Results 101 to 110 of about 15,531 (185)
Accelerating Just Energy Transitions in Brazil: Pathways for Social Development
Latin American Policy, Volume 17, Issue 1, March 2026.ABSTRACT This critical article analyzes energy poverty in Brazil from the theoretical perspective of distributive justice, proposing the implementation of a new social regulation called Contribution to Social Development. The goal is to support the process of a just energy transition leading to a broader debate on energy planning and social issues ...
Marcio Giannini Pereira +5 more
wiley +1 more source
Assessment of wind-induced fatigue crack initiation life at guyed mast earplate joints considering welding residual stresses [PDF]
, 2010 A new method for assessing the degree of the cumulative fatigue crack initiation damage of the welds of earplate joints of a guyed mast,which connect the mast with the cable,is proposed.Based on the multi-scale wind-induced stress analysis of the ...
Pi, Y, Qu, W, Wang, W
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Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT This study examines the paradoxical relationship between policy learning and capacity: governments need certain capacities to learn effectively, yet these same capacities often emerge from previous learning experiences. Through a comparative analysis of Hong Kong and Singapore's responses to SARS and COVID‐19, we demonstrate how policy ...
Shubham Sharma, Xun Wu, Gleb Papyshev
wiley +1 more source
基于LS-DYNA的CT14高压断路器弹簧操动机构仿真与应力分析
Gaoya dianqi, 2017 弹簧操动机构是CT14高压断路器的关键部件,其技术性能的优劣对断路器影响重大。根据CT14高压断路器操动系统的结构尺寸及其三维实体模型,通过Hyper Mesh软件进行了有限元建模。基于系统中存在凸轮与滚轮的非线性碰撞以及操动过程中大位移、大转动、大变形等特点,选用LS-DYNA软件作为应力分析计算的工具,得到了断路器操动机构在弹簧冲击载荷作用下的应力分布情况,以及各个零部件在操动过程中的应力动态变化。分析了应力分布及其动态变化对断路器动力学性能的影响 ...
刘荣海 +6 more
doaj
on-line structural damage identification method base on kalman estimator and least-square estimation [PDF]
, 2011 通过系统识别跟踪结构动力参数的改变来进行损伤识别是结构损伤诊断的重要研究方向。然而，传统的损伤识别方法只能识别时不变参数，无法在线跟踪结构参数的改变，本文提出了一种输入和输出部分观测下基于卡尔曼预测估计和最小二乘估计的损伤在线识别方法。 论文总结了前人在损伤识别和损伤在线识别方面的研究进展，并针对现有损伤在线识别方法的不足，提出了新的损伤在线识别方法。本文分已知激励和未知激励两部分对该方法进行详细阐述和验证。在已知激励下，首先，通过扩展卡尔曼预测估计对结构的动力参数，如刚度和阻尼系数等进行识别 ...
毛亦可
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Study on the dynamic response characteristics of surrounding rock in high stress tunnel under blasting disturbance [PDF]
This research delves into the mechanical response of surrounding rock in deep coal mine roadways under high static and dynamic loads, utilizing similarity simulation experiments.
Bowen WU +6 more
core +1 more source
Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Peng‐Zhen Fan +17 more
wiley +1 more source
Surface Sediment Grain-Size Characteristic and Its Indicative Significance on Quanzhou Sea Area in the Taiwan Strait [PDF]
, 2016 沉积物粒度是沉积地质学中一项重要的动力指标，不同物质来源和沉积环境具有不同的沉积物粒度参数特征及其组合。本文通过分析台湾海峡泉州幅609个表层沉积物类型、粒度含量及粒度参数分布特征，利用粒度数据提取粒级组分信息，其中包括EMMA法、Weibull密度函数拟合法及粒度-标准方差法的运用与对比，并运用粒度趋势分析方法对泉州幅沉积物净运移趋势进行分析，结合浙闽沿岸流、台湾暖流、台湾岛西岸及闽东河流物质的输入背景，反演台湾海峡泉州幅的沉积环境，同时区分不同海域主要物质来源 ...
梁群峰
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Weaving knowledges to support wildlife health surveillance in Kenya's pastoral rangelands
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract In wildlife–livestock–human interfaces, pathogens capable of spreading between wild and domestic animals and humans have important implications for conservation outcomes, economics, and public health. Robust wildlife health surveillance can help address these risks.
Brock Bersaglio +4 more
wiley +1 more source
, 2007 建立了水中悬浮隧道锚索在波流场中涡激振动的非线性数学模型,考虑了锚索的几何非线性对其涡激振动的影响,并应用有限差分法求解了锚索的运动控制方程。计算结果表明:锚索在顺流向和横向2个方向运动的耦合作用特别是几何非线性作用的引入,抑制了部分高阶模态的激发,使锚索横向涡激振动的振幅减小,顺流向振动的振幅增大;在悬浮隧道的振动引起的强迫激励和参数激励作用下,锚索顺流向涡激振动振幅显著增大,横向涡激振动出现"拍 ...
惠磊, 洪友士, 葛斐
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