x****6 发帖数: 4339 | 1 不是 automation, 而是automaton。
Cellular automaton按照我的理解,是一种由很多基本单元组成的动态系统,单元和单
元之间是交互的,这种交互往往遵循简单的规则,而这些局部的交互往往能够造成系统
整体的emergent property。
比如下面这个图: |
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x****6 发帖数: 4339 | 3 ising模型可以理解为cellular automaton的最简形式。
我记得1维ising模型是有解析解的,二维好像没有,三维肯定没有。
anyway,
cellular automaton的交互规则比ising模型要复杂一些,如果需要赋予生物学意义的
话。
比如,如果focal cell周围相邻的八个cell里,有五个或以上是被生物占据,那么
focal cell就是空的;反之,则有一个生物。等等。 |
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C****o 发帖数: 1549 | 4 二维有解析解 有相变
一维没有相变
你可以建立个类似的数学模型从一维开始研究
: ising模型可以理解为cellular automaton的最简形式。
: 我记得1维ising模型是有解析解的,二维好像没有,三维肯定没有。
: anyway,
: cellular automaton的交互规则比ising模型要复杂一些,如果需要赋予生物学
意义的
: 话。
: 比如,如果focal cell周围相邻的八个cell里,有五个或以上是被生物占据,那么
: focal cell就是空的;反之,则有一个生物。等等。
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A*******s 发帖数: 8645 | 5 http://www.latestchess.com/showArticle.php?id=14
Up until the 20th century, there were only a handful of factors that
propelled chess kicking and screaming into the mainstream and popularized it
with the general population. Philidor's blindfold exhibitions and, to a
lesser degree, von Kempelen's automaton gave people something to watch in
the 18th century, while Maezel's reincarnation of the automaton as the Turk
played an extremely important role in chess in the early 19th century,
especially i |
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c****t 发帖数: 19049 | 6 THE GHASTLY ORDEAL OF TIMOTHY CAVENDISH
One bright dusk, four, five, no, my God, six summers ago, I strolled along a
Greenwich
avenue of mature chestnuts and mock oranges in a state of grace. Those
Regency residences
number among London’s costliest properties, but should you ever inherit one
, dear Reader, sell
it, don’t live in it. Houses like these secrete some dark sorcery that
transforms their owners into
fruitcakes. One such victim, an ex-chief of Rhodesian police, had, on the
evening in qu... 阅读全帖 |
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l***t 发帖数: 81 | 7 Regular expression is equal to automaton.
flex can generate code for the automaton. |
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s*****t 发帖数: 89 | 8 从来没听说过所谓的automaton machine...
你是不是想说automaton/finite-state machine啊? |
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d*****u 发帖数: 17243 | 9 这让我想起了当今认知科学(cognitive science)内的连接主义和计算主义之争
connectionism vs. computationalism
从上世纪70年代以来,行为主义遭到批判而退出主流
在心理学、语言学、人工智能等领域都盛行计算主义
也就是用基于符号的运算,包括逻辑运算来模拟人的思维活动
Chomksy提出了competence和performance之别
他说人有内化的语言能力,是基于符号和运算的,所以有各种句法、词法、音系法则
而语言的应用则是performance,是通过神经系统来实现这些法则和运算
基本上人的语言系统就跟automaton一样
这些年连接主义又开始抬头
它否定割裂算法和目标,认为神经网络是模拟思维的最佳方式
这种模型依靠输入和输出来train预先设定的系统
当输入输出能与观察相符,就认为模拟出了认知过程
从更大的背景看,这是理性主义和实证主义的又一次碰撞 |
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b********n 发帖数: 38600 | 10 http://sports.espn.go.com/espn/wire?section=oly&id=8215052
Column: What's up with China's swimming success?
Updated: July 30, 2012, 2:40 PM ET
Associated Press
15
18
3
Email
Print
LONDON -- What are they on? Or are they?
When Chinese swimmers started blowing rivals out of the water in London's
Olympic pool, whispers quickly followed. Is China cheating the sport again,
as it did in the 1990s, when drug-fueled, muscle-bound swimmers emerged from
nowhere to beat the world? Alain Bernard, the 2008 O... 阅读全帖 |
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b********n 发帖数: 38600 | 11 http://cluborlov.blogspot.com/2014/11/the-only-way-to-stop-empi
Dear friends,
The final days of US empire are fast approaching. Perhaps its end will pass
slowly and gradually, or perhaps the event will unfold rapidly and
catastrophically. Maybe chaos will break loose, or maybe its demise will be
organized well and proceed smoothly. This nobody knows, but the end of
empire is coming as surely as day follows night and sun follows rain.
Overexpansion, overreach and over-indebtedness will take their... 阅读全帖 |
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x****6 发帖数: 4339 | 12 你说得非常对。现在其实还没与一个好的数学语言来描述生物,我跟很多搞计量生物学
的物理学家也聊过,大家的共识就是目前还没有共识:适合于描述生物的数学还没有被
找到,有可能生物现象能够启发对新的数学语言的创造。
另外一个难点就是绝大多数的生命现象是远离均衡点的,non-equilibrium
statistical mechanics其实是和生物最相关的物理分支,但是物理学家对这个话题了
解得也不多。
我赞同你的说法:以微分方程为基础的模型在生物上的应用有很大局限性,例外是SDE
,问题是这门数学分支也还没有完善,很多分析只能基于最简单的假设,比如白噪音。
可能更好的思路是cellular automaton那样的模拟。虽然没有分析解,但是可以通过大
规模模拟exhaust parameter space.进而获得统计规律。
路。
路。 |
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x****6 发帖数: 4339 | 14 也要看什么物理,老杨搞得高能物理是那样。但是统计物理里的 非平衡动态系统 就不
一定了。另外还有如cellular automaton之类的系统,根本没法用传统的数学工具去严
格描述,只能靠模拟。 |
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w*********g 发帖数: 30882 | 15 看完这篇文章,求求你们别胡吹中国大数据云计算已经超过美国了。美国对于大数据、
云计算技术的理解和掌握,不是国内那些专家能够企及的。
==============================================
分享到:
时间:2017-03-31 10:42
•来源: 中华元智库
作者: 吴裕彬
浏览:241
评论:0
字号: 大 中 小
仅仅用美国人民的觉醒和黑天鹅般的奇迹来解释特朗普的当选,就无法看清美国政治版
图已经发生了一个根本性的转变,无法看清其将对美国政治的动向,乃至世界格局产生
极其深远的影响。特朗普奇迹的背后有深刻的金融本质,而金融本质最终决定政治。在
揭示特朗普革命金融本质之前,让我们先来看看一场发生在华尔街的技术革命,而这技
术革命在很大程度上奠定了特朗普革命的金融和科技基础。
特朗普背后神秘金权力量:大数据这样改变总统选举!
1.关于特朗普的美国,你们全错了
至今特朗普的当选依然被许多人认为是美国人民自我觉醒的一场革命,因为几乎所有的
观察家都一致认为特朗普在竞选的时候是被所有的美国富豪和主流媒体... 阅读全帖 |
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x****6 发帖数: 4339 | 16 能写得出公式来的问题都不是问题。
架不住很多问题写不出公式,如game of life之类的cellular automaton,蛋白质折叠。 |
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x****6 发帖数: 4339 | 17 围棋这个例子比较特殊:游戏规则明确无误,不存在什么摸棱两可,隐藏信息。类似的
情况还有cellular automaton, game of life。
而人类面对的大多数实际问题,规则并不清楚,甚至是根据条件变化的,并且很多情况
并不知道,或者了解不全面。 |
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W*****B 发帖数: 4796 | 18 最近借着黑豹的东风涌现出很多新词儿,让人迎接不暇,什么是Afrofuturism?
How the Afrofuturism behind Black Panther and Get Out combines social
justice and sci-fi
Afrofuturist ideas are at the core of both films.
In the fictional African nation of Wakanda, beads made of “vibranium” heal
bullet wounds, and a bulletproof suit absorbs and stores the energy of
hostile blows. Levitating trains cruise past vaulting skyscrapers with
thatched roofs, as saucer-shaped aircraft carve arcs in the sky.
Wakanda, a fantasy nation that serves... 阅读全帖 |
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x****6 发帖数: 4339 | 19 这总结的很好啊
作为生物千少,我更跟兴趣的是什么时候数学家能够把cellular automaton之类的、简
单local法则导致全局性衍生现象的过程 背后的数学理论阐释出来。 |
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x****6 发帖数: 4339 | 20 fractal 应该也是属于这个领域的研究对象,
领域应该叫做science of complexity,核心内容就是emergent property, cellular
automaton是一种表现形式。目前基本还停留在观察现象的阶段,因为对应的数学还没
有被发明出来。
有意思的是,很多生命现象能用这个conceptual framework来刻画。 |
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m**********e 发帖数: 12525 | 21 就是个reaction diffusion equation的差分映射
妈的,这都是20年前被人搞烂了的玩意
你去看看pattern formation上面的review,成千上万的文章,
你把它们映射到差分方程上去,就成了你的cellular automaton
现在也就你们生物学还在搞这玩意,物理门搞这玩意都发不了文章了 |
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C****o 发帖数: 1549 | 22 他都说ising模型可以理解为cellular automaton的最简形式。
你不能光看那张图说话
看他的描述 主要还是在于局域相互作用引起的整体效应
不得从平衡态开始研究?
: 看来你的大脑缺乏敏锐性
: 这明显是非平衡的,至少也是个趋向平衡的过程,妈的,你竟然能说是ising模型
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x****6 发帖数: 4339 | 23 reaction diffusion equation 不就是图灵搞的吗
cellular automaton和它有关系,但是并不是一回事。前者用一个PDE就能描述,就可
以用微分方程的工具去分析,后者没有这么一个master equation。分
析起来很困难。 |
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c***c 发帖数: 21374 | 24 https://www.cnn.com/2018/06/14/world/albert-einstein-travel-diaries-intl/
index.html
Einstein, who died in 1955, describes the Chinese as "industrious, filthy,
obtuse people," remarking how they "don't sit on benches while eating but
squat like Europeans do when they relieve themselves out in the leafy woods."
They are "a peculiar herd-like nation," he writes, "often more like
automatons than people."
"It would be a pity if these Chinese supplant all other races," he later
adds. "For the likes o... 阅读全帖 |
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发帖数: 1 | 25 二十世纪最伟大的思想家,科学家爱因斯坦,一生为人类科技发展进步作出了无与伦比
的贡献。称之为近代文明的偶像大师实在不为过。这位被纳粹德国驱逐的犹太人,还被
广泛誉为全球反种族主义的典范。然而就这位被世人膜拜仰望的科学巨匠,却因今年六
月出版的游记被陷入一场不大不小的种族主义文字风波。
这本游记“The Travel Diaries of Albert Einstein” 是根据了爱因斯坦从1922 到
1923 年间在亚洲的旅行日记整理而成书,文字中少不了大师对哲学,人生,社会和自
然的的感想和见解,当然也记载了他在亚洲的所见所闻和感触。
在贫穷落后的中国的所见所闻带给了爱因斯坦很深刻的印象,他在日记里充满了对中国
底层阶级的同情和恻隐之心 - “他们大多数是负担沉重的,男男女女为五分钱工资天
天敲石子。他们似乎鲁钝得不理解他们命运的可怕。他们好像是受折磨的、鲁钝的、不
开化的民族,而同他们国家的伟大文明的过去好像毫无关系。……这是地球上最贫困的
民族,他们被残酷地虐待着,他们所受的待遇比牛马还不如”
然而最令人瞩目的却是这本书中对中国人的贬低,鄙视和侮辱性的描述。其语言之辛辣
刻薄,... 阅读全帖 |
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a*****y 发帖数: 33185 | 26 https://starcraft.fandom.com/wiki/Critter
Critter
English
EDIT
SHARE
Critters are neutral, mostly harmless creatures found on various worlds in
the StarCraft universe. Unlike other fauna, they are present in the game.
StarCraftEdit
Main article: List of StarCraft critters
Critters play very little role in the game itself, as they cannot defend
themselves and grant no reward for attacking them. However, as biological
units, they can be targeted by the queen's Parasite and Spawn Broodling
spells a... 阅读全帖 |
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发帖数: 1 | 27 “even those reduced to working like horses never give the impression of
conscious suffering. A peculiar herd-like nation [ … ] often more like
automatons than people.”
但这不仅适用于旧社会的中国人。大部分人不都这样。 |
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j***j 发帖数: 9831 | 28 U.S. Army Considers Replacing Thousands of Soldiers With Robots
http://spectrum.ieee.org/automaton/robotics/military-robots/arm
the Army is studying the possibility of reducing the size of a brigade from
4,000 soldiers to 3,000 in the coming years. To keep things just as
effective while reducing manpower, the Army will bring in more unmanned
power, in the form of robots. |
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d*r 发帖数: 58 | 29 Gabby Douglas’ hair, female Chinese athletes as stoic automatons, ‘plastic
Britons,’ and advertisements featuring monkeys on gymnastic apparatus—if
one thing has characterised media coverage of the 2012 Summer Olympics, it’
s rampant racism. While the Olympics are ostensibly an event that brings the
world together, the racism that runs through much of the coverage serves to
underscore the differences between ‘us’ and ‘them,’ whether
commentators are making snide references to African runners or ... 阅读全帖 |
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i****x 发帖数: 17565 | 30 冯诺依满的贡献早就不能用钱衡量了 别的不说,没他对eniac的工作,程序员这个职业
就不会存在。gates要是知道你把他俩比,估计都要被折杀了。
wiki上列了他的主要贡献领域,给你参考下
Abelian von Neumann algebra
Affiliated operator
Amenable group
Arithmetic logic unit
Artificial viscosity
Axiom of regularity
Axiom of limitation of size
Backward induction
Blast wave (fluid dynamics)
Bounded set (topological vector space)
Class (set theory)
Decoherence theory
Computer virus
Commutation theorem
Continuous geometry
Direct integral
Doubly stochastic matrix
Duality Theorem
Density matrix
... 阅读全帖 |
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g*******y 发帖数: 1930 | 33 suffix tree写一周比较正常,两三天搞定很牛了,一天能搞定是大牛,
面试时间能写出来?除非你专行就是搞这个。 |
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g*****u 发帖数: 298 | 34 这说的我还好受点。。。
我在career cup上见到有人说他面试时,interviewer让他当场写出一个suffix tree,
我倍感打击。。。让我写个trie可能还行,suffix tree麻烦的多。。。 |
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g*******y 发帖数: 1930 | 35 阿三吹牛你也信啊,呵呵
可能他自己连suffix tree和trie有啥区别都没搞清楚,面试最多就是让写个trie吧 |
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m******9 发帖数: 968 | 36 如果对方要求写这个,我猜想 要么觉得candidate是牛人,要么就是故意想整死对方 |
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m********o 发帖数: 427 | 38 两周多以前面的,一直比较忙,没空写。职位就是那个application support engineer
第一轮是HR打电话,瞎砍了一通。
第二轮是Technical interview。主要是Math, C++, MATLAB (后两个是我选的)
Math的问题有:
怎么用加减乘除算sinx,什么时候deterministic finite automaton,什么是NDFA,
用DFA来表示NDFA的空间复杂度会变成多少。什么是P,什么是NP。Maximum flow算法。
还有一些简单的公式推导。
编程的问题问了很多概念性质的,process和thread的区别,什么是parallel
computing,什么是multi-threading,什么是mutex,什么是多态,为什么要用虚拟析
构,pass by value和pass by reference的区别. #include 是啥意思。。。
MATLAB问怎么转置,怎么判断变量类型,怎么找帮助文件等等。 |
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S******t 发帖数: 151 | 39 It is easy to come up with an $O(SL)$ algorithm for this problem but what is
good about this problem is that it actually has a linear time solution:
Let’s first make some notations clear:
1) |S| -> The length of S.
2) |L| -> The number of words in the list $L$.
3) $len_L$ -> The length of each string in $L$.
First we use an Aho-Corasick automaton to find out the occurrences of all
patterns. The time complexity of this step is $O(|S| + |L| * len_L + z)$
where $z$ is the number of output matches. ... 阅读全帖 |
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r*********n 发帖数: 4553 | 40 帅是帅,可是要写出来一个deterministic finite automaton的transition matrix还
是不容易
相对来说Z Algorithm直观很多。 |
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j*******g 发帖数: 3 | 41 This position is mainly targeted to people who is going to graduate in this
December or graduated and got a master's degree within 1 year. If you are
interested please send resume to [email protected]
/* */
Requirement:
Whether you’re plotting a course for SpyMouse on your mobile or your palms
are sweaty from clutching your controller during intense games of FIFA,
chances are you’ve played an EA game. And if you haven’t, well, what are
you waiting for? In an industry that’s changing every ... 阅读全帖 |
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j*******g 发帖数: 3 | 42 This is an industry hire, if you are interested please send resume to
[email protected]
/* */
Whether you’re plotting a course for SpyMouse on your mobile or your palms
are sweaty from clutching your controller during intense games of FIFA,
chances are you’ve played an EA game. And if you haven’t, well, what are
you waiting for? In an industry that’s changing every day—whether it’s
through new social channels, advancing technology, new audiences or unique
opportunities for monetization—EA ... 阅读全帖 |
|
j*******g 发帖数: 3 | 43 This is an industry hire, if you are interested please send resume to
[email protected]/* */
Whether you’re plotting a course for SpyMouse on your mobile or your palms
are sweaty from clutching your controller during intense games of FIFA,
chances are you’ve played an EA game. And if you haven’t, well, what are
you waiting for? In an industry that’s changing every day—whether it’s
through new social channels, advancing technology, new audiences or unique
opportunities for monetization—EA i... 阅读全帖 |
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w********r 发帖数: 8704 | 44 偶两年前用过roomba,试过两次就退了,主要是看丫干活心里着急,撞墙不说,关键是
随机走步效率太低。今年买了neato,一试就非常喜欢。它俩的区别有大侠已经总结的
很好,网上也有不少,这个IEEE的review讲的比较详细,
http://spectrum.ieee.org/automaton/robotics/home-robots/irobot-
注意roomba干活时间是neato的4倍,换句话说充满一次电neato能干4倍的活,这是一个
非常重要的指标,直接影响到电池的寿命,而电池是这类东东maintenance最贵的一项
,按照本版的经验,roomba一到两年需要换电池,neato的电池偶还不知道多长时间一
换,应该会好很多。有人说同样一个地点,roomba会走好几遍,更干净,偶的是木地板
,偶试过用neato先吸一遍,清理干净垃圾盒,再吸第二遍,垃圾盒基本上没啥东西,
所以地板走一遍足够了,再多就是浪费,地毯偶没经验。前面说过,neato省时间,可
以一次吸整个一层楼,不用在各个房间抱来抱去,所以在使用上变得非常简单。
neato不好的一点是没有边刷,墙边几厘米的区域没法... 阅读全帖 |
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u*****a 发帖数: 6276 | 45 没有那么多的天才。我的孩子就一个普通人,能学会一种语言就烧高香了。哪敢奢望能
学两门以上啊?比如我读了下面一篇孩子写的文章,觉得还行:这个小作者有自己独特
的声音和感想。至于中文能不能写出同样水平的文章,我估计很难,因为语言的不可转
换性局限了这种可能。所以还是在孩子小的时候挑一种语言当母语比较好,如果你的孩
子不是语言天才的话。
Consequences of Inconsequentiality
This isn’t the first time invaders have overrun the place; the area shows
signs of coming and going everywhere. The bare trunks, draped in their dull
camouflage-pattern colors, bear numerous battle wounds: names etched on worn
-away bark, phrases, and symbols, all speaking of a past and of people.... 阅读全帖 |
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G**T 发帖数: 2610 | 46 你坚持“哭解决不了问题”,非常好,但远远不够。
需要做的是,在她不哭的情况下,了解问题并跟她一起把问题解决掉, 让双方都满意
。 这样次数多了,她才会相信你哭不是她最好的选择。
现实是,她哭了你们修理她,她如果不哭估计你们也不会觉得有问题需要解决 - 大
人的行为自然都有自己的道理,怎么会有问题呢?
这是培养天才或opposite的节奏。
本质在于,几乎所有会给家长无理哭闹的小孩,都自动发现了什么是local optimal
solution: 不哭更没人理了。哭闹的话,是个high risk strategy: 可能会如愿,也可
能会被惩罚更糟。
孩子是小型的人。 人是个automaton,会自动去寻找path to satisfaction的。 家
长的任务是给她设计并执行哪些是可能的path, 哪些是不可能的path,这不是简单说
说道理就能完成的,所以人们才说言传不如身教。 |
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s******r 发帖数: 5309 | 47 而且每次他提的股票,你第二天买,2周之内涨个10%不是
问题。
This is called cramer effect. Because his viewer base is so large, and most
are simple automatons following instructions, they pump the stock price.
However, one cannot always short these stocks to make big profits because
most of those have very good fundamentals, so the downside is not very
significant. |
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c*****r 发帖数: 8227 | 48 攻击Bank of America只是预演。
Greetings, Institutions of the Media.
We are Anonymous.
The events transpiring within Wall Street have caught our eye.
It seems that the government and Federal agencies enjoy enforcing the law a
little bit too much. They instate unjust laws as mindless automatons,
blindly following orders with soulless precision.
We witness the Government enforcing the laws that punish the 99% while
allowing the 1% to escape justice, unharmed, for their crimes against the
people.
We have o... 阅读全帖 |
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S*******s 发帖数: 10098 | 49 为什么这部电影能打动这么多人的心?
【 以下文字转载自 WashingtonDC 讨论区 】
发信人: llin (一路陌生人), 信区: WashingtonDC
标 题: 偶然的情人节悸动
发信站: BBS 未名空间站 (Thu Feb 14 18:32:55 2013, 美东)
1970 版的简爱对我触动很深。80年代初上译厂的配音。简爱主题音乐让我这个乐盲从
小就牢记在心至今不忘。
“Do you think I am an automaton? — a machine without feelings? and can
bear to have my morsel of bread snatched from my lips, and my drop of living
water dashed from my cup? Do you think, because I am poor, obscure, plain,
and little, I am soulless and heartless? You think wrong! — I have as much
soul... 阅读全帖 |
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l*******e 发帖数: 3566 | 50 第一章,the Chinese mother
这一章,就是引起轩然大波的登载wsj上的第一部分,一上来就以一堆极度极端的not allowed list把读者砸晕再说。
我承认中国家长把学业的priority放在sports前面,但是她还是和我们有代沟了。我们渐渐也enjoy育儿的过程了,在人前也会夸孩子(而不是never compliment your children in public),也在渐渐重视鼓励孩子的efforts,(而不是that medal must be gold)。
第二章,sophia
这个孩子是个天使娃,小时候睡整觉,不哭不闹。有需要才会哭。妈妈在工作,她在一边安静地看着。(作者同学,你就偷着乐吧!)这种天使娃可遇不可求。我回忆了一下大宝小宝18个月前的生活,我们经历过严重的reflux,湿疹,晚上要抗在肩上哄睡,厌奶等等吧,更不用说小宝早产了两个月。恩,我嫉妒作者同学。
然后她就说sophia非常的intellectually precocious。举的一个例子是,18个月认识字母表。不过她没有说她是怎么教的,或者孩子是怎么学的。
其实18个月认识字母表没... 阅读全帖 |
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