Results 61 to 70 of about 7,667 (113)

一例儿童Leigh综合征

open access: yesZhongguo shiyan zhenduanxue, 2019
Leigh综合征(Leigh Syndrome,LS)又称亚急性坏死性脑脊髓病(SNEM),是一种罕见的、由遗传基因缺陷导致的以脑和肌肉受累为主的线粒体疾病。其特征性表现为肌无力、慢性进行性眼外肌麻痹、智能障碍、共济失调、发作性肌阵挛、视神经病变等。典型影像学MRI表现为基底节区及脑干对称性异常信号。据目前报道,约48%至80%的患者在1岁以内发病[1,2],幼儿期发病者少见。另外,近年国外研究显示,线粒体疾病患者中仅约7-10%可检测出线粒体DNA(mitochondrial DNA,mtDNA)变异[
赵宏霞   +4 more
doaj  

基于稀疏引导IEWT‑MOMEDA的行星齿轮箱微弱故障检测

open access: yesZhendong Ceshi yu Zhenduan
行星齿轮箱出现早期故障时,由于工业环境的背景噪声干扰和故障冲击在复杂传递路径中衰减,其微弱故障特征难以有效提取和识别。针对此问题,提出了稀疏引导的改进经验小波变换(improved empirical wavelet transform,简称IEWT)结合多点最优最小熵解卷积(multipoint optimal minimum entropy deconvolution adjusted,简称MOMEDA)的微弱故障特征提取方法。首先,提出了一种新的故障综合指标(fault composite ...
doaj   +1 more source

[Detection of neurofibroma combining radiomics and ensemble learning]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu Y   +6 more
europepmc   +1 more source

[Indicative effect of indocyanine green-near-infrared fluorescence imaging in the thickness of necrotic dermal tissue in porcine burn wounds]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Zhang YS   +6 more
europepmc   +1 more source

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