Results 121 to 130 of about 16,106 (169)

横向偏移法测量单模光纤模场直径的主要条件

open access: yesGuangtongxin yanjiu, 1989
本文就横向偏移法单模光纤模场直径(MFD)测量中两光纤端面的三种典型耦合状态对测量结果的影响作了详细的研究,分别阐明了三种状态的影响机理和影响程度,澄清了各耦合状态下传输功率变化和MFD测量误差之间的关系并给出了测量中合适的耦合条件。
姜正权
doaj  

[Intermuscular coupling based on wavelet packet-cross frequency coherence]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2020
Du Y, Bai X, Yang W, Zheng L, Xie P.
europepmc   +1 more source

[Development of a balloon sensor device for force-electrical coupling measurement of esophagus]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Ran P   +5 more
europepmc   +1 more source

森林植被不同尺度的碳水过程及耦合机制研究进展

open access: yesShuitu Baochi Xuebao
[目的] 陆地生态系统中的碳循环和水循环是陆地生态系统物质和能量循环的核心,也是连接地圈、生物圈和大气层的纽带。森林植被是陆地生态系统的重要组成部分,是表征陆地碳-水循环的重要变量,在维持生物圈和大气圈的动态平衡中发挥着重要作用。目前,对陆地生态系统中碳-水循环的耦合关系和机制缺乏系统的分析和总结。[方法] 从森林植被碳与水过程及其相互作用、植被水分利用和耦合机制的角度,综述了森林植被碳与水循环过程及其相互作用的研究与进展,以及不同空间尺度(叶片到区域/全球尺度)碳-水耦合的定义、方法、进展和展望 ...
余新晓, 武昱鑫, 贾国栋
doaj  

[Abnormal functional connectivity and structure-function coupling of the nucleus accumbens in patients with major depressive disorder]. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Zhao X   +9 more
europepmc   +1 more source

[High stability enhanced ultrasonic microfluidic structure with flexible tip coupled bubbles]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu Y, Zhou Y, Zhang W, Chen S, Liang S.
europepmc   +1 more source

[Prediction method of paroxysmal atrial fibrillation based on multimodal feature fusion]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li Y   +5 more
europepmc   +1 more source

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