Notes on providing a formal definition of equivalence

The rotating machineries in a factory usually have the characteristics of complex structure and highly automated logic, which generated a large amounts of monitoring data. It is an infeasible task for uses to deal with the massive data and locate fault timely. In this paper, we explore the causality between symptom and fault in the context of fault diagnosis in rotating machinery. We introduce data mining into fault diagnosis and provide a formal definition of causal diagnosis rule based on statistic test. A general framework for diagnosis rule discovery based on causality is provided and a simple implementation is explored with the purpose of providing some enlightenment to the application of causality discovery in fault diagnosis of rotating machinery.

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Time to Harmonize Dengue Nomenclature and Classification

Viruses ◽

10.3390/v10100569 ◽

2018 ◽

Vol 10 (10) ◽

pp. 569 ◽

Cited By ~ 4

Author(s):

Lize Cuypers ◽

Pieter Libin ◽

Peter Simmonds ◽

Ann Nowé ◽

Jorge Muñoz-Jordán ◽

...

Keyword(s):

Genetic Diversity ◽

Dengue Virus ◽

Classification System ◽

Formal Definition ◽

Classification Procedure ◽

Genotype 2 ◽

Global Spread ◽

Significant Burden ◽

Definition Of ◽

Epidemiological Characteristics

Dengue virus (DENV) is estimated to cause 390 million infections per year worldwide. A quarter of these infections manifest clinically and are associated with a morbidity and mortality that put a significant burden on the affected regions. Reports of increased frequency, intensity, and extended geographical range of outbreaks highlight the virus’s ongoing global spread. Persistent transmission in endemic areas and the emergence in territories formerly devoid of transmission have shaped DENV’s current genetic diversity and divergence. This genetic layout is hierarchically organized in serotypes, genotypes, and sub-genotypic clades. While serotypes are well defined, the genotype nomenclature and classification system lack consistency, which complicates a broader analysis of their clinical and epidemiological characteristics. We identify five key challenges: (1) Currently, there is no formal definition of a DENV genotype; (2) Two different nomenclature systems are used in parallel, which causes significant confusion; (3) A standardized classification procedure is lacking so far; (4) No formal definition of sub-genotypic clades is in place; (5) There is no consensus on how to report antigenic diversity. Therefore, we believe that the time is right to re-evaluate DENV genetic diversity in an essential effort to provide harmonization across DENV studies.

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Concepts of Augmented Image Space and Transformed Feature Space for Efficient Visual Servoing of an “Eye-in-Hand Robot”

Robotica ◽

10.1017/s0263574700010250 ◽

1991 ◽

Vol 9 (2) ◽

pp. 203-212 ◽

Cited By ~ 8

Author(s):

Won Jang ◽

Kyungjin Kim ◽

Myungjin Chung ◽

Zeungnam Bien

Keyword(s):

Visual Feedback ◽

Visual Servoing ◽

Industrial Robot ◽

Robot Vision ◽

Feature Space ◽

Image Features ◽

Image Space ◽

Formal Definition ◽

Computational Burden ◽

Definition Of

SUMMARYFor efficient visual servoing of an “eye-in-hand” robot, the concepts of Augmented Image Space and Transformed Feature Space are presented in the paper. A formal definition of image features as functionals is given along with a technique to use defined image features for visual servoing. Compared with other known methods, the proposed concepts reduce the computational burden for visual feedback, and enhance the flexibility in describing the vision-based task. Simulations and real experiments demonstrate that the proposed concepts are useful and versatile tools for the industrial robot vision tasks, and thus the visual servoing problem can be dealt with more systematically.

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