980 research outputs found
Employment and Unemployment Transitions in Spain from 1996 to 2005
In this paper, we have studied the employment and nonemployment transitions in Spain from 1996 to 2005. To do so, we have used a multi-state multiepisode duration model and a censored continuous-time Markovian matrix. By using the censored Markovian matrix, we have been able to balance the negative effect that censore has on the estimated parameters. The results obtained suggest that women have a probability of employment six percent lower than men. In addition, we have been able to show that Spanish employees experience three different stages of employment during their first decade in the labor market.Employment and Nonemployment Transitions; Multi-state Multi-episode Duration Model; Hazard Rate; Censored Continuous-time Markovian Matrix
Performing Deep Recurrent Double Q-Learning for Atari Games
International audienceCurrently, many applications in Machine Learning are based on define new models to extract more information about data, In this case Deep Reinforcement Learning with the most common application in video games like Atari, Mario, and others causes an impact in how to computers can learning by himself with only information called rewards obtained from any action. There is a lot of algorithms modeled and implemented based on Deep Recurrent Q-Learning proposed by DeepMind used in AlphaZero and Go. In this document, We proposed Deep Recurrent Double Q-Learning which is an implementation of Deep Reinforcement Learning using Double Q-Learning algorithms and Recurrent Networks like LSTM and DRQN
Detection of emission in the Si i 1082.7 nm line core in sunspot umbrae
We analyze spectropolarimetric sunspot umbra observations taken in the
near-infrared Si i 1082.7 nm line taking NLTE effects into account. The data
were obtained with the GRIS instrument installed at the German GREGOR
telescope. A point spread function (PSF) was constructed using prior Mercury
observations with GRIS and the information provided by the adaptive optics
system of the GREGOR telescope. The data were then deconvolved from the PSF
using a principal component analysis deconvolution method and were analyzed via
the NICOLE inversion code. The Si i 1082.7 nm line seems to be in emission in
the umbra of the observed sunspot after the effects of scattered light are
removed. We show how the spectral line shape of umbral profiles changes
dramatically with the amount of scattered light. Indeed, the continuum levels
range, on average, from 44% of the quiet Sun continuum intensity to about 20%.
The inferred levels are in line with current model predictions and empirical
umbral models. Current umbral empirical models are not able to reproduce the
emission in the deconvolved umbral Stokes profiles. The results of the NLTE
inversions suggests that to obtain the emission in the Si i 1082.7 nm line, the
temperature stratification should first have a hump located at about log tau -2
and start rising at lower heights when moving into the transition region. This
is, to our knowledge, the first time the Si i 1082.7 nm line is seen in
emission in sunspot umbrae. The results show that the temperature
stratification of current umbral models may be more complex than expected with
the transition region located at lower heights above sunspot umbrae. Our
finding might provide insights into understanding why the sunspot umbra
emission in the millimeter spectral range is less than that predicted by
current empirical umbral models
Solving second-order conic systems with variable precision
We describe and analyze an interior-point method to decide feasibility
problems of second-order conic systems. A main feature of our algorithm is that
arithmetic operations are performed with finite precision. Bounds for both the
number of arithmetic operations and the finest precision required are
exhibited
WSAM: Visual Explanations from Style Augmentation as Adversarial Attacker and Their Influence in Image Classification
Currently, style augmentation is capturing attention due to convolutional
neural networks (CNN) being strongly biased toward recognizing textures rather
than shapes. Most existing styling methods either perform a low-fidelity style
transfer or a weak style representation in the embedding vector. This paper
outlines a style augmentation algorithm using stochastic-based sampling with
noise addition to improving randomization on a general linear transformation
for style transfer. With our augmentation strategy, all models not only present
incredible robustness against image stylizing but also outperform all previous
methods and surpass the state-of-the-art performance for the STL-10 dataset. In
addition, we present an analysis of the model interpretations under different
style variations. At the same time, we compare comprehensive experiments
demonstrating the performance when applied to deep neural architectures in
training settings.Comment: 8 pages, 10 figure
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