutional neural network(CNN)empowered by edit distance for video *** proposed system has been evaluated using AioT enabled devices for static and dynamic gestures of Pakistani sign language(PSL).However,the proposed methodology can work efficiently for any type of *** proposed research concludes that deep learning and convolutional neural networks give a most appropriate solution retaining discriminative and dynamic information of the input *** research proposes recognition of dynamic gestures using image recognition of the keyframes based on CNN extracted from the human *** distance is used to find out the label of the word to which those sets of frames belong *** simulation results have shown that at 400 videos per human action,100 epochs,234×234 image size,the accuracy of the system is 90.79%,which is a reasonable accuracy for a relatively small dataset as compared to the previously published techniques.

关键词： Sign languages keyframe edit distance misrate accuracy

Software and Hardware implementation of ⅡR Based on Matlab&Acceldsp

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Software and Hardware Implementation of ⅡR Based on Matlab&...

A Novel Multilevel index Model for Distributed Service Repositories

2012年计算机应用与系统建模国际会议

作者： Chen Hongyan Wang Lisheng department of computerscience and Technology Tongji University

Since the ⅡR design is very difficult and time-consuming by using the hardware description language directly, this paper presents a simpler and more efficient method for iiR digital filter design. This design is based on Batterworth analog filter, using the impulse response invariant method. The design steps are: design non-quantitative ⅡR filter using Matlab;convert the designed ⅡR filter of M language into hardware description language using AccelDSP;then verify and synthesize the ⅡR design using iSE 10.1 of Xilinx. The design is verified by timing simulation and can be implemented on FPGA directly. The key of this design is to analyze the ⅡR digital filter algorithm, then describe it through the synthesizable m language and finally convert the m program to RTL design by using AccelDSP. The aim of this paper is to simplify the ⅡR digital filter design.

关键词： ⅡR digital filter Butterworth analog filter AccelDSP Matlab iSE

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2017年第3期22卷 273-281页

作者： Zhao Xu Yan Wu Dejun Miao Lu Liu School of Computer Science and Communication Engineering Jiangsu UniversityZhenjiang 212013China department of computerscience Boise State UniversityID 83725USA department of Computing and Mathematics University of DerbyDerbyDE22 1GBUK department of Computing and Mathematics University of DerbyDerbyDE22 1GBUK and the School of Computer Science and Communication EngineeringJiangsu UniversityZhenjiang 212013China

This study, based on the theory of equivalence relations, proposes a novel multilevel index model for decentralized service repositories to eliminate redundant information and enhance the time-management quality of the service retrieval process of the service repository architecture. An efficient resource discovery algorithm based on Discrete Hash Tables is presented to enable efficient and effective retrieval services among different distributed repositories. The performance of the proposed model and the supporting algorithms have been evaluated in a distributed environment. Experimental results validate the effectiveness of our proposed indexing model and search algorithm.

关键词： service computing distributed algorithm service retrieval service storage

Ultra-sensitive graphene strain sensor for sound signal acquisition and recognition

在线全文

学校读者我要写书评

暂无评论

Nano Research 2015年第5期8卷 1627-1636页

作者： Yan Wang Tingting Yang Junchao Lao Rujing Zhang Yangyang Zhang Miao Zhu Xiao Li Xiaobei Zang Kunlin Wang Wenjian YU Hu Jin Li Wang Hongwei Zhu department of Physics and institute for Advanced Study Nanchang University Nanchang 330031 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory ot Materials Processing Technology of MOE Tsinghua University Beijing 100084 China department of computerscience and Technology Tsinghua University Beijing 100084 China 2D Carbon Graphene Material Co. Ltd. Changzhou 213149 China

为健全信号获得和识别的一个便携、高精确的传感器从编织的特殊设计的 graphene 的薄电影被制作织物(GWF ) 。在被拉长之上，随机的裂缝的高密度出现在网络，它减少当前的小径，从而增加电阻。因此，这部电影能对人的喉咙作为一个紧张... 详细信息

为健全信号获得和识别的一个便携、高精确的传感器从编织的特殊设计的 graphene 的薄电影被制作织物(GWF ) 。在被拉长之上，随机的裂缝的高密度出现在网络，它减少当前的小径，从而增加电阻。因此，这部电影能对人的喉咙作为一个紧张传感器起作用以便测量通过肌肉运动，一个声音是否被生产的讲话。超离频敏感允许由提取声波的签名特征的快速、低频率的讲话采样的实现。在这研究， 26 封英语信，典型汉字和音调的代表性的信号，甚至短语和句子被测试，揭示在电阻的明显、典型的变化。而且， graphene 传感器的电阻变化与预告录下的声音完美地反应了。由把人工智能与数字信号处理相结合，我们期望以后，这个 graphene 传感器将能成功地达成复杂声学的系统和听觉的数据的大数量。

关键词：应变传感器声音信号信号采集石墨识别超灵敏数字信号处理英文字母

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于参数优化批处理的TLS协议(英文)

软件学报 2007年第6期18卷 1522-1530页

作者：齐芳贾维嘉鲍丰吴永东王国军中南大学信息科学与工程学院 Agency for Science Technology and Research Institute for Infocomm ResearchSingapore 119613Singapore department of computerscience City University of Hong KongKowloon TongKowloonHong Kong

TLS(transport layer security)协议的基本设计目标是为两个通信实体之间提供数据的保密性和完整性.由于在传输层安全握手协议中最耗费计算资源的步骤是服务器RSA解密运算,优化的批处理的RSA方法提出可以用于加速 TLS 会话的初始化.首... 详细信息

TLS(transport layer security)协议的基本设计目标是为两个通信实体之间提供数据的保密性和完整性.由于在传输层安全握手协议中最耗费计算资源的步骤是服务器RSA解密运算,优化的批处理的RSA方法提出可以用于加速 TLS 会话的初始化.首先指出了以前的批处理方法由于要求多证书实现而实用性不强.然后提出了单一证书策略的方法,从而克服了这一问题.还提出结合用户对于因特网服务质量的要求优化了批处理参数.为了选择优化的批处理的参数,不仅考虑了服务器的性能,而且还考虑了客户可容忍的等待时间.通过分析并在阐述平均排队时间、批处理服务时间和系统稳定性的基础上提出了一种新颖的优化批处理调度算法,已部署在服务器上.最后通过分析和模拟两种方法验证了所提出方案的实用性和有效性.

关键词：传输层安全协议批处理RSA TLS握手协议平均响应时间可容忍的等待时间