Μια πολυκριτήρια προσέγγιση για την ενίσχυση των...

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  • 1. & - . , . , N. 8 , , 8-10 2011,

2. - (peer-assessment) Topping (1998), - , , , , . , - , , projects. 3. - (Gielen et al, 2011). (Taras, 2002; Carless et al, 2006). (Topping, 1998; Pryor & Lubisi, 2002). (Kwan & Leung, 1996). - (Searby & Ewers, 1997). (Hattum-Janssen & Lourenco, 2006). (Hanrahan & Isaacs, 2001). (Sadler and Good, 2006). 4. - / . , ( ). 5. [Felder, R., Brent, R., (2003). Journal of Engineering Education, vol. 92(1)] 6. - (Lin, Liu, and Yuan, 2001). - . Lan, Graf, Lai & Kinshuk (2011) (assessment bias) . NePAS (Negotiation-based Peer Assessment System). Jian Ma and Duanning Zhou (2000), , . 7. peer-assessment ( ) 6 ( ) 3 ( , , ) 1 5 : , , , , 2010: 38 - 2011: 19 - : 57 : 8. () . 1 2 1 3 3 4 9. UTA* ARg1g2 1 2 31 2 1 . . 43 5 63 4 i=1wij ui ( gij 1) ui ( gij ) 0,g3 . i=2 . k=1 k=2 k=3k=4 i=3k=5 k=6 [ ( k ) ( k )] [min] z 1 subject to (a , a ) if ak ak 1 k k 1 k if ak ak 1 ( ak , ak 1 ) 0 n ai 1 wij 1 i 1 j 1 wij 0, ( k ) 0, ( k ) 0 i, j and k i 1, 2,..., nand j 1, 2,..., ai 1ui ( g1 ) 0 i 1, 2,..., n i j 1 j wit i 1, 2,..., n and j 2,3,..., ai 1 ui ( gi ) t 1 (ak , ak 1) u[g(ak )] ( ) ( ) u[g(a 1)] ( 1) ( 1) ai 1Post-optimality analysisui ( gi* ) wijj 1mi 1,2,..., n[ (a ) (a )] z kk 1*k9 10. Global k-means Global k-means1655141. k1 .4k1103 SSE1. k-means k1 126k k2 1 k3k482k1k343. k=22 04. 1k21k20 2 0 031 142 23 35 6 748 45 5910[Likas A., Vlassis N., Verbeek J., Pattern Recognition, vol. 36(2), 451--461,2003]10/51 11. Silhouette silhouette0.90.850.80.75ALL 20110.720100.650.6 23456789 1 si 1 s(i) 1 a(i ) / b(i ), a(i) b(i) s(i ) 0, a(i ) b(i ) b(i ) / a(i ) 1, a(i ) b(i ) 12. 100%2010 (38 )80%2011 (19 )60%100%40%80%20%60%0%61145640% 12345678 20% 0%ALL (57 )1100% 80% 60% 40% 20% 0% 1234567823678 13. (: 57 )52 254% 9% 38% 34% 93% 4% 9% 27% 65%103% 49% 49% 100% 0% 0%291 544% 46% 10% 33% 34% 33% 2% 4% 94% 14. 15. - , . - , . , . & . : . (6): . (4): & . (5): . 16. , (. , 2011). -. , , -, .