Results 41 to 50 of about 8,624 (160)
Analysis of Carbon Stock Evolution and Its Vulnerability Characteristics Based on Land Use Change in Guizhou Province [PDF]
, 2023 [Objective] The spatial and temporal distribution pattern and evolution characteristics of ecosystem carbon storage, its response to land use change, and the vulnerability of ecosystem carbon storage service in each county of Guizhou Province were ...
Chen Darong +5 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Low conductivity and poor oxygen reduction reaction (ORR) catalytic activity limit the bifunctional catalytic performance of layered double hydroxide (LDH) in zinc–air batteries. In this work, an efficient bifunctional electrocatalyst was prepared by loading nitrogen and phosphorus co‐doped carbon quantum dots (NPCQDs) onto a cationic‐vacancy ...
Wenhao Tang +4 more
wiley +1 more source
, 2018 随着社会经济的发展和人们生活方式的转变,慢性病发病率不断攀升,已成为严重困扰个人、家庭和社会的焦点问题。在世界范围内,2010年估计有3450万人死于慢性病,较20年前有明显的增加[1]。目前我国慢性病患者已超过2亿人,占总人口的20%以上,其中,2012年我国18岁及以上成人高血压、糖尿病、慢性阻塞性肺病患病率分别为25.3%、9.7%、9.9%,厦门市科技计划项目 ...
叶子容, 周鼒, 方亚, 陈佳
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Public perception of Ghana's Free Senior High School policy: A north–south comparative analysis
Review of Policy Research, Volume 43, Issue 1, January 2026.Abstract Ghana's Free Senior High School (SHS) policy, implemented in 2017, aims to increase access to secondary education, promote equity, enhance educational outcomes, and foster human capital development. This study examines public perception of the Free SHS policy, focusing on the variations between the northern and southern regions of Ghana and ...
Michael K. Dzordzormenyoh +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2003 植被的分布格局与土壤性质空间异质性密切相关。对降水小于200mm地区的沙坡头无灌溉条件下流沙固定过程中土壤性质的空间变化进行了研究。结果表明,随固沙植物群落的演变和土壤成土环境的改善与生物地球化学循环过程的加强,土壤性质发生了显著的变化:(1)固沙区土壤机械组成中粘粒(<0.001mm)含量、土壤水溶性盐(EC电导率)、pH、有机质和全氮含量都较流沙区有很大提高,且差异显著(p<0.05);固沙区土壤剖面性质的改变主要发生在结皮层和0～5cm的表层(topsoil),受表层土壤发育的影响5 ...
贾晓红 李新荣 王新平 樊恒文 赵金龙
doaj +2 more sources
The econometric analysis and countermeasure choice of PM2.5 pollution in China [PDF]
, 2017 近些年来，随着我国经济社会的快速发展，全国各省市均出现大规模的PM2.5污染。由于我国幅员辽阔，不同区域的经济社会情况存在显著差异。因此，本文从区域差异的角度出发，研究PM2.5污染的空间异质性、空间溢出性和影响因素。论文主要内容如下： （1）第一章阐述了PM2.5污染产生的背景，对国内外文献进行总结，发现影响PM2.5排放的主要因素，并对主要研究方法进行总结，提出本文可能的创新点。 （2）第二章运用地理加权回归模型研究PM2.5排放的空间异质性。首先介绍地理加权回归模型的基本理论；其次对各省PM2 ...
姚振宇
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High-throughput Sequencing Analysis of Diversity and Spatial Heterogeneity of Fungal Community in Pit Muds of Different Ages for Baijiu Production [PDF]
The fungal community structure, the relationship between fungal flora and physicochemical factors, and the prediction of fungal function in pit muds from different spatial positions of 10- and 50-year-old cellars at Jinhui liquor Co. Ltd. were studied by
REN Haiwei, LI Zhijuan, LIU Meiqi, CAI Zaoning, SUN Yifan, GUO Xiaopeng, FAN Wenguang, ZHANG Bingyun, LI Yantao, WEI Junqiang
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Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛) +8 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2014 在地统计和GIS的支持下，以半方差函数为工具，研究了豫中烤烟种植区烟叶氯含量和土壤养分的空间变异性特征，并进行相关分析.运用普通克立格法进行最优无偏线性插值，制作了研究区内烤烟烟叶中氯含量和不同土壤养分的空间分布图.结果表明：研究区内烤烟烟叶中氯含量符合指数模型，其空间变异性受结构性的因素影响较大.土壤属性中，土壤全磷、有效氮、速效钾、氯含量为中等程度的空间变异性，其余的都为弱空间变异性；分维数最高的是土壤有效氮和阳离子交换量，最低的是有机质、pH和硅.相关性分析表明，烟叶氯含量与土壤pH、土壤Cl ...
CHENHaisheng(陈海生) +1 more
doaj +1 more source