figure 597 221 1103 316
equation 525 959 1401 1115
text 297 839 1403 946
text 297 1147 1404 1623
text 297 1754 1402 1881
equation 439 1635 1401 1741
equation 738 1894 1401 1963
text 297 1975 1401 2035
equation 731 756 1401 827
text 297 656 833 743
caption 297 351 1402 598
abstract 297 351 1402 598