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Bacterial polyester poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) and alkaline lignin composites were prepared via melt processing method, and the influence of amorphous lignin on the crystallization behavior and thermal properties of PHBV were investigated. It was found that dual melting peaks appeared in DSC curves of PHBV/lignin composites, while only one single peak existed in PHBV. The...
PID control is the earliest development and the most widely used control strategy in present industrial process control. PID control of proportion, integral and differential is most commonly used control algorithm in industrial applications. This paper introduced the principle of PID controller design. By analyzing the dynamic characteristics of the boiler drum water level, we designed a control scheme...
Water level in boiler drum is nonlinear, large time-varying, strong-coupling and multivariable. On the basis of establishing mathematical model of the regulation of boiler drum water level, fuzzy control theory is used for designing the control system for water level in the boiler drum, fuzzy control and PID control are respectively used for controlling water level in the drum. At the same time, design...
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