Results 21 to 30 of about 656,141 (223)

Source separation and localisation via tensor decomposition for distributed arrays

open access: yesThe Journal of Engineering, 2019
This study focuses on the problem of power spectra separation and localisation of multiple sources using distributed arrays. First, the array structure and signal model are discussed. By cross-correlating the multi-channel received signals in time-domain,
Yuanbing Cheng, Yapeng He
doaj   +1 more source

Spectrum analysis for the relativistic Boltzmann equation [PDF]

open access: yesarXiv, 2022
The spectrum structure of the linearized relativistic Boltzmann equation around a global Maxwellian is studied in this paper. Based on the spectrum analysis, we establish the optimal time-convergence rates of the global solution to the Cauchy problem for the relativistic Boltzmann equation.
arxiv  

On the spectrum of isomorphisms defined on the space of smooth functions which are flat at 0 [PDF]

open access: yesarXiv, 2023
In this note we study the spectrum and the Waelbroeck spectrum of the derivative operator composed with isomorphic multiplication ...
arxiv  

Finite element analysis of single pair gear tooth root crack

open access: yesThe Journal of Engineering, 2019
In the current research, the analysis about the stress and meshing stiffness for the single gear meshing process with two cases came out, which are case without tooth root cracking and with tooth root cracking. First, the solid assemble model for the two
Shaojun Dong, Zhongquan Luan, Chao Ma
doaj   +1 more source

Understanding Subsynchronous Oscillations in DFIG-Based Wind Farms Without Series Compensation

open access: yesIEEE Access, 2019
Subsynchronous oscillation (SSO) phenomena caused by interactions between controllers of Doubly-fed induction generators (DFIGs) and series capacitor compensators has been well recognized.
Yanhui Xu   +3 more
doaj   +1 more source

An Improved Location Method of 10 kV Cable Joints Based on Nuttall Self-Convolution Window

open access: yesZhongguo dianli, 2021
In order to solve the problem of spectrum leakage and fence effect when using discrete Fourier transform (DFT) to analyze the input impedance spectrum of header point of cable, this paper presents an improved method of the joints location for the 10kV ...
Xingquan XU   +6 more
doaj   +1 more source

Proposal of a Ball Burnishing Method with Forced Rotation

open access: yesTribology Online, 2011
In this report, a new ball burnishing process in which the ball is forced to be rotated is proposed. A ball rolling friction test apparatus in which the rotational speed of the ball can be controlled was developed. Controlling the rotational speed of the
Masaru Futamura   +3 more
doaj   +1 more source

Spectrum and Fine Spectrum of Band Matrices Generated by Oscillatory Sequences [PDF]

open access: yesarXiv, 2023
In this paper, a new class of band matrices is considered where the entries of each non-zero band form a sequence with two limit points. The compact perturbation technique is used to study the spectrum over the $\ell_{p}, (1
arxiv  

An Experimental Investigation of Moisture-Induced Softening Mechanism of Marble Based on Quantitative Analysis of Acoustic Emission Waveforms

open access: yesApplied Sciences, 2019
The decrease of strength after saturation of rocks is known as moisture-induced softening. To date, there are numerous studies on the mechanism of moisture-induced softening of different rocks.
Yiming Huang, Jianhui Deng, Jun Zhu
doaj   +1 more source

Spectrum Analysis of Contact Network for Public Policy in a Pandemic

open access: yesIEEE Access, 2022
In a pandemic, in order to slow down the spread of the virus, protect national health, and maintain the normal operation of economic activities, countries around the world will formulate public policies to limit the number of citizens that can gather ...
Qi Xu
doaj   +1 more source

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