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Novel way to research nonlinear feedback shift register

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Science China(Information Sciences) 2014年第9期57卷 161-174页

作者： zhao DaWei PENG HaiPeng LI LiXiang HUI SiLi yang yixian Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications Zhejiang Provincial Key Lab of Data Storage and Transmission Technology Hangzhou Dianzi University National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Shandong Provincial Key Laboratory of Computer Network Shandong Computer Science Center

In this paper,we regard the nonlinear feedback shift register(NLFSR)as a special Boolean network,and use semi-tensor product of matrices and matrix expression of logic to convert the dynamic equations of NLFSR into an equivalent algebraic *** on them,we propose some novel and generalized techniques to study ***,a general method is presented to solve an open problem of how to obtain the properties(the number of fixed points and the cycles with different lengths)of the state sequences produced by a given NLFSR,i.e.,the analysis of a given *** then show how to construct all 22n-(l-n)/22n-lshortest n-stage feedback shift registers(nFSR)and at least 22n-(l-n)-1/22n-l-1shortest n-stage nonlinear feedback shift registers(nNLFSR)which can output a given nonperiodic/periodic sequence with length ***,we propose two novel cycles joining algorithms for the construction of full-length ***,two algorithms are presented to construct 22n-2-1different full-length nNLFSRs,respectively.

关键词： nonlinear feedback shift register semi-tensor product Boolean network full-length nNLFSR binary sequence

Verifiable Multi-Party Universal Blind Quantum Computing in Distributed Networks

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Chinese Journal of Electronics 2021年第4期30卷 712-718页

作者： SHAN Ruiting CHEN Xiubo XU Gang DOU zhao LI Zongpeng MIAO Lihua yang yixian Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications School of Information Science and Technology North China University of Technology Huawei Technologies Co.Ltd School of Computer Science Wuhan University

Blind quantum computing(BQC) ensures that a classical client could delegate complex computing tasks to a remote quantum server safely. In order to detect the dishonest behavior of the participants, we present a verifiable multi-party universal BQC protocol in distributed networks. By using the stabilizer formalism, we propose an honesty check method to test the correctness of the graph states generated by the servers. The honesty of both the clients and the servers can be judged fairly with the help of the arbitrator. Moreover, a load balancer is introduced to control the possible breakdown of servers in the network. No-signaling principle ensures the unconditional security of the protocol. Through the use of universal resource states, our protocol can be applied in more multi-party verifiable universal BQC *** failure management and workload balancing of the protocol also provide a promising prospect for the future BQC network.

关键词： Blind quantum computing(BQC) Verifiability Failure management Load balancer Distributed networks

Consensus algorithm for medical data storage and sharing based on master–slave multi-chain of alliance chain

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High-Confidence Computing 2023年第3期3卷 12-21页

作者： yixian Zhang Feng zhao School of Information and Communication Guilin University of Electronic TechnologyGuilin 541004China School of Artificial Intelligence and Information Engineering Guangxi Electrical Polytechnic InstituteNanning 530299China

The safe storage and sharing of medical data have promoted the development of the public medical *** the same time,blockchain technology guarantees the safe storage and sharing of medical ***,the consensus algorithm in the current medical blockchain cannot meet the requirements of low delay and high throughput in the large-scale network,and the identity of the primary node is exposed and vulnerable to ***,this paper proposes an efficient consensus algorithm for medical data storage and sharing based on a master–slave multi-chain of alliance chain(ECA_MDSS).Firstly,institutional nodes in the healthcare alliance chain are clustered according to geographical location and medical system structure to form a multi-zones *** system adopts master–slave multi-chain architecture to ensure security,and each zone processes transactions in parallel to improve consensus ***,the aggregation signature is used to improve the practical Byzantine fault-tolerant(PBFT)consensus to reduce the communication interaction of consensus in each ***,an efficient ring signature is used to ensure the anonymity and privacy of the primary node in each zone and to prevent adaptive ***,a trust model is introduced to evaluate the trust degree of the node to reduce the evil done by malicious *** experimental results show that ECA_MDSS can effectively reduce communication overhead and consensus delay,improve transaction throughput,and enhance system scalability.

关键词： Alliance chain Master-slave multi-chain Consensus algorithm Aggregation signature Ring signature Trust value

Constructing the three-qudit unextendible product bases with strong nonlocality

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Chinese Physics B 2022年第6期31卷 170-182页

作者： Bichen Che zhao Dou Xiubo Chen Yu yang Jian Li yixian yang Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing 100876China Information Security Center Beijing University of Posts and TelecommunicationsBeijing 100876China

Unextendible product bases(UPBs)are interesting members of a family of orthogonal product ***,we investigate the construction of 3-qudit UPBs with strong ***,a UPB set in C^(3)■C^(3)■C^(3)of size 19 is presented based on the shift *** mapping the system to a Rubik’s cube,we provide a general method of constructing UPBs in C^(d)■C^(d)■C^(d)of size(d-1)^(3)+2d+5,whose corresponding Rubik’s cube is composed of four ***,for the more general case where the dimensions of parties are different,we extend the classical tile structure to the 3-qudit system and propose the tri-tile *** means of this structure,a C^(4)■C^(4)■C^(5)system of size 38 is obtained based on a C^(3)■C^(3)■C^(4)system of size ***,we generalize this approach to the C^(d1)■C^(d2)■C^(d3)system which also consists of four *** research provides a positive answer to the open question raised in by Halder et al.[***.122040403(2019)],indicating that there do exist UPBs that can exhibit strong quantum nonlocality without entanglement.

关键词： strong nonlocality unextendible product bases tri-tile structure construction method

Temperature is a cryptic factor shaping the geographical pattern of genetic variation in Ceratophyllum demersum across a subtropical freshwater lake

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Plant Diversity 2024年第5期46卷 630-639页

作者： yixian Li Xuyao zhao Manli Xia Xinzeng Wei Hongwei Hou The State Key Laboratory of Freshwater Ecology and Biotechnology The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of SciencesInstitute of HydrobiologyChinese Academy of SciencesWuhan 430072HubeiChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074HubeiChina

Macrophyte habitats exhibit remarkable heterogeneity,encompassing the spatial variation of abiotic and biotic components such as changes in water conditions and weather as well as anthropogenic *** factors are thought to be important drivers shaping the genetic and epigenetic variation of aquatic ***,the links among genetic diversity,epigenetic variation,and environmental variables remain largely unclear,especially for clonal aquatic ***,we performed population genetic and epigenetic analyses in conjunction with habitat discrimination to elucidate the environmental factors driving intraspecies genetic and epigenetic variation in hornwort(Ceratophyllum demersum)in a subtropical *** factors were highly correlated with the genetic and epigenetic variation of ***,with temperature being a key driver of the genetic *** temperature was detected to be correlated with greater genetic and epigenetic *** and epigenetic variation were positively driven by water temperature,but were negatively affected by ambient air *** findings indicate that the genetic and epigenetic variation of this clonal aquatic herb is not related to the geographic feature but is instead driven by environmental conditions,and demonstrate the effects of temperature on local genetic and epigenetic variation in aquatic systems.

关键词： Genetic diversity Epigenetic variation Temperature Macrophyte Restoration

Anchoring mechanical characteristics of Ductile-Expansion bolt

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International Journal of Mining Science and Technology 2024年第8期34卷 1115-1134页

作者： Yu Chen Wang Liu Linchong Huang Hang Lin yixian Wang Yanlin zhao Cungang Lin State Key Laboratory for Tunnel Engineering Guangzhou 510275China Guangdong Research Center for Underground Space Exploitation Technology Guangdong Key Laboratory of Marine Civil EngineeringSchool of Civil EngineeringSun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China School of Resources and Safety Engineering Central South UniversityChangsha 410083China School of Civil Engineering Hefei University of TechnologyHefei 230009China School of Energy and Safety Engineering Hunan University of Science and TechnologyXiangtan 411201China

The application of ductile rock bolts has been a crucial method for solving the problems of large deformations,energy absorption and stability control issues in deep rock *** study the anchoring mechanism of the key expansive structure,this paper proposes a novel type of bolt—the Ductile-Expansion bolt,and conducts research on anchoring mechanics,energy absorption characteristics,and failure modes of the *** addition,this paper defines the concept of load-volume ratio of metal rock bolts and proves the Ductile-Expansion bolt is capable of better improving the unit volume bearing capacity of the bolt ***,laboratory and field tests verify the Ductile-Expansion bolt had better anchoring effect than the traditional rebar bolt,with the expansion structure favorably enhancing the ductility and energy absorption performance of the ***,this paper microscopically analyzes the crack propagation and distribution morphology of the bolts by establishing a 3D coupled numerical model based on *** results illustrate the interface at the variable diameter of the Ductile-Expansion bolt serves as the transition zone between high and low stress *** expansion structure can impose radial compression on the medium around the bolt,which can improve the bolt anchorage performance.

关键词： Ductile-Expansion bolt Pull-out test Peak load Anchoring mechanical characteristics

Highly efficient fluoride removal from water using 2D metal-organic frameworks MIL-53(Al)with rich Al and O adsorptive centers

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Environmental Science and Ecotechnology 2021年第4期8卷 31-40页

作者： Lei Huang Zhihui yang Sikpaam Issaka Alhassan Zhixuan Luo Baocheng Song Linfeng Jin yixian zhao Haiying Wang School of Metallurgy and Environment Central South UniversityChangsha410083PR China Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution Changsha410083PR China School of Environmental Science and Engineering Guangzhou UniversityGuangzhou510006China Fujian Environmental Protection Design Institute Co.Ltd Fuzhou350000PR China School of Material Science and Engineering Central South UniversityChangsha410083PR China

In this study,metal-organic framework MIL-53(Al)was synthesized and studied to understand the different mechanisms between normal MIL-53(Al)and 2D metal-organic framework MIL-53(Al)for removing ***,the 2D MIL-53(Al)had two-dimensional linear morphology rather than block shape,indicating more expose adsorptive sites than normal MIL-53(Al).The batch adsorption experiments were applied to investigate the performance of 2D MIL-53(Al),including pH,adsorption kinetics,and *** 2D MIL-53(Al)(75.50 mg/g)showed better adsorption capacity than normal MIL-53(Al)(35.63 mg/g).The adsorption process of 2D MIL-53(Al)followed the pseudo-firstorder model and Langmuir *** adsorption mechanism of this material was further studied by using experimental characterization and density functional theory calculations in *** main adsorptive sites were Al and O in the 2D MIL-53(Al),and the relationship between fluoride binding with Al and O was HF^(-)_(2)>HF>F^(-).The species of fluoride were HF2,HF,F at different pH and ***,this study provides a significant way on the application of two-dimensional materials for removing fluoride.

关键词： Two dimensions Metal-organic frameworks MIL-53(Al) Fluoride Adsorption

Geochemistry of Alkali-rich Igneous Rocks of Northern Xinjiang and Its Implications for Geodynamics

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 321-328页

作者： zhao Zhenhua BAI Zhenghua XIONG Xiaolin MEI Houjun WANG yixian Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640

Five nearly E-W-trending alkali-rich igneous rock belts are distributed from north to south in northern Xinjiang, and they are composed mainly of riebeckite, K-feldspar granite and high-K and medium-K calc-alkaline volcanic rocks and shoshonite. They were mainly emplaced or erupted between the Carboniferous and Permian. The compositions of Sr, Nd, Pb, and O isotopes imply that their principal resource materials are derived from the upper mantle or juvenile crust, indicating obvious continental growth in the Phanerozoic. The trace element association implies that their tectonic settings are within plate and volcanic arc for alkali-rich granites, and post-collisional are, late oceanic are and continental are for alkali-rich volcanic rocks. An archipelago model was suggested for the tectonic evolution in northern Xinjiang. It can be named the central-Asia-type orogeny, which is different from the so called circum-Pacific ocean-continent-type tectonics or the Alpine-Himalayan continent-continent-collisional orogeny.

关键词： Alkali-rich igneous rocks geochemistry crustal growth Xinjiang

BLOCKCHAIN TECHNOLOGIES AND APPLICATIONS

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China Communications 2019年第6期16卷 I0004-I0006页

作者： Erwu Liu Alex“Sandy”Pentland Greg Adamson Ramesh Ramadoss yixian yang Wei-Tek Tsai Yunlei zhao Min Lei Tongji University Tongji-ARM AI Innovation Labs the local group development of the IEEE Blockchain Initiative in China the IEEE Shanghai Blockchain Group the U.S.National Academy of Engineering the World Economic Forum Cyber Security at the University of Melbourne School of Engineering Standards Australia blockchain standards technical committee IEEE Blockchain Initiative the IEEE Blockchain Standards Committee the IEEE P2418.1 Blockchain Standards Working Group Information Security Center Beijing University of Posts and Telecommunications Beihang University School of Computer Science Fudan University the School of Cyberspace Security Beijing University of Posts and Telecommunications

Blockchain is a technology that uses community validation to synchronize the content of ledgers replicated by multiple *** Blockchain derives its origins from technologies introduced decades ago,recently it has received an astonishing amount of attention in both academic and industry due to its charac-teristics of decentralization,point-to-point transmission,transparency,traceability,non-tampering,and data *** researchers and practitioners have recognized that Blockchain can be used to solve complex technical or socio-economic problems.

关键词： Blockchain ledgers replicated multiple users