2013年2月1號 中午12點
人生第二還第三次戒菸
第一次在一年多前被小英國壓著走到戒菸診所
莫名其妙拿了藥
很有用 但失敗
這一次心裡想著
也差不多了吧勻勻
到現在一個多月了 中間抽了幾根但沒影響戒菸的決心
當初開始抽煙想著的就是 戒菸的毅力我應該有吧?
過了四年
這毅力似乎來了
但做研究的毅力似乎比這更難
難怪成功的幾位教授 聽說以前論文的一個算式都要幾百包菸才能成就
在當兵之後
每天拉肚子 輕重都有
體力變差
呼吸變很不順
很容易累
怎麼運動 體重還是不斷上升
唱歌的主題曲從外套變睡覺
毛病不斷
都以為是老了 或 當兵讓身體變差
在戒菸一個月後發現
馬的
這些狀況都沒了 或 慢慢恢復成大學時候的情況
看了有機會減肥成功囉!
Thursday, March 12, 2015
Sunday, December 9, 2012
Proof that e^i(pi) = -1
Proof that e^i(pi) = -1Date: 06/02/99 at 00:48:10 From: Nathan White Subject: e^[i(pi)] = -1 How can it be proven that e^[i(pi)] = -1? And why does it matter? Date: 06/02/99 at 06:28:07
From: Doctor Mitteldorf
Subject: Re: e^[i(pi)] = -1
Dear Nathan,
When you do algebraic manipulations, you want to be sure that
everything that you do legally "makes sense," which means that
equations should have solutions, so you're not just casting around in
vain. You can easily write real equations that don't have real
solutions. But if you expand to complex numbers, then all algebraic
equations become solvable. How then do you make sense out of complex
numbers in the exponent?
The Rosetta stone is the Euler equation:
e^(ix) = cos(x) + i sin(x)
You can verify that this equation makes a sensible definition by
expanding the two sides as Taylor series in x. You can also
differentiate both sides and see that the answer is self-consistent.
Thirdly, you can use the formula for cos(2x) and sin(2x) to show that
the right side has the property you expect from an exponential, so
that e^[i(2x)] = [e^(ix)]^2.
Once you believe the Euler equation, you have a pretty easy time of
it. If you let x = pi/2, then the real part is zero
e^[i(pi)] = cos(pi) + i sin(pi) = -1 + 0*i
If you are happy to accept integration of complex functions, a quick
and reasonably rigorous proof follows (from Dr. Anthony's answer in
the Dr. Math archives):
Euler Equation
http://mathforum.org/dr.math/problems/dale9.13.97.html
Let z = cos(x) + i.sin(x)
dz/dx = -sin(x) + i.cos(x)
= i[cos(x) + i.sin(x)]
dz/dx = i.z
so dz/z = i.dx
INT[dz/z] = INT[i.dx]
ln(z) = i.x + const
z = e^(i.x + const)
Now from z = cos(x) + i.sin(x) when x=0, z=1 so the constant = 0
Thus z = e^(i.x)
That is cos(x) + i.sin(x) = e^(i.x)
When x = pi -1 = e^(i.pi)
0 = e^(i.pi) + 1
or e^(i.pi) + 1 = 0
This equation combines the 'famous five' most important numbers in
mathematics, 0, 1, e, i, pi.
- Doctor Mitteldorf, The Math Forum
http://mathforum.org/dr.math/
|
Saturday, December 8, 2012
Monday, December 3, 2012
Saturday, December 1, 2012
so tired recently
Staying in the library all day, I am so tired, tiered inside.
Right now, I am just back in my dorm and listening to Radiohead's house of card, and I have a sense of fullness in my soul. Probably, that is because I just talked to my sister on the phone.
Anyway, life is still on its own way, you can choose to stay on the same spot or walk through that.
Sunday, November 25, 2012
Saturday, November 24, 2012
機率問題
Q: 有一試劑對某疾病有九成五的正確性,此疾病每千人有一人感染。
你測得的結果為陽性,你得病的機率為多少?
A: 2%(若測一千人,有五十人會是陽性,而只有一人得此病。)
為什麼測一千人會有五十人是陽性?
你測得的結果為陽性,你得病的機率為多少?
A: 2%(若測一千人,有五十人會是陽性,而只有一人得此病。)
為什麼測一千人會有五十人是陽性?
Thursday, November 8, 2012
Friday, November 2, 2012
Padfone 2
Don't expect me like those tech geeks sharing professional article. Here I just want to list out why I bought it and how it use after all.
This one is the first smartphone bought by myself, must I pay so much attention to optimize my utility, subject to my constraint. In the first place, I want to buy Iphone 5, the reason just like others. Also, I want to buy a pad for reading. I was thinking about buying a kindle paperwhite ($about NT$ 3500) plus Iphone 5. However, I don't whether it is NCC's faults or Apple, I couldn't fucking wait any longer. At this time, here comes the Padfone 2 from Asus. The sincerity and the cheap price ( same Ram capacity, like 16G, padfone2 is the same price as Iphone 5, I don't need to buy a pad or kindle though.). Comparing few other smartphone, I made my decision.
16G for example
Padfone 2 One X+ Iphone5 fuck yourself HTC J Note II
Price 23900 20900 fuck yourself 16900 22900
CPU 4 core 4 core 2 core (WTF?) 2 core 4 core
Camera 1300 800 800 800 800
Ram 2G 1G 1G 1G 2G
screen size 4.7' 4.7' 4' (???) 4.3' 5.5'
Form the comparing what I care, Iphone 5 can go fuck itself, and I want to decide which of padfone 2 and Note II I want. The choice is clear, I need a pad for reading, so I must choose Padfone 2.
After I got it ( mine is 32G version, and only paid NT$21000 instead of NT$27000 and half 3G prece, I think it is because of NP) , it is very smooth using, doesn't like others after using a while, it becomes slow. I think it's because of the Ram. So now to the point of comparison of Android and iOS. The Android's drawbacks are not from the same system( ? don't really get it, I'm not major in computer science, maybe some others can help me figure it out?) and it supports doing loads of apps at the same time, which slows the using because the ram is small. However, the hardware is upgrade, so the merits of Android comes out.
The great thing is I spent not so much money ( compared to I phone + kindle ) and I got pad, which can play games and lots of other things instead of only reading e-books.
Drawbacks like the speed of taking pics is slower, not so pretty are not affecting me. And I love Padfone 2.
This one is the first smartphone bought by myself, must I pay so much attention to optimize my utility, subject to my constraint. In the first place, I want to buy Iphone 5, the reason just like others. Also, I want to buy a pad for reading. I was thinking about buying a kindle paperwhite ($about NT$ 3500) plus Iphone 5. However, I don't whether it is NCC's faults or Apple, I couldn't fucking wait any longer. At this time, here comes the Padfone 2 from Asus. The sincerity and the cheap price ( same Ram capacity, like 16G, padfone2 is the same price as Iphone 5, I don't need to buy a pad or kindle though.). Comparing few other smartphone, I made my decision.
16G for example
Padfone 2 One X+ Iphone5 fuck yourself HTC J Note II
Price 23900 20900 fuck yourself 16900 22900
CPU 4 core 4 core 2 core (WTF?) 2 core 4 core
Camera 1300 800 800 800 800
Ram 2G 1G 1G 1G 2G
screen size 4.7' 4.7' 4' (???) 4.3' 5.5'
Form the comparing what I care, Iphone 5 can go fuck itself, and I want to decide which of padfone 2 and Note II I want. The choice is clear, I need a pad for reading, so I must choose Padfone 2.
After I got it ( mine is 32G version, and only paid NT$21000 instead of NT$27000 and half 3G prece, I think it is because of NP) , it is very smooth using, doesn't like others after using a while, it becomes slow. I think it's because of the Ram. So now to the point of comparison of Android and iOS. The Android's drawbacks are not from the same system( ? don't really get it, I'm not major in computer science, maybe some others can help me figure it out?) and it supports doing loads of apps at the same time, which slows the using because the ram is small. However, the hardware is upgrade, so the merits of Android comes out.
The great thing is I spent not so much money ( compared to I phone + kindle ) and I got pad, which can play games and lots of other things instead of only reading e-books.
Drawbacks like the speed of taking pics is slower, not so pretty are not affecting me. And I love Padfone 2.
Sunday, October 21, 2012
What is Love?
Love is commitment.
這是我最近聽到最好的解釋,特別在此紀念。 2012/10/17
若是用人都是從自己出發的利己看法來看的話,怎麼看都是deae-end。
這是我最近聽到最好的解釋,特別在此紀念。 2012/10/17
若是用人都是從自己出發的利己看法來看的話,怎麼看都是deae-end。
A Clockwork Orange
P.27
人被賦予了自由意志,可以由此來選擇善惡。只能行善或者只能作惡的人,就成了發條橘子 ── 也就是說,他的外表是有機物,具有可愛的色彩和汁液,實際上僅僅是發條玩具,由著上帝、魔鬼或無所不能的國家(他日益取代了前兩者)操縱。徹底善與徹底惡一樣沒有人性,重要的是道德選擇權。惡必須與善共存,以便道德選擇權的行使。
sandel 討論串
延續之前例子,有一個人花很久的時間排隊滿演唱會的票,有人出價10萬跟他買,他賣了。你會說,這沒有效益最大化,因為出高價的人沒有排隊排很久的人想看那場演唱會。這樣想我覺得是錯的。因為效益最大化是綜合的考量而非單一事件的陳述,你可以假設排隊的那個人家裡有個重病的女兒,他需要醫療費用,所以他女兒治癒的效果對他來說相當大,綜合考慮的結果,他決定售出他手上的票。
你會覺得怪怪的地方在於,有錢人好像付出了相對較少就得到他想要的,這樣的交換對沒錢的人好像不公平,不過這就是資本主義,用錢去衡量事務。資本主義可怕的地方是任何事物都有一個價錢,大家不能接受,因為這樣不就是富者恆富、窮者恆窮,這也沒有錯,我們身處這樣的社會,我們自己最清楚。但我們能接受嗎?我們一定都會說我們不能接受,但是換個角度想,若你成為了一個當權者、一個有錢人,你不會這樣做嗎?我想你也會的。所以我覺得這不是個人的問題,而是政策的問題,資本主義就是向錢看齊,也比較自由。我們嚐到了資本主義果實下的自由,大家都不能忘懷,較沒錢的人卻不能接受什麼都用錢解釋,這就是人本身的問題了。不過還有一個點,就是我們能夠選擇嗎?我能夠選擇自己生下來是在資本主義或是社會主義的國家嗎?我們能夠選擇自己生在有錢的家族或是沒錢的家庭嗎?我們並不能選擇,那這樣我們要怎麼辦?這個問題超難,我現在都還不能回答。
繼續闡述,我覺得效果最大化是個人經驗累積的產物,隨著我們在生活中累積經驗,我們逐漸找到屬於“我們個人的”效果最大化方式,也因為它牽涉到個人的選擇,人都會被騙,被別人騙也被自己騙,所以我們常常不能做到經濟學所謂的效益最大化選擇。經濟學試圖解釋社會的現象,我們都知道他的模型不是完美的,但是他的科學辦法讓我們能夠有一個參考的依據,不過他用的是統計學的量化辦法,統計能解釋的是母體,解釋個體的能力就沒有那麼好。這次的討論,常常牽涉到個體的選擇,有時候沒有辦法完美解釋我覺得是可以理解的。
Thursday, October 18, 2012
Beta
Beta就是在講系統性風險,大於1表示個股報酬率的波動幅度
比市場大;小於1則比市場小。
β=Cov(X,M) / Var(M)
要計算某一個股的β值,首先我們先列出該股每日的收盤價(P)與加權指數(I),再算出其每日漲跌幅(見圖一)。算出個股的漲跌幅( 就是公式中的X )與加權指數的漲跌幅( 就是公式中的M, 也就是巿場 Market之意 ) 之後,代入β值的公式內即可算出。如果只從代數上的意義來看,要明瞭β值在投資學上的意義比較困難,但如果從幾何學上的觀念來看,就比較容易明白其代表的意義,以下我們用簡單的幾何圖形來解釋。
圖二是一個座標圖,橫軸代表加權指數的漲跌幅,縱軸代表某一支個股的漲跌幅,因為目前漲跌停板為7%,所以用正負7來代表。假如只有4個樣本點,那將之畫在圖上如圖所示,此時我們要畫出一條直線,使得該直線與各個樣本點的「垂直距離平方的總和」為極小,那麼這條直線的「斜率」就稱為β值。
如果你學過統計學的最小平方法(OLS),或者學過計量經濟學,那麼對β值就不陌生,因為在計算一般最小平方法時,所算的Y=α + βX,其中的β,就是我們現在所說的β值,兩者完全相同毫無差異。
Saturday, October 13, 2012
要用的數學
- Linear Algebra
高斯消去法 check
高斯約旦消去法 check
- The Calculation Difference Between Real Number And Matrix
1. AB is not equal to BA
2. AC=BC,
if C is not equal to 0,
A is not equal to B.
(AB)T=BTAT
A*AT=symmetric
(AB)-1=B-1A-1
Ito's Lemma
Stochastic Method
Brownian Emotion
Friday, October 12, 2012
The Pricing of Options and Corporate Liabilities
Fischer Black/ University of Chicago
Myron Scholes/ MIT
The Valuation Assumption
a) The short-term interest rate is known and is constant through time.
b) The stock price follows a random walk in continuous time with a variance rate proportional to the square of the stock price. Thus the distribution of possible stock prices at the end of any finite interval is lognormal. The variance rate of the return on the stock is constant.
c) The stock pays no dividends or other distribution.
d) The option is "European", that is, it can only be exercised at maturity.
e) There are no transaction cost in buying or selling the stock or option.
f) It is possible to borrow any fraction of the price of a security to buy it or to hold it, at the short-term interest rate.
g) There are no penalties to short selling.
幹後面的數學我看不懂...........
Myron Scholes/ MIT
The Valuation Assumption
a) The short-term interest rate is known and is constant through time.
b) The stock price follows a random walk in continuous time with a variance rate proportional to the square of the stock price. Thus the distribution of possible stock prices at the end of any finite interval is lognormal. The variance rate of the return on the stock is constant.
c) The stock pays no dividends or other distribution.
d) The option is "European", that is, it can only be exercised at maturity.
e) There are no transaction cost in buying or selling the stock or option.
f) It is possible to borrow any fraction of the price of a security to buy it or to hold it, at the short-term interest rate.
g) There are no penalties to short selling.
幹後面的數學我看不懂...........
7 果实与种子的传播风&自动弹力
Aircraft designers have tried to build the wing as efficient to this one, but failed. Even the faintest # by the slightest therm is enough to lift this little glider with seated passenger, and so extended its flight.
#Plams #preseated #humanity and building fixed-wing gliders, and not any gliders. They created helicopters too. #Sickmore seadge. The balance between the weight of the seed and length and the width of the wing is exact and perfect. A slightest heavier seed or a shorter or narrower wing, and the whole thing will fall like a stone. A #tristar plant produces a revolving seeds with six plates. And aircraft designers have yet to copy that. Or this. Plants also use explosive. Jet propulsion. This is squirting cucumber. And this #humalien bosson. Its seeds catch upon a flood of liquid, such as pressure. The slightest touch make it explode. The force is so great, that the seeds can be shot away as much as 15 feet.
羽翅果實植物不僅僅製造像滑翔翼的翅果,他們也生產直升機。#$%^&。種子的重量和羽翅的長寬有著最精準的平衡,稍微重的果實或一點點短窄的翅膀都可以使翅果像石頭般的墜毀。[某種三星什麼的植物]生長出有著六片槳葉的旋轉種子,就連現在的航空器設計師都無法做出像那樣的直升機,或是這個。植物有時候也會用爆炸,像這個噴射小黃瓜。還有這個[什麼鬼花的],她的種子有膨壓,會感觸到最微弱壓力,一點點輕微的外力都可以使他射出(好糟糕)。那噴射的力量相當大,他的種子可以被傳播到15呎外的區域。
(for the record.英文再進步再改吧)
Saturday, October 6, 2012
things need to be achieved in graduate school
1. master in statistics software/ Matlab and VBA
2. get FRM
3. have one or two intern experience
4. exchange student
2. get FRM
3. have one or two intern experience
4. exchange student
Wednesday, October 3, 2012
maturer mentally
What is the reasoning point of women maturer than men?
More thoughtfully?
Then follow the point of above, I don't think so.
And the statistics are usually biased or inconsistent, or even wrong modelling.
Yet, not seeing a formal essay or paper investigating about it.
More thoughtfully?
Then follow the point of above, I don't think so.
And the statistics are usually biased or inconsistent, or even wrong modelling.
Yet, not seeing a formal essay or paper investigating about it.
Monday, October 1, 2012
Man and Wife
Was talking with willow about her girlfriend that did she ever done anything that makes him feel "oh man, it is because of her age."
However, he told my that, girls doing things capriciously, without planning, don't care much about the consequences, is not because of their age but their nature: exclude those women who put their goals on being rich, career successful, generally, girls' goal will on family ultimately, so they don't have the commensurate social responsibilities with men, so they can do whatever they want literally.
Same thought. So you girls don't ever tell me again that you girls are maturer than us mentally, no, you don't because you don't really have to face the result after failure.
However, he told my that, girls doing things capriciously, without planning, don't care much about the consequences, is not because of their age but their nature: exclude those women who put their goals on being rich, career successful, generally, girls' goal will on family ultimately, so they don't have the commensurate social responsibilities with men, so they can do whatever they want literally.
Same thought. So you girls don't ever tell me again that you girls are maturer than us mentally, no, you don't because you don't really have to face the result after failure.
Thursday, September 13, 2012
Matcha latte
Screenplay_ Matcha latte(主角敘事)
「不是沒有感覺,只是感覺總是在你一個人的時候找上你。」
[某間咖啡店]
桌上擺了杯抹茶那堤。
(坐在亮面木製以上)
那天,去了家離家裡有點遠的咖啡店,我也搞不懂為什麼要到那麼遠的咖啡店裡坐,拿到這樣就代表一天做了比較多的事情嗎? 比較充實嗎?你只是在瞎忙罷了......
(看著手裡的書)
最近,我愛上了文學小說,陸陸續續看了好幾本,麥田捕手、蒼蠅王、大亨小傳之類的,其實我也沒有看得很懂,對於那類的小說,就是好想懂了什麼,好像又什麼都不懂,不知道為什麼,我覺得很適合現在的我,反正就當作順便念英文吧。
(看著桌上的飲料)
我又點了抹茶那堤,真的是在跟自己開玩笑,都過了一年了,早應該走出來了吧。你不是說自己已經好很多了,難道你那些話都是說假的?......說來說去,你就是在騙自己。其實,人很容易被自己騙的,不管是為了自我安慰、自我鼓舞等等理由,常常,我們被自己騙了還不自知。謊言,是我們的保護色。
(踏出店外)
倒數第三個暑假阿,感覺就快過了。
[去租腳踏車] 不過高雄人會去租也是滿奇怪的......
(腳踏車上)
我一向很喜歡高雄的寬大馬路,一心二聖三多四維五福六合七賢八德九如十全,日制時期規劃的棋盤式道路,不像台北的路狹小又車多,一堆單行道,高雄的道路真的友善太多了。不過我還是想留在台北工作,感覺主要的機會都還是在台北,高雄似乎留不住年輕人阿,身邊每個朋友都在北中南唸書,之後也要工作了,幾乎沒有人留在高雄,回高雄朋友都不在,難怪我都一個人。
(哼歌)
I’m a creep, I’m a weirdo.
What the hell am I doing here.
I don’t belong here.
......
(看着有太陽的天空)
這也是高雄的好,不像台北動不動就下雨,下雨心情真的很難好起來,尤其一連下一個禮拜,真佩服台北人,怎麼可以忍受那樣的天氣。有太陽沒下雨的天氣就是好!
(看到美術館廣告)
......
[高雄夜晚街上]
最快樂的,就是談話中的那些心照不宣,妳總是知道我在想什麼,但是妳對我未來的計劃卻往往不能認同。也許,妳希望的就是我對妳多一點感性,對其他人多一點理性。這就是長大的過程吧,一條成為有能力男人的成長道路,讓你的肩膀和胸膛可以輕描淡寫地讓他人舒服地倚靠又不會感到不自在,那樣地游刃有餘。其實,我在勉強我自己我看得出來,我並沒有輕易地就放下了,嘴巴上雖然幾句帶過,但是瞭解我的人應該是一眼看穿吧,我的演技果然很差。
仍然關注妳,我無法自己,天蠍座的占有慾此時表露無遺。
然而事後的念舊,才不是妳要的愛情。
傷害妳並非我的本意,失去妳是我至今最後悔的事情。
我曾擁有妳,現在,只能怪自己沒有好好地珍惜。
不是沒有感覺,只是感覺會在你一個人的時候找上你。
不是不想念,而我也只能在她人的香水味中尋找妳熟悉的氣息。
走過熟悉的街景,我的心游盪在谷底。
欣賞妳哪裡,我想是妳的生命力。
過去,都讓它過去。
不知道下一次見面,第一句會是哪一句。
若是不期而遇,微笑,應該是我第一個表情。
若問有什麼延續,我想,是抹茶那堤。
[高美館]
(大門口)
第一次到這裡來,北美館倒是去了好幾次。
(展場內)
我一直都覺得,關於美術館,展場間的空氣是靜止的,看展的人群是流動的,一動一靜之間,夾著美好的藝術作品。
(發現女孩)
那次展覽,我遇到一個女孩,還記得我第一個強烈的印象是「一個人看展的女生,我好想認識一下。」我不常有這樣的感覺的,路上漂亮的女生很多,但你總不會每一個都想跟她說話吧,一定要有什麼事情觸動到你的點。之後,我就一直在找尋所謂的perfect timing,像是眼神的交會、站在身旁的乓然那種感覺,可是一直都沒有出現那樣的時機,我想根本就沒有perfect timing吧。我也在想,第一句話要說些什麼,應該說「妳好漂亮噢,不知道可不可以和妳做個朋友?」不行,這樣也太像膚淺了,還是「可不可以和妳做個朋友?」就好?我曾經在咖啡店聽過一個講話很大聲的正妹和她的友人說道「最近好無聊噢,都沒有人跟我搭訕。」所以,女生是喜歡有男生跟她們搭訕的吧?
(女孩走出出口)
那時我想,只是說一句話,又不會死,你剛剛在幹嘛?!如果你沒說的話連機會都沒有。
(女孩坐在樓梯口用手機)
我的機會來了......
(走過女孩)
.......幹,我還是說不出口......
(停下腳步)
不管怎麼樣,你不會有什麼損失。
(轉頭走回女孩身邊)
「妳好,我可以和妳做個朋友嗎?」他說。
她的視線從i-Phone螢幕上轉移到阿木臉上,用狐疑的眼神看著他。
阿木緊跟著說「我看妳好像是一個人看展。」
「沒有,我和我父母一起來的,他們現在還在裡面。」 女孩說。
阿木突然有點傻了, 他想「對,她似乎在等人......」
一陣沈默。
「你還是學生嗎?」 女孩主動接著說。
「對,我剛當完兵,要回去唸書。」阿木說。
「那我是姐姐噢。」女孩意有所指地說。
(得到女孩的電話,女孩和父母走了)
她父親的那時的背影至今還是讓我印象深刻,異常的高大嚴峻。
[咖啡廳]
我提前了30分鐘到了約定的咖啡廳,並在桌上擺了一本紅色書皮的精裝書本,我和她說用紅色的物品來作辨識身份的工具,搞得好像要見網友一樣。
我滿腦子盡在想等會要講什麼呢?她應該還沒到吧?也不知道自己在緊張什麼......後來來想自然心吧,自然就好。
(女孩來了)
沒想到她真的出現在我的面前了,這麼的真實,我很緊張,我可以感覺得到我的心臟在胸後跳的很快。但後來發現,我們還滿聊得來的,話題自然而然地展開, 就像丟球一樣,你把球丟給他,她把球丟回來,一遍又一遍,什麼都不用想,相當自然地。聊了一陣,我才突然發現我們都還沒點飲料。
「你想喝什麼?」他問。
她看著menu想著......「我要冰的抹茶那堤,我最喜歡個了。」她說。
阿木臉上露出一個複雜的表情。
桌上擺了杯抹茶那堤。
THE END
08/14/2012 16:23 Kaohsiung
Justin H.
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