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Errors in forest measuration with Angle gauge are analyzed in this paper based on the data from 414 plots of larch plantation.
本文利用414块人工落叶松林样地实测资料，探讨了角规测树的误差问题。
Focusing on overcome the shortcomings of routine angle gauge using in forest measuration, a new-type angle gauge with the function of correct slope automatically was developed.
针对普通测树角规在森林调查中存在的弊端 ，研究发明了一种能自动改正坡度的新型角规 ，详细介绍了其原理、结构设计及使用方法。
The algorithm of measuring zero-crossings can better solve the problems that the characteristic parameters of the pulse signal are complicated in the time field and the measuration errors are greater.
提出的过零点检测算法，较好解决了脉搏信号时域特征点参数多，分析复杂，误差较大的问题。
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