Amethod is presented for the improvement of the resolution and clarity of bilinear time frequency distributions generated from signals consisting of a number of approximately time-frequency disjoint components. The method involves the determination of the parameters of a finite mixture of Gaussians, which is used to model an initial time-frequency distribution. The expectation-maximisation algo...

Using a simple pattern finding approach, we investigate to what degree patterns found in the tempo and loudness curves measured from piano performances of a classical piece coincide with repeated musical structures in the score that was performed. We show that high frequency content in such curves is more useful for finding repetitions of musical structures than low frequency content. In some c...

Now adays, content-based image retrieval (CBIR) is the mainstay of image retrieval systems. To be more profitable, Relevance Feedback (RF) techniques were incorporated into CBIR such that more precise results can be obtained by taking user's feedbacks into account. In this paper Content Based Image Retrieval algorithms using Relevance Feedback technique are discussed. The comparative study...

imperialist competitive algorithm (ica) is a new socio-politically motivated global search strategy. the ica is applied to hybrid composite laminates to obtain minimum weight and cost. the approach which is chosen for conducting the multi-objective optimization was the weighted sum method (wsm). the hybrid composite laminates are made of glass/epoxy and carbon/epoxy to combine the lightness and...

this paper presents a new modified shuffled frog leaping algorithm (msfla) applied to design simultaneous coordinated tuning of damping controllers to damp the power system low frequency oscillations. for this, a new frog leaping rule is proposed to improve the local exploration and performance of the original sfla and the genetic mutation operator is employed for new frog generation instead of...