Results 21 to 30 of about 10,948 (106)
Shuitu Baochi Xuebao, 2004 采用GIS技术与层次分析法相结合,对湖南省生态环境质量状况进行了综合评价。通过建立综合评价的指标体系和基本评价单元,应用层次分析法确定各评价指标的权重,再运用GIS技术,计算评价单元的质量指数和分指数,自动生成湖南省生态环境综合评价等级图,并从自然环境、灾害状况、环境污染和社会经济状况方面进行了空间分界规律分析。结果表明,社会经济与自然环境状况的空间格局大体吻合,湖南省生态环境质量基本上由东向西逐渐降低,但局部地区有差异。说明自然条件对湖南省生态环境质量的空间分异起主要作用,但灾害状况 ...
熊鹰 王克林 黄道友
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Understanding learners’ English speaking self‐efficacy is essential for promoting effective oral communication in EFL contexts. However, variable‐centered research on English speaking self‐efficacy often overlooks heterogeneity among learners.
Cha Li, Lawrence Jun Zhang
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Osteoarthritis (OA) therapy remains constrained by the coexistence of irreversible cartilage loss and a persistently hostile joint microenvironment characterized by oxidative stress, synovial inflammation, and impaired tissue‐regenerative signaling.
Xinyu Wu +11 more
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Overdischarge Induced Porous Graphite for Upcycling of Spent Lithium‐Ion Batteries
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The upcycling of spent lithium‐ion batteries (LIBs) into high‐performance materials offers both economic and environmental benefits. In this study, the principle of battery discharge‐induced copper dissolution and deposition is applied to fabricate a graphite/nanocopper composite anode.
Yadong Wang +13 more
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World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
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Shuitu Baochi Xuebao, 2003 通过研究比较不同植被类型下土壤中微生物区系、土壤酶活性和土壤生化作用强度,分析了贵州高原喀斯特环境退化演变过程中土壤质量的生物学特性变化过程。结果表明:随喀斯特环境退化程度加剧,土壤微生物总数下降,各主要生理类群数量呈下降趋势,土壤酶活性减弱,土壤生化作用强度降低,对环境反应敏感,可作为反映土壤质量的生物学指标。土壤微生物和酶活性是表征喀斯特环境退化演替过程中土壤质量的重要特征之一。
龙健 李娟 滕应 黄昌勇
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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
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Microstructural characterization of Li0.32La0.56Fe0.01Ti0.94Sb0.06O3 (LLFeTSO) using AC‐TEM revealed that Fe3+/Sb3+ ion co‐doping induces the migration of lattice oxygen to grain boundaries (GBs), enhancing GB conductivity. However, the atomic arrangement at the GBs remains highly ordered and lacks sufficient cation vacancy carriers.
Binxuan Jiang +8 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Multifunctional thermal protective ceramic thermal/environmental barrier coatings (T/EBCs) are of great significance for applications of various high‐temperature components, and we propose an effective strategy for designing high‐entropy ceramics (HECs) as T/EBCs for SiC ceramic matrix composites (CMCs), where low thermal expansion ...
Qinshuo Wang +7 more
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Shuitu Baochi Xuebao目的综合评估西柳沟流域长时间序列下景观格局指数及生境质量现状变化，为合理制定生态修复方案，促进流域生态经济的可持续发展提供理论依据。方法选取2000年、2005年、2010年、2015年、2020年5个时段，基于Fragstats、InVEST模型和地理探测器对西柳沟流域景观格局指数、生境质量现状及其驱动力因素进行分析。结果1）2000—2020年研究区景观呈明显的聚集化与同质化的变化趋势，主要表现为草地扩张、景观破碎度降低、边缘复杂度下降和多样性减少 ...
张锦鑫 +7 more
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