Steerable filters are a valuable tool for various low-level vision tasks. In this paper we address steerable filters for rotations in three dimensions. For two dimensions the theory is well developed. It is common to compute higher order expansions of certain type of filters and steer them according to their maximal response. The simplicity in 2D is due to the Fourier theory: the irreducible su...

The open distribution system simulator (OpenDSS) is open-source software developed by the Electric Power Research Institute (EPRI) in United States for analyzing systems. OpenDSS primarily used systems fundamental power flow (FPF) and harmonic (HPF). Single-tune high-order filters are generally combined to achieve a better filtering performance practical analysis applications. However, requires...

In modern power systems, phasor measurements are expected to deal with challenging conditions, e.g. fast dynamics and high distortion levels. Taylor-Fourier Multifrequency models represent a promising solution, but their performance is strongly related the accurate extraction of signal spectral support. this context, paper proposes an enhanced method for support recovery that exploits inherent ...

High-order filters, such as inductor-capacitor-inductor ( LCL) filter, have been popular in grid-tied power converters. Although featuring small size, LCL filters are not grid friendly due to inherent resonance, especially when a large number of converters parallel operation todays electric attain modularity, reliability, and redundancy advantages. Thus, this article reconsiders the low-order L...

The separation of speech from two simultaneous talkers is a problem of some practical and theoretical importance. We describe a prototype separation system based on harmonic selection using comb filters. Hermes’ subharmonic spectrum method is used to produce a number of (weighted) pitch estimates, with pitch tracks for the two talkers then found by constrained dynamic programming. The system ha...

The harmonic mitigation using shunt active filters are most widely used in industrial and commercial applications. In this paper a Multi-Level Inverter is considered as DSTATCOM to compensate harmonics. The mathematical modeling of the system and design of the controller using synchronous reference frame theory is also presented. The nonlinear load generally known as diode rectifier load and an...