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For the nonlinear state space model, it is difficult to obtain accurate closed-form solution from the recursive Bayesian framework. Therefore, in this case, through using the statistical linear regression, two algorithms with correlative noises are given based on the minimum mean-square-error estimation criterion in this paper. First, it proposes a statistical linear Kalman filter under the condition...
It is greatly significant to detect harmonic accurately and effectively for improving the quality of electric energy in the power system. Actually, much noise exists in signal besides harmonics, inter-harmonics, so the key is how to detect harmonic signals from the complex power system. According to the analysis of harmonic and noise, a new method is proposed in the paper to detect harmonic based...
The proposed constant on-time control DC-DC converter removes the need of conventional equivalent series resistor (ESR) compensation and simultaneously aims to eliminate equivalent series inductor (ESL) effect of the output capacitor. Since the on-time period is set simply by input and output voltages, the switching frequency in continuous conduction mode (CCM) operation is relatively constant over...
A novel MEMS inertial sensor with the actuators drived by Lorentz force for increasing the initial sensing capacitance is proposed. The model of the sensor system is established and the simulations are finished by using Matlab/Simulink. The mechanical noise, the displacement response, the fringe effect and the air damping under various initial capacitance distance are analyzed, respectively. The results...
For the single channel autoregressive moving average (ARMA) signals with multisensor, and with unknown model parameters and noise variances, the fused estimators of model parameters and noise variances can be obtained by the recursive instrumental variable (RIV) algorithm, the correlation method and the Gevers-Wouters algorithm with dead band. They have the consistency. The optimal distributed fusion...
Edge detection of bottle opening is a primary section to the machine vision based bottle opening detection system. This paper, taking advantage of the Balloon Snake, on the PET (Polyethylene Terephthalate) images sampled at rotating bottle-blowing machine producing pipelines, extracts the opening. It first uses the grayscale weighting average method to calculate the centroid as the initial position...
When making trip mode choice, travelers often take account of personal private cost such as travel time and money spent, while no considering external cost consisted of congestion effect or pollutions of air and noise. There is a big difference between the external cost of different travel modes in urban passenger transport, and the neglect of the external cost is to blame for mode imbalance in Chinese...
Data preprocessing algorithm including clutter suppression, threshold detector, ROI (region of interest) extraction and layer interface smoothing is presented, which is a part of automatic pavement subsurface rating system. The results based on simulation and measurement GPR (ground penetrating radar) data show that the presented algorithm is feasible.
Performance assessment and monitoring of MPC system is a brand-new field, and it is quality meaningful and practical. In this paper, we propose performance analysis theory and method applied to multivariate model predictive control system. Simulation and experiment prove that our research work is practical and have high significance.
We present a novel system for visual based contour tracking and apply it to track the movement of human's head. Currently available technology is used in the implementation to take care of low level video processing and acquisition. The implementation consists of two main parts. First, there is an error sensitive Gaussian particle filter. It estimates the posterior density of the shape being tracked...
Anti-virus experiment in vitro is a common way to screen and identify antiviral drugs. Most of the cell lines in anti-virus experiments are wall-adherent. The segmentation, recognition and counting this wall-adherent cells in micrograph successfully can cut down the time and cost of the experiment. Because of the wall-adherent cells characteristics, to segment this kind of image is much difficult...
De-noising by the traditional wavelet transform, the result is affected by the choosing of wavelet base. Because the wavelet base is fixed in the traditional wavelet transform, either the smoothness or singularity of the signal canpsilat be fitted quite well. To overcome the limitation, a new self-adaptive lifting scheme based on modulus maximum analysis is presented. Modulus maximum sequence of the...
The Block-FFT based multiuser detection algorithm is investigated, and the complexity and performance of the proposed 8-point Block-FFT multiuser detector is compared to that of Cholesky decomposition based multiuser detector. The results indicate that the performance of the proposed 8-point Block-FFT algorithm is comparable to that of Cholesky decomposition algorithm, and the complexity is lower...
In the permanent magnetic synchronous motor (PMSM) single rotator compressor system, the position coder is not used because of the limitation of working environment. Consequently, the load torque vibration of the compressor during each mechanical period is serious due to the restriction of location estimation accuracy, also causing big velocity fluctuation, high noise and low efficiency when the system...
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