检索结果-南通市图书馆

Topological Equivalence Theorem and Double-Copy for Chern-Simons Scattering Amplitudes

在线全文

学校读者我要写书评

暂无评论

Research 2023年第2期2023卷 43-51页

作者： Yan-Feng Hang Hong-Jjan He cong shen Tsung-Dao Lee Institute and School of Physics and Astronomy Key Laboratory for Particle Astrophysics and Cosmology(MOE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai Jiao Tong UniversityShanghaiChina Department of Physics and Institute of Modern Physics Tsinghua UniversityBejingChina Center for High Energy Physics Peking UniversityBeijingChina Fields and Strings Laboratory Institute of PhysicsEcole Polytechnique Federale de LausanneLausanneSwitzerland

We study the mechanism of topological mass generation for 3-dimensional Chern-Simons gauge theories and propose a brand-new topological equivalence theorem to connect scattering amplitudes of the physical gauge boson ... 详细信息

关键词： expansion gauge topological

New results on multilevel diversity coding with secure regeneration

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2018年第10期61卷 130-143页

作者： Shuo SHAO Tie LIU Chao TIAN cong shen Department of Electrical Engineering Shanghai Jiaotong University Department of Electrical Engineering Texas A&M University School of Information Science and Technology University of Science & Technology of China

The problem of multilevel diversity coding with secure regeneration is revisited. Under the assumption that the eavesdropper can access the repair data for all compromised storage nodes, Shao et *** a precise characterization of the minimum-bandwidth-regeneration(MBR) point of the achievable normalized storage-capacity repair-bandwidth tradeoff region. In this paper, it is shown that the MBR point of the achievable normalized storage-capacity repair-bandwidth tradeoff region remains the same even if we assume that the eavesdropper can access the repair data for some compromised storage nodes(defined as the type II compromised nodes) but only the data contents of the remaining compromised nodes(defined as the type I compromised nodes), as long as the number of type I compromised nodes is no greater than that of type II compromised nodes.

关键词： distributed storage regenerating code exact repair secrecy constraint MBR point

Strict pattern matching under non-overlapping condition

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2017年第1期60卷 5-20页

作者： Youxi WU cong shen He JIANG Xindong WU School of Computer Science and Engineering Hebei University of Technology Hebei Province Key Laboratory of Big Data Calculation School of Computer Science and Technology Tianjin University School of Software Dalian University of Technology School of Computer Science and Information Engineering Hefei University of Technology School of Computing and Informatics University of Louisiana at Lafayette

Pattern matching(or string matching) is an essential task in computer science, especially in sequential pattern mining, since pattern matching methods can be used to calculate the support(or the number of occurrences) of a pattern and then to determine whether the pattern is frequent or not. A state-of-the-art sequential pattern mining with gap constraints(or flexible wildcards) uses the number of non-overlapping occurrences to denote the frequency of a pattern. Non-overlapping means that any two occurrences cannot use the same character of the sequence at the same position of the pattern. In this paper, we investigate strict pattern matching under the non-overlapping condition. We show that the problem is in P at first. Then we propose an algorithm, called NETLAP-Best, which uses Nettree structure. NETLAP-Best transforms the pattern matching problem into a Nettree and iterates to find the rightmost root-leaf path, to prune the useless nodes in the Nettree after removing the rightmost root-leaf path. We show that NETLAP-Best is a complete algorithm and analyse the time and space complexities of the algorithm. Extensive experimental results demonstrate the correctness and efficiency of NETLAP-Best.

关键词： pattern matching sequential pattern mining gap constraint flexible wildcard non-overlapping occurrence Nettree

Stability and output feedback stabilization for systems with Markovian switching and impulse effects

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

控制理论与应用（英文版） 2010年第4期8卷 453-456页

作者： shen cong Yun ZOU Yijun ZHANG School of Mechanical and Electrical Engineering Heilongjiang University Harbin Heilongjiang 150080 China Department of Automation Nanjing Uniyersity of Science and Technology Nanjing Jiangsu 210094 China

We investigate the exponential stability in the mean square sense for the systems with Markovian switching and impulse *** on the statistic property of the Markov process,a stability criterion is ***,by the parameterizations via a family of auxiliary matrices,the dynamical output feedback controller can be solved via an LMI approach,which makes the closed-loop system exponentially stable.A numerical example is given to demonstrate the method.

关键词： Markov process Impulse Stability in the mean square sense Output feedback controller

An Efficient and Secure Privacy-Preserving Federated Learning Framework Based on Multiplicative Double Privacy Masking

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第9期80卷 4729-4748页

作者： cong shen Wei Zhang Tanping Zhou Yiming Zhang Lingling Zhang College of Cryptography Engineering Engineering University of PAPXi’an710086China Key Laboratory of People’s Armed Police for Cryptology and Information Security Xi’an710086China College of Information Engineering Engineering University of PAPXi’an710086China

With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine *** order to solve the problems of privacy leakage,high computational overhead and high traffic in some federated learning schemes,this paper proposes amultiplicative double privacymask algorithm which is convenient for homomorphic addition *** combination of homomorphic encryption and secret sharing ensures that the server cannot compromise user privacy from the private gradient uploaded by the *** the same time,the proposed TQRR(Top-Q-Random-R)gradient selection algorithm is used to filter the gradient of encryption and upload efficiently,which reduces the computing overhead of 51.78%and the traffic of 64.87%on the premise of ensuring the accuracy of themodel,whichmakes the framework of privacy protection federated learning lighter to adapt to more miniaturized federated learning terminals.

关键词： Federated learning privacy protection homomorphic encryption double mask secret sharing gradient selection

Biomimetic Preparation of Magnetite/Chitosan Nanocomposite via In Situ Composite Method ——Potential Use in Magnetic Tissue Repair Domain

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第6期22卷 792-796页

作者： HU Qiao-ling WU Jia CHEN Fu-ping shen Jia-cong Institute of Polymer Composites Zhejiang University Hangzhou 310027 P. R. China

This study focused on the preparation of magnetic chitusan nanocompesite that has a potential application to bone repair and regeneration using an in situ composite method where chitosan membrane was used as the template and NaOH was used as the precipitant. X-ray diffraction analysis results show the formation of magnetite in the chitosan matrix. From the magnetic measurement, it could be concluded that the magnetic chitosan rods were superparamagnetic,and that this is the unique property of nanomagnetite. Macroscopical layer structure of the magnetic chitosan rods was observed from the photographs after mechanical test, and the microlayer structure of the rods was observed from the images of scanning electron microscopy. The mechanism for preparing the rods was discussed in detail. Transmission electron microscope was used to investigate the magnetite particles in the chitosan matrix and from the images it was concluded that the magnetite particles dispersed well in chitosan matrix with particle size of about 10 nm. The mechanical properties of the magnetic chitosan rods were measured and the blending strength was found to be 98. 8 MPa. The mechanical properties did not decline when compared with those of the pure chitosan materials.

关键词： Chitosan Magnetite In situ compositing Red

Diverse interactions of five core type Ⅲ effectors from Ralstonia solanacearum with plants

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2023年第5期50卷 341-352页

作者： shen cong Jun-Zhou Li Zheng-Zhong Xiong Hai-Lei Wei Key Laboratory of Microbial Resources Collection and Preservation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China

Ralstonia solanacearum is a widespread plant bacterial pathogen that can launch a range of type Ⅲ effectors(T3Es)to cause *** this study,we isolate a pathogenic *** strain named P380 from tomato *** out of 12 core T3Es of strain P380 are introduced into Pseudomonas syringae DC3000D36E separately to determine their functions in interacting with ***3000D36E that harbors each effector suppresses FliC-triggered Pti5 and ACRE31 expression,ROS burst,and callose ***,RipU,and RipW elicit cell death as well as upregulate the MAPK cascades in Nicotiana *** derivatives RipC1^(△DDXDX(T/V))and RipW^(△DDKXXQ)but not RipAE^(K310R) fail to suppress ROS ***,RipAE^(K310R) and RipW^(△DDKXXQ) retain the cell death elicitation *** and RipW are associated with salicylic acid and jasmonic acid pathways,*** and RipAQ significantly promote the propagation of DC3000D36E in *** five core T3Es localize in diverse subcellular organelles of nucleus,plasma membrane,endoplasmic reticulum,and Golgi *** suppressor of G2 allele of Skp1 is required for RipAE but not RipU-triggered cell death in *** results indicate that the core T3Es in *** play diverse roles in plantpathogen interactions.

关键词： Ralstonia solanacearum TypeⅢsecretion system Effectors PTI ETI

Studies on the Mechanism of Methyl Methacrylate Polymerization Initiated　by　Volatile　and　Nonvolatile　Products　of　Methyl　Methacrylate　Plasma

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1995年第3期11卷 250-255页

作者： Liu, Xiao-dong Li, Jing Ma, Yu-gang shen, Jia-cong NORMAN BETHUNE UNIV MED SCI BASIC MED COLLCHANGCHUN 130023PEOPLES R CHINA JILIN UNIV KEY LAB MOLEC SPECTRA & STRUCTCHANGCHUN 130023PEOPLES R CHINA

he volatile (VPP) and nonvolatile (NVPP) products of methyl methacrylate(MMA) reaction in plasma chamber were used as initiators of MMA polymeriza-tion. From the structure analyses of the two initiators, the measurement of poly-merization kinetics, and the determination of the molecular weight of resultantpolymers , we found tliat MMA polymerization initiated by NVPP is a typical radical mechanism of polymerization which undergoes a process of continuous initiationand bifunction termination , while VPP-initiated polymerization suggested a mech-anism of living radical process fpolymerization with instantaneous initiation , chain-transfer to monomer , without termination).

关键词： Plasma initiated polymerzation Methyl methacrylate Kinetics

Forming and breaking the ceiling of inlet gas velocity regarding to separation efficiency of cyclone

在线全文

学校读者我要写书评

暂无评论

Particuology 2023年第8期79卷 85-94页

作者： Shaoxing Han Jingxuan Yang Ronghua Zhang cong shen Wenhao Lian Wei Zhang Xiaogang Hao College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan030024China Avic Xinxiang Aviation Industry(Group)Co LtdXinxiang453002China School of Chemistry and Chemical Engineering North University of ChinaTaiyuan030051China

The maximum-efficiency inlet velocity(MEIV)is a ceiling of inlet gas velocity that defines separation efficiency during cyclone design and *** and computational fluid dynamics(CFD)simulation exhibited that an apex cone at the dust outlet can break the ceiling and improve the sepa-ration *** phenomenon is closely related to the effect of excessive high inlet gas velocity on the back-mixing escape of fine particles,which is the final result of back mixing,entrainment by the rapid upward airflow,and secondary separation of the inner *** the center of the inner vortex,the airflow rotates slowly and moves rapidly *** elevator type of airflow delivers re-entrained particles to the vortex finder.A higher inlet gas velocity accelerates the elevator,causing more entrained particles to *** explains the decrease in efficiency at an excessively high inlet gas *** an apex cone is installed at the dust outlet,the back-mixing is significantly weakened because the vortex core is bounded to the center of separator,while the transport effect of rapid upward airflow is weakened by the decrease in axial velocity in the ***,particle escape is weakened even at excessive high inlet gas ***,the centrifugal effect is enhanced because of increased tangential velocity of the gas and ***,the ceiling of inlet gas velocity is broken.

关键词： Cyclonese parator Inletgas velocity Back mixing escape Precession vortex core Axial velocity