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Fournex, four, Four-dimensional variational assimilation, four thousand three hundred and eighty four, four thousand four hundred and ninety seven, four thousand eight hundred and seventy six, four thousand five hundred and thirty eight, four thousand five hundred and seventy four, four thousand seven hundred and seventy one, four thousand seven hundred and seventy two, four thousand seven hundred and ninety four, four-order nonlinear Schrodinger equation 返回 four-party