Among them, sampling scheme design is the key factor of effecting CFI data quality.
其中，抽样方案设计是影响森林资源调查数据质量的关键因素。
Third chapter mainly introduces sampling scheme design and calculation of sample size, among which catalogue sampling used in the scheme is introduced by detail.
第三章主要介绍了抽样方案的设计以及样本量的计算。其中对方案中重点用到的目录抽样也给予了较详细的介绍。
The overall design scheme, as well as its principle and characteristics, are presented. With powerful CPLD, the sampling rate and channel number of the system are programmable.
给出了可编程采样系统的整体设计方案，利用CPLD强大的硬件可编程能力实现系统采样频率和采样通道数的可编程设置，介绍了其原理和特点。
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