Results 11 to 20 of about 173,503 (241)
Using porous metals to enhance heat transfer in phase change materials (PCMs) [PDF]
, 2011 Heat transfer enhancement mechanism of Phase Change Materials (PCMs) by high-porosity metal foams was investigated in this study. The Darcy-Brinkman-Forchheimer modified flow model was employed in the numerical simulations to consider the non-Darcy ...
Tian, Y. (Yuan), Zhao, Changying
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Journal of Adolescence, EarlyView.ABSTRACT Introduction Following rapid iterations in media technologies, Chinese millennials (born between 1980 and 1995) find themselves in a paradoxical state where digital saturation exists alongside fatigue, making them central practitioners of digital minimalist behavior.
Chao Zhang, Yinze Hao, Jingwen Li
wiley +1 more source
The Performance-based Seismic Design Of Tall Frame-Tube Wall Structure Based On Yield Mechanism [PDF]
, 2016 随着科技和经济的发展，对于高层建筑结构的抗震设计提出了更高的要求，从以往的单纯满足规范要求的指令式的设计方式，转变为满足不同抗震性能要求的设计方式，特别是抗震性能设计思想被引入规范之后，针对高层超限结构往往需要进行性能设计。但现在的性能设计主要还是停留在构件层次，即小震、中震、大震下对应结构构件应该达到怎样的性能目标，这往往使结构性能设计仅局限于构件层次。而从屈服机制角度来探讨结构的抗震性能，实际将构件层次与整体结构层次连系起来，使得结构整体性能目标的确定更加明确，而且更易于构件控制 ...
陈家伟
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Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, EarlyView.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
wiley +1 more source
, 2006 順位情報に基づいた新しい独立成分分析法（rankICA）を提案する．rankICAとは，まず，2信号の順位関係から順位表を作り，次に，順位表のすべてのデータペア間のマンハッタン距離のヒストグラムを作成し，最後に，そのヒストグラムをコントラスト関数で評価することで2信号間の独立性の尺度を得て独立成分分析を実行する方法である．本論文では，アルゴリズムの紹介をしたあと，どのようなコントラスト関数を用いるのが適当であるかを実験的に検討し，比較的良い結果が得られるコントラスト関数を提示する．また ...
Kota TAKAHASHI, 高橋 弘太
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People and Nature, EarlyView.Abstract Active outdoor play has been positioned in the literature as an opportunity to address concerns over climate (in)action and the rising trend of disconnection from the outdoors and nature. The objective of this systematic review was to examine associations between active outdoor play and people's connection to nature and/or environmental ...
Louise de Lannoy +10 more
wiley +1 more source
Gaoya dianqi, 2020 热塑性材料基于材料性能高、环保性好和成型工艺简单等优点,逐渐成为行业内积极研究用于取代环氧树脂的新型绝缘材料之一。目前国内外尚未针对应用于高压电器绝缘件制造的热塑性材料形成体系性的技术要求。文中选择了4种玻纤增强热塑性材料,从机械性能、电学性能和热学性能三方面与环氧树脂进行对比,同时研究玻纤在塑料注射成型中的取向和吸水性对材料性能的影响。结果表明,热塑性材料具有良好的机械、电学和热学性能,随着玻纤取向的增大,机械性能不断降低。为热塑性材料在高压电器设备中的应用提供技术基础。
谢雷钢, 张骁萌, 闵超
doaj
Conservation Funding at the Local Level 地方层面的保护资金
Wildlife Letters, EarlyView.Direct conservation fund transfer to local communities ensures the involvement of these communities in decision‐making and fund utilisation, which will ultimately lead to effective biodiversity conservation. A Cakchiquel family in the hamlet of Patzutzun, Guatemala, 1993. Credits: John Issac. Source: UNEP‐WCMC Internal Resources.
Jithu K Jose
wiley +1 more source
Fenmo yejin jishu, 2022 表面改性是使材料表面获得与其基体不同微观组织的处理技术，能够有效调控材料表面的力学性能。因此，将表面改性方法应用于改善硬质合金表面的微观组织，能够有效避免均匀结构硬质合金显微结构–宏观性能的局限性，为制备高性能非均匀结构硬质合金提供技术方案。由于硬质合金表面改性研究的起步较晚且表面改性方法较多，表面改性方法的选取及其改性机理依然面临思路不清的问题。本文总结了化学表面改性梯度硬质合金的材料体系、制备机理、微观结构及力学性能，概括了物理表面改性得到的硬质合金涂层方法与功能 ...
陈健 +4 more
doaj +1 more source
Evolutionary algorithms in dynamic environments [PDF]
, 2006 The file attached to this record is the author's final peer reviewed version.Evolutionary algorithms (EAs) are widely and often used for solving stationary optimization problems where the fitness landscape or objective function does not change during the
Wang, Dingwei +2 more
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