Results 31 to 40 of about 1,462,364 (156)
Shuitu Baochi Xuebao, 2006 以四川盆地西缘中低山坡地为研究样地，根据实际地貌特征分别选取3个典型山体、2个典型土壤类型。山体坡面不同坡位下土壤质量综合指数（PI）研究表明土壤质量指数随山体坡面位置相对海拔高度的降低而增高。不同利用方式下土壤质量综合指数（QI）研究表明，人工林的土壤质量指数值显著偏高，坡耕地的指数值最低。中低山坡地土壤质量的变化特征主要依赖于土地利用与覆盖之间的差异。故必须加强坡耕地规范治理，实施植被保护与重建等一系列土壤资源持续利用措施，实现土壤质量的持续健康发展。
高雪松, 邓良基, 张世熔, 曾敏
doaj +2 more sources
World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
wiley +1 more source
, 1994 选择湖南省常德市江北城区水体为代表开展本项研究。结果表明，水体中污染指示菌，总大肠菌群（ＴＣ）和粪大肠菌群（ＦＣ）密度同ＢＯＤ＿５负荷以及综合污染指数Ｐ呈高度正相关。所以，污染指示菌指标，特别是粪大肠菌群指标足综合评价城市污水，尤其是生活污水污染的一个必不可少的重要参数。对该城区水体细菌污染的评价结果是，生活污水排放愈集中的地区，细菌污染愈严重。其中护城河水的ＴＣ密度超出我国地面水Ⅲ级标准４个数量级；ＦＣ密度超过ＷＨＯ娱乐用水标准３个数量级。护城河是细菌污染最严重水体 ...
万登榜,丘昌强,马宁,孙兴湘
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International Journal of Applied Linguistics, Volume 36, Issue 4, Page 3294-3306, November 2026.ABSTRACT This study examines multilingual practices in research interviews, focusing on English lexical insertions in Chinese‐language research interviews with teachers of Chinese in Australian secondary schools, and treating these code‐switches as analytically meaningful rather than incidental.
Chengwen Yuan, Tianwei Zhang, Gary Bonar
wiley +1 more source
, 2021 为探究东北虎（Panthera tigris altaica）的生长发育特征，为东北虎的人工饲养以及野生东北虎的保护提供科学参考，测定了东北虎体重、胸围、腰围、肩高、臀高、体长、颈围和前后掌垫宽9个体尺参数，并对亚成体与成体东北虎体重及体尺参数的差异性及体重与体尺参数间的线性关系进行分析。结果表明：成体雄虎体重、体长、肩高、前掌垫宽及后掌垫宽均显著大于亚成体；成体雌虎臀高、胸围及腰围显著小于亚成体雌虎。4—5岁的东北虎，除体长、前掌垫宽和后掌垫宽以外，其他体尺参数均下降，5岁以后逐渐增长 ...
樊雪飞 2 +9 more
core
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
Gongye shui chuli, 2020 高锰酸盐指数是一个相对性的条件指标，不同的条件因素都会影响其测定结果。为找出准确测定高锰酸盐指数的方法，从实验用水、加热时间、高锰酸钾标准溶液的浓度、反应体系的酸度以及滴定条件的控制等方面进行分析，提出测定高锰酸盐指数的最佳条件，并指出测定过程中的注意事项，对准确测定高锰酸盐指数具有重要意义。
李兰芳 +4 more
doaj +2 more sources
Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Democratic governance faces the intertwined imperatives of managing the transformative risks and opportunities of digitalization, particularly stemming from artificial intelligence (AI), while achieving environmental sustainability within planetary boundaries.
Martino Maggetti
wiley +1 more source
野生动物学报, 2022 小型哺乳动物的身体和脏器重是动物对环境适应的近似指标,可随环境条件的变化进行适应性调整。以珠海市城区环境中分布的臭鼩(Suncus murinus)为研究对象,2019年5月—2021年3月测定其身体大小及脏器指数的性别差异和季节动态,以深入理解其脏器对环境的生理适应机制。结果显示:(1)臭鼩身体大小的性二态特征明显,雄性明显大于雌性 ...
母华强 陈 艳
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Zinc‐based biodegradable metals are promising implant materials, and additive manufacturing offers a powerful route for their patient‐specific fabrication. However, process‐induced surface defects can accelerate degradation and compromise biocompatibility, rendering post‐processing essential.
Yixuan Shi +13 more
wiley +1 more source