1,828 research outputs found
ZONING DESIGN FOR HANDÂWRITTEN NUMERAL RECOGNITION
Microsoft, Motorola, Siemens, Hitachi, IAPR, NICI, IUF
In the field of Optical Character Recognition (OCR), zoning is used to extract topological information from patterns. In this paper zoning is considered as the result of an optimisation problem and a new technique is presented for automatic zoning. More precisely, local analysis of feature distribution based on Shannon's entropy estimation is performed to determine "core" zones of patterns. An iterative regionÂgrowing procedure is applied on the "core" zones to determine the final zoning
A PERTURBATIONÂBASED APPROACH FOR MULTIÂCLASSIFIER SYSTEM DESIGN
Microsoft, Motorola, Siemens, Hitachi, IAPR, NICI, IUF
This paper presents a perturbationÂbased approach useful to select the best combination method for a multiÂclassifier system. The basic idea is to simulate small variations in the performance of the set of classifiers and to evaluate to what extent they influence the performance of the combined classifier. In the experimental phase, the Behavioural Knowledge Space and the DempsterÂShafer combination methods have been considered. The experimental results, carried out in the field of handÂwritten numeral recognition, demonstrate the effectiveness of the new approach
A hybrid model for mapping simplified seismic response via a GIS-metamodel approach
In earthquake-prone areas, site seismic response due to lithostratigraphic sequence plays a key role in seismic hazard assessment. A hybrid model, consisting of GIS and metamodel (model of model) procedures, was introduced aimed at estimating the 1-D spatial seismic site response in accordance with spatial variability of sediment parameters. Inputs and outputs are provided and processed by means of an appropriate GIS model, named GIS Cubic Model (GCM). This consists of a block-layered parametric structure aimed at resolving a predicted metamodel by means of pixel to pixel vertical computing. The metamodel, opportunely calibrated, is able to emulate the classic shape of the spectral acceleration response in relation to the main physical parameters that characterize the spectrum itself. Therefore, via the GCM structure and the metamodel, the hybrid model provides maps of normalized acceleration response spectra. The hybrid model was applied and tested on the built-up area of the San Giorgio del Sannio village, located in a high-risk seismic zone of southern Italy. Efficiency tests showed a good correspondence between the spectral values resulting from the proposed approach and the 1-D physical computational models. Supported by lithology and geophysical data and corresponding accurate interpretation regarding modelling, the hybrid model can be an efficient tool in assessing urban planning seismic hazard/risk. © Author(s) 2014
Antioxidative Defense and Fertility Rate in the Assessment of Reprotoxicity Risk Posed by Global Warming
The objective of this review is to briefly summarize the recent progress in studies done
on the assessment of reprotoxicity risk posed by global warming for the foundation of strategic
tool in ecosystem-based adaptation. The selected animal data analysis that was used in this paper
focuses on antioxidative markers and fertility rate estimated over the period 2000–2019. We followed
a phylogenetic methodology in order to report data on a panel of selected organisms that show
dangerous eects. The oxidative damage studies related to temperature fluctuation occurring
in biosentinels of dierent invertebrate and vertebrate classes show a consistently maintained
physiological defense. Furthermore, the results from homeothermic and poikilothermic species in
our study highlight the influence of temperature rise on reprotoxicity
Combining social sciences, geoscience and archaeology to understand societal collapse
Despite its apparently obvious conclusion that adverse environmental conditions must produce economic and institutional crises, the "collapse archaeology" literature has been criticized for its lack of a formal theory, a credible measurement strategy and a proper understanding of the roles of environmental shocks. To tackle this issue, we propose to combine a time inconsistency theory of state formation and evolutiondi.e., state-building, institutional proxies based on this model and highly granular simulated climate data. To clarify our proposal, we apply it to the study of state-building in Bronze Age Mesopotamia, and we show that moderate droughts shaped these economies directly via deteriorated production conditions as well as indirectly via institutional resilience.& COPY; 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Fast COVID-19 vaccine effectiveness estimation on the basis of recovered individual propensity to be vaccinated
The main purpose of this article is to point out to the CDCs of the various governments, as well as to independent agencies and press offices, the need and advantages of correcting incidence data of the infection, as well as to propose a practical equation to calculate vaccine effectiveness, based on the count of recovered subjects who have not yet been vaccinated. This equation can be used to accompany data on infection incidence aimed at the general public, as well as an “easy-to-access” formula to be used for the official and institutional communication of the CDCs
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