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Chinese Journal of Structural Chemistry 2006年第8期25卷 919-922页

作者： DENG Yi-Fang KUANG Dai-Zhi ZHANG Chun-Hua CHEN Man-Sheng PENG Yun-lin YANG Ying-qun LI Wei Department of Chemistry and Material Science Hengyang Normal University Hengyang 421008 China

The title complex [Zn（L）（phen）（CH3OH）] （L = C8H6BrO4NS, aminomethanesulfonic acid 5-bromo-salicylaldelyde schiff base; phen = 1,10-phenanthroline） has been synthesized and characterized by X-ray diffraction method. The crystal belongs to monoclinic, space group P21/c with a = 1.8712（3）, b = 1.38008（19）, c = 0.83685（12） nm, β = 97.791 （2）°, Mr = 569.72, V = 2.1411 （5） nm^3, Z= 4, Dc = 1.767 g/cm^3,μ = 3.151 mm^-1, F（000） = 1144, the final R = 0.0402 and wR = 0.0885. The central Zn（Ⅱ） is six-coordinated by one nitrogen and two oxygen atoms from the Schiff base, two nitrogen atoms from 1,10-phenanthroline and one oxygen from methanol to form a distorted octahedral coordination geometry.

关键词： zinc complex aminomethanesulfonic acid 5-bromo-salicylalddyde schiff base crystal structure thermal analysis

Chebyshev Biorthogonal Multiwavelets and Approximation

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Journal of Applied Mathematics and Physics 2021年第2期9卷 233-241页

作者： Xiaolin Zhou qun lin Tan Kah Kee College Xiamen University Xiamen China Mathematical Science College Xiamen University Xiamen China

In this paper, we construct Chebyshev biorthogonal multiwavelets, and use this multiwavelets to approximate signals (functions). The convergence rate for signal approximation is derived. The fast signal decomposition ... 详细信息

关键词： Chebyshev Polynomials Chebyshev Multiwavelets Function Approximation

Method of Constructing Core Collection for Malus sieversii in Xinjiang,China Using Molecular Markers

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Agricultural Sciences in China 2009年第3期8卷 276-284页

作者： ZHANG Chun-yu CHEN Xue-sen ZHANG Yan-min YUAN Zhao-he LIU Zun-chun WANGYan-ling lin qun State Key Laboratory of Crop Biology Shandong Agricultural University Tai ＇an 271018 P.R. China College of Plant Science Jilin University Changchun 130062 P.R. China College of Landscape Architecture Henan Institution of Science and Technology Xinxiang 453003 P.R. China

The method for constructing core collection ofMalus sieversii based on molecular marker data was proposed. According to 128 SSR allele of 109 M. sieversii, an allele preferred sampling strategy was used to construct M. sieversii core collection, using the UPGMA （unweighted pair-group average method） cluster method according to Nei ＆ Li, SM, and Jaccard genetic distances, by stepwise clustering, and compared with the random sampling strategy. The number of lost allele and t-test of Nei＇s gene diversity and Shannon＇s information index were used to evaluate the representative core collections. The results showed that compared with the random sampling strategy, allele preferred sampling strategy could construct more representative core collections. SM, difference for construction of M. sieversii core collection. Jaccard, and Nei ＆ Li genetic distances had no significant SRAP （sequence-related amplified polymorphism） data and morphological data showed that allele preferred sampling strategy was a good sampling strategy for constructing core collection of M. sieversii. Allele preferred sampling strategy combined with SM, Jaccard, and Nei ＆ Li genetic distances using stepwise clustering was the suitable method for constructing M. sieversii core collection.

关键词： Malus sieversii core collection allele preferred sampling strategy genetic distance SSR marker SRAP marker

Neural stem cell-derived exosome as a nano-sized carrier for BDNF delivery to a rat model of ischemic stroke

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Neural Regeneration Research 2023年第2期18卷 404-409页

作者： Zhi-Han Zhu Feng Jia Waqas Ahmed Gui-Long Zhang Hong Wang Chao-qun lin Wang-Hao Chen Lu-Kui Chen Department of Neurosurgery School of MedicineSoutheast UniversityNanjingJiangsu ProvinceChina Department of Neurosurgery Neuroscience CenterCancer CenterIntegrated Hospital of Traditional Chinese MedicineSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Neurosurgery The Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Neurosurgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

Our previo us study demonstrated the potential therapeutic role of human neural stem cell-derived exosomes(hNSC-Exo)in ischemic ***,we loaded brain-derived neurotrophic factor(BDNF)into exosomes derived from NSCs to construct engineered exosomes(BDNF-hNSC-Exo)and compared their effects with those of hNSC-Exo on ischemic stroke both in vitro and in *** a model of H_(2)O_(2)-induced oxidative stress in NSCs,BDNF-hNSC-Exo markedly enhanced cell *** a rat middle cerebral arte ry occlusion model,BDNF-hNSC-Exo not only inhibited the activation of microglia,but also promoted the differentiation of endogenous NSCs into *** results suggest that BDNF can improve the function of NSC-derived exosomes in the treatment of ischemic stro *** research may support the clinical use of other neurotrophic factors for central nervous system diseases.

关键词： brain-derived neurotrophic factor exosome inflammation ischemic stroke neural stem cell neurogenesis neurological recovery transplantation

Source and location mechanism for lode gold deposits hosted in metamorphic rocks in northeastern Hunan, China

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Journal of Central South University of Technology 2001年第2期8卷 108-113页

作者： LIU Liang ming,PENG Sheng lin,YANG qun zhou (College of Resources, Environment and Civil Engineering, Central South University, Changsha 410083, China) 1. College of Resources Environment and Civil Engineering Central South University 410083 Changsha China

For understanding the source and location mechanism of lode gold deposits hosted in metamorphic rocks in northeastern Hunan, the authors analyzed the REE (rare earth elements) in ores and their host rocks, metallogenic elements in host rocks near and distant from the ore bodies, and characteristics of ore controlling structures, and deduced their genetic implication. Their geochemical features of REE and metallogenic elements suggest that they are formed by mobilization of dispersed metallogenic materials in Lengjiaxi Group of Middle Proterozoic during deformation and metamorphism process, mainly in Wulingian period. From the attributes of ore controlling structures and regularity of location of gold metallization, it is concluded that the location of gold deposits is closely related to reverse shearing. Ore forming fluids are focused on the secondary faults and extension fractures of reverse shear zones of nearly EW strike by stress driven diffusion and seismic pumping.

关键词： lode gold deposit location fluid focus seismic pump northeastern Hunan

UNIFORM OPTIMAL-ORDER ESTIMATES FOR FINITE ELEMENT METHODS FOR ADVECTION-DIFFUSION EQUATIONS

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Journal of Systems Science & Complexity 2009年第4期22卷 555-559页

作者： qun lin Hong WANG Shuhua ZHANG Institute of Computational Mathematics and Scientific/Engineering Computing Chinese Academy of SciencesBeijing 100190 China. Department of Mathematics University of South Carolina Columbia South Carolina 29208 USA. Research Center for Mathematics and Economics Tianjin University of Finance and Economics Tianjin300222 China.

This article summarizes our recent work on uniform error estimates for various finite elementmethods for time-dependent advection-diffusion equations.

关键词： Advection-diffusion equation bilinear finite element method linear triangular elementmethod nonconforming finite element method.

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随机数求积分的0.9规律性

数学的实践与认识 2024年第2期54卷 219-225页

作者：林群陈竑焘刘宇宁首都师范大学数学科学学院北京100048 中国科学院数学与系统科学研究院北京100190 厦门大学数学科学学院福建厦门361005

从哲学观点出发,林群仅用一个公式相对真理/绝对真理=0.9(即比值都相同),就阐述了微积分的思想与方法.并且,林群等人还探索了在计算数学、概率统计等其它数学领域,甚至我们日常生活中的现象,也同样隐藏着这个公式.文章以利用随机数计算... 详细信息

从哲学观点出发,林群仅用一个公式相对真理/绝对真理=0.9(即比值都相同),就阐述了微积分的思想与方法.并且,林群等人还探索了在计算数学、概率统计等其它数学领域,甚至我们日常生活中的现象,也同样隐藏着这个公式.文章以利用随机数计算积分为例,揭示隐藏其中的上述哲学公式.

关键词：相对真理/绝对真理=0.9 随机数定积分

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HIGH ACCURACY ANALYSIS FOR FIRST ORDER HYPERBOLIC EQUATIONS BY PETROV-GALERKIN METHODS

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Systems Science and Mathematical Sciences 1998年第2期11卷 134-143页

作者： lin qun ZHANG Shuhua(Institute Of Systems Science, Academic Sinica, Beijing 100080, China) 中科院系统科学所北京

In this paper we employ the Petrov-Galerbo method for the first orderhyperbolic problems to get the Galerkin approtoation of high accuracy by means of theinterpolation poStprocessing, extrapolation and defect correcti... 详细信息

关键词： Petrov-Galerldn methods global superconvergence extrapolation defect correction.

CORRECTION　FOR　COLLOCATION　SOLUTIONS　OF　WIENER－HOPF　EQUATIONS

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Systems Science and Mathematical Sciences 1994年第1期7卷 78-81页

作者： SHI Jun lin qun(Institute of Systems Science, Academia Sinica, Beijing 100080, China) 中科院系统科学所北京

ＣＯＲＲＥＣＴＩＯＮＦＯＲＣＯＬＬＯＣＡＴＩＯＮＳＯＬＵＴＩＯＮＳＯＦＷＩＥＮＥＲ－ＨＯＰＦＥＱＵＡＴＩＯＮＳ￥ＳＨＩＪｕｎ；ＬＩＮＱｕｎ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉ... 详细信息

ＣＯＲＲＥＣＴＩＯＮＦＯＲＣＯＬＬＯＣＡＴＩＯＮＳＯＬＵＴＩＯＮＳＯＦＷＩＥＮＥＲ－ＨＯＰＦＥＱＵＡＴＩＯＮＳ￥ＳＨＩＪｕｎ；ＬＩＮＱｕｎ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，...

关键词： Collocation method correction self-adaptive.

DEFECT CORRECTION FOR FINITE ELEMENT GRADIENT

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Systems Science and Mathematical Sciences 1992年第3期5卷 287-288页

作者： lin qun ZHOU Aihui (Institute of Systems Science,Academia Sinica,Beijing 100080,China)

A defect correction scheme of fourth order accuracy for linear finite element gradient is proposed in this *** extends the Rannacher’s scheme for finite element solution to gradient and can compete with superconverge... 详细信息

关键词： Finite element