�?????�????

????:??qq???:?????

??????????????????12?????21?????????????? ???:??????20??????????????21????,????5??????????,200??????????

?-??????????,???????????24??????????,?????????????????,?,???????????????

????????????????-???????,????????,???????????????,?????,??????

???????????,???????21?,?????????????????????2?????????????5?????,?200???????????????????????,???21??????????,????40?????????????

??????????,?50????????????,???????Taleb A.,?????,2006????

????,???????????????,?????????????????20????,?????????????

21??????,??????????????,????????????(????) ???:???

??????????????5??? 200????