Search results for "Polis"

A Review of Multiple Try MCMC algorithms for Signal Processing

2018

Many applications in signal processing require the estimation of some parameters of interest given a set of observed data. More specifically, Bayesian inference needs the computation of {\it a-posteriori} estimators which are often expressed as complicated multi-dimensional integrals. Unfortunately, analytical expressions for these estimators cannot be found in most real-world applications, and Monte Carlo methods are the only feasible approach. A very powerful class of Monte Carlo techniques is formed by the Markov Chain Monte Carlo (MCMC) algorithms. They generate a Markov chain such that its stationary distribution coincides with the target posterior density. In this work, we perform a t…

Adaptive independent sticky MCMC algorithms

2018

In this work, we introduce a novel class of adaptive Monte Carlo methods, called adaptive independent sticky MCMC algorithms, for efficient sampling from a generic target probability density function (pdf). The new class of algorithms employs adaptive non-parametric proposal densities which become closer and closer to the target as the number of iterations increases. The proposal pdf is built using interpolation procedures based on a set of support points which is constructed iteratively based on previously drawn samples. The algorithm's efficiency is ensured by a test that controls the evolution of the set of support points. This extra stage controls the computational cost and the converge…

Grapham: Graphical models with adaptive random walk Metropolis algorithms

2008

Recently developed adaptive Markov chain Monte Carlo (MCMC) methods have been applied successfully to many problems in Bayesian statistics. Grapham is a new open source implementation covering several such methods, with emphasis on graphical models for directed acyclic graphs. The implemented algorithms include the seminal Adaptive Metropolis algorithm adjusting the proposal covariance according to the history of the chain and a Metropolis algorithm adjusting the proposal scale based on the observed acceptance probability. Different variants of the algorithms allow one, for example, to use these two algorithms together, employ delayed rejection and adjust several parameters of the algorithm…

High efficiency frequency doubling in fully diced LiNbO3ridge waveguides on silicon

2016

Nonlinear periodically poled ridge LiNbO3 waveguides have been fabricated on silicon substrates. Components are carved with only the use of a precision dicing machine without the need for grinding or polishing steps. They show efficient second harmonic generation at telecommunication wavelengths with normalized conversion reaching 204%/W in a 15 mm long device. The influence of the geometrical non uniformities of waveguides due to fabrication processes is asserted. Characteristics of the components are studied; notably their robustness and tunability versus temperature.

Financial and fiscal shocks in the great recession and recovery of the Spanish economy

2020

In this paper we develop and estimate a new Bayesian DSGE model for the Spanish economy that has been designed to evaluate different structural reforms. The small open economy model incorporates a banking sector, consumers and entrepreneurs who accumulate debt, and a rich fiscal structure and monopolistic competition in products and labor markets, for a country in a currency union, with no independent monetary policy. The model can be used to evaluate ex-ante and ex-post policies and structural reforms and to decompose the evolution of macroeconomic aggregates according to different shocks. In particular, we estimate the contribution of financial and fiscal shocks to both the crisis of the …

Jaunas iezīmes un pretrunu pieaugums mūsdienu kapitālisma ekonomikā. 1.sējums

1977

Rakstu krājums domāts tiem, kas interesējas par kapitālisma politisko ekonomiju.

Arnold Zweig - Aufnahme in Polen

2016

Śląski niemieckojęzyczny autor – Arnold Zweig – zajmował się do końca swojego życia traumatycznym okresem I wojny światowej i napisał wiele dzieł poświęconych tej tematyce. Artykuł ten w pierwszej kolejności prezentuje zainteresowanie osobą Arnolda Zweiga w Polskiej Republice Ludowej oraz opisuje recepcję tłumaczeń jego powieści autorstwa nieżyjącej już tłumaczki Wandy Kragen. W drugiej części niniejszej publikacji autorka skupia się na scharakteryzowaniu powieści „Junge Frau von 1914“ (Młoda kobieta z roku 1914).

Robotic assistance for industrial sanding with a smooth approach to the surface and boundary constraints

2021

[EN] Surface treatment operations, such as sanding, deburring, finishing, grinding, polishing, etc. are progressively becoming more automated using robotic systems. However, previous research in this field used a completely automatic operation of the robot system or considered a low degree of human-robot interaction. Therefore, to overcome this issue, this work develops a truly synergistic cooperation between the human operator and the robot system to get the best from both. In particular, in the application developed in this work the human operator provides flexibility, guiding the tool of the robot system to treat arbitrary regions of the workpiece surface; while the robot system provides…

Cultura, saber social y pedagogía ciudadana

2004

Nouveau dictionnaire français, allemand et polonais

1772

Vārdnīcas teksts paralēlās slejās, franču, vācu un poļu valodā.