### 2021

**Plenary Panel: Impacts of COVID-19.**Symposium on Data Science & Statistics Conference, June 4, 2021.- Invited Speaker: Women in Data Science Conference @ Tucson.
**Methods, challenges and practical issues of COVID-19 projection: a data science perspective.** - Seminar Speaker: Department of Mathematics and Statistics, the University of North Carolina at Greensboro.
**Statistical modeling and inference for next-generation functional data.** - Seminar Speaker: Department of Statistics, George Mason University.
**Statistical modeling and inference for next-generation functional data.**

### 2020

- Invited Speaker: ICSA 2020 Applied Statistics Symposium-Houston, DEC 14, 2020.
**Spatiotemporal autoregressive partially linear varying coefficient models.** - Seminar Speaker: Department of Biostatistics, University of Nebraska Medical Center, DEC 4, 2020.
**Spatiotemporal dynamics, modeling and forecasting COVID-19 in the United States.** - Seminar Speaker: Department of Mathematics and Statistics, University of Toledo, NOV 20, 2020.
**Spatiotemporal dynamics, modeling and forecasting COVID-19 in the United States.** - Seminar Speaker: Department of Statistics, George Washington University, NOV 6, 2020.
**Statistical modeling and inference for next-generation functional data.** - Seminar Speaker: Department of Mathematical Sciences, Michigan Technological University, OCT 30, 2020.
**Statistical modeling and inference for next-generation functional data.** - Seminar Speaker: Department of Mathematical and Statistical Sciences, University of Alberta, OCT 28, 2020.
**Statistical modeling and inference for next-generation functional data.** - Seminar Speaker: Baker Center Seminar Series, Iowa State University, OCT 27, 2020.
**Modeling and forecasting COVID-19 in the United States.** - Invited Speaker: ASA Oregon Fall 2020 virtual meeting, OCT 19, 2020.
**Modeling and forecasting COVID-19 in the United States.** - Invited Speaker: Joint Statistical Meeting, August 5, 2020.
**Spatiotemporal dynamics, nowcasting and forecasting COVID-19 in the United States.** - Invited Speaker, Central University of Finance and Economics, China, July 15, 2020.
**Spatiotemporal dynamics, nowcasting and forecasting COVID-19 in the United States.** - Invited Presentation: The podcast Pod of Asclepius, June 19, 2020.
**Spatiotemporal dynamics, nowcasting and forecasting COVID-19 in the United States.** - Seminar speaker: ISU TRIPODS Seminar Series, June 11, 2020.
**Spatiotemporal dynamics, nowcasting and forecasting COVID-19 in the United States.** - Invited Speaker, Securities and Exchange Commission Data Science Seminar Series, May 13, 2020.
**Spatiotemporal dynamics, nowcasting and forecasting COVID-19 in the United States.** - Invited Speaker, the Webinar Series: Data Science In Action In Response To The Outbreak of COVID-19, May 1, 2020.
**COVID19 US dashboard: Spatiotemporal dynamics, nowcasting and forecasting COVID-19 in the United States.**

### 2019

- Invited Speaker, Department of Mathematical Sciences, IUPUI, OCT 18, 2019.
**Statistical modeling and inference for next-generation functional data.** - Invited Speaker, Department of Statistics, Iowa State University, SEP 30, 2019.
**Statistical modeling and inference for next-generation functional data.** - Invited Speaker, 2019 ICSA China Conference, Tianjin, China, JUL 1-4, 2019.
**Multivariate spline estimation and inference for image-on-scalar regression.** - Invited Speaker, The 3rd International Conference on Econometrics and Statistics (EcoSta 2019), Taiwan, JUN 25-28, 2019.
**Estimation and inference for generalized geoadditive models.** - Invited Speaker, The 3rd Lilac International Conference on Application of Statistics (LICAS 2019), Harbin, China, JUN 23-25, 2019.
**Multivariate spline estimation and inference for image-on-scalar regression.** - Invited Speaker, Department of Mathematics, College of William and Mary, April 13, 2019.
**Estimation and inference for generalized geoadditive models.**

### 2018

- Topic Contributed, 2018 Joint Statistical Meetings, Vancouver, Canada, JUL 28-AUG 2, 2018.
**Semiparametric Regression Methods for Spatial and Spatio-temporal Data with Application to Fine Particulate Matter (PM2.5) Studies.** - Invited Speaker, The 5th IMS Asia Pacific Rim Meeting (IMS-APRM), Singapore, JUN 26-29, 2018.
**Spatially varying coefficient model for functional image-on-scalar regression.** - Invited Speaker, The 2nd International Conference on Econometrics and Statistics (EcoSta 2018), Hong Kong, JUN 19-21, 2018.
**Spatially varying coefficient model for functional image-on-scalar regression.**

### 2017

- Invited Speaker, 2017 International Conference on Data Science, Shanghai, China, DEC 17-19, 2017.
**Spatially varying coefficient model for functional image-on-scalar regression.** - Invited Speaker, Tsinghua University, China, DEC 12, 2017.
**Semiparametric regression methods for spatial and spatiotemporal data.**

### 2016

- Invited Speaker, The Nonparametric Statistics Workshop: Integration of Theory, Methods and Applications, Ann Arbor, MI, OCT 6-7, 2016.
**Efficient estimation of partially linear models for spatial data over complex domains.** - Invited Speaker, 2016 IISA International Conference on Statistics, Corvallis, Oregon, AUG 18-21, 2016.
**Efficient estimation of partially linear models for spatial data over complex domains.** - Topic Contributed, 2016 Joint Statistical Meetings, Chicago, Illinois, JUL 30-AUG 4, 2016.
**Nonparametric estimation and inference for covariance functions.** - Invited Speaker, 25th ICSA Applied Statistics Symposium, Atlanta, GA, JUN 12-15, 2016.
**Efficient estimation of partially linear models for spatial data over complex domains.** - Invited Speaker, 15th International Conference in Approximation Theory, San Antonio, Texas, May 22-25, 2016.
**Bivariate penalized splines for geo-spatial regression.**

### 2015

- Invited Speaker, 8th International Conference of the ERCIM WG on Computational and Methodological Statistics, University of London, UK, December 12-14, 2015.
**Polynomial spline estimation for generalized partially linear single-index model.**

### 2014

- Invited Speaker, 2014 Joint Applied Statistics Symposium of ICSA & KISS, Portland, Oregon, June 15-18, 2014.
**Bivariate penalized splines for regression.** - Invited Speaker, Workshop on "Nonparametric Estimation and Functional Data", Corvallis, Oregon, JUN 13, 2014.
**Bivariate penalized splines for regression.** - Topic Contributed, Eastern North American Region Meeting, MAR 16-19, 2014, Baltimore, MA.
**Bivariate penalized splines for regression.**

### 2013

- Invited Speaker, The Second Taihu International Statistics Forum, JUL 6-8, 2013, Suzhou, China.
**Simultaneous inference for repeated functional data.** - Invited Speaker, Graybill Conference on Modern Survey Statistics, JUN 9-12, 2013, Fort Collins, CO.
**Estimation of small area means under semi-parametric measurement error model.** - Topic Contributed Speaker, Eastern North American Region Meeting, MAR 9-13, 2013, Orlando, FL.
**Variable Selection and Estimation for Longitudinal Survey Data.**

### 2012

- Invited Speaker, The 4th International Conference on Establishment Surveys, JUN 12, 2012, in Montreal, Quebec, Canada.
**Identifying factors affecting nonresponse rates of complex surveys.** - Invited Poster, Coalition for National Science Funding Exhibition & Reception on Capitol Hill, MAY 15, 2012, Washington, DC.
**Using Statistics to understand the causes of diabetes.****[Featured on the Amstat News, JUL 2012]** - Invited Speaker, Workshop on Biostatistics and Bioinformatics, MAY 6, 2012, in Atlanta, Georgia.
**Nonparametric estimation and model selection with applications to Pima Indian diabetes study.** - Topic-contributed Speaker, Eastern North American Region Meeting, APR 1-4, 2012, in Washington, D.C.
**Simultaneous variable selection and estimation in semiparametric modeling of longitudinal/clustered Data.**

### 2011

- Invited Speaker, US Bureau of Labor Statistics, JUL 14, 2011, in Washington DC.
**Identifying factors affecting nonresponse rates of complex surveys.** - Invited Speaker, Annual ICSA Applied Statistics Symposium, JUN 26-29, 2011, in New York City.
**Estimation and variable selection for longitudinal survey data.** - Invited Speaker, SRCOS 2011 Summer Research Conference, JUN 5-8, 2011, in McCormick, SC.
**Modeling and forecasting functional time series.** - Invited Speaker, US Bureau of Labor Statistics, MAR 3, 2011, in Washington DC.
**Estimation and variable selection for longitudinal survey data.** - Invited Speaker, Department of Statistics, Purdue University, JAN 28, 2011, in West Lafayette, IN.
**Estimation and variable selection for generalized additive partial linear models.** - Invited Speaker, Department of Statistics, Oregon State University, JAN 24, 2011, in Corvallis, OR.
**Estimation and variable selection for generalized additive partial linear models.**

### 2010

- Invited Speaker, Department of Mathematics, Statistics and Computer Science, University of Illinois at Chicago, NOV 23, 2010, in Chicago, IL.
**Estimation and variable selection for generalized additive partial linear models.** - Invited Speaker, Department of Mathematics, University of Georgia, OCT 12, 2010, in Athens, GA.
**Spline-****backfitted****kernel smoothing of additive models in nonlinear time series.** - Invited speaker (Two Minutes Madness). SAMSI Workshop, SEP 11-15, 2010, in Research Triangle Park, NC.
**Confidence envelopes for covariance functions in functional data.** - Invited Speaker, Joint Statistical Meetings, JUL 31-AUG 5, 2010, in Vancouver, BC Canada.
**Semiparametric Marginal Mean Models for Longitudinal Survey Data.**Invited Speaker, Summer At Census, JUL 12-16, 2010, at Census Bureau, Washington, D.C.**Semiparametric Marginal Mean Models for Longitudinal Survey Data.**Discussant. Annual ICSA Applied Statistics Symposium, JUN 20-23, 2010, in Indianapolis, IN.**Discussion on "Applications of Non- and Semiparametric Methods to Time Series and Longitudinal Data".** - Invited Speaker, Annual ICSA Applied Statistics Symposium, JUN 20-23, 2010, in Indianapolis, IN.
**Estimation and variable selection for generalized additive partial linear models.**

### 2009

- Discussant. Joint Statistical Meetings, AUG 1-6, 2009, in Washington, D.C.
**Discussion on "Recent Advances in the Applications and Theory of Spline Smoothing".** - Topic-contributed Speaker, Joint Statistical Meetings, AUG 1-6, 2009, Washington, DC.
**Semiparametric Estimation of ARCH(infinity) Models.** - New-researcher Speaker, 12th IMS New Researchers Conference, JUL 27-31, 2009, in Baltimore, MD.
**Spline-****backfitted****kernel smoothing of additive models in time series.** - Invited Speaker, Annual ICSA Applied Statistics Symposium, JUN 21-24, 2009, in San Francisco, CA.
**Spline-****backfitted****kernel smoothing of additive models in time series.** - New-researcher Speaker, Symposium on New Directions in Asymptotic Statistics, MAY 15-16, 2009, in Athens, GA.
**Semiparametric Estimation of ARCH (infinity) Models.** - Colloquium Speaker, Department of Biostatistics and Bioinformatics, Emory, JAN 29, 2009, in Atlanta, GA.
**Spline-****backfitted****kernel smoothing of additive models in time series.** - Poster, University of Florida 11th Annual Winter Workshop: Semiparametric Statistics, JAN 8-10, 2009, Gainesville, FL.

### 2008

- Colloquium Speaker, Department of Mathematical Sciences, Clemson, OCT 30, 2008, in Clemson, SC.
**Semiparametric Estimation of ARCH (infinity) Models.** - Colloquium Speaker, Department of Mathematics, Georgia Tech, OCT 29, 2008, in Atlanta, GA.
**Semiparametric Estimation of ARCH (infinity) Models.** - Student Seminar Speaker, Department of Statistics, University of Georgia, OCT 28, 2008, in Athens, GA.
**Semiparametric Estimation of ARCH (infinity) Models.** - Contributed Speaker, Joint Statistical Meetings, AUG 2-7, 2008, Denver, CO.
**A Simple Semiparametric Method for Estimating ARCH (infinity) Models.**

### 2007

- Student Seminar Speaker, Department of Statistics, University of Georgia, SEP 18, 2007, in Athens, GA.
- Colloquium Speaker, Computational Systems Biology Lab, University of Georgia, AUG 30, 2007, in Athens, GA.
**Polynomial spline smoothing for nonlinear time series.** - Invited Speaker, University of Miami, California State University at Long Beach, University of Kansas, Indiana University, Colorado State University, University of Georgia, Penn State University, George Washington University, Georgia Tech, College of William and Mary.

### 2005-2006

- Colloquium Speaker, Department of Statistics and Probability, Michigan State University, OCT 24, 2006, in East Lansing, MI.
**Spline-****backfitted****kernel smoothing of additive models in time series.**- Colloquium Speaker, Department of Statistics, Texas A and M University, OCT 5, 2006, in College Station, TX.
**Spline single-index prediction model.** - Contributed Speaker, Joint Statistical Meetings, AUG 6-10, 2006, Seattle, WA.
**Spline single-index prediction model.** - Contributed Speaker, the 69th IMS Annual Meeting, JUL 30-AUG 4, 2006, Rio de Janeiro, Brazil.
**Spline single-index prediction model.** - Invited Speaker, Annual ICSA Applied Statistics Symposium, JUN 14-17, 2006, Storrs, CT.
**Nonparametric quantification of economic intervention's impact on the environmental change.** - Invited Speaker, the 38th Symposium of the Interface of Statistics, Computer Science and Applications, May 24-27, 2006, Pasadena, CA.
**Spline-****backfitted****kernel smoothing of the nonlinear additive autoregression models.** - Poster, University of Florida Eighth Annual Winter Workshop: Frontiers of Theoretical Statistics, JAN 14-16, 2006, Gainesville, FL.
- Poster, NISS/SAMSI workshop on Financial Mathematics, Statistics, and Econometrics, SEP 18-21, 2005, in Research Triangle Park, NC.