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Recognition of β-hairpin motifs in proteins by using the composite vector

AMINO ACIDS 2010年第3期38卷 915-921页

作者： Hu, Xiu-Zhen Li, Qian-Zhong Wang, Chun-Lian Inner Mongolia Univ Coll Phys Sci & Technol Lab Theoret Biophys Hohhot 010021 Peoples R China Inner Mongolia Univ Technol Coll Sci Hohhot 010051 Peoples R China

A composite vector method for predicting beta-hairpin motifs in proteins is proposed by combining the score of matrix, increment of diversity, the value of distance and auto-correlation information to express the information of sequence. The prediction is based on analysis of data from 3,088 non-homologous protein chains including 6,035 beta-hairpin motifs and 2,738 non-beta-hairpin motifs. The overall accuracy of prediction and Matthew's correlation coefficient are 83.1% and 0.59, respectively. In addition, by using the same methods, the accuracy of 80.7% and Matthew's correlation coefficient of 0.61 are obtained for other dataset with 2,878 non-homologous protein chains, which contains 4,884 beta-hairpin motifs and 4,310 non-beta-hairpin motifs. Better results are also obtained in the prediction of the beta-hairpin motifs of proteins by analysis of the CASP6 dataset.

关键词： beta-Hairpin Scoring matrix Increment of diversity auto-correlation function

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Walsh Spectral Characteristics and the auto-correlation function Characteristics of Forming Orthomorphic Permutations of Multi-Output functions

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1895-1898页

作者： ZHAO Yaqun WANG Jue Institute of Information Engineering Information Engineering University Zhengzhou 450002 Henan China State Key Laboratory of Information Security Chinese Academy of Sciences Beijing 100039 China

Orthomorphic permutations have good characteristics in cryptosystems. In this paper, by using of knowledge about relation between orthomorphic permutations and multi-output functions, and conceptions of the generalized Walsh spectrum of multi-output functions and the auto-correlation function of multi-output functions to investigate the Walsh spectral characteristics and the auto-correlation function characteristics of orthormophic permutations, several results are obtained.

关键词： orthomorphic permutation multi-output functions walsh spectral auto-correlation function

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A Novel Class of Binary Zero-correlation Zone Sequence Sets

A Novel Class of Binary Zero-Correlation Zone Sequence Sets

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IEEE Region 10 Conference on TENCON 2010

作者： Maeda, Takao Kanemoto, Shigeru Hayashi, Takafumi Univ Aizu Sch Comp Sci & Engn Fukushima 9658580 Japan

ISBN: (纸本)9781424468904

The present paper introduces the construction of binary sequences having a zero-correlation zone. The crosscorrelation function and the side-lobe of the auto-correlation function of the proposed sequence set is zero for the phase shifts within the zero-correlation zone. The proposed zero-correlation zone sequence set can be generated from an arbitrary Hadamard matrix of order n. The proposed zero-correlation zone sequence set consists of two sub groups. The inter-group cross-correlation function has much wider than the inner-group cross-correlation function. When the proposed sequence set is applied to the synthetic aperture ultrasonic imaging, this wide inter-group zero-correlation zone enables better image than usual method. The proposed sequence set is suitable for real-time synthetic aperture ultrasonic imaging.

关键词： Hadamard matrix auto-correlation function binary sequences binary sequences cross-correlation function image processing inner-group cross-correlation function inter-group cross-correlation function matrix algebra set theory synthetic aperture ultrasonic i

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The Characterizations of Binary Vector-Output Plateaued functions

The Characterizations of Binary Vector-Output Plateaued Func...

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IEEE International Conference on Wireless Communications, Networking and Information Security (WCNIS)

作者： Yue, Tinghai Tianjin Univ Technol Tianjin Key Lab Intelligence Comp & Novel Softwar Tianjin 300191 Peoples R China

ISBN: (纸本)9781424458516

The plateaued functions were first introduced by Zheng and Zhang and denote the Boolean functions on V-n such that their Walsh spectra are 0 or +/- 2(n-r/2), where r is a even number with 0 <= r <= n. In this paper, we extend the plateaued functions to vectoroutput Boolean functions. We establish a sequence of important inequalities on the auto-correlation functions and the Walsh spectra of all nonzero linear combinations of the component functions. In particular, we characterize the vector-output plateaued functions by means of a sequence of equalities.

关键词： auto-correlation function Cryptography Linear structures Nonlinearity Partially bent functions Plateaued functions

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Optimal design of phase function in Generalized DFT

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Physical Communication 2010年第4期3卷 255-264页

作者： Akansu, Ali N. Agirman-Tosun, Handan Torun, Mustafa U. New Jersey Institute of Technology Department of Electrical and Computer Engineering University Heights Newark NJ 07102 United States

Recently, a theoretical framework for Generalized DFT (GDFT) with nonlinear phase functions exploiting the phase space to design various constant modulus orthogonal transforms was introduced. This paper extends prior work to design longer bases widely used in real world communications systems. GDFT provides flexibilities in phase space yielding performance improvements over other code families including DFT in correlation metrics. GDFT phase functions are optimally designed in order to reduce inter carrier interference (ICI) and inter-symbol interference (ISI) that dictate the performance of a multiuser channel. It is presented in the paper that superior correlation of GDFT over DFT manifests itself in improved BER performance in direct sequence CDMA based multi-user communications systems. © 2010 Elsevier B.V.

关键词： auto-correlation function Cross-correlation function Direct Sequence Code Division Multiple Access (DS/CDMA) Discrete Fourier Transform (DFT) Generalized Discrete Fourier Transform (GDFT) Gold codes Walsh codes

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A Construction of Binary Vector-Output Plateaued functions

A Construction of Binary Vector-Output Plateaued Functions

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IEEE International Conference on Wireless Communications, Networking and Information Security (WCNIS)

作者： Yue, Tinghai Tianjin Univ Technol Tianjin Key Lab Intelligence Comp & Novel Softwar Tianjin 300191 Peoples R China

ISBN: (纸本)9781424458516

In this paper, the relationships among the vector-output plateaued functions, the vector-output partially bent functions and the vector-output bent functions are discussed. A new characterization of vector-output partially bent functions is given. Furthermore, a method for constructing vector-output plateaued functions is provided.

关键词： auto-correlation function Cryptography Linear structures Nonlinearity Partially bent functions Plateaued functions

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The Characterizations of Binary Vector–Output Plateaued functions

The Characterizations of Binary Vector–Output Plateaued Fun...

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2010 IEEE International Conference Conferenhce on Wireless Communications,Networking and Information Security(2010 IEEE 无线通信、网络技术与信息安全国际会议 WCNIS)

作者： Tinghai Yue Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 P. R. China

The plateaued functions were first introduced by Zheng and Zhang and denote the Boolean functions on Vn such that their Walsh spectra are 0 or ±2n?r/2, where r is a even number with 0 ≤ r ≤ n. In this paper, we extend the plateaued functions to vectoroutput Boolean functions. We establish a sequence of important inequalities on the auto-correlation functions and the Walsh spectra of all nonzero linear combinations of the component functions. In particular , we characterize the vector-output plateaued functions by means of a sequence of equalities.

关键词： auto-correlation function Cryptography Linear structures Nonlinearity Partially bent functions Plateaued functions

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A Method of Predicting theβ-hairpin Motifs in Proteins

A Method of Predicting theβ-hairpin Motifs in Proteins

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第四届全国生物信息学与系统生物学学术大会

作者：贾少春胡秀珍内蒙古工业大学理学院

Supersecondary structure is a layer of structure between secondary structure and tertiary structure.β-hairpin is a super secondary structure *** theβ-βmotif,if two antiparallelβ-strands are connected by loop and there are one or more hydrogen bonds between two adjacent strands,then the structure is called asβ-hairpin,otherwise

关键词： β-hairpins motif Random Forests algorithm Predicted Secondary structure information auto-correlation function

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A Construction of Binary Vector–Output Plateaued functions

A Construction of Binary Vector–Output Plateaued Functions

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2010 IEEE International Conference Conferenhce on Wireless Communications,Networking and Information Security(2010 IEEE 无线通信、网络技术与信息安全国际会议 WCNIS)

作者： Tinghai Yue Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 P. R. China

In this paper, the relationships among the vector–output plateaued functions, the vector-output partially bent functions and the vector-output bent functions are discussed. A new characterization of vector-output partially bent functions is given. Furthermore, a method for constructing vector–output plateaued functions is provided.

关键词： auto-correlation function Cryptography Linear structures Nonlinearity Partially bent functions Plateaued functions

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Time-varying system identification using a newly improved HHT algorithm

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COMPUTERS & STRUCTURES 2009年第23-24期87卷 1611-1623页

作者： Bao, Chunxiao Hao, Hong Li, Zhong-Xian Zhu, Xinqun Tianjin Univ Sch Civil Engn Tianjin 300072 Peoples R China Univ Western Australia Sch Civil & Resource Engn Nedlands WA 6009 Australia

A newly improved Hilbert-Huang transform (HHT) algorithm is presented for identification of time-varying systems and analysis of nonlinear structural response with closely spaced modes. In this improved HHT, the auto-correlation function of the structural response is taken as a substitute of input to reduce noise effect. A band-pass filter scheme and an effective intrinsic mode function (IMF) selection principle are combined to overcome the modal perturbation problem. Based on these, a time-varying system identification procedure is developed. Its robustness and effectiveness are verified by both numerically simulated and laboratory measured vibration data on a scaled concrete-steel composite beam model. (c) 2009 Elsevier Ltd. All rights reserved.

关键词： Time-varying system identification Improved HHT auto-correlation function Close mode separation Scaled concrete-steel composite beam model Dynamic test

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