Results 21 to 30 of about 4,101 (143)
Gaoya dianqi, 2018 文中提出了一种基于改进支持向量机的变压器实时热点温度预测方法。该方法以变压器负载电流、环境温度和顶层油温为特征值,将变压器热点温度预警与预测相结合,目的在于实现基于近期历史运行数据的变压器实时热点温度预测。文中研究分析了基于改进网格搜索、遗传算法及粒子群算法的支持向量机在变压器短期热点温度预测中的应用效果,结果表明,3种改进方法均可有效提升预测精度,但基于改进网格搜索算法的支持向量机预测效率最高。最后,以某35 k V油浸式变压器实时热点温度数据为样本集,文中所述方法可有效实现变压器短期热点温度预警预测,
廖才波 +5 more
doaj
Integrative Conservation, Volume 4, Issue 4, Page 555-568, December 2025.Brief summary: Sri Lanka's biodiversity is threatened by habitat loss, climate change, and ineffective traditional conservation methods. Integrating plant tissue culture and DNA barcoding offers scalable, precise tools for conserving rare and endemic species.
Mylange Dona Kasundi Mekhala Gunasena +2 more
wiley +1 more source
Study on the Thermal Conductivity of Graphene Suspensions [PDF]
, 2015 石墨烯具有极高导热性能,近年来被提倡用于散热等用途。在散热片中嵌入石墨烯或数层石墨烯(flg)可使得其局部热点温度大幅下降。故需要对其导热性能进行深入研究。文章采用瞬态热丝法对石墨烯的导热性能进行研究。通过多次实验测得的数据分析加入石墨烯后纳米流体导热性能的变化。分析了不同温度下石墨烯悬浊液导热性能的差异,不同浓度下石墨烯悬浊液导热性能的差异。研究发现石墨烯能够有效提高液体的导热性能。这为石墨烯作为散热等方面应用提供了良好的理论基础。Graphene has high thermal ...
张巍伟
core
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, 2021 变压器温度流体场三维仿真是准确计算变压器绕组热点温度的重要方法,然而变压器绕组结构复杂,精确三维建模和网格剖分困难,计算效率低,难以满足实际工程需求。文中针对变压器温度流体场计算过程中绕组结构类型以及撑条、垫块、外包绝缘纸对绕组热点温度的影响进行了讨论,在一定的容许偏差内对绕组结构进行简化分析,得到以下结论:网格控制方法及剖分精度对计算结果有较大影响,采用扫描剖分方法能够在绕组附近区域获得高质量的六面体网格,具有较高剖分效率;对温度、流速等变化较快的区域进行局部加密 ...
晋涛 +7 more
doaj
New Phytologist, Volume 247, Issue 6, Page 2616-2629, September 2025.Summary Seagrasses are important contributors to environmental nutrient cycling in marine ecosystems and can improve water quality by absorbing excess nitrogen (N). However, these ecosystems are vulnerable to human‐mediated pressures, including marine heatwaves (MHWs), particularly those of longer duration. We performed an experiment simulating a 30‐d,
Alissa V. Bass +5 more
wiley +1 more source
Gaoya dianqi, 2017 为了研究红外成像技术在GIS内局部过热故障诊断的有效性和可行性,文中通过静态试验方法,搭建了GIS内局部过热故障仿真平台,研究了故障点不同温度下外壳不同位置的稳定温升,并得到了GIS内部过热点温度及与其对应外壳温升间的函数关系。利用红外成像仪可清晰观察到外壳的局部高温,验证了试验的有效性和可行性。研究表明:当GIS内部发生过热故障时,在与其对应的外壳顶部将产生局部高温。以此高温点为中心,沿GIS轴线方向温度向两侧递减,呈开口向下的抛物线形。距最高温度点0.6 m处,温度变化大约为1115℃。超过0.6 ...
李爽 +6 more
doaj
Development Status and Plan of Metal Fuel of Integrated Fast Reactor [PDF]
Metal fuel has high breeding ratio, simple post-processing procedures, good safety, convenient disposal of long-lived actinides, and can be integrated into integrated fast reactor nuclear power plant, making it be an ideal choice for the fuel of fast ...
FENG Wei, LIU Yizhe, REN Yuanyuan, YANG Yong, ZHOU Peide
core +1 more source
Integrative Conservation, Volume 4, Issue 1, Page 95-106, March 2025.Climate change is widely recognized as a major threat to biodiversity and a critical factor contributing to the decline of species and populations. The study investigates the differential impacts of climate change on endangered continental and island specie.
Ling Hu +9 more
wiley +1 more source