The article discusses the feasibility of applying protrusions for round suns-skin, used to capture pollutants. boundaries vortex zones at entrance suction-squabbles with are found. dependences axial velocity suction air flow different lengths and angles inclination skin determined. Ill. 6. Ref. 23.

Let g be a continuous, compactly supported function on R such that the integer translates of g constitute a partition of unity. We show that the Gabor system (g, a, b), with window g and time-shift and frequency-shift parameters a, b > 0 has no lower frame bound larger than 0 if b = 2, 3, . . . and a > 0. In particular, (g, a, b) is not a Gabor frame if g is a continuous, compactly supported wa...

In this work we study families of pairs of window functions and lattices which lead to Gabor frames which all possess the same frame bounds. To be more precise, for every generalized Gaussian g, we will construct an uncountable family of lattices [Formula: see text] such that each pairing of g with some [Formula: see text] yields a Gabor frame, and all pairings yield the same frame bounds. On t...

We consider the frame property of the Gabor system G(g, α, β) = {eg(t − αm) : m,n ∈ Z} for the case of rational oversampling, i.e. α, β ∈ Q. A ’rational’ analogue of the Ron-Shen Gramian is constructed, and prove that for any odd window function g the system G(g, α, β) does not generate a frame if αβ = n−1 n . Special attention is paid to the first Hermite function h1(t) = te −πt .

Micro-concentrator photovoltaic (CPV), incorporating micro-scale solar cells within concentrator modules, promises an inexpensive and highly efficient technology that can mitigate the drawbacks impede standard CPV, such as resistive power losses. In this paper, we fabricate multijunction designed for micro-CPV applications. A generic process flow, including plasma etching steps, was developed f...

The Centre for Sustainable Energy Systems (CSES) at The Australian National University, with Origin Energy, has developed a novel cell fabrication process for single crystal silicon PV. The Sliver® cell fabrication process produces narrow and long cells. With some modifications to the current fabrication process it is possible to produce Sliver® cells suitable for concentrator systems with low ...

A (K1,3, λ)-frame of type g u is a K1,3-decomposition of a complete upartite graph with u parts of size g into partial parallel classes each of which is a partition of the vertex set except for those vertices in one of the u parts. In this paper, we completely solve the existence of a (K1,3, λ)-frame of type g .

The purpose of the paper is to analyze g-frames form \(\{\varphi T^{i} \in B(\mathcal {H},\mathcal {K})\}_{i=0}^\infty \), where \(T\in {H})\) and \(\varphi {K})\), discuss properties operator T. We consider stability g-Riesz sequences \). Finally, a weighted representation g frame introduced some its are presented. provide sufficient condition for given g-frame \(\Lambda =\{\Lambda _{i}\in {B(...

for all f ∈ H . The constant A (respectively, B) is a lower (resp. upper) frame bound for the frame. One of the most important frames for applications, especially signal processing, are the Weyl-Heisenberg frames. For g ∈ L(R) we define the translation parameter a > 0 and the modulation parameter b > 0 by: Embg(t) = e , Tnag(t) = g(t− na). For g ∈ L(R) and a, b > 0, we say for short that (g, a,...