In this paper, a hybrid, frequency division duplex (FDD), time division–code division multiple access (TD-CDMA), medium access control (MAC) protocol is proposed. Both multicode (MC) and orthogonal variable spreading factor (OVSF) transmission modes are used in order to utilise the system resources more efficiently. Moreover, a new rate-scheduling algorithm is developed, aimed at providing a tr...

In order to better preserve the edge features and also refrain them from the staircasing effect in smooth regions, this paper investigates a hybrid model for restoring the blurred images with additive Gaussian noise and an effective iterative scheme based on alternating direction method is employed to solve the minimization problem suggested by us with two regularization terms. Numerical experi...

In this paper we shall propose a novel hybrid IP traceback scheme with packet counters. In our scheme, a (packet) counter is used to improve correlation of packet sampling in order to reconstruct the attack tree efficiently. Our scheme has the remarkable advantages: (1) it is simple and efficient, (2) it is significantly resistant to attacks, (3) it requires a lower sampling rate compared with ...

In this paper, a supervisory controller is proposed to manage the power flow in a hybrid AC/DC micro-grid for both grid-connected and disconnected modes. When the hybrid AC/DC micro-grid is connected to the utility grid, power surplus or shortage leads to power trade between the micro-grid and the utility grid. In the grid-disconnected mode, the renewable power sources (wind and solar generatio...

For discontinuous solutions of hyperbolic conservation laws, a Hybrid scheme, based on the high order nonlinear characteristic-wise weighted essentially non-oscillatory conservative finite difference (WENO) scheme and the high resolution spectral-like linear compact finite difference (Compact) scheme, is developed for capturing shock and strong gradients accurately and resolving smooth scale st...

We present BFL, a hybrid logic for representing uncertain knowledge. BFL attaches a quantified notion of belief based on Dempster-Shafer’s theory of belief functions to classical first-order logic. The language of BFL is composed of objects of the form F:[a,b], where F is a first-order sentence, and Q and b are numbers in the [O,l] interval (with c&b). Intuitively, a measures the strength of ou...

A hybrid weighted essentially non-oscillatory (WENO)/centered-difference numerical method, with low numerical dissipation, high-order shock-capturing, and structured adaptive mesh refinement (SAMR), has been developed for the direct numerical simulation of the multicomponent, compressive, reactive Navier-Stokes equations. The method enables accurate resolution of diffusive processes within reac...

in this paper, we introduce the new class of implicit l-stable generalized hybrid methods forthe numerical solution of first order initial value problems. we generalize the hybrid methodswith utilize ynv directly in the right hand side of classical hybrid methods. the numericalexperimentation showed that our method is considerably more efficient compared to wellknown methods used for the numer...

in this article, we prove the existence of extremal positive solution for the distributed order fractional hybrid differential equation$$int_{0}^{1}b(q)d^{q}[frac{x(t)}{f(t,x(t))}]dq=g(t,x(t)),$$using a fixed point theorem in the banach algebras. this proof is given in two cases of the continuous and discontinuous function $g$, under the generalized lipschitz and caratheodory conditions.