Results 1 to 10 of about 13,728 (118)

Functional homogenization of terrestrial mammals outside protected areas in the Hengduan Mountains, China

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li   +8 more
wiley   +1 more source

SF6气体红外成像检漏仪与定量检漏仪现场使用经验探讨

open access: yesGaoya dianqi, 2014
通过应用SF6红外成像检漏仪与SF6定量检漏仪进行模拟、对比试验,对SF6红外成像检漏的检测灵敏度进行量化研究,同时研究了风速、温度等外部因素对检测灵敏度的影响情况,对SF6红外成像检漏仪与SF6定量检漏仪的现场使用经验进行了有益的探索。
胡连清   +4 more
doaj  

Plasmon‐Enhanced NaYF4:Yb/Er/Tm UCNPs Fluorescent Biosensing for Ultrasensitive Detection of GP73 in Clinical Liver Cancer Diagnosis

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Early diagnosis of liver cancer demands high sensitivity, high specificity, convenience and real‐time monitoring capabilities. However, it encounters challenges such as low concentration of markers, numerous interfering factors, and limitations of detection technologies.
Changsheng Shi   +10 more
wiley   +1 more source

铁原子团簇对红外激光吸收特性的实验研究

open access: yes四川大学学报. 自然科学版, 1997
作者报道了由nm级和μm级粒度的铁原子团簇,对近红外激光(波长1.06μm)和中红外激光(波长10.6μm)吸收特性的实验研究.结果表明 ...
赖晓霞, 宋定熙
doaj  

Constructing Asymmetric Cu–OV–Mn Sites on MOFs‐Derived Cu‐MnOx Microspheres With Abundant Oxygen Vacancies for Enhanced Photothermal VOC Degradation

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT With the growing severity of volatile organic compounds (VOCs) pollution, metal‐organic frameworks (MOFs)‐derived materials offer a promising solution through efficient photothermal catalysis. In this paper, M‐MnOx (M = Cu, Ni, Co, Fe) catalysts derived from manganese‐based MOFs were successfully prepared by the sacrificial template method and
Yizhong Liao   +10 more
wiley   +1 more source

远红外节能碳化硅砂烘道

open access: yesDianci bileiqi, 1997
碳化硅避雷器的主要元件──阀片是由碳化硅砂制作而成的,我厂在原有的节能措施基础上,与电子部53所红外所合作,设计制造了远红外节能碳化硅砂烘道,进一步实现了节约用电。本文介绍了远红外节能碳化硅砂烘道的原理、结构、并对其经济效益进行了分析,为在电瓷烘房、窑炉中采用远红外技术奠定了基础。
王永亮, 王崇新
doaj  

Antagonistic effect of Curcuma wenyujin on immunologic genetic injury of male mice induced by UV(温郁金对紫外线致雄性小鼠免疫遗传损伤的拮抗效应)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2013
以ICR雄性小鼠为实验动物、以紫外线为诱变剂,研究了温郁金对紫外线致ICR雄性小鼠免疫遗传损伤的拮抗效应.采用了小鼠骨髓嗜多染红细胞(polychromatic erythrocyte,简称PCE)微核实验等方法.测定了小鼠血象、血红蛋白含量、胸腺及脾指数,小鼠肝脏过氧化氢酶(catalase,简称CAT)活性,小鼠骨髓嗜多染红细胞(PCE)的微核率等指标.结果显示:实验剂量的温郁金均能使紫外线引起脾脏指数和胸腺指数、红细胞数、白细胞数以及血小板数、血红蛋白含量和CAT活性的下降明显回升 ...
QIANXiao-wei(钱晓薇)   +4 more
doaj   +1 more source

金属柱体粉末的红外吸收特性

open access: yes四川大学学报. 自然科学版, 1995
金属柱体粉末的红外吸收特性冯良桓,蔡亚平,孙小松,刘军(材料科学系)陶德元(无线电电子学系)面对多样化的红外探测手段,需要采用多种隐身措施,这些措施可概括为:1.改变武器系统及攻击目标的红外辐射特性及热外形;2.降低或调整辐射强度,使之与环境一致;3...
冯良桓   +4 more
doaj  

避雷器的常见故障及红外诊断

open access: yesDianci bileiqi, 2007
对运行中的避雷器进行在线红外诊断是电力设备带电诊断行之有效的技术手段。分析了FS、FZ、FCZ、FCD型避雷器和金属氧化物避雷器在正常状态和故障状态的发热特点,认为避雷器故障主要是受潮引起的,热像特征主要表现为局部温升。用红外热像仪对运行中的避雷器进行红外测温和故障分析,结果表明,应用红外诊断技术检测避雷器故障,可靠性较高。
李庆玲, 程济兵, 张明智
doaj  

基于多特征融合的电压致热型设备故障检测 附视频

open access: yesDianci bileiqi, 2022
大部分的电压致热型设备由于温升不明显,故障判断难度较大,并且红外图像受到背景复杂,尺寸多的影响,导致红外图像特征提取困难,另外,大多数现有的检测工作依靠人工判别,且存在判断分歧。目前,代替人工判别的研究中,许多只利用单一的特征来表征热图像中的故障特征。针对此类问题,笔者提出一种基于多特征融合的电压致热型设备故障提取方法。此方法将红外图像多故障目标检测算法和多特征融合算法相结合,建立动态决策准则。首先提取红外图像的三种典型特征,包括颜色、纹理和轮廓特征,继而通过融合算法(串行融合、并行融合和DCA ...
doaj  

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