Jiayi Zheng
Fairfax,US
Overview
6
6
years of professional experience
1
1
Certification
Work History
Internet Technology Advisor
Grant-Thornton
01.2019 - 07.2019
- Worked with a team in GOME, one of the largest electronic retailers in China
- Applied time series on historical sales to predict future sales in one store, reaching a difference of less than 8%
- Used linear regression to predict half-year revenue, based on the revenue of the former half year
- Used robotic process automation to complete mechanical work, like filling in accounting forms
- Required R, Python, VBA, UIPath, Alteryx, and Microsoft skills.
Teaching Assistant
Teaching Assistant
09.2021 - Current
- Help with over 100 students every term for over 5 different courses in total.
- Provided additional support for students with special needs, ensuring they received appropriate accommodations and resources.
- Copied, organized and distributed classroom assignments or other paperwork.
Teaching Assistant in Mathematics of Politics
Teaching Assistant
09.2020 - 12.2020
- Communicated with the lecturer and students, marked the homework and exams
- Using R and Tableu to check attendance, timely followed the fluctuations in grades individually.
Tour Guide
Discovery International Education and Travel Group
07.2018 - 08.2018
- Maintained accurate records of daily tour attendance, expenses, and revenues for accurate reporting to management team members.
- Provided suggestions and recommendations for activities, restaurants and accommodations to keep customers entertained after tour hours.
- Improved group safety by vigilantly monitoring tour participants and implementing strict adherence to safety guidelines.
Education
Master of Science in Statistics -
George Washington University
01.2021
Ph.D. - Statistics
George Mason University
Fairfax, VA05.2026
Bachelor of Science in Mathematics with Statistics -
Imperial College London
06.2018
Skills
- Python, R, SQL, VBA, MATLAB, SAS, LATEX
- Chinese (Native Proficiency), English (Full Professional Proficiency), French (Beginner)
- Microsoft, Alteryx, UIPath
Projects
A Study of Negative Binomial Random Effect Models, Fairfax VA, US, GMU, 09/2022-12/2022,
- Implemented EM algorithm with Pólya-Gamma Pseudo variable and Gibbs Sampling to predict random effects.
- Created coding according to rough descriptions and achieved high precision.
Robust Bayesian Outlier Detection, Fairfax VA, US, GMU, 09/2022-12/2022,
- Detect outliers and estimate unknown parameters with EM algorithm for Laplace distribution and t-distribution.
- Used complicated coding and algebraic calculations.
- Directed by Prof, Martin. P. Slawski and the results would be used in his future research.
Supervised Change Point Detection, Washington DC, US, GWU, 05/2020-06/2020,
- Used supervised machine learning method including decision tree, support vector machine, and KNN to detect change in mean or variance of a time series.
- Close communication with lecturer and team member.
- Results outplayed existing R packages in some ways and were commented on by the lecturer.
Relationship between Coronavirus and the Number of Hospitals, Washington DC, US, GWU, 05/2020, 06/2020,
- Used probit and log-log model to study the relationship between COVID-19 cases and the number of hospitals in a region.
- Showed advanced data mining skill by gathering different statistics from websites.
- 'Sophisticated, Amazing, and Unexpectedly trendy'—commented by the lecturer and received a full mark.
Hobbies and Interests
Calligraphy, swimming, writing novel, travelling (Europe and Tibet self-driving) and table role-play games
Certification
Oracle Database SQL Certified Associate
Extracurricular Activities
Calligraphy Society of Student Union, London, UK, Treasure Officer, 10/2015, 06/2018, Taught members to write Chinese calligraphy, empowered members to be creative and increased attendance by 80% more. Attracted new members of the society by giving out small gifts such as self-made bookmark with calligraphy and letting them to experiences on-site. Guided the members to the Chinese Museum of the British Museum and explained the classics to them. Hall Represent of IC Apartment, London, UK, 10/2015, 06/2016, Organized several events for Halloween, Chinese New Year, etc.
Timeline
Teaching Assistant
Teaching Assistant
09.2021 - Current
Teaching Assistant in Mathematics of Politics
Teaching Assistant
09.2020 - 12.2020
Internet Technology Advisor
Grant-Thornton
01.2019 - 07.2019
Tour Guide
Discovery International Education and Travel Group
07.2018 - 08.2018
Master of Science in Statistics -
George Washington University
Ph.D. - Statistics
George Mason University
Bachelor of Science in Mathematics with Statistics -
Imperial College London
Oracle Database SQL Certified Associate