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Robust QKD-based private database queries based on alternative sequences of single-qubit measurements

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Science China(Physics,Mechanics & Astronomy) 2017年第12期60卷 1-11页

作者： YuGuang Yang ZhiChao Liu XiuBo Chen YiHua Zhou weimin shi Faculty of Information Technology Beijing University of Technology Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Quantum channel noise may cause the user to obtain a wrong answer and thus misunderstand the database holder for existing QKD-based quantum private query(QPQ) protocols. In addition, an outside attacker may conceal his attack by exploiting the channel noise. We propose a new, robust QPQ protocol based on four-qubit decoherence-free(DF) states. In contrast to existing QPQ protocols against channel noise, only an alternative fixed sequence of single-qubit measurements is needed by the user(Alice) to measure the received DF states. This property makes it easy to implement the proposed protocol by exploiting current technologies. Moreover, to retain the advantage of flexible database queries, we reconstruct Alice's measurement operators so that Alice needs only conditioned sequences of single-qubit measurements.

关键词： quantum cryptography quantum private query decoherence-free states collective noise

3D scene graph prediction from point clouds

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Virtual Reality & Intelligent Hardware 2022年第1期4卷 76-88页

作者： Fanfan WU Feihu YAN weimin shi Zhong ZHOU State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBeihang UniversityBeijing 100191China

Background In this study,we propose a novel 3D scene graph prediction approach for scene understanding from point *** It can automatically organize the entities of a scene in a graph,where objects are nodes and their relationships are modeled as *** specifically,we employ the DGCNN to capture the features of objects and their relationships in the scene.A Graph Attention Network(GAT)is introduced to exploit latent features obtained from the initial estimation to further refine the object arrangement in the graph structure.A one loss function modified from cross entropy with a variable weight is proposed to solve the multi-category problem in the prediction of object and *** Experiments reveal that the proposed approach performs favorably against the state-of-the-art methods in terms of predicate classification and relationship prediction and achieves comparable performance on object classification *** The 3D scene graph prediction approach can form an abstract description of the scene space from point clouds.

关键词： Scene understanding 3D scene graph Point cloud DGCNN GAT

Improving the efficiency of quantum hash function by dense coding of coin operators in discrete-time quantum walk

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Science China(Physics,Mechanics & Astronomy) 2018年第3期61卷 18-25页

作者： YuGuang Yang YuChen Zhang Gang Xu XiuBo Chen Yi-Hua Zhou weimin shi Faculty of Information Technology Beijing University of Technology Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Li et al. first proposed a quantum hash function(QHF) in a quantum-walk architecture. In their scheme, two two-particle interactions, i.e., I interaction and π-phase interaction are introduced and the choice of I or π-phase interactions at each iteration depends on a message bit. In this paper, we propose an efficient QHF by dense coding of coin operators in discrete-time quantum walk. Compared with existing QHFs, our protocol has the following advantages: the efficiency of the QHF can be doubled and even more; only one particle is enough and two-particle interactions are unnecessary so that quantum resources are saved. It is a clue to apply the dense coding technique to quantum cryptographic protocols, especially to the applications with restricted quantum resources.

关键词： quantum cryptography quantum walk discrete-time quantum walk collision birthday attack

A Restricted Quantum Deniable Authentication Protocol Based on GHZ States

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Chinese Journal of Electronics 2018年第2期27卷 229-233页

作者： shi weimin WANG Yanmei LI Leilei ZHOU Yihua YANG Yuguang JIANG Nan College of Computer Science and Technology Beijing University of Technology College of Computer Science and Technology Beijing University of Posts and Telecommunications

Utilizing the property of unitary transformation and Greenberger-Horne-Zeilinger(GHZ) states,a restricted quantum deniable authentication protocol is proposed. The protocol can provide that the sender can deny the content of the sent message, but cannot deny taking part in a certain communication. Security analysis results show that this protocol can satisfy known key security and the basic security requirements of restricted deniable authentication protocol such as completeness, restricted deniability, no-counterfeiting and can withstand impersonation attack, intercept-resend attack.

关键词： Quantum deniable authentication Restricted Greenberger-Horne-Zeilinger(GHZ) states

Quantum network communication: a discrete-time quantum-walk approach

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Science China(Information Sciences) 2018年第4期61卷 199-208页

作者： Yuguang YANG Jiajie YANG Yihua ZHOU weimin shi Xiubo CHEN Jian LI Huijuan ZUO Faculty of Information Technology Beijing University of Technology State Key Laboratory of Information Security (Institute of Information Engineering Chinese Academy of Sciences) Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications School of Computer Beijing University of Posts and Telecommunications College of Mathematics and Information Science Hebei Normal University

We study the problem of quantum multi-unicast communication over the butterfly network in a quantum-walk architecture, where multiple arbitrary single-qubit states are transmitted simultaneously between multiple source-sink pairs. Here, by introducing quantum walks, we demonstrate a quantum multiunicast communication scheme over the butterfly network and the inverted crown network, respectively,where the arbitrary single-qubit states can be efficiently transferred with both the probability and the state fidelity one. The presented result concerns only the butterfly network and the inverted crown network, but our techniques can be applied to a more general graph. It paves a way to combine quantum computation and quantum network communication.

关键词： network coding quantum network coding quantum walk state fidelity butterfly network inverted crown network

AstragalosideⅣimproves melanocyte differentiation from mouse bone marrow mesenchymal stem cells

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BIOCELL 2021年第6期45卷 1551-1559页

作者： XINGYU MEI ZHOUWEI WU CHENGZHONG ZHANG YUE SUN weimin shi Department of Dermatology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai200080China.

Vitiligo results in an autoimmune disorder destructing skin pigment cells,melanocytes(Mcs).This study aimed to investigate whether Astragaloside IV(AIV)could efficiently induce differentiation of bone marrow mesenchymal stem cells(BMMSCs)into *** were induced and differentiated into Mcs with 0.1,0.2,and 0.4 mg/L AIV during *** changes of differentiated cells were *** of some melanocytic specific genes(TRP-1,TRP-2,MART-1,Mitf)were measured with quantitative polymerase chain reaction(qPCR)at 90,120,and 150 days of *** 90-day induction,the differentiated cells with 0.4 mg/L AIV demonstrated the typical morphology of Mcs,positive 3,4 dihydroxyphenylalanine staining,and positive staining of TRP-1,TRP-2,MART-1,and *** 90-and 120-days’induction with 0.4 mg/L AIV,TRP-1 expression was significantly elevated(p0.05)and 0.2 mg/L(p>0.05)AIV-treated *** 90 to 150-day induction,there were no significant differences for Mitf levels between AIV-treated groups and negative control(p>0.05).In conclusion,90-day induction with 0.4 mg/L AIV up-regulated TRP-1,TRP-2,and MART-1 expression,indicating that AIV can efficiently induce Mcs differentiation from *** results provide experimental and theoretic evidence for AIV application in clinical vitiligo repigmentation treatment.

关键词： Tyrosinase-related protein Melanoma antigen recognized by T cells 1 Microphthalmia-associated transcription factor Committed differentiation Traditional Chinese medicine

Synthesis of β,β＇-Porphyrin Dimer Linked by Vinylene

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Chinese Journal of Chemistry 2012年第2期30卷 405-408页

作者： Jiang,Xuliang Li,Panli Wang,Yucheng Shen,Qi Tao,Jingchao shi,weimin Department of Chemistry Zhengzhou UniversityNew Drug Research&Development CenterZhengzhou UniversityZhengzhouHenan 450052China

Synthesis of a novel β,β＇-tetraalkylporphyrin dimer linked by vinylene was discribed, in which the dimer was readily prepared from a porphyrin-derived Wittig reagent and a mono-formylated porphyrin via Wittig react... 详细信息

关键词： synthesis tetrapropylporphyrin dimer Wittig reaction vinylene

Bipartite consensus of descriptor multi-agent systems via adaptive control 36

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Bipartite consensus of descriptor multi-agent systems via ad...

Spatial and temporal distributions of nitrogen,phosphorus and heavy metals in the intertidal sediment of the Chang jiang River Estuary in China

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作者： shi weimin CUI Yulong CHEN Wenhai GAO Lixin Institute of Intelligent Systems and Decision Wenzhou University

ISBN: (纸本)9781538629185

The bipartite consensus problem of descriptor multi-agent systems with continuous-time linear dynamics and Lipschitiz nonhnearity is considered in this *** interaction topology is assumed an undirect signed *** on the general Riccati equation,a distribute adaptive protocol is presented to solve the bipartite consensus *** sufficient consensus conditions are established to guarantee the descriptor multi-agent system achieves ***,we also investigated the descriptor systems with nonhnearity dynamics due to its application in real ***,the consensus adaptive protocol is ***,a simulation example is provided to illustrate the obtained results.

关键词： Multi-agent system Descriptor systems Bipartite Consensus Distributed control Adaptive control

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Acta Oceanologica Sinica 2010年第1期29卷 108-115页

作者： QUAN weimin shi Liyan HAN Jindi PING Xianyin SHEN Anglv CHEN Yaqu Key and Open Laboratory of Marine and Estuarine Fishery of Ministry of Agriculture East China Sea Fishery Research Institute Chinese Academy of Fishery Science Shanghai 200090 China

Spatial and temporal distributions of nutrients （N and P） and heavy metals （Cu, Zn, Pb and Cd） in the intertidal sediments at Dongtan wetland of the Changjiang River （Yangtze River） Estuary were examined by laying one transect running seaward to landward during January, April, June, August and October of 2005. Total nitrogen （TN） and heavy metal concentrations in the intertidal sediment showed an increasing trend from open bare flat to the high marsh, with the maximum concentrations in the high marsh and the minimum values in open bare flat. In contrast, sediment total phosphorus （TP） concentrations changed little among sampling sites. One-way ANOVA found that there were significantly temporal variations of nutrients and heavy metals concentrations in the intertidal sediment （P 〈0.05）. The concentrations of heavy metals generally showed an increasing trend from January to October. As compared with other large estuaries, heavy metal contamination in the intertidal sediment of the Changjiang River Estuary was relatively low.

关键词： heavy metals nutrients intertidal Changjiang River Estuary contamination