检索结果-南通市图书馆

Stackelberg Game-Based Resource Allocation with Blockchain for Cold-Chain Logistics System

Computers, Materials & Continua 2023年第5期75卷 2429-2442页

作者： Yang Zhang Chaoyang Li xiangjun xin College of Food and Bioengineering Zhengzhou University of Light IndustryZhengzhou450002China College of Software Engineering Zhengzhou University of Light IndustryZhengzhou450002China

Cold-chain logistics system(CCLS)plays the role of collecting and managing the logistics data of frozen ***,there always exist problems of information loss,data tampering,and privacy leakage in traditional centralized systems,which influence frozen food security and people’s *** centralized management form impedes the development of the cold-chain logistics industry and weakens logistics data *** paper first introduces a distributed CCLS based on blockchain technology to solve the centralized management *** system aggregates the production base,storage,transport,detection,processing,and consumer to form a cold-chain logistics *** blockchain ledger guarantees that the logistics data cannot be tampered with and establishes a traceability mechanism for food safety ***,to improve the value of logistics data,a Stackelberg game-based resource allocation model has been proposed between the logistics data resource provider and the *** competition between resource price and volume balances the resource supplement and *** model can help to achieve an optimal resource price when the Stackelberg game obtains Nash *** two participants also can maximize their revenues with the optimal resource price and volume by utilizing the backward induction ***,the performance evaluations of transaction throughput and latency show that the proposed distributed CCLS is more secure and *** simulations about the variation trend of data price and amount,optimal benefits,and total benefits comparison of different forms show that the resource allocation model is more efficient and ***,the blockchain-based CCLS and Stackelberg game-based resource allocation model also can promote the value of logistic data and improve social benefits.

关键词： Cold-chain logistics resource allocation Stackelberg game blockchain

来源：

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

Efficient Group Blind Signature for Medical Data Anonymous Authentication in Blockchain-Enabled IoMT

引用

Computers, Materials & Continua 2023年第7期76卷 591-606页

作者： Chaoyang Li Bohao Jiang Yanbu Guo xiangjun xin College of Software Engineering Zhengzhou University of Light IndustryZhengzhou450002China

Blockchain technology promotes the development of the Internet of medical things(IoMT)from the centralized form to distributed trust mode as blockchain-based Internet of medical things(BIoMT).Although blockchain improves the cross-institution data sharing ability,there still exist the problems of authentication difficulty and privacy *** paper first describes the architecture of the BIoMT system and designs an anonymous authentication model for medical data *** BIoMT system is divided into four layers:perceptual,network,platform,and *** model integrates an anonymous authentication scheme to guarantee secure data sharing in the network *** the untampered blockchain ledger can protect the privacy of medical data and system ***,an anonymous authentication scheme called the group blind signature(GBS)scheme is *** scheme can provide anonymity for the signer as that one member can represent the group to sign without exposing his *** blind property also can protect the message from being signed as it is anonymous to the ***-over,this GBS scheme is created with the lattice assumption,which makes it more secure against quantum *** addition,the security proof shows that this GBS scheme can achieve the security properties of dynamical-almost-full anonymity,blindness,traceability,and *** comparison analysis and performance evaluation of key size show that this GBS scheme is more efficient than similar schemes in other literature.

关键词： Blockchain Internet of medical things signature privacy-preserving

来源：

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

Performance Analysis of Optical Transmission Based on Seven Cores Fiber

引用

China Communications 2016年第9期13卷 113-120页

作者： Hang Zhou Fu Wang Borui Li Ming Tang xiangjun xin School of Electronic Engineering Beijing University of Posts and Telecommunication Wuhan National lab for Optoelectronics(WNLO) Huazhong University of Sci&Tech(HUST)

This essay designed a kind of new seven-core fiber with lower crosstalk and loss, and made space division multiplexing transmission experiment based on this seven-core fiber. It is known that crosstalk has the most serious influence in multicore fiber transmission process. Before the experiment, the affecting factors of fiber crosstalk were analyzed through simulation, such as core space, bending radius, and fiber length. Combined with the simulation analysis, the design scheme of multicore fiber with low crosstalk was obtained. Before the fiber design, various factors of influence crosstalk such as the core- to-core distance, bending radius, fiber length and so on. Based on the simulation analysis, conclusion has made on the design scheme of multi-core optimal fiber with low crosstalk. The space division multiplexing and wavelength division multiplexing technology, was adopted to conduct seven-core optical fiber transmission of *** crosstalk of adjacent core was suppressed to as low as 45dB / km, the attenuation of inner core was 0.24dB/ km, the outer cores＇ 0.32dB/km. Different bit error rate （BER） performances were also studied under different conditions, through reasonably designing the system to reduce the error rate, improve the performance of the system, and realize long distance and large capacity transmission with fiber.

关键词： multicore fiber crosstalk space division multiplexing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Novel Trellis Coded Overlapping Amplitude and Pulse Position Modulation Scheme for Gamma-Gamma Channel Free-Space Optical Communication

引用

China Communications 2016年第4期13卷 58-69页

作者： WANG Kaimin LIU Bo ZHANG Lijia ZHANG Qi TIAN Qinghua xin xiangjun School of Electronic Engineering State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications(BUPT)

A novel trellis coded-4×8 overlapping amplitude and pulse position modulation(TC-4×8AOPPM) scheme is proposed to enhance bit error rate(BER) performance of free-space optical communication(FSO) system. In addition, an uncoded AOPPM referential scheme is also designed. The schemes manage to decrease BER by designing gamma-gamma(GG) channel applicable decoding and demodulation methods. Simulation results of 8, 16 and 64-state TC-4×8AOPPM show 2.5-3.3 dB SNR gain against traditional TC-4×8AOPPM scheme respectively. Thus significant BER performance improvement is achieved and the reliability of the FSO system is also enhanced.

关键词： AOPPM TCM mapping turbulent atmospheric channel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Review of Coded Modulation Free Space Optical Communication System

引用

China Communications 2015年第11期12卷 62-78页

This paper presents a constructive discussion and inclusive review on advancements in the coded modulation free-space optical(FSO) communication system and corresponding techniques. These techniques mainly include channel model,forward error correction(FEC) and modulation schemes. Firstly,a complete view of FSO system is presented which contains the description,the current research situation along with the advantages over the traditional radio frequency(RF) wireless communication and fiber optical communications. Then,the channel model,FEC,modulation schemes and complete system of coded modulation FSO are analyzed successively. At last,the review work of coded modulation FSO system is summarized and further improvements are prospected.

关键词： FSO turbulence channel FEC modulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ant colony optimization based load balancing routing and wavelength assignment for optical satellite networks

引用

The Journal of China Universities of Posts and Telecommunications 2017年第5期24卷 77-86页

作者： Wen Guoli Zhang Qi Wang Houtian Tian Qinghua Zhang Wei xin xiangjun School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China Beijing Key Laboratory of Space-Ground Intercormection and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China China Academy of Space Technology Beijing 100094 China Science and Technology on Information Systems Engineering Laboratory National University of Defense Technology Changsha 410073 China

An ant colony optimization （ACO） based load balancing routing and wavelength assignment （RWA） algorithm （ALRWA） was put forward for the sake of achieving a fairy load balancing over the entire optical satellite networks. A multi-objective optimization model is established considering the characteristic of global traffic distribution. This not only employs the traffic intensity to modify the light path cost, but also monitors the wavelength utilization of optical inter-satellite links （ISLs）. Then an ACO algorithm is utilized to solve this model, leading to finding an optimal light path for every connection request. The optimal light path has the minimum light path cost under satisfying the constraints of wavelength utilization, transmission delay and wavelength-continuity. Simulation results show that ALRWA performs well in blocking probability and realizes efficient load balancing. Meanwhile, the average transmission delay can meet the basic requirement of real-time business transmission.

关键词： load balancing ACO RWA optical satellite network

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Signature Scheme with Non-Repudiation

引用

Wuhan University Journal of Natural Sciences 2006年第5期11卷 1249-1252页

作者： xin xiangjun GUO Xiaoli XIAO Guozhen State Key Laboratory of Integrated Service Networks Xidian University Xi＇an 710071 Shaanxi China Department of Information and Computing Science Zhengzhou University of Light Industry Zhengzhou 450002Henan China

Based on the Schnorr signature scheme, a new signature scheme with non-repudiation is proposed. In this scheme, only the signer and the designated receiver can verify the signature signed by the signer, and if necessary, both the signer and the designated receiver can prove and show the validity of the signature signed by the signer. The proof of the validity of the signature is noninteractive and transferable. To verify and prove the validity of the signature, the signer and the nominated receiver needn＇t store extra information besides the signature. At the same time, neither the signer nor the designated receiver can deny a valid signature signed. Then, there is no repudiation in this new signature scheme. According to the security analysis of this scheme, it is found the proposed scheme is secure against existential forgery on adaptive chosen message attack.

关键词： digital signature Schnorr signature non-repudiation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Novel Non-Equidifferent Optical APPM Mapping Scheme for Strong Turbulent Atmospheric Channel

引用

China Communications 2015年第3期12卷 35-42页

作者： WANG Kaimin ZHANG Lijia LIU Bo ZHANG Qi TIAN Qinghua XU Peng xin xiangjun School of Electronic Engineering State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications(BUPT) Shandong Police Training College

An optical Amplitude and Pulse Position Modulation(APPM) mapping scheme for strong turbulent atmospheric channel is proposed to optimize Bit Error Rate(BER) *** this scheme,a nonequidifferent amplitude series is designed based on quantitative BER analysis of the specific A×M APPM demapping procedures containing time slot selection and amplitude decision in selected time slot,which are different from traditional *** results of 4×4,4×8 and 4×16 APPM show 4,3.4 and 6.9 d B SNR gain against traditional APPM scheme *** significant BER performance improvement is achieved which helps to enhance reliability of freespace optical communication systems.

关键词： APPM Mapping Turbulent atmospheric channel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A multi-path routing algorithm of LEO satellite networks based on an improved ant colony system

引用

High Technology Letters 2014年第3期20卷 253-260页

作者：王厚天 Zhang Qi xin xiangjun Tao Ying Chen Dong Liu Naijin School of Electronic Engineering Beijing University of Posts and Telecommunications State Key Lab of Information Photonics and Optical Communication

Geography rectangle is used to reduce signaling overhead of the LEO satellite ***,a multi-path routing algorithm based on an improved ant colony system(MPRA-AC) is *** indicating the importance of the link between satellites is introduced into MPRA-AC in order to find the optimal path more *** results show that MPRA-AC reduces the number of iterations to achieve a satisfactory *** the same time,the packet delivery ratio of LEO satellite networks when running MPRA-AC and DSR-LSN(dynamic source routing algorithm for LEO satellite networks) is *** packet delivery ratio is about 7.9%lower when running ***,because of the mechanism of active load balancing of MPRA-AC,simulation results show that MPRA-AC outperforms DSR-LSN in link utilization when data packets are transmitted in the networks.

关键词： ant colony algorithm low earth orbit (LEO) packet delivery ratio routing satellite networks

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Iterative Signal Detection Based Soft Interference Cancellation for Satellite-Terrestrial Downlink NOMA Systems

引用

China Communications 2024年第8期21卷 249-263页

作者： Sun Meng Zhang Qi Yao Haipeng Gao Ran xin xiangjun Tian Feng Feng Weiying Chen Dong School of Electronic Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Key Laboratory of Space-Ground Interconnection and Convergence State Key Laboratory of Information Photonics and Optical CommunicationsSchool of Electronic EngineeringBeijing University of Posts and Telecommunications(BUPT)Beijing 100876China School of Information and Communication Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Institute of Technology Beijing 100081China Beihang University Beijing 100191China China Academy of Space Technology(CAST) Beijing 100094China

To improve the bit error rate(BER)performance of multi-user signal detection in satelliteterrestrial downlink non-orthogonal multiple access(NOMA)systems,an iterative signal detection algorithm based on soft interference cancellation with optimal power allocation is *** that power allocation has a significant impact on BER performance,the optimal power allocation is obtained by minimizing the average BER of NOMA *** to the allocated powers,successive interference cancellation(SIC)between NOMA users is performed in descending power *** each user,an iterative soft interference cancellation is performed,and soft symbol probabilities are calculated for soft *** improve detection accuracy and without increasing the complexity,the aforementioned algorithm is optimized by adding minimum mean square error(MMSE)signal estimation before detection,and in each iteration soft symbol probabilities are utilized for soft-decision of the current user and also for the update of soft interference of the previous *** results illustrate that the optimized algorithm ***-IDBSIC significantly outperforms joint multi-user detection and SIC detection by 7.57dB and 8.03dB in terms of BER performance.

关键词： non-orthogonal multiple access(NOMA) resource allocation satellite-terrestrial communication signal detection soft interference cancellation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：