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The probability hypothesis density (PHD) filter handles the measurements periodically, once a scan period. Since measurements have to be gathered for a scan period before the PHD filter can perform a recursion, significant delay may arise if the scan period is long. To reduce this delay, we proposed sequential PHD filter. A Gaussian mixture implementation of the sequential PHD filter for nonlinear...
In the view of the unfitness to the actual maneuver of targets that a fixed maneuvering frequency used in the current statistical model. Firstly, predicted measurements of special maneuvering frequency are clustered with the aid of maximum entropy fuzzy clustering. Then, the estimated means and covariance of the state are mixed by utilizing the fuzzy membership degree of the predicted measurements...
Pulsed eddy current (PEC) detection technology has gained attention in the research and development of the non-destructive testing (NDT). In contrast to the conventional eddy current testing method, the PEC detection technology uses pulsed excitation that is characterized by the richness of frequency. So when the inner corrosion of the low-carbon steel pipeline is detected by the PEC technology, the...
With the speed of electrified railway improving, the getting worse arch arc, has become one of constraining bottleneck in the development of China high-speed railway. This paper has discussed the hazards of arc to the contact wire, pantograph skateboards, communication signals, radio signals and power quality. From the aspects of arc model, arc energy, arc erosion and carrier friction, summarizes...
For rapid system-level modeling and simulation of MEMS, a method with Modelica for modeling and simulation of electrostatic comb-drive actuators is proposed. The non-causal and object-oriented modeling methods are analyzed. Then a non-causal object-oriented model of the actuator with Modelica is established based on original equations instead of assignment statements. The results of numerical simulation...
A novel color video optical flow estimation approach based on vector homogeneity analysis is proposed, in which the optical flow equation (OPE) is established by the color constant model (CCM) rather than the brightness constant model (BCM) which is used in ordinary optical flow estimation approaches. In order to solve concisely, the CCM-based OPE is projected onto the homogeneity direction of a local...
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