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Roles of Cu doping in YbZn_(2.Sb_(2. for thermoelectric performance enhancement

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Rare Metals 2024年第6期43卷 2869-2875页

作者： Xiong zhang Hai-Hui Li xiao-Liang Cao Bin zhang Hong Wu yu zhang Guang Han Guo-yu Wang Hao-Shuang Gu xiao-yuan Zhou College of Physics and Electronic science Hubei Normal UniversityHuangshi 435002China Analytical and Testing Center Chongqing UniversityChongqing401331China School of science Chongqing University of Posts and Telecommunications.Chongqing 400065 China College of Materials science and engineering Chongqing UniversityChongqing 400044China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials-Hubei Key Laboratory of Ferro&Piezoelectric Materials and Devices Faculty of Physical and Electronic SciencesHubei UniversityWuhan 430062China College of Physics Chongqing UniversityChongqing 401331China

Recent research shows that increasing the carrier density after orbital alignment in AZn_(2.Sb_(2. (A=Ca,Yb,Eu,Sr,Mg)Zintl compounds yields remarkable results with regard to enhanced thermoelectric ***,research on carrier density increase via doping in these compounds is *** this study,we introduced Cu into the Zn sites in YbZn_(2.Sb_(2. and examined the thermoelectric properties.

关键词： properties doping performance

AdaPIP: Adaptive picture-in-picture guidance for 3.0° film watching

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Computational Visual Media 2024年第3期10卷 487-503页

作者： Yi-xiao Li Guan Luo Yi-Ke Xu yu He Fang-Lue zhang Song-Hai zhang department of computer {2. and Technology Tsinghua UniversityBeijingChinaand Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijingChina Key Laboratory of Space Utilization Technology and Engineering Center for Space UtilizationChinese Academy of SciencesBeijingChina Victoria university of Wellington WellingtonNew Zealand

3.0°videos enable viewers to watch freely from different directions but inevitably prevent them from perceiving all the helpful *** mitigate this problem,picture-in-picture(PIP)guidance was proposed using preview windows to show regions of interest(ROIs)outside the current view *** identify several drawbacks of this representation and propose a new method for 3.0° film watching called *** enhances traditional PIP by adaptively arranging preview windows with changeable view ranges and *** addition,AdaPIP incorporates the advantage of arrow-based guidance by presenting circular windows with arrows attached to them to help users locate the corresponding ROIs more *** also adapted AdaPIP and Outside-In to HMD-based immersive virtual reality environments to demonstrate the usability of PIP-guided approaches beyond 2. *** user experiments on 2. screens,as well as in VR environments,indicate that AdaPIP is superior to alternative methods in terms of visual experiences while maintaining a comparable degree of immersion.

关键词： 3.0°videos picture-in-picture(PIP) virtual reality(VR) visual guidance

AFSTGCN:Prediction for multivariate time series using an adaptive fused spatial-temporal graph convolutional network

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Digital Communications and Networks 2024年第2期10卷 292-303页

作者： yuteng xiao Kaijian Xia Hongsheng Yin yu-Dong zhang Zhenjiang Qian Zhaoyang Liu yuehan Liang xiaodan Li School of Information and Control engineering China University of Mining and TechnologyXuzhou221116China department of Informatics University of LeicesterLeicesterLE17RHUK The Affiliated Changshu Hospital of Soochow university Changshu215500China School of computer science and {2. Changshu Institute of TechnologySuzhou215500China

The prediction for Multivariate Time Series(MTS)explores the interrelationships among variables at historical moments,extracts their relevant characteristics,and is widely used in finance,weather,complex industries and other ***,it is important to construct a digital twin ***,existing methods do not take full advantage of the potential properties of variables,which results in poor predicted *** this paper,we propose the Adaptive Fused Spatial-Temporal Graph Convolutional Network(AFSTGCN).First,to address the problem of the unknown spatial-temporal structure,we construct the Adaptive Fused Spatial-Temporal Graph(AFSTG)***,we fuse the spatial-temporal graph based on the interrelationship of spatial ***,we construct the adaptive adjacency matrix of the spatial-temporal graph using node embedding ***,to overcome the insufficient extraction of disordered correlation features,we construct the Adaptive Fused Spatial-Temporal Graph Convolutional(AFSTGC)*** module forces the reordering of disordered temporal,spatial and spatial-temporal dependencies into rule-like *** dynamically and synchronously acquires potential temporal,spatial and spatial-temporal correlations,thereby fully extracting rich hierarchical feature information to enhance the predicted *** on different types of MTS datasets demonstrate that the model achieves state-of-the-art single-step and multi-step performance compared with eight other deep learning models.

关键词： Adaptive adjacency matrix Digital twin Graph convolutional network Multivariate time series prediction Spatial-temporal graph

Scheduling in a Meta Search Engine by Genetic Algorithm

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Wuhan university Journal of Natural sciences 2001年第Z1期6卷 541-546页

作者： zhang wei {2., Xu Bao wen, Zhou {3. yu, Huang Hui department of computer science and engineering, Southeast university, nanjing 2.0096,china State Key Laboratory of Software engineering, Wuhan university, Wuhan 43.072.china department of computer {2. and {3. Southeast University Nanjing 210096 China

The meta search engines provide service to the users by dispensing the users' requests to the existing search engines. The existing search engines selected by meta search engine determine the searching quality. Because the performance of the existing search engines and the users' requests are changed dynamically, it is not favorable for the fixed search engines to optimize the holistic performance of the meta search engine. This paper applies the genetic algorithm (GA) to realize the scheduling strategy of agent manager in our meta search engine, GSE(general search engine), which can simulate the evolution process of living things more lively and more efficiently. By using GA, the combination of search engines can be optimized and hence the holistic performance of GSE can be improved dramatically.

关键词： WWW internet search engine meta search engine genetic algorithm agent

Overcoming Spatial Constraints in VR:A Survey of Redirected Walking Techniques

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Journal of computer science & Technology 2024年第4期39卷 841-870页

作者： Jia-Hong Liu Yang-Fu Ren Qi Wen Gan Kui Huang Fiona xiao yu Chen Er-Xia Luo Khang Yeu Tang yue-Yao Fu Cheng-wei Fan Sen-Zhe Xu Song-Hai {2. Academy of Arts and Design Tsinghua UniversityBeijing 100084China department of computer {2. and Technology Tsinghua UniversityBeijing 100084China College of computer Technology and Application Qinghai UniversityXining 810016China Zhili College Tsinghua UniversityBeijing 100084China School of computer Beijing Information Science and Technology UniversityBeijing 100192China department of Physics Tsinghua UniversityBeijing 100084China School of computer and Communication engineering University of Science and Technology BeijingBeijing 100083China

As the virtual reality(VR)technology strives to provide immersive and natural user experiences,the challenge of aligning vast virtual environments with limited physical spaces remains *** survey comprehensively explores the advancements in redirected walking(RDW)techniques aimed at overcoming spatial constraints in *** addresses this by subtly manipulating users’physical movements to allow for seamless navigation within constrained *** survey delves into gain perception mechanisms,detailing how slight discrepancies between virtual and real-world movements can be utilized without user awareness,thus extending the effective navigable *** RDW control algorithms for gain-based RDW are analyzed,highlighting their implementation and effectiveness in maintaining immersion and minimizing perceptual ***,novel methods extending beyond traditional gain-based techniques are discussed,showcasing innovative approaches that further refine VR *** practical implications of RDW in enhancing safety and reducing physical collisions in VR environments are underscored,alongside its potential to improve user experience by aligning virtual exploration more closely with natural human behavior *** a thorough review of existing literature and recent advancements,this survey provides a systematic understanding for researchers,developers,and industry *** underscores the importance of RDW in the future of VR,emphasizing RDW's role in making VR more accessible and practical across various applications,from education and training to therapy and *** paper concludes with a forward-looking perspective on the continued evolution and potential of RDW in revolutionizing virtual reality experiences.

关键词： virtual reality(VR) redirected walking(RDW) redirection gain perception

A Pricing-Based Cooperative Relay Selection Scheme for Reliable Communications

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china Communications 2024年第8期21卷 30-44页

作者： xiao yulong Wu yu Amr Tolba Chen Ziqiang Li Tengfei School of Communications and Information engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Cyber Security and Information Law Chongqing University of Posts and TelecommunicationsChongqing 400065China department of computer {2. Community CollegeKing Saud UniversityRiyadh 11437Saudi Arabia

With the rapid development and application of energy harvesting technology,it has become a prominent research area due to its significant benefits in terms of green environmental protection,convenience,and high safety and ***,the uneven energy collection and consumption among IoT devices at varying distances may lead to resource imbalance within energy harvesting networks,thereby resulting in low energy transmission *** enhance the energy transmission efficiency of IoT devices in energy harvesting,this paper focuses on the utilization of collaborative communication,along with pricing-based incentive mechanisms and auction *** propose a dynamic relay selection scheme,including a ladder pricing mechanism based on energy level and a Kuhn-Munkre Algorithm based on an auction theory employing a negotiation mechanism,to encourage more IoT devices to participate in the collaboration *** results demonstrate that the proposed algorithm outperforms traditional algorithms in terms of improving the energy efficiency of the system.

关键词： cooperative communication edge net-work energy harvesting relay selection

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基于SM2.字签名的匿名凭证协议

软件学报 2024年第7期35卷 3469-3481页

作者：赵艳琦杨晓艺冯琦禹勇西安邮电大学网络空间安全学院陕西西安710121 香港理工大学电子计算学系中国香港999077 武汉大学国家网络安全学院湖北武汉430040 陕西师范大学计算机科学学院陕西西安710119

匿名凭证作为一种隐私保护的数字身份认证技术,在认证用户数字身份有效性的同时,能够保护用户身份隐私,广泛应用于匿名身份认证、匿名通证、去中心化的数字身份管理系统等.现有的匿名凭证通常采用承诺-签名-证明的构造范式,通常要求采... 详细信息

匿名凭证作为一种隐私保护的数字身份认证技术,在认证用户数字身份有效性的同时,能够保护用户身份隐私,广泛应用于匿名身份认证、匿名通证、去中心化的数字身份管理系统等.现有的匿名凭证通常采用承诺-签名-证明的构造范式,通常要求采用的签名算法具备重随机化特性,如CL系列签名、PS系列签名及结构保持签名.现实应用中多采用ECDSA、Schnorr、SM2.数字签名进行数字身份认证,但其缺乏对用户身份隐私的保护.因此,在认证的同时,保护身份的隐私性,构造兼容ECDSA、Schnorr、SM2.数字签名的匿名凭证具有一定的现实意义.探索基于SM2.字签名构造匿名凭证协议的方法.在申请证书阶段,借助Pedersen承诺对用户属性进行承诺,同时依据SM2.名消息为H(m)的结构特点,证明Pedersen承诺消息与哈希承诺中消息的相等性.为实现这种代数结构和非代数结构陈述的等价性证明,借鉴ZKB++技术对承诺消息进行转化,进而实现跨域证明,并签发基于SM2.字签名的授权证书.在匿名凭证展示阶段,结合零知识证明技术证明持有SM2.字签名,保证了用户的匿名性.给出基于SM2.字签名的匿名凭证协议的具体构造,并进一步证明该协议的安全性.最后,通过对协议的计算复杂度分析与算法执行效率测试验证协议的有效性和可用性.

关键词： SM2 匿名凭证协议零知识证明 ZKB++

A Feedback-Based Web Search Engine

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A Feedback-Based Web Search Engine

Brain-inspired artificial intelligence research: A review

The First Conference on Web Information System and Applications

作者： zhang wei-feng, XU Bao-wen, ZHOU {3.-yu department of computer science and engineering. nanjing university of posts and Telecommunications , nanjing 210003. Jiangsu.{12. department of computer science and engineering. Southeast university. nanjing 210096, Jiangsu.{12. Jiangsu Institute of Software Quality. nanjing 210096 Jiangsu,{12. The State Key Laboratory of Software engineering. Wuhan university, Wuhan 13.072, Huhei,{12.

＜正＞ Web search engines are very useful information service tools in the Internet. The current web search engines produce search results relating to the search terms and the actual information collected by them. Since the selections of the search results cannot allcet the future ones, they may not cover most people’s interests, In this paper, feedback information produced by the users’ aceessing lists will be represented by the rough set and can reconstruct the query string and influence the search results. And thus the search engines can provide self-adaptability.

关键词： WWW srarch engine query reconstruction feedback

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science china(Technological sciences) 2024年第8期67卷 2282-2296页

作者： WANG GuoYin BAO HuaNan LIU Qun ZHOU TianGang WU Si HUANG TieJun yu ZhaoFei LU CeWu GONG YiHong zhang ZhaoXiang HE Sheng Chongqing Key Laboratory of Computational Intelligence Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Cyberspace Big Data Intelligent Security Chongqing University of Posts and TelecommunicationsChongqing 400065China College of computer and Information science Chongqing Normal UniversityChongqing 401331China State Key Laboratory of Brain and Cognitive science Institute of BiophysicsChinese Academy of SciencesBeijing 100101China School of Psychological and Cognitive sciences Peking UniversityBeijing 100871China State Key Laboratory of Multimedia Information Processing School of Computer SciencePeking UniversityBeijing 100871China department of computer {2. School of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Electronic and Information engineering Xi’an Jiaotong UniversityXi’an 710049China The Center for Research on Intelligent Perception and Computing Institute of AutomationChinese Academy of SciencesBeijing 100190China Institute of Biophysics Chinese Academy of SciencesBeijing 100101China

Artificial intelligence(AI) systems surpass certain human intelligence abilities in a statistical sense as a whole, but are not yet the true realization of these human intelligence abilities and behaviors. There are differences, and even contradictions, between the cognition and behavior of AI systems and humans. With the goal of achieving general AI, this study contains a review of the role of cognitive science in inspiring the development of the three mainstream academic branches of AI based on the three-layer framework proposed by David Marr, and the limitations of the current development of AI are explored and analyzed. The differences and inconsistencies between the cognition mechanisms of the human brain and the computation mechanisms of AI systems are analyzed. They are found to be the cause of the differences and contradictions between the cognition and behavior of AI systems and humans. Additionally, eight important research directions and their scientific issues that need to focus on braininspired AI research are proposed: highly imitated bionic information processing, a large-scale deep learning model that balances structure and function, multi-granularity joint problem solving bidirectionally driven by data and knowledge, AI models that simulate specific brain structures, a collaborative processing mechanism with the physical separation of perceptual processing and interpretive analysis, embodied intelligence that integrates the brain cognitive mechanism and AI computation mechanisms,intelligence simulation from individual intelligence to group intelligence(social intelligence), and AI-assisted brain cognitive intelligence.

关键词： artificial intelligence cognitive science brain science intelligence science large language model