1.Suppose that a data warehouse consists of four dimensions, date, spectator, location, and game, and two measures, count and charge, where charge is the fare that a spectator pays when watching a game on a given date. Spectators may be students, adults, or seniors, with each category having its own charge rate. (a)Draw a star schema diagram for the data warehouse. (b) Starting with the base cuboid [date, spectator, location, game]，what specific OLAP operations should one perform in order to list the total charge paid by student spectators in Los Angeles? (c) Bitmap indexing is a very useful optimization technique. Please present the pros and cons of using bitmap indexing in this given data warehouse.

系统辨识课课后作业的代码，最小二乘法辨识，包括运行结果。

中科院数据挖掘刘莹第一次作业

天津大学非线性ode及在工程中的应用第一次作业源代码，应随课堂作业使用，包含作业中制作隐函数图像，画微分方程方向场以及求解线性齐次方程组