The stress produced during the process of drying had a certain relation with moisture gradient, shrinkage, moisture and stress index.
干燥过程中产生的应力与含水率梯度、干缩量和含水率、应力指标，存在一定的相关关系。
The drying mechanism and technology optimization of spray drying are generally studied by experiments. And spray drying lacks theory research, which affects its technical economic index.
喷雾干燥技术的机理及工艺优化常常只能采用实验的方法来分析和探讨，缺乏理论研究，影响了喷雾干燥的技术经济指标。
The results showed that the fractal dimension is an effective index to quantitatively characterize the complexity of wood interior porosity during the drying process.
结果表明：木材内部孔隙度的分形维数是定量反映干燥过程中木材内部孔隙复杂程度新的有效指标。
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