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第305章 心乱了(2 / 2)

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于是刚才给沈岚做菜的时候,他脑袋里有点不受控制的想象起来。

而此时,许哲很快就找到了借口:“因为昨天收到了交大邹教授的消息。他告诉我,imag的比赛夺冠了,而且优势非常大。”

沈岚只是稍稍回忆了一下,便说:“就是当初在冬令营的那位副教授吧?我记得你跟我说过,那个比赛,好像是让人工智能去识别图片的。”

许哲点了点头:“对,你也知道,不管计算机现在的性能有多强大,它们是没有理解能力的。就比如说,当照相机拍下我的脸,存到电脑里,它只是把光线转化成了像素,并不知道镜头里的东西是一张人脸。而那个比赛要做的,就是让计算机能分清一张照片里是人脸,还是猫咪,或者别的什么东西。”

沈岚沉吟道:“那就应该做数学模型。比如符合哪些参数的是人脸,符合哪些参数的是猫咪……”

许哲:“传统的办法是这个样子,但真的还不够智能。举个例子,我正脸对着镜头,或者侧脸对着镜头,那参数能一样吗?猫咪的区别就更大了,你听过一种说法吗,就是——猫是一种液体?”

沈岚不由一愣:“猫是液体?”

许哲:“我有空给你分享点视频吧。就是说猫的身体特别柔软,能在碗里或锅里团起来,也能钻到沙发的缝里,形状千奇百怪。人脑总能识别出那是猫咪,但很难用一套参数搞出数学模型。”

沈岚:“那怎么办?”

许哲:“你想啊,人的大脑是怎么识别出来的?就比如说什么是猫,小孩会在大人的教导下一次又一次遇见猫,逐渐掌握‘猫’这个字的含义。如果把小朋友的眼睛当作照相机,识别一次场景就像是按下了相机快门,一个三岁的孩子就相当于拍摄了上亿张照片。”

沈岚:“所以数据量会很大,我明白。但是,仅仅只是很大的数据量,就能完成学习了吗?”

许哲点了点头:“只要设置好神经网络的初始状态,设计好算法,那么,就只需要足够大的数据量了。在足够复杂的系统内,新的模式会自动涌现出来。”

沈岚:“可是涌现的原理呢?这总该有个原理吧?”

许哲:“很遗憾,你想要知道的原理,可能是人脑没法理解的复杂。”

沈岚盯着面前的米饭,陷入了沉思之中。

而许哲小口小口吃着饭菜。虽然今天没做好,但那也是跟以前自己的厨艺水平相比。就今天这顿午餐,哪怕是最失败的那道麻婆豆腐,其实也比唐凌菲爸妈做的还好点。总之,至少还能吃。

沈岚依然盯着那碗米饭,忽然轻声说:“我突然在想一个问题。一粒米不是一碗饭,两粒米也不是,多少粒米加起来,才算是一碗饭呢?”

许哲:“这就要看你怎么定义一碗饭了。”

沈岚抬起头望着他,微笑着说:“人工智能到底算不算智能,也要看我们怎么定义智能。不过我还有个问题。”

许哲:“什么问题?”

沈岚:“除了我,你身边还有谁可以跟你聊这些呢?”

“聊技术和哲学吗?”许哲也笑了,“那还真是,只有你。”

————

(本章完)

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