scholarly journals Optimal Bayesian smoothing of functional observations over a large graph

2021 ◽  
pp. 104876
Author(s):  
Arkaprava Roy ◽  
Subhashis Ghosal
2006 ◽  
Vol 26 (1) ◽  
pp. 212-229 ◽  
Author(s):  
Erik A. Sauleau ◽  
Andrea Hennerfeind ◽  
Antoine Buemi ◽  
Leonhard Held

2013 ◽  
Author(s):  
Paolo Addesso ◽  
Fulvio Capodici ◽  
Guido D'Urso ◽  
Maurizio Longo ◽  
Antonino Maltese ◽  
...  

Distributed System, plays a vital role in Frequent Subgraph Mining (FSM) to extract frequent subgraph from Large Graph database. It help to reduce in memory requirements, computational costs as well as increase in data security by distributing resources across distributed sites, which may be homogeneous or heterogeneous. In this paper, we focus on the problem related complexity of data arises in centralized system by using MapReduce framework. We proposed a MapReduced based Optimized Frequent Subgrph Mining (MOFSM) algorithm in MapReduced framework for large graph database. We also compare our algorithm with existing methods using four real-world standard datasets to verify that better solution with respect to performance and scalability of algorithm. These algorithms are used to extract subgraphs in distributed system which is important in real-world applications, such as computer vision, social network analysis, bio-informatics, financial and transportation network.


2021 ◽  
Author(s):  
Xian Yang ◽  
Shuo Wang ◽  
Yuting Xing ◽  
Ling Li ◽  
Richard Yi Da Xu ◽  
...  

Abstract In epidemiological modelling, the instantaneous reproduction number, Rt, is important to understand the transmission dynamics of infectious diseases. Current Rt estimates often suffer from problems such as lagging, averaging and uncertainties demoting the usefulness of Rt. To address these problems, we propose a new method in the framework of sequential Bayesian inference where a Data Assimilation approach is taken for Rt estimation, resulting in the state-of-the-art ‘DARt’ system for Rt estimation. With DARt, the problem of time misalignment caused by lagging observations is tackled by incorporating observation delays into the joint inference of infections and Rt; the drawback of averaging is improved by instantaneous updating upon new observations and a model selection mechanism capturing abrupt changes caused by interventions; the uncertainty is quantified and reduced by employing Bayesian smoothing. We validate the performance of DARt through simulations and demonstrate its power in revealing the transmission dynamics of COVID-19.


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