| C.J. DUAN | |
| Data Scientist. Ph.D | |
| @Data.Scientist@dulun.com ♂phone757-742-3896 ♂¶ap-¶arkerDRC Lab, Virginia /gl⌢bewww.dulun.com | |
| /linkedincj-duan-3ab27a191 /githubhublun | |
| EXPERIENCE | |
| Data Scientist (contract) | |
| Fortune 500 Company (CPG), Research Data Science | |
| Ὄ52021 - 7.2022 ♂¶ap-¶arkerRemote | |
| •Input Data (Snowflake on AWS): Time-series of weekly sales data and | |
| weekly media (advertising) spend and GRP (Impression)s | |
| •Model: State-Space Bayesian Media Mix Model using R and RStan | |
| •Output Results: ROI effectiveness in terms of MC (media contribution) | |
| over MS (media spend) | |
| Chief Research Data Scientist | |
| DRC Lab @ Dulun Research & Consulting | |
| Ὄ52016 - Now ♂¶ap-¶arkerFreelance | |
| Completed Projects : | |
| •(2020-2021) Algorithmic Trading Robot, coded in Python, digests recent | |
| (commodity future) prices and execute order composition and routing | |
| automatically. | |
| FFT, Risk Control, Trading | |
| •(2016-2017) Develop the best distribution routing model, which saved | |
| an Alabama flower-growing farmer thousands fuel dollars on monthly | |
| basis. | |
| Transportation Scheduling, Constraint Programming, OR | |
| Replication & Learning Projects (2016 - now) : | |
| •Analysis of 6.4 million SARS-CoV-2 genomes identifies mutations | |
| associated with fitness (Obermeyer, et. al. , 2022, Science ) | |
| Bayesian multinomial logistic regression model using Pyro | |
| •Survival analysis in Stan (Filipe S. Dias, 2022, Web Blog ) | |
| Survival Analysis | |
| •Deep learning recommendation model for personalization and | |
| recommendation systems (Naumov, et. al. 2019, ArXiv ) | |
| TorchRec | |
| •Bayesian Inference for a Generative Model of Transcriptome Pro- | |
| files from Single-cell RNA Sequencing (Lopez, et. al. , 2018, Na- | |
| ture Methods ) | |
| Variational Inference for Generative Model of scRNA seq using PyTorch and Pyro | |
| •Bayesian aggregation of average data: An application in drug de- | |
| velopment (Weber, et. al. , 2018, Annals of Applied Statistics ) | |
| Pharmacometric Model using RStan | |
| Assistant Professor of Quantitative Methods | |
| Troy University | |
| Ὄ5March 2009 – May 2017 ♂¶ap-¶arkerTroy, Al | |
| Research Projects : | |
| •Research Paper (2021): Team Contingent or Sport Native? A Bayesian | |
| Analysis of Home Field Advantage, | |
| •Research Paper (2021): Exposing model bias in machine learning revisit- | |
| ing the boy who cried wolf in the context of phishing detectionWORK PHILOSOPHY | |
| “Modeling in the sciences is in fact al- | |
| most always generative modeling” | |
| Kingma and Welling (2019) | |
| MOST PROUD OF | |
| /gavelHidden Markov Model (HMM) | |
| state space, transition, and emission | |
| /binocularsMarkov Decision Process (MDP) | |
| states, actions, rewards | |
| /cogsPyro & PyTorch | |
| SVI (stochastic variaitonal inference) based | |
| Variational Autoencoder | |
| ⌛Multi-Arm Bandit (MAB) and RL | |
| 𝜋policy mapping actions to contexts | |
| /meetupMedia Mix Modeling | |
| ROAS, mROAS, Adstock, Hill function | |
| ἲ1A/B Testing and MCI | |
| multiple causal (treatment) inference | |
| ὖELDA / Mixture / Clustering | |
| Latent Dirichlet Allocation, Topic Models | |
| Ὠ0Stan & Bayesian Modeling | |
| data, parameters, model, and prediction | |
| Ἴ6Servire Est Vivere | |
| helping Braydon Farm LLC in Alabama opti- | |
| mize their daily flower delivery routes using | |
| Transportation Model | |
| EDUCATION | |
| Ph.D in Industrial Management | |
| Clemson University | |
| Ὄ52000 – 2007 | |
| REMARKS | |
| "...On behalf of my wife and I, we would like to sin- | |
| cerely thank Dr. Duan, Mrs. Amy Hu, and you for the | |
| time you spent developing a distribution plan for our | |
| new floral operation. We have incorporated it into our | |
| operation and it appears to have significantly reduced | |
| our travel time and expenses in distribution our prod- | |
| ucts to the Marvin Stores chain. Hopefully this will bePUBLICATIONS | |
| /file-altJournal Articles | |
| •(Chaojie), D. C. J., & Chakravarty, A. (2021). Team contingent | |
| or sport native? a bayesian analysis of home field advantage in | |
| professional soccer. Journal of Business Analytics ,4(1), 67–75. | |
| doi:10.1080/2573234X.2020.1854625 | |
| •(Chaojie), D. C., & Gaurav, A. (2021). Exposing model bias in ma- | |
| chine learning revisiting the boy who cried wolf in the context | |
| of phishing detection. Journal of Business Analytics ,4(2), 171– | |
| 178. doi:10.1080/2573234X.2021.1934128. eprint: https: | |
| / /doi.org/10.1080/2573234X.2021.1934128 | |
| •Duan, C. [C.J.], & Pierce, G. S. (2017). Starting operations man- | |
| agement with a ‘Big Bang’: Using sitcom to introduce OM con- | |
| cepts to students. Operations Management Education Review ,11, | |
| 115–122. | |
| •Duan, C. [CJ], Hu, J., Garrott, S., et al. (2016). Using excel solver | |
| to solve Braydon Farms’ truck routing problem: A case study. | |
| South Asian Journal of Management Sciences (SAJMS) ,10(1), 38– | |
| 47. doi:10.21621/sajms.2016101.04 | |
| •Duan, C. [Chaojie], Grover, V., Roberts, N., & Balakrishnan, N. ( | |
| (2014). Firm valuation effects of the decision to adopt relation- | |
| ally governed business process outsourcing arrangements. In- | |
| ternational Journal of Production Research ,52(15), 4673–4694. | |
| doi:10.1080/00207543.2014.884289. eprint: https:/ /doi.org/ | |
| 10.1080/00207543.2014.884289 | |
| •Kronenburg, M. A., Shetterly, D. R., Duan, C., Krishnamoorthy, | |
| A., & Loutzenhiser, K. (2013c). The impact of contract design | |
| on contract performance satisfaction. International Journal of | |
| Management Research and Reviews ,3(4), 2673. | |
| •Duan, C. [Chaojie], Grover, V., & Balakrishnan, N. ( (2009). Busi- | |
| ness process outsourcing: An event study on the nature of pro- | |
| cesses and firm valuation. European Journal of Information Sys- | |
| tems ,18(5), 442–457. doi:10.1057/ejis.2009.38 | |
| /usersConference Proceedings | |
| •Duan, C. [C.J.]. (2013). Retrieving hypothesis parameters from | |
| real life events. In The 43rdsoutheast decison sciences institute | |
| conference proceedings . SE DSI. | |
| •Kronenburg, M. A., Shetterly, D. R., Duan, C., Krishnamoorthy, | |
| A., & Loutzenhiser, K. (2013a). Public management skills needed | |
| in contract development. In The southeastern conference for pub- | |
| lic administration . SECoPA. | |
| •Kronenburg, M. A., Shetterly, D. R., Duan, C., Krishnamoorthy, | |
| A., & Loutzenhiser, K. (2013b). Public management skills needed | |
| in contract development. In The southeastern conference for pub- | |
| lic administration . SECoPA. | |
| •Kronenburg, M. A., Shetterly, D. R., Duan, C., Krishnamoorthy, | |
| A., & Loutzenhiser, K. (2012). The impact of contract design on | |
| contractor performance - a second look. In 5thinternational pub- | |
| lic procurement conference . IPPC. | |
| •Duan, C. [C.J.]. (2004). Teams in TQM: An knowledge based | |
| view. In The 35thdsi. | |
| •Duan, C. [C.J.]. (2001). One machine scheduling of jobs to min- | |
| imize total weighted tardiness. In The 37thsoutheast informs . SE | |
| INFORMS.an on-going study and we will be able to “tweak” or al- | |
| ter the system based on your recommendations as our | |
| business grows..." | |
| Stephen (Brad) Bradshaw Garrott | |
| Owner, Braydon Farms, 2015 | |
| "...I work on projects focused on educating high school | |
| students in Mississippi in entrepreneurship opportu- | |
| nities and what resources are available to start-ups. I | |
| use Excel frequently and I am thankful for being familiar | |
| with excel formula’s like vlookup and IF. ... I wish there | |
| was an Operations Management class because that | |
| was my favorite in undergrad and where I find myself | |
| passionate. I am considering entering the workforce | |
| aiming for an Operations Management position based | |
| on my success in your class and how much I enjoyed it. | |
| I think your class is very important and I’m glad I had | |
| the opportunity to learn from you. I am also open to | |
| entrepreneurship opportunities as I am so active in the | |
| entrepreneurship ..." | |
| Russell, QM 3345, 2016 |