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Finite-time disturbance attenuation of nonlinear systems

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Science in China(Series F) 2009年第11期52卷 2163-2171页

作者： MO LiPo JIA YingMin zheng zhiming Key Laboratory of Mathematics Informatics and Behavioral Semantics Ministry of Education Beihang University Beijing 100191 China The Seventh Research Division Beihang University Beijing 100191 China

This paper is devoted to the finite-time disturbance attenuation problem of affine nonlinear systems. Based on the finite time Lyapunov stability theory, some finite-time H∞ performance criterions are derived. Then the state-feedback control law is designed and the structure of such a controller is investigated. Furthermore, it is shown that the H∞ controller can also make the closed-loop system satisfy finite-time H∞ performance for nonlinear homogeneous systems. An example is provided to demonstrate the effectiveness of the presented results.

关键词： finite-time disturbance attenuation nonlinear systems H∞ performance finite-time stability

Post-Quantum Blockchain over Lattice

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Computers, Materials & Continua 2020年第5期63卷 845-859页

作者： Xiao Zhang Faguo Wu Wang Yao Wenhua Wang zhiming zheng School of Mathematics and Systems Science Beihang Universityand Key Laboratory of MathematicsInformatics and Behavioral SemanticsMinistry of EducationBeijing100191China Peng Cheng Laboratory Shenzhen518055China Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang UniversityBeijing100191China Aviation Industry Development Research Center of China BeijingChina

Blockchain is an emerging decentralized architecture and distributed computing paradigm underlying Bitcoin and other cryptocurrencies,and has recently attracted intensive attention from governments,financial institutions,high-tech enterprises,and the capital *** cryptographic security relies on asymmetric cryptography,such as ECC,***,with the surprising development of quantum technology,asymmetric cryptography schemes mentioned above would become ***,lattice-based cryptography scheme was proposed to be secure against attacks in the quantum *** 2018,with the aid of Bonsai Trees technology,Yin et al.[Yin,Wen,Li et al.(2018)]proposed a lattice-based authentication method which can extend a lattice space to multiple lattice spaces accompanied by the corresponding *** their scheme has theoretical significance,it is unpractical in actual situation due to extremely large key size and signature *** this paper,aiming at tackling the critical issue of transaction size,we propose a post quantum blockchain over *** using SampleMat and signature without trapdoor,we can reduce the key size and signature size of our transaction authentication approach by a significant *** of using a whole set of vectors as a basis,we can use only one vector and rotate it enough times to form a *** on the hardness assumption of Short Integer Solution(SIS),we demonstrate that the proposed anti-quantum transaction authentication scheme over lattice provides existential unforgeability against adaptive chosen-message attacks in the random *** compared to the Yin et al.[Yin,Wen,Li et al.(2018)]scheme,our scheme has better performance in terms of energy consumption,signature size and signing key *** the underlying lattice problem is intractable even for quantum computers,our scheme would work well in the quantum age.

关键词： Blockchain post quantum lattice random oracle

The ranks of Maiorana-McFarland bent functions

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Science China Mathematics 2008年第9期51卷 1726-1731页

作者： WENG GuoBiao FENG RongQuan QIU WeiSheng zheng zhiming LMAM School of Mathematical SciencesPeking UniversityBeijing 100871China

In this paper, the ranks of a special family of Maiorana-McFarland bent functions are discussed. The upper and lower bounds of the ranks are given and those bent functions whose ranks achieve these bounds are determined. As a consequence, the inequivalence of some bent functions are derived. Furthermore, the ranks of the functions of this family are calculated when t 6.

关键词： p-rank bent function difference set 06E30 11T71 94C10

基于文献计量的国内外未来产业研究热点与发展趋势

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情报工程 2024年第2期10卷 75-85页

作者：凡庆涛郑志明叶浅草周雷北京市科学技术研究院科技情报研究所北京100044 北京国际科技合作中心北京100080

[目的/意义]搜集和分析国内外未来产业研究主题文献,以期了解该领域研究进展和未来趋势,为学术界和产业界开展相关研究提供借鉴和启示。[方法/过程]采用文献计量和内容分析等方法,对国内外未来产业领域的研究现状、研究热点和未来趋势... 详细信息

[目的/意义]搜集和分析国内外未来产业研究主题文献,以期了解该领域研究进展和未来趋势,为学术界和产业界开展相关研究提供借鉴和启示。[方法/过程]采用文献计量和内容分析等方法,对国内外未来产业领域的研究现状、研究热点和未来趋势进行分析。[结果/结论]从研究态势看,该领域自2017年开始进入稳定期并呈快速发展态势。从研究热点看,国外关注未来产业的影响因素、人力资源、驱动技术、实践案例等,国内关注未来产业的基础理论、发展现状与对策、技术影响与识别、国外借鉴启示等。从研究趋势看,未来研究应围绕未来产业的企业发展、前沿技术、预测与选择、发展模式和动力机制等展开。

关键词：未来产业研究热点内容分析法发展趋势

An Advanced Quantum-Resistant Signature Scheme for Cloud Based on Eisenstein Ring

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Computers, Materials & Continua 2018年第7期56卷 19-34页

作者： Faguo Wu Xiao Zhang Wang Yao zhiming zheng Lipeng Xiang Wanpeng Li Key Laboratory of Mathematics Informatics and Behavioral SemanticsMinistry of EducationSchool of Mathematics and Systems ScienceBeihang UniversityBeijing100191China Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang UniversityBeijing100191China The Fifth Electronics Research Institute of Ministry of Industry and Information Technology Guangzhou510610China Department of Electrical and Electronic Engineering City University of LondonUK

Signature,widely used in cloud environment,describes the work as readily identifying its *** existing signature schemes in the literature mostly rely on the Hardness assumption which can be easily solved by quantum *** this paper,we proposed an advanced quantum-resistant signature scheme for Cloud based on Eisenstein Ring(ETRUS)which ensures our signature scheme proceed in a lattice with higher *** proved that ETRUS highly improve the performance of traditional lattice signature ***,the Norm of polynomials decreases significantly in ETRUS which can effectively reduce the amount of polynomials convolution ***,storage complexity of ETRUS is smaller than classical ***,according to all convolution of ETRUS enjoy lower degree polynomials,our scheme appropriately accelerate 56.37%speed without reducing its security level.

关键词： Signature quantum-resistant Eisenstein Ring ETRUS

化学学科核心素养在高中化学教学中的具体体现——以原电池的电极判断及电极反应式书写的再认识及应用为例

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云南化工 2024年第1期51卷 188-190页

作者：郑志明范艳玲刘龙海云南省下关第一中学云南大理671000

传统的化学教学中通常没有从根本上解释何为正负极,而是直接将一系列结论或现象抛给学生,从而使学生容易出现一听就懂,一做就错的问题。通过对化学学科核心素养的再认识,从本质出发,多角度、全方位去认识原电池中的正负极,进而引导学生... 详细信息

传统的化学教学中通常没有从根本上解释何为正负极,而是直接将一系列结论或现象抛给学生,从而使学生容易出现一听就懂,一做就错的问题。通过对化学学科核心素养的再认识,从本质出发,多角度、全方位去认识原电池中的正负极,进而引导学生正确顺利书写出原电池的电极反应。

关键词：电化学电极判断电极反应式书写

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政策工具视角下我国开放科学政策文本分析

西部学刊 2024年第20期 20-24页

作者：郑志明凡庆涛类淑霞叶浅草北京国际科技合作中心北京100080 北京市科学技术研究院科技情报研究所北京100044

运用政策工具、开放科学内容要素二维分析框架,采用内容分析法对国内65份开放科学政策文本进行量化分析。研究发现,国内开放科学政策更多关注权威工具和能力建设工具,激励工具、象征和劝诫工具、系统变革工具运用不足;开放科学各内容要... 详细信息

运用政策工具、开放科学内容要素二维分析框架,采用内容分析法对国内65份开放科学政策文本进行量化分析。研究发现,国内开放科学政策更多关注权威工具和能力建设工具,激励工具、象征和劝诫工具、系统变革工具运用不足;开放科学各内容要素政策工具分布不均,开放流程、开放合作与交流要素政策亟待强化。建议加强顶层设计,构建协同联动开放科学政策体系;优化政策工具结构,突出激励和系统变革工具;布局开放科学全内容要素,聚焦关键核心要素政策。

关键词：开放科学政策工具内容分析

On the Abundance of Chaotic Behavior for Generic One-Parameter Families of Maps

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Acta Mathematica Sinica,English Series 1996年第4期12卷 398-412页

作者： zheng zhiming Department of Mathematics Peking University Beijing, 100871 China Department of Mathematics Peking University Beijing China

In this paper, we want to show the abundance of chaotic systems with absolutely continuous probability measures in the generic regular family with perturbable points. More precisely, we prove that if fa:I→I, a∈P is a regular family satisfying some conditions described in the next section, then there exists a Borel set Ω(?)P of positive Lebesgue measure such that for every a∈Ω, fa admits an absolutely continuous invariant probability measure w.r.t. the Lebesgue measure. The idea of proof in this paper, as compared with that shown in [1] and [7], follows a similar line.

关键词： Chaos Generic regular family Probability measure

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航空橡胶软管的故障分析与维护技术研究

中国民航飞行学院学报 2024年第5期35卷 32-36页

作者：苟忠涛朱宁卢家旺郑志明中国人民解放军95655部队四川成都610000 中国人民解放军95616部队四川成都610000 中国民用航空飞行学院四川广汉618307

航空橡胶软管作为飞机关键的管路组件,发挥着输送各种含压航空流体介质的重要作用,其工作状况直接关系到航空器的安全运行。本文综合分析了航空橡胶软管在实际应用中遇到的故障问题,探讨了影响软管使用寿命的多种因素,提出了相应的使用... 详细信息

航空橡胶软管作为飞机关键的管路组件,发挥着输送各种含压航空流体介质的重要作用,其工作状况直接关系到航空器的安全运行。本文综合分析了航空橡胶软管在实际应用中遇到的故障问题,探讨了影响软管使用寿命的多种因素,提出了相应的使用注意事项和维护技术要点,并对未来航空橡胶软管维护技术的发展趋势进行了展望。

关键词：航空橡胶软管故障分析使用寿命维护技术