Results 11 to 20 of about 5,044 (195)
Key n‐Gram Extractions and Analyses of Different Registers Based on Attention Network
Journal of Applied Mathematics, Volume 2021, Issue 1, 2021., 2021 Key n -gram extraction can be seen as extracting n‐grams which can distinguish different registers. Keyword (as n = 1, 1‐gram is the keyword) extraction models are generally carried out from two aspects, the feature extraction and the model design.
Haiyan Wu +5 more
wiley +1 more source
Gaoya dianqi, 2021 为研究红外及紫外成像技术检测零值绝缘子的有效性,试验采集了不同湿度和污秽度下,零值绝缘子处于绝缘子串不同位置时的红外热像图和紫外视频,分析了绝缘子串的发热、放电特性。利用有限元软件建立了热—电耦合场仿真模型,计算验证了不同条件下绝缘子串的温度及电场分布。研究表明:污秽干燥条件下,绝缘子串不易放电,紫外成像法无法有效检测零值绝缘子,红外热像图显示正常绝缘子的温升明显高于零值绝缘子温升,红外成像法可以有效检测零值绝缘子;污秽湿润条件下,由于高电导率的重污秽以及污秽受潮的不均匀性 ...
王胜辉 +4 more
doaj
Hyperspectral outcrop models for palaeoseismic studies
The Photogrammetric Record, Volume 34, Issue 168, Page 385-407, December 2019., 2019 To overcome the limitations of the traditional study of palaeoseismic trenches, a new workflow is presented that integrates infrared hyperspectral and photogrammetric data. This method was applied on two palaeoseismic trenches excavated across a post‐glacial fault scarp in northern Finnish Lapland.
Moritz Kirsch +19 more
wiley +1 more source
极端环境下SF6气体红外热成像检漏技术在GIS带电检测中的效果加强方法研究
Gaoya dianqi, 2021 SF6红外成像检漏技术具有非接触式和高灵敏度的优点,然而对于某些观测环境复杂、背景干扰较多的场景,直接使用红外热成像检漏仪进行SF6气体检漏往往难以取得理想效果。针对上述情况,文中基于工程实际提出并研究了两种便捷可行的检漏效果加强方法,设计并完成相关实验以对其效果提升进行定量评估。一是利用负电晕检测技术与红外成像检漏仪联合检测,通过两种方法在不同适用场景下的互补提升SF6气体检漏的适用范围;二是针对特定场景,采用自加热金属板等方法改善拍摄背景和周围温度,有效提升红外成像效果 ...
许侃 +5 more
doaj
Infrared image segmentation algorithm based on distribution information intuitionistic fuzzy c-means clustering [PDF]
, 2020 Due to the sensitivity of the traditional intuitionistic fuzzy c-means (IFCM) clustering algorithm to the clustering center in image segmentation,which resulted in the low clustering precision,poor retention of details,and large time complexity,an ...
Fankui HU, Shuo HUANG, Xiaofei WANG
core +1 more source
基于Mask-RCNN算法的复合绝缘子串红外图像分割与温度读取
Gaoya dianqi, 2021 红外成像可以快速发现复合绝缘子异常温升,从而实现缺陷检测。为了解决复合绝缘子红外检测中人工诊断时间成本高、效率低、背景干扰多的问题,文中提出了基于Mask-RCNN的温升绝缘子自动检测方法。首先使用Mask-RCNN对红外图像数据进行学习训练,进而对其中的绝缘子目标进行识别检测和图像分割。在智能分割之后,通过识别图中的温度范围数据并将绝缘子区域图像灰度与之比对,得到了绝缘子的温度信息,用于绝缘子异常发热故障的诊断。实验研究表明:在对南方某市绝缘子红外测温图像的自动识别中,Mask-RCNN有着优异的表现,
黄新宇 +5 more
doaj
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Mechanoluminescent materials have gained significant attention for their unique capability to convert mechanical stimuli into light without external optical or electrical excitation, holding immense promise for applications in safety monitoring, biomedicine, optical anti‐counterfeiting, and intelligent sensing.
Fanlei Qin +8 more
wiley +1 more source
A precise two dimensional tracking servo system based on CANopen bus [PDF]
, 2016 在航空航天、民用、军事领域都起到重要作用的双自由度转台是一种复杂的集光机电一体化的设备，整体设备的精度和性能将直接受其性能的影响。因此，如何同时获取良好的动态性能、较小的体积重量、足够的旋转扭矩以及较小的噪声振动是本文亟需解决的问题。 本文根据中波红外光谱分析技术和长波红外成像双波段结合的红外光谱仪设备技术要求，设计了双自由度转台。该转台采用美国COPLEY公司的CANPCI卡作为CAN通讯卡，两台COPLEY驱动器分别作为主机与从机直接驱动作为执行机构的两台交流伺服电机，实现两个自由度上的运动 ...
欧阳琪楠
core
Early spoilage detection of apple based on generative adversarial network and Mask R-CNN [PDF]
[Objective] To improve the detection accuracy of early apple spoilage zone. [Methods] An apple spoilage detection method was proposed based on generative adversarial network and convolutional neural network.
JI Yu +4 more
core +1 more source
International Journal of Applied Linguistics, Volume 35, Issue 3, Page 1134-1148, August 2025.ABSTRACT E‐books, powered by multimedia and interactive features, are widely used to support young children's language and literacy development. This study examines the relations of e‐book narration and bilingual parent–child talk to children's learning during shared reading. Data from 121 English learners in China and their parents were analyzed using
Dandan Yang +3 more
wiley +1 more source