如可以无限细化的FFT - FT方法，二次FFT以及把倍频程应用到声压级测量中，使PDM2000系统更完善。
For example, FFT-FT, two times FFT and octave using in sound measure. All this improvement makes PDM2000 system more perfect.
二是采用带干扰的线性模型，在线性二次型最优控制和线性系统状态观测器的基础上，设计了一种无速度测量非线性鲁棒控制律。
Using the linear model with disturbances, the other law is designed to be robust based on the linear quadratic optimal control and the state observer of linear system.
本文报道利用红外分光光度计和微机系统，采用二次测量技术，测量材料表面法向光谱发射率的基本原理和测试方法。
The experimental principle and the method to measure the normal spectral emittance of materials by infrared spectrophotometer and microcomputer system are presented.
应用推荐