Large-Scale Frequent Episode Mining from Complex Event Sequences with Hierarchies

2019 ◽  
Vol 10 (4) ◽  
pp. 1-26 ◽  
Author(s):  
Xiang Ao ◽  
Haoran Shi ◽  
Jin Wang ◽  
Luo Zuo ◽  
Hongwei Li ◽  
...  
Keyword(s):  
Large Scale ◽  
Event Sequences ◽  
Episode Mining ◽  
Frequent Episode ◽  
Frequent Episode Mining

scholarly journals Online Frequent Episode Mining

2015 ◽  
Author(s):  
Xiang Ao ◽  
Ping Luo ◽  
Chengkai Li ◽  
Fuzhen Zhuang ◽  
Qing He
Keyword(s):  
Episode Mining ◽  
Frequent Episode ◽  
Frequent Episode Mining

Frequent episode mining within the latest time windows over event streams

2013 ◽  
Vol 40 (1) ◽  
pp. 13-28 ◽  
Author(s):  
Shukuan Lin ◽  
Jianzhong Qiao ◽  
Ya Wang
Keyword(s):  
Time Windows ◽  
Episode Mining ◽  
Frequent Episode ◽  
Frequent Episode Mining

scholarly journals Multi-Source Data Stream Online Frequent Episode Mining

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 107465-107478
Author(s):  
Tao You ◽  
Yamin Li ◽  
Bingkun Sun ◽  
Chenglie Du
Keyword(s):  
Data Stream ◽  
Episode Mining ◽  
Source Data ◽  
Frequent Episode ◽  
Frequent Episode Mining

Automating Integration Testing of Large-Scale Publish/Subscribe Systems

2010 ◽  
pp. 140-163 ◽  
Author(s):  
Éric Piel ◽  
Alberto González ◽  
Hans-Gerhard Gross
Keyword(s):  
Large Scale ◽  
Unit Testing ◽  
Integration Testing ◽  
Data Types ◽  
Event Sequences ◽  
Data Flows ◽  
Complementary Techniques ◽  
Event Based ◽  
Runtime Testing

Publish/subscribe systems are event-based systems separated into several components which publish and subscribe events that correspond to data types. Testing each component individually is not sufficient for testing the whole system; it also requires testing the integration of those components together. In this chapter, first we identify the specificities and difficulties of integration testing of publish/subscribe systems. Afterwards, two different and complementary techniques to test the integration are presented. One is based on the random generation of a high number of event sequences and on generic oracles, in order to find a malfunctioning state of the system. The second one uses a limited number of predefined data-flows which must respect a precise behaviour, implementable with the same mechanism as unit-testing. As event-based systems are well fitted for runtime modification, the particularities of runtime testing are also introduced, and the usage in the context of integration testing is detailed. A case study presents an example of integration testing on a small system inspired by the systems used in the maritime safety and security domain.

Some comments about observations and image processing of comet 29P/Schwassmann-Wachmann 1

1999 ◽  
Vol 173 ◽  
pp. 243-248
Author(s):  
D. Kubáček ◽  
A. Galád ◽  
A. Pravda
Keyword(s):  
Image Processing ◽  
Large Scale ◽  
Harvard College ◽  
Oak Ridge ◽  
Large Scale Structures ◽  
Short Period Comet ◽  
Short Period ◽  
Scale Structures ◽  
Harvard College Observatory ◽  
Period Comet

AbstractUnusual short-period comet 29P/Schwassmann-Wachmann 1 inspired many observers to explain its unpredictable outbursts. In this paper large scale structures and features from the inner part of the coma in time periods around outbursts are studied. CCD images were taken at Whipple Observatory, Mt. Hopkins, in 1989 and at Astronomical Observatory, Modra, from 1995 to 1998. Photographic plates of the comet were taken at Harvard College Observatory, Oak Ridge, from 1974 to 1982. The latter were digitized at first to apply the same techniques of image processing for optimizing the visibility of features in the coma during outbursts. Outbursts and coma structures show various shapes.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

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