México en la Obra de Marx y Engels

Estado Actual de la Práctica de la Ingeniería de Software en México

1 Universidad Autónoma de Baja California, Facultad de Ciencias Químicas e Ingeniería, Tijuana, Baja, California, México; 2 Universidad Veracruzana, Facultad de Estadística e Informática, Xalapa, Veracruz, México; 3,7 Universidad Autónoma de Nayarit, Unidad Académica de Economía, Tepic, Nayarit, México; 4 Universidad Nacional Autónoma de México, Facultad de Ciencias, México D.F., México; 5 Univ...

Sur la frequence de leptospirose en Iran

Sur la fréquence de leptospirose en Iran

Mejora de Contraste y Compensación en Cambios de la Iluminación

In this paper a contrast operator built by means of two primitives involving Weber’s Law is presented. The proposed contrast mapping has two objectives, in the first place the contrast enhancement and in the second, the normalization of the processed image. The contrast enhancement is based on the image background detection; this parameter is computed through the analysis of the regional minimu...

Aprendizaje Automático versus Expresiones Regulares en la Detección de la Negación y la Especulación en Biomedicina

In this paper, we present a machine learning system that identify the negation and speculation signals in biomedical texts, in particular, in the BioScope corpus. The objective of this research is to compare the efficiency of this approach focused on machine learning with which it is based on regular expressions. Among the systems that follow the latter approach, we used NegEx because of its av...