誤差積聚
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
誤差積聚(accumulation of errors),又有叫不確定性傳播(propagation of uncertainty),係指一柞變數嘅不確定性(隨機性嘅誤差)影響到基於柞變數嘅函數嘅不確定性;想像一架太空船嘅燃料缸,太空船要監察住自己仲淨低幾多燃料,而廿世紀嘅太空船做法係知道燃料缸滿嗰陣容量係幾多,然後喺每次架船噴燃料嗰時估計問出咗幾多燃料,靠噉嚟計淨低幾多燃料,但噉做有問題-每一次嘅估計都會有個最大可能誤差 ,喺噴咗 次燃料之後,得到嘅估計結果嘅誤差最大可以係成 咁多,即係話誤差會隨住做估計嘅次數「積聚」變到愈嚟愈大[1]。
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