In this paper, for topology optimization of double layer grids, an efficient optimization method is presented by combination of Imperialist Competitive Algorithm (ICA) and Gravitational Search Algorithm (GSA) which is called ICA-GSA method. The present hybrid method is based on ICA but the moving of countries toward their relevant imperialist is done using the la...

Dynamic contrast-enhanced (DCE) imaging is widely used for in vivo assessment of the cerebral blood perfusion. In this work, we investigate the use of independent component analysis (ICA) on DCE imaging data for assessment of cerebral blood perfusion, without any prior knowledge of the underlying tissue vasculature and arterial input function. The minimum description length (MDL) criterion and ...

To cite: Bhandarkar AM, Nayak R, Chidambaranathan N, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2014-208184 DESCRIPTION A 45-year-old non-hypertensive woman presented with a foreign body sensation in the throat of 3 months duration. Endoscopic examination showed a pulsating swelling in the right oropharynx with intact oropharyngeal mucosa (video 1). C...

The purpose of this study was to assess blood flow responses to changes in carbon dioxide (CO2) in the internal carotid artery (ICA), external carotid artery (ECA), and vertebral artery (VA) during normothermic and hyperthermic conditions. Eleven healthy subjects aged 22 ± 2 (SD) yr were exposed to passive whole body heating followed by spontaneous hypocapnic and hypercapnic challenges in normo...

In the first part of this work, we define several compression schemes based on JPEG2000 using two different transforms to reduce the spatial and spectral redundancies. The first one is the DWT (Discrete Wavelet Transform) that is well known with his properties to reduce in a good way the spatial redundancy between the wavelet coefficients. We develop the criterion to be minimized in order to ob...

Today, machining processes are among the most common and important industrial operations. Considering the wide applications of the machining processes, the importance of having an accurate and reliable monitoring system is clear. Therefore, several researches and studies have been performed to respond to this demand. Despite considerable efforts in this field, the achievement is not satisfactor...

this paper presents an accurate differential global positioning system (dgps) using multi-layered neural networks (nns) based on the back propagation (bp) and imperialistic competition algorithm (ica) in order to predict the dgps corrections for accurate positioning. simulation results allowed us to optimize the nn performance in term of residual mean square error. we compare results obtained b...

Previous work has shown that various flavours of Independent Component Analysis, when applied to natural images, all result in broadly similar localised, oriented band-pass feature detectors, which have been likened to wavelets or edge detectors. In this paper, we present a similar analysis of ‘natural’ sounds drawn from two radio stations: one broadcasting mainly speech; the other mainly class...

A number of recent studies have suggested that icariin (ICA), a class of phytochemical with numerous biological activities, may exert protective effects against postmenopausal bone loss. However, it remains unclear whether ICA regulates or improves the osteoblastic function of bone marrow stromal cells (BMSCs) in the treatment and prevention of osteoporosis. In the present study, the osteogenic...

The Discrete Wavelet Transform (DWT) has two parameters: the mother of wavelets and the number of iterations. Selecting different parameters for different DWT of the same signal, different energy concentrations in the wavelet domain are obtained. So, for a particular signal there is a better pair of parameters that realizes the best energy concentration in the wavelet transform domain. In appli...