Results 41 to 50 of about 10,650 (169)
Gaoya dianqi, 2009 根据高压断路器状态信息的多层次性和多因素性,建立高压断路器状态评估的层次型指标体系。利用模糊综合评判法,建立高压断路器运行状态评估模型,通过对各层评判因素的评估,综合得出断路器的具体运行状态。指标的权重先由层次分析法确定常权权重,然后引入基于均衡函数的变权模式,对常权进行修正得到变权,以提高状态评估的准确性,为高压断路器状态评估提供了一种新的思路。
陈伟根, 魏延芹, 廖瑞金
doaj
Deep quantile regression for growth and maturation reaction norms
Methods in Ecology and Evolution, Volume 17, Issue 1, Page 111-124, January 2026.Abstract Understanding species' growth and maturation responses to anthropogenic and environmental pressures is crucial for tracking demographic shifts, phenotypic change and ensuring population sustainability. Traditional regression methods often focus on modelling the conditional mean of life‐history traits, potentially overlooking heterogeneity in ...
Guankui Liu +4 more
wiley +1 more source
Design and Implementation of Online Monitoring System for HVDC Breaker Based on GPRS and PAC [PDF]
, 2014 近年来随着我国坚强智能电网的快速建设和发展，越来越多的系统应用环节需要使用远程在线监控技术，人们对远程监控的实时性、可靠性和功耗的要求也越来越严格。高压直流开关作为高压直流输电网络中的重要组成部分，对它的各项基本参数和运行状态参数的测量也一直是直流输电技术的研究难点之一，主要原因在于：（1）信号采集困难：它是高压设备，作用时会释放巨大的能量；（2）信号传输困难：设备处于高压运行环境，与地面存在较大的绝缘间隔，无法使用有线通讯传输方式；（3）参数无法直接获得：设备自身没有相应的信号传感设备 ...
许登华
core
Strategy and practice of smart meter rotation based on error estimation [PDF]
In response to the deficiencies in the operation and maintenance of China’s power grid regarding the replacement of expired smart meters and batch sampling rotation, a rotation strategy for estimating the operation error of smart meters based on data ...
AI Yuan +5 more
core +1 more source
Wildlife Letters, Volume 3, Issue 4, Page 152-160, December 2025.This study provides an up‐to‐date assessment of the Far Eastern leopard population in the Primorsky Krai. Analysis based on camera trap monitoring data conducted in the protected areas of the southwest of Primorsky Krai in 2022. A total of 116 individuals were identified: 104 adults and 12 cubs.
Taisiia V. Marchenkova +8 more
wiley +1 more source
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Forest cover is positively associated with fish biomass and fisheries yield in the Amazon River floodplain, and many species enter flooded forests to feed, spawn, or seek refuge from predation. Floating macrophyte beds, known as floating meadows, in Amazon floodplains support high fish diversity and serve as nursery habitat for many fishes of ...
Sam Grinstead +6 more
wiley +1 more source
Gaoya dianqi, 2016 为了对断路器操动机构的分、合闸弹簧（简称弹簧）储能状态进行评估,将模糊综合评判应用到高压断路器的弹簧状态评估中。选取反映断路器弹簧储能状态的典型特征参量,建立评判因素集;根据断路器弹簧的实际状态情况,建立评判等级集;采用专家估计法与层次分析法,建立评判的权重集;构建隶属函数描述评估因素与状态等级间的模糊关系,确定模糊算子及结果处理方法,进而完成整个模型用以对断路器弹簧状态进行综合评估。LW25-126型断路器上的实例验证表明,该模型可以客观有效地评估高压断路器弹簧的储能状态。
赵思洋 +5 more
doaj
Logistic回归和支持向量机在电缆老化状态评估中的应用与比较
Gaoya dianqi, 2023 电缆老化状态评估主要有物理模型和统计模型两大类，物理模型一般用于电缆个体老化评估，但难以用于在线评估，统计模型一般用于电缆整体老化评估，无法评估个体状态。为建立电缆运行数据与电缆老化状态之间的关联关系，在线评估电缆个体老化状态，文中提出了基于机器学习的电缆老化状态评估方法，建立了Logistic回归和支持向量机这两种机器学习模型，采用十折交叉验证对模型准确率进行了评估，同时计算了模型的F1-Score。结果表明支持向量机采用多项式核时的总体样本准确率平均值为96%，高于Logistic回归 ...
谭笑 +5 more
doaj
Design and Implementation of Condition Monitoring System for Power Transmission Equipments [PDF]
, 2014 输电线路是电力系统的重要组成部分。随着电力建设的快速发展，电网规模的不断扩大，电网的建设和设备维护工作变得越来越频繁。作为电力输送纽带的输电线路具有距离长、分散性大、难以巡视和维护等特点，需要人员定期巡检、定期维修，占用人员数量多，整体工作强度高，受环境和人为因素影响大，维护任务繁重。为提高输电线路的管理水平，增强电力系统运行的可靠性，迫切需要建立一套性能可靠，功能丰富的电力输电设备状态监测系统，这是输电线路检修和可靠运行的发展方向。 本文设计实现的输电设备状态监测系统采用Java技术路线 ...
马智
core
Veterinary Dermatology, Volume 36, Issue 6, Page 862-869, December 2025.ABSTRACT Background Chronic cases of canine otitis externa (OE) often develop infections with Pseudomonas aeruginosa (PA). Given the organism's high level of resistance, veterinary surgeons often turn to compounded solutions. Limited data describing the stability and potency of compounded ceftazidime (CAZ) solutions are available, which may affect ...
McKenna Snidow +6 more
wiley +1 more source