重点解决在没有轨道观测数据的情况下，如何利用再入飞行中的测量数据进行状态和参数估值。数据包括体轴角速率和过载，由固连于飞行体的速率陀螺和加速计给出。

The emphasis is put on estimating the states and parameters only on the basis of the re-entry on-board measurement data in the absence of trajectory observation data.

youdao

So, it turns out that we have zero nodes that we're dealing with when we're talking about a 3 d orbital.

所以结果是,３ｄ轨道没有节点。

麻省理工公开课 - 化学原理课程节选

It might not have any electrons in it, but it still exists, so you need to draw these into your molecular orbital diagram.

也许它里面没有电子，但它是存在的，所以你需要在分子轨道图里画出来。

麻省理工公开课 - 化学原理课程节选

All right. So, today we're going to be talking about molecular orbital theory, but first I wanted to just mention, in case some of you didn't hear what the Nobel Prize was this morning, and this was in chemistry, it went to three different chemists.

好的，今天我们要讲的是,分子轨道理论，但首先我要说，以免有些同学没有听到,今天早上的诺贝尔奖，这是化学奖，它颁给了3个不同的化学家。

麻省理工公开课 - 化学原理课程节选