现有波群因子的统计研究

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自Goda于1970年提出谱峰度参量Qp以来,迄今表征波群强度的因子己有十多种。对文中提及的较常用的11种因子即以后被称为现有波群因子,各作者都强调自己的优点,但何者为较好,直至目前尚无客观的评价。依据从三个测点获得的111组数据对现有波群因子予以检验,若某一因子在较短的记录长度内有连续三个值且其中最大值和最小值满足:(最大值减最小值)不大干0.005,则被称为稳定的波群因子;若这种因子又满足三个条件,即它在任一序数中出现的次数最多、在整条记录中出现的总次数最多和在整条记录的最初1280s内出现率最大,则被称为较佳波群因子。就检验的个例而言,(波高的)平均连长(L1)和波高与周期的相关系数[RHT(0)]就是这种因子。将这两个因子连结起来,今后称之为联合波群因子.因此,建议以此联合波群因子表征波群强度将会较前人采用的单因子的为好. Since Goda proposed the spectral kurtosis parameter Qp in 1970, there have been more than ten factors that characterize the intensity of the wave group. The more commonly used 11 factors mentioned in this paper are the existing wave group factors. The authors emphasize their own merits. However, what is better is that until now no objective evaluation has been made. The existing wave group factors are tested on the basis of 111 sets of data obtained from three measuring points. If a factor has three consecutive values ​​within a short record length and the maximum and minimum values ​​are satisfied: (the maximum minus minus Value) is not as large as 0.005, it is called a stable wave group factor; if it satisfies three conditions, ie, it has the highest number of occurrences in any ordinal number and the highest total number of occurrences in the entire record And the most frequent occurrence within the first 1280s of the entire record, is referred to as the better wave group factor. In the case of the test, the average continuous length (wave height) (L1) and the correlation between wave height and period [RHT (0)] are such factors. The two factors are linked together in the future called the joint wave group factor. Therefore, it is suggested that the combination of wave group factors to characterize the intensity of wave groups will be better than the previous one.
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