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Multiparty simultaneous quantum identity authentication with secret sharing

science china(Physics,Mechanics & Astronomy) 2008年第3期51卷 321-327页

作者： yang yuguang1,2,wen qiaoyan3.& zhang xing4,5 1 college of computer science and technology,beijing university of technology,beijing 100022,china 2 State Key Laboratory of Information Security (Graduate university of the Chinese Academy of sciences),beijing 100049,china 3 School of science,beijing university of Posts and Telecommunications,beijing 100876,china 4 Institute of Electronic technology,Information Engineering university,Zhengzhou 450004,china 5 Trusted Computing Laboratory,beijing university of technology,beijing 100022,china college of computer science and technology Beijing University of Technology Beijing China State Key Laboratory of Information Security (Graduate university of the Chinese Academy of sciences) Beijing China School of science Beijing University of Posts and Telecommunications Beijing China Institute of Electronic technology Information Engineering University Zhengzhou China Trusted Computing Laboratory Beijing University of Technology Beijing China

Two multiparty simultaneous quantum identity authentication (MSQIA) protocols based on secret sharing are presented. All the users can be authenticated by a trusted third party (TTP) simultaneously. In the first protocol,the TTP shares a random key K with all the users using quantum secret sharing. The ith share acts as the authentication key of the ith user. When it is necessary to perform MSQIA,the TTP generates a random number R secretly and sends a sequence of single photons encoded with K and R to all the users. According to his share,each user performs the corresponding unitary operations on the single photon sequence sequentially. At last,the TTP can judge whether the impersonator exists. The sec-ond protocol is a modified version with a circular structure. The two protocols can be efficiently used for MSQIA in a network. They are feasible with current technol-ogy.

关键词： quantum identity authentication secret sharing quantum cryptography

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一个群签名方案的安全性分析与改进

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计算机科学 2010年第4期37卷 75-76,90页

作者：张兴兰北京工业大学计算机学院北京100124

最近陈少真等人提出了一种具有前向安全和有效撤销成员性质的群签名方案,该方案通过在签名中增加一个验证取消展示实现对成员的撤销。分析了陈方案设计的缺陷,给出了一种改进的成员撤销算法。在强RSA和离散对数假设下,证明了改进方案的... 详细信息

最近陈少真等人提出了一种具有前向安全和有效撤销成员性质的群签名方案,该方案通过在签名中增加一个验证取消展示实现对成员的撤销。分析了陈方案设计的缺陷,给出了一种改进的成员撤销算法。在强RSA和离散对数假设下,证明了改进方案的有效性和安全性。

关键词：群签名成员撤销可跟踪性

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新一代高通量RNA测序数据的处理与分析

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生物化学与生物物理进展 2010年第8期37卷 834-846页

作者：王曦汪小我王立坤冯智星张学工生物信息学教育部重点实验室清华信息科学与技术国家实验室(筹)生物信息学研究部清华大学自动化系北京100084 吉林大学计算机科学与技术学院长春130012

随着新一代高通量DNA测序技术的快速发展,RNA测序(RNA-seq)已成为基因表达和转录组分析新的重要手段.RNA-seq技术产生的海量数据为生物信息学带来了新的机遇和挑战.有效地对测序数据进行针对性的生物信息学处理和分析,成为RNA-seq技术... 详细信息

随着新一代高通量DNA测序技术的快速发展,RNA测序(RNA-seq)已成为基因表达和转录组分析新的重要手段.RNA-seq技术产生的海量数据为生物信息学带来了新的机遇和挑战.有效地对测序数据进行针对性的生物信息学处理和分析,成为RNA-seq技术能否在科学探索中发挥重大作用的关键.以新一代Illumina/Solexa测序平台所产生的数据为例,在扼要介绍高通量RNA-seq测序流程的基础上,对RNA-seq数据处理和分析的方法和现有软件做一个较为全面的综述,并对其中有待进一步研究的问题进行展望。

关键词：高通量RNA测序转录组基因表达数据处理与分析生物信息学

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NeurDB: an AI-powered autonomous data system

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science china(Information sciences) 2024年第10期67卷 129-150页

作者： Beng Chin OOI Shaofeng CAI Gang CHEN Yanyan SHEN Kian-Lee TAN Yuncheng WU Xiaokui XIAO Naili xing Cong YUE Lingze ZENG Meihui zhang Zhanhao ZHAO School of Computing National University of Singapore college of computer science and technology Zhejiang University Department of computer science and Engineering Shanghai Jiao Tong University School of Information Renmin University of China School of computer science and technology Beijing Institute of Technology

In the wake of rapid advancements in artificial intelligence(AI), we stand on the brink of a transformative leap in data systems. The imminent fusion of AI and DB(AI×DB) promises a new generation of data systems, which will relieve the burden on end-users across all industry sectors by featuring AI-enhanced functionalities, such as personalized and automated in-database AI-powered analytics, and selfdriving capabilities for improved system performance. In this paper, we explore the evolution of data systems with a focus on deepening the fusion of AI and DB. We present NeurDB, an AI-powered autonomous data system designed to fully embrace AI design in each major system component and provide in-database AI-powered analytics. We outline the conceptual and architectural overview of NeurDB, discuss its design choices and key components, and report its current development and future plan.

关键词： AI$\times$DB in-database AI intelligent data system

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Simulating a Chern Insulator with𝐶C=±2 on Synthetic Floquet Lattice

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Chinese Physics Letters 2024年第9期41卷 1-8页

作者： Ling-Xiao Lei Wei-Chen Wang Guang-Yao Huang Shun Hu Xi Cao Xin-Fang zhang Ming-Tang Deng Ping-xing Chen Institute for Quantum science and technology College of ScienceNational University of Defense TechnologyChangsha 410073China Institute for Quantum Information&State Key Laboratory of High Performance Computing College of Computer Science and TechnologyNational University of Defense TechnologyChangsha 410073China Greatwall Quantum Laboratory Changsha 410006China Hefei National Laboratory Hefei 230088China

The synthetic Floquet lattice,generated by multiple strong drives with mutually incommensurate frequencies,provides a powerful platform for quantum simulation of topological *** this study,we propose a 4-band tight-binding model of the Chern insulator with a Chern number𝐶=±2 by coupling two layers of the half Bernevig–Hughes–zhang lattice and subsequently mapping it onto the Floquet lattice to simulate its topological *** determine the Chern number of our Floquet-version model,we extend the energy pumping method proposed by Martin et al.[2017 ***.X 7041008]and the topological oscillation method introduced by Boyers et al.[2020 ***.125160505],followed by numerical simulations for both *** simulation results demonstrate the successful extraction of the Chern number using either of these methods,providing an excellent prediction of the phase diagram that closely aligns with the theoretical one derived from the original bilayer half Bernevig–Hughes–zhang ***,we briefly discuss a potential experimental implementation for our *** work demonstrates significant potential for simulating complex topological matter using quantum computing platforms,thereby paving the way for constructing a more universal simulator for non-interacting topological quantum states and advancing our understanding of these intriguing phenomena.

关键词： properties. topological quantum

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车牌照定位及倾斜校正方法研究

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系统工程与电子技术 2004年第2期26卷 237-239页

作者：张兴会刘玲杜升之陈增强袁祉天津职业技术师范学院计算机系天津300222 南开大学自动化系天津300071

针对车牌照自动化管理中需要对采集到的车牌照图像进行自动校正和去除背景的处理问题,在传统的集合参数提取方法———Hough变换基础上,提出了一种实现对车牌照图像进行定位和倾斜校正的方法。根据车牌照自身特点,对对称Hough变换作出... 详细信息

针对车牌照自动化管理中需要对采集到的车牌照图像进行自动校正和去除背景的处理问题,在传统的集合参数提取方法———Hough变换基础上,提出了一种实现对车牌照图像进行定位和倾斜校正的方法。根据车牌照自身特点,对对称Hough变换作出改进和剪裁,使得该方法可对平行四边形形状的车牌照进行检测。测试证明,该方法缩短了计算时间,减小了空间复杂度。

关键词：对称Hough变换车牌照图像自动化管理定位倾斜校正图像处理

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Data embedding based on pixel value differencing and modulus function using indeterminate equation

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The Journal of china Universities of Posts and Telecommunications 2015年第1期22卷 95-100页

作者： Wang Zhao zhang Jie Liao Xin wen qiaoyan School of science Beijing University of Posts and Telecommunications college of computer science and Electronic Engineering Hunan University State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications

An effective data hiding method based on pixel value differencing （PVD） and modulus function （MF） PVD （MF-PVD） was proposed. MF-PVD method was derived by Wang et al in which the MF was employed to adjust the remainder of two pixels for data embedding and extraction. In the proposed method, a new remainder function in a more general form is defined by selecting proper parameters, in which an indeterminate equation is constructed and an optimal solution is applied to revise the pixels. This strategy leads to a significant image distortion reduction compared with the original method. The experiment reveals that, by preserving the original embedding capacity, the method provides better embedding efficiency than both MF-PVD and PVD methods.

关键词： pixel value differencing modulus function indeterminate equation data embedding

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Selection Method of Multi-Objective Problems Using Genetic Algorithm in Motion Plan of AUV

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Journal of Marine science and Application 2002年第1期1卷 81-86页

作者： zhang Ming-jun , ZHENG Jin-xing , zhang Jing college of Mechanical and Electrical Engineering, Harbin Engineering university, Harbin 150001 ,china college of computer and Information science, Harbin Engineering university, Harbin 150001 , china college of Mechanical and Electrical Engineering Harbin Engineering University Harbin 150001 China

To research the effect of the selection method of multi — objects genetic algorithm problem on optimizing result, this method is analyzed theoretically and discussed by using an autonomous underwater vehicle (AUV) as an object. A changing weight value method is put forward and a selection formula is modified. Some experiments were implemented on an AUV, TwinBurger. The results shows that this method is effective and feasible.

关键词： AUV multi — objective optimization genetic algorithm selection method

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Nonlinear Prediction with Deep Recurrent Neural Networks for Non-Blind Audio Bandwidth Extension

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china Communications 2018年第4期15卷 72-85页

作者： Lin Jiang Ruimin Hu Xiaochen Wang Weiping Tu Maosheng zhang National Engineering Research Center for Multimedia Software School of Computer Science Wuhan University Wuhan 430072 China Institute of Big Data and internet Innovation Hunan University of Commerce Changsha 410205 China Software college East China University of Technology Nanchang 330013 China Collaborative Innovation Center for Economics crime investigation and prevention technology Jiangxi Province Nanchang 330103China Hubei Key Laboratory of Multimedia and Network Communication Engineering Wuhan University Wuhan 430072 China Collaborative Innovation Center of Geospatial technology Wuhan 430079 China

Non-blind audio bandwidth extension is a standard technique within contemporary audio codecs to efficiently code audio signals at low bitrates. In existing methods, in most cases high frequencies signal is usually generated by a duplication of the corresponding low frequencies and some parameters of high frequencies. However, the perception quality of coding will significantly degrade if the correlation between high frequencies and low frequencies becomes weak. In this paper, we quantitatively analyse the correlation via computing mutual information value. The analysis results show the correlation also exists in low frequency signal of the context dependent frames besides the current frame. In order to improve the perception quality of coding, we propose a novel method of high frequency coarse spectrum generation to improve the conventional replication method. In the proposed method, the coarse high frequency spectrums are generated by a nonlinear mapping model using deep recurrent neural network. The experiments confirm that the proposed method shows better performance than the reference methods.

关键词： audio coding non-blind audiobandwidth extension context correlation deeprecurrent neural network

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圆盘体系在各向同性压缩下的接触结构及晶格化

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科学技术与工程 2024年第11期24卷 4389-4396页

作者：戴丹张兴刚贵州大学计算机科学与技术学院贵阳550025 贵州大学物理学院贵阳550025

结合离散元模拟及接触网络的统计分析对双分散圆盘体系在各向同性压缩下的接触结构及其晶格化进行研究。离散元模拟中通过改变大小颗粒的粒径比控制分散程度,使得体系成为单分散或者近似单分散的体系。用接触类型的百分比描述接触结构... 详细信息

结合离散元模拟及接触网络的统计分析对双分散圆盘体系在各向同性压缩下的接触结构及其晶格化进行研究。离散元模拟中通过改变大小颗粒的粒径比控制分散程度,使得体系成为单分散或者近似单分散的体系。用接触类型的百分比描述接触结构的统计特征。给出了体系的压强以及各种接触类型的百分比随堆积分数变化的曲线,研究了摩擦与粒径比对这些曲线的影响,并且着重讨论了摩擦和单分散程度对晶格结构的影响。模拟结果表明,随着圆盘数的增多,临界体积分数逐渐增大;随着摩擦系数与粒径比的增大,临界体积分数逐渐减小。摩擦与单分散程度是影响接触结构晶格化的主要因素。对于单分散体系,当摩擦系数较小时,体系在持续的压缩过程中容易形成三角晶格团簇;随着摩擦系数的增大,体系晶格化程度减小;当摩擦系数大于0.8以后,很难形成三角晶格团簇。对于近似单分散的体系,只有单分散程度很高时,压缩过程的持续才会导致明显的晶格化;随着粒径比的增大,晶格结构难以出现,体系通常形成无序堆积。

关键词：颗粒体系离散元模拟接触网络晶格结构堆积分数

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