-
An open system, as the name describes, allows mass and energy to freely flow through the boundary.
开系，顾名思义，允许质量和能量自由地,流过它的边界。
-
All right. Then we're going to set low to-- low and high, and we're going to perform exactly the process I talked about.
不满足条件,我们就可以直接停止运行了，好，接下来我们要定义边界值,然后按照我之前。
-
As soon as I detect with what we'll call a condition if I'm touching the edge I have to essentially spin around 180 degrees and then continue looping.
一旦我检测到这种情况,当我碰到边界时,我需要转180°然后继续这一循环过程。
-
.. I computed the efficient portfolio frontier for various-- it's the efficient portfolio frontier using the formula I just gave you.
我计算了来自不同组合有效边界-,这一条有效投资组合边界,就是用刚刚给出的公式算出来的。
-
He has this whole group of people out somewhere on the American frontier and they're a kind of a cult.
他描写了来自于美国边界某处的一群人,他们是一群狂热分子
-
So, there is that kind of a boundary as well, and that is a place where trouble is likely to emerge.
因此,也有那种边界,而边境线上恰恰是最容易发生争端的地方
-
There were always battles and wars going on, on the boundaries, the frontiers of the Roman Empire, but within the center of the empire there was an amazing period of peace.
战争永远都在进行，在边界，罗马帝国边境，但在帝国中心却是一派和平盛世。
-
Mass and energy flow through boundary.
质量和能量流过边界“
-
That the borders of our minds are shifting, and that our memories are part of one great memory, the memory of Nature herself.
实际上这是指我们的想象力],我们心灵的边界一直变化，我们的记忆是一个伟大的，自然的记忆的一部分。
-
Milton's performing a similar boundary-crossing aesthetic gesture here.
弥尔顿在他的作品中也展现了这种美学上的边界交叉。
-
The plane crashes exactly on the border of Canada and the United States.
飞机刚好,在加拿大和美国的边界上坠毁
-
I think that these countries are somewhat trying to manage this oil risk but they can't yet get onto the frontier.
我想这些国家或多或少,都试着控制石油风险,但他们根本无法达到有效边界。
-
What I did in this diagram is I computed the efficient portfolio frontier-- now it's the blue line with three assets.
在这张图表中,我计算了有效边界-,蓝色线表示三种资产的组合。
-
What I have up there on the diagram are calculations I made for the efficient portfolio frontier with three assets.
上面的图形是我已经算好的,三种资产的有效投资组合边界。
-
system is the opposite of the open system, no mass and no energy can flow through the boundary.
孤立系与开系正相反，没有质量或能量,能流过它的边界。
-
It doesn't have to be a real container to contain it It's just an imaginary boundary there.
它不必是,一个真实的容器,只是一个想象的边界。
-
There is surrounding farmland going as far,typically, as there is either a natural or an artificial frontier.
周围环绕着农田,这些农田一般会延伸至一个自然边界,或者一个人工边界为止
-
Doesn't need to be, so, what should I do about the upper bound here?
不必改下边界值，因此,我该对上边界值做个怎么样的改动呢？
-
Remember, I said when we do a bisection method, we're assuming the answer lies somewhere between Well, what is the square root of a quarter? It is a half.
记住，我提过当我们用二分法的时候,我们假设答案处于,上边界和下边界之间,0。25的平方根是多少？,是0。5。
-
The boundary is impervious to transfer of heat like a thermos Anything that happens inside of the thermos is an adiabatic change because the thermos has no connection in terms of energy to the outside world.
边界不能传递热量,像热水瓶一样,热水瓶里发生的任何事,都是绝热变化,因为热水瓶与外部世界,没有能量方面的联系。
-
for instance, for the thermos with the coffee in if you place the boundary in the inside wall of the glass or the outside wall of the glass and the inside of the thermos, that makes a difference; different heat capacity, etcetera.
比如说，对于装咖啡的热水瓶来说,你把边界设置在瓶胆的内壁上,或者设置在瓶胆外壁上,或设在热水瓶里面，情况都是不一样的;,有不同的热容等等。
-
And where you place that boundary becomes important.
而在何处设置边界,就变得很重要。
-
He estimates, for his purposes, and he shows you calculations of the efficient portfolio frontier.
他用自己的角度估算了参数,他还给出了计算有效边界的方法。
-
That's what we have to know to compute the efficient portfolio frontier with three assets.
这些都是计算三种资产的有效边界,所需要用到的。
-
Some of those countries are really reliant on oil, ... so they really have to do-- they really should do a calculation of efficient portfolio frontiers.
有些国家过于依赖石油了，所以他们真的需要-,他们真的应该好好算一算,有效边界。
-
And 72 hours by train he found himself on a huge cotton plantation, near Pickensville, Alabama, on the in west central Alabama, on the Mississippi border, at 14-years-old.
在搭乘了七十二小时的火车后,他发现自己身处亚拉巴马的皮肯斯维尔附近,一个巨大的棉花种植园中,在亚拉巴马西部的中心,密西西比的边界,那年他仅仅十四岁
-
That's a sign to me that we're not there yet and we have a lot more to do in finance.
很明显，我们并没达到那个边界,这说明我们在金融领域还有很多事情要做。
-
The pink line here is the efficient portfolio frontier when we have only stocks and bonds to invest.
这条粉色曲线就是有效边界,这个投资组合只包括了股票和债券。
-
Once you've got them together, then you can compute the efficient portfolio frontier without the riskless asset.
当你明确了这些参数后，就可以算出没有无风险资产情况下的,有效边界了。
-
So this becomes where defining the system and the boundaries and everything becomes important.
因此问题就变成了,如何定义系统和边界,那么一切都变得重要了。
应用推荐