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Conflict-free Connection Number and Independence Number of a Graph

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Acta Mathematicae Applicatae Sinica 2021年第2期37卷 278-286页

作者： Jing WANG Meng JI School of Computer Engineering and Applied Mathematics Changsha UniversityChangsha 410022China hunan province key laboratory of industrial internet technology and security Changsha UniversityChang-sha 410022China College of Mathematical Science Tianjin Normal UniversityTianjin 300007China

An edge-colored graph G is conflict-free connected if any two of its vertices are connected by a path,which contains a color used on exactly one of its *** conflict-free connection number of a connected graph G,denoted by cf c(G),is defined as the minimum number of colors that are required in order to make G conflict-free *** this paper,we investigate the relation between the conflict-free connection number and the independence number of a *** firstly show that cf c(G)≤α(G)for any connected graph G,and give an example to show that the bound is *** this result,we prove that if T is a tree with?(T)≥(α(T)+2)/2,then cf c(T)=?(T).

关键词： edge-coloring conflict-free connection number independence number tree

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AR-CNN: an attention ranking network for learning urban perception

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Science China(Information Sciences) 2022年第1期65卷 164-174页

作者： Zhetao LI Ziwen CHEN Wei-Shi ZHENG Sangyoon OH Kien NGUYEN key laboratory of hunan province for internet of Things and Information security Xiangtan University key laboratory of Intelligent Computing & Information Processing of Ministry of Education Xiangtan University School of Data and Computer Science Sun Yat-sen University Department of Computer and Information Engineering Ajou University Graduate School of Engineering Chiba University

An increasing number of deep learning methods is being applied to quantify the perception of urban environments, study the relationship between urban appearance and resident safety, and improve urban appearance. Most advanced methods extract image feature representations from street-level images through conventional visual computation algorithms or deep convolutional neural networks and then directly predict the results using features. Unfortunately, these methods take color and texture information together during processing. Color and texture are prime image features, and they affect human perception and judgment differently. We argue that color and texture should be operated differently; therefore, we formulate an end-to-end learning methodology to process input images according to color and texture information before inputting it into the neural network. The processed images and the original image constitute three input streams for the triad attention ranking convolutional neural network(AR-CNN) model proposed in this *** accordance with the aspects of color and texture, an improved attention mechanism in the convolution layer is proposed. Our objective is to obtain the scores of humans on urban appearance in accordance with the prediction results computed from pairwise comparisons generated by the AR-CNN model.

关键词： ranking network urban perception attribute learning attention network colour and texture

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A Dynamic Multi-Attribute Resource Bidding Mechanism with Privacy Protection in Edge Computing

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Computers, Materials & Continua 2023年第4期75卷 373-391页

作者： Shujuan Tian Wenjian Ding Gang Liu Yuxia Sun Saiqin Long Jiang Zhu Xiangtan University Xiangtan411105China key laboratory of hunan province for internet of Things and Information security Xiangtan411105China hunan International Scientific and Technological Cooperation Base of Intelligent Network Xiangtan411105China hunan University Changsha410082China Jinan University Guangzhou510632China

In edge computing,a reasonable edge resource bidding mechanism can enable edge providers and users to obtain benefits in a relatively fair *** maximize such benefits,this paper proposes a dynamic multiattribute resource bidding mechanism(DMRBM).Most of the previous work mainly relies on a third-party agent to exchange information to gain optimal *** isworth noting thatwhen edge providers and users trade with thirdparty agents which are not entirely reliable and trustworthy,their sensitive information is prone to be ***,the privacy protection of edge providers and users must be considered in the dynamic pricing/transaction process,which is also very ***,this paper first adopts a privacy protection algorithm to prevent sensitive information from *** the premise that the sensitive data of both edge providers and users are protected,the prices of providers fluctuate within a certain ***,users can choose appropriate edge providers by the price-performance ratio(PPR)standard and the reward of lower price(LPR)standard according to their *** two standards can be evolved by two evaluation ***,this paper employs an approximate computing method to get an approximate solution of DMRBM in polynomial ***,this paper models the bidding process as a non-cooperative game and obtains the approximate optimal solution based on two standards according to the game *** the extensive experiments,this paper demonstrates that the DMRBM satisfies the individual rationality,budget balance,and privacy protection and it can also increase the task offloading rate and the system benefits.

关键词： Edge computing approximate computing nash equilibrium privacy protection

Research on Intelligent Mobile Commerce Transaction security Mechanisms Based on Mobile Agent

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Computers, Materials & Continua 2020年第12期65卷 2543-2555页

作者： Weijin Jiang Wei Liu Haolong Xia Yuhui Xu Dongbo Cao Guo Liang College of Computer and Information Engineering Hunan University of Technology and BusinessChangsha410205China Institute of Big Data and internet Innovation Mobile E-business Collaborative Innovation Center of Hunan ProvinceHunan University of Technology and BusinessChangsha410205China key laboratory of hunan province for New Retail Virtual Reality technology Hunan University of Technology and BusinessChangsha410205China School of Bioinformatics University of MinnesotaTwin CitiesUSA

In networked mobile commerce network transactions,trust is the prerequisite and key to a smooth *** measurement of trust between entities involves factors such as transaction amount,transaction time,personal income of consumer entities and their risk attitude towards trust,etc.,so it is difficult to accurately calculate *** order to find out the essential characteristics of this trust relationship,based on the research background of mobile commerce in the mobile network environment,a dynamic trust mechanism is proposed through the research of trust in the mobile network environment,trust influencing factors and trust *** calculation model of mobile interactive services based on mobile service business *** model calculates feedback credibility through feedback deviation and feedback robustness,and combines transaction context factors and trust mapping mechanism to judge the seller’s *** model better reflects the degree of influence of subjective factors such as personal preferences and risk attitudes on trust calculations,And the sensitivity of trust algorithms and transaction attributes has been greatly *** a large number of experiments and theoretical analysis,this mechanism provides an effective explanation for solving the problem of network trust *** provides valuable new ideas for the study of secure transactions in the mobile internet environment.

关键词： Mobile internet mobile commerce dynamic trust model reputation management Mobile Agent System(MAS)

Research on Mobile internet Mobile Agent System Dynamic Trust Model for Cloud Computing

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China Communications 2019年第7期16卷 174-194页

作者： Weijin Jiang Yang Wang Yirong Jiang Jiahui Chen Yuhui Xu Lina Tan Institute of Big Data and internet Innovation Mobile E-business Collaborative Innovation Center of Hunan Province Hunan University of Commerce Changsha 410205 China key laboratory of hunan province for New Retail Virtual Reality technology Hunan University of Commerce Changsha 410205 China School of Computer Science and technology Wuhan University of Technology Wuhan 430073 China Tonghua Normal University Tonghua 134002 China

This paper analyzes the reasons for the formation of security problems in mobile agent systems, and analyzes and compares the security mechanisms and security technologies of existing mobile agent systems from the perspective of blocking attacks. On this basis, the host protection mobile agent protection technology is selected, and a method to enhance the security protection of mobile agents (referred to as IEOP method) is proposed. The method first encrypts the mobile agent code using the encryption function, and then encapsulates the encrypted mobile agent with the improved EOP protocol IEOP, and then traces the suspicious execution result. Experiments show that using this method can block most malicious attacks on mobile agents, and can protect the integrity and confidentiality of mobile agents, but the increment of mobile agent tour time is not large.

关键词： mobile internet cloud computing mobile agent system subjective trust dynamic trust management

维普期刊数据库

Mobile internet Mobile Agent System Dynamic Trust Model for Cloud Computing

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Computers, Materials & Continua 2020年第1期62卷 123-136页

作者： Weijin Jiang Yang Wang Yirong Jiang Yuhui Xu Jiahui Chen Lina Tan Guo Liang key laboratory of hunan province for New Retail Virtual Reality technology Hunan University of Technology and BusinessChangsha410205China Institute of Big Data and internet Innovation Hunan University of Technology and BusinessChangsha410205China School of Computer Science and technology Wuhan University of TechnologyWuhan430073China Tonghua Normal University Tonghua134002China School of Bioinformatics University of MinnesotaTwin CitiesUSA

In mobile cloud computing,trust is a very important parameter in mobile cloud computing security because data storage and data processing are performed remotely in the *** at the security and trust management of mobile agent system in mobile cloud computing environment,the Human Trust Mechanism(HTM)is used to study the subjective trust formation,trust propagation and trust evolution law,and the subjective trust dynamic management algorithm(MASTM)is *** on the interaction experience between the mobile agent and the execution host and the third-party recommendation information to collect the basic trust data,the public trust host selection algorithm is *** isolated malicious host algorithm and the integrated trust degree calculation algorithm realize the function of selecting the trusted cluster and isolating the malicious host,so as to enhance the security interaction between the mobile agent and the *** algorithm simulation and verification were carried out to prove its feasibility and effectiveness.

关键词： Cloud computing mobile agent system subjective trust objective trust dynamic trust management mobile internet

Ageing characteristics and lifetime model of oil-paper insulation for oil-immersed paper condenser bushing

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High Voltage 2021年第2期6卷 278-290页

作者： Sihang Gao Lijun Yang Tingjing Ke key laboratory of industrial internet of Things and Networked Control Ministry of EducationChongqing University of Posts and TelecommunicationsChongqingChina State key laboratory of Power Transmission Equipment and System security and New technology Chongqing UniversityChongqingChina State Grid Chongqing Electric Power Company Chongqing ChongqingChina

This study extensively investigated the ageing characteristics and lifetime model of oil-paper insulation for oil-immersed paper condenser *** accelerated thermal and electrothermal ageing experiments of oil-immersed paper condenser bushing were con-ducted *** properties of oil-paper insulation during the ageing process were *** showed that descending speed of degree of polymerization of the innermost and the outermost layer paper was higher than that of middle layer paper,the difference in water content on different paper layers caused varying deterioration *** aluminium foil contributed to a surge in aluminium dissolution in oil,further accelerating the ageing of *** on the obtained degree of polymerization data under thermal ageing at 90°C,100°C and 130°C,the lifetime model of oil-paper insu-lation for condenser bushing model was *** addition,the surface breakdown of the scale model of bushing occurred after 133 days ageing,the properties of bushing decreased gradually during the ageing process and sharply after the *** of polymerization deviation of different paper layers in bushing between calculated value according to the above lifetime model and actual value of bushing after the breakdown was less than 6%,further verifying the validity of lifetime model.

关键词： lifetime immersed insulation

An improved defect recognition framework for casting based on DETR algorithm

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Journal of Iron and Steel Research International 2023年第5期30卷 949-959页

作者： Long Zhang Sai-fei Yan Jun Hong Qian Xie Fei Zhou Song-lin Ran Anhui province key laboratory of Metallurgical Engineering&Resources Recycling Anhui University of TechnologyMa’anshan 243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243002AnhuiChina Technical Department Anhui Highly Precision Casting Co.Ltd.Ma’anshan 238100AnhuiChina Anhui Engineering laboratory for Intelligent Applications and security of industrial internet Anhui University of TechnologyMa’anshan 243032AnhuiChina

The current casting surface defect detection algorithms suffer from poor small target defect recognition and imbalance between detection performance and detection *** improved algorithmic framework for casting defect detection was proposed based on the DEtection TRansformer(DETR)*** algorithm takes ResNet with an efficient channel attention(ECA)-Net module as the backbone *** addition,based on the original algorithm architecture,dynamic anchor boxes,improved multi-scale deformable attention module,and SIoU loss function are introduced to improve the sensitivity of transformer structure to input location information and scale size,and the small target defect detection performance is effectively *** recognition performance of the algorithm in a self-built casting defect dataset was *** improved DETR algorithm has 97.561% accuracy in recognizing two defects,namely sandinclusion and notch,with the detection rate being improved by 65.854% and 17.073% compared with the original DETR and you only look once(Yolo)-V5,*** algorithm verifies the applicability of the transformer architecture target detection algorithm for casting defect detection tasks and provides new ideas for detecting other similar application scenarios.

关键词： Casting defect recognition DEtection TRansformer Small target detection Deep learning Attention mechanism

Insight into the characteristics of an important evolutionary model bird(Geospiza magnirostris)mitochondrial genome through comparison

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BIOCELL 2022年第7期46卷 1733-1746页

作者： ZHENGGANG XU LIANG WU JIAHAO CHEN YUNLIN ZHAO CHONGXUAN HAN TIAN HUANG GUIYAN YANG key laboratory of National Forestry and Grassland Administration on Management of Western Forest Bio-Disaster College of ForestryNorthwest A&F UniversityYangling712100China Engineering Research Center for internet of Animals Changsha410000China key laboratory of Forestry Remote Sensing Based Big Data&Ecological security for hunan province Central South University of Forestry and TechnologyChangsha410004China

Darwin’s finches are the most classic case of *** studies on the evolution of this species were mainly based on *** now,the mitochondrial genome of Geospiza magnirostris has been sequenced and the study explored the characteristics of the complete genome of *** and verified the evolutionary position of *** 13 PCGs initiated by ATN *** stop codons of three PCGs(ND2,COX3 and ND4)were incomplete,with only T-or TA-replacing complete form TAA or *** the tRNA genes expressed a typical cloverleaf secondary structure,except for tRNA^(Ser1)(AGY),whose dihydrouridine(DHU)arm was lack and instead with a simple *** the sequence of the control region of ***,we found six simple repeat tandem sequences with a total length of 42 *** characteristic conserved overlapping junction(ATGCTAA)and(CAAGAAAG)were observed as reported for eight selected Passeriformes birds.A special conserved overlapping junction(ATCTTACC)involved in mitochondrial transcription termination was found between tRNA^(Tyr) and COX1 in ***’s control *** most frequently used amino acids in ***’s PCGs were Leu1(CUN),Ile,Thr,*** codon usage of *** was relatively average,and there was no particular *** ratio Ka/Ks results showed that *** receives less natural selection *** phylogenetic relationships and cluster analysis of relative codon usage showed that *** and Thraupis episcopus clustered in one *** phylogenetic position of *** was consistent with the traditional taxonomic of *** results supported the conclusion that *** belongs to the morphological classification of the family Thraupidae.

关键词： Geospiza magnirostris Mitochondrial genome Comparative analysis Evolution analysis Phylogenetic relationships