Results 11 to 20 of about 30,971 (191)
European Policy Analysis, EarlyView.ABSTRACT Over the past decade, the concept of “instrument constituency” has been proposed as a way in which to bridge studies on policy networks and policy instruments. This concept focuses on policy networks composed of diverse actors who are brought together by the shared goal of promoting a specific instrument.
Noémie Morize
wiley +1 more source
Integrative Conservation, EarlyView.This research reveals the functional stability of mixed species foraging flocks (MSF) and their foraging height change with different taxonomic differences along the elevational gradient at Knuckles Montane Reserve, Sri Lanka. This offers new insights into how MSFs sustain with the elevational gradients supporting the altitudinal shifting species ...
Vimukthi. R. Gunasekeara +3 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Test and Research on the Rheological Damage Properties of Sandstone under Dynamic stress field-Seepage field coupling [PDF]
, 2016 机械振动、交通荷载、地震等产生的动应力场与降雨等因素所产生的渗流场耦合，会加快软岩的流变损伤，导致滑坡、崩塌、泥石流等严重的地质灾害。因此，加强对动应力场-渗流场耦合作用下软弱岩体的动态流变损伤特性的研究具有重要的理论和实际意义。论文以软弱砂岩为研究对象，利用重庆大学煤炭灾害与控制国家重点实验室的RLW-2000M煤岩三轴流变试验机研究了砂岩在动应力场-渗流场耦合作用下的动态流变损伤特性。具体的研究内容如下： (1)通过采集-钻芯-切割-打磨-浸泡等过程制备饱和的砂岩试样，根据砂岩试样的全应力 ...
蔡亮
core
Dynamic Behaviors of Water Droplets on H2/Air PEMFC Gas Diffusion Layer Surface: VOF Simulations [PDF]
, 2017 在研发和设计H2/空气质子交换膜燃料电池时，如何促进扩散介质及气流通道内液态水的传输是需要考虑的主要问题之一.本文运用FLUENT软件流体体积(VOF)模块模拟了燃料电池气体扩散层表面液滴的形成、脱落及输运行为.液滴受气体剪切力、粘滞力和表面张力的共同影响，对不同的壁面浸润角和不同的气体剪切力，呈现出复杂的液滴动力学行为.考察了通道气体流速和扩散层表面浸润力对液滴行为的影响.结果表明，增大扩散层表面浸润角或入口气流速度均可以促进扩散层表面液滴的跃离，前者对液滴跃离的促进作用更大 ...
蒋方明, 陈旺
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Rare Metals, EarlyView.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
wiley +1 more source
Research on Sparse Localized Decomposition Algorithm of Mesh Deformation Gradients [PDF]
, 2015 随着三维动画行业的发展，以数据驱动为主的一类动画制作技术如3D扫描、动作捕捉等开始被人们广泛关注和应用。使用这些技术能够快速地得到高质量的几何模型和动画效果，在很大程度上提高了整体三维动画制作的水平，使得三维动画产品得到了更为普遍的应用。然而，由于捕捉数据的复杂性，使得人们很难对这些数据进行直接、有效的操作和再利用。近年来的许多研究围绕如何从这些复杂数据集尤其是动画序列集中计算出一组低维控制参数，以便用户可以有效地进行数据集的操作、编辑甚至创建出新的网格模型或动画 ...
黄志超
core
Rare Metals, EarlyView.ABSTRACT Nb‐Si‐based superalloys are considered as the most potential candidate materials for nickel‐based superalloys due to the lower density and higher using temperature. Here, a type of stable Nbss/γNb5Si3 bi‐phases structure with a coherent interface has been successfully designed. Additionally, the Nbss and γNb5Si3 phases showcase the orientation
Xiao‐Wei Wang +6 more
wiley +1 more source
Gaoya dianqi, 2017 电力变压器短路故障产生的短路冲击会造成绕组变形,限制系统短路电流对降低变压器绕组动态变形意义重大。文中以110 kV电压等级的三绕组电力变压器为例,中压绕组发生出口短路故障时,基于磁—力学耦合场研究方法,对变阻抗变压器和常规变压器绕组动态变形进行数值分析。变阻抗变压器的研究包括变压器本体和限流电抗器2部分,分析了短路电流作用下,变压器绕组和限流电抗器线圈的变形、动态应力、位移。常规变压器和变阻抗变压器绕组变形的对比可得变阻抗变压器变形量较小。分析结果为变阻抗变压器绕组变形状态评估提供参考依据。
杜玮 +6 more
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Gaoya dianqi, 2022 研究高压开关常用O形橡胶圈在T形槽和矩形槽气体密封结构的工作受力变形、密封效果及可靠性。利用数值模拟软件建立高压开关常用O形橡胶圈在T形槽和矩形槽气体密封结构模型,对比相同O形橡胶圈在两种气体密封结构,相同压缩率、相同气体压力的变形及受力情况。O形橡胶圈在矩形槽气体密封结构的应力、应变集中在中心区域,而其在T形槽气体密封结构的应力、应变不集中在中心区域。O形橡胶圈的实际缺陷多分布在中心区域,T形槽气体密封结构可以避免O形橡胶圈的应力、应变集中在中心区域。虽然矩形槽气体密封结构具有易加工、易装配的特性 ...
张鑫, 魏雅君, 涂德华
doaj