Envelope Theorem

一开始晓得Envelope Theorem是在一本微观经济学的书上: 长期成本函数是许多短期成本函数的包络线. 这学期选了MATLAB程序设计这门课程, 期末作业老师出了相关的题目. 说实话选这门课完全是为了混学分, 这学期一共只去上了3次课. 现在终于等到布置期末作业, 实际上就是去计算列车车轮的踏面轮廓线, 交大最有力的研究估计有一半来自车轮踏面上的方寸之地. 为了弥补常常缺席, 不交平时作业的可能带来的损失, 我决心把期末作业搞得好看些, 让老师有理由多给我几分. 自以为这篇作业报告写得不错, 还发现了原题中的一个错误, 有兴趣你可以下载来看喔. Update: 图像看起来也不错呀:

Posted by W.L.X. Fri, 19 Dec 2008 20:06:00 +0800


Crazy Sudoku

I participated in Mathematical Contest in Modeling (MCM) in the past few days. We chose problem B: Creating Sudoku Puzzles, a difficult task for me and my teammates. We worked hard together — lots of coding and writing. The following are the problem and the abstract of our paper. [...]

Posted by W.L.X. Wed, 20 Feb 2008 08:30:00 +0800