The Experts below are selected from a list of 16515 Experts worldwide ranked by ideXlab platform
Chuanwen Zhao - One of the best experts on this subject based on the ideXlab platform.
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conveying characteristics of pulverized coal in a top discharge blow tank system
Chemical Engineering & Technology, 2013Co-Authors: Xiaoping Chen, Daoyin Liu, J Y Cai, Chuanwen ZhaoAbstract:Based on the experiments of pulverized coal pneumatic conveying using nitrogen as carrier, the influences of riser inlet height above the gas distribution plate, riser diameter, pulverized coal external moisture content, and supplemental gas flow rate on the conveying characteristics such as pulverized coal mass flow rate and solid-gas ratio were investigated in a laboratory-scale experimental setup of a top-discharge blow tank under atmospheric pressure. There exists an optimal riser inlet height for a given top-discharge blow tank. The supplemental gas is one of the critical factors affecting the conveying stability and continuity. A model for material mass flow rate prediction with errors ranging from –25 % to +15 % is presented.
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effect of operating conditions and powder properties on pneumatic conveying characteristics of a top discharge blow tank
Chemical Engineering & Technology, 2012Co-Authors: Xiaoming Chen, Cai Liang, J Y Cai, Chuanwen ZhaoAbstract:The effects of fluidizing and pressurizing gas flow rates on pneumatic conveying characteristics such as powder mass flow rate, solid-gas ratio, and voidage in a top discharge blow tank pneumatic conveying system are evaluated. Pulverized coal and glass beads were used to investigate the effect of powder properties on conveying performance. The results indicate that as the fluidizing gas flow rate increases, the powder mass flow rate and the solid-gas ratio increase at first and then decline. As the pressurizing gas flow rate increases, the powder mass flow rate increases gradually, while the solid-gas ratio increases at first and then declines. Since the voidage values of all experiments are below 0.95, it can be inferred that the top discharge blow tank pneumatic conveying system is able to achieve dense-phase conveying.
Julia Mascherbauer - One of the best experts on this subject based on the ideXlab platform.
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flow reserve assessed by flow rate but not by stroke volume predicts mortality in low flow low gradient aortic stenosis
Journal of the American College of Cardiology, 2020Co-Authors: Mohamedsalah Annabi, Ezequiel Guzzetti, Bin Zhang, Jutta Berglerklein, Abdellaziz Dahou, Philipp E Bartko, Ian G Burwash, Stefan Orwat, Helmut Baumgartner, Julia MascherbauerAbstract:Flow reserve i.e. an increase in stroke volume >20% (Δ20%SV) during dobutamine stress echocardiography (DSE), has been used to predict mortality following surgical aortic valve replacement (AVR) in patients with classical low-flow, low-gradient aortic stenosis (CLF-AS). We hypothesized that mean
Sohrab Negargar - One of the best experts on this subject based on the ideXlab platform.
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hemodynamic parameters of low flow isoflurane and low flow sevoflurane anesthesia during controlled ventilation with laryngeal mask airway
Anesthesiology and Pain Medicine, 2014Co-Authors: Ali Peirovifar, Ata Mahmoodpoor, Masoud Parish, Samad E J Golzari, Haniye Molseqi, Sohrab NegargarAbstract:sevoflurane (n = 40) and low-flow isoflurane (n = 40). Hemodynamic parameters (heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) and Mean Arterial Pressure (MAP) were recorded at 5, 10, 15, 20, 25 and 30 minutes after the anesthesia induction. Results: The mean heart rate values were significantly less in the sevoflurane group (P value < 0.05) at 25 minutes after the surgery. The mean Blood Pressure in the isoflurane group was significantly higher compared with the sevoflurane group in 10, 20 and 30 minutes after the surgery (P values = 0.0131, 0.0373 and 0.0028, respectively). These differences were clinically unimportant because heart rate and mean blood pressure were on normal ranges. Conclusions: Seemingly, low-flow sevoflurane with LMA did not have any significant hemodynamic effect on clinical practice. Therefore, low-flow sevoflurane anesthesia with LMA might be considered in patients with short operations who need rapid recovery from anesthesia.
Mohamedsalah Annabi - One of the best experts on this subject based on the ideXlab platform.
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flow reserve assessed by flow rate but not by stroke volume predicts mortality in low flow low gradient aortic stenosis
Journal of the American College of Cardiology, 2020Co-Authors: Mohamedsalah Annabi, Ezequiel Guzzetti, Bin Zhang, Jutta Berglerklein, Abdellaziz Dahou, Philipp E Bartko, Ian G Burwash, Stefan Orwat, Helmut Baumgartner, Julia MascherbauerAbstract:Flow reserve i.e. an increase in stroke volume >20% (Δ20%SV) during dobutamine stress echocardiography (DSE), has been used to predict mortality following surgical aortic valve replacement (AVR) in patients with classical low-flow, low-gradient aortic stenosis (CLF-AS). We hypothesized that mean
Patricia A Pellikka - One of the best experts on this subject based on the ideXlab platform.
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development of paradoxical low flow low gradient severe aortic stenosis
Heart, 2015Co-Authors: Jordi S Dahl, Mackram F Eleid, Sorin V Pislaru, Christopher G Scott, Heidi M Connolly, Patricia A PellikkaAbstract:Objective Among patients with severe aortic stenosis (sAS) and preserved LVEF, those with low-flow, low-gradient sAS (LFLG-sAS) have an adverse prognosis. It has been proposed that LFLG-sAS represents an end-stage point of sAS, but longitudinal information has not been described. The aim was to determine whether LFLG-sAS represents an end-stage consequence of normal-flow, high-gradient sAS (NFHG-sAS) or a different entity. Methods From our transthoracic echocardiogram (TTE) database, we identified patients with sAS (aortic valve area 2 ) and preserved LVEF (≥50%), and from these, patients with LFLG-sAS (stroke volume index 2 and mean transvalvular gradient Results In 78 patients with LFLG-sAS, an HG stage preceded the index TTE in only 4 (5%). During the five years preceding the index TTE, patients with LFLG-sAS developed increasing relative wall thickness (0.42 to 0.49; p 2 ; p Conclusions LFLG-sAS is a distinct presentation of sAS preceded by a unique remodelling pathway and is uncommonly preceded by an HG stage.
