Results 21 to 30 of about 12,423 (168)
Conservation Biology, EarlyView.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Dianci bileiqi, 2021 针对雷击输电系统发生雷击干扰和雷击故障时无法快速、准确的识别雷击类型,做出有针对性的防雷措施,提出一种综合的雷击类型识别方法。首先,根据雷击暂态电压信号波形的单调性和对称性构造积分判据的方法来识别非故障和故障性雷击;然后,结合暂态电压信号能量特征值的分布特点构造高低频能量比值判据,识别非雷击,雷击和短路故障;针对希尔伯特一黄变换（Hilbert-Huang Transform,HHT）中经验模态分解（Empirical Mode Decomposition,EMD）对原始信号分层时存在的边际效应 ...
宋晓星 +3 more
doaj
Accelerated random noise suppression of seismic data using compressed singular-value decomposition [PDF]
Random noise is one of the common background noises in seismic data, and its attenuation will directly affect the signal-to-noise ratio of seismic data, which is of great significance to improve the quality of seismic data.
LIN Peng +4 more
core +1 more source
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source
Research review on life-cycle health management and intelligent maintenance of coal mining equipment [PDF]
In recent years, with the rapid development of intelligent technology in coal mines, the whole life cycle health management and intelligent maintenance technology of coal mine equipment has attracted wide attention.
Fuyuan ZHAO +10 more
core +1 more source
Conservation Biology, EarlyView.Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando +54 more
wiley +1 more source
Gaoya dianqi, 2020 为了抑制局部放电（PD）信号中含有的窄带周期干扰和白噪声,提出一种基于优化的变分模态分解（VMD）阈值去噪方法。首先针对VMD算法可能造成染噪信号欠分解或过分解的问题,提出一种基于频谱分析和四分位数的模态分解数K值优化方法,并结合模态的峭度特征去除窄带周期干扰和高频白噪声;针对PD信号主导模态中残留的白噪声,利用文中研究中发现的VMD分解白噪声所得模态的两个统计特性,提出一种噪声标准差估计方法来确定阈值,最后引入间隔阈值函数对PD信号主导模态进一步去噪。采用该方法对仿真和实测信号进行去噪处理 ...
佘昌佳 +5 more
doaj
基于GWO-LSTM与NKDE的变压器油中溶解气体体积分数点——区间联合预测方法
Gaoya dianqi, 2022 变压器油中溶解气体体积分数是表征变压器健康状态及故障特性的重要参量。因此，准确预测变压器油中溶解气体的体积分数，有助于及时把握变压器的状态演化与故障发展趋势。现有对气体体积分数预测的研究多集中在点预测方面，难以全面反映气体体积分数的不确定性信息。针对此问题，提出了一种基于灰狼优化长短期记忆网络（long short-term memory based on grey wolf optimization,GWO-LSTM）与非参数核密度估计（non-parametric kernel density ...
栗磊 +6 more
doaj
Anomaly Detection for Photovoltaic Based on Improved VMD-XGBoost-BiLSTM Combination Model [PDF]
Photovoltaic is a vital and rapidly developing form of renewable energy generated in China, and anomaly detection is a crucial reference for making decisions on its system operation and maintenance.
Bochao ZHAO, Jiajun MA, Lei CUI, Wenpeng LUAN, Jing ZHU
core +1 more source
Learning Styles, Engagement and Anxiety in AI‐Mediated Writing: A Multimodal Feedback Study
International Journal of Applied Linguistics, EarlyView.ABSTRACT Artificial intelligence (AI) tools now permeate English academic writing. However, evidence on how feedback modalities align with student differences and with psychological mechanisms remains limited. Prior work often reduced learning styles to simple matches with delivery modes and treated learning engagement and writing anxiety as peripheral.
Yi Ren +3 more
wiley +1 more source