滚筒复烤方式下不同尺寸烟片的干燥与收缩特性对比分析

施用于建筑外檐的装修构件，不仅具有避风、遮阳、调节建筑室内温度的功能，也是建筑外观形象的重要组成部分。虽然现存早期建筑遗构中保存的此类构件很少， 为系统深入研究这些构件的形制和用法带来了一些困难， 但两宋的建筑绘画中保存了相当多当时外檐装修的图像资料，能够补充实物资料的不足。本文即通过对这些图像资料的考察与分析，结合《营造法式》等文献的记载，讨论宋代建筑中常设于建筑外檐，起避风遮阳作用的擗帘竿、 避风?、障日?、引檐四类构件的形制与用法，以及由此产生的丰富多样的建筑外观效果。

Comparison on the drying and shrinkage characteristic of different size tobacco strips by a cylinder dryer

In order to study the drying and shrinkage characteristic of different size tobacco strips during cylinder dryer, redrying experiments of three kinds of tobacco leaves were performed in a lab-scale rotary dryer. The results showed that that the size of tobacco trips had no significant influence on the drying rate and temperature of dried materials. For the tobacco strips with the size more than screen mesh 25.40 mm and the trips with size between screen mesh 12.70 to 25.40 mm, the percentage of samples with the size of 225~625 mm² significantly increased after cylinder redrying. For the tobacco strips with the size between screen mesh 6.35 to 12.70 mm, the percentage of samples with the size of 36~225 mm² significantly increased. After redrying, the overall size distribution of tobacco strips centralized 225~625 mm² and 36~225 mm². Size of tobacco has a great influence on shrinkage rate, and with the increase of size its obviously increased.