Normalizing flows for flexible density estimation – Complete Phd and Masters Thesis

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Introduction

Normalizing flows have emerged as a powerful tool for flexible density estimation in recent years. These methods allow for the modeling of complex, multi-modal distributions by transforming a simple base distribution into the target distribution through a sequence of invertible mappings. This allows for the estimation of the density function of the target distribution, which has applications in areas such as generative modeling, anomaly detection, and uncertainty quantification.

Despite their effectiveness, normalizing flows are not without limitations. They can be computationally expensive, especially for high-dimensional data, and can be sensitive to the choice of transformation functions. Additionally, the scalability of normalizing flows to large datasets remains a challenge.

This thesis aims to address these limitations by investigating novel approaches to normalizing flows for flexible density estimation. The research will focus on exploring new architectures, optimization techniques, and regularization methods to improve the scalability, accuracy, and robustness of normalizing flow models.

Chapter 1: Introduction
1.1 Introduction
1.2 Background of study
1.3 Problem Statement
1.4 Objective of study
1.5 Limitation of study
1.6 Scope of study
1.7 Significance of study
1.8 Structure of the Thesis
1.9 Definition of Terms

Chapter 2: Literature Review
2.1 Overview of normalizing flows
2.2 Traditional density estimation methods
2.3 Applications of normalizing flows
2.4 Scalability challenges in normalizing flows
2.5 Optimization techniques for normalizing flows
2.6 Regularization methods for normalizing flows
2.7 Comparison of normalizing flow architectures
2.8 Recent advancements in normalizing flows
2.9 Evaluation metrics for normalizing flow models
2.10 Future directions in normalizing flow research

Chapter 3: System Design and Methodology
3.1 Data preprocessing
3.2 Selection of base distribution
3.3 Architecture design of normalizing flow model
3.4 Optimization algorithm selection
3.5 Regularization techniques implementation
3.6 Hyperparameter tuning
3.7 Evaluation metrics selection
3.8 Experimental setup

Chapter 4: System Implementation
4.1 Implementation of normalizing flow model
4.2 Training and validation procedures
4.3 Model evaluation
4.4 Comparison with baseline methods
4.5 Scalability analysis
4.6 Robustness analysis
4.7 Interpretability analysis
4.8 Computational complexity analysis

Chapter 5: Conclusion and Summary
5.1 Summary of findings
5.2 Contributions of the study
5.3 Implications for future research
5.4 Conclusion
5.5 Recommendations for practitioners

Thesis Overview on Normalizing Flows for Flexible Density Estimation

Normalizing flows have gained popularity in recent years as a flexible approach to density estimation. By transforming a simple base distribution through a series of invertible mappings, normalizing flows can model complex target distributions efficiently. However, existing approaches to normalizing flows still face challenges such as scalability and sensitivity to hyperparameters.

This thesis aims to address these challenges by exploring novel techniques and methodologies for improving the performance of normalizing flow models in flexible density estimation. The research will focus on designing new architectures, optimizing training procedures, and regularizing models to enhance scalability, accuracy, and robustness.

The thesis will begin with an introduction to normalizing flows, followed by a review of literature on traditional density estimation methods and recent advancements in normalizing flows. The system design and methodology chapter will detail the data preprocessing, model architecture, optimization algorithm, and regularization techniques used in the study.

The implementation chapter will describe the process of implementing the normalizing flow model, training and validating the model, and evaluating its performance. The conclusion chapter will summarize the findings, discuss the implications for future research, and provide recommendations for practitioners in the field.

Overall, this thesis aims to contribute to the advancement of normalizing flows for flexible density estimation by addressing key challenges and proposing innovative solutions to enhance the scalability and performance of these models.

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