Results 21 to 30 of about 309,183 (313)

A practical technique for the generation of highly uniform LIPSS [PDF]

open access: yes, 2014
Laser-induced periodic surface structures (LIPSS) can be reliably produced with ultrashort (<10 ps) laser pulses given fluence near the ablation threshold. Neat, parallel, uniform structures are harder to reproduce.
Weston, Nick   +3 more
core   +1 more source

Study on “Metamaterial” Structural Absorbing Composite Technology

open access: yesCailiao gongcheng, 2017
The process technology and the mechanical and electrical properties of the "metamaterial"structural absorbing composites were studied, in which metal periodic structure units were produced on the organic carrier film and then combined with medium ...
LI Song-ming   +4 more
doaj   +1 more source

Kekonvergenan MSE Penduga Kernel Seragam Fungsi Intensitas Proses Poisson Periodik dengan Tren Fungsi Pangkat

open access: yesComTech, 2012
The number of customers who come to a service center will be different for each particular time. However, it can be modeled by a stochastic process. One particular form of stochastic process with continuous time and discrete state space is a periodic ...
Ro’fah Nur Rachmawati
doaj   +1 more source

Vortex evolution near the Coanda surface of a circulation control airfoil with pulsed actuation

open access: yesAIP Advances, 2022
A special vortex evolution process was found near the Coanda surface for circulation control airfoil with pulsed actuation. For the jet-on process, two successive shedding vortices from the lower lip edge and the separation vortex on the Coanda surface ...
Quanbing Sun   +4 more
doaj   +1 more source

Periodic systems largely system equivalent to periodic discrete-time processes [PDF]

open access: yes, 2001
summary:In this paper, the problem of obtaining a periodic model in state-space form of a linear process that can be modeled by linear difference equations with periodic coefficients is considered.
Longhi, Sauro   +7 more
core   +1 more source

Periodicity in distribution. I. Discrete systems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
We consider the existence of periodic in distribution solutions to the difference equations in a Banach space. A random process is called periodic in distribution if all its finite-dimensional distributions are periodic with respect to shift of time with
A. Ya. Dorogovtsev
doaj   +1 more source

Development of TAPUBA Puzzle as an Independent Learning Medium for the Periodic System of Elements

open access: yesJurnal Inovasi Pendidikan Kimia, 2023
The material for the periodic system of elements is a chemical material that should be studied independently. However, the lack of media that supports this is a problem.
Muhammad Zamhari   +2 more
doaj   +1 more source

On multiple periodic autoregression [PDF]

open access: yes, 1987
summary:The model of periodic autoregression is generalized to the multivariate case. The autoregressive matrices are periodic functions of time. The mean value of the process can be a non-vanishing periodic sequence of vectors.
Anděl, Jiří
core   +1 more source

Fabrication of periodic microstructures for improving light-extraction efficiencies of light-emitting ZnO/Si devices

open access: yesResults in Physics, 2017
This article presents the first demonstration of integrating a simple one-dimensional (1-D) periodic microstructure and a light-emitting zinc oxide (ZnO) thin film on a silicon (Si) substrate using a simple process with two-beam interference lithography ...
Oji Matsumoto   +7 more
doaj   +1 more source

Suppression Method of Partial Discharge Interferences Based on Singular Value Decomposition and Improved Empirical Mode Decomposition

open access: yesEnergies, 2021
Partial discharge detection is an important means of insulation diagnosis of electrical equipment. To effectively suppress the periodic narrowband and white noise interferences in the process of partial discharge detection, a partial discharge ...
Linao Li, Xinlao Wei
doaj   +1 more source

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