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WEAK TYPE(1,1)BOUNDS FOR A MARCINKIEWICZ INTEGRAL

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Analysis in Theory and Applications 1994年第2期10卷 54-66页

作者： Hu Guoen Institute of information engineering, China Department of Mathematics Institute of information engineering zhengzhou, Henan, 450002. Department of Mathematics Institute of Information Engineering Henan

In this paper, the two-dimensional Marcinkewicz integral introduced by Stein μ(f)(x)=(∫_0~x|∫_(|x-y|≤1) _(|x-y|)^(Ω(x-y))f(y)dy|~2t^(-3)dt)~2 is shown to be of weak type (1,1) and weighted weak type (1,1) with respect to power weight |x|~' if - 1< α< 0, where Ω is homogeneous of degree 0. has mean value 0 and belongs to Llog^+L(S^1).

关键词： Math Pro BOUNDS FOR A MARCINKIEWICZ INTEGRAL WEAK TYPE

A new learning statistic for adaptive filter based on predicted residuals

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Progress in Natural Science:Materials International 2006年第8期16卷 833-837页

作者： YANG Yuanxi and GAO Weiguang (Xi'an Research Institute of Surveying and Mapping, Xi'an710054, China Institute of Surveying and Mapping, university of information engineering, zhengzhou 450052, China) Xi'an Research Institute of Surveying and Mapping Xi'an 710054 China Institute of Surveying and Mapping University of Information Engineering Zhengzhou 450052 China

A key problem for an adaptive filter is to establish a suitable adaptive factor for balancing the contributions of the measurements and the predicted state information from some kinematic models. The reasonable adaptive factor needs a reliable learning statistics to judge the state kinematic model errors. After analyzing the existing two kinds of learning statistics based on the state discrepancy and variance component ratio, a new learning statistic based on predicted residuals is set up, which is different from the exiting learning statistics. The new learning statistic does not need to estimate the kinemetic state parameters before the filtering process, Of course, it does not need necessary measurements to estimate state parameters for all observation epochs. The new learning statistic can be applied together with the learning factor constructed by the state discrepancy. The advantages and shortcomings of the new learning factor are analyzed, and an example is given.

关键词： adaptive factor adaptive filter kinematic model predicted residual.

System View of Product Data Management and Its Application

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武汉理工大学学报 2006年第S3期28卷 989-993页

作者： WU Feng XU Su College of information Science and engineering,Henan university of Technology,zhengzhou 450052,China, College of information Science and engineering Henan University of TechnologyZhengzhou 450052China

A product data management system for a manufacturing enterprise is to make sure that the proper product data can be communicated to the right people at the right *** paper describes a system analysis paradigm for data analysis in a product data management(PDM)*** aspects of the paradigm,i.e.,function,structure and behavior are rep- *** use of the paradigm explains why so many kinds of objects are necessary in a commercial database matrix and what models are available for developing a PDM *** another result,a lot of models are derived from the analysis of product data system paradigm to model product data and PDM database definitions.

关键词： product data management(PDM) system analysis product database paradigm

Complex transient dynamics of hidden attractors in a simple 4D system

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Chinese Physics B 2015年第5期24卷 270-274页

作者：党小宇李春彪包伯成武花干 College of Electronic and information engineering Nanjing University of Aeronautics and Astronautics School of Electronic & information engineering Nanjing University of Information Science & Technology School of information Science and engineering Changzhou University School of Electronic and Optical engineering Nanjing University of Science and Technology

A simple four-dimensional system with only one control parameter is proposed in this paper. The novel system has a line or no equilibrium for the global control parameter and exhibits complex transient transition behaviors of hyperchaotic attractors, periodic orbits, and unstable sinks. Especially, for the nonzero-valued control parameter, there exists no equilibrium in the proposed system, leading to the formation of various hidden attractors with complex transient dynamics. The research results indicate that the dynamics of the system shows weak chaotic robustness and depends greatly on the initial states.

关键词： transient dynamics hidden attractor equilibrium

A Nominative Multi-Proxy Signature Scheme Based on ECC

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Wuhan university Journal of Natural Sciences 2005年第1期10卷 223-226页

作者： MAChuan-gui GAOFeng-xiu WANGYan Collegeofinformationengineering InformationEngineeringUniversity.Zhengzhou450002HenanChina

A nominative multi-proxy signature in which the original signer authorizes a group of proxy signers is presented. Meanwhile, our proposed scheme is based on elliptic curve cryptosystem which is more efficient than the... 详细信息

关键词： proxy signature nominative proxy signature multi-proxy signature elliptic curve cryptosystem (ECC)

The Simultaneous Approximation Order by Hermite Interpolation in a Smooth Domain

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Acta Mathematica Sinica,English Series 2002年第4期18卷 631-646页

作者： Tian Liang TU Department of information engineering, North China Institute of Hydroelectricity, zhengzhou 450045, P. R. China Department of information engineering North China Institute of Hydroelectricity Zhengzhou P. R. China

Let D be a smooth domain in the complex plane. In D consider the simultaneous ap- proximation to a function and its ith (0≤i≤q) derivatives by Hermite interpolation. The orders of uniform approximation and approximation in the mean, are obtained under some domain boundary conditions. Some known results are included as particular cases of the theorems of this paper.

关键词： Simultaneous appoximation Hermite interpolation Approximation order Smooth domian

A Target Recognition Approach to Projecting HRR Profiles onto Subspace

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Journal of Systems engineering and Electronics 2003年第1期14卷 36-40页

作者： Pei Bingnan & Bao ZhengKey Lab. of Radar Signal Processing, Xidian university, Xi’an 710071, P. R. China Dept. of Electronic engineering, zhengzhou university, zhengzhou 450052, P.R. China Key Lab. of adar Signal Processing Xidian University. Xi'an 710071 P. R. China Dept. of Electronic engineering Zhengzhou University Zhengzhou 450052 P. R. China

Abstract: A array of the azimuthally averaged range-profile vectors and the inter-class and intra-class divergence matrixesare constructed iwth many frames of the high resolution range profiles which result from radar echoes of airplanes. Takingthe methods of whitening transformation and SVD produces a system of subspace vectors for target recognition. Where-upon, a template library for target recognition is built by the projection of a class-mean vector made from the radar dataonto the subspace for recognition. By Euclidean distance, a comparison is made between the above projection and eachtemplate in the library, to decide which class the target belongs to. Finally, simulations with the experimental radar dataarte given to show that the proposed method is robust to variation in azimuth and immune to additive Gaussian noisewhen SNR≥5dB.

关键词： Automatic target recognition High range resolution profile Distance classifier SVD Computer simulation

The　Fast　Blind　Equalization　Algorithm　with　Global　Convergence

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通信学报 1997年第3期 80-83页

作者： Lu Jun Li Tong (Institute of information and engineering of PLA,zhengzhou 450002)

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关键词： blind equalizer blind equalization algorithm cost function global minimum

A novel method of systematic error compensation for a position and orientation system

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Progress in Natural Science:Materials International 2008年第8期18卷 953-963页

作者： Xiuxiao Yuan* School of Remote Sensing and information engineering, Wuhan university, Wuhan 430079, China School of Remote Sensing and information engineering Wuhan University Wuhan 430079 China

A novel method is introduced for self-calibration and elimination of systematic errors for a position and orientation system (POS). The method uses a combined bundle block adjustment with POS data (named the POS-supported bundle block adjustment) without a calibration field. On the basis of delivering strict observation equations for POS data, the specific scheme of compensating the translation and drift systematic errors in a POS is given, and a prototype system WuCAPS is developed. The effects of eliminating POS systematic errors using the POS-supported bundle block adjustment for different ground control conditions are tested using two sets of actual aerial photos. The first set was taken over a flat region in the suburbs of the city of Yingkou in China and tested at a scale of 1:2500. The second set was taken over a high mountainous region in the desert region of Xinjiang in China and tested at a scale of 1:32,000. The empirical results verified that the POS systematic errors can be completely eliminated and the photo elements of exterior orientation obtained by the POS-supported bundle block adjustment can satisfy the requirements of aerial photogrammetric topographic mapping when four full ground control points (GCPs) are emplaced in the corners of the adjustment block for large-scale images of flat regions, but only one full GCP emplaced in the center of the adjustment block is needed for medium-small scale images of mountainous regions. This not only demonstrates the validity of the established mathematical model and the feasibility of the method proposed in this paper, but also avoids the use of a special calibration field. Therefore, it can simplify the existing POS operation rules and dramatically save on practical application costs, laying the theoretical foundation for widespread use of POS.

关键词： Position and orientation system (POS) Systematic error POS-supported bundle block adjustment Self-calibration Accuracy