Results 21 to 30 of about 2,847,969 (279)

Study on instability discriminating condition and permeability variation of triangle articulated structure in highly inclined goaf

open access: yesEnergy Exploration & Exploitation, 2022
The huge, inclined goaf formed by the mining of steeply inclined and extra thick coal seams has the characteristics of occupying a large space and being subject to complex breaking behavior of its overlying rock structure, especially the rock block ...
Song Qin   +3 more
doaj   +1 more source

Equivalent Rope Length-Based Trajectory Planning for Double Pendulum Bridge Cranes with Distributed Mass Payloads

open access: yesActuators, 2022
The hoisting form in which the payload is hung on the hook by two rigging ropes is widely used in the industry, but it also results in the complex double pendulum dynamic of the bridge crane, making the anti-swing trajectory planning full of challenges ...
Qingxiang Wu, Ning Sun, Xiaokai Wang
doaj   +1 more source

Growth rate of binary words avoiding $xxx^R$ [PDF]

open access: yes, 2015
Consider the set of those binary words with no non-empty factors of the form $xxx^R$. Du, Mousavi, Schaeffer, and Shallit asked whether this set of words grows polynomially or exponentially with length.
Currie, James D., Rampersad, Narad
core   +2 more sources

Equivalent Permeability Distribution for Fractured Porous Rocks: Correlating Fracture Aperture and Length

open access: yesGeofluids, 2020
Estimating equivalent permeability at grid block scale of numerical models is a critical issue for large-scale fractured porous rocks. However, it is difficult to constrain the permeability distributions for equivalent fracture models as these are ...
Tao Chen
doaj   +1 more source

Flow of Some Carboxymethylcellulose Solutions Through Abrupt Axisymmetric Contractions. Experimental Study and Modelling of Shear Thinning and Elongational Effects

open access: yesApplied Rheology, 2003
The focus of this paper will be on the modelling and simulation of contraction flow, with marked aspect ratio β = 6, 9, 12. Two fluid families are considered: a glycerol Newtonian solution and carboxy-methyl-cellulose (CMC) solutions which present ...
Devienne René   +2 more
doaj   +1 more source

Species-Specific Expression of Full-Length and Alternatively Spliced Variant Forms of CDK5RAP2. [PDF]

open access: yesPLoS ONE, 2015
CDK5RAP2 is one of the primary microcephaly genes that are associated with reduced brain size and mental retardation. We have previously shown that human CDK5RAP2 exists as a full-length form (hCDK5RAP2) or an alternatively spliced variant form ...
John S Y Park   +6 more
doaj   +1 more source

Correlation of subfoveal choroidal thickness with axial length, refractive error, and age in adult highly myopic eyes

open access: yesBMC Ophthalmology, 2018
Background Subfoveal choroidal thickness (SFCT) in highly myopic eyes was found to be correlated with increasing age, refractive error (spherical equivalent), and axial length. Which factor is the most significant predictor of SFCT remains controversial.
Bingqian Liu   +8 more
doaj   +1 more source

Effectiveness of 0.01% atropine in anisomyopic children

open access: yesIndian Journal of Ophthalmology, 2023
Purpose: To investigate the change in ocular parameters of anisomyopic children treated with 0.01% atropine. Methods: This retrospective study analyzed the data of anisomyopic children who underwent comprehensive examination at a tertiary eye center in
Azfira Hussain   +3 more
doaj   +1 more source

Inherent length-scales of periodic solar wind number density structures [PDF]

open access: yes, 2008
[1] We present an analysis of the radial length-scales of periodic solar wind number density structures. We converted 11 years (1995–2005) of solar wind number density data into radial length series segments and Fourier analyzed them to identify all ...
Kepko, L.   +2 more
core   +2 more sources

An equivalence relation on a set of words of finite length

open access: yesEuropean Journal of Combinatorics, 2009
In this work, we study several equivalence relations induced from the partitions of the sets of words of finite length. We have results on words over finite fields extending the work of Bacher (2002, Europ. J. Combinatorics, {\bf 23}, 141-147). Cardinalities of its equivalence classes and explicit relationships between two words are determined ...
Yotsanan Meemark, Tassawee Thitipak
openaire   +2 more sources

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