Results 31 to 40 of about 533 (119)
Jianzhu Gangjiegou Jinzhan, 2021 为适应现代结构不断向高耸、重载、大跨等方向发展的趋势,将内置型钢钢管混凝土应用于柱结构设计中。采用ABAQUS有限元软件建立内置型钢圆钢管混凝土轴压短柱受力全过程分析的数值模型,对已有的内置型钢钢管混凝土轴压构件承载力的试验数据进行计算和验证。分析了该类构件在轴压作用下的应力-应变全过程曲线、截面应力分布及各部件之间的相互作用力;探究了材料强度、型钢含钢率、钢管含钢率及型钢截面形式等主要参数对内置型钢钢管混凝土组合柱强度指标的影响规律。研究结果表明:内置型钢对核心混凝土形成了双重约束作用 ...
毛文婧, 史艳莉, 王文达
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Conservation Biology, Volume 39, Issue 3, June 2025.Abstract Globally, Indigenous peoples and local communities (IPs and LCs) are fighting for the recognition of their knowledge and decision‐making authority in freshwater conservation. In the Amazon, decision‐making around freshwater management and conservation has often overlooked Indigenous and local knowledge (ILK) and the connections between ...
Simone Athayde +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 以江西省鹰潭市的典型旱地、稻田和林地为研究对象，采用野外亮蓝染色示踪试验结合室内图像处理的方法，量化了各样地土壤剖面染色特征参数，明确了水流类型的剖面分布规律，并揭示了土壤理化性质对水流特征的影响机制。结果表明：染色面积比（SAR）随着土层深度的增加急剧降低，0-60 cm土层的平均SAR表现为稻田（28.16%）高于旱地（21.95%）和林地（18.64%），SAR差异主要体现在5-25 cm土层；染色路径数（SPN）随着土层深度的增加先增加后减小，整个剖面的平均SPN为稻田最多（20条），旱地其次 ...
张海林 +7 more
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Functional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 通过盆栽试验研究土壤菌对喷播基质物理性质及抗冲抗剪性能的影响。结果表明:土壤菌与黑麦草出苗率及盖度、容重、抗冲性、抗剪性4种基质效应指标之间存在着显著的相互作用关系。土壤菌的应用,明显增加土壤微生物量,基质结构基得到明显改善(基质容重降低了0.10 g/cm3),喷播植物的出苗率和盖度分别增加了55%和0.21,喷播基质抗冲抗剪能力得到改善,这既有微生物菌种对基质物理结构的改善作用,也有促进植物生长和覆盖对地表的保护作用。
王丽 +4 more
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Functional Ecology, Volume 39, Issue 4, Page 1096-1111, April 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Many invasive plant species have demonstrated a better ability to tolerate and accumulate heavy metals than their co‐occurring native plants. Given the potential biological toxicity of heavy metals to phytopathogens, we postulated that heavy metal contamination could ...
Tiantian Lin +7 more
wiley +1 more source
Amazonian conservation across archipelagos of Indigenous territories
Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Indigenous stewardship is essential to the conservation of biocultural diversity, yet conventional conservation models often treat Indigenous territories (ITs) as homogeneous or isolated units. We propose that archipelagos of Indigenous territories (AITs), clusters of ITs that span geographies but are connected through shared cultural or ...
Michael S. Esbach +3 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 以新型剪力墙钢结构体系作为考察方向，重点研究钢管混凝土束剪力墙、异形钢管混凝土墙柱和波纹钢板剪力墙3种结构形式，采用理论研究、模型试验、软件分析、技术集成和工程示范等相结合的技术手段，依据钢管混凝土束生产、采购等产品的后端技术数据分析，进行了标准化、模块化和集成化建筑设计探索，分别完成了关键结构构件承载性能、建筑外保温材料防火性能和围护系统连接方式的试验研究，提出了钢结构外围护、保温、防火相结合的成套做法，改进了钢结构剪力墙的制作设备和施工工法，开发了适应典型气候区域的新型剪力墙钢结构体系成套技术 ...
李真茂 +3 more
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Community perceptions of invasive species and environmental management in a US island territory
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Environmental managers struggle with communicating accurate and relevant information and with gaining trust from the communities they serve, problems that are especially pronounced in minority and colonized communities. An important step in developing successful management strategies is partnering directly with the communities involved, but ...
Ann Marie Gawel +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 以重庆中梁山岩溶山区为例,通过野外溶蚀试片法和测量土壤孔隙度、容重、水分、有机碳含量和pH值的方法,探讨雨季和全年不同土地利用方式下土壤性质变化及其对土下岩石溶蚀速率的影响。结果表明:不同季节不同土地利用方式下土下岩石溶蚀速率差异显著,雨季溶蚀速率要大于全年溶蚀速率,雨季溶蚀量对全年溶蚀量贡献较大,雨热同期有利于岩溶作用的进行。总体上,不同土地利用方式下土下岩石溶蚀速率大小顺序为:林地>草地>菜地>耕地,其中林地最大,耕地最小。土壤有机碳、pH值、孔隙度和水分等相互联系,相互作用共同影响土下岩石溶蚀速率。
蓝家程 +5 more
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