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Frequent episode discovery is a popular framework for pattern discovery in event streams. An episode is a partially ordered set of nodes with each node associated with an event type. Efficient (and separate) algorithms exist for episode…

Artificial Intelligence · Computer Science 2009-12-11 Avinash Achar , Srivatsan Laxman , Raajay Viswanathan , P. S. Sastry

Clustering is crucial for many computer vision applications such as robust tracking, object detection and segmentation. This work presents a real-time clustering technique that takes advantage of the unique properties of event-based vision…

Robotics · Computer Science 2018-07-11 Francisco Barranco , Cornelia Fermuller , Eduardo Ros

Active learning is an important technique for low-resource sequence labeling tasks. However, current active sequence labeling methods use the queried samples alone in each iteration, which is an inefficient way of leveraging human…

Computation and Language · Computer Science 2020-10-07 Rongzhi Zhang , Yue Yu , Chao Zhang

In this paper we present a novel probabilistic sampling-based motion planning algorithm called the Fast Marching Tree algorithm (FMT*). The algorithm is specifically aimed at solving complex motion planning problems in high-dimensional…

Robotics · Computer Science 2015-02-09 Lucas Janson , Edward Schmerling , Ashley Clark , Marco Pavone

The one of the most time consuming steps for association rule mining is the computation of the frequency of the occurrences of itemsets in the database. The hash table index approach converts a transaction database to an hash index tree by…

Databases · Computer Science 2011-11-14 R. B. Geeta , Omkar Mamillapalli , Shasikumar G. Totad , Prasad Reddy P. V. G. D

Policy-gradient methods are widely used for learning control policies. They can be easily distributed to multiple workers and reach state-of-the-art results in many domains. Unfortunately, they exhibit large variance and subsequently suffer…

Machine Learning · Computer Science 2022-09-29 Gal Dalal , Assaf Hallak , Shie Mannor , Gal Chechik

False-positives are a problem in anomaly-based intrusion detection systems. To counter this issue, we discuss anomaly detection for the eXtensible Markup Language (XML) in a language-theoretic view. We argue that many XML-based attacks…

Cryptography and Security · Computer Science 2013-11-13 Harald Lampesberger

Events describe the state changes of entities. In a document, multiple events are connected by various relations (e.g., Coreference, Temporal, Causal, and Subevent). Therefore, obtaining the connections between events through Event-Event…

Computation and Language · Computer Science 2024-03-20 Haochen Li , Di Geng

While Large Language Models (LLMs) have empowered AI research agents to perform isolated scientific tasks, automating complex, real-world workflows, such as LLM training, remains a significant challenge. In this paper, we introduce TREX, a…

Artificial Intelligence · Computer Science 2026-04-23 Zerun Ma , Guoqiang Wang , Xinchen Xie , Yicheng Chen , He Du , Bowen Li , Yanan Sun , Wenran Liu , Kai Chen , Yining Li

Document-level event extraction aims to recognize event information from a whole piece of article. Existing methods are not effective due to two challenges of this task: a) the target event arguments are scattered across sentences; b) the…

Computation and Language · Computer Science 2021-06-01 Runxin Xu , Tianyu Liu , Lei Li , Baobao Chang

We investigate ways to support interactive mining sessions, in the setting of association rule mining. In such sessions, users specify conditions (queries) on the associations to be generated. Our approach is a combination of the…

Databases · Computer Science 2007-05-23 Bart Goethals , Jan Van den Bussche

Three approaches to content-and-structure XML retrieval are analysed in this paper: first by using Zettair, a full-text information retrieval system; second by using eXist, a native XML database, and third by using a hybrid XML retrieval…

Information Retrieval · Computer Science 2007-05-23 Jovan Pehcevski , James A. Thom , Anne-Marie Vercoustre

The monitoring of event frequencies can be used to recognize behavioral anomalies, to identify trends, and to deduce or discard hypotheses about the underlying system. For example, the performance of a web server may be monitored based on…

Logic in Computer Science · Computer Science 2020-01-13 Thomas Ferrère , Thomas A. Henzinger , Bernhard Kragl

The embedding-based retrieval (EBR) approach is widely used in mainstream search engine retrieval systems and is crucial in recent retrieval-augmented methods for eliminating LLM illusions. However, existing EBR models often face the…

Computation and Language · Computer Science 2024-04-10 Yanan Zhang , Xiaoling Bai , Tianhua Zhou

Humans learn from the occurrence of events in a different place and time to predict similar trajectories of events. We define Loosely Decoupled Timeseries (LDT) phenomena as two or more events that could happen in different places and…

Machine Learning · Computer Science 2022-08-29 Christian Manasseh , Razvan Veliche , Jared Bennett , Hamilton Clouse

In this paper we study how to efficiently compute \textit{frequent co-occurring terms} (FCT) in the results of a keyword query in parallel using the popular MapReduce framework. Taking as input a keyword query q and an integer k, an FCT…

Databases · Computer Science 2013-01-14 Jianxin Li , Chengfei Liu , Liang Yao , Jeffrey Xu Yu , Rui Zhou

Frequent itemset mining has emerged as a fundamental problem in data mining and plays an important role in many data mining tasks, such as association analysis, classification, etc. In the framework of frequent itemset mining, the results…

Databases · Computer Science 2015-12-25 Zhi-Hong Deng

To enable data aggregation among the event sources in wireless sensor networks and to reduce the communication cost there is a need to establish a coveraged tree structure inside any given event region to allow data reports to be aggregated…

Networking and Internet Architecture · Computer Science 2013-01-23 Deepali Virmani , Satbir Jain

We propose scalable methods to execute counting queries in machine learning applications. To achieve memory and computational efficiency, we abstract counting queries and their context such that the counts can be aggregated as a stream. We…

Machine Learning · Statistics 2019-01-09 Subhadeep Karan , Matthew Eichhorn , Blake Hurlburt , Grant Iraci , Jaroslaw Zola

We proposed a data-driven approach to dissect multivariate time series in order to discover multiple phases underlying dynamics of complex systems. This computing approach is developed as a multiple-dimension version of Hierarchical Factor…

Methodology · Statistics 2021-03-09 Xiaodong Wang , Fushing Hsieh
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