Of the 2557 (2014) year depreciation is calculated, but not a full year will be calculated on the full year 2558 (2015) Thus, depreciation in the year 2558 increased from the year before.
Depreciation for the full year 2557 will be calculated not only in the full year 2558 will be calculated. As a result, depreciation expense in 2558 increased from the previous year.
Depreciation of the year 2557 will calculate the full year, but will be calculated in full in 2558. The depreciation in 2558 increase from the previous year.