Results 51 to 60 of about 591,740 (176)
Structural Modulation of Magnetic Softness in Fe‐Based Amorphous Alloys via Pulse Current Training
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Fe‐based amorphous alloys, despite their intrinsically low magnetocrystalline anisotropy, suffer from quasi‐dislocation dipoles and localized stress fields that impede domain‐wall motion and increase coercivity. Here, we introduce pulse current training (PCT) as an energy‐efficient technique to overcome these limitations in a Fe76Si9B10P5 ...
Shumin Ye +13 more
wiley +1 more source
Individual Uncertainty and Policy Compliance During the COVID‐19 Pandemic
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 2, June 2026.ABSTRACT Ample scholarship examines the extent to which public policies in representative democracies reflect the priorities and needs of the public, often finding that individuals are unaware of many policy issues and policy responses. This may be especially true when issues of risk and scientific uncertainty are involved, which can be difficult for ...
Nathan Jeschke +6 more
wiley +1 more source
, 1998 一、引言煤炭占我国一次能源总产量的７０％以上，由于燃煤的工业锅炉热效率低，加剧了环境污染。据统计，９６％的能源燃烧排放的污染物来自燃煤。ＮＯｘ的８７％、ＳＯ２的９３％、烟尘的９９％、ＣＯ的９７％都是直接由燃煤形成的。还有大量的油烟、煤烟、苯、酚、酸、..
李文光
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Jianzhu Gangjiegou Jinzhan, 2021 为了研究部分包裹混凝土组合(PEC)柱(弱轴)与型钢梁对穿高强螺栓端板连接节点的抗震性能,考虑端板厚度、盖板厚度以及节点构造形式3个参数,设计了两种不同构造的梁柱节点,对其进行低周往复荷载试验和有限元模拟,分析了各设计参数对试验节点滞回性能、承载能力、节点刚度、延性和耗能能力等指标的影响。研究结果表明:盖板厚度由14mm增加至16mm时,节点承载力提高了33.91%,初始刚度提高了14.9%,延性降低了18.9%;端板厚度由12mm增加至14mm时,节点承载力提高了19.93%,初始刚度提高了15.1%,
赵根田 +5 more
doaj
Functional Ecology, Volume 40, Issue 6, Page 1725-1739, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Root exudates play a key role as signals and nutrients in mediating plant–microbe communication. However, critical knowledge gaps remain regarding how root exudates mediate soil–microbe–plant interactions to regulate crop yield under long‐term straw mulching combined ...
Jiajie Song +7 more
wiley +1 more source
, 2002 介绍了冰蓄冷系统的两种基本系统形式：串联和并联系统，并介绍了3种节能设计方法：串联泵、变频和冷机旁通。通过对某工程实例的模拟计算，对比分析了这10种系统设计方案的节能效果。结果表明，与普通单泵的串联系统相比，采用串联泵的串联系统有很好的节能效果；采用冷机旁通阀的方案尽管节能较小，但仅仅增加了一条带等压平衡阀的支路，投资很小，是一种经济实用的节能方法；采用变频泵可大大降低泵的能耗，尤其是在不同工况和冷负荷情况下流量改变较大的泵上采用变频技术 ...
许功铎, 徐健
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, 2013 节能服务公司自身面临着项目开发周期长、短期获利能力差、负债率高、项目融资困难等压力,也认为客户能否真正按合同分享节能效益是一个很大的风险,普遍感到做业务很辛苦我国“十二五“能源规划提出,到2015年全国能源消费总量将控制在40亿吨标准煤左右。一般而言,能源总量控制需要通过节能和改变产业结构来实现,改变产业结构三年中见效应该很难 ...
林伯强
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Jianzhu Gangjiegou Jinzhan, 2014 介绍了一种在梁腹板及下翼缘开孔,并在翼缘开孔处安装摩擦阻尼器的新型节点。利用有限元软件ANSYS分析了铝合金滑动板与梁下翼缘之间的摩擦系数、开孔宽度、开孔距柱翼缘距离和开孔高度等参数变化对新型节点抗震性能的影响,并对各系列新型节点试件与传统节点试件的抗震性能进行了分析比较。分析结果表明:各系列新型节点试件与传统节点试件的滞回曲线都比较饱满,表现出了较好的滞回性能。但各系列新型节点试件的延性及耗能能力要远远优于传统节点试件,且各系列新型节点试件都能够迫使塑性铰远离节点区,而出现在开孔处 ...
毛剑, 郑宏
doaj
Functional Ecology, Volume 40, Issue 6, Page 1878-1891, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
wiley +1 more source
, 2016 本发明公开了一种具有自调节能力的组合式吸能装置，所示装置包括上下两个垫板与中间的多个单元吸能筒，其具有4个同样的单元吸能结构，所述单元吸能结构在沿着薄壁圆筒长度L方向，布置不同深度h0到h0‑nt的环形凹槽，凹槽的间距为W，其中，凹槽处壁厚较薄，沿圆筒长度L方向凹槽的深度不同。本发明公开的吸能装置不但能够实现非对称碰撞下进行碰撞角度回调，而且能够有效保证吸能机构的稳定性，控制非对称变形引起的吸能能力降低幅度，从而可以在正碰撞与斜碰撞情况下 ...
杨喆, 黄晨光, 魏延鹏, 吴先前
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