Results 101 to 110 of about 84,910 (313)

Laser Scanning and the Continuous Wavelet Transform for Flatness Control [PDF]

open access: yes, 2015
Current methods for surface flatness control in construction are based on sparse measurements and therefore may lead to inaccurate and imprecise results.
B. Biotteau   +5 more
core   +1 more source

Long‐Range Coordination Environment Modulates Single‐Atom Local States and Systemic Impact on CO2 Photoconversion

open access: yesAdvanced Functional Materials, EarlyView.
Terminal groups on Cu porphyrins modulate the electronic states of single‐atom Cu centers through a long‐range electronic effect, without altering the Cu coordination geometry. Meanwhile, a multi‐descriptor framework is established that incorporates porphyrin regulation, hybrid catalyst properties, and CO2 photoreduction capabilities.
Yi Zhang   +13 more
wiley   +1 more source

Electric Equipment Diagnosis based on Wavelet Analysis

open access: yesEPJ Web of Conferences, 2016
Due to electric equipment development and complication it is necessary to have a precise and intense diagnosis. Nowadays there are two basic ways of diagnosis: analog signal processing and digital signal processing. The latter is more preferable.
Stavitsky Sergey A.   +3 more
doaj   +1 more source

Fractional Wavelet Transform Using an Unbalanced Lifting Structure [PDF]

open access: yes, 2011
In this article, we introduce the concept of fractional wavelet transform. Using a two-channel unbalanced lifting structure it is possible to decompose a given discrete-time signal x[n] sampled with period T into two sub-signals x1[n] and x2[n] whose ...
Y. H. Habiboğlu   +6 more
core   +1 more source

Invisible Polymer Walls Enhance Reorientational Optical Nonlinearity in Oligothiophene‐Doped Liquid Crystals

open access: yesAdvanced Functional Materials, EarlyView.
The polymer wall stabilized dye‐doped liquid crystals (PWLCs) enhance the sensitivity of photoinduced molecular reorientation in dye‐doped LC systems. The PWLC with an invisible polymer wall successfully reduces the threshold intensity and functions as an optical limiter under the incidence of low intensity light laser source.
Junki Yokota   +6 more
wiley   +1 more source

Advances in predictive wavelet transform image coding [PDF]

open access: yes
In this work, it is shown that a fractal image coding can be placed in a conventional predictive framework by using a wavelet representation. This has the significant advantage of simplifying decoding by avoiding iteration and of relating the technique ...
Levy, Ian Karl, Wilson, Roland
core  

Cutting tool tracking and recognition based on infrared and visual imaging systems using principal component analysis (PCA) and discrete wavelet transform (DWT) combined with neural networks

open access: yes, 2015
The implementation of computerised condition monitoring systems for the detection cutting tools’ correct installation and fault diagnosis is of a high importance in modern manufacturing industries. The primary function of a condition monitoring system is
Al-Habaibeh, A, Lotfi, A, Elgargni, M
core   +1 more source

Unraveling the Electronic Structure of Silicon Vacancy Centers in 4H‐SiC

open access: yesAdvanced Functional Materials, EarlyView.
The electronic structure of the silicon vacancy in 4H‐SiC is probed via transient absorption spectroscopy, uncovering previously inaccessible excited states of the quartet and doublet spin channels, including the V2' transition. In combination with theoretical analysis, a comprehensive picture of the electronic structure is established.
Ali Tayefeh Younesi   +9 more
wiley   +1 more source

THE PROBLEM OF CONTOURS IN TRANSFORM IMAGE CODING

open access: yes, 2008
Object contours contribute to a large extent to the perceived quality of an image but are typically quite hard to compress. As a matter of facts, many coding algorithms fail to describe efficiently this information.
Parrilli, Sara
core  

Improving the performance of translation wavelet transform using BMICA [PDF]

open access: yes, 2011
Research has shown Wavelet Transform to be one of the best methods for denoising biosignals. Translation-Invariant form of this method has been found to be the best performance.
Li, Yan, Walters-Williams, Janett
core  

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