scholarly journals Study on the Correction of S-N Distribution in the Welding Fatigue Analysis Method Based on the Battelle Equivalent Structural Stress by Rough Set Theory

2014 ◽  
Vol 60 (9) ◽  
pp. 600-606 ◽  
Author(s):  
Yibo Sun ◽  
Xinhua Yang
Keyword(s):  
Set Theory ◽  
Rough Set ◽  
Rough Set Theory ◽  
Fatigue Analysis ◽  
Structural Stress ◽  
Analysis Method ◽  
N Distribution

The Application of Data Mining in the Civil Aviation Accident Analysis

2012 ◽  
Vol 241-244 ◽  
pp. 3000-3004
Author(s):  
Dai Wu Zhu ◽  
Yin Ni
Keyword(s):  
Data Mining ◽  
Set Theory ◽  
Rough Set ◽  
Rough Set Theory ◽  
Attribute Reduction ◽  
Passive State ◽  
Civil Aviation ◽  
Accident Analysis ◽  
Analysis Method ◽  
Accident Prediction

At present, our analysis of the aviation accident mainly limited to the methods of mathematical statistics, the analysis method means of a single, and in a passive state, so the accident prediction is poor. This paper, basis on the rough set theory in data mining and preferential information ,we improve the rough set attribute reduction algorithm, and applied to civil aviation accident analysis to indentify the potential law of accident.

Application of Rough Set Theory in Stochastic Fatigue Analysis of Vehicle Frame

2012 ◽  
Vol 430-432 ◽  
pp. 1814-1817
Author(s):  
Li Hui Zhao ◽  
Chang Hong Liu
Keyword(s):  
Set Theory ◽  
Rough Set ◽  
Rough Set Theory ◽  
Random Variable ◽  
Fatigue Analysis ◽  
Random Parameters ◽  
Lower Approximation ◽  
A Value ◽  
Interval Operation ◽  
Confidence Degree

Considering the up-down deflection of vehicle frame as a random variable when a car runs unsteadily, the alternating stress cased by deflection is random. The probability density function is determined by date of the alternating stress acting on the frame. Using the concepts of upper and lower approximation in the rough set theory and confidence degree, random parameters of vehicle frame can be transferred into certain interval values. When the confidence degree took a value from 0 to 1, a series of intervals between the upper and lower approximation are determined respectively. With the algorithm of the interval operation, a method of fatigue analysis is put forward.

An Algorithm of the Rough-ISM Analysis Method

2013 ◽  
Vol 779-780 ◽  
pp. 1693-1696
Author(s):  
Tian Wei Sheu ◽  
Tzu Liang Chen ◽  
Ching Pin Tsai ◽  
Jian Wei Tzeng ◽  
Masatake Nagai
Keyword(s):  
Set Theory ◽  
Rough Set ◽  
Research Method ◽  
Rough Set Theory ◽  
Structural Modeling ◽  
Analysis Method ◽  
Interpretive Structural Modeling ◽  
Important Thing ◽  
Remedial Teaching ◽  
Common Misconceptions

In this paper, an algorithm of the Rough-ISM analysis method is proposed. The Rough-ISM analysis method is the combination of the Rough set theory and Interpretive Structural Modeling (ISM). It is not only a simple research method, also a practical way to find the students misconceptions. In addition, the most important thing is that the analysis method can overcome fewer participates and problems through Rough set theory statistically. Through the analysis method, common misconceptions of whole class can be found and then and then supplying teaching path for teachers to conducting remedial teaching based on common misconceptions. Finally, a practical example is provided to make the calculate process more clearly.

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