Optimal experimental conditions for Welan gum production by support vector regression and adaptive genetic algorithm

Abstract

Welan gum is a kind of novel microbial polysaccharide, which is widely produced during the process of microbial growth and metabolism in different external conditions. Welan gum can be used as the thickener, suspending agent, emulsifier, stabilizer, lubricant, film-forming agent and adhesive usage in agriculture. In recent years, finding optimal experimental conditions to maximize the production is paid growing attentions. In this work, a hybrid computational method is proposed to optimize experimental conditions for producing Welan gum with data collected from experiments records. Support Vector Regression (SVR) is used to model the relationship between Welan gum production and experimental conditions, and then adaptive Genetic Algorithm (AGA, for short) is applied to search optimized experimental conditions. As results, a mathematic model of predicting production of Welan gum from experimental conditions is obtained, which achieves accuracy rate 88.36%. As well, a class of optimized experimental conditions is predicted for producing Welan gum 31.65g/L. Comparing the best result in chemical experiment 30.63g/L, the predicted production improves it by 3.3%. The results provide potential optimal experimental conditions to improve the production of Welan gum.

Digital models of naive, adaptive and rational expectations of regional agriculture forecasting

“…Variable yt can be found using equation yt  ω0  ω1x t*  ut , (11), where variable x t*  F(x* t , lt1) . (12) Estimation procedure for rational expectations model is as follows:…”

“…Later, this field of expertise was developed by P.R. Winters Katsoulacos, 2014) [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11].…”

Synthesis and Application of Tackifying Dispersant Poly (Vinyl Alcohol-Acrylic Acid-Triallyl Cyanate)

“…Adding a small amount of thickener to the required thickening system can significantly increase the apparent viscosity of the system. At present, thickeners are widely used in oil exploitation [ 3 ], agriculture [ 4 ], food processing [ 5 ], daily chemical products [ 6 ], textile printing and dyeing [ 7 ], the pharmaceutical industry, and other fields [ 8 , 9 , 10 , 11 ]. With the development of industry, the variety of thickeners is gradually increasing, among which cellulose [ 12 ] and polyacrylic acid thickeners [ 8 ] are the most widely used.…”

“…At present, thickeners are widely used in oil exploitation [ 3 ], agriculture [ 4 ], food processing [ 5 ], daily chemical products [ 6 ], textile printing and dyeing [ 7 ], the pharmaceutical industry, and other fields [ 8 , 9 , 10 , 11 ]. With the development of industry, the variety of thickeners is gradually increasing, among which cellulose [ 12 ] and polyacrylic acid thickeners [ 8 ] are the most widely used. At present, with the thickener market being well established, domestic and foreign researchers have begun to devote themselves to the research of various modified thickeners.…”

Carboxylic modification of welan gum

“…Those are the contributing factors for the property difference . For a better performance of welan gum as thickening agent in drilling liquid, several attempts have been taken to modify welan gum and many researches have been done . For example, Baird, T. T. K. enhanced solubility of welan gum in ethylene glycol by adding alkaline sequestrant or alkali to the composition.…”