Results 21 to 30 of about 17,412 (176)
Study on dynamic response of saturated soil around piles under vertical vibration [PDF]
A coupled pile-saturated soil model is proposed to investigate the response of saturated soil under three-dimensional axisymmetric conditions based on Biot's theory of saturated porous media.
FU Pengcheng1, 2 , WU Juntao1, 2 , YI Enze1, 2, WANG Kuihua1, 2, ZHANG Zhiqing3, TANG Lüjun4
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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, EarlyView.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
Wet-towing coupled dynamic response of three-bucket jacket foundation of offshore wind power [PDF]
ObjectiveTo improve the safety of wet-towing transportation for offshore wind power multi-bucket jacket foundations, it is necessary to explore the stability and dynamic response during the wet-towing transportation.MethodsA hydrodynamic model was ...
Disheng LIANG, Puyang ZHANG, Xiling QI
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Conservation Biology, EarlyView.Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch +6 more
wiley +1 more source
Gaoya dianqi, 2022 海上换流阀在运行期间的安全性关系到海洋风电的有效输送。为研究支撑式海上换流阀塔运行期间的结构响应，依据某工程中的海上柔直换流阀建立有限元模型，通过模态分析和时程分析，研究了换流阀塔的自身振动特性和在环境荷载作用下的动力响应。结果表明，换流阀塔弱轴振动方向为连接前后两个单塔的方向，外荷载作用下将在此方向产生较大动力响应，换流阀塔运行期间的最大位移和最大应力均满足安全要求。
马志荣 +8 more
doaj
Zhejiang Daxue xuebao. Lixue ban, 2003 本文提出的加肋穹顶索杆结构是一种极有潜力的新型空间结构,为深入了解该类结构的特性,使其能应用于工程实践,对它的动力性能进行了分析.文中采用子空间迭代法及时程法对结构进行计算.首先分析了各种布索下的结构频率及布索但不施加预应力情况下结构的动力性能;接着对结构在7种布索工况下的动内力进行了分析,取得了不同位置的索对结构刚度影响的差异;最后,为进一步探讨该种结构的动力性能,分别就5种矢跨比下结构的动内力进行了比较和分析,取得了结构内力变化相对平缓的结果.由此得出了索的不同布置对结构频率有明显影响 ...
GAOBo-qing(高博青) +2 more
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The collective application of shorebird tracking data to conservation
Conservation Biology, EarlyView.Abstract Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence‐based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership
Autumn‐Lynn Harrison +71 more
wiley +1 more source
Dizhen xuebao采用高精度间接边界元方法（IBEM）开展了山体−隔震层−隧道的整体响应分析，研究了P波入射下柔性隔震层对高斯形山体内双线隧道地震动响应的减弱作用。在隔震层与围岩之间考虑了碎土的错动滑移，以模拟不完美交界面，并系统讨论了隔震层弹性模量、厚度、P波入射频率等因素对隧道地震动响应的影响。数值模拟结果表明：适当增加隔震层厚度可以显著降低隧道应力，有效提升隔震效果，应力降低幅度约达50%以上，且使得结构受力更为均匀；随着隔震层材料的弹性模量减小，隧道动应力数值明显减小，有效减少了其应力放大区的面积 ...
Lei Huang +5 more
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Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source