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 RESEARCH AREAS of INTEREST:  

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Nonparametric mixed-effects modeling for longitudinal data

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Nonparametric techniques in medical applications

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Functional data analysis and longitudinal data analysis

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Nonparametric regression and density estimation

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Uniform design and computer design

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Applications of number theoretic methods in statistics

 

PUBLICATIONS: 

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Statistical inferences for functional data (2007) (with J. Chen). To appear in  Ann. Statist.

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Modeling HIV dynamics using unified mixed-effects model (2007) (with H. Wu). Manuscript.

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A note on the bounded normal mean problem (2006) (with J. Fan). Advances in Statistical Modeling and Inference: Essays in honour of Kjell A. Doksum. Vijay Nair (Eds.)  pp. 635-647.  World Scientitific, London.

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Chen, J. W., Zhang, J. -T. and Wu, H. (2005). Discretization approach and nonparametric modeling for long-term HIV dynamic model. Computational Science and Its Applications. O. Gervasi et al. (Eds.). pp. 519-527. Spring-Verlag, Berlin, 2005.

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Zhang, J. -T. (2005). Thresholding regression splines with applications. Contemporary Multivariate Analysis and Experimental Designs. J. Fan and Gang Li (Eds.). pp. Spring-Verlag, New York.

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Approximate and Asymptotic distributions of  chi-squared -type  mixtures with applications (2005).  J. Amer. Statist. Assoc., 100, 273-285.

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A simple and efficient monotone smoother using smoothing splines (2004). [ps][monofit.m][food.dat][fuel.dat][growth.dat]. J. of  Nonpar.    Statist., 16, 779-796.

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SiZer for smoothing splines (2004) (with J.S. Marron).  [pdf] software. Computational Statistics, 20, 481-502.

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Local polynomial mixed-effects models for longitudinal data (2002) (with H. Wu).

J. Amer. Statist. Assoc., 97, 883-897.

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The Study of long-term HIV dynamics using semiparametric nonlinear mixed-effects models (2002)(with H. Wu).  Statistics in Medicine, 21, 3655-3675.

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Two-step estimation for functional linear  models with applications to longitudinal data (2000) (with J. Fan) J. R. Statist. Soc. B 62 303-322.

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Minimax kernels for nonparametric curve estimation (2000)(with J. Fan). J. of  Nonparametric Statistics, Vol 12, No. 3, 417-445.

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Robust principal component analysis for functional data (1999, with discussions and rejoinder) ( with N. Locantore, J. S. Marron, et. al.) Test. Vol. 8, No. 1, 1-73. [website][movie1][movie2][ps]

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Comments on "Smoothing spline models for analysis of nested and crossed samples of curves" by Brumback and Rice (1998) (with J. Fan). J. Amer. Statist. Assoc. 93, 980-983.

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A project NT-type test for spherical symmetry of a multivariate distribution (1995) (with L.X. Zhu and K.T. Fang). Multivar. Statist. and Matrices in Statist.,eds. E.-M. Tiit, T. Kollo and H. Niemi, VSP-TEV, the Netherlands: Utrecht, 109-122.

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A new algorithm for estimating the parameters of nonlinear regression modellings (1993) (with K. T. Fang).  Acta Mathematicae Applicate Sinica. Vol. 16, No. 3, 366-377.

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Uniform design for experiments with mixture (1993). Chinese J. Appl. Prob. Statist. Vol. 9, No.2, 168-176.

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Computation of moments of order statistics (1990). J. Graduate School. Vol. 7, No. 1, 1-29.

 

Monograph and Book Chapters:

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Nonparametric Regression Methods for Longitudinal Data: mixed-effects modeling approaches (2006) (with H. Wu). Wiley, New York.

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A note on the bounded normal mean problem (2006) (with J. Fan). To appear.

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Zhang, J. -T. (2005). Thresholding regression splines with applications. Contemporary Multivariate Analysis and Experimental Designs. J. Fan and Gang Li (Eds.). pp. Spring-Verlag, New York.

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 Chen, J. W., Zhang, J. -T. and Wu, H. (2005). Discretization approach and nonparametric modeling for long-term HIV dynamic model. Computational Science and Its Applications. O. Gervasi et al. (Eds.). pp. 519-527. Spring-Verlag, Berlin, 2005.

 

TALKS:

  

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Nonparametric Mixed-Effects Models for Longitudinal Data (Korea07.pdf). The 2007 Fall Conference of the Korea Statistical Society. November 9-10, 2007. Seoul, South Korea.

 

Two-sample Test for Equal Covariance Functions for Functional Data (Kunming07.pdf). The 2007 International Conference on the Frontiers of Statistics” , August, 13-15, 2007, Kunming, Yunnan, China.

 

Two-sample Test for Equal Mean Functions for Functional Data (Taipei07.pdf). Taipei International Statistical Symposium and ICSA International Conference  Taipei, Taiwan, ROC, June 25-28, 2007.

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HIV Daynamics Modeling Using Semiparametric NLME models (Shanghai07.pdf). The 15-th International Conference of Forum for Interdisciplinary Mathematics on Interdisciplinary Mathematical & Statistical Techniques, Shanghai, China. May 20-23, 2007.

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Semiparametric Mixed-Effects Models for Longitudinal data. spme.pdf  Taipei Statistical Workshop. Dec 13-15, 2006.

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Analyzing longitudinal data using regression splines. rsmetalk1.pdf  Biostatistics Workshop-CTERU, August 18, 2006.

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Semiparametric mixed-effects models for longitudinal data using P-splines. Dept of Statistics, Texas A & M University. Nov. 17, 2005, and Dept of Biostat. and Computational Biology, University of Rochester, Dec., 2005.

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Nonparametric Modelings of Longitudinal Data Using Regression Splines. rsmetalk.ps

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Nonparametric Mixed-Effects Modeling Using Smoothing Splines. ssmetalk.ps

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The ICSA 2004 Singapore July 21-23,2004  FDA & SSME  FDA(ps)  SSME(ps)

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The ICSA 2000 Applied Statistics Symposium, June 1-3,  2000, Piscataway, New Jersey, USA:  "Semiparametric nonlinear mixed-effects models for longitudinal data with applications to HIV studies".

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 The ENAR 2000 Spring Meeting, March 19-23, 2000. Chicago, Illinois, USA: "Modeling HIV dynamics using unified mixed-effects models".

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The Student Seminar, October, 1997. Department of Statistics, UNC-Chapel Hill, USA: "Functional hypothesis testing".

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The National Conference on Geo-mathematics, April, 1990, Chengdu, China: "A new algorithm for estimating the parameters of nonlinear regression modelings".

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The International Workshop on Statistical Prediction of Mineral Resources, October, Wuhan, China: " A new algorithm for estimating the parameters of nonlinear regression modelings".

 

MANUSCRIPTS:

 

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Hypothesis tests for functional data (2005).

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F-type mixtures with applications (2005).

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Modeling HIV dynamics using unified mixed-effects models (2000) (with H. Wu).

 

 

Statistical Movies:

 

Movie: Analysis of Corneal Image

Movie: SiZer for Smoothing Splines   

 

Statistical Images

   Some Interesting Images and plots

TECHNICAL REPORTS:

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Criteria for the uniform design (1992) (with K.T. Fang). Technical Report. Department of Mathematics, Hong Kong Baptist University, Hong Kong.

THESIS  AND DISSERTATION:

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Master Thesis: Uniform design of  Latin square type (1990).      Printed in the Institute of Applied Mathematics, Academia Sinica, Beijing, China.

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 Ph. D. Dissertation: Smoothed Functional Data Analysis (1999). Department of Statistics, UNC-Chapel Hill, USA.

   

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