Results 11 to 20 of about 10,026 (174)
Climatic Long Term Trend and Prediction of the Wind Energy Resource in the Gwadar Port [PDF]
, 2017 利用欧洲中期天气预报中心的ERA-Interim海表10m风场资料，计算巴基斯坦瓜达尔港的风能资源近36年(1979—2014年)期间的历史变化趋势，并利用线性回归和BP神经网络两种方法，对该港的风能资源进行长期年度预测，得到以下结果。1)瓜达尔港夏季的风能资源比冬季丰富，且夏季的稳定性明显好于冬季。2)近36年期间，风能密度、有效风速频率和100W/m2以上能级频率分别以?0.78W/(m2·a)，?0.21%/a和?0.22%/a的速度逐年显著递减，且该趋势主要体现在夏季，冬季无显著变化趋势 ...
郑崇伟, 陈璇, 高悦
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Research of Retrieving Sea Surface Wind Vectors Based on Sentinel-1A Satellite SAR Images [PDF]
, 2016 海面风场是海气交互界面的重要物理参数，与海洋中绝大多数的海水运动密切相关。海面风场还是海气相互作用的重要媒介，调节了海水和大气之间的物质以及能量输送，对全球气候调节也有着十分重要的作用。 船舶、浮标等观测手段花费高昂，加上海洋面积巨大，可获得的现场海面风场数据十分有限，很难满足大面积海面风场的观测需求。日益发展的卫星遥感技术，为大面积观测风场提供了可能，微波散射计已经成为大面积获取全球海面风场的最重要遥感手段之一，不过微波散射计的空间分辨率通常为25-50km，难以满足对高分辨风场的需求 ...
毕上上
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Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs
Policy Studies Journal, EarlyView.ABSTRACT Democratic governance faces the intertwined imperatives of managing the transformative risks and opportunities of digitalization, particularly stemming from artificial intelligence (AI), while achieving environmental sustainability within planetary boundaries.
Martino Maggetti
wiley +1 more source
Leveraging an Unhappiness Lens for Smarter Policies
Policy Studies Journal, EarlyView.ABSTRACT Traditional policy research has largely focused on enhancing happiness or well‐being, privileging positive outcomes as the primary metric of success. We argue that a systematic focus on the drivers of unhappiness—rather than solely on happiness—offers a complementary analytical framework that can uncover hidden societal deficits and broaden ...
Marine Coupaud +2 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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Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT AI‐generated images have become so good in recent years that individuals often cannot distinguish them from ‘real’ images. This development, combined with the rapid spread of AI‐generated content online, creates a series of societal risks. Watermarking, a technique that involves embedding information within the content to indicate their AI ...
Bram Rijsbosch +2 more
wiley +1 more source
Preliminary study on assimilation of significant wave heights from T/P altimeter [PDF]
, 2017 2003-2004 > Academic research: refereed > Publication in refereed journalVersion of ...
Li, CW, Li, YS, Qi, Y, Shi, P, Zhang, Z
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Interventions to Reduce Child Poverty and Its Determinants: A Rapid Overview of Reviews
Poverty &Public Policy, Volume 18, Issue 2, June 2026.ABSTRACT Despite evidence for various child poverty reduction strategies, there is ambiguity regarding the most effective types to inform policy. Thus, we conducted an overview of reviews to systematically identify, appraise, and synthesize interventions for reducing childhood poverty in high‐income country settings.
Omar Dewidar +9 more
wiley +1 more source
Hobbyist preferences for pet freshwater turtles
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 more
wiley +1 more source
Wind Turbine Modeling and Control Study based on LPV Model [PDF]
, 2015 风能是一种清洁可再生能源，其开发和利用越来越受人们的重视。风力发电机是利用风能发电的设备，近年来，风力发电机逐渐向高效率、高可靠性和大型化发展，使风力发电机的动态模型变得更加复杂。为了使风力发电机平稳可靠运行，提高发电效益，对风力发电机进行建模和控制很有必要。本文针对风力发电机的动态非线性特性，基于LPV模型辨识方法对风力发电机建模，后用辨识所得LPV模型设计MPC控制器，对风力发电机进行变桨距控制。论文的主要工作有： （1）讨论风力发电机的原理模型，分别分析各分块原理模型和一些常用的计算机仿真工具。 （
曹力仁
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