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Changes of Soil Water, Organic Matter, and Exchangeable Cations Along a Forest Successional Gradient in Southern China

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Pedosphere 2007年第3期17卷 397-405页

作者： YAN jun-hua zhou Guo-Yi ZHANG De-Qiang CHU Guo-Wei South China Institute of Botany Chinese Academy of Sciences Guangzhou 510650 （China）

Information on the distribution patterns of soil water content （SWC）, soil organic matter （SOM）, and soil exchangeable cations （SEC） is important for managing forest ecosystems in a sustainable manner. This study investigated how SWC, SOM, and SEC were influenced in forests along a successional gradient, including a regional climax （monsoon evergreen broad-leaved forest, or MEBF）, a transitional forest （coniferous and broad-leaved mixed forest, or MF）, and a pioneer forest （coniferous Masson pine （Pinus rnassoniana） forest, or MPF） of the Dinghushan Biosphere Reserve in the subtropical region of southern China. SWC, SOM, and SEC excluding Ca^2＋ were found to increase in the soil during forest succession, being highest in the top soil layer （0 to 15 cm depth） except for Na^＋. The differences between soil layers were largest in MF. This finding also suggested that the nutrients were enriched in the topsoil when they became increasingly scarce in the soil. There were no significant differences （P = 0.05） among SWC, SOM, and SEC. A linear, positive correlation was found between SWC and SOM. The correlation between SOM and cation exchange capacity （CEC） was statistically significant, which agreed with the theory that the most important factor determining SEC is SOM. The ratio of K^＋ to Na^＋ in the topsoil was about a half of that in the plants of each forest. MF had the lowest exchangeable Ca^2＋ concentration among the three forests and Ca^2＋：K^＋ in MPF was two times higher than that in MF. Understanding the changes of SWC, SOM, and CEC during forest succession would be of great help in protecting all three forests in southern China.

关键词： forest succession soil exchangeable cations soil organic matter soil water content

Puerarin protects rat brain against ischemia/reperfusion injury by suppressing autophagy via the AMPK-mT OR-ULK1 signaling pathway

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Neural Regeneration Research 2018年第6期13卷 989-998页

作者： Jin-Feng Wang Zhi-Gang Mei Yang Fu Song-Bai Yang Shi-Zhong Zhang Wei-Feng huang Li Xiong hua-jun zhou Wei Tao Zhi-Tao Feng Third-Grade Pharmacological Laboratory on Chinese Medicine Approved by State Administration of Traditional Chinese Medicine Medical College of China Three Gorges University Yichang Hubei Province China Xiangyang Hospital of Traditional Chinese Medicine Xiangyang Hubei Province China Yichang Hospital of Traditional Chinese Medicine Clinical Medical College of Traditional Chinese Medicine China Three Gorges UniversityYichang Hubei Province China Department of Medicine and Therapeutics the Chinese University of Hong Kong Hong Kong Special Administrative Region China The Institute of Neurology the First College of Clinical Medical Sciences China Three Gorges University Yichang Hubei Province China

Puerarin suppresses autophagy to alleviate cerebral ischemia/reperfusion injury, and accumulating evidence indicates that the AMPKm TOR signaling pathway regulates the activation of the autophagy pathway through the coordinated phosphorylation of ULK1. In this study, we investigated the mechanisms underlying the neuroprotective effect of puerarin and its role in modulating autophagy via the AMPK-m TOR-ULK1 signaling pathway in the rat middle cerebral artery occlusion model of cerebral ischemia/reperfusion injury. Rats were intraperitoneally injected with puerarin, 50 or 100 mg/kg, daily for 7 days. Then, 30 minutes after the final administration, rats were subjected to transient middle cerebral artery occlusion for 90 minutes. Then, after 24 hours of reperfusion, the Longa score and infarct volume were evaluated in each group. Autophagosome formation was observed by transmission electron microscopy. LC3, Beclin-1 p62, AMPK, m TOR and ULK1 protein expression levels were examined by immunofluorescence and western blot assay. Puerarin substantially reduced the Longa score and infarct volume, and it lessened autophagosome formation in the hippocampal CA1 area following cerebral ischemia/reperfusion injury in a dose-dependent manner. Pretreatment with puerarin（50 or 100 mg/kg） reduced Beclin-1 expression and the LC3-II/LC3-I ratio, as well as p-AMPK and p S317-ULK1 levels. In comparison, it increased p62 expression. Furthermore, puerarin at 100 mg/kg dramatically increased the levels of p-m TOR and p S757-ULK1 in the hippocampus on the ischemic side. Our findings suggest that puerarin alleviates autophagy by activating the APMK-m TOR-ULK1 signaling pathway. Thus, puerarin might have therapeutic potential for treating cerebral ischemia/reperfusion injury.

关键词： nerve regeneration puerarin autophagy cerebral ischemia/reperfusion AMPK-m TOR-ULK1 signaling pathway light chain 3 p62 ischemic stroke AMPK/m TOR traditional Chinese medicine middle cerebral artery occlusion neural regeneration

Fermented Chinese formula Shuan-Tong-Ling attenuates ischemic stroke by inhibiting inflammation and apoptosis

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Neural Regeneration Research 2017年第3期12卷 425-432页

作者： Zhi-gang Mei Ling-jing Tan Jin-feng Wang Xiao-li Li Wei-feng huang hua-jun zhou Tbird-Grade Pharmacological Laboratory on Chinese Medicine Approved by State Administration of Traditional Chinese Medicine Medical College of China Three Gorges UniversityYichangHubei ProvinceChina Key Laboratory of Cardiovascular and Cerebrovascular Diseases Translational Medicine China Three Gorges UniversityYichangHubei ProvinceChina Institute of Neurology the First College of Clinical Medical SciencesChina Three Gorges UniversityYichangHubei ProvinceChina

The fermented Chinese formula Shuan-Tong-Ling is composed of radix puerariae（Gegen）,salvia miltiorrhiza（Danshen）,radix curcuma（Jianghuang）,hawthorn（Shanzha）,salvia chinensis（Shijianchuan）,sinapis alba（Baijiezi）,astragalus（huangqi）,panax japonicas（Zhujieshen）,atractylodes macrocephala koidz（Baizhu）,radix paeoniae alba（Baishao）,bupleurum（Chaihu）,chrysanthemum（Juhua）,rhizoma cyperi（Xiangfu） and gastrodin（Tianma）,whose aqueous extract was fermented with lactobacillus,bacillus aceticus and ***-Ling is a formula used to treat brain diseases including ischemic stroke,migraine,and vascular ***-Tong-Ling attenuated H_2O_2-induced oxidative stress in rat microvascular endothelial ***,the potential mechanism involved in these effects is poorly *** were intragastrically treated with 5.7 or 17.2 m L/kg Shuan-Tong-Ling for 7 days before middle cerebral artery occlusion was *** results indicated Shuan-Tong-Ling had a cerebral protective effect by reducing infarct volume and increasing neurological ***-Tong-Ling also decreased tumor necrosis factor-α and interleukin-1β levels in the hippocampus on the ischemic *** addition,Shuan-Tong-Ling upregulated the expression of SIRT1 and Bcl-2 and downregulated the expression of acetylated-protein 53 and *** of 5 mg/kg silent information regulator 1（SIRT1） inhibitor EX527 into the subarachnoid space once every 2 days,four times,reversed the above *** results demonstrate that Shuan-Tong-Ling might benefit cerebral ischemia/reperfusion injury by reducing inflammation and apoptosis through activation of the SIRT1 signaling pathway.

关键词： nerve regeneration traditional Chinese medicine ferment Shuan-Tong-Ling middle cerebral artery occlusion cerebral ischemia/reperfusion silent information regulator 1 inflammation apoptosis tumor necrosis factor-alpha interleukin-1 beta Bcl-2 Bax acetylated-protein 53 neural regeneration

A swarm intelligence design based on a workshop of meta-synthetic engineering

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Frontiers of Information Technology & Electronic Engineering 2017年第1期18卷 149-152页

作者： Bo-hu LI Hui-yang QU Ting-yu LIN Bao-cun HOU Xiang ZHAI Guo-qiang SHI jun-hua zhou Chao RUAN The Second Academy of China Aerospace Science and Technology Corporation The State Key Laboratory of Intelligent Manufacturing System for Complex Products Beijing Aerospace Intelligent Manufacturing Technology Development Co. Ltd.

In this paper, we present a swarm intelligence design technology based on a workshop of meta-synthetic engineering, including the architecture, the decision-making process of swarm intelligence design based on a meta-synthetic workshop, and the design resource delivery technology involved in the design. We conclude the paper with a discussion of future research.

关键词： Meta-synthetic engineering Swarm intelligence Design resources delivery

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不同后倾角三维车辆的尾迹非定常流动分析

吉林大学学报（工学版） 2017年第3期47卷 717-724页

作者：崔文诗杨志刚王国俊周华同济大学上海市地面交通工具空气动力与热环境模拟重点实验室上海201804 同济大学上海地面交通工具风洞中心上海201804

为了控制车辆气动力和噪声,基于热线风速仪将流动与频谱法、相关分析方法结合,对不同后倾角(0°,25°和35°)的三维车辆尾迹非定常流动进行试验研究。0°模型主频数为2个,对应流向和侧向涡脱落作用;25°模型主频数为4个,对应流向涡脱落... 详细信息

为了控制车辆气动力和噪声,基于热线风速仪将流动与频谱法、相关分析方法结合,对不同后倾角(0°,25°和35°)的三维车辆尾迹非定常流动进行试验研究。0°模型主频数为2个,对应流向和侧向涡脱落作用;25°模型主频数为4个,对应流向涡脱落及其共振作用、C柱涡和斜背动态分离作用;35°模型主频数为3个,对应C柱涡和上、下流向涡脱落作用。结果表明,模型间存在差异的原因是后倾角的不同使得流动分离位置、斜背流动、C柱涡产生差异,进而导致主频数及其表征的非定常流动结构、空间分布规律不同。

关键词：车辆工程非定常流动尾迹涡脱落流动分离

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我国主要证券市场VaR模型变动性研究

技术经济与管理研究 2012年第3期 73-78页

作者：花俊洲上海金融学院上海201209

对证券市场风险度量模型的探索,一直是国内外金融风险管理者关注和研究的热点之一。VaR(Value-at-Risk)风险度量模型,目前已成为金融机构、非金融企业、金融监管部门测量和监控市场风险的主流工具。然而VaR模型能否有效正确地度量证券... 详细信息

对证券市场风险度量模型的探索,一直是国内外金融风险管理者关注和研究的热点之一。VaR(Value-at-Risk)风险度量模型,目前已成为金融机构、非金融企业、金融监管部门测量和监控市场风险的主流工具。然而VaR模型能否有效正确地度量证券市场风险,不但取决于估计的精度,还取决于选用VaR模型本身的变动性。因此,探索我国主要证券市场VaR模型的变动性,有一定的现实意义。针对我国主要证券市场指数,本文首先通过图形展示了三类(参数、半参数和非参数)VaR估计方法在不同的窗口设定下控制风险的表现;其次在平均相对偏差(MRB)和平方根相对偏差(RMSRB)的双重标准下,对三类VaR估计模型的变动性进行了比较研究,结果表明:在我国主要证券市场上,参数类VaR估计模型本身的变动性和偏离程度较小,半参数类VaR估计模型次之,而非参数类VaR估计模型本身的变动性和偏离程度较大,这在一定程度上符合新兴国家证券市场存在较大投机收益的特点。

关键词：证券市场 VaR 金融体系风险管理

Efficacy of deferoxamine in animal models of intracerebral hemorrhage:a systematic review and stratified meta-analysis

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Efficacy of deferoxamine in animal models of intracerebral h...

第十二次全国中西医结合实验医学专业委员会暨第七次湖南省中西医结合神经科专业委员会学术年会

作者： Han-Jin Cui Hao-yu He A-Li Yang hua-jun zhou Cong Wang Jie-Kun Luo Yuan Lin Tao Tang Institute of Integrative Medicine Xiangya Hospital Central South University Institute of Neurology Xiangya HospitalCentral South University Institute of Mental Health The Second Xiangya HospitalCentral South University Key Lab of Chinese Gan of SATCM Institute of Neurology The First College of Clinical Medical SciencesChina Three Gorges University

Intracerebral hemorrhage(ICH) is a subtype of stroke associated with high morbidity and mortality *** proven treatments are available for this ***-mediated free radical injury is assoc

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锂离子充放电平衡系统PI算法的应用研究

科学技术与工程 2017年第3期17卷 86-90,97页

作者：邓华军周士芸邓集萱安顺学院电子与信息工程学院安顺561000

针对传统的锂离子充放电平衡系统存在效果不理想的问题,提出PI算法对锂离子充放电平衡系统进行改进。以STC12C5A60S2为主控核心,由系统供电电路、BUCK电路、控制电路、显示电路、保护电路、充电方式选择电路组成。利用PI算法控制充电过... 详细信息

针对传统的锂离子充放电平衡系统存在效果不理想的问题,提出PI算法对锂离子充放电平衡系统进行改进。以STC12C5A60S2为主控核心,由系统供电电路、BUCK电路、控制电路、显示电路、保护电路、充电方式选择电路组成。利用PI算法控制充电过程中电流动态平衡,对软件进行设计,实现对锂离子充放电控制基本功能。实验对比分析可知,改进的系统可靠性好,实用性强,可作为各种小型电子设备的充放电装置。

关键词：锂离子充放电平衡系统 PI算法电流动态平衡供电电路控制电路充电方式选择

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen Yu Han jun Wang Shibo Xi Yu zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis