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红外相机 - Open Access .click
Results 31 to 40 of about 512 (67)

Dimensional Assembly Engineering of Ce‐MOF Interfaces for Selective Recognition of Phytic Acid

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Selective molecular recognition is central to chemical sensing yet discriminating structurally similar molecules at complex interfaces remains challenging. Traditional strategies based on tuning size, charge, or binding‐site chemistry often suffer from limited flexibility.
Qiang Miao   +7 more
wiley   +1 more source

基于红外测温的零值和污秽绝缘子快速检测试验研究

open access: yesGaoya dianqi, 2015
红外测温技术具有不接触、不停运、不取样、检测速度快的优点,是绝缘子运行状态在线检测的重要方法之一。文中在绝缘子发热机理和红外热像技术的原理上,立足电力工作中零值和污秽绝缘子快速检测,分别对零值绝缘子位于绝缘子串不同位置时红外测温试验对比,以及对污秽绝缘子串与清洁串的红外测温对比,试验结果表明,当绝缘子串有严重污秽和零值绝缘子存在时,其热像表征图像发生明显的突变。此外,当零值绝缘子位于串中靠近高压端时,其热像图像显示零值绝缘子与相邻正常绝缘子平均温差最大,位于中部时与相邻正常绝缘子平均温差最小 ...
陈勇, 郭俊峰, 邬小均
doaj  

基于红外相机监测研究四川米亚罗自然保护区牦牛放牧对鬣羚活动节律的影响

open access: yes野生动物学报, 2021
鬣羚(Capricornis sumatraensis)的活动节律是鬣羚保护工作的关键基础之一,牦牛(Bos grunniens)放牧是当地牧民在鬣羚栖息地进行的日常活动,研究牦牛放牧活动对鬣羚的活动节律的影响对于做好鬣羚保护工作具有重要意义。传统方法不适用于夜间活动的鬣羚活动节律的监测,热红外技术能够监测具有温度的目标对象,不受白天黑夜的影响,非常适合鬣羚监测。借助红外相机获取鬣羚和牦牛的活动照片;根据独立有效照片数量计算鬣羚和牦牛在不同时段和不同月份的相对活动丰富度指数 ...
刘怀君 1   +1 more
doaj  

Biomass‐Engineered Defect‐Rich g‐C3N4 Anchors Pd2+‐Rich Ultrafine Particles for Highly Efficient Formic Acid Dehydrogenation

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Formic acid (FA) is considered to be a safe and convenient hydrogen source; however, achieving controlled and efficient FA dehydrogenation under mild conditions using stable solid catalysts remains a significant challenge. Pd‐based catalysts have been extensively studied due to their superior catalytic activity to other metal catalysts.
Shuai Wei   +10 more
wiley   +1 more source

Use of species’ responses to cryptic anthropogenic disturbances for monitoring biodiversity outcomes in tropical forests

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero   +5 more
wiley   +1 more source

Sun Bear Ecology and Conservation: Multiscale Habitat Associations in Southeast Asia 马来熊的生态与保护:东南亚地区的多尺度生境关联研究

open access: yesIntegrative Conservation, Volume 5, Issue 1, Page 125-136, March 2026.
We collated detections of the sun bear from new and previously published camera trap studies across its range. We then analysed these detections at two different spatial scales to assess the habitat associations and diel activity of this species. We found that the sun bear is tolerant to moderate habitat disturbances. ABSTRACT Degraded tropical forests,
Alexander Hendry   +5 more
wiley   +1 more source

基于红外相机影像的中华穿山甲体长估计和个体识别

open access: yes野生动物学报
中华穿山甲(Manis pentadactyla)夜行穴居,体表覆盖鳞片,个体外观特征差异较小,基于红外相机影像拍摄到的体貌特征进行个体识别较难,因此探讨一种基于红外相机影像与比例尺估测体长进行中华穿山甲个体识别的方法。在笼舍内布设不同高度的红外相机并拍摄中华穿山甲影像,利用ImageJ软件计算中华穿山甲在红外相机影像中的体长测量值,并计算在不同高度条件下红外相机拍摄的中华穿山甲体长误差值。结果表明:红外相机最佳的布设高度为0.8 m,相对误差为2.76%。基于上述结果 ...
张奕航   +6 more
doaj  

珲春再现东北虎

open access: yes野生动物学报, 2004
2004年1月16日夜,吉林珲春自然保护区管理局使用国际野生生物保护学会捐赠的远红外线自动照相机第二次成功拍摄到野生东北虎照片。
李志兴
doaj  

基于无人机红外测试的500kV架空线路在运复合绝缘子温度场特征分析

open access: yesDianci bileiqi, 2020
为提升现场复合绝缘子红外测试判定准确率,对现场新投运的123支500 kV复合绝缘子开展基于无人机的红外测试,并提取复合绝缘子温度曲线,统计温差、温度梯度特征,对正常复合绝缘子自身不同部位温度差异的原因进行了讨论,并给出了抑制温度曲线高频干扰的方法。结果表明,现场正常复合绝缘子有相当比例温差超过2 K。正常复合绝缘子温度曲线存在高频变化分量,其来源于伞裙与芯棒之间的温差、红外图像清晰度不足产生的局部温度振荡。通过小波分解与低频分量重构,可有效抑制上述高频分量产生的温差,从而减小现场红外测试结果误判概率。
李特   +6 more
doaj  

环境条件对基于无人机红外检测的零值绝缘子检测判据的影响研究

open access: yesDianci bileiqi, 2023
随着红外测量技术的不断进步,对绝缘子状态进行红外热像检测逐步应用于电网的日常巡检中,但测量结果受环境因素影响显著。以输电线路现场运行中瓷绝缘子作为研究对象,分别在不同光照强度、湿度、温度与风速下采集绝缘子的红外图像,研究环境因素对绝缘子红外检测的影响规律。研究结果表明,当采用基于绝缘子串温度曲线的判别方法时,光照强度容易引起零值绝缘子的误判,温度变化对零值绝缘子检测没有影响;湿度变化会影响绝缘子钢帽的温升;在强风条件下,各绝缘子钢帽温度相同,不适合进行绝缘子红外检测。研究成果可用于指导电网红外巡检工作 ...
尹林   +9 more
doaj  

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