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Urea-Selective catalytic reduction(Urea-SCR) method is an effective way to reduce the NOx emissions for diesel engine, and the closed-loop state feedback control strategy is widely studied by many researchers. In order to estimate the un-measurement state, this paper uses extended Kalman filter(EKF) to design a state observer for Urea-SCR system. Firstly, a two-cell Urea-SCR model is given. Secondly...
Reactive power is an essential part of the power compared with active power. It is used to establish and sustain the magnetic field present in electrical equipment possessive of coils, such as transformers and electric machines. The reactive power consumption in large distribution networks can result in a huge reactive power flow, rising line current and a sub-nominal voltage. To avoid these negative...
This paper presents an accelerated life testing method to solve the problem of in-pipe robot reliability in quantitative analysis. By established inverse power law probability density function model based on Weibull distribution, the results of accelerated life testing can be used to extrapolate reliability features of in-pipe robot under the normal condition, especially for single or rare prototype...
The commercial computer fluid dynamics software package FLUENT was used to simulate the flow field of the new toilet system. The mesh model of the flow field was built with the GAMBIT. With the numerical simulation of the flow field on air intakes and flushing system, the pressure and velocity vector cloud diagram have been given. The information would be very useful in experimental investigation...
Based on derivation of fluid inertia velocity distribution, the paper proposes an analytical model for pressure distribution of squeeze film damper (SFD) in long bearing assumption under impact loading. Compared with numerical simulation and test results, the model is reasonable. The model analysis results reflect the reversion behavior about SFD radial force. Therefore, a design rule of synchro-response...
According to the character of the typical serial information leakage and the feature in the information leakage problem that multiple points (zone) converge and couple toward one point (zone), several key concepts, such as the emission zone, transmission zone and receiving zone, are defined in this paper. Based on the idea of electromagnetic topology, a completely new construction method of system...
In this paper, the video information camouflage processing method based on the pulse amplitude modulation was studied aim at the electromagnetic characteristic of computer video information. Camouflage information modulation function was proposed, the matching vision relation between character information and background color was determined, and the image fusion processing algorithm of camouflage...
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