Results 21 to 30 of about 11,169 (131)
People and Nature, Volume 7, Issue 11, Page 2700-2713, November 2025.Abstract Large old trees are important ecological entities in human settlements, providing cultural values and ecological services that are threatened by current and future changes in global climate, land use and disturbance regimes. Some studies suggest incorporating social and cultural significance into the conservation of large old trees.
Zhuo Cheng +5 more
wiley +1 more source
Rare Metals, Volume 44, Issue 11, Page 8161-8197, November 2025.Graphical abstract AbstractThe studies on the synthesis of two‐dimensional (2D) Janus materials have made significant progress over the years. They offer new opportunities to increase the potential usage of Janus transition metal dichalcogenide (TMDC) materials in different application areas due to their unique structural, electrical, optical and ...
Ayça Coşkun +9 more
wiley +1 more source
Shiyou jixie, 2014 为了扩展现有井下工具的适用性与可靠性，为高温、高压、强腐蚀环境下油气资源的开发提供技术储备，针对用于井下工具密封的金属对金属密封技术展开了研究。设计了金属对金属密封组件的结构，并对密封组件的密封原理进行分析。通过有限元方法计算了密封组件在有外层套管约束下的变形和受力情况，确定了密封套筒的变形形状、所需要的下压载荷和下压行程之间的关系。进行了金属对金属密封组件在套管内坐封和试压试验。试验结果表明，下压载荷与下压行程的关系与仿真结果非常接近，坐封后的金属对金属密封组件的环空密封能力达到60 MPa ...
崔晓杰, 张瑞, 韩峰, 马兰荣
doaj
Improvements for better scaling of locally managed marine areas
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract To protect and restore ecosystems at the speed and scale required to meet current environmental challenges, a greater understanding of how conservation initiatives spread from existing to new adopters is required. According to the diffusion of innovation theory, positive adopter‐to‐peer communication is a powerful driver of innovation spread ...
Emily Lewis‐Brown +6 more
wiley +1 more source
Functional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang +10 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2012 钢管混凝土具有诸多优点,使其得到广泛的应用和研究。但也有缺点,如钢材的耐腐蚀性差,导致其后期维护费用较大。由于高强钢可以有效地减小构件的尺寸和结构的重量,不锈钢具有良好的耐腐蚀性能,铝合金具有外表美观、防腐蚀等优点,因此在上述3种金属管中填充混凝土形成新型金属管混凝土结构,具有广泛的应用前景。主要研究了3种金属管混凝土短柱的强度计算公式,并通过有限元模拟验证了公式的正确性。
查晓雄, 宫永丽
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Hydraulic traits are coordinated but decoupled from carbon traits in herbaceous species
Functional Ecology, Volume 39, Issue 5, Page 1302-1317, May 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant hydraulic traits primarily define the water regulation strategy, thus enabling a better understanding of vegetation structure, function and dynamics under varying hydro‐environments.
Ruike Huang +9 more
wiley +1 more source
Dianci bileiqi, 2002 根据金属氧化物避雷器的发展及分类 ,提出金属氧化物避雷器的选用中应注意参数的正确选择。并结合金属氧化物避雷器应用中的密封老化、瓷套污染等问题 ,提出了加强金属氧化物避雷器的技术管理及电网的谐波治理 ,增强避雷器的在线监测力度等措施。
周志敏
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Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Emerging infectious diseases are increasingly recognized as a significant threat to global biodiversity conservation. Elucidating the relationship between pathogens and the host microbiome could lead to novel approaches for mitigating disease impacts.
Alexander S. Romer +25 more
wiley +1 more source
Dianci bileiqi, 2017 动车组高压套管作为连接车载变压器和车顶高压电缆的主要绝缘设备,其可靠性直接影响动车组的运行可靠性。基于ANSYS有限元软件分析了高压套管的电场分布特性,通过分析高压套管的电位和电场分布情况,掌握工作状态下高压套管的工作特性。结果表明,高压套管内置的金属屏蔽网可以改善接地法兰附近的电场分布,但内置的金属屏蔽网边缘附件的电场强度分布较大,一旦出现网压过高时,金属屏蔽网上下边缘处可能是最先发生局部放电,甚至绝缘击穿,因此可以通过合理选择高压套管的耐压等级或合理优化套管结构降低高压套管的故障率 ...
张士宇, 马昭钰, 周博, 郭英强
doaj