| Author | Message | ||
     venkatarman (venkynir) Senior Member Username: venkynir Post Number: 45 Registered: 3-2004 |
Mr.Caijin kindly speel out the spectral range first.I have worked on Tradional Medicinal powder 200 micron to 1000 micron. I have good correaltion in spectral data.If you post you data with particle size , I can suggest the pretreatment . More the samples good model . | ||
| Caijin Huang (caijin) New member Username: caijin Post Number: 1 Registered: 8-2007 |
I've optimized five equations for rice straw of particle size 5.0, 2.0, 1.5,1.0, and 0.5 mm, respectively. But whether the differnce is significant or not, is still a puzzle to me. Several publications refered to statistical evaluation of equations from different data pretreatments, which were constructed using the same spectral data. As the situation for me differs, differnce among the 5 equations may derive from, 1) particle size; 2)pretreatments adopted; 3)sample number in calibration(i mean actual number used after internal cross validation). Anybody think about it and I am waiting for you. |