This paper looks at an approach that uses symmetric properties of the basis function to remove redundancies in the calculation of the discrete Fourier transform (DFT). We develop an algorithm, called the quick Fourier transform (QFT), that reduces the number of oating point operations necessary to compute the DFT by a factor of two or four over direct methods or Goertzel's method for prime leng...

Induction machines are essential components of many industrial installations and, therefore, their faults must be detected early. Fault detection using current spectrum analysis is attracting an increasing interest as a condition-based monitoring technique. However, its use to detect rotor asymmetries in high-power induction machines, which operate at very low slip, particularly challenging, du...

A non-invasive technique for condition monitoring of brushless DC motor drives is proposed in this study Hall-effect position sensor fault diagnosis. Position faults affect rotor feedback, resulting faulty transitions, which turn cause current fluctuations and mechanical oscillations, derating system performance threatening life expectancy. The main concept the to detect using vibration signals...

In this paper, we focus on CMF signal processing and aim to resolve the problems of precision sharp-decline occurrence when using adaptive notch filters (ANFs) for tracking the signal frequency for a long time and phase difference calculation depending on frequency by the sliding Goertzel algorithm (SGA) or the recursive DTFT algorithm with negative frequency contribution. A novel method is pro...

Respiration rate monitoring using ultra-wideband (UWB) radar is preferred because it provides contactless measurement without restricting the person’s privacy. This study considers a novel non-contact-based solution single-input multiple-output (SIMO) UWB impulse radar. In proposed system, collected data are converted to several narrow-band signals generalized Goertzel algorithm (GGA), which us...

Bioimpedance measurement is a non-invasive, radiation-free, and inexpensive method for measuring the electrical properties of biological tissues. In applications where transients occur, commonly used swept sinewave replaced with broadband signals such as multisine. This makes signal generation extraction real imaginary parts impedance challenging. this brief, an alternative to traditional fast ...

This chapter sketches a strategic map of a selection of the relevant issues at the intersection of economics, psychology, sociology, and evolutionary theories applied to strategic management. It takes an evolutionary complexity perspective, based on a (manageable) selection of the relevant literature. The discussion focuses on evolutionary processes of change and their implications for strategi...

Horner’s method is a standard minimum arithmetic method for evaluating and deflating polynomials. It can also efficiently evaluate various order derivatives of a polynomial, therefore is often used as part of Newton’s method. This note tries to develop the various techniques called Horner’s method, nested evaluation, and synthetic division in a common framework using a recursive structure and d...

Article history: Received 3 November 2015 Accepted 3 February 2016 Available online xxxx We analyze the role of the Global Brain in the sharing economy, by synthesizing the notion of distributed intelligencewith Goertzel's concept of an offer network. An offer network is an architecture for a future economic system based on thematching of offers and demands without the intermediate of money. In...