Results 21 to 30 of about 4,009 (146)
Rare Metals, Volume 45, Issue 1, January 2026.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
Numerical simulation of plant root system stress response to coal mining disturbances in semiarid mining areas [PDF]
Root damage is a critical ecological issue affecting vegetation in semi-arid underground coal mining areas. The mechanisms and influencing factors of root stress damage induced by stress changes in the root-soil layer due to mining-induced rock mass ...
Chuangang GONG +8 more
core +1 more source
Latin American Policy, Volume 16, Issue 4, December 2025.ABSTRACT In recent years, video assistant referee systems have been increasingly used to correct unfair decisions in sports. Similarly, I argue that constitutional referendums play a corrective role in hybrid or competitive authoritarian regimes, where the electoral referee is biased and the government enjoys unfair advantages.
Muhammet Derviş Mete
wiley +1 more source
Shuitu Baochi Xuebao, 2017 以鄂尔多斯采煤塌陷区植物的优势种之一黑沙蒿为研究对象，采用伺服式强力机研究其直根的材料力学特性。结果表明：在1～5 mm径级范围内抗拉力、抗折力与根径均呈幂函数正相关，抗拉强度、抗折强度与根径呈幂函数负相关。在拉力和折力分别作用下，直根均表现出弹塑性变形特征，抗拉极限弹性力大于抗折极限弹性力，轴向弹性变形小于径向弹性变形。直根承受径向折力的σ～ε（应力—应变）曲线基本为下凹型，承受轴向拉力时的σ～ε曲线基本为上凸型，对于两种受力形式，极限强度均随根径的增大而减小，极限应变与根径无相关性。1～5 ...
李雪松, 刘, 王, 刘嘉伟, 张, 李
doaj
Rare Metals, Volume 44, Issue 3, Page 1833-1843, March 2025.Graphical abstract AbstractThe pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti3C2Tx MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure.
Zhao‐Yang Li +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2016 在植物生长旺盛期，采用材料试验机测定3～4 a生柠条、沙柳、沙棘、白沙蒿在1～4 mm径级范围内的侧根分支处、相邻上级直根的抗拉力与抗折力，研究4种植物根系易受损的外力类型。结果表明：同径级条件下，柠条和沙柳的侧根分支处、相邻直根均表现为抗拉力小于抗折力，而沙棘和白沙蒿侧根分支处和相邻直根均表现为抗拉力大于抗折力。侧根分支处抗拉强度和抗折强度分别为：柠条(23.70±3.97)＜（33.66±7.74) MPa，沙柳(14.86±1.28)＜（17.31±1.91) MPa，沙棘(10.61±2.40)＞
李有芳 +7 more
doaj
, 2009 目的:用三维光弹实验方法研究跟骨的生物力学,并分析其骨折的发生机制。方法:解剖成年男子左侧带足小腿,进行理论力学分析。制作环氧树脂跟骨模型及应力冻结,切片后置光弹观测,分析结果。结果:跟骨在踝关节背屈15°位时,应力值较中立位明显的增加。跟骨在踝关节背屈15°位与中立位比较,应力明显向前向上方向集中。在跟骰关节、跟骨丘部、Gissane角周围、后距下关节、跟骨结节内侧触地部等区域,出现高应力集中区。结论::①人由相同高处坠落,跟骨着地,踝关节背屈15°位较中立位易产生跟骨骨折。②踝关节背屈15°位着地 ...
廖铦, 张建新
core
, 2015 针对带传动过程中,带容易发生疲劳失效及断裂等问题,以带传动系统中的多楔带为研究对象,通过实验获得多楔带橡胶的物理特性,并将实验得到的材料特性代入有限元分析软件ABAQUS中,对多楔带疲劳特性进行仿真分析。分析结果表明,随着加载载荷的增加,多楔带单位长度抗拉力不断增大而循环次数则不断减小,随着初始裂纹尺寸的增加,多楔带单位长度抗拉力也不断增大且增加率却不断减小,而循环次数呈现先缓慢减小后急剧减小的趋势;随着位移的增加,多楔带单位长度抗拉力不断增大 ...
李国俊
core +1 more source
World Medical &Health Policy, Volume 16, Issue 4, Page 692-708, December 2024.Abstract The Middle East region has a long history of resistance, activism, and advocacy movements in health, most recently as part of the 2011 region‐wide Arab Spring. Despite this storied history, however, movements of resistance, activism, and advocacy in health in the region are rarely unpacked, examined, or documented.
Mohammed Alkhaldi +3 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2018 利用有限元软件ABAQUS对钢板组合剪力墙-钢梁外肋板节点进行静力拉伸数值模拟,以外肋板截面高厚比、外伸梁段长度和剪力墙外包钢板翼缘的宽厚比为参数,对节点外肋板的加强作用和初始抗拉刚度、抗拉承载力和应力分布进行了分析和理论研究,并单独考虑在剪力墙外包钢板翼缘的应力影响区设置栓钉,通过改变栓钉的间距和数量来研究对抗拉承载力的影响。结果表明:节点通过外肋板对外伸梁段翼缘的加强作用,使得水平荷载大部分传到外肋板,外包钢板翼缘弹塑性变形得到控制;改变参数对抗拉承载力、初始抗拉刚度的影响很小 ...
万馨, 白尧尧, 李相勇
doaj