Multi-behavior recommendation methods leverage various types of user interaction behaviors to make personalized recommendations.Behavior paths formed by diverse user interactions reveal distinctive patterns between us...Multi-behavior recommendation methods leverage various types of user interaction behaviors to make personalized recommendations.Behavior paths formed by diverse user interactions reveal distinctive patterns between users and items.Modeling these behavioral paths captures multidimensional behavioral features,which enables accurate learning of user preferences and improves recommendation accuracy.However,existing methods share two critical limitations:(1)Lack of modeling for the diversity of behavior paths;(2)Ignoring the impact of item attribute information on user behavior paths.To address these issues,we propose a Directed Behavior path graph-based Multi-behavior Recommendation method(DBMR).Specifically,we first construct a directed user-item behavior path graph based on diverse behavior chains.For each behavior,we then build a user-item interaction graph and use a LightGCN model with residual design to learn user and item embeddings.Next,we introduce a graph attention message aggregator that integrates features from previous behaviors into the learning of the next behavior,weighted by the transition strength between behaviors.Finally,we compute the recommendation score from the user preference and item representations under the target behavior.We adopt a joint optimization framework with a multi-task learning strategy,which accounts for each auxiliary behavior’s contribution to target behavior prediction.Additionally,an auxiliary loss measures the difference between item embeddings from behavior paths and those from an attribute-feature encoder,thereby capturing multidimensional item features and refining recommendation results.Experiments on two real-world datasets demonstrate the effectiveness of our method in utilizing multi-behavior data.展开更多
The problem of the unmanned surface vessel (USV) path planning in static and dynamic obstacle environments is addressed in this paper. Multi-behavior fusion based potential field method is proposed, which contains thr...The problem of the unmanned surface vessel (USV) path planning in static and dynamic obstacle environments is addressed in this paper. Multi-behavior fusion based potential field method is proposed, which contains three behaviors: goal-seeking, boundary-memory following and dynamic-obstacle avoidance. Then, different activation conditions are designed to determine the current behavior. Meanwhile, information on the positions, velocities and the equation of motion for obstacles are detected and calculated by sensor data. Besides, memory information is introduced into the boundary following behavior to enhance cognition capability for the obstacles, and avoid local minima problem caused by the potential field method. Finally, the results of theoretical analysis and simulation show that the collision-free path can be generated for USV within different obstacle environments, and further validated the performance and effectiveness of the presented strategy.展开更多
基金supported by the Key Research and Development Programof China(Grant No.2022YFB3102904).
摘要Multi-behavior recommendation methods leverage various types of user interaction behaviors to make personalized recommendations.Behavior paths formed by diverse user interactions reveal distinctive patterns between users and items.Modeling these behavioral paths captures multidimensional behavioral features,which enables accurate learning of user preferences and improves recommendation accuracy.However,existing methods share two critical limitations:(1)Lack of modeling for the diversity of behavior paths;(2)Ignoring the impact of item attribute information on user behavior paths.To address these issues,we propose a Directed Behavior path graph-based Multi-behavior Recommendation method(DBMR).Specifically,we first construct a directed user-item behavior path graph based on diverse behavior chains.For each behavior,we then build a user-item interaction graph and use a LightGCN model with residual design to learn user and item embeddings.Next,we introduce a graph attention message aggregator that integrates features from previous behaviors into the learning of the next behavior,weighted by the transition strength between behaviors.Finally,we compute the recommendation score from the user preference and item representations under the target behavior.We adopt a joint optimization framework with a multi-task learning strategy,which accounts for each auxiliary behavior’s contribution to target behavior prediction.Additionally,an auxiliary loss measures the difference between item embeddings from behavior paths and those from an attribute-feature encoder,thereby capturing multidimensional item features and refining recommendation results.Experiments on two real-world datasets demonstrate the effectiveness of our method in utilizing multi-behavior data.
基金financially supported by the National Natural Science Foundation of China(Grant No.51879049)DK-I Dynamic Positioning System Console Project
摘要The problem of the unmanned surface vessel (USV) path planning in static and dynamic obstacle environments is addressed in this paper. Multi-behavior fusion based potential field method is proposed, which contains three behaviors: goal-seeking, boundary-memory following and dynamic-obstacle avoidance. Then, different activation conditions are designed to determine the current behavior. Meanwhile, information on the positions, velocities and the equation of motion for obstacles are detected and calculated by sensor data. Besides, memory information is introduced into the boundary following behavior to enhance cognition capability for the obstacles, and avoid local minima problem caused by the potential field method. Finally, the results of theoretical analysis and simulation show that the collision-free path can be generated for USV within different obstacle environments, and further validated the performance and effectiveness of the presented strategy.