Chapter 3 improves the calculating method of VAR model. It introduces importantly the random searching delta-normal method and the improvement the Monte Carlo simulation method.

第三章对VAR模型的计算方法进行了改进，重点介绍了随机搜索化的德尔塔正态方法和蒙特卡罗模拟法的改进；

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There are three deltaic types developed in lacustrine strata, i. e. , normal, braid and fan deltas, which consist of delta plain, delta front and front delta.

在湖泊中存在三种三角洲类型，即正常三角洲，辫状三角洲和扇三角洲。

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