For a class of discrete-time bidirectional associative memory neural networks (DTBAMNNs) with multiple time-varying delays, the issue state estimation is studied. By propose mathematical induction method, we first investigate novel delay-dependent and -independent global exponential stability (GES) criteria error system. The obtained GES are described by linear scalar inequalities. Then, observ...

background: this study was aimed to compare the diagnostic accuracy and feasibility of cone beam computed tomography (cbct) with phosphor storage plate (psp) in detection of simulated occlusal secondary caries. materials and methods: in this in vitro descriptive-comparative study, a total of 80 slots of class i cavities were prepared on 80 extracted human premolars. then, 40 teeth were randomly...

Abstract From any location outside the event horizon of a black hole there are an infinite number trajectories for light to observer. Each these paths differ in orbits revolved around and their proximity last photon orbit. With simple numerical perturbed analytical solution null-geodesic equation Schwarzschild we will reaffirm how each additional orbit is factor $$e^{2 \pi }$$ <mml:math xmlns:m...

This paper presents a nonsingular terminal sliding mode and active disturbance rejection decoupling control (NTSM-ADRDC) scheme for the three-dimensional (3D) trajectory tracking of autonomous underwater vehicles (AUV). Firstly, AUV model is decoupled into five independent single input–single output (SISO) channels using ADRDC technology. Secondly, NTSM-ADRDC controller designed. The linear ext...

A bstract We consider the issue of information recovery for an object carrying energy and entropy into a black hole using generalized formalism, in context JT gravity where backreaction problem can be solved exactly. verify main aspects Hayden-Preskill scenario but with some refinements. show that is encoded Hawking radiation redundant way, as expected quantum error correcting code. how extrema...

In this paper, the design problem of simultaneous estimation unmeasurable states and unknown inputs (UIs) is investigated for a class discrete-time linear implicit models (DLIMs). The UIs affect both state output system. approach based on separation between dynamic static relations in considered DLDM. First, method permitting to separate equations from exposed. Next, an augmented explicit model...

this paper addresses the design of an observer-based fault diagnosis scheme, which is applied to some of the sensors and actuators of a wind turbine benchmark model. the methodology is based on a modified sliding mode observer (smo) that allows accurate reconstruction of multiple sensor or actuator faults occurring simultaneously. the faults are reconstructed using the equivalent output error i...

In a practical alternating current (ac) machine drive system, zero-order hold equivalent discrete-time model motivates the development of direct regulator structure. However, it is complicated to establish for asymmetric 1 <fn id="fn1" xmlns:xlink="http://www...

this paper addresses a nonlinear observer based control scheme to synchronize chaotic systems subject to uncertainties and external disturbances. it is assumed that the dynamic of slave system is not completely known. in order to compensate for the system perturbation resulting from parameter variations and mismodeling phenomena, an adaptive neural network observer is employed to handle this pr...