The current emphasis on increasing aeronautical efficiency is leading the way to a new class of lighter more flexible airplane materials and structures, which unfortunately can result in aeroelastic instabilities. To effectively control the wings deformation and shape, appropriate modeling is necessary. Wings are often modeled as cantilever beams using finite element analysis. The drawback of t...

In this paper, an innovative algorithm of identification of control system, described by irrational transfer function with distributed parameter characteristics with irrational components, is proposed. Algorithm is based on real interpolation method (RIM). Parameters of irrational transfer function can be identified by its experimental transient responses. Each of them can be represented by an ...

AbstructA new method is proposed for dominant polezero (or pole-residue) analysis of large linear microwave circuits containing both lumped and distributed elements. The method is based on a multipoint Pad6 approximation. It finds a reducedorder rational s-domain transfer function using a data set obtained by solving the circuit at only a few frequency points. We propose two techniques in order...

The aim of this study was to assess the effects of strip cropping and different weed control methods on the yield and yield structure of dent maize, narrow-leafed lupin and spring oat. A split-plot design with four replications was conducted in 2008-2010. The following factors were analysed in the experiment: I. Cultivation method – sole cropping and strip cropping; II. Weed control method ...

In this paper, we apply our recently developed energy-conserving discontinuous Galerkin (DG) methods [1] for the two-species Vlasov-Ampère system to simulate the evolution of electron holes (EHs). The EH is an important Bernstein-Greene-Kurskal (BGK) state and is constructed based on the Schamel distribution in our simulation. By varying the mass and temperature ratios, we observe the stationar...

The right hand side Q ~,FP (w) models the averaged environmental intera tions with the system and is referred to as the Quantum Fokker-Plan k operator. The operator Θ[V ] is a pseudo-di erential operator and takes into a ount the nonlo al a tion of the potential V . In this paper we propose a Dis ontinuous Galerkin approximation for the above problem. The omputation applies to a wide range of a...

A truly Meshless Local Petrov-Galerkin (MLPG) method is developed for solving 3D elasto-static problems. Using the general MLPG concept, this method is derived through the local weak forms of the equilibrium equations, by using a test function, namely, the Heaviside step function. The Moving Least Squares (MLS) are chosen to construct the shape functions. The penalty approach is used to impose ...