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Hall-effect sensors are wildly utilized to estimate rotor angle of permanent magnet synchronous motor (PMSM) in low-cost situations using vector control. A variety of estimation algorithms have been proposed to improve the precision of the estimated rotor position, while few literatures so far dedicate in dealing with Hall-effect sensor faults. In this paper, the types of sensor faults are divided...
Spectral unmixing is a useful technique in fluorescence imaging for reducing the effects of background fluorescence (BF), also called autofluorescence (AF), and separating multiple fluorescence probes. But it is complicated by the significant overlap of the fluorophore emission spectra, and the strong BF signal is often highly mixed with all multi-target fluorescences and can have a confusing effect...
To ensure that the project risk assessment is scientific, firstly, a risk estimate matrix based on matrix method is established according to the trait of project risk assessment. Then using concentrated numeric statistic method and interval fuzzy processing method, the estimated data is analyzed. Finally, the method is applied to a software project risk evaluation, the result fully demonstrates its...
The Chinese welfare lottery "double color ball" is a lottery giant in China. In 2011, sales volume is about ¥300 million for each drawing, the average monthly sales amount is more than ¥3 billion, the highest jackpot is over ¥800 million, and there are hundreds of millions of participants with a broad social impact. This, people are concerned aboutwhether thedrawing of "double color...
In this paper, we present the Gauss–Newton method as a unified approach to estimating noise parameters of the prevalent nonlinear compensation models, such as vector Taylor series (VTS), data-driven parallel model combination (DPMC), and unscented transform (UT), for noise-robust speech recognition. While iterative estimation of noise means in a generalized EM framework has been widely known, we demonstrate...
Xunlei [1] is a new P2P content distribution system which is popular in China. It composes traditional HTTP/FTP downloading and P2P content distribution features which attract many people including researchers. Xunlei's network is Bit Torrent-like and the measurement is more difficult than other P2P networks [2]. There are many constrains on Xunlei tracker, so we can not obtain information from tracker...
Facial landmark detection is an essential module in many face related applications and it often appears as the most time consuming part in face processing pipeline. This paper proposes a fast and effective method for facial landmark detection using Haar cascade classifiers and a simple 3D head model, which not only detects the position of landmark points but also gives an estimation of head pose such...
In this paper, we present the Gauss-Newton method as a unified approach to optimizing non-linear noise compensation models, such as vector Taylor series (VTS), data-driven parallel model combination (DPMC), and unscented transform (UT). We demonstrate that the commonly used approaches that iteratively approximate the noise parameters in an EM framework are variants of the Gauss-Newton method. Through...
In this paper, we propose a novel noise variance estimation method using the fixed point method for the VTS-based robust speech recognition. Noise parameters are re-estimated over a given utterance using an EM algorithm. The derivative of the auxiliary function with respect to the noise variance is resolved, and the fixed point algorithm estimates the noise variance by recursively approximating the...
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