Results 41 to 50 of about 104,408 (159)
Gaoya dianqi, 2023 环氧树脂在直流电场下易于积聚电荷造成局部电场畸变，进而诱发沿面闪络。文中建立了考虑离子产生、复合、迁移和扩散过程的电荷积聚模型，并在模型中计及了电导率的温度特性。研究了不同温度下气固界面电势、电场、电荷的分布及功率损耗变化，分析了温度对电荷行为和电场畸变率的影响。结果表明：表面电荷密度随温度升高而增大，三结合点处电荷密度最大；温度对切向电场的影响更大，随温度升高，电荷积聚的主要方式由表面传导向体传导转变；适当升温可以提高表面电荷积聚和消散速率，但高温会使表面电荷密度和泄漏电流增大，进而加剧畸变和损耗 ...
谢子豪 +5 more
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Cross‐Border Online Radicalization Among Teenagers: Evidence From a Brazilian Case Study
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT This article examines the theme of transnationality in online radicalization processes through an empirical case. It focuses on a group called ‘The Kiss’, led by a Portuguese teenager (Micazz) who encouraged individuals to carry out acts of violence in Brazil in 2023.
Quésia Pereira Cabral +1 more
wiley +1 more source
, 2017 黄土高原聚湫/淤地坝内的沉积物是黄土再侵蚀搬运的直接结果,以高堆积速率和多沉积旋回为特征,是认识黄土高原地球关键带过程和历史的理想载体之一。如何鉴定并有效划分沉积旋回是利用聚湫/淤地坝沉积序列恢复流域土壤侵蚀和地表环境过程的基础。本文选取地处黄土高原中部丘陵沟壑区(陕西靖边)和高塬沟壑区(甘肃合水)的两个聚湫为代表,利用高分辨率XRF岩芯扫描仪获取两个聚湫上部近代沉积序列的元素分布,提出划分沉积旋回的地球化学指标,并识别年际冻融层,获得旋回产沙模数及年际产沙量 ...
张信宝[4] +4 more
core +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT With high theoretical capacity and low cost, bismuth sulfide (Bi2S3) demonstrates considerable potential as an anode for sodium/potassium‐ion batteries (SIBs/PIBs). Unfortunately, significant volume variation, low electrical conductivity, and dissolution of polysulfides drastically weaken their intrinsic merits.
Fuyu Xiao +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2018 为探讨紫色土区植物篱篱前淤积带土壤团聚体的稳定性，试验以该淤积带土壤为研究对象，设置了10°对照小区（T1）、10°新银合欢植物篱小区（T2）、10°香根草植物篱小区（T3）、15°对照小区（T4）、15°香根草植物篱小区（T5）等5个处理，采用萨维诺夫法测定了风干团聚体和水稳性团聚体的组成状况，以保存机率、稳定性指数、PAD（结构体破坏率）、MWD（平均重量直径）、GMD（几何平均直径）、MWSSA（平均重量比表面积）、CS（偏度系数）和CE（峰凸系数）等为评价指标，分析了不同坡度 ...
王润泽 +8 more
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Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 more
wiley +1 more source
Ecology and Evolution, Volume 16, Issue 5, May 2026.This study reveals a shift in woody plant community assembly from competitive exclusion in early succession to habitat filtering in later stages within karst areas. Environmental distance (80.54%) contributed significantly more than geographical distance (9.95%), providing strong quantitative evidence that niche processes, particularly habitat ...
Hongfen Hu +5 more
wiley +1 more source
Lithium Deposition Behavior of Reconstituted Two‐Dimensional Zeolite Y Separators
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT During the operation of lithium‐ion batteries, uncontrollable lithium dendrite growth often occurs, resulting in internal short circuits and a significant reduction in cycle life, which poses a major obstacle to their practical application.
Yingying Deng +9 more
wiley +1 more source
SF6直流装置中支撑绝缘子冲击闪络特性的研究——静电积聚的影响
Gaoya dianqi, 1984 本文着重介绍用于SF6直流装置中的支撑绝缘予冲击闪络特性的影响因素和由先期施加直流高压形成的电荷积聚对支撑绝缘子冲击闪络水平的影响。试验表明,静电积聚对支撑绝缘子冲击闪络水平的影响有极性效应,即与直流同极性的冲击闪络水平变化不大,而与直流异极性的冲击闪络水平有所下降。下降程度与直流电压大小,持续时间等有关。这种极性效应可用表面电荷积聚的影响来解释。试验逐表明,具有波纹状表面的支撑绝焯子由于闪络路径与电荷积聚的部位不同因此受影响很小。
余存仪
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Shuitu Baochi Xuebao, 2022 为探究高寒湿地地下水咸化对土壤团聚体稳定性和有机碳库的影响, 以巴音布鲁克高寒湿地季节性地表积水区和常年干燥区土壤为研究对象, 设对照、微咸水、咸水和盐水4个矿化度, 地下水NaCl含量分别为0, 2, 6, 23 g/L, 使用湿筛的方法将土壤团聚体分成不同的粒径。结果表明: 地下水矿化度升高对0—10 cm土壤团聚体分布影响不大, 对10—30 cm土壤团聚体有显著影响。在10—30 cm土层中, ＞2 mm土壤团聚体质量百分比随着矿化度升高先降低再升高, 在2 g/L处理下降至最低1%~14 ...
愚广灵 +5 more
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