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ÇѱÛÁ¦¸ñ(Korean Title) |
µ¿Àû ±ÔÄ¢ Àû¿ë ¼ø¼¿¡ ÀÇÇÑ Semi-Naive ¼øȯ ÁúÀÇ Ã³¸® ¹æ¹ý |
¿µ¹®Á¦¸ñ(English Title) |
A Semi-Naive Evaluation Technique Based on the Dynamic Rule-Application Order |
ÀúÀÚ(Author) |
È«±âÇü
ÀÌÀ±ÁØ
Ȳ±Ô¿µ
Ki-Hyung Hong
Yoon-Joon Lee
Kyu-Young Whang
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¿ø¹®¼ö·Ïó(Citation) |
VOL 23 NO. 04 PP. 0361 ~ 0376 (1996. 04) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â, »õ·Î¿î »óÇâ½Ä ¼øȯ 󸮹æ¹ýÀ¸·Î ±ÔÄ¢ÀÇ Àû¿ë ¼ø¼¸¦ ½ÇÇà ½ÃÁ¡¿¡ °áÁ¤ÇÏ´Â µ¿Àû ±ÔÄ¢ Àû¿ë ¼ø¼¿¡ ÀÇÇÑ semi-naive 󸮹æ¹ýÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈÇϴ ó¸®¹æ¹ýÀº »õ·Î¿î semi-naive ¾Ë°í¸®Áò°ú ½ÇÇà ½ÃÁ¡¿¡ ´ÙÀ½¿¡ Àû¿ëÇÒ ±ÔÄ¢À» ¼±ÅÃÇÏ´Â ¼±ÅÃÀü·«µé·Î ±¸¼ºµÈ´Ù. »õ·Î¿î semi-naive ¾Ë°í¸®ÁòÀº µ¿Àû ¼ø¼·Î ±ÔÄ¢À» Àû¿ëÇÏ´õ¶óµµ µ¿ÀÏÇÑ °è»êÀÇ Áߺ¹ÀÌ ¾ø°í, »õ·ÎÀÌ »ý¼±µÈ Æ©ÇÃÀ» ´ÙÀ½ÀÇ ±ÔÄ¢ Àû¿ë¿¡¼ ¹Ù·Î ÀÌ¿ëÇÒ ¼ö ÀÖ´Ù. º» ³í¹®¿¡¼´Â ¼øȯÁúÀÇ Ã³¸®¿¡ ÇÊ¿äÇÑ Àüü ±ÔÄ¢ÀÇ Àû¿ë Ƚ¼ö¿Í °áÇÕ¿¬»êÀÇ ¼ö°¡ ÃÖ¼Ò°¡ µÉ ¼ö ÀÖµµ·Ï ´ÙÀ½¿¡ Àû¿ëÇÒ ±ÔÄ¢À» ¼±ÅÃÇÏ´Â ¼¼ °¡Áö ¼±ÅÃÀü·«À» °³¹ßÇÏ¿´´Ù. ½ÇÇèÀû ºñ±³¸¦ ÅëÇÏ¿© Á¦¾ÈÇÏ´Â µ¿Àû ±ÔÄ¢ Àû¿ë ¼ø¼¿¡ ÀÇÇÑ semi-naive 󸮹æ¹ýÀÌ ±âÁ¸ÀÇ ¼øȯ ó¸® ¹æ¹ý¿¡ ºñÇÏ¿© Àüü ±ÔÄ¢ Àû¿ë Ƚ¼ö¿Í °áÇÕ¿¬»ê Ƚ¼öÀÇ Ãø¸é¿¡¼ ¶Ù¾î³ ¼º´ÉÀ» º¸ÀÓÀ» ½ÇÁõÇÏ¿´´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In this paper, we propose a new fixed point evaluation technique for recursions, which is based on the dynamic rule-application order. In the proposed technique (or simply DYN), the next rule to be applied is determined at run time dynamically. DYN consists of a semi-naive algorithm and a set of selection strategies. The semi-naive algorithm allows dynamic ordering of rule applications and makes tuples generated by a rule application immediately available in the subsequent rule applications. After each rule application, the selection strategies determine the next rule by considering the syntactic structure of recursion and some information about the intermediate result up to the present. We develop these selection strategies so that the total number of rule applications and joins can be reduced. Through experimental comparisons, we show that DYN outperforms the previous evaluation techniques in terms of the total number of rule applications and joins.
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