Results 41 to 50 of about 787,641 (342)

RECYCLING RECOVERED WOOD-BASED MATERIALS. FLATNESS, MOR AND MOE OF PANELS MADE FROM RECOVERED WOODEN BASED MATERIALS [PDF]

open access: yesPro Ligno, 2015
The objective of the research was to study the mechanical properties of recovered solid wood and wood-based materials, to create new panels made of strips of recovered oak and spruce wood, particleboards and blockboards and to study their mechanical ...
Andrea DEÁK   +3 more
doaj  

Wake Width: Discussion of Several Methods How to Estimate It by Using Measured Experimental Data

open access: yesEnergies, 2021
Several methods of defining and estimating the width of a turbulent wake are presented and tested on the experimental data obtained in the wake past an asymmetric prismatic airfoil NACA 64(3)-618, which is often used as tip profile of the wind turbines ...
Daniel Duda   +2 more
doaj   +1 more source

Flat building blocks for flat silicene [PDF]

open access: yesScientific Reports, 2017
AbstractSilicene is the silicon equivalent of graphene, which is composed of a honeycomb carbon structure with one atom thickness and has attractive characteristics of a perfect two-dimensional π-conjugated sheet. However, unlike flat and highly stable graphene, silicene is relatively sticky and thus unstable due to its puckered or crinkled structure ...
openaire   +2 more sources

Flatness properties of acts over semigroups [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2021
In this paper we study flatness properties (pullback flatness, limit flatness, finite limit flatness) of acts over semigroups. These are defined by requiring preservation of certain limits from the functor of tensor multiplication by a given act. We give
Valdis Laan   +3 more
doaj   +1 more source

Semiconductor Wafer Flatness and Thickness Measurement Using Frequency Scanning Interferometry Technology

open access: yesPhotonics
Silicon (Si) and silicon carbide (SiC) are second- and third-generation semiconductor materials with excellent properties that are particularly suitable for applications in scenarios such as high temperature, high voltage, and high frequency.
Weisheng Cheng   +5 more
doaj   +1 more source

Digital modeling geometrical and macrorough parameters of a highway [PDF]

open access: yesКомпьютерные исследования и моделирование, 2012
Original representation of statistical digital model of measurement of a macroroughness on a local site (to 15) consisting of determined (bias), correlated (standard periodic making and periodic deviations from flatness) and actually casual making ...
Andrei Viktorovich Kochetkov   +1 more
doaj   +1 more source

Generation of Flat Terahertz Noise by Mixing Incoherent Light Fields

open access: yesPhotonics, 2023
Terahertz (THz) noise sources play an irreplaceable role in testing THz devices and evaluating THz application systems, and the flatness of their radio frequency (RF) spectra is an important technical parameter.
Youwen Zhang   +7 more
doaj   +1 more source

Strongly essential flows on irreducible parabolic geometries [PDF]

open access: yes, 2015
We study the local geometry of irreducible parabolic geometries admitting strongly essential flows; these are flows by local automorphisms with higher-order fixed points. We prove several new rigidity results, and recover some old ones for projective and
Melnick, Karin, Neusser, Katharina
core   +1 more source

Flatness, tangent systems and flat outputs

open access: yes, 2023
En esta tesis doctoral se presentan diversos métodos para la linealización de sistemas de control no lineales o para el estudio de la platitud. Se utilizan dos aproximaciones diferentes, en concreto: geometría diferencial y álgebra diferencial.<br/><br/>En el marco de álgebra diferencial, se presenta un estudio de los sistemas lineales de ...
openaire   +5 more sources

Contrast Experiments in Dielectrophoresis Polishing (DEPP)/Chemical Mechanical Polishing (CMP) of Sapphire Substrate

open access: yesApplied Sciences, 2019
The broad applications of sapphire substrates in many fields warrants an urgent demand for a highly efficient and high precision polishing method for the sapphire substrates.
Tianchen Zhao   +5 more
doaj   +1 more source

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