Search results for " Flow"
showing 10 items of 3127 documents
Darbu plānošanas optimizācijas problēmu risināšana ar binārās programmēšanas metodēm
2016
Darbā aprakstītas trīs dažādas flow shop problēmas ar uzdevumu minimizēt kopējo darbu izpildes laiku: permutation flow shop problēma, blocking flow shop problēma un no-wait flow shop problēma. Katrai no problēmām ir atrasts atbilstošais lineārās programmēšanas uzdevums ar veseliem un bināriem mainīgajiem. Problēmu risināšanai ir aprobētas divas klasiskās metodes, ko izmando diskrētās programmēšanas uzdevumiem: Gomorī apgriešanas metode un sazarošanās un robežu algoritms. Skaitliskie aprēķini tika veikti, izmantojot datorprogrammu LPSolve IDE.
Generalized Noise Study of Solid-State Nanopores at Low Frequencies.
2017
Nanopore technology has been extensively investigated for analysis of biomolecules, and a success story in this field concerns DNA sequencing using a nanopore chip featuring an array of hundreds of biological nanopores (BioNs). Solid-state nanopores (SSNs) have been explored to attain longer lifetime and higher integration density than what BioNs can offer, but SSNs are generally considered to generate higher noise whose origin remains to be confirmed. Here, we systematically study low-frequency (including thermal and flicker) noise characteristics of SSNs measuring 7 to 200 nm in diameter drilled through a 20-nm-thick SiNx membrane by focused ion milling. Both bulk and surface ionic curren…
Developments in numerical modelling of cardiovascular fluid dynamics
1998
isotracer: An R package for the analysis of tracer addition experiments
2022
Tracer addition experiments, particularly using isotopic tracers, are becoming increasingly important in a variety of studies aiming at characterizing the flows of molecules or nutrients at different levels of biological organization, from the cellular and tissue levels, to the organismal and ecosystem levels. However, performing rigorous statistical analyses to gain reliable quantitative insights from these experiments often remains challenging. We present an approach based on Hidden Markov Models (HMM) to estimate nutrient flow parameters across a network, and its implementation in the R package isotracer. The isotracer package is capable of handling a variety of tracer study designs, inc…
Application of the DORA 2D Model to some sicilian catchments
2005
ANALYSIS OF THE RELATION BETWEEN THE FLOW “HORIZONTAL” TURBULENCE AND THE BED DEFORMATION
2006
Flow and turbulence characteristics in a vegetated straigth flume
2007
Computation of flow velocity in gravel bed channels
2002
Accurate estimate of flow-velocity profile is of crucial importance both for scientific purposes and for solving numerous engineering problems that include, among others, sediment transport, contaminant transport, flow resistance evaluation. This paper presents a new empirical equation to represent the vertical velocity profile. The proposed equation is essentially a modified form of the well-known logarithm law of the wall and contains three parameters having a clear physical meaning. The applicability of the equation and its accuracy assessment for different hydraulic conditions, including non-uniform conditions, is verified by using experimental data obtained by different sources. The va…
Optical flow estimation from multichannel spherical image decomposition
2011
International audience; The problem of optical flow estimation is largely discussed in computer vision domain for perspective images. It was also proven that, in terms of optical flow analysis from these images, we have difficulty distinguishing between some motion fields obtained with little camera motion. The omnidirectional cameras provided images with large filed of view. These images contain global information about motion and allow to remove the ambiguity present in perspective case. Nevertheless, these images contain significant radial distortions that is necessary to take into account when treating these images to estimate the motion. In this paper, we shall describe new way to comp…