Volume 4, Issue 3

The delamination growth may occur in piezoelectric laminated shell with delamination under a combined electro-thermo-mechanical loading. Based on the piezoelectric theory, the variational principle of moving boundary and considering the contact effect between delamination regions, the nonlinear governing equations for the piezoelectric laminated shell with delamination under hygrothermal condition are derived, and the corresponding boundary and matching conditions are given as well. At the same time, according to the Griffith criterion, the formula of energy release rate along the delamination front is obtained and the delamination growth is studied. In the numerical calculation, the energy release rate and delamination growth of axisymmetrical piezoelectric cylindrical shell are analyzed, and a parametric study is conducted, showing the effects of geometric nonlinear, voltage, temperature and humidity, mechanical load, delamination length and depth, geometrical parameter and material property on energy release rate.

In this paper, an adaptive critic-based neurofuzzy controller is presented for a 2 DOF active vehicle suspension system with a servo hydraulic actuator. Fuzzy critic-based learning is a reinforcement learning method based on dynamic programming. The only information available for the critic agent is the system feedback, which is interpreted as the last action performed by the controller in the previous state. The signal produced by the critic agent is used alongside the algorithm of error back propagation to tune online conclusion parts of the fuzzy inference rules of the adaptive controller. Simulation results demonstrate the superior performance of this control method in terms of well disturbance rejection, improved ride comfort, robustness to model uncertainty and lower controller cost.

This paper introduces a new sound steganographic algorithm based on Advanced Encryption Standard (AES). First of all sound is converted in the form of an image and then it is encrypted with the help of AES. Simulations and security analyses are provided to demonstrate an excellent performance of the proposed algorithm.

The recent paper by Bellfiore, Ghezzo, Tagliapietra and Umgiesser [1] gives us the opportunity to discuss the relative sea level rise in Venice (Venezia). They accept that the Venetian sea level rise will be part of a global rise caused by ocean thermal expansion and melting of icecaps caused in turn by global warming induced by anthropogenic carbon dioxide production. In reality the sea levels have been only oscillating during the last few decades. Theworldwide average sea level rise is free of any acceleration. This is also true for theVenice and Trieste tide gauges. The sea level records of Venice and Trieste are very different, and it is impossible for two places so close together to have such differences from a common rise in sea level. Venice is sinking relative to Trieste.

The specialty of data covering up has gotten much consideration in the late years as security of data has turn into a major concern in this web time. As sharing of delicate data by means of a typical correspondence station has get to be unavoidable, Steganography – the workmanship and art of concealing data has increased much consideration. We are likewise encompassed by a universe of mystery correspondence, where individuals of numerous types are transmitting data as guiltless as an encoded Visa number to an online store than and as deceptive as a terrorist plot to robbers. Steganography is derived from two Greek words, steganos, meaning covered or secret, and graphia, meaning writing. In simple terms, steganography is the art and science of hiding information in plain sight. Steganography is an innovation where advanced information pressure, data hypothesis, spread range, and cryptography innovations are united to fulfill the requirement for security on the Internet. This paper is an endeavor to examine the different methods utilized as a part of steganography and to recognize zones in which this method can be connected, so that humanity can be profited massively.

In this paper, we applied the functional variable method for four famous partial differential equations with power lawnonlinearity. These equations are included the Kadomtsev-Petviashvili, (3+1)-Zakharov-Kuznetsov, Benjamin-Bona-Mahony-Peregrine and Boussinesq equations. Various exact traveling wave solutions of these equations are obtained that include the hyperbolic function solutions and the trigonometric function solutions. The solutions shown that this method provides a very effective, simple and powerful mathematical tool for solving nonlinear equations in various fields of applied sciences.