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Tightly Secure Public-Key Cryptographic Schemes from One-More Assumptions

Journal of Computer Science & Technology 2019年第6期34卷 1366-1379页

作者： Ge Wu Jian-Chang lai fu-Chun guo Willy Susilo fu-Tai Zhang School of Cyber Science and Engineering Southeast UniversityNanjing 211189China Institute of Cybersecurity and Cryptology School of Computing and Information Technology University of WollongongWollongong 2522Australia Purple Mountain laboratories Nanjing 211111China School of Mathematics and Computer Science Fujian Normal UniversityFuzhou 350117China School of Computer Science and Technology Nanjing Normal UniversityNanjing 210023China

A tightly secure cryptographic scheme refers to a construction with a tight security reduction to a hardness assumption,where the reduction loss is a small constant.A scheme with tight security is preferred in practice since it could be implemented using a smaller parameter to improve ***,Bader et al.(EUROCRYPT 2016)have proposed a comprehensive study on the impossible tight security reductions for certain(e.g.,key-unique)public-key cryptographic schemes in the multi-user with adaptive corruptions(MU-C)setting built upon non-interactive *** assumptions of one-more version,such as one-more computational Diffie-Hellman(n-CDH),are variants of the standard assumptions and have found various ***,whether it is possible to have tightly secure key-unique schemes from the one-more assumptions or the impossible tight reduction results also hold for these assumptions remains *** this paper,we give affirmative answers to the above question,i.e.,we can have efficient key-unique public-key cryptographic schemes with tight security built upon the one-more ***,we propose a digital signature scheme and an encryption scheme,both of which are key-unique and have tight MU-C security under the one-more computational Diffie-Hellman(n-CDH)*** results also reflect from another aspect that there indeed exists a gap between the standard assumptions and their one-more version counterparts.

关键词： public-key cryptography multi-user setting tight security one-more assumption

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Two Types of New Solutions to KdV Equation

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Communications in Theoretical Physics 2006年第4X期46卷 577-579页

作者： guo fu-Kui ZHANG Yu-Feng Information School Shandong University of Science and Technology Qingdao 266510 China Mathematical School Liaoning Normal University Dalian 116029 China

It is common knowledge that the soliton solutions u（x, t） defined by the bell-shape form is required to satisfy the following condition lira u（x, t） = u（±∞, t） = 0. However, we think that the above condition can be modified as lim u（x, t） = u（±∞, t）^x→ = c, where c is a constant, which is called as a stationary height of u（x, t） in the present paper.^x→∞ If u（x, t） is a bell-shape solitary solution, then the stationary height of each solitary wave is just c. Under the constraint c = 0, all the solitary waves coming from the N-bell-shape-sollton solutions of the KdV equation are the same-oriented travelling. A new type of N-soliton solution with the bell shape is obtained in the paper, whose stationary height is an arbitrary constant c. Taking c ≥ 0, the resulting solitary wave is bound to be the same-oriented travelling. Otherwise, the resulting solitary wave may travel at the same orientation, and also at the opposite orientation. In addition, another type of singular rational travelling solution to the KdV equation is worked out.

关键词： soliton solution Hirota method bilinear differential equation

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A Higher-Dimensional Hirota Condition and Its Judging Method

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Communications in Theoretical Physics 2008年第1期49卷 27-30页

作者： guo fu-Kui ZHANG Yu-Feng Information School Shandong University of Science and Technology Qingdao 266510 China

When a one-dimensional nonlinear evolution equation could be transformed into a bilinear differential form as F（Dt, Dx）f . f = O, Hirota proposed a condition for the above evolution equation to have arbitrary N-soliton solutions, we call it the 1-dimensional Hirota condition. As far as higher-dimensional nonlinear evolution equations go, a similar condition is established in this paper, also we call it a higher-dimensional Hirota condition, a corresponding judging theory is given. As its applications, a few two-dimensional KdV-type equations possessing arbitrary N-soliton solutions are obtained.

关键词： Hirota condition KdV equation soliton solution

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Integrable Coupling of KN Hierarchy and Its Hamiltonian Structure

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Communications in Theoretical Physics 2006年第5期45卷 799-801页

作者： guo fu-Kui ZHANG Yu-Feng Information School Shandong University of Science and Technology Qingdao 266510 China

The Hamiltonian structure *** integrable couplings obtained by our method has not been solved. In this paper, the Hamiltonian structure of the KN hierarchy is obtained by making use of the quadratlc-form identity.

关键词： integrable coupling KN hierarchy Hamiltonian structure quadratic identity

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Structure of BaGd_2(MoO_4)_4 Crystal

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Chinese Journal of Structural Chemistry 2007年第3期26卷 328-332页

作者： ZHAO Dan lIN Zhou-Bin WANG guo-fu State Key laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The title compound belongs to monoclinic, space group C2/c with a = 5.2694（1）, b = 12.6659（4）, c = 19.4108（2） A,β= 91.504（2）°, V = 1295.06（5） A^3, Z = 4 and Dc= 5.599 g/cm^3. The structure of BaGd2（MoO4）4 contains a MoO4 tetrahedron, a distorted GdO8 polyhedron, and Ba^2＋ ions in a tenfold coordination. The GdO8 polyhedra are linked together through edge-sharing to give a two-dimensional Gd layer. The MoO4 tetrahedra connected to the Gd atoms are capped up and down the Gd layer through common oxygen apices, thus-forming a new Gd-Mo layer. Finally, the Gd-Mo layers are held together through bridging BaO10 polyhedra to form a three-dimensional framework. Since the Ba-μ3-O bond has a large average distance of 2.888 A, this structural characteristic will result in a cleavage along the （001） plane.

关键词： Czochralski method BaGd2(MoO4)4 crystal

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Microstructure and Ferroelectric Properties of (Bi_(0.9)Ho_(0.1))_(3.999)Ti_(2.997)V_(0.003)O_(12) Thin Films Prepared by Sol-gel Method for Nonvolatile Memory

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Journal of Materials Science & Technology 2010年第8期26卷 679-681页

作者： Chengju fu Zhixiong Huang Jie li Dongyun guo School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Mechanical Engineering Chongqing University of Science and Technology Chongqing 400042 China

The （Bi0.9Ho0.1）3.999Ti2.997V0.003012 （BHTV） films have been prepared on Pt/Ti/SiO2/Si substrates by solgel method. The microstructure and ferroelectric properties of the BHTV films were investigated. The BHTV films show a single phase of Bi-layered Aurivillius structure and dense microstructure. The Ho3＋/V5＋ cosubstitution can effectively improve the ferroelectric properties. The BHTV film exhibits good ferroelectric properties with 2Pr of 47.6℃/cm2, 2Ec of 265 kV/cm （at applied field of 420 kV/cm）, dielectric constant of 305, dielectric loss of 0.031 （at 1 MHz）, good insulting behavior, as well as the fatigue-free behavior.

关键词： (Bi0.9Ho0.1)3.999Ti2.997V0.003O12 thin films Sol-gel method Co-substitution Ferroelectric properties Dielectric properties

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Using Computational Intelligence Algorithms to Solve the Coalition Structure Generation Problem in Coalitional Skill Games

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Journal of Computer Science & Technology 2016年第6期31卷 1136-1150页

作者： Yang liu guo-fu Zhang Zhao-Pin Su Feng Yue Jian-guo Jiang School of Computer and Information Hefei University of Technology Hefei 230009 China InteUigent Manufacturing Institute Hefei University of Technology Hefei 230009 China Department of Science and Technology Management Hefei University of Technology Hefei 230009 China

Coalitional skill games （CSGs） are a simple model of cooperation in an uncertain environment where each agent has a set of skills that are required to accomplish a variety of tasks and each task requires a set of skills to be completed, but each skill is very hard to be quantified and can only be qualitatively expressed. Thus far, many computational questions surrounding CSGs have been studied. However, to the best of our knowledge, the coalition structure generation problem （CSGP）, as a central issue of CSGs, is extremely challenging and has not been well solved. To this end, two different computational intelligence algorithms are herein evaluated： binary particle swarm optimization （BPSO） and binary differential evolution （BDE）. In particular, we develop the two stochastic search algorithms with two-dimensional binary encoding and corresponding heuristic for individual repairs. After that, we discuss some fundamental properties of the proposed heuristic. Finally, we compare the improved BPSO and BDE with the state-of-the-art algorithms for solving CSGP in CSGs. The experimental results show that our algorithms can find the same near optimal solutions with the existing approaches but take extremely short time, especially under the large problem size.

关键词： coalitional skill game coalitional structure generation two-dimensional binary encoding heuristic individual repair

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Synthesis, Crystal Structure and Antibacterial Activities of 3-[3-Methyl-(2-thienyl)methyl- enehydrazinocarbonyl]-(1H)-1,2,4-triazole

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1286-1289页

作者： YANG Jian-guo PAN fu-You SHAO Hong Office of Assets Administration Taizhou University Zhejiang 317000 China Department of Chemistry Taizhou University Zhejiang 317000 China

The title compound, C9H9N5OS, was synthesized by the reaction of 3-（1H）-1,2,4 -triazole hydrazine with 3-methyl-2-thiophenecarboxaldehyde in ethanol. The single crystal structure has been determined by X-ray diffraction analysis. The crystal belongs to monoclinic system, space group P2 1/n with a = 9.5550（10）, b = 11.9847（12）, c = 10.1074（11） A,β= 112.995（2）° V= 1065.47（19） A^3, Z = 4,μ = 0.290 mm^-1, Mr= 235.27, Dc = 1.467 g/cm^3 and F（000） = 488. The structure was solved by direct methods and refined to R = 0.0449. The crystal structure involves intermolecular hydrogen bonds of N-H…O and N-H…N as well as intramolecular hydrogen bond of N-H…N. Its biological activity has also been determined showing this type of compounds has certain antibacterial activity.

关键词： synthesis crystal structure antibacterial activities (1H)-1,2,4-triazole

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A novel two-stage Dissolved Gas Analysis fault diagnosis system based semi-supervised learning

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High Voltage 2022年第4期7卷 676-691页

作者： Xuemin Tan Chao guo Ke Wang fu Wan College of Control Engineering Chengdu University of Information TechnologyChengduChina State Grid Chengdu Power Supply Company ChengduChina China Electric Power Research Institute BeijingChina State Key laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChongqingChina

Dissolved Gas Analysis(DGA)is an important method for oil-immersed transformer fault ***,collecting labelled DGA data is difficult because the determi-nation of the transformer fault is time-consuming and expensive in the transformer substation,but DGA data without labels is easier to ***,the paper pro-posed a semi-supervised two-stage diagnostic system based DGA by using less labelled *** two-stage system includes a novel semi-supervised feature selection based Genetic Algorithm(GA)and Support Vector Machine(SVM)model(SSl-FS-GASVM)for selecting optimal features and a novel semi-supervised transformer fault diagnosis model based improved Artificial Fish Swarm Algorithm(AFSA)and SVM(SSl-IAFSA-SVM)for optimising the SVM ***,the performances of SSl-FS-GASVM and SSl-IAFSA-SVM models are tested and compared with traditional supervised diagnostic models combined with other optimisation methods,*** results show that the proposed two-stage system works in optimising features and parameters and has strong robustness in solving small sample classification problems.

关键词： fault diagnosis system

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Ultrasonic beam steering using Neumann boundary condition in multiplysics

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Acta Mechanica Sinica 2012年第1期28卷 146-150页

作者： Zhao-guo Qiu Bin Wu Cun-fu He College of Mechanical Engineeringand Applied Electronics Technology Beijing University of Technology100124 BeijingChina

The traditional one-dimensional ultrasonic beam steering has time delay and is thus a complicated problem. A numerical model of ultrasonic beam steering using Neumann boundary condition in multiplysics is presented in the present paper. This model is based on the discrete wave number method that has been proved theoretically to satisfy the continuous conditions. The propagating angle of novel model is a function of the distance instead of the time domain. The propagating wave fronts at desired angles are simulated with the single line sources for plane wave. The result indicates that any beam angle can be steered by discrete line elements resources without any time delay.

关键词： Ultrasonic beam steering Desired angle line element Time delay

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