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Lumped parameter thermal network (LPTN) is widely used for calculation the temperature rise in electrical machines. In LPTN models, heat transfer process in the motor are abstracted form a thermal point of view and can be described via equivalent circuit diagrams, the thermal capacity is modeled by means of a capacitor, as used for describing electric circuits. Compared to the numerical method such...
The diagnosis of heart disease in most cases depends on a complex combination of clinical and pathological data. Because of this complexity, there exists a significant amount of interest among clinical professionals and researchers regarding the efficient and accurate prediction of heart disease. In this paper, we develop a heart disease predict system that can assist medical professionals in predicting...
There is little literature to introduce the approaches for the feature selection, which plays an important role in the customer churn prediction. In addition, due to the imbalanced data classification problem occurring, most of the traditional approaches ineffectively select the important features for the churn prediction. This paper proposes a new filter feature selection approach for customer churn...
Firstly realizable k-epsilon turbulent model (RKE) and Reynolds stress turbulent model (RSM) were tested against a swirl-cup flow field and the prediction results were compared with the experimental data. Generally, the max error of RKE model and RSM model is about 5% and 3% separately. Thus the RKE model was used in the simulation of a single swirl-cup gas turbine combustor (GTC) and a multi-injection...
The capabilities of the Dynamic Thermal Electron Quantum Medium FDTD (DTEQM-FDTD) model in simulating semiconductor media and devices are illustrated. Both transient and steady-state carrier dynamics, along with associated physical phenomena are obtained. Using the same computational model, the operational dynamics of a Fabry-Perot laser cavity are further illustrated.
The dynamic thermal electron quantum medium FDTD (DTEQM-FDTD) model is used to demonstrate ultrafast carrier dynamics in saturable gain and absorber media. The same model is then used to simulate a passive mode locked laser.
It is necessary to evaluate the operational capability of the weapon equipment based on combat-simulation, however, the simulation data is so isomerous that it is difficult to make evaluation model. Pointing to this problem, a comprehensive method based on the TOPSIS, AHP and SIMULATION method (T-A-S) is built to evaluate the operational capability of weapon equipment. An example about the operational...
In this paper, the efficiency of extracting light energy from the minor surface arc of the elliptical microcavity laser is investigated. The dynamic thermal equilibrium quantum medium FDTD (DTEQM-FDTD) model is used to simulate the field distribution and amplitude in the microcavity laser under electrical pumping. Light energy is extracted from the minor surface arc of the elliptical microcavity to...
Two recursive dynamic models, based on the Newton-Euler formulation, are proposed to model the dynamics of manipulators with link flexibility. In both models, the displacement and rotation due to the link flexibility are assumed to be measurable. For a small link deformation, a first-order lumped mass/spring approximation model is proposed, in which the parameters of each link are lumped to its joint...
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