Results 71 to 80 of about 340,305 (333)

Application of Fast Fourier Transform to Ozone Data at Lagos, Nigeria [PDF]

, 2008
Fast Fourier Transform (FFT) is a mathematical too l often used to represent tim e-varying real data set function /(1). In this paper, the FFT was applied to the measured stratospheric ozone data at Lagos from 1997 to 2002.
Akinyemi, M. L.
core  

High performance Python for direct numerical simulations of turbulent flows

, 2016
Direct Numerical Simulations (DNS) of the Navier Stokes equations is an invaluable research tool in fluid dynamics. Still, there are few publicly available research codes and, due to the heavy number crunching implied, available codes are usually written
Langtangen, Hans Petter, Mortensen, Mikael   +1 more
core   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source

Alteration in EEG Delta and Beta Power During Working Memory Performance Differentiates Patients with Parkinson’s Disease with and without Dementia

Annals of Indian Academy of Neurology
Background and Objectives: Working memory (WM) impairment is a common and progressive abnormality in Parkinson’s disease (PD), which ultimately leads to dementia.
Anita Pal, Madhuri Behari, Ratna Sharma
doaj   +1 more source

Identification Of Ball Bearing Damage On Induction Motors Through Sound Signal Analysis [PDF]

Journal of Electrical and Electronics Engineering, 2022
Induction motors are generally used in industry as a drive. Bearing is one part of the motor element that plays an important role because it has the function to support a shaft so that it can rotate without experiencing excessive friction. Bearing damage
Iradiratu Diah Prahmana Karyatanti, Rafli Setiawan Zulkifli, Ananda Noersena, Firsyaldo Rizky Purnomo, Belly Yan Dewantara, Ardik Wijayanto   +5 more
doaj  

Understanding and Tuning Mobile Interfaces in Ferroelectric Hf0.5Zr0.5O2 Thin Films in Relation to Microstructure

Advanced Functional Materials, EarlyView.
Ferroelectricity in thin HfO2‐based films offers great possibilities for next‐generation neuromorphic memory devices. There, the response to subcoercive voltage signals is driven by the movement of mobile interfaces and their interaction with crystal defects – a yet rather unexplored aspect, which we shed light on and gain new insights into the complex
Maximilian T. Becker, Yoonsang Park, Kihong Kim, Ji Soo Kim, Nives Strkalj, Atif Jan, Giuliana Di Martino, Benson K. Tsai, Haiyan Wang, Ping Lu, Duk‐Hyun Choe, Judith L. MacManus‐Driscoll   +11 more
wiley   +1 more source

Enhancement of Fingerprint Using FFT×|FFT|n Filter

Procedia Computer Science, 2015
AbstractFingerprint enhancement is an indispensable task in the Automatic Fingerprint Identification System. In this paper, a simple method for the enhancement of fingerprint images is presented, which is based on FFT. The FFT is found out after the fingerprint image is partitioned into blocks.
Neethu, S., Sreelakshmi, S., Sankar, Deepa   +2 more
openaire   +1 more source

Design and Implementation of an Ultralow-Energy FFT ASIC for Processing ECG in Cardiac Pacemakers

IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2019
In embedded biomedical applications, spectrum analysis algorithms such as fast Fourier transform (FFT) are crucial for pattern detection and have been the focus of continued research.
Safwat Mostafa Noor, E. John, Manoj Panday   +2 more
semanticscholar   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

Simulation of interaction of antennas in the near zone

Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка
Relevance. Obtaining the minimization or maximization of the interaction between the radiating and receiving antennas (or the receiving antenna with fields reflected from some obstacle) due to the orientation and location of the antennas at a certain ...
М. Legenkiy, V. Khrychov
doaj   +1 more source