12.1 The Nature of Autocorrelation 1. Definition (1) CLRM assumption: No autocorrelation exist in dishurbances ui; E(iμi)=0 Autocorrelation means: E(μiμ)≠0 (2) Autocorrelation is usually associated with time series data, but it can also occur in cross-sectional data, which is called spatial correlation
语言仅仅是一种编码的想法似乎很容易被人们接受，很多人在学生时代至少学过一种外语， 因此，我们知道在英语中“c a t”（猫）也可以被叫作g a t o、c h a t、K a t z e、K O I I I K或k a p a。 然而，数字不那么容易随文化的不同而改变。不论那种语言，也不管怎样读那些数字， 地球上我们能够遇到的几乎所有的人都用同样的方式来写数字：
I, Aims and Requirements 1 To review the classification of sentences 2 To let the ss know the location combination and the choice of relative pronouns and adverbs 3, To remember some typical sentences and learn by analo I、 Key points: The choice of relative pronouns and relative adverbs I、 Difficult points:
