Results 11 to 20 of about 271,158 (273)

Research on the ejection performance of an ejector with low pressure and back pressure

Scientific Reports
This study investigates the influence of back pressure on the mass ejection coefficient (u) of low-pressure methane-air ejectors through a combined approach of one-dimensional mathematical modeling and computational fluid dynamics (CFD) simulations.
Cong Chen, Haijing Liu, Pengfei Duan
doaj   +2 more sources

Effect of Back Pressure on Performances and Key Geometries of the Second Stage in a Highly Coupled Two-Stage Ejector

Entropy, 2022
In this paper, for a highly coupled two-stage ejector-based cooling cycle, the optimization of primary nozzle length and angle of the second-stage ejector under varied primary nozzle diameters of the second stage was conducted first. Next, the evaluation
Jia Yan, Yuetong Shu, Chen Wang
doaj   +2 more sources

Immediate effects of a five minutes back massage on patients’ physiological parameters in critical care unit

مجله دانشگاه علوم پزشکی گرگان, 2001
Recent publications have questioned the efficacy of massage. It is acknowledged that critical care environment are stressful for patients in term of invasive medical, and nursing procedures.
H.Rahmani . Anaraki (M.Sc), A.A.Abdollahi (M.Sc), H.Nasiri (M.Sc), M.A.Vakili(M.Sc)   +3 more
doaj   +1 more source

Numerical Prediction of Refrigerant-Oil Two-Phase Flow from The Scroll Compressor Discharge to the Suction Side via the Back Pressure Chamber [PDF]

, 2023
Оil lubricates the contact of the orbiting and stationary scroll in the refrigerant scroll compressor, while the sealing between the scrolls is achieved by the refrigerant vapour pressure in the sealed back pressure chamber.
Stevanović, Vladimir, Milan M. Petrovic, Petrović, Milan M., Ćućuz, Stojan, Stojan Cucuz, Ilić, Milica, Milivojević, Sanja, Sanja Milivojevic, Vladimir D. Stevanovic, Milica Ilic   +9 more
core   +1 more source

A comparative analysis of moving average filter and Kalman filter for large diesel engine test cell back-pressure control [PDF]

, 2023
Diesel engine combustion releases many harmful components, thus there are continuous efforts into improving the efficiency of these engines and reducing the harmful gasses and particulates to meet the emission authorities targets. To develop and sell new
Colin McGurk, Luo, Qiang, Ahmed, H.,, Ahmed, Hafiz, Mathias Foo, Qian Lu, Lu, Q.,, Laila, Dina Shona,, Foo, Mathias, Dina Shona Laila, Pike, Andrew, Lu, Qian, Pike, A.,, McGurk, Colin, Andrew Pike, Laila, Dina Shona, Pike, Andrew Charles, Foo, M.,, Lu, Qian; id_orcid, McGurk, C.,, Hafiz Ahmed   +20 more
core   +1 more source

Association between long-term static postures exposure and musculoskeletal disorders among university employees: A viewpoint of inflammatory pathways

Frontiers in Public Health, 2022
BackgroundMusculoskeletal disorders (MSDs) are critical occupational and social problems. With the improvement of production mechanization and automation, and the widespread application of computers, more occupations are exposed to static postures and ...
Yidan Dong, Ping Jiang, Xu Jin, Nanyu Jiang, Wenchu Huang, Yu Peng, Yuhong Shen, Lihua He, Mikael Forsman, Mikael Forsman, Liyun Yang, Liyun Yang   +11 more
doaj   +1 more source

Critical pressure asymmetry in the enclosed fluid diode [PDF]

, 2020
Joint physically and chemically pattered surfaces can provide efficient and passive manipulation of fluid flow. The ability of many of these surfaces to allow only unidirectional flow means they are often termed fluid diodes. Synthetic analogues of these
Panter, Jack R., Kusumaatmaja, Halim, Gizaw, Yonas   +2 more
core   +1 more source

Numerical study on the influence of plugging rate on the performance of adjustable steam ejector [PDF]

International Journal of Fluid Engineering
During the operation of thermal power plant systems, severe challenges to the quality and safety of the heat supply arise owing to the effects of peak regulation.
Jianxiang Gao, Zepeng Yuan, Yuyan Hou, Weixiong Chen   +3 more
doaj   +1 more source

Back to basics: biophysical methods in tissue viability research [PDF]

, 2013
The continued growth of research in the areas of tissue viability and wound care has led to the development of an equally diverse range of techniques to assess wounds and provide some quantitative measure of healing. These range from highly sophisticated
Voegeli, David, Worsley, Peter, D. Voegeli, P. worsley   +3 more
core   +1 more source

Construction and Application of “Active Prediction-Passive Warning” Joint Impact Ground Pressure Resilience Prevention System: Take the Kuan Gou Coal Mine as an Example

Lithosphere, 2023
With the increasing depth and intensity of coal mining, the impact on ground pressure has become one of the main disasters facing mining, seriously threatening mine safety.
Jiantao Cao, Shuai Zhang, Huicong Xu, Wei Li, Jindong Wang   +4 more
doaj   +1 more source