我们称这种变数为密度微分。
这种毡制品只是为了消除与塑料产生太多的摩擦力，或者让它与外壳稍微分开。
This felt thing there is just to avoid too much friction from building up with the plastic or to keep it slightly separated from the case.
这种毡制品只是为了消除与塑料产生太多的摩擦力，或者让它与外壳稍微分开。
This felt thing there is just to avoid too much friction from building up with the plastic or to keep it slightly separated from the case.
我们已经写出了一个微分方程。
这无关紧要，我们用微分是怎样做的？
It doesn't really matter. So, how do we do things using differentials?
你们有些人也许已经，解出了微分方程。
这是一个非常，简单的微分方程，两边积分。
Namely, this is still a pretty straightforward differential equation. So let's just integrate both sides.
来看一下这个约束量的微分。
Well, let's look at the differential — — of this constraint quantity.
我们可以用微分，就像这样，也可以用链式法则。
Well, we could use differentials, like we did here, but we can also keep using the chain rule.
这是整个机理的完整的微分方程，不是它的一部分。
This is the full differential equation for the full mechanism. Not just one part of it.
几个微分方程。
请注意这里的小横杠，说明这不是一个准确的微分。
And this little slash here means an in inexact differential.
这个就是微分。
要完全了解本课程，应必备微积分和微分方程的知识。
Calculus and Differential Equations are highly recommended for full understanding of the course.
戴夫：稍微分点心或许对你有好处，吉娜。
它们唯一共同之处就是,它们都被叫作一阶微分算子。
The only thing they have in common is that both are what's called a first order differential operator.
有限的微分区——t1上4个，t2上8个。
Limited micro-partitioning - Four partitions on T1, 8 on t2.
我们要解决，两个成对的微分方程，这是无法解决的任务。
And so now we have to solve two coupled differential equations, which is a hopeless task.
好的我们可以看这儿,看这个微分方程，这里没有做近似。
Well we can go look up here, looking at the differential, there are no approximations here.
微分区和虚拟化。
这就是“什么是微分？这个式子是什么？”，最普遍的回答。
I would say that is the most general answer to what is this formula, what are these differentials.
我们给LPAR分配全内核值和微分区的半内核值。
We assigned whole-core values as well as micro-partitioned half-core value to the LPAR.
看来大部分人喜欢微分法，但这不是说微分法就更好。
OK. Majority vote seems to be for differentials, but it doesn't mean that it is better.
所以这两者也相等,这告诉我们在恒压下微分，等于。
So, these two are equal to each other as well which tells me that this derivative, Cp dH/dT constant pressure is Cp.
我们还学过微分的链式法则，也就是用其他量来代替这些偏导数。
So, we've learned about differentials and chain rules, which are a way of repackaging these partial derivatives.
这个是符号化的向量算子，其中它的分量是偏微分算子。
That was this symbolic vector operator in which the components are the partial derivative operators.
其他的感应装置是基于微分迁移率分析方法和红外探测。
The other sensors will be based on ‘differential mobility analysis’ and infrared detection.
再说明一下，这是关于这两个向量场，多少有点奇怪的偏微分方程。
And just to tell you again that is a strange partial differential equation relating these two vector fields.
那么对于dA，我们必须谨慎地使用乘法法则，或用偏微分。
Well, then, dA, so we had to use the product rule carefully, or we use the partials.
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