Classical statistical analyses show significant spatial variability of soil erodibility K values at a scale of small watershed, the variance coefficient of which is 39.94%.
经典统计学方法分析表明，在小流域尺度下土壤可蚀性K值存在很强的空间变异性，其变异系数达39.94%。
Given a kind of Method of the fast PID control with changed scale coefficient for solving the problem of long calculated time with MCU in real-time control system.
针对单片机实时控制系统中pid控制运算时间过长的问题，提出了一种变比例系数快速PID调节法。
A "progressive updating" method of large scale displacement measurement is proposed to avoid the defect of low correlation coefficient caused by large scale displacement.
同时还提出一种“逐步更新”的测量方法，它克服了由于大的位移而导致相关系数偏低的缺点。
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