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Sunghae Jun
In big data analysis, various zero-inflated problems are occurring. In particular, the problem of inflated zeros has a great influence on text big data analysis. In general, the preprocessed data from text documents are a matrix consisting of the documen...
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Daiho Uhm and Sunghae Jun
Due to the expansion of the internet, we encounter various types of big data such as web documents or sensing data. Compared to traditional small data such as experimental samples, big data provide more chances to find hidden and novel patterns with big ...
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Monika Arora and N. Rao Chaganty
Count data with excessive zeros are ubiquitous in healthcare, medical, and scientific studies. There are numerous articles that show how to fit Poisson and other models which account for the excessive zeros. However, in many situations, besides zero, the...
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Cheol-Eung Lee, Sang Ug Kim
Pág. 1 - 20
Several natural disasters occur because of torrential rainfalls. The change in global climate most likely increases the occurrences of such downpours. Hence, it is necessary to investigate the characteristics of the torrential rainfall events in order to...
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Rodrigo A. Fuentes, Ariel R. Soto
Pág. 171 - 179
Innovations are divided into four types: product, process, marketing and organizational (OECD, 2007). An extensive body of literature on the introduction of technological innovations in Chilean agricultural firms focuses on PP (product and process), but ...
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