Results 31 to 40 of about 1,133,635 (178)

基于三参数Burr分布的悬式瓷绝缘子零值温差分布特性研究

open access: yesDianci bileiqi, 2020
提出一种基于三参数Burr分布的估计方法来描述零值悬瓷绝缘子的温度分布特性。为验证这一方法,以某省电网运行10年及以上变电站悬式绝缘子红外测零项目的红外测温数据为研究对象,通过统计分析建立了三参数Burr分布数学模型。由于该分布函数的参数在极大似然估计法下没有显式解,故采用牛顿法对其求解,可得到三参数Burr分布对绝缘子零值温差分布的拟合曲线;然后,在MATLAB中利用Kolmogorov-Smirnov方法对于该分布模型进行了参数检验。检验结果表明 ...
徐华   +8 more
doaj  

Taxonomic and functional diversity of urban bees of the world

open access: yesConservation Biology, EarlyView.
Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso   +10 more
wiley   +1 more source

Emerging applications of large language models in ecology and conservation science

open access: yesConservation Biology, EarlyView.
Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides   +5 more
wiley   +1 more source

Scientists’ warning on the global destruction of rock outcrop ecosystems

open access: yesConservation Biology, EarlyView.
Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula   +19 more
wiley   +1 more source

Reflexiones sobre la traducción de 姐姐 /jiejie/ (“hermana mayor”) y 妹妹 /meimei/ (“hermana menor”) en Sueño de las mansiones rojas

open access: yesOnomázein
Although 姐姐 /jiejie/ (“elder sister”) and 妹妹 /meimei/ (“younger sister”) are basic relatives' terms of the nuclear and consanguinity kinship, they mean a big challenge when they are translated into Spanish because of the linguistic and cultural differences and defaults between the Chinese and the Spanish.
openaire   +1 more source

Integrating fossil data in ecological niche models to improve predictions of future habitat of Caribbean corals

open access: yesConservation Biology, EarlyView.
Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams   +3 more
wiley   +1 more source

Modeling seed germination data to meet biodiversity conservation needs in the Mediterranean

open access: yesConservation Biology, EarlyView.
Workflow to assess the availability and quality of germination data and assign species' thermal risk in the Mediterranean. (a) Assessment of data availability, including the phylogenetic distribution of the number of records (i.e. available germination data); (b) data quality assessment; and (c) assignment of climate risk categories for species that ...
Diana María Cruz‐Tejada   +2 more
wiley   +1 more source

能级统计与金属小粒子电子比热的研究

open access: yes四川大学学报. 自然科学版, 2003
利用随机矩阵理论,在能级间距分别为等能级分布、泊松分布、正交系综分布、幺正系综分布及辛系综分布的情况下,对含电子数为奇数和偶数的金属小粒子的电子比热进行了理论计算;并对其高低温特点作了讨论.
杨晓莉, 程南璞
doaj  

Improving efficiency in conservation planning by modeling species‐specific responses to threat abatement

open access: yesConservation Biology, EarlyView.
Abstract Reversing ongoing biodiversity loss requires effectively managing anthropogenic threats. Although conservation actions can mitigate these threats, prioritizing and targeting such actions remain challenging because species respond differently depending on the nature of the threats and their biological traits.
Camila Guerrero‐Pineda   +3 more
wiley   +1 more source

泥石流反粒径分布的一种定性解释

open access: yes, 1999
假设泥石流中的粗颗粒(如石块等)以跳跃的方式前进,通过分析单个颗粒在定常充分发展的流场中的运动,给出了单一起跳速度下以及具有一定分布的起跳速度下,颗粒数密度随高度的分布,并给出了起跳粒径有分布时颗粒的平均粒径随高度的分布 ...
马富华, 钟钊新, 刘大有
core   +2 more sources

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