3,427 research outputs found
Value Relevance of Financial and Non-Financial Information: Evidence from the Gaming Industry
Using financial and non-financial data from casino gaming firms listed in the United States from 1999–2017, we explore two research questions: (1) Is financial information value relevant to financial markets in the casino gaming industry? (2) Does non-financial information have incremental explanatory power over financial information? In general, we find that accounting numbers can explain a firm’s market value and stock returns in the casino gaming industry, except for accounting accruals, which may behave differently compared to other industries. We also find that non-financial information, such as the number of table games, number of slot machines, and their relative proportion, have significant value relevance in explaining market valuation. Our findings contribute to a better understanding of the value relevance of financial and non-financial information in the casino gaming industry. We also provide analysis of firms characterized by these non-financial attributes.
Keywords: hospitality, casino, gaming, value relevance, table games, slot machines
JEL Code: L83, M19, M4
2-Chloro-N′-(2-hydrÂoxy-4-methoxyÂbenzylÂidene)benzohydrazide
In the title compound, C15H13ClN2O3, the dihedral angle between the two benzene rings is 82.09 (10)° and an intraÂmolecular O—H⋯N hydrogen bond occurs. In the crystal structure, N—H⋯O hydrogen bonds link molÂecules into chains propagating in [100]
Non-orthogonal joint block diagonalization based on the LU or QR factorizations for convolutive blind source separation
This article addresses the problem of blind source separation, in which the source signals are most often of the convolutive mixtures, and moreover, the source signals cannot satisfy independent identical distribution generally. One kind of prevailing and representative approaches for overcoming these difficulties is joint block diagonalization (JBD) method. To improve present JBD methods, we present a class of simple Jacobi-type JBD algorithms based on the LU or QR factorizations. Using Jacobi-type matrices we can replace high dimensional minimization problems with a sequence of simple one-dimensional problems. The novel methods are more general i.e. the orthogonal, positive definite or symmetric matrices and a preliminary whitening stage is no more compulsorily required, and further, the convergence is also guaranteed. The performance of the proposed algorithms, compared with the existing state-of-the-art JBD algorithms, is evaluated with computer simulations and vibration experimental. The results of numerical examples demonstrate that the robustness and effectiveness of the two novel algorithms provide a significant improvement i.e., yield less convergence time, higher precision of convergence, better success rate of block diagonalization. And the proposed algorithms are effective in separating the vibration signals of convolutive mixtures
Advancements in Point Cloud Data Augmentation for Deep Learning: A Survey
Point cloud has a wide range of applications in areas such as autonomous
driving, mapping, navigation, scene reconstruction, and medical imaging. Due to
its great potentials in these applications, point cloud processing has gained
great attention in the field of computer vision. Among various point cloud
processing techniques, deep learning (DL) has become one of the mainstream and
effective methods for tasks such as detection, segmentation and classification.
To reduce overfitting during training DL models and improve model performance
especially when the amount and/or diversity of training data are limited,
augmentation is often crucial. Although various point cloud data augmentation
methods have been widely used in different point cloud processing tasks, there
are currently no published systematic surveys or reviews of these methods.
Therefore, this article surveys and discusses these methods and categorizes
them into a taxonomy framework. Through the comprehensive evaluation and
comparison of the augmentation methods, this article identifies their
potentials and limitations and suggests possible future research directions.
This work helps researchers gain a holistic understanding of the current status
of point cloud data augmentation and promotes its wider application and
development
The relative isoperimetric inequality for minimal submanifolds in the Euclidean space
In this paper, we mainly consider the relative isoperimetric inequalities for
minimal submanifolds in . We first provide, following Cabr\'e
\cite{Cabre2008}, an ABP proof of the relative isoperimetric inequality proved
in Choe-Ghomi-Ritor\'e \cite{CGR07}, by generalizing ideas of restricted normal
cones given in \cite{CGR06}. Then we prove a relative isoperimetric
inequalities for minimal submanifolds in , which is optimal
when the codimension . In other words we obtain a relative version of
isoperimetric inequalities for minimal submanifolds proved recently by Brendle
\cite{Brendle2019}. When the codimension , our result gives an
affirmative answer to an open problem proposed by Choe in \cite{Choe2005}, Open
Problem 12.6. As another application we prove an optimal logarithmic Sobolev
inequality for free boundary submanifolds in the Euclidean space following a
trick of Brendle in \cite{Brendle2019b}.Comment: 18 page
Synergistic effect between ceria and tungsten oxide on WO3–CeO2–TiO2 catalysts for NH3-SCR reaction
AbstractWO3–CeO2–TiO2 catalysts for NO (nitrogen monoxide) reduction by ammonia were prepared by a sol–gel method. The catalysts were characterized by BET, XRD, Raman, NH3/NO adsorption and H2-TPR to investigate the relationships among the catalyst composition, structure, redox property, acidity and deNOx activity. WO3–CeO2–TiO2 catalysts show a high activity in a broad temperature range of 200–480°C. The low-temperature activity of catalysts is sensitive to the catalyst composition especially under low-O2-content atmospheres. It may be related to the synergistic effect between CeOx and WOx in the catalysts. On one hand, the interaction between ceria and tungsten oxide promotes the activation of gaseous oxygen to compensate the lattice oxygen consumed in NH3-SCR (selective catalytic reduction) reaction at low temperatures. Meanwhile, the Brønsted acid sites mainly arise from tungsten oxides, Lewis acid sites mainly arise from ceria. Both of the Brønsted and Lewis acid sites facilitate the adsorption of NH3 on catalysts and improve the stability of the adsorbed ammonia species, which are beneficial to the NH3-SCR reaction
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