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Les Enfoirés | WordReference Forums
Bastoune and Carnesecchi have it right, as well as David314 (but not exactly fitting this one).
Enfoirés is normally an insult (fuckers, assholes, dickheads ...) quite strong, but here it refers to Coluche (and what followed after him), who gave the word a different meaning. He even used to greet his audience with "salut les enfoirés !", a daring feat ...
explained  français  show  expression  humor  artist  charity 
21 days ago by aries1988
Retenue sur la caution : le propriétaire est-il obligé de faire les travaux ? - Blog LocService
Le propriétaire a-t-il l’obligation de réaliser les travaux ?
Comme indiqué plus haut, le propriétaire peut faire une retenue aussi bien sur la base d’une facture que sur celle d’un devis réalisé par un professionnel. En effet, un devis est bien un justificatif valable aux yeux de la jurisprudence, même si aucune suite n’est donnée (Cass. Civ III : 3.4.01, n° 99-13668 ; Cass. Civ III : 2.10.07, n° 06-18142).

Conséquence : le propriétaire a le droit de procéder à une retenue sur le dépôt de garantie sans pour autant faire les travaux liés à celle-ci. De la même façon, si le propriétaire présente un devis d’un professionnel pour justifier la somme retenue puis décide plus tard de faire les travaux lui-même, il en a le droit.

Le locataire a donc tout intérêt à être attentif à la remise en état du logement (reboucher les trous dans les murs, faire les petites réparations, nettoyer de fond en comble,…) avant de faire l’état des lieux de sortie !
explained 
9 weeks ago by aries1988
为什么人的酒量有大有小?
有的人喝一点点酒就脸红,有的人干了一杯酒还若无其事。为什么人的酒量差别这么大?是练出来的吗?一个酒量小的人能不能通过天天喝酒来提高酒量呢?…
explained  alcohol  body  biology  drinking 
11 weeks ago by aries1988
Turbulence, the oldest unsolved problem in physics

because our understanding of turbulence over time has stayed largely ad-hoc and limited, the development of technology that interacts significantly with fluid flows has long been forced to be conservative and incremental. If only we became masters of this ubiquitous phenomenon of nature, these technologies might be free to evolve in more imaginative directions.

Motions of fluids are usually hidden to the senses except at the interface between fluids that have different optical properties.

For example, you can see the swirls and eddies on the surface of a flowing creek but not the patterns of motion beneath the surface.

The Navier-Stokes equation is difficult to solve because it is nonlinear. This word is thrown around quite a bit, but here it means something specific. You can build up a complicated solution to a linear equation by adding up many simple solutions. An example you may be aware of is sound: the equation for sound waves is linear, so you can build up a complex sound by adding together many simple sounds of different frequencies (harmonics). Elementary quantum mechanics is also linear; the Schrödinger equation allows you to add together solutions to find a new solution.

The idea is that the interesting dynamics occur at larger scales, and grid points are placed to cover these. But the subgrid motions that happen between the gridpoints mainly just dissipate energy, or turn motion into heat, so don’t need to be tracked in detail. This approach is also called large-eddy simulation (LES), the term eddy standing in for a flow feature at a particular length scale.

The idea is that, while the low-speed solution is valid at any speed, near a critical speed another solution also becomes valid, and nature prefers that second, more complex solution. In other words, the simple solution has become unstable and is replaced by a second one. As the speed is ramped up further, each solution gives way to a more complicated one, until we arrive at the chaotic flow we call turbulence.
turbulence  Physics  science  history  explained  example  LES 
december 2018 by aries1988
Twitter
RT : 有想过敲一个马克杯内壁不同地方为什么声音不一样吗:

有想过剪开两个粘在一起的莫比乌斯环会得到什么好玩的形状吗:

时枝正的人生经历非比寻…
acoustic  idea  coffee  video  explained 
december 2018 by aries1988
Question about PISO in IcoFoam -- CFD Online Discussion Forums
Issa shown in his paper, that is enough to do two or three PISO corrections, so that it isn't necessary to check the satisfaction of momentum and continuity.
Coming back to Titio's question, I think the problem isn't the recalculation or not of H(U) but the basic hypothesis made for PISO method. PISO method get rid off the non-linearity of convective acceleration term supposing that U^(n+1)~U^(n) in order to linearize the equations. So the momentum predictor is calculated for U^(n+1) but when the convective acceleration term is assembled, U^(n) is used for the flux.
This is useful in Co < 0.5 range in usual problems, but I think one must be more restrictive when high non-linearities are present.
explained  piso 
november 2018 by aries1988
FvVectorMatrix questions -- CFD Online Discussion Forums

Continuity Eq: div(U) = 0
and with source term: div(U) = S

Discretised momentum eq. A*U = H - grad(p)
->
U = H/A -(1/A)*grad(p) = Ustar - (1/A)*grad(p)
H/A is the momentum-predictor value of U, ie Ustar.
if we insert this in the continuity eq. it yields

div(U) = div(Ustar - (1/A)*grad(p)) = S
->
div(Ustar) - laplacian(1/A, p) = S
or
laplacian(1/A, p) = -S + div(phi)
where phi is Ustar evaluated on faces.
have a look at icoFoam and you will easily see where to insert S.
explained  cfd 
november 2018 by aries1988
OpenFOAM guide/The PISO algorithm in OpenFOAM - OpenFOAMWiki
The PISO (Pressure Implicit with Splitting of Operators) is an efficient method to solve the Navier-Stokes equations in unsteady problems. The main differences from the SIMPLE algorithm are the following:

No under-relaxation is applied.
The momentum corrector step is performed more than once.
explained  cfd 
november 2018 by aries1988
OpenFOAM guide/The SIMPLE algorithm in OpenFOAM - OpenFOAMWiki
The SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) allows to couple the Navier-Stokes equations with an iterative procedure, which can be summed up as follows:

Set the boundary conditions.
Solve the discretized momentum equation to compute the intermediate velocity field.
Compute the mass fluxes at the cells faces.
Solve the pressure equation and apply under-relaxation.
Correct the mass fluxes at the cell faces.
Correct the velocities on the basis of the new pressure field.
Update the boundary conditions.
Repeat till convergence.
The steps 4 and 5 can be repeated for a prescribed number of time to correct for non-orthogonality.
algorithm  cfd  explained 
november 2018 by aries1988
IcoFoam - OpenFOAMWiki
A highly annotated version of the code is shown below. Ferziger and Peric, below, give a fairly standard overview of PISO, but OpenFOAM uses a notation and form closer to Jasak and Rusche's theses. References to PISO documentation are:
explained  cfd  algorithm 
november 2018 by aries1988
Waking Up with Sam Harris: #133 — Globalism on the Brink
Legitimate grievances with immigration https://overcast.fm/+Ic2iBh0LA/32:11
Impact of automation https://overcast.fm/+Ic2iBh0LA/39:34
Universal basic income, solution? https://overcast.fm/+Ic2iBh0LA/39:42

It's one thing for the Chinese to steal our intellectual property, it's another for them to steal our strategy."
civic  nationalism  technology  crisis  transformation  society  politics  trump  2018  globalism  explained  cosmopolitanism  podcast 
october 2018 by aries1988
Twitter
因为 邻 的繁体是 鄰,麟鳞嶙磷都是前鼻音 lín
chinese  pronunciation  mandarin  explained 
october 2018 by aries1988
Pourquoi change-t-on d'heure deux fois par an ? - Direct Energie
L’idée n’est appliquée pour la première fois qu’en 1916 en Allemagne et adoptée définitivement en France en 1973 pour amortir la crise pétrolière. Elle sera généralisée à toute l’union européenne en 1980, sur la base de ce même principe : profiter d’une heure supplémentaire d’éclairage naturel et ainsi faire des économies sur l’éclairage artificiel. Aujourd’hui 70 pays sont adeptes du changement d’heure. 

En pratique, le passage à l'heure d'été (+1h) se fait toujours dans la nuit du dernier samedi de mars tandis que le passage à l'heure d'hiver (-1h) se fait dans la nuit du dernier dimanche d'octobre.

La discussion est en cours mais elle devrait durer plusieurs mois encore. En tout cas, selon une consultation publique, 80% des Européens ont exprimé leur souhait de voir le changement d'heure être supprimé. Si la mesure disparaissait à l'avenir, pas moins de 510 millions d'Européens seraient concernés.
explained  history  energy  time  europe 
october 2018 by aries1988
人情、面子与关系:中国式人际关系背后的权力与话语权争夺

儒家在构思礼的时候,是用它来连接天人之间的关系的。在“天理人情”的说法中,理是天的运作规则,这个规则是自然规则,人不能改变,不能反抗,因此是命定的,而原初的情又是个人化的,能改变的,是随意的。在连接这个不变与变的过程中,先王(圣人)承天之道制定了礼,就是以天的名义来规范人的七情六欲,也就是想让人情来顺从天意。

孝,它不是作为生物性的后代对生者养者的自然感情的随意流露,而是对一种义务和伦理化的情感的控制。如果一个人能对自己父母有这份感情,然后将此感情再弥漫到长辈乃至于君王身上,最后就可以达到尽心知天命的境界,而人人如此便可以达到天下之大治。
theory  society  chinese  communication  confucianism  explained 
october 2018 by aries1988
日本与沙俄之战:一战的东亚版本
为了鼓舞日本国民,从1968年开始,作家司马辽太郎在《产经新闻》发表连载小说《坂上之云》,以明治陆军“骑兵之父”秋山好古、被评为“智谋如涌”的海军参谋秋山真之、创作俳句《法隆寺》的诗人正冈子规为主人公,描绘了从明治维新到日俄战争的30余年历史,希望以一本“乐观主义者的故事”来唤醒日本国民对于重建战后日本的热情。“坂上之云”便比喻 当年的日本人一边追逐着“山坡上的云”一边前进,来自明治时代的昂扬感激励起战后日本人重新建设经济强国。

历史上被称为“第〇次世界大战”的战争有很多,如丘吉尔认为普鲁士同盟与法奥俄同盟之间的七年战争(1756-1763)是最早的世界大战,拿破仑战争(1803-1815)、普鲁士统一战争 (1864-1871)都有过类似称呼。相比之下,日俄战争(1904-1905)得获此名的逻辑更为直接:正如二战爆发由一战结束后的“分赃不均”及过度制裁德国而埋下种子,一战爆发的始源也来自于日俄战争后国际关系的变动。

随着日俄战争走向尾声,沙俄的实力进一步遭到削弱,不得不从中国东北与朝鲜半岛退出,英俄矛盾骤然减小;另一方面德奥同盟的力量愈发强大,法国在北非殖民地面临巨大挑战,只能寻求英国的支持,这也促使英国与法国的盟友——沙俄之间越走越近。

日俄战争本质上是英国与日本、沙俄与法国两大利益集团在远东的一次博弈,战争虽然以日本取胜、沙俄落败,但两大集团却成功形成相互认同,进而以互相认可势力范围、签订协约为基础,成立“协约国”集团。从这个角度讲,第一次世界大战并不是“三国协约”,而是包括日本在内的“四国协约”。

倒退回“三足鼎立”时代,如果没有沙俄与日本之间矛盾升级,欧洲的利益关系很可能出现另一种形态:事实上英德两国在1900年已经达成《扬子江协定》,规定双方在华利益范围;1901年德国甚至提出与英国、日本结为“三国同盟”。如果同盟成立,那么一战的对立形态就不再是“英法俄”对阵“德奥土”,而有可能变成“英德”对阵“俄法”,那无论一战的结果如何,20世纪乃至于现代历史的发展都会完全不同。
1900s  war  japan  russia  diplomacy  explained  ww1  europe  china 
september 2018 by aries1988
包慧怡 | “绿人”和提着自己脑袋的圣人
不管怎么说,由于圣徒叙事图像学中有将圣徒与其受难时的刑具画在一起的肖像传统(比如圣凯瑟琳执轮子,圣劳伦斯执烤架,圣巴多罗买执匕首),而死于砍头的圣徒又人数众多,我们今天可以在雕塑和手抄本中看到大量提着自己脑袋的基督教圣人(120位之多),他们有个共同的名字叫 “持头圣人”(cephalophores)。当然,这些圣徒肖像距离“绿人”和异教头颅神的艺术形象已相去甚远,但我们仍能看到受难、死亡与新生的主题在“头颅”中不断发展和变奏。
paganism  christianity  architecture  church  paris  explained 
september 2018 by aries1988
[ASK] Convert Color/Black to White - ImageMagick
To see what is going on, extract the alpha channel and the background image using
CODE: SELECT ALL

convert donut_black.png -alpha off donut_black_background.png
convert donut_black.png -alpha extract donut_black_alpha.png
explained  png  tool  color 
september 2018 by aries1988
TURBULENCE MODELS IN PHOENICS
1. Why turbulence models are needed
The small-eddy problem
The variations in space and time can be thought of as caused by a population of eddies of a wide range of sizes, orientations and speeds of rotation, which are in ceaseless and random motion.

Why the eddies cannot be ignored.

Although the details of the small-scale eddies are seldom of interest, their existence cannot be ignored; the reason is that their existence has large-scale effects.
These effects include:

Increased macro-mixing, an example of which is that the heat transfer from a hot turbulent fluid to the colder wall of the pipe through which it is flowing is much greater than it would be for a laminar flow.
Increased micro-mixing, an example of which is the greatly increased rate of chemical reaction between co-flowing streams of fuel and oxidant gases, when the velocity is raised to the critical level.
It is the role of a turbulence model to enable the effects of the eddies to be computed without simulating them in detail; whereby it should be stated that immensely more attention has been paid to the macro-mixing than to the micro-mixing effects.

A third approach to the problem of predicting the behaviour of turbulence phenomena can be regarded as combining some aspects of both DNS and macroscopic modelling. It is called 'Large-Eddy Simulation', commonly abbreviated to LES. Its nature is this:

- The CFD code is run in stepping-through-time mode, even when, turbulence fluctuations apart, the flow is steady.
- A macrocopic turbulence model is employed, but with modifications intended to represent only the eddies which are small compared with the cells of the computational grid which is in use.
eddy  explained  turbulence 
september 2018 by aries1988
从小吃到大的消炎药,直到学医了之后才看清它的真面目
“消炎”和“抗感染”是两个相关、但不能等同的概念。临床上的炎症许多是由微生物感染导致的,比如急性前列腺炎。这种情况下,抗菌可以起到消炎的作用。但有很多的、非常多的炎症和感染不直接相关,比如慢性无菌性前列腺炎,腰椎间盘突出引起的神经根炎,抗生素就不能“消炎”。这个时候把抗生素混作“消炎药”,会误导患者。
而抗生素的概念是一个舶来品。英文 Antibiotic,由“anti-”(对抗)、“bio”(生物)、“tic”(与什么有关的东西)组成,从语义和语序上完全对应“抗”“生”“素”三个字。顾名思义,它的作用是“对抗生物”,对抗什么生物?引起疾病的微生物,最常见的就是细菌。
除了之前提到的复方新诺明名字特别,其他的抗生素比较好区分,药名中带有 ** 霉素、头孢 **、** 沙星,全是抗生素。

医学上真正的消炎药,是一类以解热镇痛、缓解炎症反应为目的的药物,比如糖皮质激素、塞来昔布,还有缓解感冒症状的泰诺、百服宁等等。
explained  medicine 
august 2018 by aries1988
荷花和莲花有什么区别吗?还是都指的同一种花? - 知乎

莲:花柄和叶柄都高出水面,花瓣通常为粉红或白色。产莲子和藕(莲藕)。又称「荷花」。各种成语和古文中出现的基本都是它。Nelumbonaceae(莲科)Nelumbo(莲属)Nelumbo nucifera,曾划入睡莲科。睡莲:叶片浮于水面,叶片有一道深裂口。花也常浮于水面,昼开夜合(所以得名「睡莲」),花瓣常有红、紫红、白、黄等色。莫奈画的是睡莲。Nymphaeaceae(睡莲科)Nymphaea(睡莲属)。

我建议口头上用「荷花」指莲,用「睡莲」指睡莲,这样很明确。
botany  comparison  explained  baodi  moi 
august 2018 by aries1988
macos - OS X / Linux: pipe into two processes? - Stack Overflow
As tee copy to each file and also to standard output , and as >() will be see by tee as files, you have to write: prg1 | tee >(prg2) > >(prg3) to not dump the ouptut of prg1 on console (notice the supplementary >). – F. Hauri Oct 1 '13 at 21:00
bash  tee  explained  tips 
july 2018 by aries1988
Udon noodles: meet ramen’s quieter sibling | Financial Times
Buckwheat soba had been the predominant cheap noodle for the working class since the Edo period (1603-1868) so the younger generation saw wheat-based ramen (thin round noodles made firm and yellowish by the addition of alkaline salts) and udon (fat, soft white noodles) as exciting “foreign” food, in much the same way that postwar Europeans were attracted to the glamour of the American hamburger. More importantly, ramen cooking — still retaining a certain Chinese cultural “otherness” — was free of the rigid rules of traditional Japanese cuisine. Young cooks felt able to open noodle bars, to play fast and loose with new combinations and flavours and, in doing so, participated in a national wave of culinary creativity.

as in most Asian cuisines, texture is as vital a component of flavour as smell is to westerners. The ideal udon noodle must have koshi. There is no completely satisfactory translation into English, but it means something like “strength” or “firmness”. The noodle must have bounce, resilience, it must bite back.
explained  japanese  cuisine  udon  restaurant  london 
july 2018 by aries1988
git stash - Saving Changes | Atlassian Git Tutorial
Depending on what you stashed, a single git stash operation creates either two or three new commits. The commits in the diagram above are:

stash@{0}, a new commit to store the tracked files that were in your working copy when you ran git stash
stash@{0}'s first parent, the pre-existing commit that was at HEAD when you ran git stash
stash@{0}'s second parent, a new commit representing the index when you ran git stash
stash@{0}'s third parent, a new commit representing untracked files that were in your working copy when you ran git stash.
git  explained  commit  stash 
june 2018 by aries1988
What did Max Weber mean by the ‘spirit’ of capitalism? | Aeon Ideas
This modern ‘ethic’ or code of values was unlike any other that had gone before. Weber supposed that all previous ethics – that is, socially accepted codes of behaviour rather than the more abstract propositions made by theologians and philosophers – were religious. Religions supplied clear messages about how to behave in society in straightforward human terms, messages that were taken to be moral absolutes binding on all people. In the West this meant Christianity, and its most important social and ethical prescription came out of the Bible: ‘Love thy neighbour.’

The proliferation of knowledge and reflection on knowledge had made it impossible for any one person to know and survey it all. In a world which could not be grasped as a whole, and where there were no universally shared values, most people clung to the particular niche to which they were most committed: their job or profession. They treated their work as a post-religious calling, ‘an absolute end in itself’, and if the modern ‘ethic’ or ‘spirit’ had an ultimate found­ation, this was it.
explained  weber  book  idea  theory  capitalism  work 
june 2018 by aries1988
西亚国家希望将澳大利亚逐出亚足联,澳大利亚的存在是否挤压了国足和西亚进入世界杯的机会? - 知乎

亚洲一共4.5个参加世界杯的名额。日韩在亚洲的地位基本稳如泰山了,基本高于其他亚洲球队至少一个档次;如今澳大利亚的实力并不输于日韩,加入之后基本也占用一个名额。如此一来,包括西亚国家在内的其余亚洲国家,也只能抢最后那一个半名额了(半个名额有一半可能还完全没戏)。所以,肯定很多国家感到不爽,觉得澳大利亚抢了自己的机会。

作者:赵乾
链接:https://www.zhihu.com/question/27902248/answer/38706602
来源:知乎
著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。
fun  explained  asia  australia  football  2018  worldcup 
june 2018 by aries1988
CFD中的LES湍流模型
LES中的亚格子尺度应力(SGS),其表示模化的速度分量对解析的速度分量的影响(τ在OpenFOAM的代码中用B来表示)。

我们需要对SGS进行模化,最简单的模型即为通过Boussinesq假定来实现,其也为其他更高级模型的本源。首先我们将τij表达为偏应力以及法向应力部分,且其中的法向应力部分被认为是各项同性的

SGS模型的主要作用就是进行湍流波动进行耗散9。因此SGS模型需要给定一个合适的耗散量。因此LES需要使用中心差分格式,因为这一类格式不会添加附加的耗散。所有的迎风格式都会对SGS模型添加附加的耗散特性。

周期边界的距离应该大于最大的涡旋尺寸的二倍以上。
explained  LES  ofm 
may 2018 by aries1988
包子 几个蒸包子的诀窍 失败是一件很困难的事情 - YouTube

配方:
包子皮:
温水 450克 1+3/4 杯 加1大勺调整量
酵母 4克 1小勺
中筋面粉 750克 5杯(蓬松量法)

包子馅:
去肠线虾肉 400克
生抽 15克 1汤勺
白胡椒粉 1克 1/4 小勺
新鲜羊腿肉 250 克
葱白 50克
生姜泥 6克
盐 8克 1 茶勺
五香粉 小于 1克 1/8 小勺
花椒粉 小于1克 1/8 小勺
鸡蛋清 1
香油 4克 1小勺

冷水上锅蒸 上汽以后蒸十五分钟 蒸汽散尽开锅
recette  chinese  baozi  bun  explained  best 
may 2018 by aries1988
How To Make Friends And Influence People: Inside the Magic Weapon of the United Front
Stream How To Make Friends And Influence People: Inside the Magic Weapon of the United Front by The Little Red Podcast from desktop or your mobile device
china  party  organisation  world  influence  propaganda  explained  book  podcast 
april 2018 by aries1988
Letter of Recommendation Fatbergs
A hideous collective self-portrait rendered in oil and wet wipes.
explained  city  trash  underground  sewer  home  kitchen 
march 2018 by aries1988
Front or Back? /l/ – /ɫ/ and /n/ – /ŋ/
In English there are two pairs of consonants that present something of a problem for quite a few people - and what doesn't help is that very often, native speakers also don't pay a lot of attention to the difference in their own speech... First, let's consider the difference between the two L-sounds of English;…
english  explained  comparison  pronunciation 
march 2018 by aries1988
Pimplefoam - residuals not converging -- CFD Online Discussion Forums
(2) get back to meshing and try a better mesh. if you are running latest OpenFOAM version 1706, you may run chekcMesh -writeAllFields to get scalar fields depicting the mesh quality parameters in paraview.
convergence  cfd  explained 
march 2018 by aries1988
'Charlottesville': A Government Story About Nuclear War - The Atlantic

Charlottesville, the small but elegant center of learning, culture, and trade in central Virginia, was not hit either. This monument to the mind and manner of Jefferson retained its status as a kind of genteel sanctuary, momentarily immune to the disaster that had leveled the cities of the nation.
scifi  history  nuclear  war  usa  government  life  explained  policy  survive 
february 2018 by aries1988
‘Daisy-chain’ gene drive vanishes after only a few generations | New Scientist
Each element contains one or more genes that contribute towards the whole gene drive. In Esvelt’s design, element A can only copy and paste itself if element B is present. Element B can only copy and paste itself if element C is present. And element C, crucially, cannot copy and paste itself at all – it can only spread by normal breeding, to half of offspring.

The idea is to release thousands of mosquitoes, say, carrying all three elements. When they mate with wild mosquitoes, all the offspring will inherit element A and B, but only half will inherit element C. In the following generations, element B will spread rapidly and A will spread even more rapidly, but C will gradually die out. Once it does, B will start to disappear, and finally A will too.
biology  engineering  explained  dna 
february 2018 by aries1988
C++: Where to initialize variables in constructor - Stack Overflow
down vote
accepted
In short, always prefer initialization lists when possible. 2 reasons:

If you do not mention a variable in a class's initialization list, the constructor will default initialize it before entering the body of the constructor you've written. This means that option 2 will lead to each variable being written to twice, once for the default initialization and once for the assignment in the constructor body.

Also, as mentioned by mwigdahl and avada in other answers, const members and reference members can only be initialized in an initialization list.

Also note that variables are always initialized on the order they are declared in the class declaration, not in the order they are listed in an initialization list (with proper warnings enabled a compiler will warn you if a list is written out of order). Similarly, destructors will call member destructors in the opposite order, last to first in the class declaration, after the code in your class's destructor has executed.
c++  explained 
february 2018 by aries1988
梁文道:廣東人就該說廣東話?

這類言論出現的背景,是因為在北方人看來,粵語、潮語和客語這三種語言都是很難理解,甚至十分難聽的「南蠻鳥語」,它們和它們所承載的風俗文化皆是在近代所謂的中原文化底下被歧視的對象。在民族主義開始形成,現代國家的觀念逐步興起的年代,這三個語群的文人和知識份子反擊偏見的辦法,並不是乾脆的另起爐灶,尋求自主認同;反而是利用語言等各種資源的重新描述,去訴說一個華夏文化和他們的深遠關係的故事。這個故事的主旨不是一個和國家文化截然不同的地域文化,卻是中國文化在地方上的完美體現。

幾乎一切圍繞着身份認同的言論,都帶有事實和規範等兩個部分,都試圖從你是個什麼人的事實,推導出你應當如何表現,如何行為,以及如何思考的結論。

唸哲學的人,大概會關心你是個什麼人的事實,如何可能推出你應當如何做的規範式結論。

從這種角度來看,身份認同可能不是一個從事實推出規範結論的推導過程;而是一個因為我想當某種人,所以我才看到了某種事實的逆向運動。
region  explained  canton  culture  hongkong  china  independence  comparaison  nation  conflict  language  moi  philosophy 
february 2018 by aries1988
Modify boundary fields
forAll(field.boundaryField(), I)
{
scalarField& bScalarField = field.boundaryField()[I];
bScalarField = 123;
}
programming  explained  moi  ofm 
january 2018 by aries1988
CFD Education Center
This website is a platform on which visitors can discuss Computational Fluid Dynamics (CFD) and get some feedback from CFD experts or other visitors.

One major advantage of this blog is that it works in parallel with different courses taught in fluid mechanics and fundamental books in numerical methods.

The structure of the blog is based on different levels of CFD (elementary, basic, intermediate and advanced) which will be mentioned in the topic of each post. Many common problems of fluid mechanics are approached by proposing discussions about their main aspects and some codes for solving them.

All visitors are welcomed to participate in discussions and suggest solutions. Furthermore, the questions or problems, which are not fully solved during the discussion, will be answered frequently (e.g. every 10 days) by experts.
cfd  primer  explained  moi  resource  fluid-mechanics  learn 
january 2018 by aries1988
Using an expression in substitute command | Vim Tips Wiki | FANDOM powered by Wikia
When the replacement string starts with \= it is evaluated as an expression.
vim  explained  replace 
january 2018 by aries1988
regex - Regular Expression usage with ls - Stack Overflow
You are confusing regular expression with shell globbing.
bash  explained  regex 
january 2018 by aries1988
Sub-grid Scale (SGS) Stress Models in Large Eddy Simulation
The simulation of turbulent flow has been a considerable challenge for many decades. There are three main approaches to compute turbulence: 1) the Reynolds averaged Navier-Stokes (RANS) approach, in which all turbulence scales are modeled; 2) the Direct Numerical Simulations (DNS) approach, in which all scales are resolved; 3) the Large Eddy Simulation (LES) approach, in which large scales are computed, while the small scales are modeled. I really like the following picture comparing DNS, LES and RANS.
numeric  cfd  LES  comparison  explained 
january 2018 by aries1988
/ɕ/与/ʃ/有什么区别? - 知乎
上图是[ɕ],下图是[ʃ]。从图中我们发现它们两者的共鸣腔收窄位置大致都是在牙槽嵴(alveolar ridge)后,也就是所谓的postalveolar,而区别在于[ʃ]的收窄长度大于[ɕ],[ɕ]的收窄为舌叶(舌面前的三角区)与龈后硬颚穹(tongue blade contacts the roof)构成,而[ʃ]的收窄为舌叶与牙槽嵴后区域和舌面前与硬颚的连续收窄(the blade of the tongue behind the alveolar ridge, and the front of the tongue bunched up ("domed") at the palate)。因此我们也很好理解为什么从感知语音学上能发现其更随机湍也更尖锐,因为其收窄造成小管变长,高频放大,而且小管越长,湍流也越明显。而造成这种差异的重要一点是为了调节其接触面积,舌尖的位置是不同的,题主可以自己尝试一下。发[ɕ]的时候舌尖应抵住下齿,而发[ʃ]的时候并不会,这样,上图上也能看到。
explained  english  japanese  pronunciation 
january 2018 by aries1988
Palato-alveolar consonant - Wikipedia
These sounds are similar to the alveolo-palatal sibilants [ɕ] [ʑ] and to the retroflex sibilants [ʂ] [ʐ], all of which are postalveolar consonants. In palato-alveolars the front of the body of the tongue is domed, in that the front of the tongue moves partway towards the palate, giving the consonant a weakly palatalized sound. They differ from other postalveolars in the extent of palatalization, intermediate between the fully palatalized alveolo-palatals and the unpalatalized retroflexes.
explained 
january 2018 by aries1988
Chinese Pronunciation - I with J, Q, X
The following are the IPA symbols for this section’s pinyin consonant sounds:

Mandarin: ji [tɕ] English: "j" [dʒ]
Mandarin: q [tɕʰ] English: "ch" [tʃ]
Mandarin: x [ɕ] English: "sh" [ʃ]
chinese  explained  comparison  learn  pronunciation 
december 2017 by aries1988
Neuf clés pour (enfin) comprendre la cryptomania

puis aux jeux d’écriture informatique : les euros qui vont et viennent sur vos comptes en banque n’ont de réalité que parce que chacun les reconnaît et que les banques en organisent la comptabilité. Cet argent est dépendant des Etats, des banques centrales et n’a de valeur que parce qu’il est adossé à une économie, l’euro en Europe, le dollar aux Etats-Unis.

L’avènement du bitcoin marque une étape supplémentaire : c’est un code informatique, inviolable et individualisé. Pas besoin de banque ou d’autorité centrale pour garantir son authenticité. Ces qualités font que le bitcoin est qualifié d’or 2.0.
explained  bitcoin  2017  game  history 
december 2017 by aries1988
改写数学历史的百万美元大奖
具体的,克雷研究所把这个百万美元大奖问题分为两个问题:

初值问题(柯西问题):如果给定初始的速度和压力的解是有限的,证明存在或者不存在有限的速度场和压力场(且整体的能量是有界的)符合NS方程;

周期问题:如果给定初始的速度和压力的解是周期的,证明存在或者不存在周期的速度场和压力场(且整体的能量是有界的)符合NS方程;

两个问题的解还要保证空间能量的有界。

最通俗的解释就是:对于一个没有任何障碍物、突然改变的能量等突发事件,是否存在一个光滑的解。

更通俗但不严谨的解释就是:数学家们无法求解这个方程。

2007年,陶哲轩写了一篇文章名为“Why global regularity for Navier-Stokes is hard”的博客。在这篇文章中,他认为求解类似NS方程这种的偏微分方程组就像寻找一个大尺度的定量的可以模化的特性,来对不可以预测的行为进行限定。

然而在NS方程描述的流体运动中,并不存在这样一个大尺度的变量。唯一存在的就是流体的全部动能,以及流体内由于摩擦消耗的少部分能量。虽然这些使我们明确知道的,但是这并不是我们理解NS方程的建设性方向。

如果NS方程真的要被求解,要么发现这样一种大尺度的变量来控制全局的能量防止blow-up,要么我们需要一种全新的数学方法来理解。
fluid  mechanics  explained  maths  research 
december 2017 by aries1988
Another Failed ISIS Attack

ISIS hates Christians less than it hates most non-ISIS Muslims, and the things it hates about Christmas are hardly the aspects of the holiday that find expression in advertisements in the Port Authority, which are more likely to be selling Rockettes tickets than to be stressing the corporeality of a triune God. Yes, ISIS hates Christmas. But they hate everything else Americans do, too.

For now, the Christmas tradition looks just as it did before ISIS, with ISIS-proscribed pleasures like pork sausage and mulled wine, both freely enjoyed in mixed company. The war on Christmas continues, but so does Christmas itself, on both sides of the Atlantic.
isis  christmas  explained  deutschland  market 
december 2017 by aries1988
Hans Rosling, physician and statistician, 1948-2017

Rosling, who has died aged 68, was the closest thing statisticians had to a rock star. His most famous talk, 2006’s The Best Stats You’ve Ever Seen, has been watched online more than 11m times. Its ambitious scope and sweeping narrative epitomised Rosling’s ability to rise above the ebb and flow of current affairs and see generational trends.

It led him to conclude that on most measures of human progress — the impact of climate change being a notable exception — most countries were improving rapidly.

Public perceptions had not kept up with the pace of economic and demographic development and much of the media was hobbled by its adherence to false balance, he said. The world is discussed in terms of feelings and ideologies rather than as an area of knowledge, he once told the Financial Times.
leader  statistics  communication  science  world  data  debate  politics  ideology  optimism  explained  population 
december 2017 by aries1988
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