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A GENERALIZED QUASI-NEWTON EQUATION AND COMPUTATIONAL EXPERIENCE

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Journal of Computational Mathematics 2006年第5期24卷 665-674页

作者： Lei-hong Zhang ping-qi pan Department of Mathematics Southeast University Nanjing 210096 China

The quasi-Newton equation has played a central role in the quasi-Newton methods for solving systems of nonlinear equations and/or unconstrained optimization problems. Insteady pan suggested a new equation, and showed that it is of the second order while the traditional of the first order, in certain approximation sense [12]. In this paper, we make a generalization of the two equations to include them as special cases. The generalized equation is analyzed, and new updates are derived from it. A DFP-like new update outperformed the traditional DFP update in computational experiments on a set of standard test problems.

关键词： System of nonlinear equations, Unconstrained optimization, Quasi-Newtone quation Second-order Quasi-Newton equation, Update formula.

A Rescheduling Method for Operation Time Delay Disturbance in Steelmaking and Continuous Casting Production Process

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Journal of Iron and Steel Research International 2012年第12期19卷 33-41页

作者： YU Sheng-ping pan Quan-ke State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819 Liaoning China

In the steelmaking and continuous casting （SMCC） production process, operation time delay may lead to casting break or processing conflict so that the initial scheduling plan becomes unrealizable. Existing research meth- ods are difficult to guarantee the accuracy of the model and successful application to actual applications. The resched- uling problem in response to operation time delay is firstly analyzed. This is then followed by the establishment of a novel multi-obiective nonlinear programming model （MONPM）. In specifications, a three-stage rescheduling method is proposed including the batches splitting （BS）, forward scheduling method （FSM） and backward scheduling meth- od （BSM）. As a result, the real-time application shows that the proposed rescheduling method efficiently ensures the continuous casting and dramatically shortens the redundant waiting time for molten steel in very short rescheduling time.

关键词： SMCC rescheduling disturbance heuristic algorithm

Computational Intelligence Prediction Model Integrating Empirical Mode Decomposition,Principal Component Analysis,and Weighted k-Nearest Neighbor

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Journal of Electronic Science and Technology 2020年第4期18卷 341-349页

作者： Li Tang He-ping pan Yi-Yong Yao School of Management and Economics University of Electronic Science and Technology of ChinaChengdu 611731 Tianfu College Southwestern University of Finance and EconomicsChengdu 610052 Intelligent Finance Research Center Chongqing Institute of FinanceChongqing 400067

On the basis of machine leaning,suitable algorithms can make advanced time series *** paper proposes a complex k-nearest neighbor(KNN)model for predicting financial time *** model uses a complex feature extraction process integrating a forward rolling empirical mode decomposition(EMD)for financial time series signal analysis and principal component analysis(PCA)for the dimension *** information-rich features are extracted then input to a weighted KNN classifier where the features are weighted with PCA ***,prediction is generated via regression on the selected nearest *** structure of the model as a whole is *** test results on real historical data sets confirm the effectiveness of the models for predicting the Chinese stock index,an individual stock,and the EUR/USD exchange rate.

关键词： Empirical mode decomposition(EMD) k-nearest neighbor(KNN) principal component analysis(PCA) time series

Emergent Travelling Pattern in a Spatial Predator-Prey System

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Chinese Physics Letters 2010年第2期27卷 315-317页

作者：刘盼萍 Department of Mathematics North University of China Taiyuan 030051

A predator-prey model taking into account both diffusion and migration is considered and a mathematical analysis of the spatial pattern is presented. The numerical simulations show that the travelling pattern can emer... 详细信息

关键词： Predation Accounting Migration

TWO NEW POLYOXYGENATED CYCLOHEXENES FROM UVARIA GRANDIFLORA

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Chinese Chemical Letters 1995年第4期6卷 305-308页

作者： Xi ping pan De Quan YU Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050

Two new polyoxygenated cyclohexenes, uvarigranol A and uvarigranol B, together with the known zeylenol were isolated from the roots of Uvaria grandiflora Roxb(Annonaceae). Their structures were established on the base... 详细信息

关键词： l?

LPE Growth of InAsPSb on InAs:Melt Composition,Lattice Mismatch and Surface Morphology

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Rare Metals 1990年第1期10卷 46-51页

作者： Zhang, Yonggang Zhou, ping Chen, Huiying pan, Huizhen Shanghai Inst of Metallurgy China

The LPE growth of quaternary InAs11-x-yPxSby with x = 0.2 and y = 0.09 on InAs substrate has been studied. This composition is very suitable for the laser and detector applications at about 2.5 μm. We show that in InAsPSb/InAs system there is a determinate relation between the surface morphology and the lattice mismatch of the epi-wafers, by which we can easily control the melt composition to grow high quality hetero-structures. The reason has been discussed. The p-n junctions with fairly good carrier profile have been prepared in this system.

关键词： Indiumarsenic Phosphorus Antimony Alloys Surface Properties Laser Pulses Applications Optical Fibers Optical Properties Optics Nonlinear Semiconducting Antimony Compounds Energy Gap

A NEW PERTURBATION SIMPLEX ALGORITHM FOR LINEARPROGRAMMING

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Journal of Computational Mathematics 1999年第3期17卷 233-242页

作者： ping-qi pan(Department of Applied Mathematics, Southeast University, Naming 210096, China) 东南大学应用数学系江苏南京

In this paper, we first propose a perturbation procedure for achieving dual feasibility, which starts with any basis without introducing artificial variables. This procedure and the dual simplex method are then incorporated into a general purpose algorithm; then, a modification of it using a perturbation technique is made in order to handle highly degenerate problems efficiently. Some interesting theoretical results are presented. Nmerical results obtained are reported, which are very encouraging though still preliminary.

关键词： linear programming simplex method perturbation dual feasibility

Trace element compositions of pyrite and stibnite:implications for the genesis of antimony mineralization in the Yangla Cu skarn deposit,Northwestern Yunnan,China

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Acta Geochimica 2024年第3期43卷 535-554页

作者： ping pan Xinfu Wang Bo Li Guo Tang Zuopeng Xiang Faculty of Land and Resource Engineering Kunming University of Science and TechnologyKunming 650093China Kunming Metallurgy College Kunming 650033China School of Earth Science Yunnan UniversityKunming 650500China Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co. LtdKunming 650051China

The Yangla Cu skarn deposit is located in the central part of the Jinshajiang Suture Zone,southwest China,with a total reserve of 150 Mt Cu@1.03%.The newly discovered antimony orebodies at the depth of Yangla are strictly controlled by the stratum,structure,and lithology,which are lenticular and vein-like within the marble fracture zone,which can provide a window into multistage miner-alization and ore genesis at *** can be divided into three types,Cu–Pb–Zn(skarn)pyrite,galena,and sphalerite,Cu(porphyry)chalcopyrite and pyrite,and Sb(hydrothermal)stibnite and *** mineral assem-blages were stibnite+pyrite+calcite+quartz±minor scheelite in antimony *** study presents quantitative measurements of the trace element compositions of pyrite and stibnite from the Yangla antimony *** of pyrite with electron probe microanalysis(EPMA)showed enrichment in Co,Ni,Sb,As,and Mo,and deficit in its S and Fe contents when compared to the stoichiometric con-centrations of S and Fe in *** Sb-related pyrite may belong to sedimentary-reworked genesis and may be modi-fied by hydrothermalfluids,thereby presenting a certain dif-ference(i.e.,crystal morphology,texture,and chemical com-position)compared to the skarn and porphyry Cu-related pyrite in the Yangla Cu skarn *** of stibnite with EPMA and inductively coupled plasma-mass spectrom-etry showed enrichment in As,Pb,Sn,Pb,Cu,and Zn,and presented much higher Sb contents and slightly lower S con-tents when compared to the stoichiometric concentrations of Sb and S in *** analysis of the stibnite trace elements showed correlations for the elemental pairs Cu–Pb,As–Sb,and Sn–Pb,and the coupled substitution equations Sb^(3+)↔Cu^(+)+Pb^(2+),Sb^(3+)↔As^(3+),and Sn^(2+)↔Pb^(2+)may be the major factors governed the incorporating Cu,Pb,As and Sn within the ***,this study preliminary shows that the antimony mineralization may belong to a car-bonate replacement h

关键词： Trace elements Pyrite Stibnite Substitution mechanisms Antimony mineralization Yangla Cu skarn deposit

Mechanisms of liver injuries caused by traditional Chinese medicines

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Hepatobiliary & pancreatic Diseases International 2024年第3期23卷 310-312页

作者： Shui-Fang Jin Qi pan Jin-Peng Zhou Xiao-ping pan Intensive Care Unit The First Affiliated Hospital of Zhejiang Chinese Medical University(Zhejiang Provincial Hospital of Chinese Medicine)Hangzhou 310006China Institute of Liver Diseases College of Basic Medical SciencesZhejiang Chinese Medical UniversityHangzhou 310053China The Second Clinical Medical College of Zhejiang Chinese Medical University Hangzhou 310056China

Drug-induced liver injury(DILI)is a common adverse drug reaction,which can even result in liver failure[1,2].The Chinese Medical Association issued the Guidelines for the Diagnosis and Treatment of DILI based on the Roussel Uclaf Causality Assessment Method(RUCAM)in 2015[3].A previous study reported that traditional Chinese medicines(TCMs),herbal and dietary supplements,and antituberculosis drugs were the main causes of DILI in China[4].Herb-induced liver injury(HILI)refers to liver injury caused by TCMs,natural drugs,and their related preparations[5].

关键词： drugs tuberculosis TCM