Search results for "Transform"
showing 10 items of 3975 documents
Uz B-splainiem balstītas augstākas kārtas F-transformācijas
2015
Tiešā F-transformācija ir lineārs attēlojums no universā X (šajā darbā - intervāls [a;b]) definētām nepārtrauktām funkcijām uz vektoru telpu, kur vektora vērtības apraksta funkciju atbilstoši universa X nestriktam sadalījumam. Inversā F-transformācija attēlo tiešās F-transformācijas rezultātā iegūto vektoru par funkciju, kas aproksimē oriģinālo funkciju. Šīs pieejas vispārinājums ir augstākas kārtas F-transformācijas, kad tiešās transformācijas rezultātā iegūst vektoru ar polinomiālām komponentēm. Tiešās un inversās transformācijas īpašības ir būtiski atkarīgas no izvēlētā universa nestriktā sadalījuma. Šajā darbā tiek aplūkotas transformāciju īpašības, kad nestrikto sadalījumu iegūst ar B-…
SEAM PUCKERING EVALUATION METHOD FOR SEWING PROCESS
2014
The paper presents an automated method for the assessment and classification of puckering defects detected during the preproduction control stage of the sewing machine or product inspection. In this respect, we have presented the possible causes and remedies of the wrinkle nonconformities. Subjective factors related to the control environment and operators during the seams evaluation can be reduced using an automated system whose operation is based on image processing. Our implementation involves spectral image analysis using Fourier transform and an unsupervised neural network, the Kohonen Map, employed to classify material specimens, the input images, into five discrete degrees of quality…
Rearrangement of N-(3-pyridyl)nitramine
2009
AbstractContrary to other N-(pyridyl)nitramines, the title compound cannot be rearranged to 3-amino-2-nitropyridine or other isomers. Hypothetical products of its transformation under influence of concentrated sulphuric acid, viz. 3-hydroxypyridine, 3,3′-azoxypyridine and 3,3′-azopyridine, were obtained from 3-nitro- and 3-aminopyridine in oxidation and reduction reactions. N-(3-Pyridyl)nitramine was prepared and rearranged in concentrated sulphuric acid. 3-Hydroxypyridine and 3,3′-azoxypyridine were isolated from the reaction mixture, other products were identified by the HPLC and GCMS methods. The results indicate that N-(3-pyridyl)hydroxylamine is an intermediate formed from N-(3-pyridyl…
Nonlinear dissipation phenomena in optomechanics
2016
Yksikään kvanttisysteemi ei voi olla täysin eristetty ympäristöstään, mikä johtaa informaation välittymiseen systeemin ja ympäristön välillä. Optomekaniikassa, missä tyypillinen tutkittava systeemi on peileistä koostuva optinen kaviteetti yhdistettynä mekaaniseen värähtelijään, systeemin ja ympäristön lineaarisesta kytkennästä johtuvat dissipaatioilmiöt ovat hyvin tunnettuja. Epälineaarisia ilmiöitä ei kuitenkaan ymmärretä yhtä laajasti. Tutkin epälineaarista kytkentää kaviteetin ja lämpökylvyn välillä ja havainnollistan tästä kytkennästä johtuvia ilmiöitä kuten epälineaarista dissipaatiota. Esitän myös optisen kaviteetin epälineaarisen dissipaation oikeuttavan mallin, missä optinen kavitee…
Non-target and biological diversity risk assessment
2008
This chapter discusses the following procedures for risk assessment in Bt cotton using the non-target risk assessment model developed by scientists of the GMO ERA Project ("International Project on GMO Environmental Risk Assessment Methodologies", which is a continuation of the GMO Guidelines Project, which was launched by scientists of the International Organization for Biological Control Global Working Group on "Transgenic Organisms in Integrated Pest Management and Biological Control"): (1) identify relevant functional groups of biological diversity associated with adverse effects, (2) list and prioritize species or ecological processes, (3) identify potential exposure pathways and adver…
Patronizējošu un nosodošu tekstu noteikšana(SemEval 2022 uzdevums)
2022
Darbā tiek apskatīta problēma par nosodošu tekstu noteikšanu, kas ir viens no SemEval 2022 izvirzītajiem uzdevumiem. Tiek apskatīti teksti angļu valodā uz jau gatavas un novērtētas datu kopas. Darba mērķis ir apskatīt iespējamus risinājumus un no izvēlētajiem izstrādāt programmu izmantojot dažādus valodas tehnoloģijas modeļus kuri spētu nolasīt doto datu kopu un atgriezt paredzējumu vai teksts ir nosodošs vai nav, kā arī apkopot informāciju par dažādiem sistēmas uzbūves slāņiem un to darbību. Galvenie modeļi, kuri darbā tiek apskatīti, realizēti un testēti ir BERT, RoBERTA un distilBERT, kā arī Naive Bayes modelis, kurš kalpo kā bāzlīnija salīdzināšanai. Beigās tiek iegūti rezultāti ar katr…
Behavior of e-HRM adoption: empirical evidence form organizations in developing context
2015
Based on Theory of planned behavior (TPB) and diffusion of innovation theory (DIT), present study developed and empirically tested the integrated model of organizational e-HRM adoption. The model consists of four contextual variables such as innovation, individual, organizational and environmental. Data were collected from 212 firms in Sri Lanka by means self-administered questionnaire. Structural model was tested using Partial Least Square. Results indicate that innovation characteristics (relative advantage and compatibility), environmental characteristics (competition), organizational characteristics (top management support) significantly explain the organizational e-HRM adoption intenti…
Modeling epidemics through ladder operators
2020
Highlights • We propose an operatorial model to describe epidemics. • The model describes well the asymptotic numbers of the epidemics. • Ladder operators are used to model exchanges between the “actors” of the system.
‘The best guess for the future?’ Teachers’ adaptation to open and flexible learning environments in Finland
2021
Finnish education has recently experienced reforms with respect to guidelines forming the curriculum framework for basic education and school architecture. Since 2016, all new schools incorporate open and flexible design, at least to some extent. The more open school design challenges the conventional organisation of space and pre-defined structures and interaction practices. This study investigates how teachers both adapt and are affected by new demands for pedagogy, team teaching and teacher-student relationships. Interview data of 21 teachers of six modern schools are reviewed through thematic analysis. The new school layouts provided some incongruence with the teachers’ aims and their p…
Influence of PDA Coating on the Structural, Optical and Surface Properties of ZnO Nanostructures
2020
Polydopamine (PDA) is a new biocompatible material, which has prospects in biomedical and sensor applications. Due to functional groups, it can host wide range of biomolecules. ZnO nanostructures are well known templates for optical sensors and biosensors. The combination of ZnO and PDA results in a change of optical properties of ZnO&ndash