采用二叉树森林数据结构来描述结构试验的杠杆加载系统，使得杠杆加载系统的配重方案自动化设计成为可能，在此基础之上对加载系统配重方案的优化设计方法进行了研究。
The binary tree forest data structure is used to describe the lever load system of structure tests, which make it be likelihood to design automatically the lever load system counterweight.
浮力天平的测量是利用阿基米德定理，计算出配重物体受到的浮力，再通过杠杆平衡的原理得出配重物体浮力的变化即被测量物体的重量。
Based on Archimedes theorem and lever balance principle, we can calculate the buoyancy's variety of the balance objects. This variable just equals to the weight of the measured object.
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