Results 51 to 60 of about 12,423 (168)
基于逐次变分模态分解的飞轮-火电一次调频控制策略 [PDF]
全球能源互联网随着新型电力系统的大力建设与推广，火电机组面临的调频压力增大，提出一种逐次变分模态分解的飞轮-火电一次调频控制策略。首先，以飞轮储能和火电机组为研究对象，建立考虑新能源占比的飞轮-火电一次调频模型；其次，将一次调频功率指令利用逐次变分模态方法分解，由火电机组响应分解后的低频功率指令，同时设计飞轮储能下垂优化控制方法，实现飞轮储能与火电机组响应频率变化的协同控制；最后在不同工况下仿真验证，结果表明所提策略可有效避免火电机组一次调频时的频繁出力，减小火电机组响应频率变化时的调控要求 ...
张萍, 刘海涛
doaj +1 more source
A Review of UWB Radar Detection of Respiration and Heartbeat Signals in Different Scenarios [PDF]
Due to their many advantages, such as simple structure, low transmission power, strong penetration capability, high resolution, and high transmission speed, UWB (Ultra-WideBand) radars have been widely used for detecting life information in various ...
Bo ZHOU +6 more
core +1 more source
, 2022 针对齿轮点蚀故障特征难以提取的问题，提出了一种基于改进变分模态分解的齿轮点蚀故障诊断方法。利用经验模态分解自适应分解的特点，将各分量的能量占比作为有效分量的判断依据，并据此设定变分模态分解算法的模态个数，在此基础上，以变分模态分解分量的排列熵和最小值作为适应度函数，用遗传算法对惩罚因子进行搜索；根据所得结果设置变分模态分解参数，并对齿轮点蚀信号进行处理；筛选合适的本征模态函数进行包络调解，通过包络谱图分析齿轮点蚀故障的特征信息。对齿轮实验信号的分析表明，与现有方法相比 ...
冯淦淇 +5 more
core +1 more source
Functional Ecology, Volume 40, Issue 5, Page 1151-1164, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo +8 more
wiley +1 more source
Review on idler fault diagnosis and coordinated control in belt conveyors [PDF]
As a critical component of belt conveyors, idlers are prone to frequent failures, significantly impacting the efficiency and safety of coal mine operations.
BAO Jianjun +6 more
core +1 more source
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
Research progress and prospect of intelligent prediction and disaster risk assessment of open-pit mining surface deformation [PDF]
Research on the prediction and disaster risk assessment of surface deformation in open-pit mines serves to improve the accuracy of disaster warning and make safety control decisions.
GENG Huikai +5 more
core +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Sodium‐ion batteries (SIBs) have emerged as promising candidates for large‐scale energy storage due to their cost‐effectiveness and resource abundance. However, challenges such as sluggish ion diffusion kinetics, structural degradation, and interfacial instability hinder their practical applications.
Yunze Wang +7 more
wiley +1 more source
Research on Dynamic Cable Fastening State Monitoring based on Distributed Acoustic Sensor Detection [PDF]
【Objective】The dynamic cable of the floating wind turbine in the deep sea enters the sea from the sea surface until it is buried on the seabed. The reliability of the dynamic cable is very important for the safe and stable operation of the floating wind ...
AN Bowen +5 more
core +1 more source
Direct Observation of Matrix‐to‐Precipitate Elemental Diffusion in Severe Plastic Deformation
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Elemental redistribution, particularly the solute exchange between the matrix and precipitates, is a central issue in alloys subjected to severe plastic deformation (SPD). To elucidate this behavior, a nickel–aluminum bronze (NAB) alloy was processed by high‐pressure torsion (HPT), and its microstructural evolution was systematically ...
Xiaobin Yang +9 more
wiley +1 more source