Search results for "PROB"

Hölder regularity for stochastic processes with bounded and measurable increments

2022

We obtain an asymptotic Hölder estimate for expectations of a quite general class of discrete stochastic processes. Such expectations can also be described as solutions to a dynamic programming principle or as solutions to discretized PDEs. The result, which is also generalized to functions satisfying Pucci-type inequalities for discrete extremal operators, is a counterpart to the Krylov-Safonov regularity result in PDEs. However, the discrete step size $\varepsilon$ has some crucial effects compared to the PDE setting. The proof combines analytic and probabilistic arguments.

The link of a finitely determined map germ from R 2 to R 2

2010

Let f: (R2, 0) → (R2, 0) be a finitely determined map germ. The link of f is obtained by taking a small enough representative f: U ⊂ R2 → R2 and the intersection of its image with a small enough sphere Sε1 centered at the origin in R2. We will describe the topology of f in terms of the Gauss word associated to its link.

Coherent conditional probabilities and proper scoring rules

2011

In this paper we study the relationship between the notion of coherence for conditional probability assessments on a family of conditional events and the notion of admissibility with respect to scoring rules. By extending a recent result given in literature for unconditional events, we prove, for any given strictly proper scoring rule s, the equivalence between the coherence of a conditional probability assessment and its admissibility with respect to s. In this paper we focus our analysis on the case of continuous bounded scoring rules. In this context a key role is also played by Bregman divergence and by a related theoretical aspect. Finally, we briefly illustrate a possible way of defin…

The measurement of seasonality for tourism evaluation

2017

Seasonal variations in tourism demand represent one of the most challenging topics in tourism research. After highlighting the main pitfalls which characterize the majority of currently used indices for seasonal amplitude, the present work propose the implementation of a recently discusses a recently proposed index for the measurement of seasonality in tourism, based on the transportation problem approach. An adequate measurement of seasonality is a pre-requisite for the evaluation of the effectiveness of tourism policies aimed at reducing tourism demand imbalance.

The Ti-influence on the tourmaline color

2008

Titanium was examined in different black tourmalines by spectrophotometric analyses in the region between 12500 and 27000 cm-1 (800-370 nm) using a microscope spectrophotometer MPV-5P, Leitz (Germany), and chemically analyzed on an electron microprobe Camebax Microbeam, Cameca (France) in WDS Mode. Fourteen tourmaline samples with their face oriented parallel to the principal axis, cut and polished down to thin sections, showed polarized spectra of two broad absorption bands at approximately 14000 cm-1 (715 nm) and 24000 cm-1 (417 nm). Precision thickness measurements were used to calculate the absorption coefficients α. For the absorption around 24000 cm-1, a linear correlation was observe…

The Equiangular Compass

2012

Transdisciplināras mācīšanās process pārmaiņu izglītībā

2021

Maģistra darba nosaukums “Transdisciplināras mācīšanās process pārmaiņu izglītībā”. Darba mērķis ir, analizējot transdisciplināritātes teoriju, metodoloģiju, praksi izglītībā un pētniecībā, izvērtēt transdisciplināra mācīšanās procesa vadīšanu pārmaiņu izglītībā. Maģistra darbs sastāv no anotācijas latviešu un angļu valodā, ievada, teorētiskās un praktiskās daļas, literatūras, secinājumiem, ieteikumiem, pielikumiem. Teorētiskajā daļā ir 2 nodaļas un 4 apakšnodaļas. Darbā tika analizēta zinātniskā literatūra par transdisciplinaritāti, transdisciplināro pieeju izglītībā, pamatojoties uz problēmsituāciju kā mācīšanās objektu/ tēmu. Empīriskajā daļā maģistra darba autore veica pētījumu, kas pam…

Improving Estimates Accuracy of Voter Transitions. Two New Algorithms for Ecological Inference Based on Linear Programming

2022

The estimation of RxC ecological inference contingency tables from aggregate data is one of the most salient and challenging problems in the field of quantitative social sciences, with major solutions proposed from both the ecological regression and the mathematical programming frameworks. In recent decades, there has been a drive to find solutions stemming from the former, with the latter being less active. From the mathematical programming framework, this paper suggests a new direction for tackling this problem. For the first time in the literature, a procedure based on linear programming is proposed to attain estimates of local contingency tables. Based on this and the homogeneity hypot…

Otrās kārtas parasto diferenciālvienādojumu divpunktu robežproblēmas ar asimetriskām nelinearitātēm

2017

Darbs ir veltīts 2.kārtas parasto diferenciālvienādojumu robežproblēmam. Tiek apskatīta divpunktu robežproblēma ar asimetriskām nelinearitātēm. Ir iegūti rezultāti par atrisinājuma eksistenci un skaitu. Darbā ir paradīts, ka robežproblemu atrisinājumu skaits ir atkarīgs no intervāla garuma.

Minimizing fleet operating costs for a container transportation company

2006

Abstract This paper focuses on a fleet management problem that arises in container trucking industry. From the container transportation company perspective, the present and future operating costs to minimize can be divided in three components: the routing costs, the resource (i.e., driver and truck) assignment costs and the container repositioning costs (i.e., the costs of restoring a given container fleet distribution over the serviced territory, as requested by the shippers that own the containers). This real-world problem has been modeled as an integer programming problem. The proposed solution approach is based on the decomposition of this problem in three simpler sub-problems associate…