Military Academy

About: Military Academy is a based out in . It is known for research contribution in the topics: Population & Fuzzy logic. The organization has 2478 authors who have published 3003 publications receiving 33188 citations.

Effect of Manganese Dioxide Dispersion on the Absorbing Properties of Manganese Dioxide (MnO2)-Epoxy Composites

Abstract: Manganese dioxide (MnO 2 ) particle was synthesized and introduced into epoxy resin to be microwave absorber. The spectroscopic characterization of the formation processes of MnO 2 was studied by using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Microwave absorbing properties with different volume fractions of Mn0 2 were investigated by measuring complex permittivity, complex permeability and reflection loss in the 2-18 and 18-40 GHz microwave frequency range using the free space method. The absorbing performance of MnO 2 -epoxy composites at same sample thickness and at various sample thickness were also studied. It was found that the best absorbing property and an absorption frequency range shifting could be obtained at the frequency range of 2-18 and 18-40 GHz.

Ohmic resistance of thin yttria stabilized zirconia film and electrode–electrolyte contact area

Abstract: This paper describes the factors influencing the measured value of ohmic resistance together with the structural and optical characterization of two thin yttria stabilized zirconia films. The investigated films were deposited on n-doped Si (1 1 1) substrates using e-beam evaporation of (YO1.5)0.18(ZrO2)0.82 pellets at 150°C. The crystallographic structures of both films were found as amorphous (thickness of 240 nm) and polycrystalline (thickness of 330 nm) with the grain size ∼36 nm. The imperfection of the electrical contact, in the case of thin films the thicknesses of which are ∼100 nm, can dramatically influence the magnitude of measured ohmic resistance. Moreover, the ratio of Reff/Rtrue cannot be determined from measurements of films with various thicknesses, but only estimated from micrographs or from measurements of films of the material with the known electrical conductivity. The different behaviour of the refractive index and the extinction coefficient of the two investigated films can be attributed to different crystallographic structures of the films.

Optimised active disturbance rejection motion control with resonant extended state observer

Abstract: Tracking sinusoidal references with high precision and rejection of sinusoidal disturbances is a challenging task in the motion control practice. In order to deal with this control problem, a new r...

Nonlinear dynamic response and vibration of imperfect eccentrically stiffened sandwich third-order shear deformable FGM cylindrical panels in thermal environments:

Abstract: This study follows an analytical approach to investigate the nonlinear dynamic response and vibration of eccentrically stiffened sandwich functionally graded material (FGM) cylindrical panels with ...