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Subsequent Assessment about China HighwayConstruction Projects

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Systems Science and Systems Engineering 1999年第2期9卷 189-197页

作者： ZHOU Wei WANG Binggang(Xi’an HighWay University, 710064, China)

In this paper, the writers systematically introduce the contents and methods for thesubsequent assessment about China highway construction projects, the principles for the evaluationtargets and the subsequent assessme... 详细信息

关键词： highway construction project subsequent assessment

The complex variable reproducing kernel particle method for elasto-plasticity problems

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 954-965页

作者： CHEN Li1 & CHENG YuMin2 1 Department of Engineering Mechanics,Chang’an University,Xi’an 710064,China 2 Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,China Department of Engineering Mechanics Chang'an University Xi'an 710064 China

On the basis of reproducing kernel particle method(RKPM),using complex variable theory,the complex variable reproducing kernel particle method(CVRKPM) is discussed in this *** advantage of the CVRKPM is that the correction function of a two-dimensional problem is formed with one-dimensional basis function when the shape function is *** the CVRKPM is applied to solve two-dimensional elasto-plasticity *** Galerkin weak form is employed to obtain the discretized system equation,the penalty method is used to apply the essential boundary *** then,the CVRKPM for two-dimensional elasto-plasticity problems is formed,the corresponding formulae are obtained,and the Newton-Raphson method is used in the numerical *** numerical examples are given to show that this method in this paper is effective for elasto-plasticity analysis.

关键词： meshless method reproducing kernel particle method(RKPM) complex variable reproducing kernel particle method(CVRKPM) correction function elasto-plasticity

A mathematical model for concept granular computing systems

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Science China(Information Sciences) 2010年第7期53卷 1397-1408页

作者： QIU GuoFang1, MA JianMin2, YANG HongZhi3 & ZHANG WenXiu3 1School of Management, Xi’an University of Architecture & Technology, Xi’an 710055, China 2Faculty of Science, Chang’an University, Xi’an 710064, China 3Faculty of Science, Xi’an Jiaotong University, Xi’an 710049, China School of Management Xi"an University of Architecture & Technology Faculty of Science Chang"an University Faculty of Science Xi"an Jiaotong University

Extent-intent and intent-extent operators are introduced between two complete lattices in this paper and a mathematical model for concept granular computing system is established. We proved that the set of all concepts in this system is a lattice with the greatest element and the least element. This framework includes formal concept lattices from formal contexts, L fuzzy concept lattices from L fuzzy formal contexts and three kinds of variable threshold concept lattices, i.e. the extension and the intension of a concept are a crisp set and a crisp set, a crisp set and a fuzzy set, a fuzzy set and a crisp set, respectively. Finally, some iterative algorithms for constructing concepts are proposed and they are proved to be optimal concepts under some conditions in this system.

关键词： granular computing formal concept analysis concept lattice mathematical model

A Mechanical Model for Three-phase Permanent Deformation of Asphalt Mixture under Repeated Load

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Journal of Wuhan University of Technology(Materials Science) 2009年第6期24卷 1001-1003页

作者：赵永利 School of Transportation Southeast University

On basis of the Burgers model, a new model consisting of modified dashpot and Van Der Poel model was derived from rheological and viscoelastic theory. Subsequently, triaxial repeated load permanent deformation tests of AC16 asphalt mixtures were conducted to validate this new developed model. Parameters of new developed model were obtained by a nonlinear regression analysis of test data, and then permanent strains and flow number of each mixture were calculated. The experimental results prove that the new developed model can well describe three phases permanent deformation of asphalt mixture under repeated load and it can be used for pavement mechanical analysis and rutting prediction.

关键词： asphalt mixture permanent deformation three phases theory triaxial repeated load

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一维自旋-轨道模型中的畴状轨道液体态

物理学报 2003年第9期52卷 2290-2292页

作者：张士勇长安大学基础部西安710064

研究了一个一维可解自旋轨道模型 .在大自旋极限下 ,自旋自由度可以近似用经典自旋来描述 .在没有外磁场情形 ,系统的基态是伊辛自旋反铁磁背景下的轨道液体态 .其低能元激发是类似于spinon的轨道量子 .而在有外磁场情形 ,系统会出现... 详细信息

研究了一个一维可解自旋轨道模型 .在大自旋极限下 ,自旋自由度可以近似用经典自旋来描述 .在没有外磁场情形 ,系统的基态是伊辛自旋反铁磁背景下的轨道液体态 .其低能元激发是类似于spinon的轨道量子 .而在有外磁场情形 ,系统会出现磁通点阵相 .同时 ,磁通将系统分割成不连通的轨道液体 .

关键词：一维自旋-轨道模型畴状轨道液体态自旋自由度电子自旋轨道系统轨道量子

STABILITY　OF　STEADY－STATE　SOLUTIONS　OF　THE　COMPETITION　MODEL　IN　THE　CHEMOSTAT

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Systems Science and Mathematical Sciences 1994年第3期7卷 256-260页

作者： WU Jianhua (Xi’an Institute of Highway, Xi,an 710064, China)LI Yanling(Department ff Mathematics, Shanxi Normal University, Xi’an 710062, China) 西安公路交通大学陕西西安 710064 陕西师范大学数学系陕西西安 710062

ＳＴＡＢＩＬＩＴＹＯＦＳＴＥＡＤＹ－ＳＴＡＴＥＳＯＬＵＴＩＯＮＳＯＦＴＨＥＣＯＭＰＥＴＩＴＩＯＮＭＯＤＥＬＩＮＴＨＥＣＨＥＭＯＳＴＡＴ￥ＷＵＪｉａｎｈｕａ（Ｘｉ＇ａｎＩｎｓｔｉｔｕｔｅｏｆＨｉｇｈｗａｙ，Ｘｉ，ａｎ７... 详细信息

ＳＴＡＢＩＬＩＴＹＯＦＳＴＥＡＤＹ－ＳＴＡＴＥＳＯＬＵＴＩＯＮＳＯＦＴＨＥＣＯＭＰＥＴＩＴＩＯＮＭＯＤＥＬＩＮＴＨＥＣＨＥＭＯＳＴＡＴ￥ＷＵＪｉａｎｈｕａ（Ｘｉ＇ａｎＩｎｓｔｉｔｕｔｅｏｆＨｉｇｈｗａｙ，Ｘｉ，ａｎ７１００６４，Ｃｈｉｎａ）ＬＩＹａｎ...

关键词： Linear stability steady-state solutions bifurcation solutions i-simple eigenvalue principal eigenvalue.

Study of the Design Method of a Full Adder Circuit

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Study of the Design Method of a Full Adder Circuit

一种新的平行多分量LFM信号的参数估计方法

教育部中南地区高等学校电子电气基础课教学研究会第二十届学术年会

作者： Lin Tao (School of Electronic & Control Engineering,Chang’ an University,Xi’an,710064,China )

A bit full adder is a very important component in the digital *** of a full-adder circuit, as an example,by changing its output function expression in the form of expression,use the gates,decoder, multiplexer etc 74 series devices,the eight circuits realization form are given respectively,and briefly analyzed the advantages and disadvantages of the various circuit *** example show that the design of combinational logic circuits has mobility and variety,it could give the instructiveness and the guiding for other design of combinational logic circuits.

关键词： digital system combinational logic circuit full-adder design method

来源： cnki会议评论

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系统仿真学报 2009年第9期21卷 2654-2657页

作者：崔华长安大学信息工程学院西安710064

基于Hilbert-Huang变换(HHT)能分解出信号的任何频率成份和线性调频(LFM)信号的瞬时频率是关于时间的直线的特性,对频率相近的平行多分量LFM信号进行HHT变换,再利用滤波和改进的最小二乘直线拟合,最后得到各分量较为准确的瞬时参数估计... 详细信息

基于Hilbert-Huang变换(HHT)能分解出信号的任何频率成份和线性调频(LFM)信号的瞬时频率是关于时间的直线的特性,对频率相近的平行多分量LFM信号进行HHT变换,再利用滤波和改进的最小二乘直线拟合,最后得到各分量较为准确的瞬时参数估计。该方法不需要改变HHT算法本身,而是利用滤波方法和进一步的最小二乘直线拟合抑制了HHT固有的边界效应对瞬时参数估计的影响,提高了频率提取的准确性,而且更容易实现。仿真结果表明该方法能成功地解决小波脊方法所不能解决的频率相距很近的平行多分量LFM信号的频率分离和参数估计问题。

关键词：多分量LFM信号参数估计 HHT 边界效应

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习惯法视野下中国古代“亲邻之法”的源起

法制与社会发展 2011年第3期17卷 72-82页

作者：韩伟长安大学政治与行政学院陕西西安710064

"亲邻之法"的正式形成一般认为是迟至五代的后周时期,根据敦煌吐鲁番发现的十余件汉文及回鹘文买卖契约文书的相应内容,可以发现,在晚唐时期已经存在习惯法意义上的亲邻之法,虽然只见"亲",不见邻,也缺乏明确的"优先权"实现规则,但"姻亲... 详细信息

"亲邻之法"的正式形成一般认为是迟至五代的后周时期,根据敦煌吐鲁番发现的十余件汉文及回鹘文买卖契约文书的相应内容,可以发现,在晚唐时期已经存在习惯法意义上的亲邻之法,虽然只见"亲",不见邻,也缺乏明确的"优先权"实现规则,但"姻亲忓恡"、"称为主己"等惯用说法,仍然反映了亲邻之法早期形成过程中的鲜明特征,可以确定为是习惯法意义上的"亲邻之法",并可依此推论至迟在唐懿宗大中年间,民间就有"亲邻之法"的广泛实践。由晚唐到五代,随着国家律令制度对"先问亲邻"习惯的吸收与确认,亲邻之法经历习惯法的成文化,于宋元最终成型。

关键词：亲邻之法先买权敦煌契约