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Coal rock stability evaluation has been proposed to predict the mine catastrophic hazards. Acoustic Emission (AE) as a useful nondestructive condition monitoring technique provides earlier fracture detection in coal rock. Due to various external and internal variables changings, AE events accurately characterized fracturing processes is still a problem. For this reasons, this paper proposes a new...
Control mode and control parameters of the excitation system play an important role in the security and stability operation of generator and even power grid. It is shown in some generator oscillation accidents without system fault in industrial enterprises that there have exciter stability problems in industrial power plants. In this paper, an extended Heffron-Philips model considering Var and power...
In process mining, after we get the model from the log by using mining algorithm, the coexistence of process model with event log brings such a problem: whether the model and the event log are mutually consistent. The conformance checking means that by comparing the model getting by the model discovery with the actual process' action or the event log, we can find that whether the model is factual...
It is very important to keep the measurement system stability for a good quality control process, and the control chart is a necessary tool for measurement system analysis. The ability to detect small shifts in process response of the three different control charts were compared in this paper: the traditional shewhart control chart, cumulative sum (CUSUM) and exponentially weighted moving average...
This paper presents the design of an ultra low noise amplifier (LNA) from 6 GHz to 6.5 GHz, which is used in higher frequency band mobile communication systems. The circuit design, simulations and optimizations were performed using the Advanced Design System. The testing results indicate that the low noise amplifier has good performance: the gain is 24 dB with a 0.3 dB ripple, and the range of noise...
This paper is concerned with stability analysis and stabilization of Itô stochastic systems with Markovian switching. A couple of eigenvalue sets for some positive operator associated with the stochastic system under study are defined to characterize its stability in the mean square sense. Properties for these eigenvalue sets are established based on which we show that the spectral abscissa of these...
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