In the case here, tha t I just illustrated with the little cart going down the valley, would be exactly the same with regular energy, the equilibrium state is one of lowest energy, right.
在现在所考虑的情况下,我刚才所描述的小车沿着山谷下行,结论会像能量判据一样,平衡态是能量最低的态。
So I'll bring a little bit of extra food. Just in case you run out.
我会多带一点吃的来。以防万一你这儿的东西不够吃。
G P Thompson And it turns out that G.P. Thompson, and I'm sure this wasn't the case, but I like to think of it as a little bit of child rebelling against the father.
结果是他的儿子,我确定不是那种情况,但是我们认为他在小时候,对他的父亲可能有一点叛逆。
And in physics, when physicists want to say "a little bit of," delta they write lower case delta.
在物理里,他们想要表示一点点这个概念时“,常在值前面写。
The cart could be a little ways up the hill, and in this case, it's enthalpy, but again, there would be lots of accessible states.
在这种状态下,小车会稍稍向山坡上移动,在现在考虑的情况下,自由焓决定一切,但是同样有很多可能的状态。
Last thing to say is why would you want to have exceptions? Well, let's go back to that case of inputting a simple little floating point.
最后要讲的是为什么有异常处理?,回到输入一个简单的小浮点数的例子,如果我期望主要是。
And so can we do a little sanity check with the simple case here?
对这个简单的例子我们能不能做完整性检查呢?
.. What I'm going to do now-- let's start out with the case where-- now it's going to get a little bit more complicated if we drop the independence assumption.
我现在要做的是-,让我们从案例开始-,接下来的情况会比刚才的复杂一点,因为我们去掉了“相互独立“这一前提假设。
There was a paper that I wrote with a colleague in globalization and health, and this quote that I--that I'll show you is from that and I'll read it in case it's a little hard to see.
这篇论文是我和一位,研究全球化和健康的同事一起写的,它引用了,我给你们看的就是选自其中,我会给你们念,它不太容易看到
That's a little bit like the case we worried about when we started thinking about the soul view,right?
这就有点像我们刚开始研究灵魂观点时,担心的问题了,对吧?
Let's look a little bit more closely at Genesis 1 to make this case.
让我们再仔细阅读《创世纪》第一章来了解。
And that was the case in our village because there wasn't a bridge across the river, and there was a little boat would take people across this awesome, swirling,dangerous river.
那就是我们村的情况,在河面上没有桥,那儿有一条小船可以载人通过那条,水波滔天的危险的河
so let's think of a case now that's getting a little bit more complicated.
让我们考虑,一个更复杂一点的情况。
In the basic case, oh, took a little while.
实际上,和上次检索-1的时候。
So, for example, if we look at sodium channels, and sodium channels are some of the particularly prevalent ones when we're talking about neurons, if you think about the cell membrane, and this little green cartoon is me trying to show a sodium channel here, and in this case, you can see that it's closed, such that no ions are getting through.
比如,让我们来看一下钠离子通道,钠离子通道是我们会经常遇到的几个之一,在讨论神经元的时候,如果大家想想细胞膜,而这个绿色的小示意图就是我用来表示,钠离子通道的,在这种情况下,大家可以看到它是关闭的,因此没有离子可以通过。
And that in the case of constant volume, U in this case that's my delta u, and then I'll H add my little delta n term to get delta H.
这是在等体情形下,此时的到的是Δ,然后我可以加上Δn的项来得到Δ
So if that's the case doing a quick little calculation, what would the ionization energy be for a 2 p electron in neon?
么请稍微计算一下,氖原子的,2,p,电子的,电离能是多大?
If I look in the binary case, takes a little longer.
这里的输出,告诉我们。
now we're not just talking about 1 photon, 1/2 let's say we shoot them all at the same time at our metal, each of them having some energy that's let's say 1/2 the work function. So, just to take a little bit of an informal survey, who thinks here that we will have an electron that is ejected in this case?
我们现在不仅仅讨论一个光子,它们所具有的能量是功函数的,我们在同一时刻把它们打到金属上,我们做一个不太正式的调查,谁认为这种情况下,一个电子会被打出?
And it's called divide and conquer for the obvious reason. I'm going to divide it up into sub-problems with the hope that those sub-problems get easier. It's going to be easier to conquer if you like, and then I'm going to merge them back. Now, in the binary search case, in some sense, this is a little bit trivial.
因此被称为分治的原因就这么简单,将一个问题分解成一些子问题,并希望这些子问题解决起来比较方便,正如你希望的,求解的过程也会变得简单,下面就是把结果合并起来,现在,在二分搜索的例子里,从某些方面来说,这有点微不足道。
If this happened frequently enough, instead of just a little science fiction story like with the David Smith case, maybe we'd say,yeah,possession is one of these things that needs to be explained.
如果这种事情频繁发生,而不是像David,Smith案例般的科幻故事,也许我们就会说,没错,夺舍是一个亟待解释的事态。
This is our little sanity check, the base case.
这是合法性检查,是基本条件。
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