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提出一种确定热质扩散系数ａｔ的测定方法。根据反问题原理，在假定前扩散系数ａｍ为含湿量的线性函数、热梯度系数为常数的条件下，利用自行研制的贴附射流式对流蒸发实验装置，对胶凝材料石膏板、加气混凝上砌块等含混多孔材料的热质扩散系数ａｔ的确定进行了测量研究和优化处理；并对多变量寻化时存在多个极值点的情况下，如何获得最优解进行了探讨，最终得到两种适于测试情况的有效方法：（ｌ）合理选初值；（２）利用修改的变量轮换法进行全局优化①。
A method to determine the thermal mass diffusion coefficient at is proposed. According to the principle of inverse problem, under the assumption that the former diffusion coefficient am is a linear function of moisture content and the thermal gradient coefficient is constant, a self-developed affixing jet convection evaporating experimental device is used to add glue to the gypsum board The determination of the thermal mass diffusion coefficient at of the mixed porous block, such as the block on the concrete, is studied and optimized. And how to obtain the optimal solution under the condition of multiple extremum points in the multivariate search , Finally get two kinds of effective methods which are suitable for testing the situation: (1) reasonably choose the initial value; (2) use the modified variable rotation method for global optimization ①.