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According to the structure feature of the radial distribution network, a new method of earth fault detection based on wide-area measurement information is proposed in this paper. This method primarily uses the information matrix of the radial distribution network and wide-area information for fault diagnosis. The algorithm has a clearly physical concept and can identify the earth fault at the end...
Interaction process of condensation shock and aerodynamic shock in superheated steam flow and nucleation flow with different exit Mach number was numerically studied. The model was implemented within a full N-S viscous flow solution procedure, and the process of condensation was calculated by the quadrature method of moments. Numerical schlieren photography was performed to show the shock wave distribution...
Many effective automatic surface simplification algorithms have been developed in order to produce approximations from a complex polygonal model. However, previous algorithms often have difficulty identifying and preserving important geometric features such as high-curvature regions when the model is simplified to a very low level of detail. In this paper, we define a new feature constraint quadric...
Hundreds of thousands of lives were lost in the natural disasters such as geological earthquakes, floods, landslides and mud-rock flow in every year. Nowadays, with the rapid development in airborne LiDAR techniques, extraction of the multi-scale topographical features from high-resolution topographic data acquired via airborne LiDAR would lead to fundamentally new understandings of earth essential...
As well-known, the fluid flow in inner and outer layers of floating-ring bearings (FRB) can be considered as the flow of in the thin layer. In this paper, for the viscous flow of the oil film in the inner and outer layers of FRB, the approximate series solutions of the Navier-Stokes equations in tensor form are obtained by using lubrication theory for the flow in thin layers. The result reveals that...
The mechanism of a floating ring in the floating ring bearing system is investigated. Based on Hirs' bulk flow theory, Moody's frication factor equation and generalized incompressible Reynolds Equation, considering the elastic deformation and the whirling motion of the floating ring, the model and the governing equation of the floating ring bearing under the turbulence state were set up. The result...
A new method was put forward to measure the errors of bevel gear and corresponding measure device was invented. The measure gear was made by pasting the metal silks on the teeth. The advantage of the device was the error (including tangential composite error, tangential tooth-to-tooth composite error, radial composite error, total cumulative pitch error and total alignment error et al) can be measured...
Inverted pendulum is one of the most important plants to be researched to investigate the validity of various control strategies, it's a highly nonlinear, unstable system. In this paper, the friction force and viscous moment are considered in the modeling of the plant, the sliding mode control method is applied to the design of the control system of inverted pendulum, both traditional sliding mode...
A method for controlling homogeneous nucleation and reducing degree of flow separation in high-speed transonic wet steam flow is presented. The spontaneous nucleation flow in a turbine cascade was numerically studied. The model was implemented within a full Navier-Stokes viscous flow solution procedure, and the process of condensation was calculated by the quadrature method of moments which show good...
In this paper, we present an improved algorithm for super-resolution image restoration which used L-Curve regularization to Maximum A-Posteriori method. Super-Resolution as the second-generation problem of image restoration is also an ill-posed question because of an insufficient number of LR images and ill-conditioned blur operators. Procedures adopted to stabilize the inversion of ill-posed problem...
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