Tobacco raw material classifying and grouping method
A technology of classification method and grouping method, which is applied to tobacco, analyzing materials, preparing tobacco, etc., can solve problems such as scientific and reasonable combination standards, and achieve the effect of improving quality and rational utilization
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[0017] In this embodiment, the classification and grouping of flue-cured tobacco leaves of the same year and the same grade in 29 representative points in the tobacco leaf raw material planting area is taken as an example for illustration.
[0018] Step 1): PCA multi-index compression
[0019] Generally speaking, there are many indicators to describe the ecological characteristics of tobacco raw material planting areas, and both geographical and meteorological aspects should be considered. To this end, 10 representative indicators were selected, including altitude, sunshine, accumulated temperature ≥10°C, average temperature in May, July, and September, annual precipitation, precipitation from May to September, longitude, and latitude, and recorded them respectively. X1, X2, ..., X10, see Table 1 for specific data.
[0020] Table 1. Index values of ecological characteristics of representative points
[0021]
[0022] .
[0023] The DPS software was used to conduct prin...
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