The Iranian press reported earlier this week that Tehran was ready to accept the general framework of the U.N.draft deal, but was insisting on some "important changes."
VOA: standard.2009.10.28
Bohr said that the angular momentum, mvr where n is this integer counter h over 2 pi.
波尔提及到角动量,是被量化了的,mvr,is,quantized,这里的n等于一个整数乘以h除以2π
And this is now consistent with my claim that I have sorted a list of size N equals 1.
这与我之前所说的是一致的,我已经将N为1的一个序列排好了序。
"This is one of the clearest calls repeatedly rendered to the government of Sri Lanka - that the U.N.be allowed to access the area so we can assess independently the situation of civilians,"
VOA: standard.2009.05.11
Adam will tell us later -- this is in Book Eight when Adam recounts for us the creation of Eve -- that God: op'n'd up my left side, and took he Rib He form'd and fashion'd with his hands.
亚当稍后会告诉我们,在第八册书当亚当让我们想起,夏娃的诞生,上帝说:,打开我的左侧身体,…,他用双手塑造那根肋骨。
So let's just think exactly what this means, and that means that if we take away function and we define it in terms of n, l and m sub l, what we're defining here is the complete description of an orbital.
让我们来考虑一下这是什么意思,这是说如果我们不考虑波函数,而是用n,l,m下标l来定义它,我们定义的,是一个轨道的完整描述。
Now I'm in better shape, right? Especially for really large n or for a lot of k, because now in general, this is going to be smaller than that.
很大的k也大的情况,因为这样这就比这个小了,这种情况是分摊。
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
If I look at something that goes as n squared, if this is the edge of the nucleus here and if this is r1, 4 it says when n goes to two the radius goes to four.
如果在原子核外侧,我们发现某一半径和n的平方成正比,也就是说当n为2时半径等于。
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
That's what this is called by Jan Steen, S-T-E-E-N.
简·施特恩就是这么说的 简S-T-E-E-N
So if on each iteration of merging I'm doing eight things or more generally, N. That then begs the question, how many levels of this tree are there actually?
可见对于合并我需要迭代8次,一般情况下是N,这取决于具体问题,那么在这棵树中一共有多少层呢?
It says that function, f of x, is bounded above here's an upper limit on it, that this grows no faster than quadratic in n, n squared.
这意味着这个方法f是有上限的,这个方法增长的速度,不会比括号内的n*n快。
And if that is the energy to go from n equals one n=2 this is the amount of energy that has to be left as kinetic energy of the electron.
如果这个能量是从n=1到,然后,to,n,equals,two,then,这些能量,会作为电子的动能,被消耗掉。
And in this case, we go from 8 to 4 to 2 to 1 three times and then on each iteration of this algorithm, each pass across the board I'm touching N numbers, so that means I'm doing N things, log N times.
在这个例子中,我们从8得到4,到2,再到1,是3次,在这个算法的每次迭代中,每一趟我都会操作N个数,也就是所我每次要做N步操作,一共要做,log,N,次。
So we know that we can relate to z effective to the actual energy level of each of those orbitals, and we can do that using this equation here where it's negative z effective squared r h over n squared, we're going to see that again and again.
我们知道我们可以将有效电荷量与,每个轨道的实际能级联系起来,我们可以使用方程去解它,乘以RH除以n的平方,它等于负的有效电荷量的平方,我们将会一次又一次的看到它。
So this tells me that this is n equals one.
所以它告诉我们n等于。
The order complexity here, if I actually write it would be-- sorry, order n times m, and if m was equal to n, that would be order n squared, and this is quadratic.
如果m等于n的话,也就是n的平方,这是一个平方复杂度的问题,这是和前面不同类型的,好,我在做什么呢?
So, for example, we could talk about the n equals 2 state, so that's this state here, and it's also what we could call the first excited state. So we have the ground state, and if we excite an electron into the next closest state, we're at the first excited state, or the n equals 2 state.
例如,我们可以考虑n等于2的状态,它在这里,它也被称作是第一激发态,我们有基态,如果我们把一个电子,激发到它最近邻的态,那就是第一激发态,或者n等于2的态。
So, if we just rearrange this equation, what we find is that z effective is equal to n squared times the ionization energy, IE all over the Rydberg constant and the square root of this.
我们可以发现有效的z等于n的平凡,乘以电离能除以里德堡常数,这些所有再开方,所以等于n乘以,除以RH整体的平方根。
Once I have it sorted I can search it in log n time, but that's still isn't as good as just doing n. And this led to this idea of amortization, which is I need to not only factor in the cost, but how am I going to use it?
一旦对其完成排序,就可以在log,n的时间内对其完成搜索,但是这样做仍然不如n的复杂度,这样做引出了耗时分摊的想法,这时不仅需要考虑耗时的因素?
I think most and you are familiar with the Aufbau or the building up principle, you probably have seen it quite a bit in high school, and this is the idea that we're filling up our energy states, again, which depend on both n and l, one electron at a time starting with that lowest energy and then working our way up into higher and higher orbitals.
我认为你们大多数熟悉奥弗堡,或者构建原理,你们可能,在高中见过它,又一次,这是我们填充能级的观点,与n和l有关,一个电子每次从,最低的能级开始,然后以我们的方式上升到,更高更高的轨道。
I mean, you'll play with it in great-- with great delight this semester, you will see that backslash N is the standard in any text file for creating what we know as new line characters.
我是指,这学期,你们会很高兴-,和它打交道,同时你们也会看到,在任何文本文件里,反斜杠n已经是,换行的代名词了。
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