Results 31 to 40 of about 10,026 (174)
The Research on Wind-induced Vibration Control of Large Span Roof Structures with Different Damping Systems and Optimization of MTMD Damping System [PDF]
, 2016 近年来，随着国内经济实力的增强和社会发展的需要，大跨空间结构在我国得到迅速发展，且跨度越来越大。由于大跨空间结构具有质量轻、阻尼小、柔性大、自振频率低等特点，因而对风荷载的作用很敏感。在风荷载的作用下，结构会产生较大的变形，严重降低结构的安全性和舒适性。为抑制结构的动力响应，学者们提出在结构适当位置处安装控制装置的概念。目前，高层建筑在风荷载作用下的振动控制研究已取得丰硕成果，并有大量的工程应用实例。然而，国内外学者对大跨空间结构的风振控制研究相对较少，因此有必要开展大跨空间结构的风振控制研究 ...
邵辉
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International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source
Shuitu Baochi Xuebao, 2020 土壤结皮在干旱半干旱地区广泛分布，是影响风蚀的重要因素。以准噶尔盆地东部矿区周边表层土壤为对象，通过控制土壤结皮率和结皮分布，利用风洞试验结合土壤风蚀传感器，对不同土壤结皮和风速条件下土壤风蚀量、风沙流结构、土壤颗粒释放的变化特征进行研究。结果表明：（1）风蚀量随风速增加显著上升，随土壤结皮率增加显著下降。均匀分布的结皮风蚀量整体低于集中分布的结皮；（2）跃移高度随风速增加而增加，高度在0~3 cm的收集物占总收集量的80%左右。14 m/s的风速能够使土壤发生跃移，而土壤结皮率达到50 ...
毛旭芮 +4 more
doaj
Risk, Hazards &Crisis in Public Policy, Volume 16, Issue 4, December 2025.ABSTRACT Background Hazardous levels of contaminants produced by anthropogenic activities are increasingly pervading residential environs and urban areas. Hazardous contamination can pose significant health risks for citizens dwelling in exposure pathways.
Rosina Johnson +3 more
wiley +1 more source
Gaoya dianqi, 2010 风力发电对发电系统可靠性具有一定贡献,正确地估算包含风电场的发电系统可靠性有助于更好地规划电源结构。传统的单一风速模型忽略了风速与负荷之间的相关性,会给计算结果带来较大的误差。本文提出了风速的分时段估计模型,即按照风速的时间特性分别估计各个时段风速模型的参数,给出了基于此模型的包含风电场的发电系统可靠性计算的一般方法,并分析了单一风速模型与分时段风速模型之间计算结果差异产生的原因,以及风速与负荷之间的相关性对可靠性计算结果的影响。最后通过一个具体的算例说明了分析的正确性。
华文, 徐政
doaj
Olhar para o outro tal e qual como ele é, é respeitá-lo na sua integridade
, 2023 Num mundo em constante evolução onde todos temos a capacidade de aprender, a Escola deve ser um lugar seguro para todos. A presente investigação decorreu no âmbito da Prática de Ensino Supervisionada integrada no Mestrado em Educação Pré-Escolar e Ensino no 1º Ciclo do Ensino Básico, tendo como objetivo principal educar para a diversidade presente ...
openaire +1 more source
Optimum sizing of PV/Wind hybrid system (I) CAD method [PDF]
, 2017 2003-2004 > Academic research: refereed > Publication in refereed journalVersion of ...
Ai, B, Liao, X, Shen, H, Yang, HX
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, 2020 Plant phenomics is under rapid development in recent years, a research field that is progressing towards integration, scalability, multi-perceptivity and high-throughput analysis.
Guohui, Ding +6 more
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Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Identifying refugia from emerging threats is vital to ensure the persistence of rare and threatened species, but modeling habitat distribution for these species is challenging and the role of people in refuge management is rarely considered. Myrtle rust is an emerging infectious disease that represents a grave threat to the rare wetland tree ...
Sarah M. Herbert +7 more
wiley +1 more source
Triboelectric Nanogenerator Structure Designs and Mechanical Energy Harvesting Applications [PDF]
, 2014 随着环境污染、能源危机等社会问题的加剧，发展新型、高效且能够直接从环境中收集能量的新能源技术成为当今科学技术发展的一个重要课题。在各式各样的能量来源中，机械能由于其广泛存在于日常生活环境中，已经成为最受人们关注的能源之一。基于上述背景，纳米发电机——一种利用纳米材料和纳米结构收集机械能并转化成电能的新技术——于2006年被美国佐治亚理工学院王中林院士课题组首次提出，并快速发展成为一种高效且具有广泛实际应用前景的新能源技术。近年来，随着纳米发电机技术的发展，该领域的一个重要分支 ...
谢燕楠
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