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旅美趣闻-卖树给人钱
陈俊东 2010-2-21 14:43
今天,帮着Ms.D做了些花园的活。突然问起,花园里的一棵大松树有多大年纪了, 她说,一百吧,或者七八十。 然后她马上说,准备砍掉,因为树长得太大,并且有了两个大分叉,很危险,容易裂开来。我一看,果然,这棵树就跟字母Y一样。 然后,她说,找人砍需要3000美金。 我说这么贵,那么把树卖掉能有多少钱。 ...
个人分类: 未分类|3726 次阅读|没有评论
windows 7 (64-bit)中图片转为latex 指定的EPS
热度 2 陈俊东 2010-2-21 14:30
近日来写了一篇学术文章。导师推荐用latex来写,因为用word写出来的显得太幼稚,并且灵活性不够,因为用latex编好的文章,不论投到哪个杂志,只要把相应的杂志所需要的模板添加上就可以满足相应的版面要求。 但是,再用latex的过程当中遇到了一个问题,因为我用的Winedt,所以只能用 eps格式的图片,所以需要转化。可能还会 ...
个人分类: 未分类|10746 次阅读|5 个评论 热度 2
太极拳名词---揽雀尾
陈俊东 2009-8-28 14:32
揽雀尾的雀尾,指的是孔雀的尾巴,用来比喻许多长矛。
个人分类: 未分类|3946 次阅读|1 个评论
Finite Difference Method
陈俊东 2009-8-15 04:57
Dr. Dai let us use different methods to solve the same question. Jacobi, Gauss-Seidel, and SOR iteration. From this example we can see the powerthattechnology brings. Jacobi 21897 iterations GS 11651 iterations SOR &nbs ...
个人分类: 未分类|4325 次阅读|没有评论
Finite Difference Method-LW
陈俊东 2009-8-15 04:47
This is about Lax-Wendroff Scheme. The HW#12 assigned by Dr.Dai is the simulation Shock Wave. The picture shown below. You will find that along as time going, the wave form keep moving. Lax-Wendroff Scheme
个人分类: 未分类|3527 次阅读|没有评论
Finite Difference Method-CN Scheme
陈俊东 2009-8-15 03:36
(Continued with last blog) Last blog is about explicit scheme. Here using Crank-Nichlson Scheme. Like last blog I just post some result picture here. And some appendix in attachment is helpful to understand this. I write someequationsfor explanationin the word file. &n ...
个人分类: 未分类|3648 次阅读|没有评论
Finite Difference Method-Explicit Scheme
陈俊东 2009-8-15 03:17
Today, MATH 575 is finished. We had our final exam this morning. Problem 4 is about truncation error. It is difficult. Time is not enough to finish that problem. The others are OK. In this blog, I want to record something I have learned. Just for review. In case, in the future I will forget. Bec ...
个人分类: 未分类|4411 次阅读|没有评论
Finite Difference Method-ADI Scheme
陈俊东 2009-7-26 01:16
This is HW#8 assigned by Dr.Dai in MATH 575. This course is about Finite Difference Method. Teach us this Method here is mainly for solving Partial Differential Equation. HW#8 using ADI method to solve a problem ina square area. I post the result picture here. And also provide some app ...
个人分类: 未分类|5484 次阅读|没有评论
有限元分析——课程设计
陈俊东 2009-7-26 01:05
这是需要求解区域,这是一个L形状的区域。边界上都为零。 求解各个点的值。并绘制图形。 我用matlab进行了实现。 结果如下: 具体方法还是如上篇博文中的分解组装有限元方法。 现在,虽然说有限元方法在技术上已经非常成熟,并且涌现出了很多这方面的专业软件。但是这些软件,只能保证能够应用。但是,至于有限元方 ...
个人分类: 未分类|6337 次阅读|没有评论

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