Zheng (David) Wei Department of Mathematics and Statistics University of Maine 5752 Neville Hall, Room 330 Orono, ME 04469-5752 Cell phone:(413)210-0952 Office phone: (207)581-3934 UMaine E-mail: zheng.wei@maine.edu Dept E-mail: wei@math.umaine.edu Personal webpage http://math.umaine.edu/ wei/ Employment Assistant Professor (Tenure track) at Department of Mathematics and Statistics, University of Maine. 08/2017-present Visiting Assistant Professor (Postdoctoral position) at Department of Mathematics and Statistics, University of Massachusetts Amherst. 08/2015-08/2017 Education Ph.D. Mathematics 08/2011-05/2015 with major in Probability and Statistics Minor degree in Computer Sciences Department of Mathematical Sciences, New Mexico State University, Las Cruces, New Mexico. Advisor: Prof. Tonghui Wang M.S. Mathematics 08/2009-05/2011 with major in Probability and Statistics Department of Mathematical Sciences, New Mexico State University, Las Cruces, New Mexico. Advisor: Prof. Tonghui Wang M.S. Mathematics 09/2006-07/2009 with major in Topological Dynamic System Mathematics Department, Northwest University, Xi an, P.R. China. Advisor: Prof. Yangeng Wang B.S. Mathematics 09/2002-07/2006 with major in Information and Computational Science Mathematics Department, Northwest University, Xi an, P.R. China. Research Interests Bayesian statistical methods for data science, big data and analytic, Parallel computing method for non-gaussian posterior distributions, Parallel computing methods for Bayesian Dynamic Item Response Models. Multivariate Analysis Copula theory, Asymmetric (Skew-normal) copula construction, Copula-based regression, Asymmetric dependence measures. Random Sets and Inferential Model Construction of multivariate random sets based on copulas, and Joint belief functions. Applied Mathematical Problems and Bio-Mathematics Control of a space robot for capturing, Senior fall problem, and Colescent theory.
Topological Dynamical System on Non-Compact Space Co-compact entropy, Variational principle. Computer Skills Publications R, SAS, WinBugs for data analysis; Java Programming; Matlab; C Programming. Published: 19. Zheng Wei, and Daeyoung Kim. On multivariate asymmetric dependence using multivariate skew-normal copula-based regression. International Journal of Approximate Reasoning. (2018) 92, 376-391. DOI: https://doi.org/10.1016/j.ijar.2017.10.016 18. Zheng Wei, Xiaojing Wang, and Erin Conlon. Parallel Markov chain Monte Carlo for Bayesian dynamic item response models in educational testing. STAT. (2017) 6 (1), 420-433. DOI: https://doi.org/10.1002/sta4.164 17. Zheng Wei, Seongyong Kim, Boseung Choi, and Daeyoung Kim. Multivariate Skew Normal Copula for Asymmetric Dependence: Estimation and Application. (2017) (accepted by International Journal of Information Technology and Decision Making.) DOI:https://doi.org/10.1142/S021962201750047X 16. Zheng Wei, and Daeyoung Kim. Subcopula-based Measure of Asymmetric Association in a Contingency Table. Statistics in Medicine. (2017) 1-20; DOI: https://doi.org/10.1002/sim.7399 15. Zheng Wei, Daeyoung Kim and Tonghui Wang. A multivariate generalized FGM copulas and its application to multiple regression. Robustness in Econometrics. Springer International Publishing, 2017. pp. 363-378 14. Qianfang Hu, Baokun Li, Zheng Wei, and Tonghui Wang. A New Estimation Method for Normal Mixture Distribution. Robustness in Econometrics. Springer International Publishing, 2017. pp. 217-233. 13. Angel Flores-Abad, Lin Zhang, Zheng Wei, and Ou Ma. Optimal Capture of a Tumbling Object in Orbit Using a Space Manipulator. Journal of Intelligent & Robotic Systems, (2016): 1-13. 12. Zheng Wei, Seongyong Kim and Daeyoung Kim. Multivariate skew normal copula for non-exchangeable dependence. Procedia Computer Science, (2016) 141-150. 11. Alexey Miroshnikov, Zheng Wei, and Erin Conlon. Parallel Markov chain Monte Carlo for non-gaussian posterior distributions. STAT, 4.1 (2015): 304-319. 10. Zheng Wei, Tonghui Wang and Daeyoung Kim. Multivariate skew normal factor copula models with applications on the analysis of directional dependence. Causal Inference in Econometrics. Springer International Publishing, 2015. pp. 185-198. 9. Zheng Wei, Tonghui Wang and Baokun Li. On Consistency of Estimators Based on Random Set Vector Observations.Causal Inference in Econometrics.
Springer International Publishing, 2015. pp. 171-184. 8. Zheng Wei, Tonghui Wang and Phuong Anh Nguyen. Multivariate dependence concepts through copulas. International Journal of Approximate Reasoning, 65 (2015): 24-33. 7. Zheng Wei, Tonghui Wang, Baokun Li and Phuong Anh Nguyen. The joint belief function and Shapley value for the joint cooperative game. Econometrics of Risk. Springer International Publishing, 2015. pp. 115-134. 6. Zheng Wei, and Tonhui Wang, 2014. The joint distribution of discrete random sets and its conncetions to subcopulas. In JSM Proceedings, Distribution Theory Section. Boston, MA: American Statistical Association. 3415-3428. 5. Angel Flores-Abad, Zheng Wei, Ou Ma and Khanh Pham. Optimal control of space robots for capturing a tumbling object with uncertainties. Journal of Guidance, Control, and Dynamics 37.6 (2014): 2014-2017. 4. Zheng Wei, Tonghui Wang and Wararit Panichkitkosolkul. Dependence and Association Concepts through Copulas. Modeling Dependence in Econometrics. Springer International Publishing, 2014. pp. 113-126. 3. Angel Flores-Abad, Zheng Wei, and Ou Ma. Optimal control of a space robot to approach a tumbling object for capture with uncertainties in the boundary conditions. AIAA Guidance, Navigation, and Control (GNC) Conference, 2013, 4522. 2. Zheng Wei, Yangeng Wang, Guo Wei, Tonghui Wang and Steven Bourquin. The entropy of co-compact open covers. Entropy, 15.7 (2013): 2464-2479. 1. Zheng Wei, Yangeng Wang, Guo Wei. A new entropy: co-compact entropy. Science Journal of Northwest University Online, 7 (2009): 1-13. Submitted: 5. Qianfang Hu, Baokun Li, Zheng Wei, and Tonghui Wang. New Estimation Method for Mixture of Normal Distributions. (2017) (submitted). 4. Zheng Wei, and Daeyoung Kim. Measure of Asymmetric Association in Contingency Tables via the Bilinear Extension Copula-based Regression. (2017) (submitted). 3. Zheng Wei, Xiaojing Wang, and Erin M. Conlon. Parallel Computing Methods for Bayesian Dynamic Item Response Models in Educational Testing. (2016) (submitted). 2. Zheng Wei, and Daeyoung Kim. On Multivariate Asymmetric Dependence using Multivariate Skew-Normal Copula-based Regression. (2016) (submitted). 1. Zheng Wei, Hongkun Zhang, and Zijing Zhang. A copula-garch approach of conditional dependence among oil, gold and U.S. dollar exchange rates. (2016) (submitted). In Preparation: 5. Zheng Wei, and Erin M. Conlon. Parallel Computing for Copula Parameter Estimation with Big Data, (in preparation). 4. Zheng Wei, and Daeyoung Kim. Tail Dependence of the Copulas for Negative Associated Data, (in preparation).
3. Zheng Wei, and Erin M. Conlon, Parallel Computing Methods for the Goodness of Fit Test on Copulas, (in preparation). 2. Zheng Wei, and Tonghui Wang, How to Explain the Definition of Stochastic Affiliation to Economics Students, (in preparation). 1. Zheng Wei, Tonghui Wang and Baokun Li. Joint Distribution of Random Set Vectors and Its Applications in Bivariate CAR Models (in preparation). Teaching Experience Instructor: University of Maine: STS-332 - Statistics for Engineers Fall 2017 Northwest University, Xi an, China A short course in copula theory June 21- June 22, 2017 University of Massachusetts Amherst: STAT 597 - Statistics Computing (R and SAS based) Spring 2017 STAT 516 - Statistics II (Section 01) Spring 2017 STAT 516 - Statistics II (Section 01) Fall 2016 STAT 515 - Statistics I (Section 06) Fall 2016 STAT 515 - Statistics I (Section 01 and 02) Spring 2016 STAT 515 - Statistics I (Section 02 and 03) Fall 2015 New Mexico State University: MATH 192 - Calculus II Spring 2015 MATH 191 - Calculus I Fall 2014 STAT 371 - Probability and Statistics for Engineers Summer 2014 MATH 190 - Pre-calculus Spring 2014 STAT 251G - Statistics for Business and the Behavioral Sciences Fall 2013 STAT 251G-Statistics for Business and the Behavioral Sciences Spring 2013 STAT 251G - Statistics for Business and the Behavioral Sciences Fall 2012 STAT 251G-Statistics for Business and the Behavioral Sciences Spring 2012 MATH 120 - Intermediate Algebra Fall 2011 MATH 120 - Intermediate Algebra Spring 2011 MATH 121 - College Algebra Fall 2010 Teaching Assistant: MATH 121 - College Algebra Spring 2010 MATH 121 - College Algebra Fall 2009 Real Analysis (Northwest University, China) Fall 2007 Academic Experience Research Assistant Supported by research assistantship from Department of Mechanical and Aerospace Engineering 05/2011-01/2014 Topics: 1. Control of a Space Robot for Minimal Attitude Disturbance to the Base Satellite for Capturing a Tumbling Satellite. (Sponsored by US Air Force Research Laboratory(AFRL) under agreement number FA9453-11-1-0307) 2. A New Approach for a Robot to Capture a Fast Moving/Rotating Object Inspired from Human Arms Performing Similar Tasks. 3. Human movements control of balance (Senior fall problem). Mentors: Prof. Tonghui Wang and Prof. Ou Ma. Two proposals submitted for NSF fund.
Graduate Assistant Department of Mathematical Sciences 08/2009-08/2015 Consulting Experience: Statistical consulting for Dr. Ou Ma (Professor), the Department of Mechanical and Aerospace Engineering, New Mexico State University. 2011-2014 Statistical consulting for Dr. Jinfa Zhang (Professor), the College of Agricultural, New Mexico State University. 2011-2012 Presentations 16. Invited Talk: On Multivariate Asymmetric Dependence Using Multivariate Skew- Normal Copula-based Regression. Machine Learning Theory and its Applications in Medical Data Analysis workshop, School of Mathematics, Northwest University, Xi an China, June 19 - June 23, 2017. 15. Invited Talk: On Multivariate Asymmetric Dependence using Multivariate Skew- Normal Copula-based Regression. The 31 st New England Statistics Symposium - University of Connecticut, Storrs, Connecticut, April 21, 2017. 14. Job Talk: Multivariate Skew Normal Copula for Asymmetric Dependence: Estimation and Application. Job Talk at University of St. Thomas, Minnesota, Jan 23rd, 2017. 13. Invited Talk: A New Estimation Method for Mixture of Normal Distribution. 10th International Conference of the Thailand Econometric Society, Chiang Mai, Thailand, Jan 12, 2017. 12. Invited Talk: A Multivariate Generalized FGM Copulas and Its Application to Mul- tiple Regression. 10th International Conference of the Thailand Econometric Society, Chiang Mai, Thailand, Jan 12, 2017. 11. Invited Talk: Statistics with Copulas: An Invitation To Modern Statistics. Department of Mathematics and Statistics, University of Massachusetts Amherst, Nov 9, 2015. 10. Invited Talk: Copulas: What, How and Why? Seventh NeSA NMSU International Conference, NMSU, Mar 21, 2015. 9. Three-Minute Thesis Talk Competition Saturday March 14. 8. Contributed Talk: The Joint Belief Function and Shapley Value for the Joint Cooperative Game. Joint Mathematics Meetings, San Antonio, TX, Jan 13, 2015. 7. Invited Talk: Dynamical Copula Based Markov Chain with Application on Genealogy Coalescent Theory. The 15th Joint NMSU/UTEP Joint Workshop, UTEP, TX, Nov. 2014. 6. Contributed Talk: Joint Distribution of Random Set Vector and Its Applications in Bivariate CAR Models. Joint Statistical Meetings, American Statistical Association, Boston, MA, Aug 07, 2014. 5. Invited Talk: How to Explain the Definition of Stochastic Affiliation to Economics. Sixth NeSA NMSU International Conference, NMSU, Mar 22, 2014. 4. Contributed Talk: Dependence and Association Concepts through Copulas. Joint Mathematics Meetings, Baltimore, MD, Jan. 2014 3. Invited Talk: Skew-normal Construction beyond Factor Copula Model. The 14th Joint NMSU/UTEP Joint Workshop, UTEP, TX, Nov. 2013 2. Invited Talk: Dependence, Association Concepts via Copula.International Workshop on Applied Mathematics and Statistics, Northwest A&F University. Yangling, China, May 29-30, 2013. 1. Invited Talk: Stochastic Optimal Control of a Space Robot to Approach a Tumbling Object for Capture. The 12th Joint NMSU/UTEP Joint Workshop, UTEP, TX, Nov. 2013.
Teaching Workshops Honors and Fellowship Professional Memberships Referee/Reviewer Organization Leadership Community Services NMSU Teaching Academy Events Attended: The Promising Syllabus; WAC Effects: Multimodal Writing Across the Curriculum; Let s Talk Online Teaching; What Factors Affect Faculty Decisions about the Types of Assignments They Give to Students? FY17 Research Support Fund, UMass Amherst 2017 The Best Paper Award of Information Technology and Quantitative Management (ITQM 2016) FY16 Research Support Fund, UMass Amherst 2016 Mathematics Scholarship, NMSU 03/2015 Department of Mathematical Sciences Travel Award 01/2015 College of Arts & Sciences Travel Award, NMSU 01/2015 Department of Mathematical Sciences Travel Award 08/2014 Graduate School Travel Award, NMSU 08/2014 College of Arts & Sciences Travel Award, NMSU 01/2014 Department of Mathematical Sciences Travel Award 01/2014 Research Fellowship, Sponsored by US Air Force Research Laboratory (AFRL) under agreement number FA9453-11-1-0307. 05/2012-12/2012 Graduate Assistant Tuition Fellowships, NMSU 08/2011-05/2014 Third Rank Major Scholarship (Northwest University, China) 2005 Massachusetts Society of Professors American Statistical Association American Mathematical Society Mathematical Association of America Journal of Statistical Theory and Practice Communications in Statistics Theory and Methods Mathematical Reviews/MathSciNet Journal of AI and Data Mining President, Math Graduate Student Organization (MGSO) - NMSU, Fall 2014- Spring 2015; Vice-president, MGSO-NMSU, Fall 2013- Spring 2014; Secretary, MGSO-NMSU, Fall 2012-Spring 2013; Treasurer, MGSO-NMSU, Fall 2011-Spring 2012. Keep State Great Project (cleaning, painting, and picking up trash on the NMSU campus), Fall 2014, Fall 2013, Fall 2012 and Fall 2011; NMSU Blood Drive Volunteers (Helping people to donate blood); and Voice A- gainst Cancer, Fall 2014; The host for Mid-autumn Festival program (the biggest event for Chinese Student and Scholar Association, more than 200 people attended), Sep 13th, 2014.