In the chemical and water treatment industries, it is necessary to achieve maximum contact between solid liquid phase, thus promoting mass heat transfer, obtain a homogeneous solution. Increasing stirring speed most recommended solution in different types of reactors: stirred tank, column, tubular. However, this inadvertently increases energy consumption industry. Determination minimum speed, l...

The SARS-COV2 pandemic had a strong impact on the Romanian and European e-Market, manifested by explosive increase in online sales, especially at beginning of two waves epidemic, spring autumn. Using statistical regressive analysis monthly change volume sales Romania, we propose non-linear regression model growth this commercial sector that take into account economic socials effects three 2020-...

Abstract: In this study an appropriate computational approach was presented for estimating the boiling temperatures of 41 different types of olefins and their derivatives. Based on the guidelines of this approach, several structural indices related to the organic components were applied using graph theory. Meanwhile, in addition to evaluating the relation between the boiling temperatures of ole...