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- research-articleFebruary 2025
On Graph Representation for Attributed Hypergraph Clustering
Proceedings of the ACM on Management of Data (PACMMOD), Volume 3, Issue 1Article No.: 59, Pages 1–26https://doi.org/10.1145/3709741Attributed Hypergraph Clustering (AHC) aims at partitioning a hypergraph into clusters such that nodes in the same cluster are close to each other with both high connectedness and homogeneous attributes. Existing AHC methods are all based on matrix ...
- research-articleFebruary 2025
Bursting Flow Query on Large Temporal Flow Networks
Proceedings of the ACM on Management of Data (PACMMOD), Volume 3, Issue 1Article No.: 18, Pages 1–26https://doi.org/10.1145/3709737Recently, queries that find bursting patterns in temporal graph data have received increasing research attention. In particular, finding the flow in temporal networks whose flow values are bursting in a time interval has numerous applications, such as ...
- research-articleFebruary 2025
Efficiently Counting Triangles in Large Temporal Graphs
Proceedings of the ACM on Management of Data (PACMMOD), Volume 3, Issue 1Article No.: 38, Pages 1–27https://doi.org/10.1145/3709688In many real-world applications (e.g., email networks, social networks, and phone call networks), the relationships between entities can be modeled as a temporal graph, in which each edge is associated with a timestamp representing the interaction time. ...
- research-articleFebruary 2025
Efficient Maximum s-Bundle Search via Local Vertex Connectivity
Proceedings of the ACM on Management of Data (PACMMOD), Volume 3, Issue 1Article No.: 37, Pages 1–27https://doi.org/10.1145/3709687The s-bundle, as a cohesive subgraph model which relaxes the clique, remains connected whenever fewer than n-s vertices are removed, where n is the number of vertices inside. Finding the largest s-bundle is a fundamental problem and has diverse ...
- research-articleFebruary 2025
Computing Approximate Graph Edit Distance via Optimal Transport
Proceedings of the ACM on Management of Data (PACMMOD), Volume 3, Issue 1Article No.: 23, Pages 1–26https://doi.org/10.1145/3709673Given a graph pair (G1, G2), graph edit distance (GED) is defined as the minimum number of edit operations converting G1 to G2. GED is a fundamental operation widely used in many applications, but its exact computation is NP-hard, so the approximation of ...
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- research-articleFebruary 2025
A Local Search Approach to Efficient (k,p)-Core Maintenance
Proceedings of the ACM on Management of Data (PACMMOD), Volume 3, Issue 1Article No.: 4, Pages 1–26https://doi.org/10.1145/3709654The ((k,p))-core model was recently proposed to capture engagement dynamics by considering both intra-community interactions (i.e., the k-core structure) and inter-community interactions (i.e., the p-fraction property). It is a refinement of the classic ...
- research-articleDecember 2024
Provenance-Enabled Explainable AI
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 6Article No.: 250, Pages 1–27https://doi.org/10.1145/3698826Machine learning (ML) algorithms have advanced significantly in recent years, progressively evolving into artificial intelligence (AI) agents capable of solving complex, human-like intellectual challenges. Despite the advancements, the interpretability ...
- research-articleDecember 2024
Connectivity-Oriented Property Graph Partitioning for Distributed Graph Pattern Query Processing
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 6Article No.: 229, Pages 1–26https://doi.org/10.1145/3698804Graph pattern query is a powerful tool for extracting crucial information from property graphs. With the exponential growth of sizes, property graphs are typically divided into multiple subgraphs (referred to as partitions) and stored across various ...
- research-articleDecember 2024
An Efficient and Exact Algorithm for Locally h-Clique Densest Subgraph Discovery
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 6Article No.: 225, Pages 1–26https://doi.org/10.1145/3698800Detecting locally, non-overlapping, near-clique densest subgraphs is a crucial problem for community search in social networks. As a vertex may be involved in multiple overlapped local cliques, detecting locally densest sub-structures considering h-...
- research-articleSeptember 2024
GABoost: Graph Alignment Boosting via Local Optimum Escape
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 4Article No.: 199, Pages 1–26https://doi.org/10.1145/3677135Heterogeneous graphs provide a universal data structure for representing various kinds of structured data in numerous domains. The graph alignment problem aims to find the correspondences of vertices in different graphs, playing a fundamental role in ...
- research-articleMay 2024
PimPam: Efficient Graph Pattern Matching on Real Processing-in-Memory Hardware
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 3Article No.: 161, Pages 1–25https://doi.org/10.1145/3654964Graph pattern matching is powerful and widely applicable to many application domains. Despite the recent algorithm advances, matching patterns in large-scale real-world graphs still faces the memory access bottleneck on conventional computing systems. ...
- research-articleMay 2024
On Efficient Large Sparse Matrix Chain Multiplication
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 3Article No.: 156, Pages 1–27https://doi.org/10.1145/3654959Sparse matrices are often used to model the interactions among different objects and they are prevalent in many areas including e-commerce, social network, and biology. As one of the fundamental matrix operations, the sparse matrix chain multiplication (...
- research-articleMay 2024
Consistency of Relations over Monoids
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 2Article No.: 107, Pages 1–15https://doi.org/10.1145/3651608The interplay between local consistency and global consistency has been the object of study in several different areas, including probability theory, relational databases, and quantum information. For relational databases, Beeri, Fagin, Maier, and ...
- research-articleMay 2024
Distinct Shortest Walk Enumeration for RPQs
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 2Article No.: 100, Pages 1–22https://doi.org/10.1145/3651601We consider the Distinct Shortest Walks problem. Given two vertices s and t of a graph database D and a regular path query, we want to enumerate all walks of minimal length from s to t that carry a label that conforms to the query. Usual theoretical ...
- research-articleMay 2024
On Density-based Local Community Search
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 2Article No.: 88, Pages 1–25https://doi.org/10.1145/3651589Local community search (LCS) finds a community in a given graph G local to a set R of seed nodes by optimizing an objective function. The objective function f(S) for an induced subgraph S encodes the set inclusion criteria of R to a classic community ...
- research-articleMay 2024
The Weisfeiler-Leman Dimension of Conjunctive Queries
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 2Article No.: 86, Pages 1–17https://doi.org/10.1145/3651587A graph parameter is a function f on graphs with the property that, for any pair of isomorphic graphs G1 and G2, f(G1)=f(G2). The Weisfeiler--Leman (WL) dimension of f is the minimum k such that, if G1 and G2 are indistinguishable by the k-dimensional WL-...
- research-articleMarch 2024
Efficient k-Clique Listing: An Edge-Oriented Branching Strategy
Proceedings of the ACM on Management of Data (PACMMOD), Volume 2, Issue 1Article No.: 7, Pages 1–26https://doi.org/10.1145/3639262k-clique listing is a vital graph mining operator with diverse applications in various networks. The state-of-the-art algorithms all adopt a branch-and-bound (BB) framework with a vertex-oriented branching strategy (called VBBkC), which forms a sub-...
- research-articleDecember 2023
Hierarchical Cut Labelling - Scaling Up Distance Queries on Road Networks
Proceedings of the ACM on Management of Data (PACMMOD), Volume 1, Issue 4Article No.: 244, Pages 1–25https://doi.org/10.1145/3626731Answering the shortest-path distance between two arbitrary locations is a fundamental problem in road networks. Labelling-based solutions are the current state-of-the-arts to render fast response time, which can generally be categorised into hub-based ...
- research-articleNovember 2023
Modularity-based Hypergraph Clustering: Random Hypergraph Model, Hyperedge-cluster Relation, and Computation
Proceedings of the ACM on Management of Data (PACMMOD), Volume 1, Issue 3Article No.: 215, Pages 1–25https://doi.org/10.1145/3617335A graph models the connections among objects. One important graph analytical task is clustering which partitions a data graph into clusters with dense innercluster connections. A line of clustering maximizes a function called modularity. Modularity-based ...
- research-articleNovember 2023
Fast Maximal Quasi-clique Enumeration: A Pruning and Branching Co-Design Approach
Proceedings of the ACM on Management of Data (PACMMOD), Volume 1, Issue 3Article No.: 211, Pages 1–26https://doi.org/10.1145/3617331Mining cohesive subgraphs from a graph is a fundamental problem in graph data analysis. One notable cohesive structure is γ-quasi-clique (QC), where each vertex connects at least a fraction γ of the other vertices inside. Enumerating maximal γ-quasi-...