Results 101 to 110 of about 91,606 (298)

Experimental study on the flow structure and sound generation between the blades of multi-blade fan

open access: yesNihon Kikai Gakkai ronbunshu, 2017
The relationship between flow structure and generation of aerodynamic sound from a multi-blade fan is experimentally investigated with enlarged two-dimensional blade models. Two blade models with different shapes are used.
Koji IWANO   +8 more
doaj   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine [PDF]

open access: yes, 2018
The pressure fluctuation has multiple influence on the steady operation of Francis turbine, and the impact degree varies with the operation condition.
Qijuan Chen   +4 more
core   +1 more source

Investigation of the Pressure Fluctuation of Piston Chambers with Variable Slot Geometry

open access: yes, 2023
High-pressure fluctuation and flow ripple may cause unexpected vibration and noise when the piston pump works under severe conditions, and eventually lead to hydraulic transmission failure.
Hongkang Dong   +2 more
core   +1 more source

Study on Pressure Fluctuation Characteristics of Hydraulic Pulsed Jet

open access: yesShiyou jixie, 2016
By producing instantaneous negative pressure and pulse shock at the bottomhole,the pulsed jet could reduce the pressure holding effect on the cuttings and improve the efficiency of rock breaking and cutting removing.On the basis of the established ...
Zhang Yi   +3 more
doaj  

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

open access: yesFEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee   +7 more
wiley   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

open access: yesFEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar   +4 more
wiley   +1 more source

NUMERICAL SIMULATION OF PRESSURE FLUCTUATION IN DRAFT TUBE OF LARGE FRANCIS TURBINE

open access: yes, 2020
The pressure fluctuation caused by swirling flow in draft tube is one of the main reasons of vibration in hydraulic turbine. It directly affects the steady operation of hydraulic turbine unit.
Tongan Monitoring   +5 more
core  

Prediction of Gas–Liquid Two‐Phase Flow Pressure Wave in the Wellbore During the Re‐Production of Deep Gas Wells

open access: yesEnergy Science & Engineering
The pressure of the tube at the wellhead is abruptly released during the opening of a high‐production gas well, causing pressure fluctuation and subjecting the tubing to extra stress.
Yushan Zheng   +8 more
doaj   +1 more source

Experimental study on the influence of air injection on unsteady cloud cavitating flow dynamics

open access: yesAdvances in Mechanical Engineering, 2016
The main purpose of this study was to investigate the influence of air-injection technique on unsteady cloud cavitating flow dynamics. High-speed camera and pressure measurement system are used to record ventilated cavitation images and wall-pressure ...
Naimin Zhang   +3 more
doaj   +1 more source

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