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Asymptotic bound on binary self-orthogonal codes

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Science china Mathematics 2009年第4期52卷 631-638页

作者： DING Yang Department of Mathematics, southeast university, nanjing 210096, china Department of Mathematics Southeast University Nanjing China

We present two constructions for binary self-orthogonal codes. It turns out that our constructions yield a constructive bound on binary self-orthogonal codes. In particular, when the in-formation rate R = 1/2, by our constructive lower bound, the relative minimum distance δ≈ 0.0595 (for GV bound, δ≈ 0.110). Moreover, we have proved that the binary self-orthogonal codes asymptotically achieve the Gilbert-Varshamov bound.

关键词： algebraic geometry codes concatenated codes Gilbert-Varshamov bound Reed-Muller codes self-dual basis self-orthogonal codes 11T71

Improved results on state estimation for neural networks with time-varying delays

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控制理论与应用（英文版） 2010年第2期8卷 215-221页

作者： Tao LI 1 , Shumin FEI 2 , Hong LU 2 (1.school of Instrument Science & Engineering, southeast university, nanjing jiangsu 210096, china 2.Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, southeast university, nanjing jiangsu 210096, china) school of Instrument Science & Engineering Southeast University Nanjing Jiangsu China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing Jiangsu China

In this paper, some improved results on the state estimation problem for recurrent neural networks with both time-varying and distributed time-varying delays are presented. Through available output measurements, an improved delay-dependent criterion is established to estimate the neuron states such that the dynamics of the estimation error is globally exponentially stable, and the derivative of time-delay being less than 1 is removed, which generalize the existent methods. Finally, two illustrative examples are given to demonstrate the effectiveness of the proposed results.

关键词： Exponential state estimator Recurrent neural networks Exponential stability Time-varying delays Linear matrix inequality (LMI)

Analyzing architecture articles

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中国科学：技术科学英文版 2010年第7期53卷 1739-1742页

作者： QI Kang Research Institute of Architecture, southeast university, nanjing 210096, china Research Institute of Architecture Southeast University Nanjing China

In the present study, we express the quality, function, and characteristics of architecture to help people comprehensively understand what architecture is. We also reveal the problems and conflict found in population, land, water resources, pollution, energy, and the organization systems in construction. china’s economy is transforming. We should focus on the cities, architectural environment, energy conservation, emission-reduction, and low-carbon output that will result in successful green development. We should macroscopically and microscopically analyze the development, from the natural environment to the artificial environment; from the relationship between human beings and nature to the combination of social ecology in cities, and farmlands. We must learn to develop and control them harmoniously and scientifically to provide a foundation for the methods used in architecture research.

关键词： architecture science sustainable development

A research into the large-scaled spatial forms of cities based on urban design

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Science china(Technological Sciences) 2009年第9期52卷 2486-2496页

作者： WANG JianGuo school of Architecture, Key laboratory of Urban and Architectural Heritage Conservation of Ministry of Education, southeast university, nanjing 210096, china school of Architecture Key laboratory of Urban and Architectural Heritage Conservation of Ministry of Education Southeast University Nanjing China

In the process of unprecedented urbanization in contemporary china, a great many of Chinese cities have witnessed a rapid expansion of urban scale to different degrees. With the continuous compilation, amendment and enforcement of urban planning, the functional structure, spatial environment, street patterns and textures and even the social aspect of cities have changed conspicuously, all of which have directly happened to the spatial forms of the dimension, or even the multi-dimension of a certain city. By describing and analyzing the structure, evolution and explicit tokens of the spatial forms of cities, this thesis attempts to set up a model of factors that affect urban forms, as well as discuss the attributes, protection, adjustment and development-potential of urban land closely associated with forms. In addition, on the basis of the professional features for urban design to participate in the modeling and construction-management of desirable spatial forms of cities, the author has put forward technical measures for quantitatively appraising and analyzing the large-scaled spatial forms of cities, thus offering technical support to municipal governments and management departments of planned construction.

关键词： large-scaled spatial forms of cities urban design digital technology

Experimental research on influencing factors of wet removal of NO from coal-fired flue gas by UV/H_2O_2 advanced oxidation process

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Science china(Technological Sciences) 2010年第7期53卷 1839-1846页

作者： LIU YangXian, ZHANG Jun, SHENG ChangDong, ZHANG YongChun & ZHAO Liang school of Energy & Environment, southeast university, nanjing 210096, china school of Energy & Environment Southeast University Nanjing China

Wet removal of NO from coal-fired flue gas by UV/H2O2 Advanced Oxidation Process (AOP) were investigated in a self-designed UV-bubble reactor. Several main influencing factors (UV intensity, H2O2 initial concentration, initial pH value, solution temperature, NO initial concentration, liquid-gas ratio and O2 percentage content) on the NO removal efficiency were studied. The results showed that UV intensity, H2O2 initial concentration, NO initial concentration and liquid-gas ratio are the main influencing factors. In the best conditions, the highest NO removal efficiency by UV/H2O2 advanced oxidation process could reach 82.9%. Based on the experimental study, the influencing mechanism of the relevant influencing factors were discussed in depth.

关键词： UV/H2O2 NO coal-fired flue gas AOP wet removal

On conservation and development of architecture and environment in the construction of large-scale national infrastructure——Exemplified by the jiangsu Section of the Eastern Route South-to-North Water Diversion Project

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Science china(Technological Sciences) 2009年第12期52卷 3613-3625页

作者： DUAN Jin ,LUO JianLi,WANG XingPing,TANG Jun&YU Gang school of Architecture,southeast university,nanjing 210096,china school of Architecture Southeast University Nanjing China

The water-diverting route project’s characteristics,natural landscapes,and histories and humanism of the jiangsu Section of the Eastern Route South-to-North Water Diversion Project were systemically analyzed through proposing and studying the canal culture routes,the water resources heritage corridors,the landscape and recreation corridors,and the town economic *** station areas along the water-diverting route were scientifically zoned and graded through quantitative and qualitative synthetic *** planning compendiums and construction controlling methods were proposed based on the project grades of points,lines,and *** and development of architecture and environment in the large-scale national infrastructure construction were explored *** and methods of developing harmonious water-supplying functions,ecological functions,landscape effects,and cultural effects of large-scale water resources were examined.

关键词： jiangsu Section of Eastern Route South-to-North Water Diversion Project canal culture routes water resources heritage corridors landscape and recreation corridors town economic corridors synthetical zoning and grading

Time · Space · Architecture

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Science china(Technological Sciences) 2009年第9期52卷 2481-2485页

作者： QI Kang Research Institute of Architecture, southeast university, nanjing 210096, china Research Institute of Architecture Southeast University Nanjing China

In the 20th century a Swiss writer wrote a book titled Time, Space and Architecture, in which he discussed the relationship between architecture and the times. Fifty years after that, this paper adopts the same title, hoping to deepen the understanding of the space-time structure in architecture and contribute to the new exploration of architectural forms.

关键词： Space Time Architecture

Classification of Wavelet Bases by Translation Subgroups and Nonharmonic Wavelet Bases

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Acta Mathematica Sinica,English Series 2000年第2期16卷 307-312页

作者： Qiao Wang Department of Radio Engineering,southeast university,nanjing 210096,P.R.china Department of Radio Engineerin Southeast University Nanjing 210096 P. R. China

The structure of the set S of shiftable points of wavelet subspaces is researched in this *** prove that S=R or S=(1/q)Z where q ∈ *** spectral and functional characterizations for the shiftability are ***,the nonhar... 详细信息

关键词： Wavelet Translation invariance Functional characterization

Modal identification of system driven by lévy random excitation based on continuous time AR model

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Science china(Technological Sciences) 2009年第12期52卷 3649-3653页

作者： DU XiuLi 1,2 &WANG FengQuan 1 1 College of Civil Engineering,southeast university,nanjing 210096,china 2 school of Mathematical Sciences,nanjing Normal university,nanjing 210097,china College of Civil Engineering Southeast University Nanjing China school of Mathematical Sciences Nanjing Normal University Nanjing China

Based on the continuous time AR model,this paper presents a new time-domain modal identification method of LTI system driven by the uniformly modulated lévy random *** structural dynamic equation is first transformed into the observation equation and the state equation(namely,stochastic differential equation).Based on the property of the strong solution of the stochastic differential equation,the uniformly modulated function is identified *** by virtue of the Girsanov theorem,we present the exact maximum likelihood estimators of ***,the modal parameters are identified by eigen *** results show that the method not only has high precision and robustness but also has very high computing efficiency.

关键词： modal identification uniformly modulated function CAR model lévy process exact maximum likelihood estimator