Results 11 to 20 of about 567,919 (159)
Jianzhu Gangjiegou Jinzhan, 2022 为了研究腹板开椭圆孔耗能支撑的滞回性能，进行了3个支撑试件的低周往复加载试验，研究支撑长细比和耗能腹板长度对这种支撑耗能能力和滞回性能的影响，得到试件的滞回曲线、骨架曲线、刚度退化曲线、延性系数、等效黏滞阻尼比等。试验结果表明：在低周往复荷载作用下，腹板开椭圆孔耗能支撑依靠腹板开孔板件进入塑性耗散能量。耗能支撑滞回曲线饱满，耗能能力强，初始刚度较高。孔间板件断裂破坏导致耗能支撑试件失效，试件呈现延性破坏。试验过程中，中部工字钢保持弹性状态，没有进入塑性。相同长细比下耗能腹板的长度越长 ...
沈婷悦, 赵宝成
doaj
Inferring alternative ecosystem states with field survey data
Methods in Ecology and Evolution, EarlyView.Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen +10 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 地震作用下，减小耗能段的残余变形和优化自复位结构的耗能机制，是提高建筑结构震后功能恢复能力与抗震性能的重要方式之一。基于预应力钢绞线、滑移连接和短剪切形耗能段的力学性能，提出一种抗震性能良好的组合体。为探究组合体的抗震性能，采用校正的有限元分析方法对5个有限元模型进行分析，得到了组合体分析模型的滞回性能、自复位性能、耗能能力和等效塑性应变等抗震指标。有限元分析结果表明：组合体具有良好的承载力、耗能能力和自复位性能；组合体分析模型的损伤集中在可更换的耗能段上 ...
熊墨强 +3 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The surging demand for high‐performance NdFeB magnets has made it essential to achieve ultrahigh coercivity while minimizing the consumption of heavy rare earths. To tackle this challenge, this study proposes a Dy/Tb bilayer grain boundary diffusion strategy and systematically investigates the co‐diffusion behavior of Dy and Tb.
Rui Chang +7 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 基于削弱耗能梁截面尺寸的原理，提出了一种新型带弯剪屈服耗能梁段的K形偏心支撑钢框架结构。为验证其抗震性能，完成了1个1∶2.6缩尺的单层、单榀、单跨模型的拟静力试验。结果表明，试验模型的塑性变形基本局限在耗能梁段上，且主要通过耗能梁端部上、下翼缘和中部的腹板耗散能量，试件表现出较好的耗能能力和延性。为进一步研究其抗震性能，在试验模型的基础上改变了中部剪切型耗能梁（简写为SL）的长度lm，采用ABAQUS有限元软件建立了8个数值模型并对之进行了滞回性能分析，分析了滞回曲线、承载力、刚度及耗能能力等随lm ...
陈世玺 +5 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Electromagnetic wave absorption materials require high dielectric loss and excellent impedance matching performance. However, current conventional biomass‐derived electromagnetic wave absorption materials are still limited by low electrical conductivity and a single structure.
Yue Zhang +9 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2020 地震作用下,传统钢框筒结构难以实现强柱弱梁的设计理念,大震下柱端往往先于梁端出现塑性铰。针对这一问题提出了含可更换剪切型耗能梁段的钢框筒结构,即在裙梁中设置可更换的剪切型耗能梁段,大震作用下结构利用剪切型耗能梁段良好的弹塑性变形能力进行耗能,其余构件仍处于弹性状态或部分发展塑性。设计了一组算例结构,包括传统钢框筒结构和含可更换剪切型耗能梁段的钢框筒结构,采用SAP2000有限元分析软件对算例结构进行了弹性和弹塑性地震反应分析 ...
程倩倩, 连鸣, 苏明周, 张浩
doaj
Gongye shui chuli, 2022 造纸工业是一个高能耗、高水耗、高污染的行业。在当前国家能源紧缺、造纸业市场竞争激烈的局势下，降低能源费用支出、提升市场竞争力，关系到每个造纸厂的生存与发展。由于处理水量大、废水需氧量高等原因，造纸厂污水处理的能耗费用在工业废水处理中居于前列。选取造纸行业内有代表性的污水处理厂，通过分析污水特点及工艺流程，并进一步分析能耗结构，寻找污水处理厂节能降耗的方法。经过分析，电耗占污水处理总能耗的60%~90%，好氧处理工序的能耗在所有工序中最高，各工序的主要耗能设备是泵与风机。从工艺设计、设备配置、工艺运行 ...
康志辉
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Cross‐scale assembly of metal (sub) nanoparticles and/or single atoms into millimeter/nanostructured metal monolithic catalysts (Min‐SMCs) is highly appealing for sustainable water cleanup, due to energy‐efficient catalyst recyclability, high infrastructure compatibility, and low metal‐releasing risks.
Jia‐Cheng E. Yang +4 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song +4 more
wiley +1 more source