Training of autoencoders using the back-propagation algorithm is challenging for non-differential channel models or in an experimental environment where gradients cannot be computed. In this paper, we study a gradient–free training method based on cubature Kalman filter. To numerically validate method, autoencoder employed to perform geometric constellation shaping differentiable communication ...

Wireless sensors are everywhere. To address their energy supply, we proposed an end-to-end design for polar-coded integrated data and networking (IDEN), where the conventional signal processing modules, such as modulation/demodulation channel decoding, replaced by deep neural networks (DNNs). Moreover, input-output relationship of harvester (EH) is also modelled a DNN. By jointly optimizing bot...

Energetic electron precipitation (EEP) forms ozone-depleting nitrogen and hydrogen oxides in the high-latitude middle upper atmosphere, leading to ozone destruction temperature enhancement that can enhance winter polar vortex. This EEP effect on vortex depends quasi-biennial oscillation sudden stratospheric warmings, which earlier studies relate planetary waves. We study here possible modulatio...

Introduction: In this study, Antibacterial and antioxidant activities of the essential oil and methanolic extract of the endemic plant, Zataria multiflora Boiss. have been studied. Method: The antioxidant potential of the samples was evaluated using two separate methods of inhibition of free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ammonium thiocyanate systems. Antibacterial activity wa...

for a polynomial p(z) of degree n, having all zeros in |z|< k, k< 1, dewan et al [k. k. dewan, n. singh and a. mir, extension of some polynomial inequalities to the polar derivative, j. math. anal. appl. 352 (2009) 807-815] obtained inequality between the polar derivative of p(z) and maximum modulus of p(z). in this paper we improve and extend the above inequality. our result generalizes certai...

visual servoing is generally contained of control and feature tracking. study of previous methods shows that no attempt has been made to optimize these two parts together. in kernel based visual servoing method, the main objective is to combine and optimize these two parts together and to make an entire control loop. this main target is accomplished by using lyapanov theory. a lyapanov candidat...

different software tools for quantification of myocardial perfusion spect (mps) studies are routinely used. several perfusion parameters can be computed automatically.  interpretation of the mps should start with visual inspection of the rotating planar images, visual analysis of reconstructed spect slices and then quantitative analysis to confirm the visual impression. quantification should be...

Let K be a convex body and K◦ its polar body. Call φ(K) = 1 |K||K◦| R