In the process of commercial coal testing,the entire cargo is always divided into units for testing,and the test results are combined and weighted to obtain the total reported results for the cargo.The general weighting of the total goods reported is as follows.First,it is weighted by the results of the air dry basis of the unit,and the weight of the examined unit is used as the weight of the weight.We need to calculate the results for the total reported air-dried basis and then convert the results for the different ground states by the results for the air-dried basis.In the course of studying the related problem,we found that weighting the units converted to the air-dry basis state better reflects the true quality index of the entire cargo batch.
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