Results 61 to 70 of about 854,084 (200)

Weak Gravitational Lensing by Voids [PDF]

, 1998
We consider the prospects for detecting weak gravitational lensing by underdensities (voids) in the large-scale matter distribution. We derive the basic expressions for magnification and distortion by spherical voids. Clustering of the background sources
Amendola, Luca, Frieman, Joshua A., Waga, Ioav   +2 more
core   +2 more sources

PENYELESAIAN PERSAMAAN DUFFING OSILATOR PADA APLIKASI WEAK SIGNAL DETECTION MENGGUNAKAN METODE AVERAGING

Jurnal MIPA, 2015
Pada persamaan diferensial terdapat klasifikasi yaitu persamaan diferensial linear dan persamaan diferensial tak linear. Salah satu contoh dari persamaan diferensial tak linear yaitu persamaan Duffing.
Z A Tamimi, S B Waluya
doaj  

Weak GPS Signal Acquisition Algorithm Based on Chaotic Oscillator

EURASIP Journal on Advances in Signal Processing, 2009
To detect weak Global Position System (GPS) signal indoors, various high-sensitivity detection algorithms have been proposed. However, a common tradeoff between high-sensitivity and computation burden impedes development of high sensitivity GPS receiver.
Zhiqin Zhao, Yiming Pi, Pengda Huang
doaj   +1 more source

Effects of Second-Order Matched Stochastic Resonance for Weak Signal Detection

IEEE Access, 2018
Weak signal detection via stochastic resonance (SR) has attracted considerable attention in a wide range of research fields, especially under heavy background noise circumstances.
Haitao Dong, Haiyan Wang, Xiaohong Shen, Zhe Jiang   +3 more
doaj   +1 more source

Weak Coherent Light Interference Heterodyne Detection Based on Time-Domain Signal Analysis

IET Signal Processing
Weak coherent light interference heterodyne detection is the theoretical basis for fiber optic gyroscopes, optical coherence tomography, and optical time-domain reflectometers.
Hui Shen, Yousen Li
doaj   +1 more source

Algorithm Used to Detect Weak Signals Covered by Noise in PIND

International Journal of Aerospace Engineering, 2019
Detection of the loose particles is urgently required in the spacecraft production processes. PIND (particle impact noise detection) is the most commonly used method for the detection of loose particles in the aerospace electronic components.
G. T. Wang, X. W. Liang, Y. Y. Xue, C. Li, Q. Ding   +4 more
doaj   +1 more source

Elastic scattering of electron vortex beams in magnetic matter

, 2016
Elastic scattering of electron vortex beams on magnetic materials leads to a weak magnetic contrast due to Zeeman interaction of orbital angular momentum of the beam with magnetic fields in the sample.
Edström, Alexander, Lubk, Axel, Rusz, Ján   +2 more
core   +1 more source

Study on a New Electromagnetic Flow Measurement Technology Based on Differential Correlation Detection

Sensors, 2020
Under the conditions of low flow rate and strong noise, the current electromagnetic flowmeter (EMF) cannot satisfy the requirement for measurement or separate the actual flow signal and interference signal accurately. Correlation detection technology can
Liang Ge, Junxian Chen, Guiyun Tian, Wen Zeng, Qi Huang, Ze Hu   +5 more
doaj   +1 more source

Chaotic Effect-Based Array Duffing Systems with Improved Nonlinear Restoring Force for Weak Signal Detection in Dynamic MWD. [PDF]

Sensors (Basel), 2023
Yang Y, Ding Q, Gao Y, Chen J.
europepmc   +1 more source

Weak ultrasonic signal detection in strong noise

Acta Physica Sinica, 2018
In order to solve the problem of extracting ultrasonic signals from strong background noise, a novel method, which is termed APSO-SD algorithm and based on improved adaptive particle swarm optimization (APSO) and sparse decomposition (SD) theory, is proposed in this paper.
null Wang Da-Wei^1\2, null Wang Zhao-Ba   +1 more
openaire   +1 more source