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Cracks in welds are commonly viewed as fatal defects, which possibly cause incredible losses in industries. In this paper, a segmentation method is proposed base on double-thresholding and fuzzy sets theory. Results show that it can also be used in detection of other kinds of defects, and has advantages of simplicity and high efficiency, which are important(More)
We also gratefully acknowledge the contribution of I/B/E/S International Inc. for providing earnings per share forecast data, available through the Institutional Brokers' Estimate System. These data have been provided as part of a broad academic program to encourage earnings expectation research. Abstract In this study we examine changes in the information(More)
Many of visitors would be left stranded in the exhibition or traveling area, which might cause traffic jam and bring big pressure to organizer or operator. If the organizer can realize the number of visitor in every venues on time, then the visitors may be guided, and moreover should be provided with 'Personalized Tour Guide' according to their preferences.(More)
It has become an inevitable development that X-ray digital imaging detectors replace film-screen. The imaging quality of X-ray digital detector could not reach the level of film-screen due to its unique characteristics. It is the key that to research the method of improving and optimizing the digital imaging quality. The main factors to impact X-ray digital(More)
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