I should be able to do nice bell-shaped curves, but it's harder than it looks standing up here; so that's your bell-shaped curve.
我还是挺擅长画钟型曲线的,但站着画真的不太容易,这就是钟型曲线
This is the most famous bell-shaped curve, but there are other ones with different mathematics.
正态分布是最著名的钟形曲线,但仍有其他表达式下的钟形曲线
But it turns out that if you make the voters distributed more realistically, let's say like on a bell-curve shape, it makes actually no difference to the result at all.
但事实上,就算我们让选民分布更符合实际情况,比如说是按钟形分布的,但这实际上对结果没有什么影响
So, if we look at this graph where what we're charting is the internuclear distance, so the distance between these two hydrogen atoms, as a function of energy, -- what we are going to see is a curve that looks like this -- this is the general curve that you'll see for any covalent bond, and we'll explain where that comes from in a minute.
因此,如果我们来看一看这幅曲线图,这里我们画的横坐标是核间距,也就是这两个氢原子之间的距离,纵坐标是能量,我们看到的这是能量关于核间距的曲线-,这是一条普遍的曲线,在研究任何共价键时你都会遇到,我们马上就会解释一下它是怎么来的。
If it's a reversible process, we know the work is the area under the curve.
对可逆过程,功等于p-V图上。
If you run these curves only on non-smokers you get rid of that J at the end of the curve and you get pretty much a function that's to the right of the curve here.
如果仅在不吸烟人群中做统计,那么左末端就不会出现J形曲线,而是会得到一条,从左到右逐渐上升的完美的函数曲线
It's a bell-shaped curve that looks about like that.
大概就是一条这样的钟形曲线
So the normal--the bell-shaped curve in that case for the x/n is going to look something like this.
那么x/n的钟形曲线,大概就会是这个样子
As we know, this line here has twice the slope of the original line of the demand curve, so the slope of this thing is -2b.
我们都知道了,这条线的斜率,是需求曲线斜率的2倍,也就是说它的斜率是-2b
Then, if n = 100--now I'm going to label this x differently, I'm now going to show the normal bell-shaped curve and I'm going to do this from 0 to .4.
如果n=100,现在我得重新标x值,我现在要画正态分布的钟形曲线了,在这儿用0到0.4
Irving Fisher also drew on the curve a production possibility frontier for society, which he made downward-curved.
欧文·费雪还画了一条曲线,代表了社会的生产可能性边界PPF,这是一条向下的曲线
That's a bell-shaped curve, but it's centered exactly on .2.
这是条钟形曲线,它关于x=0.2对称
People have referred to this as a J shaped curve with this little up tick in the left hand side and people--some people have sort of said, well maybe it's not so bad to be overweight because it's not so good to be underweight as well and that's a problem.
人们把这称为J形曲线,最左边有一个向上的弯钩,因此就有人说,也许超重也不一定就是一件坏事,因为体重过轻也不是什么好事,这是个问题
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