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Codes From Strongly Regular (α,β)-reguli

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Journal of shanghai jiaotong university(Science) 2008年第4期13卷 491-494页

作者：李秀丽 department of Mathematics Shanghai Jiaotong University

Strongly regular (α,β)-reguli are a class of incidence structures with given conditions which were introduced by Hamilton and Mathon. We introduce two classes of codes constructed from strongly regular (α,β)-regul... 详细信息

关键词： two-weight codes strongly regular (α,β)-reguli

I-V and C-V properties of TiO_2.thin film by pulsed-laser reactive deposition

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Chinese Science Bulletin 1998年第16期43卷 1344-1349页

作者： FU Zhengwen 1, ZHOU Mingfei 1, ZHANG Shengkun 2.CHEN Lianyao 2.and QIN Qizong 1 1. Laser Chemistry Institute, Fudan university, shanghai 2.0433,{2. 2. department of physics, Fudan university, shanghai 2.0433,{2. Laser Chemistry Institute Fudan University Shanghai China department of Pnysics Fudan University Shanghai China

TiO-2.thin films have bee deposited on p-Si(111) substrates by pulsed-laser ablation of metallic Ti target in the O-3 ambient. The current-voltage and capacitance-voltage of the Al/TiO-2.Si capacitors are measured. The results show that the dielectric constant of thin film after being annealed at 700℃ is found to be 46, and the border trap density and the interface state density at the TiO-2.p-Si interface are 1.8×10 12.cm -2.and 2.10 12.eV -1·cm -2. respectively. The conduction mechanisms of as-deposited films are also discussed.

关键词： TiO-2 dielectric properties electrical properties pulsed-laser deposition.

Bi-Lipschitz Maps in Q-regular Loewner Spaces

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Acta Mathematica Sinica,English Series 2008年第9期24卷 1555-1568页

作者： Ke Ying CHEN Ai Nong FANG department of Mathematics,shanghai {2. university,shanghai 2.02.0,P.R.china department of Mathematics Shanghai Jiaotong University Shanghai 200240 P. R. China

By applying the theory of quasiconformal maps in measure metric spaces that was introduced by Heinonen-Koskela, we characterize bi-Lipschitz maps by modulus inequalities of rings and maximal, minimal derivatives in Q-regular Loewner spaces. Meanwhile the sufficient and necessary conditions for quasiconformal maps to become bi-Lipschitz maps are also obtained. These results generalize Rohde’s theorem in ? n and improve Balogh’s corresponding results in Carnot groups.

关键词： Quasiconformal maps bi Lipschitz maps Loewner spaces modulus

NONLINEAR DATA RECONCILIATION METHOD BASED ON KERNEL PRINCIPAL COMPONENT ANALYSIS

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Chinese Journal of Mechanical Engineering 2003年第2期16卷 117-119页

作者： Yan Weiwu Shao Huihedepartment of Automation,shanghai {2. university,shanghai 2.0030, china department of Automation Shanghai Jiaotong University Shanghai 200030 China

In the industrial process situation, principal component analysis (PCA) is ageneral method in data reconciliation. However, PCA sometime is unfeasible to nonlinear featureanalysis and limited in application to nonlinear industrial process. Kernel PCA (KPCA) is extensionof PCA and can be used for nonlinear feature analysis. A nonlinear data reconciliation method basedon KPCA is proposed. The basic idea of this method is that firstly original data are mapped to highdimensional feature space by nonlinear function, and PCA is implemented in the feature space. Thennonlinear feature analysis is implemented and data are reconstructed by using the kernel. The datareconciliation method based on KPCA is applied to ternary distillation column. Simulation resultsshow that this method can filter the noise in measurements of nonlinear process and reconciliateddata can represent the true information of nonlinear process.

关键词： principal component analysis kernel data reconciliation nonlinear

Higher order bulk characteristic parameters of asymmetric nuclear matter

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 124-129页

作者： CHEN LieWen1,2.1department of physics, {2. Jiao Tong university, {2. 2.02.0, china 2.enter of Theoretical Nuclear physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, china 1. department of physics Shanghai Jiao Tong University Shanghai 200240 China 2. Center of Theoretical Nuclear physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China

The bulk parameters characterizing the energy of symmetric nuclear matter and the symmetry energy defined at normal nuclear density ρ0 provide important information on the equation of state (EOS) of isospin asymmetric nuclear matter. While significant progress has been made in determining some lower order bulk characteristic parameters, such as the energy E0(ρ0) and incompress ibility K0 of symmetric nuclear matter as well as the symmetry energy Esym(ρ0) and its slope parameter L, yet the higher order bulk characteristic parameters are still poorly known. Here, we analyze the correlations between the lower and higher order bulk char acteristic parameters within the framework of Skyrme Hartree-Fock energy density functional and then estimate the values of some higher order bulk characteristic parameters. In particular, we obtain J0 = (-355±95) MeV and I0 = (1473±680) MeV for the third order and fourth-order derivative parameters of symmetric nuclear matter at ρ0 and Ksym = (-100 ± 165) MeV, Jsym = (2.4 ± 385) MeV, Isym = (-1309 ± 2.2.) MeV for the curvature parameter, third-order and fourth-order derivative parameters of the symmetry energy at ρ0, using the empirical constraints on E0(ρ0), K0, Esym(ρ0), L, and the isoscalar and isovector nucleon effective masses. Furthermore, our results indicate that the three parameters E0(ρ0), K0, and J0 can reasonably characterize the EOS of symmetric nuclear matter up to 2.0 while the symmetry energy up to 2.0 can be well described by Esym(ρ0), L, and Ksym.

关键词： equations of state of nuclear matter forces in hadronic systems and effective interactions symmetry energy nuclear density functional theory and extensions asymmetric matter neutron matter

A Classical Toda Family with a Common Virasoro Symmetry Algebra

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Communications in Theoretical physics 2004年第6期41卷 813-815页

作者： QIAN Xian-Min LOU Sen-Yue ~1department of physics,{2. Jiao Tong university,{2. 2.0030,china ~2.0} of physics,Shaoxing College of Arts and Sciences,Shaoxing 312.00,china department of physics,Ningbo university,Ningbo 3152.1,china department of physics Ningbo University Ningbo 315211 China

By means of a simple ideal,which is firstly proposed for the continuous system,we present an arbitraryorder classical Toda family invariant under common Virasoro-type symmetry algebra.

关键词： classical Toda family Virasoro symmetry algebra

ON UNIFORM ASYMPTOTIC STABILITY OF INFINITE DELAY DIFFERENCE EQUATIONS

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Chinese Annals of Mathematics,Series B 2001年第4期22卷 495-502页

作者： ZHANG SHUNIAN department of Applied Mathematics, shanghai jiaotong university{2., china. E-mail: snzhang@*** department of Applied Mathematics Shanghai Jiaotong University Shanghai 200030 China

For the infinite delay difference equations of the general form, two new uniform asymptotic stability criteria are established in terms of the discrete Liapunov functionals.

关键词： Infinite delay difference equations Uniform asymptotic stability g-uniform asymptotic stability Discrete Liapunov functionals

CAPACITATED LOT SIZING AND SCHEDULING PROBLEMS USING HYBRID GA/TS APPROACHES

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Chinese Journal of Mechanical Engineering 2003年第1期16卷 21-24页

作者： Yang Honghong Wu Zhimingdepartment of Automation,shanghai {2. university,shanghai 2.0030, china department of Automation Shanghai Jiaotong University 上海 200030

The capacitated lot sizing and scheduling problem that involves indetermining the production amounts and release dates for several items over a given planning horizonare given to meet dynamic order demand without incurring backloggings. The problem consideringovertime capacity is studied. The mathematical model is presented, and a genetic algorithm (GA)approach is developed to solve the problem. The initial solutions are generated after usingheuristic method. Capacity balancing procedure is employed to stipulate the feasibility of thesolutions. In addition, a technique based on Tabu search (TS) is inserted into the genetic algorithmdeal with the scheduled overtime and help the convergence of algorithm. Computational simulation isconducted to test the efficiency of the proposed hybrid approach, which turns out to improve boththe solution quality and execution speed.

关键词： Production planning Capacitated lot sizing Genetic algorithm Tabusearch Capacity balancing

Parallel-pipelined Architecture of H.2.4 Deblocking Filter with Adaptive Dynamic Power

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Journal of shanghai jiaotong university(Science) 2010年第2期15卷 224-230页

作者：韦虎林涛 department of Electronic Engineering Shanghai Jiaotong University Institute of Very Large Scale Integrated Circuits Tongji University

In H.2.4,the computational complexity and memory access of deblocking filter are variable and depend on the video contents. In this paper,a pipelined VLSI architecture of deblocking filter with adaptive dynamic power is proposed. It avoids redundant computations and memory access by precluding the blocks which can be skipped. And the vertical and horizontal edges are simultaneously processed in an advanced scan order to speed up the decoder. As a result,the dynamic power of the proposed architecture can be reduced (up to about 89%) adaptively for different videos. And the off-chip memory access is improved compared to the previous designs. Moreover,the processing capability of the proposed architecture is very appropriate for real-time deblocking of high-definition television (HDTV,192.× 1080 pixel/frame,30 frame/s video signals) video operation at 38 MHz,which significantly outperforms the previous designs from 1.2. times to 4.8 times.

关键词： deblocking filter adaptive dynamic power parallel processing pipeline H.2.4