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Preparation of Cluster States for Many Atoms in Cavity QED

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Communications in Theoretical Physics 2007年第7期48卷 83-86页

作者： ZHAN Zhi-Ming School of Physics & information engineering,Jianghan university,Wuhan 430056,China School of Physics & information engineering Jianghan University Wuhan 430056 China

We propose a scheme for the generation of the cluster states for many atoms in cavity *** our scheme,the atoms are sent through nonresonant cavity fields in the vacuum *** cavity fields are only virtually excitedand no quantum information will be transferred from the atoms to the cavity *** advantage is that the cavitiesare suppressed during the *** scheme can also be generalized to the ion trap system.

关键词： cluster cavity QED atom

First photometric study of the eclipsing binary PS Persei

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Research in Astronomy and Astrophysics 2011年第2期11卷 191-197页

作者： Jin-Zhao Yuan Physics and information engineering Institute,Shanxi Normal university,Linfen 041004,China Physics and information engineering Institute Shanxi Normal University Linfen 041004 China

CCD photometric observations of the eclipsing binary PS Persei （PS Per） were obtained on two consecutive days in *** 2003 version of the WilsonDevinney code was used to analyze the first complete light curves in the V and R *** is found that PS Per is a short-period Algol-type binary with the less massive component completely filling its inner critical Roche *** mass ratio of q=0.518 and the orbital inclination of i=89.86° are *** addition,based on all available times of primary light minima,including two new ones,the orbital period has been improved.

关键词： stars: binaries: close -- stars: binaries: eclipsing -- stars: individual:PS Per

A Note on the BMO Space with Non-doubling Measure

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Chinese Quarterly Journal of Mathematics 2004年第4期19卷 393-398页

作者： CHU Ze-fu, LE Fu-long(Department of Applied Mathematics, PL A university of information engineering, zhengzhou 450002, China) Department of Applied Mathematics PLA University of Information Engineering Zhengzhou 450002 China

Let μi be a positive Radon measure which only satisfies an appropriate growth condition, and RBMO(μ) be the BMO space associated with μ which was introduced by Tolsa. In this paper, it is proved that the definition... 详细信息

关键词： RBMO(μ) non doubling measure doubling cube

Alkylation of Phenol with Methanol over Basic X Zeolites

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Chinese Chemical Letters 1999年第12期10卷 983-986页

作者： Jun XU Al Zhen YAN Qin Hua XU(1Collegeof Chemical engineering, zhengzhou university of Technology, zhengzhou 450002Department of Chemistry, Naming university, Naming 210093) College of Chemical engineering Zhengzhou University of Technology Zhengzhou 450002 China Department of Chemistry Nanjing University Nanjing 210093 China

The alkylation of phenol with methanol was studied and a high selectivity for O-alkylation was attained over alkali-metal cation-exchanged X zeolites. The transformation of primary products of the title reaction was a... 详细信息

关键词： alkylation phenol and methanol basic zeolite

Optimal design study of high order FIR digital filters based on neural network algorithm

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Journal of Systems engineering and Electronics 2004年第2期15卷 115-119,130页

作者： Wang Xiaohua & He YigangCollege of Electrical and information engineering, Hunan university, Changsha 410082, P. R. China College of Electrical and information engineering, Changsha university of Science and Technology,Changsha 410077, P. R. China College of Electrical and information engineering Hunan University Changsha 410082 P. R. China College of Electrical and information engineering Changsha University of Science and Technology Changsha 410077 P. R. China

An optimal design approach of high order FIR digital filter is developed based on the algorithm of neural networks with cosine basis function . The main idea is to minimize the sum of the square errors between the amplitude response of the desired FIR filter and that of the designed by training the weights of neural networks, then obtains the impulse response of FIR digital filter . The convergence theorem of the neural networks algorithm is presented and proved, and the optimal design method is introduced by designing four kinds of FIR digital filters , i.e., low-pass, high-pass, bandpass , and band-stop FIR digital filter. The results of the amplitude responses show that attenuation in stop-bands is more than 60 dB with no ripple and pulse existing in pass-bands, and cutoff frequency of passband and stop-band is easily controlled precisely .The presented optimal design approach of high order FIR digital filter is significantly effective.

关键词： high order FIR digital filters amplitude-frequency response neural network convergence theorem optimal design.

Practical security against linear cryptanalysis for SMS4-like ciphers with SP round function

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Science China(information Sciences) 2012年第9期55卷 2161-2170页

作者： ZHANG Bin 1,2 & JIN ChenHui 2 1 P.O.Box 1936,Beijing 100193,China 2 Electronic Technology Institute,information engineering university,zhengzhou 450004,China Beijing China Electronic Technology Institute Information Engineering University Zhengzhou China

SMS4,a block cipher whose global structure adopts a special unbalanced Feistel scheme with SP round function,is accepted as the Chinese National Standard for securing Wireless *** this paper,in order to evaluate the security against linear cryptanalysis,we examine the upper bound of the maximum linear characteristic probability of SMS4-like ciphers with SP round *** the same way as for SPN ciphers,it is sufficient to consider the lower bound of the number of linear active *** propose a formula to compute the lower bound of the number of linear active s-boxes with regard to the number of *** security threshold of SMS4-like ciphers can be estimated easily with our ***,if the number of input words in each round of SMS4-like cipher is m,we find that it is unnecessary for designers to make the linear branch number of P greater than 2 m with respect to linear cryptanalysis.

关键词： block cipher SMS4-like cipher practical security linear cryptanalysis

Generalized Self-Adaptive Genetic Algorithms

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International Journal of Minerals,Metallurgy and Materials 2000年第1期14卷 72-75页

作者： Bin Wu Xuyan Tu Jian Wu information engineering School, university of Science and Technology Beijing, Beijing 100083, China Department of information and Control engineering, Southwest Institute of Technology, Mianyang 621002, China information engineering School University of Science and Technology Beijing Beijing 100083 China Department of information and Control engineering Southwest Institute of Technology Mianyang 621002 China

In order to solve the problem between searching performance and convergence of genetic algorithms, a fast genetic algorithm generalized self-adaptive genetic algorithm (GSAGA) is presented. (1) Evenly distributed initial population is generated. (2) Superior individuals are not broken because of crossover and mutation operation for they are sent to subgeneration directly. (3) High quality im- migrants are introduced according to the condition of the population schema. (4) Crossover and mutation are operated on self-adaptation. Therefore, GSAGA solves the coordination problem between convergence and searching performance. In GSAGA, the searching per- formance and global convergence are greatly improved compared with many existing genetic algorithms. Through simulation, the val- idity of this modified genetic algorithm is proved.

关键词： generalized self-adaptive genetic algorithm initial population immigration fitness function

Novel multi-objective optimization algorithm

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系统工程与电子技术：英文版 2014年第4期25卷 697-710页

作者： Jie Zeng Wei Nie College of information engineering Shenzhen University Modern Communication and information Processing Key Laboratory Shenzhen University

Many multi-objective evolutionary algorithms(MOEAs)can converge to the Pareto optimal front and work well on two or three objectives, but they deteriorate when faced with manyobjective problems. Indicator-based MOEAs, which adopt various indicators to evaluate the fitness values(instead of the Paretodominance relation to select candidate solutions), have been regarded as promising schemes that yield more satisfactory results than well-known algorithms, such as non-dominated sorting genetic algorithm(NSGA-II) and strength Pareto evolutionary algorithm(SPEA2). However, they can suffer from having a slow convergence speed. This paper proposes a new indicatorbased multi-objective optimization algorithm, namely, the multiobjective shuffled frog leaping algorithm based on the ε indicator(ε-MOSFLA). This algorithm adopts a memetic meta-heuristic,namely, the SFLA, which is characterized by the powerful capability of global search and quick convergence as an evolutionary strategy and a simple and effective ε-indicator as a fitness assignment scheme to conduct the search procedure. Experimental results, in comparison with other representative indicator-based MOEAs and traditional Pareto-based MOEAs on several standard test problems with up to 50 objectives, show that ε-MOSFLA is the best algorithm for solving many-objective optimization problems in terms of the solution quality as well as the speed of convergence.

关键词： evolutionary algorithm multi-objective optimization shuffled frog leaping algorithm(SFLA) convergence

ESKD-A New Structure of Expert System Based on Knowledge Discovery

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International Journal of Minerals,Metallurgy and Materials 2000年第1期14卷 63-71页

作者： Bingru Yang Fasheng liu Jiangtao Shen information engineering School, university of Science and Technology Beijing, Beijing, 100083, China information engineering School University of Science and Technology Beijing Beijing 100083 China

A new structure of ESKD (expert system based on knowledge discovery system KD (D&K)) is first presented on the basis of KD (D&K)-a synthesized knowledge discovery system based on double-base (database and knowledge base) cooperating mechanism. With all new features, ESKD may form a new research direction and provide a great probability for solving the wealth of knowledge in the knowledge base. The general structural frame of ESKD and some sub-systems among ESKD have been described, and the dynamic knowledge base based on double-base cooperating mechanism has been emphased on. According to the result of demonstrative experi- ment, the structure of ESKD is effective and feasible.

关键词： knowledge discovery expert system dynamic knowledge base, double-base cooperating mechanism