英语翻译On a daily basis,the income collections system identifie

英语翻译On a daily basis,the income collections system identifies securities on an account-by-account basis on,ex date for an upcoming dividend payable date.我不太明白什么叫做on an account-by-account basis.ex date意为除净日.for an upcoming dividend payable date这个也请帮忙分析一下.