Results 41 to 50 of about 138 (91)

基于希尔伯特——黄变换的GIS超声波检测异常信号诊断

Gaoya dianqi, 2019
文中提出了一种气体绝缘组合电器（gas insulated switchgear,GIS）超声波检测异常信号的时频特征计算与诊断方法。首先运用希尔伯特—黄变换（Hilbert-Huang transform,HHT）得到描述超声波信号包络线的时频特征的Hilbert幅值谱。在此基础上,给出了离散条件下Hilbert边际谱与平稳性指数的计算方法,分别表示信号中各频率成分的总强度和平稳性。然后将Hilbert边际谱与平稳性指数结合起来分析,可以直观读取信号的时频特征,进而推断出异常气室的故障原因 ...
管敏渊, 楼平, 金国亮, 吴国强, 夏星航, 刘强, 姚建锋, 张晨宇   +7 more
doaj  

Challenges and suggestions for exergaming program in exercise among older adults. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023
Ning H, Li J, Chen X, Li M, Cao Z, Feng H.   +5 more
europepmc   +1 more source

[Application progress of innovative high resolution separation and analysis technology in food safety detection field]. [PDF]

Se Pu, 2023
Sun Y, Xie Y, Xu XL, Tan MQ, Zhang F.
europepmc   +1 more source

[Study of magnetic resonance imaging based on liver imaging reporting and data system for evaluating phosphatidylinositol proteoglycan-3 expression in hepatocellular carcinoma]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2022
Sun W, Zhao JT, Gao SS, Han J, Sheng RF, Zeng M.   +5 more
europepmc   +1 more source

[Clinical strategies to prevent falls]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021
Sun Q, Zhang Q, Peng X, Chen Y, Sun H.
europepmc   +1 more source

[A simulation study of photothermal effects in transcranial photobiomodulation]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu X, Xia J, Pan J, Chen S, Zhang S, Wang M, Dong S.   +6 more
europepmc   +1 more source

[Effects of exergame combined with elastic band resistance training on exercise self-efficacy and physical activity levels in older adults with cognitive frailty: A mixed-methods study]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Ning H, Chen Q, Chen X, Wu S, Zhang X, Li M, Feng H, Yu R.   +7 more
europepmc   +1 more source

[The comorbid mechanism of vestibular migraine and persistent postural-perceptual dizziness]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2022
Ma Y, Zhang D, Wang W, Zhang Z, Zhang H.
europepmc   +1 more source

[Prediction modeling for fall alertness impairment in Meniere's disease: development and clinical validation]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Li S, Wang W, Xu F.
europepmc   +1 more source

[Anxiety and depression in patients with dizziness and vertigo: analysis of related influencing factors]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Yang J, Zhu J, Liu X, Xu W, Zhou L, Xu H, Yuan D, Xiong B.   +7 more
europepmc   +1 more source