Results 1 to 10 of about 16,801 (213)

Response analysis of 3D braided two-stage gear system excited by different frequency signals

Advances in Mechanical Engineering, 2021
The knitting principle of 3D braided gear was studied, and the dynamic model of the two-stage gear system was established. The fourth-order Runge-Kutta method was used to numerically simulate the dynamic characteristics of common gear and 3D braided gear.
Weiliang Zhang, Xupeng Wang, Xiaomin Ji, Xinyao Tang, Fengfeng Liu, Shuwei Liu, Tengyuan Xue   +6 more
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Altered dynamic spontaneous neural activity in minimal hepatic encephalopathy

Frontiers in Neurology, 2022
Background and aims:Abnormal regional neural activity has been identified by the analysis of the static amplitude of low-frequency fluctuation (ALFF) in the setting of minimal hepatic encephalopathy (MHE). Brain activity is highly dynamic.
Jie-Ru Guo, Jia-Yan Shi, Qiu-Yi Dong, Yun-Bin Cao, Dan Li, Hua-Jun Chen   +5 more
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Abnormal cerebellar-prefrontal cortical pathways in obstructive sleep apnea with/without mild cognitive impairment

Frontiers in Neuroscience, 2022
Obstructive sleep apnea (OSA), a common respiratory sleep disorder, is often associated with mild cognitive impairment (MCI), which is a precursor stage to Alzheimer’s disease (AD).
Yongqiang Shu, Liting Chen, Kunyao Li, Haijun Li, Linghong Kong, Xiang Liu, Panmei Li, Wei Xie, Yaping Zeng, Dechang Peng   +9 more
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The Predictive Value of Dynamic Intrinsic Local Metrics in Transient Ischemic Attack

Frontiers in Aging Neuroscience, 2022
BackgroundTransient ischemic attack (TIA) is known as “small stroke.” However, the diagnosis of TIA is currently difficult due to the transient symptoms.
Huibin Ma, Huibin Ma, Guofeng Huang, Mengting Li, Yu Han, Yu Han, Jiawei Sun, Linlin Zhan, Qianqian Wang, Xize Jia, Xiujie Han, Huayun Li, Yulin Song, Yating Lv   +13 more
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Study on Dynamic Characteristics of Drill String Considering Rock-Breaking Process

Frontiers in Earth Science, 2021
Using various tools to obtain downhole data to reach a precise pore pressure model is an important means to predict overpressure. Most downhole tools are connected to the lower end of drill string and move with it.
Deyang Liang, Deyang Liang, Deyang Liang, Zhichuan Guan, Zhichuan Guan, Zhichuan Guan, Yuqiang Xu, Yuqiang Xu, Yuqiang Xu, Yongwang Liu, Yongwang Liu, Yongwang Liu   +11 more
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Changes in dynamic and static brain fluctuation distinguish minimal hepatic encephalopathy and cirrhosis patients and predict the severity of liver damage

Frontiers in Neuroscience, 2023
PurposeMinimal hepatic encephalopathy (MHE) is characterized by mild neuropsychological and neurophysiological alterations that are not detectable by routine clinical examination.
Jiang Ji, Jiang Ji, Yi-yang Liu, Guo-Wei Wu, Yan-Long Hu, Chang-Hua Liang, Xiao-dong Wang   +6 more
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Potential dynamic regional brain biomarkers for early discrimination of autism and language development delay in toddlers

Frontiers in Neuroscience, 2023
BackgroundThe early diagnosis of autism in children is particularly important. However, there is no obvious objective indices for the diagnosis of autism spectrum disorder (ASD), especially in toddlers aged 1–3 years with language development delay (LDD).
Shengjuan Wu, Zhi Wen, Wenzhong Yang, Chengcheng Jiang, Yurong Zhou, Zhiwei Zhao, Aiqin Zhou, Xinglian Liu, Xiaoyan Wang, Yue Wang, Hong Wang, Fuchun Lin   +11 more
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Disrupted dynamic amplitude of low-frequency fluctuations in patients with active thyroid-associated ophthalmopathy

Frontiers in Cell and Developmental Biology, 2023
Purpose: Thyroid-associated ophthalmopathy (TAO) is an autoimmune disease that affects the orbit and is the most prevalent extra-thyroidal complication of Graves’ disease.
Zhi Wen, Yan Kang, Yan Kang, Yu Zhang, Huaguang Yang, Yilin Zhao, Xin Huang, Baojun Xie   +7 more
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Numerical Analysis of Aeroacoustic Characteristics around a Cylinder under Constant Amplitude Oscillation

Energies, 2022
The present study numerically investigated a cylinder under oscillating motions at a low Reynolds number. The effects of two oscillation frequencies and amplitudes on the lift drag coefficient, near-field surface pressure fluctuation, and far-field noise
Peixun Yu, Jiakuan Xu, Heye Xiao, Junqiang Bai   +3 more
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Dynamic Changes of Amplitude of Low-Frequency Fluctuations in Patients With Diabetic Retinopathy

Frontiers in Neurology, 2021
Background: Growing evidence demonstrate that diabetic retinopathy (DR) patients have a high risk of cognitive decline and exhibit abnormal brain activity.
Xin Huang, Xin Huang, Zhi Wen, Chen-Xing Qi, Yan Tong, Yin Shen, Yin Shen   +6 more
doaj   +1 more source