Where ξ i k could be the grey relational coefficient of xi to x0 in k times, and represents the relative big difference of your comparative sequence xi and reference sequence xo in ‘k’ times to get a parameter i. It'd be needed to employ the service of an experienced https://beckett8zl31.webbuzzfeed.com/31636082/an-unbiased-view-of-how-to-clean-sewage-in-qassim