Results 21 to 30 of about 15,596 (119)
Mitigating light pollution impacts on arthropods based on light‐emitting diode properties
Abstract Light pollution from artificial light at night (ALAN) is a significant environmental problem with far‐reaching consequences for ecological systems. Recent innovations in light‐emitting diode (LED) technology may offer sustainable outdoor lighting solutions, but scientific evidence is lacking. We investigated the effects of various LED lighting
Nicola van Koppenhagen +3 more
wiley +1 more source
ABSTRACT Sodium‐ion capacitors (SICs) offer high energy and power density with long cycle life, but developing kinetically compatible electrodes remains challenging. This work developed a simple and sustainable strategy to synthesize homologous carbon electrodes from the inner shells of durian husks (ISDH) for high‐performance SICs.
De‐Bing Yan +7 more
wiley +1 more source
使用ANSYS分析软件建立了薄壁型钢-混凝土梁柱组合节点在ISO-834火灾升温曲线下的有限元理论分析模型,对薄壁型钢-混凝土梁柱节点弯矩-时间曲线和节点耐火时间进行参数化分析。研究结果表明,荷载水平的大小对组合节点的耐火极限具有很大影响;然而当荷载水平保持不变时,防火保护层厚度则是另一个对梁柱组合节点的耐火极限有显著影响的重要因素,而其它参数如材料特性、构件几何尺寸等对梁柱组合节点耐火极限影响很小。
王传奇, 沈建华, 高轩能
doaj
方套方中空夹层钢管混凝土柱与钢-混凝土梁单边螺栓端板连接节点数值分析
为了揭示方套方中空夹层钢管混凝土柱与钢-混凝土组合梁单边螺栓端板连接的受力性能和破坏机理,通过ABAQUS有限元软件建立了该组合节点的数值分析模型,明确了材料本构关系模型和复杂接触问题。通过水平低周往复荷载试验验证了数值分析模型的准确性,对其破坏模式和滞回曲线进行了评价。考虑了几何参数、材料参数、荷载参数对节点水平荷载-水平位移曲线的影响,讨论了极限承载力和初始刚度的影响规律。研究表明,方套方中空夹层钢管混凝土柱与钢-混凝土组合梁单边螺栓端板连接节点具有良好的抗震性能和受力性能 ...
王静峰, 端梦珺, 郭磊, 张猛
doaj
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
Cette étude mobilise des méthodes mixtes pour examiner à travers un prisme intersectionnel l’influence des obstacles structurels du dernier kilomètre sur l’accès à la protection sociale des femmes membres de ménages qui élèvent du bétail dans les régions urbaines du Gujarat, Inde, durant et après la pandémie de COVID‐19.
Sanjana Rajasekar +2 more
wiley +1 more source
碟簧垫片具有良好的变形和弹性复位能力,通过预压碟簧垫片可实现结构或构件的震后复位。通过将碟簧垫片引入至方钢管混凝土柱-H形钢梁连接节点,实现了此类节点的自复位功能。采用通用有限元程序ANSYS建立了节点的精细化有限元模型,并对带有碟簧的方钢管混凝土柱-H形钢梁连接节点进行了参数分析,重点考虑了碟簧初始预应力、碟簧数量、碟簧组合方式对此类节点滞回性能、抗弯承载力、节点刚度、耗能能力及残余转角的影响,并和传统角钢节点进行了对比。分析结果表明:通过对碟簧的合理设计,可实现此类节点在震后恢复至初始状态 ...
王一心 +3 more
doaj
Advances in metals and metal hybrids‐based gas sensors and their applications
Graphical abstract Abstract As a kind of node on the Internet of Things, gas sensor is specifically utilized for detecting gaseous chemical species and humidity. Functioning as a kind of discrete electronic components, gas sensors have been extensively implemented in many fields, including agricultural production, public safety, healthcare activity ...
Danyao Qu +7 more
wiley +1 more source
Abstract As the coverage of area‐based conservation increases across the globe, it is critical to improve understanding of the social and ecological outcomes of such measures and the pathways to their outcomes. A social–ecological systems approach to monitoring and evaluation is increasingly advocated; yet, applications remain scarce.
Natalie C. Ban +21 more
wiley +1 more source
传统的设计和分析都将框架的梁柱节点处理成理想的刚接或铰接。然而,实际工程中的连接一般很难达到这两种理想状态,大部分连接的受力性能介于这两者之间,为半刚性连接。在组合框架中,组合楼板和纯钢梁柱端板连接节点组成了一种新的连接形式-半刚性组合连接。针对我国目前还没有关于平端板连接梁柱组合节点设计规定的现状,基于现有的研究成果,本文提出了平端板连接半刚性组合节点设计的方法和建议,可为我国相应规范的修订提供参考。
刘秀华, 巢沧海, 石文龙
doaj

