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TEAM

Graph Signal Processing for Data Prediction and Insight Extraction

Maksim Kosmakov, Daniel de la Riva Massaad, ARPITH Shanbhag, Chijioke Ifepe, Ali Bagheribardi

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The primary contribution of this project is the innovative transformation of a given dataset into a graph signal on either a directed or undirected graph domain. This transformation introduces a novel methodology for data prediction and the extraction of relevant, insightful information. By leveraging graph signal processing techniques, this approach significantly enhances data processing efficiency, scalability, and interpretability, supported by a robust theoretical framework that ensures effectiveness and adaptability to diverse datasets.

Graph-Based Framework and Edge Connection Mechanism
The proposed framework represents each data instance—comprising both numerical and categorical parameters—as a binary vector, whose dimensionality corresponds to the size of the dataset. This transformation enables the conversion of the dataset's rectangular matrix into an adjacency matrix, effectively establishing a graph structure that mirrors the relationships inherent in the original data.

A key innovation of this framework is the formulation of edge connections in the graph model, which is based on an adapted version of the K-Nearest Neighbors (KNN) algorithm. Specifically, edges are introduced between two cases in the dataset based on their similarity, ensuring that each case is connected to its most relevant neighbors. This adaptation addresses limitations of traditional KNN, such as sensitivity to noise and scalability issues, by incorporating domain-specific constraints and optimization techniques. The resulting graph structure not only preserves the intrinsic properties of the data but also facilitates the application of graph-theoretic algorithms and machine learning techniques to uncover hidden insights and improve predictive modeling.

Key Methodological Contributions
Graph Signal Processing: The project utilizes graph signal processing techniques to analyze and process data in the graph domain, enabling efficient extraction of insights and patterns.

Centrality Measures: The framework employs centrality measures—such as PageRank centrality, betweenness centrality, and others—to identify key cases (or nodes) in the dataset. These measures help pinpoint influential cases and those with potential for promotion.

Spectral Clustering: The dataset is decomposed into smaller, more manageable parts using spectral clustering, enabling targeted analysis and improving computational efficiency.

Practical Application: Competition-Based Datasets
As a specific application, this approach is designed to be implemented on datasets where cases (or entities) are in competition with one another. The primary objectives in this context are:

Identifying Influencers: Detecting cases that play a significant role in the dataset (e.g., influential entities in a network).

Promoting Targeted Cases: Highlighting cases with potential for promotion or growth by analyzing their positions and interactions within the graph.

Optimizing Interactions: Suggesting modifications to the interactions between cases—such as introducing new connections or inserting new cases—to reduce the dominance of influencers or create pathways for the promotion of targeted cases.

Broader Impact and Advantages
This project bridges the gap between traditional data analysis techniques and modern graph-based methodologies, offering a transformative solution for data-driven environments. The proposed framework provides several key advantages:

Enhanced Interpretability: The graph-based representation makes complex relationships and dependencies within the dataset more interpretable and visually accessible.

Improved Predictive Accuracy: By capturing non-linear relationships and interactions through the graph structure, the framework enhances the accuracy of predictive models.

Scalability and Robustness: The theoretical foundation ensures that the framework is scalable to large datasets and robust against noise and missing data.

Versatility: The approach is applicable to a wide range of domains, including social network analysis, bioinformatics, financial modeling, and recommendation systems.

Conclusion
By combining graph signal processing, centrality measures, and spectral clustering, this project offers a novel and powerful framework for data analysis and prediction. The outcomes of this research are expected to contribute significantly to both theoretical advancements and practical applications, paving the way for more efficient, insightful, and actionable data-driven decision-making.

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