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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ÇÐȸÁö > µ¥ÀÌÅͺ£À̽º ¿¬±¸È¸Áö(SIGDB)

µ¥ÀÌÅͺ£À̽º ¿¬±¸È¸Áö(SIGDB)

Current Result Document : 3 / 3 ÀÌÀü°Ç ÀÌÀü°Ç

ÇѱÛÁ¦¸ñ(Korean Title) µµ·Î ³×Æ®¿öÅ©¿¡ ´ëÇÑ ´ÙÂ÷¿ø ôµµ¹ýÀÇ ºñ±³
¿µ¹®Á¦¸ñ(English Title) Comparison of Multidimensional Scaling Methods for Road Networks
ÀúÀÚ(Author) ³ë¿õ±â   Woong-Kee Loh  
¿ø¹®¼ö·Ïó(Citation) VOL 36 NO. 02 PP. 0003 ~ 0016 (2020. 08)
Çѱ۳»¿ë
(Korean Abstract)
µµ·Î ³×Æ®¿öÅ©(road network)´Â ½Ç¼¼°è µµ·Î »óÀÇ °ü½É ÁöÁ¡µé(points of interest, POIs)°ú ±×µé °£ÀÇ ±³Åë »óȲÀ» ¹Ý¿µÇÑ´Ù. µµ·Î ³×Æ®¿öÅ© ÀÀ¿ëÀº ¸Å¿ì ´Ù¾çÇϸç, ÀÌ·¯ÇÑ ÀÀ¿ë¿¡¼­´Â ±ÙÁ¢¼º °Ë»ö(proximity search)¸¦ ºñ·ÔÇÏ¿©, Áý°è ÃÖ±ÙÁ¢ °´Ã¼(aggregated nearest neighbor, ANN) °Ë»ö, À¯¿¬ÇÑ Áý°è ÃÖ±ÙÁ¢ °´Ã¼ (flexible aggregated nearest neighbor, FANN) °Ë»ö µîÀÌ ¹ß»ýÇÑ´Ù. µµ·Î ³×Æ®¿öÅ© ³»ÀÇ µÎ POI °£ÀÇ °Å¸®´Â ±×µé °£ÀÇ ÃÖ´Ü°æ·Î °Å¸®(shortest-path distance)·Î Á¤ÀǵǸç, ÀÌ ¿¬»êÀº À¯Å¬¸®µå °ø°£ ³»ÀÇ µÎ ÁöÁ¡ °£ÀÇ °Å¸® °è»ê¿¡ ºñÇÏ¿© º¹Àâµµ°¡ ¸Å¿ì ³ô´Ù. µµ·Î ³×Æ®¿öÅ© ³»ÀÇ °¢ POI´Â °Å¸® °ø°£(metric space) ³»ÀÇ ÇϳªÀÇ °´Ã¼·Î ´ëÀÀÀÌ °¡´ÉÇÏ´Ù. ¸¸¾à µµ·Î ³×Æ®¿öÅ© ³»ÀÇ POI¸¦ ±×µé °£ÀÇ °Å¸®°¡ À¯ÁöµÇµµ·Ï À¯Å¬¸®µå °ø°£À¸·Î ¸ÅÇÎÀÌ °¡´ÉÇÏ´Ù¸é ±âÁ¸ÀÇ R-Æ®¸® µî¿¡ ±â¹ÝÇÑ ¾Ë°í¸®ÁòµéÀ» È°¿ëÇÒ ¼ö ÀÖÀ¸¸ç, µÎ POI °£ÀÇ °Å¸® °è»ê ºñ¿ëµµ Å©°Ô ³·¾ÆÁú °ÍÀÌ´Ù. º» ³í¹®¿¡¼­´Â µµ·Î ³×Æ®¿öÅ©¿¡ ´ëÇÏ¿© ÀüÅëÀû MDS (classical MDS), ·£µå¸¶Å© MDS (landmark MDS, LMDS), ±×¸®°í FastMap ¼¼ °¡Áö ´ÙÂ÷¿ø ôµµ¹ý(multidimensional scaling, MDS) ¹æ¹ýµéÀ» Àû¿ëÇÏ¿© À¯Å¬¸®µå °ø°£À¸·ÎÀÇ º¯È¯ ½Ã°£ ¹× Ç°ÁúÀ» ºñ±³ÇÑ´Ù. ÀÌ Áß LMDS´Â ±âÁ¸ÀÇ ¿¬±¸¿¡¼­µµ ±× È¿À²¼ºÀÌ ÀÔÁõµÇ¾úÀ¸¸ç, º» ³í¹®¿¡¼­ÀÇ ½ÇÇè¿¡¼­ µµ·Î ³×Æ®¿öÅ©¿¡ ´ëÇؼ­µµ ¿ì¼öÇÑ ¼º´ÉÀ» º¸¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
A road network consists of points of interest (POIs) and the traffic situations between them in the real world. There are a number of road network applications; they issue many proximity queries, aggregated nearest neighbor (ANN) queries, and flexible aggregated nearest neighbor (FANN) queries. The distance between two POIs in a road network is defined as the shortest-path distance between them, and the computation of the distance has a complexity that is much higher than that of distance computation in a Euclidean space. Each POI in a road network corresponds to an object in a metric space. If the POIs are mapped into the points in a Euclidean space such that their distances are preserved as much as possible, we can harness the existing algorithms using multidimensional index structures like the R-trees and significantly reduce the cost of distance computations when processing diverse queries. In this study, we consider three multidimensional scaling (MDS) methods, namely classical MDS, landmark MDS (LMDS), and FastMap, for mapping POIs in a road network into points in a Euclidean space, and compare the execution time and mapping quality of these methods. Among the methods, LMDS has been proven to be highly efficient in previous studies, and our experiments also demonstrated fast execution and high mapping quality of LMDS for road networks.
Å°¿öµå(Keyword) µµ·Î ³×Æ®¿öÅ©   ´ÙÂ÷¿ø ôµµ¹ý   °Å¸® °ø°£   ·£µå¸¶Å© MDS   road network   landmark MDS   FastMap   multidimensional scaling   metric space  
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