Results 101 to 110 of about 35,394 (159)
Zhongguo shiyan zhenduanxue, 2003 目的 探讨一种股骨颈前倾角术中新的测量方法。方法 应用自制股骨颈前倾角测量仪 ,术中测量 16例先天性髋关节脱位的 2 0个股骨颈前倾角和 5例解剖标本的 10个股骨颈前倾角 ,30个髋关节均行CT测量股骨颈前倾角以验证术中测量值的准确性。结果 术中测量值x±s为 37.37± 15 .0 5 ,CT测量值x±s为 37.17± 14 .0 4 ,经统计学处理无显著差异性 （P >0 .5 ）。结论 该仪器术中测量值准确 ,操作简单易行 ,省时 ,是一种无损伤性操作。该仪器具有临床使用价值。
张德光 +4 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The Schottky barrier height (SBH), which serves as a pivotal determinant of charge carrier injection efficiency in electronic devices, critically governs electrical behavior at metal/semiconductor interfaces. However, pronounced metal‐induced gap states at metal contact interfaces induce Fermi‐level pinning, which constrains the ...
Xiaofei Liu +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Multimodal luminescent materials are crucial for advanced information encryption, real‐time dosimetry, and high‐resolution bioimaging, yet integrating orthogonal stimulus‐responsiveness into a single‐component system is challenging. Herein, we report a Pr3+‐doped Ca3Ga2Ge3O12 (CGGO: Pr3+) garnet phosphor that exhibits orthogonally addressable ...
Qi Chen +10 more
wiley +1 more source
Gaoya dianqi, 2011 针对传统的局部放电检测方法在线测量时易受外界干扰的问题,笔者在实验室建立了变压器中典型局部放电的模拟系统,并用超高频宽带和窄带测量系统对其测量,分析比较两种测量系统性能上的不同。经测量分析得出,超高频窄带检测方法对检测信号的中心频率和带宽可调,可以选择合适的频带来避开干扰测量,抗干扰能力很强;超高频宽带检测方法检测频带宽,可以检测到更丰富的局部放电信息。
李梅
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Narrowband near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) featuring low full‐width at half maximum (FWHM) and high conversion efficiency are crucial for chemical content evaluation, light therapy, and bioimaging.
Chunshen Li +4 more
wiley +1 more source
Gaoya dianqi, 2008 为了提高XLPE电缆直流法在线监测的测量精度,需对微弱直流信号进行测量。笔者介绍了XLPE电缆直流法在线监测系统中微弱直流信号测量电路的设计方案,分析和比较了几种初级放大电路的性能,研究了测量电路中的几个关键模块设计。试验结果表明,该测量电路的设计方案可以较精确地测量约为1nA的直流信号,平均误差约为2%,能够满足监测系统对信号的精度要求。
赵勇, 郭亮, 成永红
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Platinum (Pt)‐based catalysts are crucial for the commercialization of hydrogen/metal air batteries, but they suffer from Pt scarcity, high cost, and nanoparticle dissolution/agglomeration, mainly leading to performance degradation. We address this by synthesizing a PtFe alloy catalyst (PtFe–PA–NC) via a phytic acid (PA) assisted pyrolysis ...
Chenyang Shu +9 more
wiley +1 more source
Gaoya dianqi, 1997 测量高电压的方法很多,对于稳态高电压的测量,其方法有:静电电压表法测量、多种分压器法测量等。各种测量方法都有它自身的特点。如静电电压表,它可以测量交、直流电压的有效值,其电压可以是一点接地的,也可以是不接地,对称的高压,且输入阻抗极高（绝缘电阻）,此法对容量较小的高压电源来说,是一种极佳的测量方法,只是静电电压表的原理是利用极板间所加电压产生的静电力进行测量的,所以,环境条件对表计的工作有很大的影响,若有空气流动时,就会影响其读数,一般仅用于户内;又由于此种仪表体积较大、重量也较重,携带很不方便 ...
肖如泉 +4 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Tellurium (Te), emerging as a promising alternative to sulfur (S) and selenium (Se), offers significant advantages for potassium (K) ion storage due to its comparable theoretical volumetric capacity (2619 mAh cm−3) and higher electronic conductivity (∼102 S m−1), which promotes rapid charge transfer and improves reaction kinetics.
Sung Woo Cho +7 more
wiley +1 more source
Gaoya dianqi, 2007 分析了传统的谐波分析法在介损测量中存在的问题,研究了两种改进的测量介损的算法——加窗插值FFT法和基于小波的介损测量方法,对比了各种方法的优缺点。现场实际测量表明,两种方法均能有效提高介损测量的准确性。
杨晓东, 唐超, 廖瑞金
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