Search results for "python"
showing 10 items of 160 documents
PMT: New analytical framework for automated evaluation of geo-environmental modelling approaches
2019
Geospatial computation, data transformation to a relevant statistical software, and step-wise quantitative performance assessment can be cumbersome, especially when considering that the entire modelling procedure is repeatedly interrupted by several input/output steps, and the self-consistency and self-adaptive response to the modelled data and the features therein are lost while handling the data from different kinds of working environments. To date, an automated and a comprehensive validation system, which includes both the cutoff-dependent and –independent evaluation criteria for spatial modelling approaches, has not yet been developed for GIS based methodologies. This study, for the fir…
On constrained Volterra cubic stochastic operators
2020
We consider constrained Volterra cubic stochastic operators and construct several Lyapunov functions for the constrained Volterra cubic stochastic operators. We prove that such kind operators do no...
On the application of the generalized means to construct multiresolution schemes satisfying certain inequalities proving stability
2021
Multiresolution representations of data are known to be powerful tools in data analysis and processing, and they are particularly interesting for data compression. In order to obtain a proper definition of the edges, a good option is to use nonlinear reconstructions. These nonlinear reconstruction are the heart of the prediction processes which appear in the definition of the nonlinear subdivision and multiresolution schemes. We define and study some nonlinear reconstructions based on the use of nonlinear means, more in concrete the so-called Generalized means. These means have two interesting properties that will allow us to get associated reconstruction operators adapted to the presence o…
Array programming with NumPy.
2020
Array programming provides a powerful, compact and expressive syntax for accessing, manipulating and operating on data in vectors, matrices and higher-dimensional arrays. NumPy is the primary array programming library for the Python language. It has an essential role in research analysis pipelines in fields as diverse as physics, chemistry, astronomy, geoscience, biology, psychology, materials science, engineering, finance and economics. For example, in astronomy, NumPy was an important part of the software stack used in the discovery of gravitational waves1 and in the first imaging of a black hole2. Here we review how a few fundamental array concepts lead to a simple and powerful programmi…
Distributed and Lumped Parameter Models for the Characterization of High Throughput Bioreactors
2016
Next generation bioreactors are being developed to generate multiple human cell-based tissue analogs within the same fluidic system, to better recapitulate the complexity and interconnection of human physiology. The effective development of these devices requires a solid understanding of their interconnected fluidics, to predict the transport of nutrients and waste through the constructs and improve the design accordingly. In this work, we focus on a specific model of bioreactor, with multiple input/outputs, aimed at gen- erating osteochondral constructs, i.e., a biphasic construct in which one side is cartilagi- nous in nature, while the other is osseous. We next develop a general computat…
Fault diagnosis and modeling of the liquids packaging process. A research based on Petri Nets
2008
Searching for solutions to manufacture industries, which every day deal with problems of faults in their process, that generate economics and humans main losses, an algorithm to construct a Petri Nets based model and diagnoser to isolate and fault detection of discrete events systems is presented. This algorithm is developed in a real process of liquids packaging, where we can see that its implementation allows detecting individuals, simultaneous and dependents faults. The process to construct the model and diagnoser is systematic and useful, and it reduces the problems of combinational explosion, which is the main problem present in other investigations. This research has an excellent proj…
Piemērotākās programmēšanas valodas valsts pamatizglītības standartu nodrošināšanā
2022
Bakalaura darbs ir uzrakstīts latviešu valodā uz 42 lapām. Tas satur 12 attēlus un 8 tabulas. Tas sastāv no ievada, 3 nodaļām un nobeiguma ar secinājumiem. Literatūras sarakstā ir 46 nosaukumi un 3 pielikumiem. Darba mērķis izvērtēt un izdarīt secinājumus par piemērotāko programmēšanas valodu pamatizglītības standartu nodrošināšanai. Izanalizējot darba tirgu ir secināms, ka pamatizglītības nodrošināšanai, tiek izmantotas valodas, kas nav pieprasītas darba tirgū un tām programmēšanas algoritmi un pieejas atšķiras no darba tirgū pieprasītajam valodām. Autora ieskatos Python programmēšanas valoda būtu piemērotākā realizējot pamatizglītības programmu, jo Python ir augsta līmeņa atvērtā koda pro…
Ielejveida iegrauzumu ietekme uz pazemes ūdeņu apriti aktīvās ūdens apmaiņas zonā Latvijā
2016
Maģistra darbā pētīta ielejveida iegrauzumu ietekme uz pazemes ūdeņu apriti aktīvās ūdens apmaiņas zonā Latvijas teritorijā, pielietojot hidroģeoloģisko modelēšanu. Pētījumā veikts pazemes ūdens plūsmas daļiņu aprēķins, izmantojot Python programmēšanas valodu un skriptus. Daļiņu ievades punkti gan laterālā, gan vertikālā virzienā tika definēti 3D hidroģeoloģiskā Baltijas Artēziskā baseina modeļa struktūrā. Rezultāti analizēti un attēloti ar datorprogrammu MS Excel un Qgis 2.14.2. Essen palīdzību. Secināts, ka ielejveida iegrauzumi rada ietekmi uz pazemes ūdens aizsargātību un daļiņu migrācijas ātrumu, laiku un veikto distanci, kas pētāmājā teritorijā būtiski atšķiras.
An open-source GA framework for optimizing the seismic upgrading design of RC frames through BRBs
2022
Abstract Optimizing seismic upgrading interventions in reinforced concrete (RC) structures is a difficult task, due to the inner non-linearity of the analyses usually performed. Additionally, it is well known that the displacement demand to the structure depends from the mass and stiffness of the system, and consequently its definition cannot be made a-priori. This paper presents the application of a soft-computing method -i.e. Genetic Algorithm (GA)- for the shaping optimization of code-compliant seismic upgrading interventions on plane RC frames through Buckling-Restrained Braces (BRB). The metaheuristic procedure allows to minimize the cost while ensuring the required safety level, witho…
Aviācijas drošības pārbaudes kontrolpunkta darbības plānošanas optimizācija
2021
Darba mērķis ir piedāvāt labāku prognozēšanas metodi aviācijas drošības pārbaudes kontrolpunktam, kas ļautu veidot un plānot precīzākus kontrolpunkta pārbaudes līniju darba grafikus. Precīzāki darba grafiki ļautu samazināt rindā gaidīšanas laiku, un ļautu pasažieriem ātrāk iziet drošības pārbaudi, bet no uzņēmējdarbības puses netiktu atvērtas pārāk daudz drošības pārbaudes līnijas, tādējādi izmantojot personāla resursu jaudu pilnībā. Tika izmantotas trīs datu kopas – izpildīto reisu datu tabula, pasažieru skenētās iekāpšanas kartes, dati par gaisa kuģu tipiem un to kapacitāti. Darbā ir aprakstīta šo datu kopu detalizēta priekšapstrāde. Plaši pielietojot dažādus vaicājumus tika iegūti jauni …