Results 21 to 30 of about 5,217,955 (289)

A field surveying on the geodetic control of engineering linear structures using a terrestrial laser scanner

open access: yesGeodesy and Cartography, 2019
The method of geodetic control of the road pavement using TLS is presented. The use of the terrestrial laser scanner can avoid some of the disadvantages of classical methods for determining the deformation of objects.
Andrew Pikilnyak   +2 more
doaj   +1 more source

Analytic structure of Bloch functions for linear molecular chains [PDF]

open access: yes, 2006
This paper deals with Hamiltonians of the form $H=-{\bf \nabla}^2+v(\rr)$, with $v(\rr)$ periodic along the $z$ direction, $v(x,y,z+b)=v(x,y,z)$. The wavefunctions of $H$ are the well known Bloch functions $\psi_{n,\lambda}(\rr)$, with the fundamental ...
E. Prodan   +3 more
core   +1 more source

Three-Bar structure optimality criterion using the linear resizing rule

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2021
The static analysis of the indeterminate three-bar structure is developed using the Castigliano's first theorem, taking the lengths and inclination angles as variables. Some reductions are applied in the resulting set of equations to approximate them to
José Alfredo Ramírez-Monares   +1 more
doaj   +1 more source

BRST structure of non-linear superalgebras

open access: yes, 2008
In this paper we analyse the structure of the BRST charge of nonlinear superalgebras. We consider quadratic non-linear superalgebras where a commutator (in terms of (super) Poisson brackets) of the generators is a quadratic polynomial of the generators ...
A. SUGAMOTO   +7 more
core   +1 more source

Vibrational Spectra of a Mechanosensitive Channel [PDF]

open access: yes, 2013
We report the simulated vibrational spectra of a mechanosensitive membrane channel in different gating states. Our results show that while linear absorption is insensitive to structural differences, linear dichroism and sum-frequency generation ...
Birkner J. P.   +37 more
core   +3 more sources

Estimation of Linear and Non-linear Structural Relations [PDF]

open access: yesNature, 1959
THE problem considered by Wayman1 is one example of a wide class of problems which have given rise to a large body of literature in recent years. Lindley2 has reviewed the field, and thirty subsequent papers are listed by Barton and David3. Of particular importance is the estimation of non-linear structural relationships. Several methods for estimating
Barton, D. E., Mallows, C. L.
openaire   +1 more source

Optimal non-linear transformations for large scale structure statistics [PDF]

open access: yes, 2013
Recently, several studies proposed non-linear transformations, such as a logarithmic or Gaussianization transformation, as efficient tools to recapture information about the (Gaussian) initial conditions.
Carron, Julien, Szapudi, Istvan
core   +1 more source

Asymptotic Normality in Linear Regression with Approximately Sparse Structure

open access: yesMathematics, 2022
In this paper, we study the asymptotic normality in high-dimensional linear regression. We focus on the case where the covariance matrix of the regression variables has a KMS structure, in asymptotic settings where the number of predictors, p, is ...
Saulius Jokubaitis, Remigijus Leipus
doaj   +1 more source

Joint Covariance Estimation with Mutual Linear Structure

open access: yes, 2015
We consider the problem of joint estimation of structured covariance matrices. Assuming the structure is unknown, estimation is achieved using heterogeneous training sets.
Soloveychik, Ilya, Wiesel, Ami
core   +1 more source

Crystal structure of Sr2CdPt2 containing linear platinum chains

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2016
The ternary intermetallic title phase, distrontium cadmium diplatinum, was prepared from stoichiometric amounts of the elements at 1123 K for one day. The crystal structure adopts the orthorhombic Ca2GaCu2 structure type in space group Immm.
Effendi Nawawi   +2 more
doaj   +1 more source

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