[prg191] Re: Âîïðîñ ïîíåéðîñåòÿì
- From: Dmitry Vostokov <vdovdo2@xxxxxxxxx>
- To: prg191@xxxxxxxxxxxxx
- Date: Sat, 1 Jan 2005 13:39:43 -0800 (PST)
ß òîæå íå ïîíèìàþ êàê ïðè ñðåäíåé àáñîëþòíîé
ïîãðåøíîñòè 0.6, â êàæäîé îòäåëüíîé òî÷êå àáñîëþòíàÿ
ïîãðåøíîñòü ðàâíà 5? ß äóìàþ ÷òî îöåíêà êà÷åñòâà
ïîëó÷åííîé íåéðîñåòè çàêëþ÷àåòñÿ â ñðàâíåíèè
óñðåäíåííîé ïî âñåì ïðèìåðàì îøèáêè îáó÷åíèÿ ñ îøèáêîé
òåñòèðîâàíèÿ. Ïðè ýòîì ïîãðåøíîñòü äëÿ íåêîòîðûé
(íåìíîãèõ - íîðìàëüíîå ðàñïðåäåëåíèå) òî÷åê
òåñòèðîâàíèÿ ìîæåò áûòü áîëüøîé, íî äëÿ áîëüøèíñòâà
òî÷åê îøèáêà äîëæíà áûòü íåáîëüøîé.
Íî ýòî ìî¸ ìíåíèå - ïðîãðàììó òî ÿ íå ïèñàë åùå :-)
--- Stepan Murashov <murashov@xxxxxx> wrote:
> Âñåì äîáðîãî âðåìåíè ñóòîê.
>
> ß òóò ëàáó äåëàþ ïî íåéðîñåòÿì è ó ìåíÿ òàêîé
> âîïðîñ: êàê îöåíèòü
> êà÷åñòâî ïîëó÷åííîé íåéðîñåòè? Èìååò ëè ñìûñë
> ïðîâåðÿòü ðàáîòó
> íåéðîñåòè íà îòäåëüíûõ òî÷êàõ, èëè îíà äàåò õîðîøèé
> ðåçóëüòàò òîëüêî
> íà áîëüøèõ âûáîðêàõ äàííûõ? Ïðîñòî ÿ âðîäå íàïèñàë
> ñâîþ íåéðîñåòü, îíà
> âðîäå äàæå ðàáîòàåò :). Ïðè ïðîâåðêå íà 200 òî÷êàõ
> òåñòîâîé âûáîðêè
> ñðåäíÿÿ àáñîëþòíàÿ ïîãðåøíîñòü ñåòè, êàê ïðàâèëî, íå
> ïðåâûøàåò +/-
> 0.6 (îäèí ðàç ïîãðåøíîñòü óïàëà äàæå äî 0.08), íî ÿ
> ïðîáîâàë ïîòîì ñ
> ýòîé ñåòüþ ïîñ÷èòàòü çíà÷åíèÿ â îòäåëüíûõ òî÷êàõ -
> òàê â êàæäîé èç íèõ
> ðåçóëüòàò îòëè÷àåòñÿ îò ýòàëîíà î÷åíü çíà÷èòåëüíî
> (äèàïàçîí ýòàëîííûõ
> çíà÷åíèé îò -10 äî 16, àáñîëþòíàÿ ïîãðåøíîñòü ñåòè
> äîõîäèò ìåñòàìè äî
> +/- 5). Ýòî íîðìàëüíî, èëè ÿ ÷òî-òî íå òàê äåëàþ? Ó
> êîãî åñòü óìíûå
> êíèæêè - ïîìîãèòå, ïëç.
>
> Ñ íàñòóïèâøèì Íîâûì ãîäîì,
> Kiart
>
>
>
__________________________________
Do you Yahoo!?
Yahoo! Mail - 250MB free storage. Do more. Manage less.
http://info.mail.yahoo.com/mail_250
Other related posts:
