scholarly journals Incremental Updating of 3D Topological Maps to Describe Videos

Author(s):  
Guillaume Damiand ◽  
Sylvain Brandel ◽  
Donatello Conte
2014 ◽  
Vol 631-632 ◽  
pp. 49-52
Author(s):  
Yan Li ◽  
Jia Jia Hou ◽  
Xiao Qing Liu

Variable precision rough set (VPRS) based on dominance relation is an extension of traditional rough set by which can handle preference-ordered information flexibly. This paper focuses on the maintenance of approximations in dominance based VPRS when the objects in an information system vary over time. The incremental updating principles are given as inserting or deleting an object, and some experimental evaluations validates the effectiveness of the proposed method.


2021 ◽  
Vol 15 (3) ◽  
pp. 1-33
Author(s):  
Jingjing Wang ◽  
Wenjun Jiang ◽  
Kenli Li ◽  
Keqin Li

CANDECOMP/PARAFAC (CP) decomposition is widely used in various online social network (OSN) applications. However, it is inefficient when dealing with massive and incremental data. Some incremental CP decomposition (ICP) methods have been proposed to improve the efficiency and process evolving data, by updating decomposition results according to the newly added data. The ICP methods are efficient, but inaccurate because of serious error accumulation caused by approximation in the incremental updating. To promote the wide use of ICP, we strive to reduce its cumulative errors while keeping high efficiency. We first differentiate all possible errors in ICP into two types: the cumulative reconstruction error and the prediction error. Next, we formulate two optimization problems for reducing the two errors. Then, we propose several restarting strategies to address the two problems. Finally, we test the effectiveness in three typical dynamic OSN applications. To the best of our knowledge, this is the first work on reducing the cumulative errors of the ICP methods in dynamic OSNs.


2015 ◽  
Vol 14 (4) ◽  
pp. 508-547
Author(s):  
Lars Mjøset

Stein Rokkan (1921–1979) left behind him an unfinished, ambitious macro-historical research project aiming to explain mobilization sequences, democratic resilience, and party systems in 16 Western European countries. This article explicates the comparative methodology behind this project with reference to a philosophy of social science framework. The main features of the methodology are a series of intermediate, substantive, methodological elements in between formal theory (paradigms) and empirical observations. Each element is presented in detail: lists of variables, regional grid, typological-topological maps, and comparative case reconstructions. Problems due to under-specification of variables and ambiguities in Rokkan’s ideas about parsimonious systematizations are discussed, and two possible ways of revising the methodology are sketched. Among these, the contextualist option seems the most promising one.


2017 ◽  
Vol 72 ◽  
pp. 1-17 ◽  
Author(s):  
Leandro B. Marinho ◽  
Jefferson S. Almeida ◽  
João Wellington M. Souza ◽  
Victor Hugo C. Albuquerque ◽  
Pedro P. Rebouças Filho

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