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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹ÀÎÅͳÝÁ¤º¸ÇÐȸ ³í¹®Áö

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Current Result Document : 6 / 6

ÇѱÛÁ¦¸ñ(Korean Title) ¼¾¼­ ³×Æ®¿öÅ©¸¦ À§ÇÑ PCA ±â¹ÝÀÇ µ¥ÀÌÅÍ ½ºÆ®¸² °¨¼Ò ±â¹ý
¿µ¹®Á¦¸ñ(English Title) A PCA-based Data Stream Reduction Scheme for Sensor Networks
ÀúÀÚ(Author) ¾Ë·º»ê´õ Æäµµ½Ãºê   ÃÖ¿µÈ¯   ȲÀÎÁØ   Alexander Fedoseev   Choi Younghwan   Hwang Eenjun  
¿ø¹®¼ö·Ïó(Citation) VOL 10 NO. 04 PP. 0035 ~ 0044 (2009. 08)
Çѱ۳»¿ë
(Korean Abstract)
µ¥ÀÌÅÍ ½ºÆ®¸²À̶õ »õ·Î¿î °³³ä°ú ±âÁ¸ÀÇ ´Ü¼ø µ¥ÀÌÅÍ »çÀÌ¿¡ Á¸ÀçÇÏ´Â °³³äÀû Â÷À̸¦ ±Øº¹Çϱâ À§Çؼ­´Â ¸¹Àº ¿¬±¸°¡ ÇÊ¿äÇÏ´Ù. ´ëÇ¥ÀûÀÎ ¿¹·Î½á ¼¾¼­ ³×Å©¿öÅ©¿¡¼­ÀÇ µ¥ÀÌÅÍ ½ºÆ®¸² 󸮸¦ µé ¼ö ÀÖ´Â µ¥, À̸¦ À§Çؼ­´Â ´ë¿ªÆøÀ̳ª ¿¡³ÊÁö, ¸Þ¸ð¸®¿Í °°Àº ÀÚ¿øÀû ÇÑ°è¿¡¼­ ºÎÅÍ ¿¬¼Ó ÁúÀǸ¦ Æ÷ÇÔÇÏ´Â ÁúÀÇó¸®ÀÇ Æ¯¼ö¼º±îÁö °í·ÁÇØ¾ß ÇÒ ´ë»óÀÌ ±¤¹üÀ§ÇÏ´Ù. º» ³í¹®¿¡¼­´Â µ¥ÀÌÅÍ ½ºÆ®¸² 󸮿¡¼­ÀÇ ¹°¸®Àû Á¦¾à»çÇ׿¡ ÇØ´çÇÏ´Â ÇÑÁ¤µÈ ¸Þ¸ð¸® ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇØ PCA ±â¹ýÀ» ±â¹ÝÀ¸·Î ÇÏ´Â µ¥ÀÌÅÍ ½ºÆ®¸² Ãà¼Ò ¹æ¾ÈÀ» Á¦¾ÈÇÏ´Ù. PCA´Â »óÈ£ °ü·ÃµÈ ´Ù¼öÀÇ º¯¼öµéÀ» °ü·ÃÀÌ ¾ø´Â ÀûÀº ¼öÀÇ º¯¼ö·Î º¯È¯ÇØÁØ´Ù. º» ³í¹®¿¡¼­´Â ÁúÀÇ Ã³¸® ¿£ÁøÀÇ Çù·ÂÀ» °¡Á¤ÇÏ°í¼­ ¼¾¼­ ³×Å©¿öÅ©ÀÇ ½ºÆ®¸² µ¥ÀÌÅÍ Ã³¸®¸¦ À§ÇØ PCA ±â¹ýÀ» Àû¿ëÇϸç, ´Ù¸¥ ¼¾¼­·ÎºÎÅÍ ¾ò¾îÁø ¸¹Àº ÃøÁ¤°ª »çÀÌ¿¡ ½Ã°ø°£Àû °ü·Ã¼ºÀ» ÀÌ¿ëÇÑ´Ù. ÃÖÁ¾ÀûÀ¸·Î ±×·¯ÇÑ µ¥ÀÌÅÍ Ã³¸®¸¦ À§ÇÑ ÇÁ·¹ÀÓ¿öÅ©¸¦ Á¦½ÃÇÏ°í ´Ù¾çÇÑ ½ÇÇèÀ» ÅëÇÏ¿© ±â¹ýÀÇ ¼º´ÉÀ» ºÐ¼®ÇÑ´Ù.
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(English Abstract)
The emerging notion of data stream has brought many new challenges to the research communities as a consequence of its conceptual difference with conventional concepts of just data. One typical example is data stream processing in sensor networks. The range of data processing considerations in a sensor network is very wide, from physical resource restrictions such as bandwidth, energy, and memory to the peculiarities of query processing including continuous and specific types of queries. In this paper, as one of the physical constraints in data stream processing, we consider the problem of limited memory and propose a new scheme for data stream reduction based on the Principal Component Analysis (PCA) technique. PCA can transform a number of (possibly) correlated variables into a (smaller) number of uncorrelated variables. We adapt PCA for the data stream of a sensor network assuming the cooperation of a query engine (or application) with a network base station. Our method exploits the spatio-temporal correlation among multiple measurements from different sensors. Finally, we present a new framework for data processing and describe a number of experiments under this framework. We compare our scheme with the wavelet transform and observe the effect of time stamps on the compression ratio. We report on some of the results.
Å°¿öµå(Keyword) ¼¾¼­ ³×Æ®¿öÅ©   µ¥ÀÌÅÍ ½ºÆ®¸²   µ¥ÀÌÅÍ °¨¼â   µ¥ÀÌÅÍ ±Ù»çÈ­   ÁÖ¼ººÐ ºÐ¼®   sensor network   data stream   data reduction   data approximation   principal component analysis  
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