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A Neural Network Recognition Method of Shape Pattern

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Journal of Iron and Steel Research International 2001年第1期8卷 16-20页

作者： peng Yan LIU Hong-min Yanshan University

A new pattern recognition method of shape was presented based on artificial neural network *** method avoids the defects of shape pattern recognition with polynomials and it has strong disturbance *** has been proved to be superior in recognizing different shape patterns by identifying many sorts of working sample books which the results are known.

关键词： shape pattern recognition artificial neural networ

Expression Profiling of Cassava Storage Roots Reveals an Active Process of Glycolysis/Gluconeogenesis

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Journal of Integrative Plant Biology 2011年第3期53卷 193-211页

作者： jun Yang Dong An peng Zhang Shanghai Center for Cassava Biotechnology National Laboratory of Plant Molecular Genetics Institute of Plant Physiology & Ecology Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Shanghai 200032 China Key Laboratory of Synthetic Biology Institute of Plant Physiology & Ecology Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Shanghai 200032 China Shanghai Chenshan Plant Science Research Center the Chinese Academy of Sciences Chenshan Botanical Garden Shanghai 201602 China

Mechanisms related to the development of cassava storage roots and starch accumulation remain largely unknown. To evaluate genome-wide expression patterns during tuberization, a 60 mer oligonucleotide microarray representing 20 840 cassawl genes was designed to identify differentially expressed transcripts in fibrous roots, developing storage roots and mature storage roots. Using a random variance model and the traditional twofold change method for statistical analysis, 912 and 3 386 upregulated and downregulated genes related to the three developmental phases were identified. Among 25 significantly changed pathways identified, glycolysis/gluconeogenesis was the most evident one. Rate-limiting enzymes were identified from each individual pathway, for example, enolase, L-lactate dehydrogenase and aldehyde dehydrogenase for glycolysis/gluconeogenesis, and ADP-glucose pyrophosphorylase, starch branching enzyme and glucan phosphorylase for sucrose and starch metabolism. This study revealed that dynamic changes in at least 16% of the total transcripts, including transcription fac- tors, oxidoreductases/transferases/hydrolases, hormone-related genes, and effectors of homeostasis. The reliability of these differentially expressed genes was verified by quantitative real-time reverse transcription-polymerase chain reaction. Tlhese studies should facilitate our understanding of the storage root formation and cassava improvement.

关键词： CASSAVA ROOTS (Botany) -- Formation GLYCOLYSIS GLUCONEOGENESIS LACTATE dehydrogenase REVERSE transcriptase polymerase chain reaction PLANT gene expression OLIGONUCLEOTIDE arrays

Spin-orbit coupling in Bose-Einstein condensate and degenerate Fermi gases

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Frontiers of physics 2014年第5期9卷 598-612页

作者： peng-jun Wang Jing Zhang State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Shanxi University Taiyuan 030006 China

We review our recent experimental realization and investigation of a spin orbit （SO） coupled Bose Einstein condensate （BEC） and quantum degenerate Fermi gas. By using two counter-propagathlg Ranlan lasers and controlling the different frequency of two R,aman lasers to engineer the atom light interaction, we first study the SO coupling in BEC. Then we study SO coupling in Fermi gas. We, observe the spin dephasing in spin dynamics and momentum distribution asymmetry of the equilibrium state as halhnarks of SO coupling in a Fermi gas. To clearly reveal the, property of SO coupling Fermi gas, we also study the momentmn-resolved radio-frequency spectroscopy which characterizes the energy momentum dispersion and spin composition of the quantum states. We observe the change of errmion surfaces in different helieity branches with different atomic density, which indicates that a Lifshitz transition of the Fermi surface topology change can be found by further cooling the system. At last, we study the momentum-resolved Raman spectroscopy of an ultracoht Fermi gas.

关键词： spin-orbit coupling Bose Einstein condensate Fermi gases topological change momentum-resolved radio-frequency spectroscopy momentum-resolved Raman spectroscopy

Smooth interpolation on homogeneous matrix groups for computer animation

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维普期刊数据库

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第7期7卷 1168-1177页

作者： LI jun HAO peng-wei Center for Information Science Peking University Beijing 100081 China Department of Computer Science Queen Mary University of London London E1 4NS UK

Homogeneous matrices are widely used to represent geometric transformations in computer graphics, with interpo- lation between those matrices being of high interest for computer animation. Many approaches have been proposed to address this problem, including computing matrix curves from curves in Euclidean space by registration, representing one-parameter curves on manifold by rational representations, changing subdivisional methods generating curves in Euclidean space to corresponding methods working for matrix curve generation, and variational methods. In this paper, we propose a scheme to generate rational one-parameter matrix curves based on exponential map for interpolation, and demonstrate how to obtain higher smoothness from existing curves. We also give an iterative technique for rapid computing of these curves. We take the computation as solving an ordinary differential equation on manifold numerically by a generalized Euler method. Furthermore, we give this algorithm’s bound of the error and prove that the bound is proportional to the shift length when the shift length is sufficiently small. Compared to direct computation of the matrix functions, our Euler solution is faster.

关键词： Computer animation Spline and piecewise polynomial approximation

Shape Discrimination Analysis of Rolled Strip Based on Strip Element Method

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Journal of Iron and Steel Research International 2004年第1期11卷 29-32页

作者： peng Yan CHU Yu-peng LIU Hong-min Yanshan University

Based on load-oriented manufacturing control theory, different combining modes and slab storage calculation method for continuous casting and hot rolling were discussed. The buffer capacity index of continuous casting-rolling was introduced, and the reasonable slab storage under different combining modes was calculated with buffer capacity index of 120.00 h for CCR, 79.20 h for HCR, 19.68 h for DHCR and 3.84 h for DR. Thin slab is 1.20 h, and the strip is zero. Theory gist was provided for steel enterprise to decrease storage.

关键词： continuous casting hot rolling production control slab storage

Homogenization of Surface Pressure Data in Tianjin, China

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Journal of Meteorological Research 2019年第6期33卷 1131-1142页

作者： peng SI Chuanjun LUO min WANG Tianjin Meteorological Information Center Tianjin Meteorological BureauTianjin 300074

Based on a hydrostatic check,a preliminary quality control procedure was applied to the hourly surface air pressure(SAP)and sea level pressure(SLP)data from 13 surface observation stations in Tianjin,*** daily and monthly series of the two pressures were tested for homogeneity with the RHtestsV5 software package and corrected by using the surface air temperature data as a *** results showed that 5 and 3 of the 13 stations had significant breakpoints in their SAP and SLP data,respectively,mainly caused by station *** matching adjustments showed that both pressures were dominated by positive deviation corrections and adjustments,with probability densities>0.2 concentrated in the ranges 0.02 to 1.80 and-0.02 to 1.64 *** of the variances and trends of the two pressures before and after adjustment showed that homogeneity correction can greatly reduce the influence of abnormal discrete pressure data and make the long-term trends of the series more *** Baodi station(54525),which has the most significant correction results,as an example,the trend amplitude of the adjusted SAP and SLP was increased by 0.316 and 0.294 hPa(10 yr)-1(95%confidence level),respectively,clearly weakening the sudden reduction induced in the two pressure series by the relocation of this *** with similar products showed that the adjusted data were better than those from the China Meteorological ***,the reliability of the surface pressure data and the processing techniques have been improved.

关键词： Tianjin station surface air pressure sea level pressure homogenization usability assessment

Painlevé-Kuratowski Convergences of the Solution Sets for Perturbed Vector Equilibrium Problems without Monotonicity

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Acta Mathematicae Applicatae Sinica 2014年第4期30卷 845-858页

作者： Zai-yun peng Xin-min YANG College of Science Chongqing JiaoTong University Department of Mathematics Chongqing Normal University

In this paper, we obtain some stability results for perturbed vector equilibrium problems. Under new assumptions, which are weaker than the assumption of C-strict monotonicity, we provide sufficient conditions for the Painlev^-Kuratowski Convergence of the weak efficient solution sets and efficient solution sets for the perturbed vector equilibrium problems with a sequence of mappings converging in real linear metric spaces. These results extend and improve some known results in the literature.

关键词： stability Painlev6-Kuratowski convergence efficient solution perturbed vector equilibrium prob-lem scalarization

Ruthenium (II)-catalyzed synthesis of phthalides via the cascade addition and cyclization of aromatic acids with aldehydes

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Science China Chemistry 2018年第2期61卷 153-158页

作者： Juan Fan peng-min Wang Jia-Ni Wang Xue Zhao Zhong-Wen Liu jun-Fa Wei Xian-Ying Shi Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal University

The ruthenium-catalyzed intermolecular cascade cyclization of aromatic acids with aromatic aldehydes, which involves the direct insertion of C–H bond into a polar C=O bond and the successive intramolecular nucleophilic substitution, was developed for the synthesis of 3-substituted phthalides in good to excellent yields. This one-pot procedure characterizes in a short reaction time, the cheaper Ru(II) as a catalyst, readily available acids and aldehydes as starting materials, and water as the only theoretical *** merits make the protocol an efficient and cost-effective route for the synthesis of 3-substituted phthalides.

关键词： nucleophilic addition cascade cyclization ruthenium 3-substituted phthalides C–H activation

Solutions for the Prescribing Mean Curvature Equation

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Acta Mathematicae Applicatae Sinica 2008年第3期24卷 497-510页

作者： Dao-min Cao Shuang-jie peng Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China School of Mathematics and Statistics Central China Normal University Wuhan 430079 China

By variational methods, for a kind of Yamabe problem whose scalar curvature vanishes in the unit ball BN and on the boundary S^N-1 the mean curvature is prescribed, we construct multi-peak solutions whose maxima are located on the boundary as the parameter tends to 0^＋ under certain assumptions. We also obtain the asymptotic behaviors of the solutions.

关键词： Mean curvature critical point concentrating solutions