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1基于人工鱼群算法的溶液热力学模型及其在真空蒸馏中的应用显示文摘鉴于传统的实验数据优化方法求解溶液热力学模型参数较为困难且效果较差,本文应用人工鱼群算法(AFSA)估算溶液热力学模型参数。采用Java软件编制AFSA下的正规溶液模型、分子相互作用体积模型(M]VM)的模型参数Ω_(ij)、B_(ij)和B_(ij)值的计算程序,以平均偏差S最小作为优化目标,求解了Cd-Zn、Ag-Pb、Bi-Tl、Pb-Sb和In-Sn等分属于强正、弱正、强负、弱负和混合偏差五种类型的真空蒸馏常见的二元合金体系的模型参数,并比较算法优化前后的活度系数预测值和文献值之间的差异。结果表明:AFSA优化后模型的拟合效果均有不同程度的提高,即该算法可合理有效地求解正规溶液模型的参数Ω_(ij)和MIVM的参数B_(ij)和B_(ij)值,提高其在二元合金体系中的适用程度。周岳珍 卢勇 刘大春 陈秀敏 章新 李玮 2015真空科学与技术学报2015,35,11:1
2Application of molecular interaction volume model in separation of Sn-Zn alloy by vacuum distillation显示文摘The activity of components of Sn-Zn binary alloy system was predicted based on the molecular interaction volume model(MIVM). The calculated values are in good agreement with available experimental data of activities, which indicates that this model is of stability and reliability because the MIVM has a good physical basis. The vapor–liquid phase equilibrium of Sn-Zn alloy system in vacuum distillation was calculated as a function of the activity coefficient. The results show that the content of Sn in vapor phase is 4.2×10-7(mass fraction) while in liquid phase it is 90%(mass fraction) at 1 073 K, and the content of Sn in vapor phase increases with increasing the melt temperature and content of Sn in liquid phase. Vacuum distillation experiments were carried out on Sn-Zn alloy for the proper interpretation of the results of the MIVM in the temperature range of 9731 273 K under pressures of 15 200 Pa. The experimental results show that the content of Sn in vapor phase is 5×10-6(mass fraction) while in liquid phase it is 90%(mass fraction) under the operational condition of 1 073 K, 100 min and 15 Pa. The experimental results are in good agreement with the predicted values of the MIVM for Zn-Sn binary alloy system.孔令鑫 杨斌 李一夫 徐宝强 韩龙 刘大春 戴永年 2013Journal of Central South University2013,20,12:0
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