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量子遗传算法在航空发动机PID控制中的应用 被引量:4
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作者 孙丰诚 孙健国 张海波 《推进技术》 EI CAS CSCD 北大核心 2007年第3期307-312,共6页
分析研究了量子遗传算法(Quantum Genetic A lgorithm-QGA)的原理及其优势,将有指导的群体灾变及多宇宙并行演化策略引入量子遗传算法,改善其收敛性。以理想二阶系统为参考模型,实际系统响应曲线与参考模型响应曲线误差积分为目标函数,... 分析研究了量子遗传算法(Quantum Genetic A lgorithm-QGA)的原理及其优势,将有指导的群体灾变及多宇宙并行演化策略引入量子遗传算法,改善其收敛性。以理想二阶系统为参考模型,实际系统响应曲线与参考模型响应曲线误差积分为目标函数,使用量子遗传算法进行发动机PID控制器参数优化并进行了数字仿真。仿真结果表明,量子遗传算法具有较好的全局收敛能力,应用于PID控制器控制参数优化后,控制器的控制效果良好,其在发动机控制系统中有较高的应用价值。 展开更多
关键词 航空发动机 ^量子遗传算法^+ ^量子计算^+ ^PID控制器^+ 参数最优化
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A Resistant Quantum Key Exchange Protocol and Its Corresponding Encryption Scheme 被引量:11
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作者 MAO Shaowu ZHANG Huanguo WU Wanqing LIU Jinhui LI Shuanbao Wang Houzhen 《China Communications》 SCIE CSCD 2014年第9期124-134,共11页
The emergence of quantum computer will threaten the security of existing public-key cryptosystems, including the Diffie Hellman key exchange protocol, encryption scheme and etc, and it makes the study of resistant qua... The emergence of quantum computer will threaten the security of existing public-key cryptosystems, including the Diffie Hellman key exchange protocol, encryption scheme and etc, and it makes the study of resistant quantum cryptography very urgent. This motivate us to design a new key exchange protocol and eneryption scheme in this paper. Firstly, some acknowledged mathematical problems was introduced, such as ergodic matrix problem and tensor decomposition problem, the two problems have been proved to NPC hard. From the computational complexity prospective, NPC problems have been considered that there is no polynomial-time quantum algorithm to solve them. From the algebraic structures prospective, non-commutative cryptography has been considered to resist quantum. The matrix and tensor operator we adopted also satisfied with this non-commutative algebraic structures, so they can be used as candidate problems for resisting quantum from perspective of computational complexity theory and algebraic structures. Secondly, a new problem was constructed based on the introduced problems in this paper, then a key exchange protocol and a public key encryption scheme were proposed based on it. Finally the security analysis, efficiency, recommended parameters, performance evaluation and etc. were also been given. The two schemes has the following characteristics, provable security,security bits can be scalable, to achieve high efficiency, quantum resistance, and etc. 展开更多
关键词 ergodic matrix tensor problem resist quantum key exchange protocol ENCRYPTION
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Constructing Non-binary Asymmetric Quantum Codes via Graphs 被引量:2
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作者 马智 冷日光 +1 位作者 魏正超 钟淑琴 《China Communications》 SCIE CSCD 2013年第2期33-41,共9页
The theory of quantum error correcting codes is a primary tool for fighting decoherence and other quantum noise in quantum communication and quantum computation. Recently, the theory of quantum error correcting codes ... The theory of quantum error correcting codes is a primary tool for fighting decoherence and other quantum noise in quantum communication and quantum computation. Recently, the theory of quantum error correcting codes has developed rapidly and been extended to protect quantum information over asymmetric quantum channels, in which phase-shift and qubit-flip errors occur with different probabilities. In this paper, we generalize the construction of symmetric quantum codes via graphs (or matrices) to the asymmetric case, converting the construction of asymmetric quantum codes to finding matrices with some special properties. We also propose some asymmetric quantum Maximal Distance Separable (MDS) codes as examples constructed in this way. 展开更多
关键词 asymmetric quantum codes quantum MDS codes graph construction
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Cryptanalysis of Cryptosystems Based on General Linear Group 被引量:1
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作者 Jianwei Jia Jinhui Liu Huanguo Zhang 《China Communications》 SCIE CSCD 2016年第6期217-224,共8页
Advances in quantum computers threaten to break public key cryptosystems such as RSA, ECC, and EIGamal on the hardness of factoring or taking a discrete logarithm, while no quantum algorithms are found to solve certai... Advances in quantum computers threaten to break public key cryptosystems such as RSA, ECC, and EIGamal on the hardness of factoring or taking a discrete logarithm, while no quantum algorithms are found to solve certain mathematical problems on non-commutative algebraic structures until now. In this background, Majid Khan et al.proposed two novel public-key encryption schemes based on large abelian subgroup of general linear group over a residue ring. In this paper we show that the two schemes are not secure. We present that they are vulnerable to a structural attack and that, it only requires polynomial time complexity to retrieve the message from associated public keys respectively. Then we conduct a detailed analysis on attack methods and show corresponding algorithmic description and efficiency analysis respectively. After that, we propose an improvement assisted to enhance Majid Khan's scheme. In addition, we discuss possible lines of future work. 展开更多
关键词 CRYPTOGRAPHY post quantum computational cryptography CRYPTANALYSIS non-abelian algebraic structures linear equations
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Key Exchange Protocol Based on Tensor Decomposition Problem 被引量:1
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作者 MAO Shaowu ZHANG Huanguo +3 位作者 WU Wanqing ZHANG Pei SONG Jun LIU Jinhui 《China Communications》 SCIE CSCD 2016年第3期174-183,共10页
The hardness of tensor decomposition problem has many achievements, but limited applications in cryptography, and the tensor decomposition problem has been considered to have the potential to resist quantum computing.... The hardness of tensor decomposition problem has many achievements, but limited applications in cryptography, and the tensor decomposition problem has been considered to have the potential to resist quantum computing. In this paper, we firstly proposed a new variant of tensor decomposition problem, then two one-way functions are proposed based on the hard problem. Secondly we propose a key exchange protocol based on the one-way functions, then the security analysis, efficiency, recommended parameters and etc. are also given. The analyses show that our scheme has the following characteristics: easy to implement in software and hardware, security can be reduced to hard problems, and it has the potential to resist quantum computing.Besides the new key exchange can be as an alternative comparing with other classical key protocols. 展开更多
关键词 key exchange resistant quantum hard problem tensor decomposition
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A Survey on Device-Independent Quantum Communications 被引量:4
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作者 黄靖正 银振强 +4 位作者 陈巍 王双 李宏伟 郭光灿 韩正甫 《China Communications》 SCIE CSCD 2013年第2期1-10,共10页
Quantum communications helps us to enhance the security and efficiency of communications and to deepen our understanding of quantum physics. Its rapid development in recent years has attracted the interest of research... Quantum communications helps us to enhance the security and efficiency of communications and to deepen our understanding of quantum physics. Its rapid development in recent years has attracted the interest of researchers from diverse fields such as physics, mathematics, and computer science. We review the background and current state of quantum communications technology, with an emphasis on quantum key distribution, quantum random number generation, and a relatively hot topic: device independent protocols. 展开更多
关键词 quantum communications de-vice-independent quantum key distribution
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Research on C—C Bond Length Distribution in Hydrocarbon Molecules 被引量:1
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作者 Liu Jun Long Jun +1 位作者 He Zhenfu Dai Zhenyu (Research Institute of Petroleum Processing,SINOPEC,Beijing 100083) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第3期6-11,共6页
The C--C bond dissociation energy (BDE) is a very important data in research of hydrocarbon cracking reactions, because it reflects the difficulty level of chemical reactions. But it is very difficult to obtain the ... The C--C bond dissociation energy (BDE) is a very important data in research of hydrocarbon cracking reactions, because it reflects the difficulty level of chemical reactions. But it is very difficult to obtain the C--C bond dissociation energy (BDE) by experiments, so using quantum chemistry calculation such as density functional theory (DFT) to study the C--C bond dissociation energy is a very useful means. The impact of acceptor substituents and donor substituents on the C--C bond length distribution was studied. 展开更多
关键词 hydrocarbon molecules bond dissociation energy (BDE) density functional theory (DFT) acceptor substituent donor substituent
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Inhibiting effect of[HOEmim][BF_4]and[Amim]Cl ionic liquids on the cross-linking reaction of bituminous coal 被引量:3
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作者 Wang Lanyun Xu Yongliang +1 位作者 Wang Shaokun Song Zhipeng 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第2期353-359,共7页
In order to reduce the hazard of coal spontaneous combustion,the cross-linking reaction between O-containing functional groups of coal should be inhibited.So the inhibitory effect of an ionic liquid(IL) on the cross-l... In order to reduce the hazard of coal spontaneous combustion,the cross-linking reaction between O-containing functional groups of coal should be inhibited.So the inhibitory effect of an ionic liquid(IL) on the cross-linking reaction was studied.The O-containing functional groups change the weight loss and H_2O,CO_2,CO yields of bituminous coal before and after[H0Emim][BF_4]and[Amim]Cl pre-treatment and were detected by Fourier Transform Infrared spectroscopy(FT1R) and Thermo Gravimetric(TC) analysis.The results show that | AmimjCI has a weaker ability to inhibit the cross-linking reaction of bituminous coal compared to[HOEmim][BF_4].Besides,based on Quantum Chemistry calculation,it was found that the different inhibiting effects of |H0Emim][BF_4]and[Amim]Cl are greatly related to their anions and the H linked with C2 atom on the imidazole ring.The H-donor ability of coal will be enhanced by[HOEmim][BF_4]leading to a weaker cross-linking reaction of coal. 展开更多
关键词 Ionic liquid Inhibit Cross-linking reaction Bituminous coal
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Quantum Chemical Calculations of the Structure,Property and Stability of Penta-coordinated Carbonium Ions Derived from Normal Butane
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作者 Tao Haiqiao Long Jun +3 位作者 Zhou Han Xie Chaogang Dai Zhenyu Wei Xiaoli 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2009年第2期27-30,共4页
The structure and energy of the carbonium ions formed upon protonation of butane were studied by the DFT methods. Four stable structures are identified for the protonated form of n-butane, the energy increases in the ... The structure and energy of the carbonium ions formed upon protonation of butane were studied by the DFT methods. Four stable structures are identified for the protonated form of n-butane, the energy increases in the following order: C2HC3〈C1HC2〈C2HH〈C1HH, and the stability decreases in the following order C2HC3〉C1HC2〉C2HH〉C1HH. The stability of the penta-coordinated carbonium ions may be explained by the electron distribution in the three-center-two-electron bonds. The delocalization of the penta-coordinated carbonium ion CHC with three-center-two-electron bonds on positive charges was stronger than that of the penta-coordinated earbonium ion CHH with three-center-two-electron bonds and its stability was higher than that of the penta-coordinated carbonium ion CHH with three-center-two-electron bonds. 展开更多
关键词 N-BUTANE penta-coordinated carbonium ions STRUCTURE quantum chemical calculation
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