Results 31 to 40 of about 29,731 (231)

Pressure Fluctuation Characteristics Analysis of Centrifugal Pump as Turbine in Its Start-Up Process

Actuators, 2022
In order to study pressure fluctuation characteristics of a centrifugal pump as turbine (PAT) in its start-up process, Fluent was used to do numerical simulation of the PAT start-up process.
Baodui Chai, Junhu Yang, Xiaohui Wang, Bingxiao Jiang   +3 more
doaj   +1 more source

Resting‐state amplitude of low‐frequency fluctuation is associated with suicidal ideation [PDF]

Depression and Anxiety, 2019
Identifying brain activity patterns that are associated with suicidal ideation (SI) may help to elucidate its pathogenesis and etiology. Suicide poses a significant public health problem, and SI is a risk factor for suicidal behavior.Forty-one unmedicated adult participants in a major depressive episode (MDE), 26 with SI on the Beck Scale for Suicidal ...
Martin J. Lan, Mina M. Rizk, Spiro P. Pantazatos, Harry Rubin‐Falcone, Jeffrey M. Miller, M. Elizabeth Sublette, Maria A. Oquendo, John G. Keilp, J. John Mann   +8 more
openaire   +2 more sources

Static and Dynamic Changes of Amplitude of Low-Frequency Fluctuations in Cervical Discogenic Pain [PDF]

Frontiers in Neuroscience, 2020
Cervical discogenic pain (CDP) is a clinically common pain syndrome caused by cervical disk degeneration. A large number of studies have reported that CDP results in brain functional impairments. However, the detailed dynamic brain functional abnormalities in CDP are still unclear.
Mingyue Ma, Hong Zhang, Run Liu, Hongsheng Liu, Xiangchun Yang, Xiaohui Yin, Song Chen, Xiaoping Wu   +7 more
openaire   +3 more sources

Altered Brain Fraction Amplitude of Low Frequency Fluctuation at Resting State in Patients With Early Left and Right Bell’s Palsy: Do They Have Differences?

Frontiers in Neuroscience, 2018
Purpose: Bell’s palsy refers to acute idiopathic unilateral facial nerve palsy. It is a common disorder of the main motor pathway to the facial muscles.
Xiaowei Han, Xiaowei Han, Haimei Li, Xiaochun Wang, Yijiang Zhu, Tianbin Song, Lei Du, Shilong Sun, Runcai Guo, Jing Liu, Sumin Shi, Chao Fu, Wenwen Gao, Lu Zhang, Guolin Ma   +14 more
doaj   +1 more source

Numerical Study of Unsteady Pressure Fluctuation at Impeller Outlet of a Centrifugal Pump

Science and Technology of Nuclear Installations, 2022
Intense fluid-dynamic interaction at the impeller outlet strongly affects the unsteady flow and pressure stability within the centrifugal pump. In order to have a better understanding of the pressure fluctuation of centrifugal pumps, a numerical ...
Xiaojie Ma, Lulu Zheng, Jinglei Qu, Mengmeng Wang   +3 more
doaj   +1 more source

Frequency-dependent changes in the amplitude of low-frequency fluctuations in internet gaming disorder [PDF]

Frontiers in Psychology, 2015
Los estudios de neuroimagen han revelado que las actividades cerebrales funcionales relacionadas con las tareas se ven afectadas en los sujetos con trastorno por juego en Internet (IgD). Sin embargo, se sabe poco sobre las alternancias en las actividades cerebrales espontáneas sobre ellos. Estudios recientes han propuesto que las actividades cerebrales
Xiao Lin, Xize Jia, Yu‐Feng Zang, Guangheng Dong   +3 more
openaire   +3 more sources

Dynamic changes in fractional amplitude of low-frequency fluctuations in patients with chronic insomnia

Frontiers in Neuroscience, 2022
BackgroundPrevious neuroimaging studies have mostly focused on changes in static functional connectivity in patients with chronic insomnia (CI). Features of dynamic brain activity in patients with CI have rarely been described in detail. The present study investigated changes in dynamic intrinsic brain activity in patients with CI by dynamic fractional
Wei Chen, Hui Wang, Hui Wang, Tianze Sun, Qi Wu, Wenxuan Han, Qian Li, Yong Liu, Yuanping Zhou, Xiuyong He   +9 more
openaire   +3 more sources

Scale-free amplitude modulation of low-frequency fluctuations in episodic migraine

Pain, 2019
Abstract Arrhythmic fluctuations in neural activity occur at many levels of the nervous system. Such activity does not have a characteristic temporal periodicity but can exhibit statistical similarities, most commonly power-law scaling behavior, which is indicative of scale-free dynamics.
Duncan J, Hodkinson, Danielle, Lee, Lino, Becerra, David, Borsook   +3 more
openaire   +3 more sources

Altered trigeminothalamic spontaneous low-frequency oscillations in migraine without aura: a resting-state fMRI study

BMC Neurology, 2021
Background Recent resting-state fMRI studies demonstrated functional dysconnectivity within the central pain matrix in migraineurs. This study aimed to investigate the spatial distribution and amplitude of low-frequency oscillations (LFOs) using ...
Ye Eun Kim, Min Kyung Kim, Sang-il Suh, Ji Hyun Kim   +3 more
doaj   +1 more source

Regional brain dysfunction in insomnia after ischemic stroke: A resting-state fMRI study

Frontiers in Neurology, 2022
ObjectiveThis study aimed to explore the abnormality of local brain function in patients with post-stroke insomnia (PSI) based on fMRI and explore the possible neuropathological mechanisms of insomnia in patients with PSI in combination with the ...
Hongzhuo Wang, Yunxuan Huang, Mingrui Li, Han Yang, Jie An, Xi Leng, Danghan Xu, Shijun Qiu   +7 more
doaj   +1 more source