Results 21 to 30 of about 367,603 (169)
Dianci bileiqi, 2023 目前传统的高光谱污秽检测主要针对人工涂污样本。而运行复合绝缘子由于结构和自然积污复杂、基材浸污严重，难以运用其方法进行污秽检测。因此搭建了适用于绝缘子污秽检测的高光谱拍摄平台，并提出了一种基于高光谱的运行复合绝缘子污秽检测技术。首先，针对绝缘子光谱特性，提出了一种基于噪声学习的一维卷积降噪自动编码器(1D-RDCAE)高光谱数据转换方法，消除不同拍摄情况导致的谱线偏移现象。其次通过核主成分(KPCA)提取不同污秽程度的光谱特征；分别建立基于线性判别算法(LDA)、BP神经网络(BPNN)以及极限学习机 ...
马御棠 +5 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Achieving rapid and selective separation of anode and cathode materials remains a critical challenge in the recycling of spent lithium‐ion batteries. This study develops a microwave‐enhanced flotation strategy for the efficient recovery of cathode and anode materials.
Peiyuan Ye +5 more
wiley +1 more source
Guangtongxin yanjiu, 2011 采用分布傅里叶方法模拟了光子晶体光纤超连续谱的产生,分析了超连续谱的产生机理与不同光子晶体光纤超连续谱的特点,分析结果表明,在正常色散区可以获得高质量超连续谱。优化光子晶体光纤结构,利用脉宽为100fs、峰值功率为500W的高斯脉冲通过10m长的优化光子晶体光纤,在1 550nm波段获得了宽度为210nm、平坦度为3dB的超连续谱。
朱瑞莲, 闫连山, 李立广
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Gaoya dianqi, 2022 湿热环境中，硅橡胶含水率过高会导致复合绝缘子老化加剧及温度升高等问题，目前缺乏一种能够对运行硅橡胶绝缘子含水率带电检测的手段。文中提出一种基于激光诱导击穿光谱技术的硅橡胶含水率检测方法，研究了延迟时间、激光能量等参数对于光谱质量的影响，并且比较了不同特征谱线强度与含水率的定标结果。结果表明，延迟时间为3μs时光谱质量最优，此时连续背景谱几乎衰减消失并且线性谱仍保持一定强度；激光能量较高时，水分在高温下蒸发对等离子体形态的影响程度提高，进而削弱特征谱线强度随含水率的变化趋势，激光能量为35.4、44.7 ...
周卓伟 +4 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Currently, the photocatalytic performance of ZnO has been severely limited by its weak light response ability and sluggish charge carrier dynamics, which considerably hinder its extensive application in photocatalytic fields. Herein, through anchoring the synthesized K6PMo11FeO40·nH2O (PMo11Fe) onto ZnO nanosheets, a novel S‐scheme ...
Xinjia Zhang +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 开展夏玉米冠层SPAD值监测技术研究，建立叶绿素含量与敏感波段、光谱指数间的定量关系模型，以促进高光谱技术在玉米快速、无损长势监测及水肥精准管理的应用。以小型蒸渗仪夏玉米光谱反射率与植株冠层SPAD值的监测为基础，研究了夏玉米植株冠层光谱信息与SPAD值的响应关系，并优选出监测夏玉米冠层SPAD值的敏感波段与最优光谱指数。结果表明：夏玉米冠层光谱反射率在可见光波段随玉米冠层SPAD值增加而下降，在近红外波段却与之相反；采用原始光谱反射率、一阶微分光谱监测夏玉米冠层SPAD值的最敏感波段分别为700 ...
刘露 +5 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Platinum‐based electrocatalysts are fundamentally constrained by strong oxygen binding, which restricts the oxygen reduction reaction (ORR) kinetics, and by severe CO poisoning, which hinders the methanol oxidation reaction (MOR). To address these limitations, we synthesized PdPtRuIrRhNi high‐entropy alloy (HEA) mesoporous nanotubes that ...
Hong Pan +6 more
wiley +1 more source
, 1989 本文对光学光谱分析仪OSA WP-4系统做了一般介绍,对该系统用于研究激波管光谱的优点和特点做了分析。在激波管不同的状态下,对研究气体(Ar+H_2),用OSA WP-4系统在快门和直流累积光辐射条件下,得到了H_α、H_β线的清晰光谱线轮廓;对H_β线形进行了测量分析,得到了半宽度△λ_(1/2)和峰峰间距△λ_(pp)及其它们之间的关系;也得到了△λ_(pp)与电子密度n_e之间的关系;实验结果与国外结果做了对比,并进行了分析讨论,取得了一些基本看法。实验证明:OSA WP ...
李鸿德 +3 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Ti‐15Mo‐2.5Ag alloy exhibited a low modulus and strong antibacterial ability but poor bioactivity. To resolve this problem, sandblasting and anodization were used to create a hydrophilic and nano‐Ag2O‐containing TiO2 coating. Subsequently, the microstructure and physicochemical properties were investigated by scanning electron microscopy, X ...
Yanchun Xie +11 more
wiley +1 more source
四川大学学报. 自然科学版, 1997 研究了电阻炉生长的Ｎｄ∶ＹＡＧ晶体中色心的吸收光谱、激发光谱和发射光谱以及热处理和辐照对光谱特性的影响．分析了色心形成的机理．用含色心的Ｎｄ∶ＹＡＧ棒做激光实验，观察到超辐射输出．
张邦星, 王化莹
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