نتایج جستجو برای: gas hold
تعداد نتایج: 298696 فیلتر نتایج به سال:
Introduction: The high solubility of xenon in biological tissues, combined with an exquisite sensitivity to its environment that results in an enormous range of chemical shifts upon solution, make hyperpolarized Xe129 particularly attractive for exploring characteristics of lung function, such as gas exchange, that are not accessible by using hyperpolarized He3. With improvements in gas-polariz...
The paper provides results for the application of boundary feedback control with Zero-Order-Hold (ZOH) to 1-D linear parabolic systems on bounded domains. It is shown that the continuous-time boundary feedback applied in a sample-and-hold fashion guarantees closed-loop exponential stability, provided that the sampling period is sufficiently small. Two different continuous-time feedback designs ...
Nowadays, extensive research has been conducted for gas turbine engines control due to growing importance of gas turbine engines for different industries and the need to design a suitable control system for a gas turbine as the heart of the industry. In order to design gas turbine control system, various control variables can be used, but in the meantime, fuel flow inserting into combustion cha...
ventilation defects during the breath-hold (a, white arrows) in a volunteer with asthma. During the forced exhalation, residual signal due to gas trapping is evident in MRI (b, arrows) and air trapping is confirmed in MDCT during breath-hold at FRC (d, arrows). Figure 1. Subset of MIP time-frame images during dynamic ventilation showing intense signal enhancement during inspiration (arrow, 6 s)...
Effect of interparticle force on the hydrodynamics of gas-solid fluidized beds was investigated using the combined method of computational fluid dynamics and discrete element method (CFD-DEM). The cohesive force between particles was considered to follow the van der Waals equation form. The model was validated by experimental results from literature in terms of bed voidage distribution and Eule...
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