So we ask very limited questions, which is why we brag about how accurately we can predict the future.
我们研究的问题是非常有限的,正因如此我们才敢自豪地说,我们能非常精确地预测未来
And then we try and get our simulation to match the past, and hope that that will help it predict the future.
尝试让仿真程序能和这一部分实际数据相符,并且希望它能够帮我们对未来进行预测。
So, we are now going to do one standard problem where we will convince ourselves we can apply this formulas and predict the future given the present.
我们接下来将去研究一个标准问题,通过这个问题,我们能让自己相信,我们能利用这些式子,根据现状,预测未来
The plan, every time, is to predict the future given the present.
无论何时,我们的做法都是根据现状来预测未来
So the question is, "What do you mean by predict the future?
所以问题在于,什么叫预测未来
By "Present," We mean-- we will pick some part of the universe we want to study and we will ask, "What information do I need to know for that system at the initial time, like, right now, in order to be able to predict the future?"
我们所说的"现在",意思是,我们会选取客观世界某一部分来进行研究,然后我们就会问,我们需要什么信息去了解,初始时刻的系统,比如现在,进而能使我们能够预测未来呢
And we can just extrapolate in a straight line We before saw some examples where I had an algorithm to generate points, and we fit a curve to it, used the curve to predict future points and discovered it was nowhere close.
我们可以干脆用一条直线来描述它,我们之前看到在一些例子中,我用一个算法去生成一些点,然后用一条曲线对它进行拟合,然后用这条曲线来预测未来的点,最后却发现结果完全不对。
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