On the limited memory BFGS method for large scale optimization
Mathematical Programming: Series A and B
RoboCup-97: Robot Soccer World Cup I
RoboCup-97: Robot Soccer World Cup I
Conditional Random Fields: Probabilistic Models for Segmenting and Labeling Sequence Data
ICML '01 Proceedings of the Eighteenth International Conference on Machine Learning
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Shallow parsing with conditional random fields
NAACL '03 Proceedings of the 2003 Conference of the North American Chapter of the Association for Computational Linguistics on Human Language Technology - Volume 1
Conditional Random Fields for Contextual Human Motion Recognition
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision - Volume 2
Combining discriminative features to infer complex trajectories
ICML '06 Proceedings of the 23rd international conference on Machine learning
Robust recognition of physical team behaviors using spatio-temporal models
AAMAS '06 Proceedings of the fifth international joint conference on Autonomous agents and multiagent systems
Role-based teamwork activity recognition in observations of embodied agent actions
Proceedings of the 7th international joint conference on Autonomous agents and multiagent systems - Volume 2
Real world activity recognition with multiple goals
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Learning Discriminative Sequence Models from Partially Labelled Data for Activity Recognition
PRICAI '08 Proceedings of the 10th Pacific Rim International Conference on Artificial Intelligence: Trends in Artificial Intelligence
An algorithm for analyzing personalized online commercial intention
Proceedings of the 2nd International Workshop on Data Mining and Audience Intelligence for Advertising
A method for automatic POS guessing of Chinese unknown words
COLING '08 Proceedings of the 22nd International Conference on Computational Linguistics - Volume 1
CIGAR: concurrent and interleaving goal and activity recognition
AAAI'08 Proceedings of the 23rd national conference on Artificial intelligence - Volume 3
Feature selection for activity recognition in multi-robot domains
AAAI'08 Proceedings of the 23rd national conference on Artificial intelligence - Volume 3
Cross-domain activity recognition
Proceedings of the 11th international conference on Ubiquitous computing
Review: The use of pervasive sensing for behaviour profiling - a survey
Pervasive and Mobile Computing
Context-aware middleware for pervasive elderly homecare
IEEE Journal on Selected Areas in Communications - Special issue on wireless and pervasive communications for healthcare
Activity recognition: linking low-level sensors to high-level intelligence
IJCAI'09 Proceedings of the 21st international jont conference on Artifical intelligence
Abnormal activity recognition based on HDP-HMM models
IJCAI'09 Proceedings of the 21st international jont conference on Artifical intelligence
An unsupervised approach to activity recognition and segmentation based on object-use fingerprints
Data & Knowledge Engineering
Learning to recognize complex actions using conditional random fields
ISVC'07 Proceedings of the 3rd international conference on Advances in visual computing - Volume Part II
Activity recognition using semi-Markov models on real world smart home datasets
Journal of Ambient Intelligence and Smart Environments
From dialogue management to pervasive interaction based assistive technology
Proceedings of the 3rd International Conference on PErvasive Technologies Related to Assistive Environments
An activity monitoring system for elderly care using generative and discriminative models
Personal and Ubiquitous Computing
Conditional random fields for activity recognition in smart environments
Proceedings of the 1st ACM International Health Informatics Symposium
Mining and monitoring patterns of daily routines for assisted living in real world settings
Proceedings of the 1st ACM International Health Informatics Symposium
Building digital life stories for memory support
International Journal of Computers in Healthcare
Inferring user search intention based on situation analysis of the physical world
UIC'10 Proceedings of the 7th international conference on Ubiquitous intelligence and computing
IEA/AIE'10 Proceedings of the 23rd international conference on Industrial engineering and other applications of applied intelligent systems - Volume Part I
Activity sequence modelling and dynamic clustering for personalized e-learning
User Modeling and User-Adapted Interaction
Cross-domain activity recognition via transfer learning
Pervasive and Mobile Computing
Recognizing multi-user activities using wearable sensors in a smart home
Pervasive and Mobile Computing
Activity inference for rfid-based assisted living applications
Journal of Mobile Multimedia
Dynamic multi-component based activity detection and recognition within smart homes
Proceedings of the 2011 international workshop on Situation activity & goal awareness
HMM based semi-supervised learning for activity recognition
Proceedings of the 2011 international workshop on Situation activity & goal awareness
GPARS: a general-purpose activity recognition system
Applied Intelligence
Semi-Markov conditional random fields for accelerometer-based activity recognition
Applied Intelligence
Collaborative activity recognition via check-in history
Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks
Review: Situation identification techniques in pervasive computing: A review
Pervasive and Mobile Computing
Agent-oriented incremental team and activity recognition
IJCAI'11 Proceedings of the Twenty-Second international joint conference on Artificial Intelligence - Volume Volume Two
Fusion of multiple features and supervised learning for Chinese OOV term detection and POS guessing
IJCAI'11 Proceedings of the Twenty-Second international joint conference on Artificial Intelligence - Volume Volume Three
Transfer learning for activity recognition via sensor mapping
IJCAI'11 Proceedings of the Twenty-Second international joint conference on Artificial Intelligence - Volume Volume Three
User-dependent aspect model for collaborative activity recognition
IJCAI'11 Proceedings of the Twenty-Second international joint conference on Artificial Intelligence - Volume Volume Three
Event processing under uncertainty
Proceedings of the 6th ACM International Conference on Distributed Event-Based Systems
Mining recent temporal patterns for event detection in multivariate time series data
Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining
Predicting future locations with hidden Markov models
Proceedings of the 2012 ACM Conference on Ubiquitous Computing
Towards the detection of unusual temporal events during activities using HMMs
Proceedings of the 2012 ACM Conference on Ubiquitous Computing
Pervasive and Mobile Computing
Online activity recognition using evolving classifiers
Expert Systems with Applications: An International Journal
Incremental behavior modeling and suspicious activity detection
Pattern Recognition
A hybrid HMM/ANN model for activity recognition in the home using binary sensors
IWAAL'12 Proceedings of the 4th international conference on Ambient Assisted Living and Home Care
Proceedings of the First ACM SIGSPATIAL International Workshop on Mobile Geographic Information Systems
Discrete relative states to learn and recognize goals-based behaviors of groups
Proceedings of the 2013 international conference on Autonomous agents and multi-agent systems
ACM Transactions on Intelligent Systems and Technology (TIST) - Survey papers, special sections on the semantic adaptive social web, intelligent systems for health informatics, regular papers
A survey on ontologies for human behavior recognition
ACM Computing Surveys (CSUR)
Latent-Dynamic Conditional Random Fields for recognizing activities in smart homes
Journal of Ambient Intelligence and Smart Environments - Ambient and Smart Component Technologies for Human Centric Computing
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Activity recognition is a key component for creating intelligent, multi-agent systems. Intrinsically, activity recognition is a temporal classification problem. In this paper, we compare two models for temporal classification: hidden Markov models (HMMs), which have long been applied to the activity recognition problem, and conditional random fields (CRFs). CRFs are discriminative models for labeling sequences. They condition on the entire observation sequence, which avoids the need for independence assumptions between observations. Conditioning on the observations vastly expands the set of features that can be incorporated into the model without violating its assumptions. Using data from a simulated robot tag domain, chosen because it is multi-agent and produces complex interactions between observations, we explore the differences in performance between the discriminatively trained CRF and the generative HMM. Additionally, we examine the effect of incorporating features which violate independence assumptions between observations; such features are typically necessary for high classification accuracy. We find that the discriminatively trained CRF performs as well as or better than an HMM even when the model features do not violate the independence assumptions of the HMM. In cases where features depend on observations from many time steps, we confirm that CRFs are robust against any degradation in performance.