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The method of characteristics used to solve a one-dimensional unsteady flow field of a simplified pipeline model were used to study the gas flow characteristics of a pipeline and the change in pressure in a container with an intermittent air source of a gas bearing test-bed, in particular, the pipeline flow velocity and pressure changes were analyzed. The flow area of the ball valve increased gradually...
Indoor air quality is important. It influences human productivity and health. Personal pollutant exposure can be measured using stationary or mobile sensor networks, but each of these approaches has drawbacks. Stationary sensor network accuracy suffers because it is difficult to place a sensor in every location people might visit. In mobile sensor networks, accuracy and drift resistance are generally...
The usual major approaches for current control in hard switched inverters are ramp comparison, hysteresis control. The former involve PI controller and suffer from poor transient performance, and the latter requires complex analog circuitry to give a constant switching frequency. This paper presents a simplified predictive current control algorithms and its application to a voltage source inverter...
In view of the fact that active power and reactive power have coupling relation, this paper deduces a novel and simple direct power control of three-phase pulse width-modulated rectifier with constant switching frequency using space-vector modulation(SVPWM), which the input active power and reactive power are decoupling controlled in d-q synchronous reference frame. The SVPWM modulation solves the...
The reliability of multi-processor systems-on-chip (MPSoCs) is affected by several inter-dependent system-level and physical effects. Accurate and fast reliability modeling is a primary challenge in the design and optimization of reliable MPSoCs. This paper presents a reliability modeling framework that integrates device-, component-, and system-level models. This framework contains modules for electromigration,...
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