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Qian-Zheng-San promotes regeneration after sciatic nerve crush injury in rats

Neural Regeneration Research 2019年第4期14卷 683-691页

作者： zhi-yong Wang Li-hua Qin Wei-Guang Zhang Pei-Xun Zhang Bao-Guo Jiang Department of Anatomy and Histo-embryology School of Basic Medical Sciences Peking University Department of Trauma and Orthopedics Peking University People's Hospital

Qian-Zheng-San, a traditional Chinese prescription consisting of Typhonii Rhizoma, Bombyx Batryticatus, Scorpio, has been found to play an active therapeutic role in central nervous system diseases. However, it is unclear whether Qian-Zheng-San has therapeutic value for peripheral nerve injury. Therefore, we used Sprague-Dawley rats to investigate this. A sciatic nerve crush injury model was induced by clamping the right sciatic nerve. Subsequently, rats in the treatment group were administered 2 mL Qian-Zheng-San(1.75 g/mL) daily as systemic therapy for 1, 2, 4, or 8 weeks. Rats in the control group were not administered Qian-Zheng-San. Rats in sham group did not undergo surgery and systemic therapy. Footprint analysis was used to assess nerve motor function. Electrophysiological experiments were used to detect nerve conduction function. Immunofluorescence staining was used to assess axon counts and morphological analysis. Immunohistochemical staining was used to observe myelin regeneration of the sciatic nerve and the number of motoneurons in the anterior horn of the spinal cord. At 2 and 4 weeks postoperatively, the sciatic nerve function index, nerve conduction velocity, the number of distant regenerated axons and the axon diameter of the sciatic nerve increased in the Qian-Zheng-San treatment group compared with the control group. At 2 weeks postoperatively, nerve fiber diameter, myelin thickness, and the number of motor neurons in the lumbar spinal cord anterior horn increased in the Qian-Zheng-San treatment group compared with the control group. These results indicate that QianZheng-San has a positive effect on peripheral nerve regeneration.

关键词： nerve regeneration traditional Chinese medicine crush injury peripheral nerve regeneration nerve conduction velocity sciatic function index nerve injury nerve repair formula scorpion neural regeneration

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Synthesis,Structure and Photophysical Properties of Heteronuclear Pt_2Cu Alkynyl Complexes

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Chinese Journal of Structural Chemistry 2015年第5期34卷 757-763页

作者： LI zhi-Hong GUO Wen-Jing XIE Zheng-Xiang WANG yong-Tao WEI Qiao-hua Institute of Nanomedicine and Nanobiosensing College of ChemistryFuzhou University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter and Graduate School of CASthe Chinese Academy of Sciences

Two luminescent hetero-trinuclear complexes [Pt2Cu（μ-dpppy）2（C≡CC6H4R-4）4]（Cl O4）（R = H,1;R = CH3,2;dpppy = 2,6-bis（diphenylphosphino）pyridine） have been synthesized and characterized by elemental analyses,ESI-MS,^1H and ^31P{^1H} NMR spectroscopy,and X-ray crystallography for *** photophysical properties in the solid state and in solutions at room temperature and in frozen glasses at 77 K were *** complexes 1 and 2 show strong orange-red emission in the solid state at room temperature and in frozen glasses at 77 K,and weak emission in solutions.

关键词： platinum(Ⅱ) copper(I) crystal structure heteronuclear alkynyl complexes

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Short-Term Period Variation of Relative Sunspot Numbers

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Chinese Journal of Astronomy and Astrophysics 2007年第6期7卷 823-830页

作者： zhi-Qiang Yin Yan-Ben Han Li-hua Ma Gui-Ming Le yong-Gang Han National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration Beijing 100081 Graduate School of Chinese Academy of Sciences Beijing 100049

We use wavelet transform to analyze the daily relative sunspot number series over solar cycles 10-23. The characteristics of some of the periods shorter than - 600-day are discussed. The results exhibit not only the variation of some short periods in the 14 solar cycles but also the characteristics and differences around solar peaks and valley years. The short periodic components with larger amplitude such as ～27, ～ 150 and ～360-day are obvious in some solar cycles, all of them are time-variable, also their lengths and amplitudes are variable and intermittent in time. The variable characteristics of the periods are rather different in different solar cycles.

关键词： Sun sunspots short-term period -- methods data analysis -- wavelet

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An Efficient and Chemoselective Deprotection of tert-Butyldimethyl-silyl Protected Alcohols Using SnCl_2·2H_2O as Catalyst

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Chinese Chemical Letters 2004年第12期15卷 1430-1432页

作者： Jun hua zhi yong JIANG Yan Guang WANG Department of Chemistry, Zhejiang University, Hangzhou 310027 Department of Chemistry Zhejiang University

An efficient and selective method for the deprotection of primary alcoholic tert-butyl-dimethylsilyl (TBS) ethers using SnCl_2·2H_2O as catalyst is described. The reaction conditionsallow primary alcoholic TBS ethers to be desilylated chemoselectively in the presence of phenolicTBS ethers, secondary and tertiary alcolholic TBS ethers, and the extensively used TBDPS-,acetyl-, benzyloxycarbonyl-, p-toluenesulfonyl- and benzyl protective groups.

关键词： tert-Butyldimethylsilyl (TBS) ethers deprotection tin dichloride

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CAVITATION CONTROL BY AERATION AND ITS COMPRESSIBLE CHARACTERISTICS

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Journal of Hydrodynamics 2006年第4期18卷 499-504页

作者： DONG zhi-yong SU Pei-lan School of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310032 China School of Forestry Shanxi Agricultural University Taigu 030801 China

This paper presents an experimental investigation and a theoretical analysis of cavitation control by aeration and its compressible characteristics at the flow velocity V=20m/s-50m/s. Pressure waveforms with and without aeration in cavitation region were measured. The variation of compression ratio with air concentration was described, and the relation between the least air concentration to prevent cavitation erosion and flow velocity proposed based on our experimental study. The experimental results show that aeration remarkably increases the pressure in cavitation region, and the corresponding pressure wave exhibits a compression wave/shock wave. The pressure increase in cavitation region of high-velocity flow with aeration is due to the fact that the compression waves/shock wave after the flow is aerated. The compression ratio increases with air concentration rising. The relation between flow velocity and least air concentration to prevent cavitation erosion follows a semi-cubical parabola. Also, the speed of sound and Mach number of high-velocity aerated flow were analyzed.

关键词： cavitation control by aeration compression wave/shock wave least air concentration speed of sound compression ratio

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Wet air oxidation treatment of H-acid wastewater

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Journal of Environmental Sciences 1998年第4期10卷 2-10页

作者： Jiang Zhan-peng Liu yong Yang zhi-hua Zhu Wan-peng Wang yong-yi Department of Environmental Engineering Tsinghua UniversityBeijing 100084China

This paper presents the effect of reaction factors on wet air oxidation(WAO) of H acid wastewater. Higher COD Cr removal were observed at low initial pH, high reaction temperature and no addition of Na 2SO 4. Initial oxygen pressure P O 2 should be consistent with the initial H acid concentration. The changes of some indexes were also studied. A significant initial (about 10 min) rapid reduction in COD Cr was observed at 200℃ and 250℃. The decline of pH and the increase of SO 2- 4 concentration were found in all the experiments. Some formic acid and large amount of acetic acid were detected in the treated solution in this study. The analysis of off gas indicated undetectable amount of SO 2 and nitrogen oxides. The biodegradability of H acid solution was greatly improved after WAO treatment. The ratio of BOD 5/COD Cr increased from initial 3 4% to 33 3% after one hour reaction at 160℃ and 3 MPa initial oxygen pressure(initial H acid concentration:10 g/L, mixing speed:300 r/min). The result of WAO of H acid production wastewater was similar to that of WAO of H acid pure compound in distilled water.

关键词： wet air oxidation(WAO) H acid biodegradability off gas BOD 5/COD Cr .

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Classification of power quality combined disturbances based on phase space reconstruction and support vector machines

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第2期9卷 173-181页

作者： zhi-yong LI Wei-lin WU School of Electrical Engineering Zhejiang University Hangzhou 310027 China

Power Quality (PQ) combined disturbances become common along with ubiquity of voltage flickers and harmonics. This paper presents a novel approach to classify the different patterns of PQ combined disturbances. The classification system consists of two parts, namely the feature extraction and the automatic recognition. In the feature extraction stage, Phase Space Reconstruction (PSR), a time series analysis tool, is utilized to construct disturbance signal trajectories. For these trajectories, several indices are proposed to form the feature vectors. Support Vector Machines (SVMs) are then implemented to recognize the different patterns and to evaluate the efficiencies. The types of disturbances discussed include a combination of short-term dis-turbances (voltage sags, swells) and long-term disturbances (flickers, harmonics), as well as their homologous single ones. The feasibilities of the proposed approach are verified by simulation with thousands of PQ events. Comparison studies based on Wavelet Transform (WT) and Artificial Neural Network (ANN) are also reported to show its advantages.

关键词： Power Quality (PQ) Combined disturbance Classification Phase Space Reconstruction (PSR) Support Vector Machines (SVMs)

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ON SMOOTH LU DECOMPOSITIONS WITH APPLICATIONS TO SOLUTIONS OF NONLINEAR EIGENVALUE PROBLEMS

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Journal of Computational Mathematics 2010年第6期28卷 745-766页

作者： hua Dai Zhong-zhi Bai Department of Mathematics Nanjing University of Aeronautics and Astronautics Nanjing 210016 China LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

We study the smooth LU decomposition of a given analytic functional A-matrix A（A） and its block-analogue. Sufficient conditions for the existence of such matrix decompositions are given, some differentiability about certain elements arising from them are proved, and several explicit expressions for derivatives of the specified elements are provided. By using these smooth LU decompositions, we propose two numerical methods for computing multiple nonlinear eigenvalues of A（A）, and establish their locally quadratic convergence properties. Several numerical examples are provided to show the feasibility and effectiveness of these new methods.

关键词： Matrix-valued function Smooth LU decomposition Pivoting Nonlinear eigenvalue problem Multiple eigenvalue Newton method.

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ON EIGENVALUE BOUNDS AND ITERATION METHODS FOR DISCRETE ALGEBRAIC RICCATI EQUATIONS

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Journal of Computational Mathematics 2011年第3期29卷 341-366页

We derive new and tight bounds about the eigenvalues and certain sums of the eigenvalues for the unique symmetric positive definite solutions of the discrete algebraic Riccati equations. These bounds considerably improve the existing ones and treat the cases that have been not discussed in the literature. Besides, they also result in completions for the available bounds about the extremal eigenvalues and the traces of the solutions of the discrete algebraic Riccati equations. We study the fixed-point iteration methods for com- puting the symmetric positive definite solutions of the discrete algebraic Riccati equations and establish their general convergence theory. By making use of the Schulz iteration to partially avoid computing the matrix inversions, we present effective variants of the fixed-point iterations, prove their monotone convergence and estimate their asymptotic convergence rates. Numerical results show that the modified fixed-point iteration methods are feasible and effective solvers for computing the symmetric positive definite solutions of the discrete algebraic Riccati equations.

关键词： Discrete algebraic Riccati equation Symmetric positive definite solution Eigenvalue bound Fixed-point iteration Convergence theory.

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Numerical Complexiton Solutions of Complex KdV Equation

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Communications in Theoretical Physics 2008年第9期50卷 568-574页

作者： AN Hong-Li LI yong-zhi CHEN yong Nonlinear Science Center and Department of Mathematics Ningbo University Ningbo 315211 China School of Information Science and Technology Nanjing Forestry University Nanjing 210037 China Shanghai Key Laboratory of Trustworthy Computing East China Normal University Shanghai 200062 China

In this paper, we directly extend the applications of the Adomian decomposition method to investigate the complex KdV equation. By choosing different forms of wave functions as the initial values, three new types of realistic numerical solutions： numerical positon, negaton solution, and particularly the numerical analytical complexiton solution are obtained, which can rapidly converge to the exact ones obtained by Lou et al. Numerical simulation figures are used to illustrate the efficiency and accuracy of the proposed method.

关键词： Adomian decomposition method complex KdV equation complexiton solution numerical complexiton solution

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