This paper deals with an indirect current controlled shunt active power filter (SAPF) for improving power quality by reactive power compensation and harmonic filtering. The presence of harmonics and reactive power in the power source because it will cause additional power losses and malfunctions. The proposed APF is based on a voltage source inverter (VSI). The VSI is controlled by two loops, t...

Harmonic complex tones produce pitch-height perception corresponding to the fundamental frequency (F0). This study investigates how the spectral cue of F0 is processed in neurons of the primary auditory cortex (A1) with sustained-response properties. We found F0-sensitive and -insensitive cells: the former discriminated between harmonics and noise, while the latter did not. F0-sensitive cells p...

A novel spherical convolution is defined through the sifting property of Dirac delta on sphere. The so-called by inner product one function with a translated version another, but adoption an alternative translation operator This follows analogy Euclidean when viewed in harmonic space. satisfies variety desirable properties that are lacking alternate definitions, namely: it supports directional ...

‎In this paper‎, ‎we study the convex combinations of harmonic mappings obtained by shearing a class of slit conformal mappings‎. ‎Sufficient conditions for the convex combinations of harmonic mappings of this family to be univalent and convex in the horizontal direction are derived‎. ‎Several examples of univalent harmonic mappings constructed by using these methods are presented to illustrate...

we study the notion of harmonicity in the sense of symplectic geometry, and investigate the geometric properties of harmonic thom forms and distributional thom currents, dual to different types of submanifolds. we show that the harmonic thom form associated to a symplectic submanifold is nowhere vanishing. we also construct symplectic smoothing operators which preserve the harmonicity of distri...

We extend the notion of trend filtering to tensors by considering $k\mathrm{th}$-order Vitali variation – a discretized version integral absolute value total derivative. prove adaptive $\ell^0$-rates and not-so-slow $\ell^1$-rates for tensor denoising with filtering. For $k={1,2,3,4}$ we that $d$-dimensional margin can be estimated at $\ell^0$-rate $n^{-1}$, up logarithmic terms, if underlying ...

the superiority of the quadratic images to second harmonic (SH) images in phantoms, both in terms of spatial and contrast resolutions. Furthermore, we have shown that the quadratic images produce contrast-to-tissue ratios (CTRs) at the same level of those produced by pulse inversion (PI) without the need for multiple transmission. The imaging results have also shown that quadratic imaging also ...

This paper presents a four-core LC-VCO array in 55 nm CMOS technology. Based on the multi-core VCO technology and switched capacitor technology, tuning range is expanded, phase noise optimization wide achieved based second harmonic filtering Q value degeneration as well of switching transistors. The proposed array, occupying chip area 1.65 × 1.44 mm2, realizes measured oscillation frequency abo...