Results 31 to 40 of about 1,270,697 (149)
Gaoya dianqi, 2020 PRTV防污闪涂料能够有效改善高压电器绝缘材料的表面状态,提高电力系统表面憎水性。而在运行中的防污闪涂料受到紫外光、盐腐、热、凝露等作用,会出现耐污性能的下降。文中以PRTV防污闪涂料为研究对象,通过FTIR测试对比了防污闪涂料在紫外老化、盐腐老化、冷热冲击老化和水煮老化过程中分子结构变化,耐电痕性能影响。研究表明,0.46 mm厚防污闪涂料能够满足1A2.5级要求,接触角提高10%以上,老化试验条件促进了防污闪涂料的交联固化,冷热冲击老化试样的耐电痕性能影响最差。
杨成 +5 more
doaj
Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
International Journal of Applied Linguistics, Volume 35, Issue 4, Page 1938-1952, November 2025.ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛) +8 more
wiley +1 more source
Gaoya dianqi, 2022 复合绝缘子运行中异常发热现象频发，其中老化与表面污秽是导致发热的主要原因。文中采用有限元多物理场仿真，结合实测获得的材料参数，分别建立了正常运行、湿热老化、局部涂污及整体涂污等4种典型工况下的复合绝缘子仿真模型，根据湿热老化以及表面污秽的不同发热特征，分别建立静电、电流场两种模型。通过电场计算分析发现：湿热老化后复合绝缘子沿面电场增大、界面电场降低；局部涂污复合绝缘子在涂污处电场稍微下降；整体涂污复合绝缘子由于沿面电流增大造成电场畸变严重。通过以电介质损耗为接口的耦合热场以及电流场 ...
刘宇 +5 more
doaj
Journal of Ecology, Volume 113, Issue 7, Page 1746-1759, July 2025.In forests dominated by large clonal plants, such as giant moso bamboo, drought can alter the allocation of newly assimilated C within the tissues of source ramet but may not affect its allocation among interconnected ramets or within plant–soil systems.
Xiaogai Ge +9 more
wiley +1 more source
Gaoya dianqi, 2006 介绍了干式变压器绝缘树脂的老化理论及热老化实验原理。参考标准进行了绝缘树脂老化试验,并进行了实验数据处理及结果分析。通过实验得到了绝缘树脂的热老化性能参数,如温度指数等,验证了绝缘树脂耐热等级的可靠性。
柳再本
doaj
Integrative Conservation, Volume 4, Issue 1, Page 85-94, March 2025.Chromolaena odorata and Ageratina adenophora are invasive species in Southern Yunnan, China; they have very differing, yet overlapping, climate niches. Both invaders produce a large number of small pappus‐bearing achenes every year. They grow in, and their seeds are dispersed to, both suitable and marginal habitats.
Bin Wen +5 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 1, Page 20-32, March 2025.This study examined the impact of a 9‐day naturalist training camp at the Xishuangbanna Tropical Botanical Garden on participants' conservation attitudes and mental well‐being. Findings showed significant improvements in biodiversity knowledge, social connectedness, and naturalist identity, which contributed to increased environmental stewardship and ...
Yichuan Meng, Jiangbo Zhao, Jin Chen
wiley +1 more source
, 2016 热导率和热扩散率是天然气水合物资源开采关键性基础热物性数据,采用反应釜内壁衬有氟塑料材料,低过冷度,让水合物在反应釜内逐层生成的合成方法,获得可直接用于导热测试的二氧化碳水合物样品。采用瞬变平面热源法原位测试了温度264.68-282.04 K、压力1.5-3 MPa二氧化碳水合物热导率、热扩散率,并测试了二氧化碳水合物在268.05 K、0.6 MPa左右发生自保护效应过程中热导率、热扩散率,获得了晶态下和自保护效应过程中的二氧化碳水合物热导率、热扩散率变化特性 ...
关进安 +3 more
core +4 more sources
Gongye shui chuli, 2018 老化油是含杂质高且十分稳定的乳化液体系，渤海区域个别油田存在的老化油累积问题亟待解决。对比了热化学破乳工艺、高频电脱破乳工艺以及离心分离破乳工艺处理老化油的效果。热化学破乳及电脱破乳对老化油的处理效果不佳，弊端明显。使用离心分离设备处理老化油，设备简单，现场处理效果理想，运行稳定，在现场取得了良好的应用效果。
杨秘 +4 more
doaj +2 more sources