Results 31 to 40 of about 1,243,859 (150)
Evolution of research on global amphibian declines
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract In the late 1980s, the scientific community became aware of severe, enigmatic amphibian population declines. These declines triggered a wave of research focused on quantifying their extent and identifying key drivers. We used text‐analysis techniques, including topic modeling and geoparsing, to examine the evolution of research focused on ...
Jordann Crawford‐Ash +6 more
wiley +1 more source
, 2010 這篇文章描述擴散火焰之光學Rayleigh 散射溫度測量法。首先對此光學溫度量測之原理 ,設備以及測量步驟加以說明。根據原理,有效 應用此測量法之最簡單方法是使用特殊的燃料 及助燃劑。實驗結果證明,以此方法所得到之 火焰溫度及分布是非常合理的。 This paper describes an optical Rayleigh scattering temperature measurement in diffusion flames.
Chen, Tseng-Yuan +2 more
core +1 more source
, 2017 本发明涉及航天器地面热试验领域，公开了一种航天器热真空试验温度控制方法。该方法包括步骤：使用两个测量范围不同的测温仪，同时对激光加热中心位置进行测量，分别获得两个测量范围的平均温度T1、T2；将两个平均温度的比值T1/T2作为PID控制器中比例和积分时间系数的整定参数，根据T1/T2的变化对比例和积分时间系数进行实时在线整定，利用整定过的系数通过PID控制获得当前加热功率的变化值；根据所述变化值调整加激光的输出功率。本发明在使被控温度的超调量大大减小的条件下，使被控温度的调整时间不增加 ...
甘政涛 +5 more
core +2 more sources
New Directions for Child and Adolescent Development, Volume 2026, Issue 1, 2026.Background Working memory updating is crucial in bilingual children′s second language (L2) reading comprehension. A robust updating ability is a cognitive key for children to successfully master L2 reading comprehension. Objective This study is aimed at investigating the effect of updating ability on the L2 Chinese reading comprehension among Uyghur ...
Guangxin Li +3 more
wiley +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
, 1996 建立了纯金属真空蒸馏过程数学模型。模型包括挥发过程、气相传质过程、冷凝过程和传热过程。应用迭代法对数学模型求解，可得出纯金属在不同实验温度 ...
刘日新, 李本文, 吴铧, 戴永年
core
Global Change Biology, Volume 31, Issue 11, November 2025.This study assessed the potential impacts of climate and land‐use change on soil fungal diversity across four North American biomes. We found that climate change typically caused both diversity losses and gains, particularly in coniferous forests and among arbuscular mycorrhizal fungi, whereas land‐use change mainly reduced diversity, especially in ...
Wenqi Luo +5 more
wiley +1 more source
, 2006 单重态氧发生器是化学氧碘激光器真空条件下使用的核心部件，为减轻自重，采用碳纤维复合材料取代不锈钢制作单重态氧发生器。本文采用有限元分析方法，探索采用树脂复合材料制作真空罐体和封头的设计方法和优化方案。研究表明，其强度和真空性能均达到设计要求 ...
葛增杰 +8 more
core
Gaoya dianqi, 2017 基于灰色关联度和TOPSIS法对真空断路器运行状态进行综合评估,根据真空断路器典型故障类型,构建由振动信号、真空度、电寿命、触头温度组成的评估指标体系,采用熵权法确定各项指标权重系数。通过样本与正理想解和负理想解的欧氏距离和灰色关联度描述样本与理想方案的贴近程度,综合灰色关联度和欧氏距离计算评估样本的相对贴近度,并据此对评估样本进行优劣排序。实例论证及与其他方法对比表明,该方法可以客观有效地评估真空断路器运行状态,为合理安排真空断路器检修计划以及指导真空断路器设备维修提供可靠参考。
李济沅 +4 more
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