生而为赢

——摘自《新东方-生而为赢》

人皆生而为新,为前所未有之存在;人皆生而能赢。人皆有其特立独行之方式去审视、聆听、触摸品味及思考,因而都具备独特潜质——能力和局限。人皆能举足轻重,思虑明达,洞察秋毫,富有创意,成就功业。

“成者”与“败者”含义颇多。淡及成者,我们并非指令他人失意之人。对我们而言,成者必为人守信,值得信赖,有求必应,态度诚恳,或为个人,或为社会一员皆能以真诚回应他人。

成者行事并不拘泥于某种信条,即便是他们认为应为其奉献一生的理念;而是本色行事,所以并不把精力用来表演,保持伪装或操控他人。他们明了爱与装爱,愚蠢与装傻,博学与卖弄之间迥然有别。成者无须藏于面具之后。

成者敢于利用所学,独立思考,区分事实与观点,且并不佯装通晓所有答案。他们倾听、权衡他人意见,但能得出自己的结论。尽管他们尊重、敬佩他人,但并不为他所局限、所推翻、所束缚,也不对他人敬若神灵。

成者既不佯装“无助”,亦不抱怨他人。相反,他们对人生总能独担责任,也不以权威姿态凌驾于他人之上。他们主宰自己,而且能意识到这点。

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球协函数图像的绘制

本文利用 Python 编程语言实现归一化球协函数图像的数据准备,并用 Mathematica 绘制图像。

归一化球协函数为:

 Y_{lm}(\theta,\phi)=\sqrt{\frac{2l+1}{4\pi}\frac{(l-m)!}{(l+m)!}}P_l^m(\cos(\theta))e^{im\phi}

其中 l=0,1,2,\cdots,m=0,\pm 1,\pm 2, \cdots, \pm l,\quad P_l^m(\cos \theta) 为连带勒让德函数

m>0 时,把 m 递归到零:

\sqrt{1-x^2}P_l^m(x)=\frac{1}{2l+1}[(l-m+1)(l-m+2)P_{l+1}^{m-1}(x)-(l+m-1)(l+m)P_{l-1}^{m-1}(x)]

m<0 时,把 m 递归的零:

\sqrt{1-x^2}P_l^m(x)=\frac{1}{2l+1}[P_{l-1}^{m+1}(x)-P_{l+1}^{m+1}(x)]

m=0 时,把 l 递归到零:

(l-m)P_l^m(x)=(2l-1)xP_{l-1}^m(x)-(l+m-1)P_{l-2}^m(x)

利用以上三式就可以通过递归程序定义连带勒让德函数。

下面是 Python 程序代码

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Mathematica 相关 — 鲁大科协

1、Mathematica 历史和背景
http://www.wolfram.com/company/mathematica-history.html
http://www.wolfram.com/mathematica/quick-revision-history.html

2、Mathematica 下载、安装与破解方法,学习及使用
http://subs.zhli.net/mathematica-download/

3、Mathematica 语言介绍

下载:
pdfMathematica 语言介绍.pdf [201.09 kB] -

4、利用Mathematica编制光斑位移自动化测量程序

下载:
CDF版: cdf利用Mathematica编制光斑位移自动化测量程序.cdf [942.18 kB] - 需要用 Mathematica 打开
PDF版: pdf利用Mathematica编制光斑位移自动化测量程序.pdf [1.16 MB] - -

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Emacs for Windows

下载地址:
http://ftp.gnu.org/gnu/emacs/windows

简单配置:

;;My Options
(setq inhibit-startup-message t)
(global-linum-mode t)
(column-number-mode t)
(setq scroll-margin 3
      scroll-conservatively 10000)
(setq default-major-mode 'text-mode)
(mouse-avoidance-mode 'animate)
(setq frame-title-format "emacs@%b")
(auto-image-file-mode)
(setq make-backup-files nil)
(setq delete-auto-save-files t)


(tool-bar-mode 0)
;(menu-bar-mode 0)
;(scroll-bar-mode 0)


(global-set-key (kbd "RET") 'newline-and-indent)


(setq c-default-style "stroustrup")
(setq c++-default-style "stroustrup")

(setq indent-tabs-mode nil)
(setq default-tab-width 4)
(setq tab-width 4)
(setq tab-stop-list ())
(setq tab-stop-list '(4 8 12 16 20 24 28 32 36 40
                    44 48 52 56 60 64 68 72 76 80 84 88 92 96))

(display-time-mode 1)                
(setq display-time-24hr-format t)
(setq display-time-day-and-date t)

Steve Jobs 在2005年斯坦福大学毕业典礼的演讲

"Stay Hungry, Stay Foolish." 求知若饥,虚心若愚

2 June 2005, Palo Alto, CA

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Thank you.

I'm honored to be with you today for your commencement from one of the finest universities in the world. Truth be told, I never graduated from college, and this is the closest I've ever gotten to a college graduation. Today, I want to tell you three stories from my life. That's it. No big deal. Just three stories.

The first story is about connecting the dots. I dropped out of Reed College after the first six months, but then stayed around as a drop-in for another 18 months or so before I really quit. So why did I drop out?

It started before I was born. My biological mother was a young, unwed graduate student, and she decided to put me up for adoption. She felt very strongly that I should be adopted by college graduates, so everything was all set for me to be adopted at birth by a lawyer and his wife -- except that when I popped out they decided at the last minute that they really wanted a girl.

So my parents, who were on a waiting list, got a call in the middle of the night asking, "We've got an unexpected baby boy; do you want him?" They said, "Of course." My biological mother found out later that my mother had never graduated from college and that my father had never graduated from high school. She refused to sign the final adoption papers. She only relented a few months later when my parents promised that I would go to college. This was the start in my life.

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