変動する物理量の長期予測値の近似計算法

抄録

Recently calculations of long-term distribution of random variables tend to be carried out extensively. The process of obtaining long-term distribution is somewhat complicated and it is not easy to make even a rough estimation of expected values. Authors have developed a calculation method for given data of ocean waves and have made calculation charts for wave data of North Atlantic Ocean by Walden and those of Northern North Pacific Ocean and South Adjacent Seas of Japan by Yamanouchi and others. If the standard deviations of random variables are obtained for irregular seas, the long-term distribution can easily be obtained by using these charts. Furthermore from these charts quantitative comparison of long-term distributions of North Atlantic Ocean and North Pacific Ocean or those of four seasons on each ocean can easily be made.