Description:

Dr. Qi completed a second Ph.D. on Electrical and Computer Engineering while holding the faculty position at the Speech and Hearing Sciences Department of University of Arizona. He published several articles on signal processing and pattern recognition as part of his Ph.D. work. After joining Qualcomm, he continued to publish works on signal processing in collaboration with Prof. Jack Xin of UC Irvine. Early publications on Speech and Hearing Sciences are not listed here; but available upon request.

Publications :

• J. Liu, J. Xin, Y. Qi, A Time Domain Blind Decorrelation Method of Convolutive Mixtures Based on an IIR Model. Computational Mathematics, Vol 28, No 3, pp 371-385, 2010
• J. Liu, J. Xin, Y. Qi, A Soft-Constrained Dynamic Iterative Method of Blind Source Separation. Multiscale Model Simulation SIAM, Vol 7, No 4, pp 1795-1810, 2009.
• J. Liu, J. Xin, Y. Qi and F. Zeng, A Time Domain Algorithm for Blind Separation of Convolutive Mixtures Constrained Minization of Convolutions. Comm. in Math. Sci. Vol 7, No 1, pp 109-128, 2009.
• C. Mackersie, Y. Qi, A. Boothroyd, and N. Conrad Evaluation of cell phone technology with digital hearing aid features: Effects of encoding and individualized amplification. Journal of the American Academy of Audiology. 20: 109-118, 2009.
• J. Liu, J. Xin and Y. Qi, A Dynamic Algorithm for Blind Separation of Convolutive Sound Mixtures, Neurocomputing, vol 72, pp 521-532, 2008.
• J. Xin and Y. Qi, A Many to One Discrete Auditory Transform, arxiv.org, NA/0603174, 2006.
• Y. Kim, J. Xin, and Y. Qi, A Study of Hearing Aid Gain Functions Based on a Nonlinear Nonlocal Feedforward Cochlea Model, Hearing Research, Volume 215, Issues 1-2, pp 84-96, 2006.
• M.D. LaMar, J. Xin, and Y. Qi, Signal Processing of Acoustic Signals in the Time Domain with an Active Nonlinear Nonlocal Cochlear Model, Signal Processing, 86, pp 360-374, 2006.
• J. Xin and Y. Qi, An Orthogonal Discrete Auditory Transform, Communications in Math Sciences, Vol. 3, No. 2, pp 251-259, 2005.
• J. Xin and Y. Qi, An Invertible Discrete Auditory Transform, Communications in Math Sciences, Vol. 3, No. 1, pp 47-56, 2005.
• J. Xin and Y. Qi, Global well-posedness and multi-tone solutions of a class of nonlinear nonlocal cochlear models in hearing, Nonlinearity, Vol. 17, No. 2, pp 711-728, 2004.
• J. Xin and Y. Qi, A PDE based two level model of the masking property of the human ear, Communications in Math Sciences, Vol. 1, No. 4, pp. 833-840, 2003.
• J. Xin, Y. Qi, and L. Deng, Time Domain Computation of a Nonlinear Nonlocal Cochlear Model with Applications to Multitone Interaction in Hearing, Communications in Math Sciences, Vol. 1, No. 2, pp. 211-227, 2003.
• M.D. LarMar, Y. Qi, and J. Xin, Modeling Vocal Fold Motion with a Hydrodynamic Semi-Continuum Model, Journal of the Acoustical Society of America, Vol. 114, No. 1, pp 455-464, 2003.
  
• Y. Qi, and J. Xin, A Perception and PDE Based Nonlinear Transformation for Processing Spoken Words, Physica D 149,143-160, 2001.
  
  
• N. Bi, H. Garudadri, C. Chang, A. DeJaco, Y. Qi, N. Malayath, W. Huang A robust speech recognition system embedded in CDMA cellular phone chipsets. ICASSP: 3804-3807, 2002.
• Bi, N and Qi, Y. Application of speech conversion to alaryngeal speech enhancement. IEEE Trans. on Speech and Audio Processing, 5, 97-105 1997.
• Qi, Y. and Hunt, B. A multiresolution approach to computer verification of handwritten signatures. IEEE Trans. on Image Processing, Vol. 4, No. 6, 870-874, 1995.
• Qi, Y. and Hunt, B., Signature verification using global and grid features, Pattern Recognition, 27, 1621-1629, 1994.

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