We will take the English final test this morning.The teacher assigned each team a topic,our team's topic is "how to educate a child?".well,that's a good question.Here I want express my own opinoin on this topic. First of all,the importance of education can not be too much emphasized.Because it is closely connected with the future of our nation. Education help us to developourscience and technology， education improvethe people's quality ,and it's the education help us lead a better life.In my piont of view,children's education plays the most important role in a man's life.To educate a child well，parents are their children's best teachers.because of this,in the family，the parents should create a good atmosphere ，they must set a good example to their children. Secondly，the children's chioce should be amply respected.parents must give their children enough personal space and freedom,which is very important in the westen education.while in china，it has always been overlooked . Finally,a famousphilosopher once said:"edcation is the power of awakening consciousness",I couldn't agree more! The children themselves should form a good habit,it has a close relationship with the family 、 school and society.Here I want to say,education is not only the parents' responsibility,but the every member of our nation!
When I read this bolg this morning ( http://blog.sciencenet.cn/home.php?mod=spaceuid=569569do=blogid=448000 ) It suddenly downed on me that why couldn't I write the blog in English！ I have always been learning English very hard，I passed the college English Bet 4 test when I was a fresh man ,and then got through the Bet 6 test in the following year.Since I became a postgraduate ，because my subject is logistics engineering ，I found that English is more important for me.So I begun to learn English harder then ever before.I am mad about English now. IreadEnglish loudly in the morning ,andlisten the BBC or VOA materialstored in mymp3 player beforegoing to sleep.In a word,I have pieced together all my spare time to learn English well. Now,in the following passage,I'll introduce my learning method: Fisrtly,I have been reciting the new concept English 3 last year .Though I had learnt the textbook when I was a undergraduate .However,I have almost forgot all of the passages I acquinted.Through persistent hard work，I can recite 40 passages very fluently now,and I hope Secondly，To improve my listening ，Ilistenend theVOA special English at first .After that,I begun to listen VOA standard and BBC.Though it's very hard to appreciate all the contents of the liatening material,you can listen it over an over again until you get the every meaaring of the sentence,even the every meaning of the word.As the old saying goes:practice makes perfect.Only through persistent effort can we improve our English. Finally,I want to say the most important thing in learning English.To learn English,you must make it become part of your life,you muststudy English with full of passion,and you must study English with great interest.There is no shortcut on the road to learn English.Here I want to cite the chinese old saying as a conclusion :Diligence is the path to the mountain of knowledge，hard-working is the boat to the endless sea of learning.(书山有路勤为径，学海无涯苦作舟)
最近，在拟合一些样本概率分布时候，用对数正态分布对整个样本拟合还不错，但是尾分布用幂律分布拟合也不错。正纠结于选择什么分布比较合适的时候？我发现Sornette教授提出了一个有效的方法 来判断究竟尾分布究竟是对数正态，还是幂律？ 想法源于1999年Journal of the American Statistical Association上一篇关于指数和正态分布检验的论文。因为将服从幂律分布或对数正态分布的随机变量取自然对数之后，即转化为服从指数或正态分布的变量。因此，通过对样本参数的简单变换，就可以将目标问题转化为样本变量服从 指数分布， 还是服从 正态分布 的问题 （个人认为很巧妙！）。 如何计算分布参数？如何进行统计检验？具体就不做介绍了，请重点看文献 第三节的第二小节。 Y. Malevergne, V. Pisarenko, D. Sornette, Physical Review E 83 , 036111 (2011). J. D. Castillo, P. Puig, Journal of the American Statistical Association 94 529-532 (1999).
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