作為一個電腦從業員,去理解 AI 點運作,係責任。人會因為無知產生恐懼,作為專業人員唔可以。
依家嘅 AI, 基本上係 Neural Network, 簡單嚟講係 Weighted Average. 個 average 就係分類結果嘅信心/準誠度。而分類嘅結果準唔準,就要睇吓啲 Weight 啱唔啱。至於啲 Weight 點搵出嚟,就要有一 set data 去話俾個 Neural Network 知乜嘢係啱,個過程叫做 Training.
最簡單嘅 Neural Network, 例如 OCR 去認英文字同數字,一個 10 x 10 嘅單色圖,1 個 input layer 有 100 個 node, 1 個 output layer 有 62 個 node. 入面有好多數要計 ,當中會用到數學上嘅 Matrix, 所以最理想係用 GPU 計。
多過兩層嘅 Neural Network 就叫做 Deep Network/Learning, 功較就係加入複雜性,例如有一層識得認直線、橫線、斜線,下一層就識得認十字線同交叉線,而圖案嚟講,就係由複雜嘅線條組成,從而去認唔同嘅物件。
無論係唔係 Deep Network, training data 嘅質素係好重要,學電腦第一堂學嘅就係 Garbage In, Garbage Out, 亂教一通嘅話,就係一個亂嚟嘅 AI, 同你亂教一個鬼佬講廣東話粗口當係問候語效果差唔多。
所以 AI 會唔會發展到消滅人,就要睇吓 Neural Network 嘅結構同埋擺乜嘢 data 去 train.
至於 AI 會唔會有自我意識,咁就要睇吓點樣將自我意識呢樣嘢變做 1 同 0 先。
P.S: 點解 QQ 個 Bot 點解會反共,一係假 AI, 一係俾人 feed 咗啲反共 data 去 train, 無其他。
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Thursday, August 3, 2017
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