Stratification of populations with skewed distribution

The problem of efficient stratification in the case of skewed population is considered.Four stratification methods are examined.A new adjusted geometric stratification method is introduced.This method is compared by simulation with Consumer DNA Test the Dalenius-Hodges cumulative root frequency method, the geometric method proposed by Gunning and H

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Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load

It is known that the center pin of a car body strikes strongly against the lateral displacement stopper of the bogie when the vehicle vibrates widely in the case of earthquake motion with a predominant frequency of over 1.4 Hz.During such movement, and due to considerably large wheel/rail lateral force and bogie rolling, etc., there is a risk of GA

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