The thermal decomposition model of flame-retardant flexible PVC is essential for relevant waste management and predicting its fire behavior. In this work, thermal decomposition kinetics of this material was investigat...
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The thermal decomposition model of flame-retardant flexible PVC is essential for relevant waste management and predicting its fire behavior. In this work, thermal decomposition kinetics of this material was investigated via thermogravimetric analysis in non-isothermal conditions. The kinetic analysis was performed using model-free (including Kissinger, Friedman, and advanced Vyazovkin methods) coupled with model-fitting method (Ant Lion Optimization algorithm, ALO). The kinetic parameters obtained from model-free method provide guides for initial guess and search range for ALO. Two different decomposition models are developed and the validations show that second two-step parallel model could better predict experimental data and explain the decomposition process. The performance of ALO is compared with shuffledcomplex (SCE) evolutionalgorithm. The results show that the ALO shows better performance because all solutions from SCE are trapped in local minima. In this way, the ALO could be used as an alternate optimization tool for inverse modeling.
Calibration of complex hydrological models that have many potentially adjustable parameters has long been an important issue in hydrology *** address this challenge,this paper focuses on the development of a wizard-st...
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Calibration of complex hydrological models that have many potentially adjustable parameters has long been an important issue in hydrology *** address this challenge,this paper focuses on the development of a wizard-style visual tool that provides a systematic and simple approach through which hydrologists can easily build up and execute the calibration procedure to obtain optimized parameters of a given *** tool uses a robust optimization algorithm known as the shuffled complex evolution algorithm to implement the step-wise,multiple objective calibration of model ***,the tool provides a model wrapping mechanism to help the user turn an existing model written in other languages into *** assembly that can be integrated by this ***,? in the calibration process,this tool provides an integrated visual environment called work bench to guide the user to build a calibration procedure step by step through the instruction *** application of this tool is demonstrated with a case study that addresses the calibration of a complex conceptual hydrological model containing 16 parameters,and the study area is given for the Shule River basin located in the northwest of *** results show that this tool can greatly enhance the easy-to-use capabilities of visual automatic model calibration and offers a positive prospect of improving the efficiency and effectiveness of current practice in hydrological modeling.
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