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Attribute-Based Encryption for Circuits on Lattices

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Tsinghua Science and Technology 2014年第5期19卷 463-469页

作者： Jian Zhao Haiying Gao junqi zhang PLA Information Engineering University

In the previous construction of attributed-based encryption for circuits on lattices, the secret key size was exponential to the number of AND gates of the circuit. Therefore, it was suitable for the shallow circuits whose depth is bounded. For decreasing the key size of previous scheme, combining the techniques of Two-to-One Recoding （TOR）, and sampling on lattices, we propose a new Key-Policy Attribute-Based Encryption （KP-ABE） scheme for circuits of any arbitrary polynomial on lattices, and prove that the scheme is secure against chosen plaintext attack in the selective model under the Learning With Errors （LWE） assumptions. In our scheme, the key size is proportional to the number of gates or wires in the circuits.

关键词： attribute-based encryption lattice Learning With Errors (LWE) circuits

Combined and interactive effects of interference fit and preloads on composite joints

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Chinese Journal of Aeronautics 2014年第3期27卷 716-729页

作者： Liu Longquan zhang junqi Chen Kunkun Wang Hai School of Aeronautics and Astronautics Shanghai Jiao Tong University

The combined and interactive effects of the bolt-hole fit conditions and the preloads of the fasteners on the load carrying capacity of single-lap composite-to-titanium bolted joints have been investigated both experimentally and numerically. Quasi-static tests of the hybrid joints with different fit conditions are implemented, and a three dimensional finite element progressive failure analysis model is proposed to predict the influences of the bolt-hole fit conditions and fastener＇s pre- loads on the mechanical behaviors of the joints. Based on the experimental validated simulation method, a multi-factor, mixed levels orthogonal design table and the analysis of variance method are used to arrange the simulation conditions and to further study the interactive effects of preloads and fit conditions. Through the analysis of the results, for the researched double bolt, single-lap composite-titanium joints, it is found that： the effects of both the interference fit and the preloads change from positive into negative mode with the increase of the interference fit values or preload values; appropriate bolt-hole fit conditions and preloads can improve the bolt-hole contact conditions of the loaded joints, and then retard the fiber failures around the fastener holes, and increase the load carrying capacity of the joints eventually; the interactive effect of the bolt-hole interference fit conditions and preloads cannot be ignored and the parameters need to be considered together and synthetically as the joints are being optimized.

关键词： Bolted joints Composite Interactive effect Interference fit Preloads

A Method for Predicting Service Deprecation in Service Systems

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Tsinghua Science and Technology 2017年第1期22卷 52-61页

作者： Bofei Xia Yushun Fan Cheng Wu Bing Bai junqi zhang Department of Automation Tsinghua UniversityBeijing 100084 China

An increasing number of web services are being invoked by users to create user applications（e.g.,mashups）. However, over time, a few good services in service systems have become deprecated, i.e., the service is initially available and is invoked by service users, but later becomes unavailable. Therefore, the prediction of service deprecation has become a key issue in creating reliable long-term user applications. Most existing research has overlooked service deprecation in service systems and has failed to consider long-term service reliability when making service recommendations. In this paper, we propose a method for predicting service deprecation, which comprises two components： Service Comprehensive Feature Modeling（SCFM） for extracting service features relevant to service deprecation and Deprecated Service Prediction（DSP） for building a service deprecation prediction model. Our experimental results on a real-world dataset demonstrate that our method yields an improved Area-Under-the-Curve（AUC） value over existing methods and thus has better accuracy in service deprecation prediction.

关键词： web service service deprecation predict Latent Dirichlet Allocation(LDA) extreme learning machine

Attenuated inhibition of medium spiny neurons participates in the pathogenesis of childhood depression

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Neural Regeneration Research 2014年第10期9卷 1079-1088页

作者： Dan Liu Linghan Hu junqi zhang Ping zhang Shengtian Li Bio-X Institutes Shanghai Jiao Tong University

Accumulating evidence suggests that the nucleus accumbens, which is involved in mechanisms of reward and addiction, plays a role in the pathogenesis of depression and in the action of anti-depressants. In the current study, intraperitoneal injection of nomifensine, a dopamine reuptake inhibitor, decreased depression-like behaviors in the Wistar Kyoto rat model of depression in the sucrose-preference and forced swim tests. Nomifensine also reduced membrane excitability in medium spiny neurons in the core of the nucleus accumbens in the childhood Wistar Kyoto rats as evaluated by electrophysiological recording. In addition, the expression of dopamine D2-like receptor mRNA was downregulated in the nucleus accumbens, striatum and hippocampus of nomifensine-treated childhood Wistar Kyoto rats. These experimental ifndings indicate that impaired inhibition of medium spiny neurons, mediated by dopamine D2-like receptors, may be involved in the formation of depression-like behavior in childhood Wistar Kyoto rats, and that nomifensine can alleviate depressive behaviors by reducing medium spiny neuron membrane excitability.

关键词： nerve regeneration brain injury neurophysiology MSNs dopamine D2-like receptors childhood depression Wistar Kyoto rats nucleus accumbens excitatory inhibition neural plasticity nomifensine NSFC grant neural regeneration

Novel TiC/Ti Open Cellular Foams Prepared by a Modified Sponge-coating Method Using High Frequency Induction Heating Process

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Journal of Materials Science & Technology 2013年第4期29卷 339-343页

作者： Yong Gao Xingxiang Xu Zhenming Yang junqi zhang Chunhai Jiang Jinsong zhang Institute of Metal Research Chinese Academy of Sciences

A new kind of open cellular foam material with three dimensionally interconnected TiC/Ti struts was prepared by a two-step sponge-coating and high frequency induction heating process. The microstructure, composition and compression strength of the prepared TiC/Ti foam materials were characterized. It was confirmed that the incorporation of Ti into TiC resulted in an inter-bonded Ti-TiC-Ti layered structure in the struts, which enhanced the plasticity of the composite foam materials.

关键词： TiC/Ti foams Composite Sintering Porosity Mechanical properties

Numerical simulation of a thermal-bubble actuated diffuser-nozzle valveless pump

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Science China(Technological Sciences) 2009年第10期52卷 2967-2972页

作者： PAN LiangMing DENG JieWen YUAN DeWen CHEN DeQi zhang junqi School of Power Engineering Chongqing UniversityChongqing 400044China

A valveless micropump actuated by thermal bubbles which are generated by an electrode heater mounted with a pair of diffuser nozzles has been numerically studied by commercial CFD software FLUENT. The relationships between the net flow rate and the superheating and heat supplying frequency have been investigated. The depth of the diffuser-nozzle micropump is 200 μm, the diameter of the actuating chamber is 1 mm, and a pair of diffuser nozzles whose gap has been expanded from 30 μm to 274 μm with an open angle of 7° are connected to the actuating chamber. The working fluid is methanol. In the numerical simulation, the flow pattern is laminar. The results show that the pump has different optimal driving frequencies at different superheating. A cycle resulting from bubble growth and shrinking costs more time at higher superheating temperature; different superheating has different optimal driving frequency; when the superheating increases, the maximum volume flow rate and the maximum pump pressure will increase simultaneously, and the optimal driving frequency decreases as well, the maximum volume flow rate and pump pressure also have the same tendency; in the condition of uncontrolled condensing, the bubble shrinking process is longer than the growth process, thus it is the determining factor to affect the pump performance. The maximum volume flow rate is 9.02 μL/min at ΔT = 15°C, and the maximum pump pressure is 680 Pa. With the increase of wall superheat, cycle including the bubble growth and condensation will become longer, resulting in a significant impact on the pumping flow; different wall superheat has different optimized frequency, increasing superheat will bring increased pumping flow and pump pressure, the optimized driving frequency will be reduced; liquid supply phase is longer than pumping phase.

关键词： thermal bubble actuating valveless diffuser-nozzle micropump numerical simulation

Systematic Full-Cycle Engineering Microbial Biofilms to Boost Electricity Production in Shewanella oneidensis

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Research 2023年第2期2023卷 361-378页

作者： Feng Li Rui Tang Baocai zhang Chunxiao Qiao Huan Yu Qijing Liu junqi zhang Liang Shi Hao Song Frontiers Science Center for Synthetic Biology(Ministry of Education) and Key Laboratory of Systems BioengineeringTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Department of Biological Sciences and Technology School of Environmental StudiesChina University of Geoscience in WuhanWuhanHubei 430074China

Electroactive biofilm plays a crucial rule in the electron transfer efficiency of microbial electrochemical systems(MES).However,the low ability to form biofilm and the low conductivity of the formed biofilm substanti... 详细信息

关键词： limit conductivity transfer

Microbial electro-fermentation for synthesis of chemicals and biofuels driven by bi-directional extracellular electron transfer

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Synthetic and Systems Biotechnology 2020年第4期5卷 304-313页

作者： Ziying Gong Huan Yu junqi zhang Feng Li Hao Song Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China

Electroactive bacteria could perform bi-directional extracellular electron transfer(EET)to exchange electrons and energy with extracellular environments,thus playing a central role in microbial electro-fermentation(EF)*** fermentation and microbial electrosynthesis are the main pathways to produce value-added chemicals and ***,the low efficiency of the bi-directional EET is a dominating bottleneck in these *** this review,we firstly demonstrate the main bi-directional EET mechanisms during EF,including the direct EET and the shuttle-mediated ***,we review representative milestones and progresses in unbalanced fermentation via anode outward EET and microbial electrosynthesis via inward EET based on these two EET mechanisms in ***,we summarize the main synthetic biology strategies in improving the bi-directional EET and target products synthesis,thus to enhance the efficiencies in unbalanced fermentation and microbial ***,a perspective on the applications of microbial electro-fermentation is provided.

关键词： Unbalanced fermentation Microbial electrosynthesis Extracellular electron transfer Synthetic biology

The ANIP1-OsWRKY62 module regulates both basal defense and Pi9-mediated immunity against Magnaporthe oryzae in rice

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Molecular Plant 2023年第4期16卷 739-755页

作者： Xuetao Shi Yehui Xiong Kai zhang Yinshan zhang junqi zhang Lili zhang Yutao Xiao Guo-Liang Wang Wende Liu State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBejing 100193China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricutural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Department of Plant Pathology The Ohio State UniversityColumbusOH 43210USA

During effector-triggered immunity(ETI)against the devastating rice blast pathogen Magnaporthe oryzae,Pi9 functions as an intracellular resistance protein sensing the pathogen-secreted effector AvrPi9 in ***,the underlying recognition mechanism(s)between Pi9 and AvrPi9 remains *** this study,We identified a rice ubiquitin-like domain-containing protein(UDP),AVRPI9-INTERACTING PROTEIN 1(ANP1),which is directly targeted by AvrPi9 and also binds to Pi9 in *** analysis of anip1 mu-tants and plants overexpressing ANIP1 revealed that ANIP1 negatively modulates rice basal defense against ***1 undergoes 26S proteasome-mediated degradation,which can be blocked by both AvrPi9 and ***,ANIP1 physically associates with the rice WRKY transcription factor OsWRKY62,which also interacts with AvrPi9 and Pi9 in *** the absence of Pi9,ANIP1 negatively regulates OsWRKY62 abundance,which can be promoted by ***,knocking out of OsWRKY62 in a non-Pi9 back-ground decreased immunity against ***,we also observed that OsWRKY62 plays negative roles in defense against a compatible *** strain in Pi9-harboring ***9 binds to ANiP1 and OsWRKY62 to form a complex,which may help to keep Pi9 in an inactive state and weaken rice ***,using competitive binding assays,we showed that AvrPi9 promotes Pi9 dissociation from ANiP1,which could be an important step toward ETI *** together,our results reveal an immune strategy whereby a UDP-WRKY module,targeted by a fungal effector,modulates rice immunity in distinct ways in the presence or absence of the corresponding resistance protein.

关键词： AvrPi9 ANIP1 OsWRKY62 Pi9 rice blast disease immunity