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๐Ÿ‘‹ Hi, I'm Peter Liu!

Welcome to my Data Science Portfolio! Here youโ€™ll find a collection of projects that reflect my passion for data-driven discovery, analytics, and real-world problem-solving.


๐Ÿš€ Featured Projects

Project Topic Description Link ๐Ÿ› ๏ธ Tech Stack
1. Court Logic Multi-Agent Legal Reasoning A multi-agent RAG system simulating Supreme Court-style reasoning, orchestrating AI justices in debate grounded in legal precedent and real case law from CourtListener. View ๐Ÿ Python, ๐Ÿ”— LangChain, ๐Ÿ•ธ๏ธ GraphRAG, ๐Ÿง  LLM
2. Delaydar Flight Delay Prediction Predicting flight delays 15+ minutes using distributed machine learning on 25M+ flight records, integrating weather signals, network features, and cascading delay effects with transformer-based models. View ๐Ÿ Python, ๐Ÿ”— PySpark, ๐Ÿง  Transformers, ๐Ÿ“Š XGBoost
3. Multi-Persona RAG System Multi-Persona RAG System Developing a Retrieval-Augmented Generation (RAG) system capable of handling multi-persona dialogues for advanced conversational AI. View ๐Ÿ Python, ๐Ÿ”— LangChain, ๐Ÿง  RAGAS, โš–๏ธ LLM as a Judge
4. Marathon Time Series Analysis Structural Breaks in Time Series Data Detecting and interpreting structural breaks in marathon performance data using time series analysis methods. View ๐Ÿ Python, ๐Ÿ“ˆ Statsmodels, ๐Ÿ“Š Matplotlib
5. Video Game Engagement Regression Analysis Measuring and modeling player engagement, retention, and satisfaction in video games through behavioral data analysis. View ยฎ๏ธ R, ๐Ÿ“ Linear Regression
6. Cart Abandonment Prediction Churn Prediction Building predictive models to understand and mitigate online shopping cart abandonment, driving e-commerce optimization. View ๐Ÿ Python, ๐ŸŒณ Random Forest, ๐Ÿง  DNN
7. Interest Rate Policy Time Series Analysis Time Series Analysis The research analyzed the Fed's interest rate policy via the Taylor Rule and models, finding OLS and VAR generalized best. View ยฎ๏ธ R, ๐Ÿ“ˆ OLS, ARIMA, VAR, ECM
8. Tariffs & Trade Networks Graph Databases Exploring the impact of Trump-era tariffs on global trade using advanced graph database techniques and network analysis. View ๐Ÿ Python, ๐Ÿ•ธ๏ธ Neo4j, ๐Ÿ”— Cypher
9. County Health & Voting Patterns EDA / Data Viz Analyzing the relationship between county health metrics and voting trends to uncover connections between public health and political behavior. View ๐Ÿ Python, ๐ŸŽจ Plotly, ๐Ÿ–ฅ๏ธ Dash, ๐Ÿ“Š Seaborn

๐Ÿ“ซ Connect With Me


Thank you for visiting my portfolio! Feel free to explore the projects above, open issues, or connect for collaboration opportunities.

About

My Data Science Portfolio: showcasing skills in data-driven discovery, analytics, and problem-solving through featured projects in data visualization, RAG, time series, and predictive modeling.

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