Search results for "jump"
showing 10 items of 401 documents
A system of conservation laws with discontinuous flux modelling flotation with sedimentation
2019
Abstract The continuous unit operation of flotation is extensively used in mineral processing, wastewater treatment and other applications for selectively separating hydrophobic particles (or droplets) from hydrophilic ones, where both are suspended in a viscous fluid. Within a flotation column, the hydrophobic particles are attached to gas bubbles that are injected and float as aggregates forming a foam or froth at the top that is skimmed. The hydrophilic particles sediment and are discharged at the bottom. The hydrodynamics of a flotation column is described in simplified form by studying three phases, namely the fluid, the aggregates and solid particles, in one space dimension. The relat…
Quantized State-Feedback Stabilization for Delayed Markovian Jump Linear Systems with Generally Incomplete Transition Rates
2014
Published version of an article in the journal: Abstract and Applied Analysis. Also available from the publisher at: http://dx.doi.org/10.1155/2014/961925 open Access This paper is concerned with the robust quantized state-feedback controller design problem for a class of continuous-time Markovian jump linear uncertain systems with general uncertain transition rates and input quantization. The uncertainties under consideration emerge in both system parameters and mode transition rates. This new uncertain model is more general than the existing ones and can be applicable to more practical situations because each transition rate can be completely unknown or only its estimate value is known. B…
Enclosure method for the p-Laplace equation
2014
We study the enclosure method for the p-Calder\'on problem, which is a nonlinear generalization of the inverse conductivity problem due to Calder\'on that involves the p-Laplace equation. The method allows one to reconstruct the convex hull of an inclusion in the nonlinear model by using exponentially growing solutions introduced by Wolff. We justify this method for the penetrable obstacle case, where the inclusion is modelled as a jump in the conductivity. The result is based on a monotonicity inequality and the properties of the Wolff solutions.
Effect of a 3-week body mass reduction program on body composition, muscle function and motor performance in pubertal obese boys and girls
2005
The aim of this study was to investigate the effects of a multidisciplinary body mass reduction (BMR) program on body composition, muscle function and motor performance in 50 obese [mean body mass index (BMI): 35.9+/-5.8 kg/m2] boys and girls aged 12-17 yr (Tanner stage III, IV and V). The hospital-based BMR program combined an energy-restricted diet (1400-1600 kcal), nutritional education, psychological counselling and moderate physical activity (45-60 min/ session; 5 sessions/week; 60-80% of the maximal heart rate) during a 3-week period. Fat mass, fat-free mass, maximal power during jumping and stair climbing as well as maximal strength of the upper and lower limb muscles were quantified…
Microscopic origin of the nonexponential dynamics in a glassy crystal
2003
The origin of the slow relaxation and of the dynamic heterogeneity is studied for an orientation-ally disordered crystal, orthocarborane, composed of quasi-icosahedrally shaped molecules. Multidimensional deuteron magnetic resonance reveals that large jump angles dominate their complex, anisotropic reorientational motion. It involves a sequence of small-angle tilts about locally preferred axes as well as symmetry adapted threefold jumps. The intrinsic dynamics of this glassy crystal is nonexponential and can be fully accounted for in terms of the tilt and jump motion.
Incoherent quasi-elastic neutron scattering in isomeric alcohols
1992
Abstract Incoherent quasi-elastic neutron scattering (IQENS) data on liquid isomeric alcohols normal-pentanol (n-PeOH) and 2-methyl-2-butanol (2M-2BuOH) and on their mixture are presented. The diffusive motion of protons, as a function of temperature, is analyzed in the framework of the random jump diffusion model. The temperature dependence of the parameters obtained confirms the more “fragile” behaviour of the more sterically hindered 2M-2BuOH with respect to that of the linear n-PeOH.
Valuation of Barrier Options in a Black-Scholes Setup with Jump Risk
1999
This paper discusses the pitfalls in the pricing of barrier options approximations of the underlying continuous processes via discrete lattice models. These problems are studied first in a Black-Scholes model. Improvements result from a trinomial model and a further modified model where price changes occur at the jump times of a Poisson process. After the numerical difficulties have been resolved in the Black-Scholes model, unpredictable discontinuous price movements are incorporated.
Lietojumprogrammu saskarnes balstīta tīmekļa izstrādes izpēte un implementācija
2020
Darbā tiek pētīts lietojumprogrammu saskarnes balstīts tīmekļa izstrādes kopums, ir apskatītas lietojumprogrammu saskarnes populārākie veidi un implementācijas, to arhitektūru daudzveidība, integrācijas iespējas un izstrādes pieejas, kas tiek realizētas mūsdienu lietu internetā, lielāko uzmanību pievēršot tīmekļa vietņu balstītajām lietojumprogrammas saskarnēm. Tiek pētīti un salīdzināti REST, WSDL, SOAP, RPC un arī citi mazāk populāri tīmekļa lietojumprogrammas saskarnes risinājuma veidi, visvairāk pievēršot uzmanību REST, kas tika izmantots gala risinājuma implementācijai. Rezultātā tiek definētas priekšrocības, nepilnības, nākotnes perspektīvas un izstrādāts tīmekļa balstīts lietojumprog…
Darba laika uzskaites sistēmas izstrāde
2017
Kvalifikācijas darbs apraksta izstrādātu darba laika uzskaites sistēmu, kas pielāgota konkrēta uzņēmuma vajadzībām. Sistēma tiek izstrādāta iekšējām vajadzībām. Lietojumprogrammā iespējams uzzināt detalizētu informāciju par uzņēmuma darbinieku darba laiku, tādējādi atvieglojot saziņu starp uzņēmuma darbiniekiem un darba laika plānošanu. Sistēmai reģistrēt lietotājus var tikai administrators, nereģistrētiem lietotājiem nav piekļuves sistēmas datiem. Izstrāde ir dokumentēta, iekļaujot prasību specifikāciju, projektējumu un testu.
LEAN principu pielietošana IT uzņēmumos darījumprocesu uzlabošanai
2017
Bakalaura darbā “LEAN principu pielietošana IT uzņēmumos darījumprocesu uzlabošanai” tiek apskatīta LEAN principu pielietošana IT uzņēmumos, galvenie ieguvumi no to pielietošanas, un cik būtiski tie ietekmē darījumprocesus un projektu sekmību. Darba mērķis ir izpētīt populārākas metodes, kas tiek izmantotas IT projektos, lai sekmētu efektīvu programmatūras izstrādes procesu, noteikt to priekšrocības un trūkumus, izpētīt LEAN pieejas principus, tās priekšrocības un iespējamus trūkumus, tās popularitāti, pielietot tās principus IT uzņēmumā, lai noteiktu kā tie ietekmē uzņēmuma darbu un darījumprocesus. Izpētītie LEAN principi tika pielietoti Latvijas IT uzņēmumā, izpētot uzņēmuma darbu un dar…