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...

Mass Spectrometry (MS) is a widely used technique in molecular biology for high throughput identification and sequencing of peptides (and proteins). Tandem mass spectrometry (MS/MS) is a specialised mass spectrometry technique whereby the sequence of peptides can be determined. Preprocessing of the MS/MS data is indispensable before performing any statistical analysis on the data. In this work,...

hyperspectral data potentially contain more information than multispectral data because of their higher spectral resolution. however, the stochastic data analysis approaches that have been successfully applied to multispectral data are not as effective for hyperspectral data as well. various investigations indicate that the key problem that causes poor performance in the stochastic approaches t...

This paper presents constant propagation and common factors rewriting methods for boolean formula preprocessing. Formula rewriting performs symbolic simplification, and attempts to reconstitute hidden structure in the model that was lost by the conversion to a boolean formula. We show examples of fault trees whose assessment becomes feasible only after this kind of preprocessing.