读(购买基于R语言读数学建模赠书)施蒂格勒自传-一个自由主义经济学家的自白

你想了解经济学研究的是什么吗?不想。你想了解经济学背后的点点滴滴吗,想。用一本书的时间看到近代经济学家所做出的努力怎么样?那会不会晦涩难懂呢?或者冗长不已,需要用一本《国富论》的时间?不用,只是浅尝辄止。

中国人很喜欢哈耶克,知道芝加哥学派,却很少有人知道施蒂格勒。也许是名字生涩,但我觉得两者身份相近且施蒂格勒还要成功一点,我敢说。两人差20岁,却在相同的大学任过教,且逝世年份相近。学派却不一。但哈耶克的观点似有似无的影响着他。

二战战败国的后裔,年龄差了一点,但总算是继承了德国民族的学习能力。自由一名实属不易,自由主义经济是经济的衍生,或者说在亚达斯密那个年代就已然出现,政府尽量不干预经济的自由生长,现在被证明有些许问题,但在当时的欧洲美国是非常盛行的一种观念,因为这符合美国人的利益。欧洲人也会对此欣然,因为他们的理论被证明有效。可是哈耶克在《通往奴役之路》说:"民主在自由之中寻求平等,而社会主义则在约束和奴役之中寻求平等。"这就是和施蒂格勒不一样的地方,哈耶克是在看破二战阴霾后才出此言,同时他的平视社会主义和唱衰资本主义大概就是中国人青睐他的原因吧。

书中的案例颇多,大概就是自己年轻的时候犯过的错,做过的贡献,自己超越时代的思想,说什么主张,还不就是学生多了,听众多了。

记忆颇深的就是他提及的象牙塔和社会所需人才的区别。在象牙塔里,你不需要懂的多,只要有成果,就会对你有人文关怀,然而社会是磨平棱角的锉刀。

那么针对今天的反全球化有什么新的理论呢?

some thoughts collected from TOMMORROW 2015

Showing solutions, telling a feel-good story… this may be the best way to solve the ecological, economical and social crises that our countries are going through. After a special briefing for the journal Nature announced the possible extinction of a part of mankind before the end of the 21st century, Cyril Dion and Mélanie Laurent, together with a team of four people, carried out an investigation in ten different countries to figure out what may lead to this disaster and above all how to avoid it.

During their journey, they met the pioneers who are re-inventing agriculture, energy, economy, democracy and education. Joining those concrete and positive actions which are already working, they began to figure out what could be tomorrow's world…

You will find below some of the characters and contributors met by the DEMAIN team during its journey in 10 countries. Among those not mentioned are :

the Detroit urban farming movement ; Incredible Edible in Todmorden (GB) ; Copenhagen citizens and representatives ; Eric Scotto, Akuo Energie CEO ; Guðni Jóhannesson, general manager of the Icelandic National Energy Authority; the Bristol Pound team ; Hervé Dubois, spokesman of the WIR bank in Basel ; Michael Schuman, economist, ;members of BALLE ( Business Alliance fot Local Living Economies); people  of the Kitchenware Revolution in Iceland…

THE CHARACTERS

  • ANTHONY BARNOSKY
  • EMMANUEL DRUON
  • JAN GEHL
  • ELIZABETH HADLY
  • CHARLES ET PERRINE HERVÉ-GRUYER
  • ROB HOPKINS
  • BERNARD LIETAER
  • MICHELLE LONG
  • KARI LOUHIVUORI
  • PIERRE RABHI
  • ELANGO RANGASWAMY
  • ROBERT REED
  • JEREMY RIFKIN
  • THIERRY SALOMON
  • OLIVIER DE SCHUTTER
  • VANDANA SHIVA
  • DAVID VAN REYBROUCK
  • MALIK YAKINI

THE TEAM

Mélanie Laurent - Film director

Actress since the age of 14th, Mélanie Laurent has participated in more than 40 feature films, among which Quentin Tarantino's Inglorious Bastards, Philippe Lioret's Je vais bien ne t'en fais pas (for which she was awarded a César (the French Oscar) for best young actress), Radu Mihaileanu's Le Concert, Roselyn Bosch's La Rafle, Billie August's Night Train To Lisbon, Mike Mills's Beginners.

She shot four movies, two short films and two full-length feature films. Her second, Respire, adapted from the novel by Anne-Sophie Brasme was featured on october 2014 and presented at the Semaine de la Critique at the Cannes film festival 2014. She is currently preparing Plonger adapted from the novel by Christophe Ono-dit-bio. 

Cyril Dion - Author and film director

After a very short carrier as an actor, Cyril became Project Manager for the Hommes de Paroles foundation. He took part in organising the Israeli-Palestinian congress in Caux in 2003, then the 1st and 2nd Imams and Rabis World Congress in Bruxelles and Sevilla in 2005 and 2006.

In 2007, with Pierre Rabhi and some friends, he founded the Colibris movement which he ran until July 2013. Up to this day, he is still its spokesman and a member of the board council. Meanwhile, he is co-founder of the Kaizen magazine and the Domaine du Possible series for Actes Sud (a French publisher). In 2010, he was a producer executive with Colibris for Solutions locales pour un désordre global (“Local solutions for a global disorder”) by Colline Serreau. In 2014, he published a book of poems Assis sur le fil (“Seated on the Wire”) at la Table Ronde.


Good TOEFL score PATH

First of all, the previous notes really help.

My struggling for TOEFL

Secondly, what materials should I cover?

The first is bilibili 110 tackle down, TOEFL green handbook, orange handbook, TPO*5, writing 10, oral *5

Last but not least, add a group.

My question on my gpa last semester

Dear Daniel:

   As a student, I show great respect for teacher’s grading and don’t want to change anything but just ask for a word.

   Last semester, in total, I quit 2 class and sleep once and 4 times 5 mins late and never summitted the homework late.

   The first day this semester, I’ve asked some of my classmates. The first is the one who took oral test with me, he got 3.3. I obviously performed better than him in the oral test, and after we checked the answer of the final exam, we shared quite similar answers. So we may not have great difference in the test scores. So the only distance occurred in my attendance. But as far as I know, attendance only occupy 20% of the study. In another case, another person who shared the same experience with me, which means that he also had 1 time off class and he got 3.7.

   I don’t mean something else, I know my strength in English, and I know my attitude may hurt you. Actually, it’s an ideology shock caused by cultural difference. I don’t put punctuation as top priority. I know, every teacher favors students with good attitudes. But I may point out that those attitudes may be pseudo-good attitude. I’ve got bored of seeing people pretend to listen to you and playing games on their screen, and even the top girls had done while I was sleepy cuz my lack of sleep to tackle the study burden. I think I get this low score is just because my "outstanding" figures in your eyes.

   Actually, this semester, I can apply the “no need to study “ policy because my TOEFL score has reached 95. But I didn’t do that, because I’m still seeking the better score, and in search of a method to practice my speaking and writing. (P.S. I didn’t realize that the teacher is still you) So let’s get rid of the preconceived  ideas and witness my progress.

   yours, sincerely.

   Victor Yang

韩国旅游游记

从山城首尔到海滨釜山,用脚步去感受他的文化艺术与风情。

但从一个人暴走的感觉来看,虽说韩国人还是比较友好的,但我还是无奈的被坑了好多钱。老一辈的人对中国日本都还有偏见。听在釜山的一个阔佬说:“对中国友好程度在萨德以前是一半一半,现在呢是1/3,2/3。”估计新冠以后就无了。韩国人被中国人和日本人欺负还能保持这种虚假的民族性(军队美国/文化日本/赚钱中国),其实还是很厉害的。

这无疑导致我对韩国的印象很差。很差。虽然是发达国家,有很多发达国家的要素,但真的不想去第二次,不想在韩国花一分钱,感觉这里是非常专制(连route都不给)、民众极其愚昧、素质也不高,可远观而不可亵玩焉。

Continue reading "韩国旅游游记"

数学建模导论

时间性、随机性、优化性三个变量能很好的对应八卦限图。

数学建模应当掌握的十类算法
‍‍ 1、蒙特卡罗算法(该算法又称随机性模拟算法,是通过计算机仿真来解决问题的算 法,同时可以通过模拟可以来检验自己模型的正确性,是比赛时必用的方法)

2、数据拟合、参数估计、插值等数据处理算法(比赛中通常会遇到大量的数据需要 处理,而处理数据的关键就在于这些算法,通常使用Matlab作为工具)

3、线性规划、整数规划、多元规划、二次规划等规划类问题(建模竞赛大多数问题 属于最优化问题,很多时候这些问题可以用数学规划算法来描述,通常使用Lindo、 Lingo软件实现)

4、图论算法(这类算法可以分为很多种,包括最短路、网络流、二分图等算法,涉 及到图论的问题可以用这些方法解决,需要认真准备)

5、动态规划、回溯搜索、分治算法、分支定界等计算机算法(这些算法是算法设计 中比较常用的方法,很多场合可以用到竞赛中)

6、最优化理论的三大非经典算法:模拟退火法、神经网络、遗传算法(这些问题是 用来解决一些较困难的最优化问题的算法,对于有些问题非常有帮助,但是算法的实 现比较困难,需慎重使用)

7、网格算法和穷举法(网格算法和穷举法都是暴力搜索最优点的算法,在很多竞赛 题中有应用,当重点讨论模型本身而轻视算法的时候,可以使用这种暴力方案,最好 使用一些高级语言作为编程工具)

8、一些连续离散化方法(很多问题都是实际来的,数据可以是连续的,而计算机只 认的是离散的数据,因此将其离散化后进行差分代替微分、求和代替积分等思想是非 常重要的)

9、数值分析算法(如果在比赛中采用高级语言进行编程的话,那一些数值分析中常 用的算法比如方程组求解、矩阵运算、函数积分等算法就需要额外编写库函数进行调 用)

10、图象处理算法(赛题中有一类问题与图形有关,即使与图形无关,论文中也应该 要不乏图片的,这些图形如何展示以及如何处理就是需要解决的问题,通常使用Matlab 进行处理)

以上八大卦限分别对应10个命题