Results 111 to 120 of about 330,080 (276)

A graph-theoretic method to study the existence of periodic solutions for a coupled Rayleigh system via inequality techniques

open access: yesAdvances in Difference Equations, 2019
In the paper, we are concerned with the existence of periodic solutions for a coupled Rayleigh system. By combining graph theory with coincidence degree theory as well as Lyapunov function method, two new sufficient conditions on the existence of ...
Zheng Zhou, Huaying Liao, Zhengqiu Zhang
doaj   +1 more source

A Quest for the Mechanism of Ultrahigh Resolution SEM Imaging

open access: yesAdvanced Science, EarlyView.
Using Monte Carlo simulations with explicit definitions of SE1 and SE2 align with a cascade secondary electron production model, this work shows that the 3D nanostructure modulated SE2 emission enhances other than to reduce topographical contrast via a “miniature Faraday cup” effect.
Hao Tian Chen   +3 more
wiley   +1 more source

A METHOD FOR DETERMINING RAYLEIGH DAMPING PARAMETERS OF COMPLEX FIELD

open access: yesCivil Engineering Journal, 2019
Rayleigh damping model, which is still adopted by manygeneral finite element programs and widely used in analysis of engineering, leads to the inconformity of the calculating modal damping ratio with the actual modal ...
Huai-feng Wang, Ru-lin Zhang
doaj   +1 more source

POSS Polyimide Composite Sealed Triple‐Junction GaAs Thin‐Film Solar Cell for Long‐Term Low Earth Orbit Serve

open access: yesAdvanced Science, EarlyView.
Ultrathin oxide layer and ultraviolet absorbent are introduced into polyhedral oligomeric silsesquioxane (POSS) polyimide to improve the transmittance conservation and realize near zero mass loss against ultraviolet and atomic oxygen exposures. The POSS polyimide composite sealed triple‐junction GaAs thin‐film solar cell exhibits enhanced endurance of ...
Min Qian   +3 more
wiley   +1 more source

IMPLEMENTASI MULTIPATH FADING RAYLEIGH MENGGUNAKAN TMS320C6713

open access: yesSainteknol, 2016
Karakteristik kanal wireless ditentukan oleh adanya propagasi multipath. Fading Rayleigh dijadikan sebagai pendekatan realistis kondisi kanal pada sistem komunikasi wireless dimana propagasi sinyal non line of sight antara transmitter dan receiver ...
Aryo Baskoro Utomo   +2 more
doaj  

Perspective: Hollow Core Optical Fibres for Ultraviolet and Visible Wavelengths

open access: yesAdvanced Science, EarlyView.
Hollow core optical fibres bypass material constraints that limit optical fibres at ultraviolet and visible wavelengths. However, their challenging fabrication has limited their development, and significant gains in performance remain possible. In this perspective we outline approaches to enable the next generation of fibres for shorter wavelengths ...
Robbie Mears   +5 more
wiley   +1 more source

Capacity analysis over fractional order Rayleigh fading channel under additive white generalized Gaussian noise

open access: yesIET Communications
This study presents an innovative fractional order Rayleigh fading model that can be used for channel capacity estimation in the presence of additive white generalized Gaussian noise.
Mehran Kakavand   +2 more
doaj   +1 more source

Analysis of Dual Heat Sources in a Partially Open Enclosure

open access: yesAdvances in Mechanical Engineering, 2013
In this study a partially open enclosure with two heat sources is examined to determine the Nusselt number along the hot wall. The first part of the study examines the effect of the Rayleigh number ratio on the Nusselt number. The largest Rayleigh number
M. McGarry, James G. Kohl
doaj   +1 more source

Multi‐Scale Structural Effects of External Electrical Fields of Melt Tracks in Laser Powder Bed Fusion

open access: yesAdvanced Science, EarlyView.
Laser material processing is a promising technique for fabricating metal structures. Here, external electric field (EFs) assisted laser processing of metallic powders are investigated. EFs affect the melt tracks through changes in their stability and influence the grain structure in conjunction with laser intensity distribution methods. The EF‐assisted
Ankit Das   +2 more
wiley   +1 more source

MFRWA: A Multi-Frequency Rayleigh Wave Approximation Method for Concrete Carbonation Depth Evaluation

open access: yesBuildings
Carbonation depth is essential to determine the durability and predict the remaining service life of concrete structures. This study proposes a multi-frequency Rayleigh wave approximation method (MFRWA) to evaluate carbonation depth by exploiting the ...
Xiangtao Sun   +5 more
doaj   +1 more source

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