Results 31 to 40 of about 1,864,559 (165)
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT VO2 is a promising thermochromic material, but it is still limited by low transparency, weak solar modulation, and poor stability. Here, we develop a coordination‐compound‐derived strategy to construct a hierarchical BiVO4/VO2@BiVO4 film with a core–shell@nanosheet structure.
Huiyan Xu +11 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2016 H形钢悬臂柱柱脚焊缝的疲劳性能对钢柱疲劳寿命起控制作用,应用热点应力的表面外推法,通过建立数值计算模型,对弯矩、扭矩和弯扭共同作用下柱脚焊缝热点应力进行了分析。选取翼缘与底板厚度比(t1/t2)、翼缘和腹板厚度比(t1/t3)、腹板厚度(t3)与型钢截面高度(h)作为影响因素,对热点应力集中系数SCFhs进行参数分析。分析结果表明,其它条件不变的情况下,弯矩作用下的热点应力集中系数SCFmhs随着(t1/t3)和(t3)的增大而减小,但与(t1/t2)关系不大,h增加可导致SCFhs增大,建议取为1 ...
张晨阳, 芦燕
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Titanium (Ti)–steel composite joints are prone to the formation of compounds such as TiC, TiFe, and TiFe2 during solid‐phase bonding. This phenomenon leads to premature failure and significantly reduces the bonding quality of the joints. However, the fracture behavior of the joint influenced by these compounds, particularly on the initiation ...
Sheng Zeng +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2018 坡面水流的输沙能力是影响土壤侵蚀过程的重要参数之一，加强坡面集中水流输沙能力的研究有助于深入理解集中流发生机理，并为防治集中流侵蚀发生提供科学依据。采用室内集中流放水冲刷试验，以黄土高原典型黄绵土为研究对象，研究了集中流输沙能力与放水流量和坡度以及与单宽流量和坡度之间的关系，同时对集中流水力参数和输沙能力的相应关系进行了研究。结果表明:集中流输沙能力随着坡度和放水流量的增加而增加。多元统计分析建立输沙能力与坡度和放水流量之间的幂函数关系发现坡度指标对输沙能力相对放水流量影响更大，而在坡度和单宽流量作用下，
师宏强, 谷
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Functional Ecology, Volume 40, Issue 6, Page 1906-1920, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Human‐driven landscape change, particularly urbanization, is reshaping pollinator communities, yet the functional traits that mediate species persistence remain poorly understood. Dietary specialization is commonly used to predict species vulnerability.
Yan Yang +5 more
wiley +1 more source
, 2005 借助CDEM(continuous-baseddiscreteelementmethod)数值计算方法,数值模拟了边坡地应力模型试验。模拟边坡地应力模型试验结果表明:边坡某点的深度对地应力影响较大,随着深度的增加相应点处的竖向地应力偏离理论值越多。到了一定深度以后,这种影响明显减小。边坡角对地应力也有一定的影响,随着坡角的加大、某深度处的竖向地应力偏离理论值越厉害 ...
张俊红, 练振中
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Effects of parachute science on local research capacity 降落伞科学对当地研究能力的影响
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Strengthening research capacity is essential to address the global biodiversity crisis. Yet, parachute science often undermines this goal, and its prevalence, costs, and benefits are unclear. We analyzed 13,502 publications on primate research that we extracted from Scopus (1960–2022) to evaluate the effects of parachute science on local ...
Li Yang +11 more
wiley +1 more source
, 2009 通过统一的计算流体力学(CFD)与颗粒离散元(DEM)相结合的方法对典型风沙流场中近沙床的颗粒运动进行了二维数值模拟。气相湍流采用了K-E模型，颗粒的碰撞采用了软球模型。对计算结果的统计发现，颗粒的碰撞仅存在于沙床上方7mm以下，但是4$\sim$7mm为过渡层，颗粒穿越过渡层发生的碰撞是随机的。颗粒雷诺应力存在于沙床上方250mm以下，随着高度的增加，颗粒雷诺应力急剧下降。在沙床高度250mm以上，只有气相剪切应力起作用。这时，颗粒的浓度非常低，虽然颗粒和气相之间仍然有速度差 ...
杨杰程, 刘大有, 张宇
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Shiyou jixie, 2015 压缩机曲轴在工作中受力情况极为复杂，曲轴作为压缩机最重要的零部件之一，一旦失效将会导致整个压缩机的损坏。鉴于此，以2RDS压缩机曲轴为例，采用INVENTOR三维建模软件建立曲轴模型，使用有限元分析软件ABAQUS对其进行应力分析。分析结果表明，曲轴的应力最大位置均出现在主轴颈-I的油孔处，在曲柄与曲柄销和主轴颈与曲柄销过渡圆角处均出现了应力集中，但是最大应力均小于材料的许用应力，结构不会出现静强度破坏。曲轴在压工况时的受力比拉工况时的受力更加恶劣，应力集中情况更加严重 ...
侯小兵
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