Under a contamination of background sound noises, it seems difficult especially in a real working situation to evaluate various type statistics of only an objective sound signal fluctuation. In many cases of the noise evaluation, some signal processing method have been employed to eliminate the effect of background sound noises by first measuring emitted sound levels. In this study, a new evalu...

In this paper, an efficient chaos-based image encryption scheme is proposed, which uses the imitating jigsaw method containing revolving and shifting operations. scheme, there are three processes in encryption: preprocessing, process, postprocessing. original partitioned into 64 × pixel blocks then randomly revolved shifted under control sequences generated by hyperchaotic Lorenz system whose i...

The issue raised in this study is about learning qiro'ah using the jigsaw method as an innovative teaching method. Jigsaw a collaborative method, which forms students to small groups consisting of 4 people by paying attention heterogeneity students' ability levels, teacher gives card containing material topics be discussed expert who will then tasked with explaining group members origin and eac...

Water-fat separation in magnetic resonance imaging (MRI) is of great clinical importance, and the key to uniform water-fat separation lies in field map estimation. This work deals with three-point field map estimation, in which water and fat are modelled as two single-peak spectral lines, and field inhomogeneities shift the spectrum by an unknown amount. Due to the simplified spectrum modelling...

Word segmentation is a key problem for Chinese text analysis. In this paper, with the consideration of both word-coverage rate and sentencecoverage rate, based on the classic Bi-Directed Maximum Match (BDMM) segmentation method, a character Directed Graph with ambiguity mark is designed for searching multiple possible segmentation sequences. This method is compared with the classic Maximum Matc...

We propose two methods for avoiding the checkerboard distortion which is caused by finite word length error. The first method is deriving a bit length of filter taps required for avoiding the checkerboard distortion under a certain word length. In the second method, the checkerboard distortion can be avoided by using the cascade structure which consist of zero-hold kernel and a time-invariant f...