多晶硅锭定向凝固过程的数值模拟

研究了多晶硅锭定向凝固过程中晶体和熔体中的温度分布、固液界面的温度场,并对定向凝固过程进行了数值模拟,对热场对多晶硅晶体生长的影响进行了系统的理论分析和试验验证。     

基于PLS的建模方法

提出用ＰＬＳ建立过程的模型。根据过程的输入输出数据,通过ＰＬＳ确定模型的阶次及参数。仿真表明,此方法是一种有效的算法。     

273.2K至293.2K之间D-葡萄糖、D-果糖和蔗糖在乙醇和水的混合溶剂中的固液平衡

Experimental data on the solubility of D-glucose, D-fructose and sucrose in the mixed solvents composed of water and ethanol from 273.2 to 293.2 K were determined. The solubility of D-glucose, D-fructose and sucrose decreased as the ethanol content increased in the mixed solvent. The solubility of D-glucose, D-fructose and sucrose decreased with decreasing equilibrium temperature. The modified UNIQUAC model, S-UNIFAC model and mS-UNIFAC model were applied to predict the solid-liquid equilibria. The prediction results were compared and discussed. Better prediction accuracy was generated using the modified UNIQUAC model.