Search results for "nlo"
showing 10 items of 285 documents
Properties of EO Active Molecular Glasses Based on Indandione and Azobenzene Chromophores
2012
Continuing previous research of EO active materials we have focused our attention on compounds employing two types of core nonlinear optical (NLO) chromophores – indandione and azobenzene . Coupling of them with bulky triphenyl, pentafluorophenylmethoxy ester, benzyloxy ester molecular fragments, as anti-crystallization agents allows us to obtain amorphous materials for potential NLO applications.
Mixed Finite Elements for multilayered smart plates nonlocal analysis
2022
A mixed finite element formulation for the Eringen’s nonlocal analysis of smart, magneto-electro-elastic, multilayered plates is presented. Finite elements for different refined higher order plate layerwise theories are systematically developed. They ensure interface continuity and allow associating different values of the nonlocal parameter to the laminate layers. Standard 9-node and 16-node isoparametric, quadrilateral finite elements have been implemented and tested, showing the characteristics and limitations of the proposed approach.
Detector-based visual analysis of time-series data
2015
Information Extraction from Binary Skill Assessment Data with Machine Learning
2021
Strength training exercises are essential for rehabilitation, improving our health as well as in sports. For optimal and safe training, educators and trainers in the industry should comprehend exercise form or technique. Currently, there is a lack of tools measuring in-depth skills of strength training experts. In this study, we investigate how data mining methods can be used to identify novel and useful skill patterns from a binary multiple choice questionnaire test designed to measure the knowledge level of strength training experts. A skill test assessing exercise technique expertise and comprehension was answered by 507 fitness professionals with varying backgrounds. A triangulated appr…
Refined layer-wise models for nonlocal analysis of magneto-electro-elastic plates
Size-dependent theories of continuum mechanics are an important tool for structural and material modeling in engineering applications, with particular regard to those involving micro- and nano-scales. Among various approaches proposed in the literature to account for the effect of the microstructure via continuum models, the Eringen’s nonlocal elasticity model incorporates important features of material behavior via a differential stress-strain relationship involving a scale coefficient, or characteristic length, depending on the material microstructure [1]. In the framework of Eringen’s nonlocal elasticity, plate theories have been reformulated for homogeneous and multilayered configuratio…
Sääntöpohjaiset tiedonlouhintamenetelmät ohjelmistojen ymmärtämisen tukena
2013
Teknologian nopean kehityksen myötä digitaalisessa muodossa oleva tietomäärä kasvaa kaikkialla. Tietovarastojen koon kasvaessa tarpeellista tietoa tallennettuun tietomäärään nähden on hyvin vähän ja tärkeän informaation löytäminen on haasteellista. Tähän ongelmaan ratkaisuna on tiedonlouhintatekniikat. Tiedonlouhintaa käytettäessä tavoitteena on löytää datajoukosta uusia tuloksia ja näkökohtia tiettyyn kyseessä olevaan ongelmaan. Tutkielmassa keskitytään ohjelmistoaineistojen louhintaan, jonka avulla voidaan saada hyödyllistä informaatiota ohjelmistoprojektin vaiheista ja siinä tapahtuvista virheistä ja niiden ehkäisemisestä. Rapidly expanding and evolving technology makes digitally stored …
Tekstinlouhinta semanttisen webin metatietojen tuottamisessa
2010
Koivunen, Juuso Oskari Tekstinlouhinta semanttisen webin metatietojen tuottamisessa / Juuso Koivunen Jyväskylä: Jyväskylän Yliopisto, 2010. 26s. Kandidaatintutkielma Tässä tutkielmassa selvitetään kirjallisuuskatsauksen avulla tekstinlouhintajär-jestelmien toimintaa ja mitä haasteita ne kohtaavat. Aineistona on pääasiassa 2000 -luvulla julkaistuja tieteellisiä artikkeleita, konferenssijulkaisuja ja teknis-ten standardien dokumentaatioita. Aihetta on tutkittu huomattavasti, sillä tuo-reita lähteitä löytyy paljon. Semanttisen webin kehityksen ja yleistymisen myötä metatietojen automaatti-nen tuottaminen on ajankohtainen tutkimusalue. Semanttisessa webissä tar-peelliset metatiedot on luotu aie…
Ontologioiden oppiminen tekstistä
2008
Quantitative Approximation Properties for the Fractional Heat Equation
2017
In this note we analyse \emph{quantitative} approximation properties of a certain class of \emph{nonlocal} equations: Viewing the fractional heat equation as a model problem, which involves both \emph{local} and \emph{nonlocal} pseudodifferential operators, we study quantitative approximation properties of solutions to it. First, relying on Runge type arguments, we give an alternative proof of certain \emph{qualitative} approximation results from \cite{DSV16}. Using propagation of smallness arguments, we then provide bounds on the \emph{cost} of approximate controllability and thus quantify the approximation properties of solutions to the fractional heat equation. Finally, we discuss genera…
The Calderón problem for the fractional wave equation: Uniqueness and optimal stability
2021
We study an inverse problem for the fractional wave equation with a potential by the measurement taking on arbitrary subsets of the exterior in the space-time domain. We are interested in the issues of uniqueness and stability estimate in the determination of the potential by the exterior Dirichlet-to-Neumann map. The main tools are the qualitative and quantitative unique continuation properties for the fractional Laplacian. For the stability, we also prove that the log type stability estimate is optimal. The log type estimate shows the striking difference between the inverse problems for the fractional and classical wave equations in the stability issue. The results hold for any spatial di…