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Smith ML, Barnes AJ, Huestis MA (2009)

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This means that longer term usage may go undetected unless another type of testing method is used instead, such as hair follicle analysis which can detect drugs up to 90 days after use depending on the substance being tested for

3 Results 3.1 Model construction and evaluation Based on tobacco leaf sample set, particle swarm optimization algorithm was used to find the optimal parameter combination of SVM, BPNN and RF machine learning models

It is also the largest, with the output end roughly twice as wide as the barrel