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In this paper a new dissimilarity measure to identify groups of assets dynamics is proposed. The underlying generating process is assumed to be a diffusion process solution of stochastic differential equations and observed at discrete time.…

统计金融 · 定量金融 2008-12-02 Alessandro De Gregorio , Stefano Maria Iacus

In this paper we consider the filtering of partially observed multi-dimensional diffusion processes that are observed regularly at discrete times. We assume that, for numerical reasons, one has to time-discretize the diffusion process which…

统计计算 · 统计学 2023-02-21 Ajay Jasra , Mohamed Maama , Hernando Ombao

We present a technique for estimating the similarity between objects such as movies or foods whose proper representation depends on human perception. Our technique combines a modest number of human similarity assessments to infer a pairwise…

人工智能 · 计算机科学 2018-02-19 Jesse Anderton , Pavel Metrikov , Virgil Pavlu , Javed Aslam

This work proposes a novel framework for visual tracking based on the integration of an iterative particle filter, a deep convolutional neural network, and a correlation filter. The iterative particle filter enables the particles to correct…

计算机视觉与模式识别 · 计算机科学 2023-01-05 Reza Jalil Mozhdehi , Henry Medeiros

Spatial and temporal stream model has gained great success in video action recognition. Most existing works pay more attention to designing effective features fusion methods, which train the two-stream model in a separate way. However, it's…

计算机视觉与模式识别 · 计算机科学 2019-08-28 Jingran Zhang , Fumin Shen , Xing Xu , Heng Tao Shen

Recommender systems are often designed based on a collaborative filtering approach, where user preferences are predicted by modelling interactions between users and items. Many common approaches to solve the collaborative filtering task are…

机器学习 · 计算机科学 2021-10-11 Yinchong Yang , Florian Buettner

Collaborative filtering generates recommendations by exploiting user-item similarities based on rating data, which often contains numerous unrated items. To predict scores for unrated items, matrix factorization techniques such as…

统计力学 · 物理学 2025-07-30 Yukino Terui , Yuka Inoue , Yohei Hamakawa , Kosuke Tatsumura , Kazue Kudo

The present work proposes the concept of induced percolation over multiple-object systems, so that features such as the number of merged clusters can be used as a relevant measurement. The suggested approach involves the expansion of the…

无序系统与神经网络 · 物理学 2007-05-23 Luciano da Fontoura Costa

Graph-based collaborative filtering has been established as a prominent approach in recommendation systems, leveraging the inherent graph topology of user-item interactions to model high-order connectivity patterns and enhance…

信息检索 · 计算机科学 2025-03-21 Fan Huang , Wei Wang

We propose a streaming algorithm for the binary classification of data based on crowdsourcing. The algorithm learns the competence of each labeller by comparing her labels to those of other labellers on the same tasks and uses this…

机器学习 · 统计学 2016-02-24 Thomas Bonald , Richard Combes

In the domain of intelligent transportation systems (ITS), collaborative perception has emerged as a promising approach to overcome the limitations of individual perception by enabling multiple agents to exchange information, thus enhancing…

多智能体系统 · 计算机科学 2023-05-04 Ahmed N. Ahmed , Siegfried Mercelis , Ali Anwar

Optical microscopy and multi-particle tracking are used to investigate the cross-correlated diffusion of quasi two-dimensional (2D) colloidal particles near an oil-water interface. It is shown that the effect of the interface on correlated…

软凝聚态物质 · 物理学 2015-06-15 Wei Zhang , Song Chen , Na Li , Jiazheng Zhang , Wei Chen

Sequential recommendation aims to infer user preferences from historical interaction sequences and predict the next item that users may be interested in the future. The current mainstream design approach is to represent items as fixed…

信息检索 · 计算机科学 2023-12-21 Yong Niu , Xing Xing , Zhichun Jia , Ruidi Liu , Mindong Xin

Despite the prevalence of collaborative filtering in recommendation systems, there has been little theoretical development on why and how well it works, especially in the "online" setting, where items are recommended to users over time. We…

机器学习 · 计算机科学 2014-11-25 Guy Bresler , George H. Chen , Devavrat Shah

Feedback particle filter (FPF) is a numerical algorithm to approximate the solution of the nonlinear filtering problem in continuous-time settings. In any numerical implementation of the FPF algorithm, the main challenge is to numerically…

最优化与控制 · 数学 2019-10-01 Amirhossein Taghvaei , Prashant G. Mehta , Sean P. Meyn

Collaborative filtering is a popular technique to infer users' preferences on new content based on the collective information of all users preferences. Recommender systems then use this information to make personalized suggestions to users.…

社会与信息网络 · 计算机科学 2017-03-06 Ayan Sinha , David F. Gleich , Karthik Ramani

This paper introduces a novel graph signal processing framework for building graph-based models from classes of filtered signals. In our framework, graph-based modeling is formulated as a graph system identification problem, where the goal…

机器学习 · 计算机科学 2018-03-08 Hilmi E. Egilmez , Eduardo Pavez , Antonio Ortega

Collaborative Filtering (CF), the most common approach to build Recommender Systems, became pervasive in our daily lives as consumers of products and services. However, challenges limit the effectiveness of Collaborative Filtering…

信息检索 · 计算机科学 2022-11-16 Miguel G. Silva , Rui Henriques , Sara C. Madeira

User cooperation is a well-known approach to achieve diversity without multiple antennas, however at the cost of inevitable loss of rate mostly due to the need of additional channels for relaying. A new collaborative diversity scheme is…

信息论 · 计算机科学 2011-03-01 Indu Shakya , Falah H. Ali , Elias Stipidis

The growth of Internet commerce has stimulated the use of collaborative filtering (CF) algorithms as recommender systems. Such systems leverage knowledge about the known preferences of multiple users to recommend items of interest to other…

信息检索 · 计算机科学 2013-01-18 David M. Pennock , Eric J. Horvitz , Steve Lawrence , C. Lee Giles