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全部话题 - 话题: sin
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s***u
发帖数: 1911
1
来自主题: TrustInJesus版 - How much can a Christian sin?
zt
How much can a Christian sin and still say he or she is a Christian? Every d
ay? Every hour? Constantly and continually? As a regular practice of life? J
ust how much can a Christian sin and still say they're a Christian?
There are two general extremes on this issue of "How much can a Christian si
n?"
VIEW #1 "Christians Can't Sin."
On one extreme are those who argue a real Christian can't sin, because being
delivered from sin is what being a Christian is all about. These folk argue
that if y... 阅读全帖
l*****l
发帖数: 363
2
1, sin对cos说:虽然我们相爱了,但我总是感觉不对。
cos说:哪里不对呢?
sin说:我总觉得我们是在三角恋。
2, sin的爸爸问sin的妈妈:sin现在正交的女朋友是谁啊?
sin的妈妈说:sin正交的应该是cos吧。
3, sin对cos说:我除了你,心中还有一个人。
cos生气地说:她是谁?
sin说:tan。
4, sin对cos说:买这么一大堆衣服,你这是想玩儿什么啊?
cos说:我这是想玩儿cosplay。
5, cos问sin:sin兄,我是你的什么啊?
sin说:你是我的alpha。
cos撒娇说:啊?原来我是希腊字母啊!
sin说:这样,我就可以把你抱在括号里了。
6, sin对cos说:世界上最遥远的距离不是天和地,而是 pi/2。
7, cos对sin说:你这辈子干过什么坏事儿么?
sin说:也没什么大不了的,只有七件而已……
8, sin对cos说:今天不知道怎么回事,走在路上一会儿摔一跤一会儿摔一跤,真是奇
怪了。
cos说:没什么大不了的,估计又有人把你带到绊脚公式里去了。
9, sin对cos说:有话能不能好好说,别跟人类似的,总喜欢把“我”叫成... 阅读全帖
f******h
发帖数: 1827
3
来自主题: Mathematics版 - sin^5(t)和cos^5(t)化简后是啥?
令x = cos(t) + i*sin(t)
那么
1/x = cos(t) - i*sin(t)
x + 1/x = 2cos(t)
x - 1/x = 2i*sin(t)
x^n = cos(nt) + i*sin(nt)
x^n + (1/x)^n = 2cos(nt)
x^n - (1/x)^n = 2i*sin(nt)
(2i*sin(t))^5 = (x - 1/x)^5 = x^5 - 5x^4 * 1/x + 10x^3 * (1/x)^2 - 10x^2 * (
1/x)^3 + 5x * (1/x)^4 - (1/x)^5
= x^5 - 5x^3 + 10x - 10 * 1/x + 5 * (1/x)^3 - (1/x)^5
= (x^5 - (1/x)^5) - 5(x^3 - (1/x)^3) + 10(x - 1/x)
= 2i*sin(5t) - 5 * 2i * sin(3t) + 10 * 2i * sin(t)
(2i*sin(t))^5 = 16 * 2i * (sin(t))^5 = 2i*sin(5t) - 5 * 2i * sin(3t) ... 阅读全帖
P******X
发帖数: 482
4
来自主题: Movie版 - 看了Sin City 2(有剧透)
并且专门重温了一遍sin city 1(真是好电影!)
frank miller 最失败的大概是当年没认识到Marv这个人物的价值。Marv在sin city1里
的那个故事,the hard goodbye好像是当年漫画出版时的第一个大故事。frank miller
心目中的Marv大概是sin city 2中Just Another Saturday Night里的Marv,或者是那个
抠那个大个眼珠的Marv。而实际上看了sin city 1的观众心目中的Marv是大胆无敌,不
守规矩但忠肝义胆,有勇有谋诛杀变态Kevin的大英雄。frank miller大概是听说后才
给Marv在sin city2中安拍了很多戏份。可惜人物塑造完全没有脱出他几十年前的漫画
,没有研究sin city 1爱好者想要看什么。太失败了!
sin city 2里由joseph,那个dark knight3里的配角演的那两个赌钱的故事要表现什么
?看了半天只觉得突出了senator roark。结果是如果说sin city1演活了Marv,那sin
city2演活了senator roark这个角色。比... 阅读全帖
m****a
发帖数: 9485
5
Psalm 51:5 Analyzed
Having shown what Psalm 51: 5 cannot mean, we now turn to some possible
views of the passage that do not violate portions of Scripture found
elsewhere.
(1) Since Psalm 51 is one of David’s penitent psalms revealing the anguish
resulting from his adulterous conduct with Bathsheba, some have felt that
verse five contains words that are figuratively put into the mouth of the
child conceived by that illicit union (2 Samuel 11:5), thus acknowledging
the sinfulness of that relation... 阅读全帖
m****a
发帖数: 9485
6
http://www.christiancourier.com/articles/276-original-sin-and-a
“Original Sin” and a Misapplied Passage
By Wayne Jackson
The doctrine of original sin—the notion that one is born into this world
hereditarily totally depraved—is widely believed in the religious world.
For example, the Augsburg Confession of Faith (1530), Lutheranism’s creed,
asserted:
[A]ll men, born according to nature, are born with sin, that is, without
the fear of God, without confidence towards God and with concupiscence,... 阅读全帖
C***m
发帖数: 120
7
来自主题: Quant版 - 问个老题 E(sin Wt)
0.
sin(W_t)=-sin(-W_t)
因为W_t ~ -W_t in distribution, E[sin(W_t)]=E[sin(-W_t)]
=>2E[sin(W_t)]=E[sin(W_t)]+E[sin(-W_t)]=0
p***y
发帖数: 18037
8
来自主题: Taiwan版 - Asia's most sinful cities
这真是一篇有趣的文章。台北的罪行可能对台湾人来说还是一种骄傲呢。
====================================================================
http://www.cnngo.com/explorations/life/asias-most-sinful-cities
Asia's most sinful cities
The best cities in Asia for indulging the devil on your shoulder
By Andrew Willis 20 April, 2011
Seven deadly sins -- seven lively Asian cities. We all stray off the path of
righteousness from time to time.
So if you're going to end up in hell due to a temptation to eat more than
your fair share of stinky t... 阅读全帖
d*********t
发帖数: 33
9
来自主题: JobHunting版 - 面试让写sin(x)算不算过分
要么从很小的x值算起,如果x很小,sin(x)=x,cos(x)=1;对于大的x值,用倍角公式
sin(2x)=2 sin(x) cos(x), cos(2x) = cos^2(x)-sin^2(x) 一步一步算上去。呵呵。
u***n
发帖数: 21026
10
我查了BA,BA可以换qantas去SIN,但是SIN之后回美国的话是BA去LHR转,这个太麻烦
了,有SIN走太平洋直接会美国的吗?
我能想到的就是JAL去日本换AA去LAX再AA去SEA
这个不知道在BA查得到吗?
s***u
发帖数: 1911
11
来自主题: TrustInJesus版 - Justification by Faith-->sinful Christian?
there is one rule in main-stream christianity. ppl cannot discipline thems
elves. read "Romans 6:14 For sin shall not be your master, because you are
not under law, but under grace." therefore a christian under grace can sin
anytime and repent later.
These main-stream christians often look down upon mornmns and JWs because th
ey are so disciplined. So mornons and JWs are thought to be "justfication b
y deeds".
so called christians, do you understand what is "justfication by faith"? Ca
n a ... 阅读全帖
m****a
发帖数: 9485
12
here are numerous Bible verses, in plain, literal language, that affirm the
innocency of infants, and Psalm 51:5 must not be arrayed against these.
Consider the following:
(1) Scripture plainly teaches that sin is not inherited. “[T]he son shall
not bear the iniquity of the father” (Ezekiel 18:20); every person is
responsible for his own conduct (Romans 14:12).
惟有犯罪的,他必死亡。儿子必不担当父亲的罪孽,父亲也不担当儿子的罪孽。义人的
善果必归自己,恶人的恶报也必归自己。
14:12这样看来,我们各人必要将自己的事,在神面前说明。
(2) Human sinfulness commences in that period of... 阅读全帖
s*****e
发帖数: 115
13
来自主题: Mathematics版 - sin^5(t)和cos^5(t)化简后是啥?
直接来Maple的combine命令的结果。这种东西就别把过程写出来了,会被人笑的。
sin^5(t) = 5/8*sin(t)-5/16*sin(3*t)+1/16*sin(5*t)
cos^5(t) = 5/8*cos(t)+5/16*cos(3*t)+1/16*cos(5*t)
r*******y
发帖数: 1081
14
来自主题: Quant版 - MS 2nd 电面题: Sin(x)/x 积分
a little more clear now.
using residual theorem, we can show \int_{-inf}^{-\epsilon} sin(x) / x dx
+ \int_{\epsilon}{inf} sin(x) / x dx (in the sense of v.p.)---> PI as
\epsilon ---> 0. But we also can show \int_{-inf}{inf} sin(x) / x dx
converge
so we can claim \int_{-inf}{inf} sin(x) / x dx = PI.
w*******y
发帖数: 60932
15
It finally happened. Sins of a Solar Empire is now available at STEAM! (
People have been requesting and asking about this for years and now that
Stardock no longer owns Impulse, having sold it to Gamestop, Stardock games
are going to go up on Steam!)
Link:
http://store.steampowered.com/app/201290
For a couple days you can get the complete Sins of a Solar Empire collection
(the game and both expansions) for $14.99 at STEAM.
Maybe this will be the impetus they need to create a dedicated Sins
disc... 阅读全帖
T*d
发帖数: 293
16
the difference between us and gentile is not only that we have faith but God
loves us. We are saved not through pray and repent, but through His grace. Do
you think Islamite can be saved? why? Sin and devil are used by God to bless
us. That's why we have sin. Sin and Crime are basically the same, because they
are all from the same source which is the devil. Do not get confused, as to
God there is no difference and the wage of sin or crime is death.


humans.
s**s
发帖数: 260
17
来自主题: NCAA版 - sin(x)+cos(x) = 3x -> x=?
(sins+cosx)^2=9x^2
1+sin(2x)=9x^2
draw sin(2x) and line y=9x^2-1
the intercept point is solution
s*********3
发帖数: 573
18
先说说这个新加坡航空著名的洛杉矶到新加坡航线 LAX-SIN
有两班, 一班是 A340-500直飞, 这个实际上是正在运营最长航线 的第二名(前十
名列表在 http://en.wikipedia.org/wiki/Non-stop_flight) , 全程8770 Miles,为了能Nonstop飞这么远, 新加坡航空在远程客机上把经济舱全部移除, 只保留商务舱, All business class, cool吧, 可惜运营情况不好, 马上这个线就会停飞了。。。 为啥卖的不好, 太贵。。。。 为啥太贵, 成本高。。。。怪圈吧。
第二班就是这次乘坐的A380 经停日本东京的LAX-NRT-SIN, 加起来飞行距离多了100
Miles。 这次选择它主要是为了体验A380的SQ商务舱。
这里是航线图
下面旅途从LAX机场正式开始, 因为A380超大+人多, 所以有自己专门的登机口, 而
且登机的时候是4个口 头等舱, 商务舱, 经济舱同时登机, 加快速度。看图, 这哪
是登机口, 分明就是登机门!
A380 分上下两层, SQ把下层放头等舱+经济舱, 上层 商务舱+部分经济舱。 即使... 阅读全帖
s****t
发帖数: 17096
19
来自主题: Movie版 - sin city周末只有600万票房?
另外一直迟迟不去看sin city2的原因有两个
一个是并不是完全不相关的故事,不管是前序还是后续,死了的人又活了,活了的人又活
了,会undermine sincity人物角色当年留下的冲击,bruce死了的时候个人英雄主义达
到了极致。已经完美了,不想再见到他。
另一个跟第一个原因差不多,怕看了以后sin city的地位也下降了。sin city应该是独
一无二的电影
还有一个就是拖得时间太长了
其实sincity结尾处可以接着这个引子继续拍全新的故事和全新的人物。
p******s
发帖数: 938
20
来自主题: Belief版 - Re: 为什么Ji du Jiao假设人有sin
标准基督徒对sin的解释是:Adam和Eva违背了上帝的命令吃了智慧树的果子,
显示了对上帝的不尊敬,他们与他们的子孙因此需为这一罪行负责。
这一说法的关键是“不尊敬”。
反基督教的一种说法:基督教认为食用智慧树的果子使人耳聪目明,是为原罪,
乃是否定智慧否定科学的做法。
我的想法:sin暗指人类精神上的痛苦。越有智慧的人这方面的痛苦越深刻越难以
消除。这与食用智慧树的果子而导致sin相符合。痛苦恰恰来自“耳聪目明,有
羞耻之心”。
所以我建议不论信不信教,圣经是不错的读物,里面确实是有些很有意思的东西。
这些东西几乎可以说是整个西方文化的基础。即使在后世的不少作家里也能
找到这些思想的回应:好比陀斯妥耶夫斯基,好比三岛由纪夫。虽然三岛由纪夫
是提倡索多玛美学价值的,呵呵。
m****a
发帖数: 9485
21
Preliminary Principles
First of all, it needs to be initially recognized that this passage is
Hebrew poetry. And Hebrew poetry abounds with bold and imaginative figures
of speech; it is frequently characterized by a freedom which departs from
customary forms of expression. It is, therefore, a mistake of great
magnitude to extract statements from poetical literature and thus employ
them as a foundation for doctrinal schemes.
This is precisely the error of the materialists (Watchtower Witnesses,
A... 阅读全帖
z********o
发帖数: 18304
22
约翰一书
3:9 凡从神生的就不犯罪,因神的道(原文作种)存在他心里。他也不能犯罪,因为他
是由神生的。
No one who is born of God will continue to sin, because God's seed remains
in him; he cannot go on sinning, because he has been born of God.
事实是:基督徒们信基督教之后都还继续犯罪(continue to sin)。
e****d
发帖数: 333
23
来自主题: Computation版 - 解方程x=sin(x) (转载)
【 以下文字转载自 Mathematics 讨论区 】
发信人: everid (everid), 信区: Mathematics
标 题: 解方程x=sin(x)
发信站: BBS 未名空间站 (Thu Jan 7 18:10:57 2010, 美东)
解析解方程:
x=A*sin(B*x+C). A,B,C已知。
结果最好能表示成 sin(n*C)的级数。不行也可以,给个近似的解,也行,但是就是要
解析。
请问怎么做?
多谢。
e****d
发帖数: 333
24
来自主题: Engineering版 - 解方程x=sin(x) (转载)
【 以下文字转载自 Mathematics 讨论区 】
发信人: everid (everid), 信区: Mathematics
标 题: 解方程x=sin(x)
发信站: BBS 未名空间站 (Thu Jan 7 18:10:57 2010, 美东)
解析解方程:
x=A*sin(B*x+C). A,B,C已知。
结果最好能表示成 sin(n*C)的级数。不行也可以,给个近似的解,也行,但是就是要
解析。
请问怎么做?
多谢。
g****t
发帖数: 31659
25
来自主题: Mathematics版 - 解方程x=sin(x)
方法一
1.把sin(B*x+C)/x 在a点写成级数,设此级数为y=f(x-a)
2.牛顿法求此级数的形式逆级数为g(y)
3.a+g(1)是你要的东西
求形式逆计数可以google: inverse formal power series newton
(在哪点展开,展开成何种级数,这取决于其他因素.)
方法二
设a为初始点,牛顿法迭代出来的东西就是你要的答案.
我觉得这两个方法等价,不过没仔细琢磨.

解析解方程:
x=A*sin(B*x+C). A,B,C已知。
结果最好能表示成 sin(n*C)的级数。不行也可以,给个近似的解,也行,但是就是要
解析。
请问怎么做?
多谢。
r****t
发帖数: 10904
26
来自主题: Quant版 - 问个老题 E(sin Wt)
E(sin Wt)=? 我算出来是
-1/2 E \int_0^t sin W_t dt, 结果是 0 么?
答案是
\int sin(x) f(x/sqrt(t))dx = 0
这个怎么得到的呢?各位大大先谢过了!
原问:
http://www.mitbbs.com/article/Quant/31223929_0.html
答案:
http://www.mitbbs.com/article/Quant/31223945_0.html
k*****y
发帖数: 744
27
来自主题: Quant版 - 问个老题 E(sin Wt)
Isn't it by definition?
E[ sin(Wt) ] = int_{-infty}^{infty} sin(x)*p(Wt = x) dx
where p(Wt = x) is even and sin(x) is odd.
w*******y
发帖数: 60932
28
Sin and Punishment: Star Successor for Wii at BestBuy $29.99
still $45+ at Amazon.
Link:
http://www.bestbuy.com/site/Sin and Punishment: Star Successor - Nintendo Wii/9903846.p?id=1218192429767&skuId=9903846&st=Sin & Punishment 2&DCMP=IBC
w*******y
发帖数: 60932
29
Sins of a Solar Empire - Trinity
This new bundle pack includes the original Sins of a Solar Empire, plus the
Entrenchment and Diplomacy expansions.
Link:
http://www.impulsedriven.com/sinstrinity
This is the cheapest they've sold all three combined. The last Sins of a
Solar Empire sale was $4 for the original game and the last time they had
the expansions for sale they were $15 for both.
Another game of note, is Sword of the Stars Complete:
http://www.impulsedriven.com/sotscomcol
for $5.99 ($2... 阅读全帖
s****n
发帖数: 174
30
- A reflection to "如果他们都不信了,你还信吗"
We could all become weak at times. Some were trivial, and yet some stumbled
and fell big time. However, none of the sins we experienced should be
treated lightly.
Mark 9:43~47
If your hand causes you to sin, cut it off. It is better for you to enter
life maimed than with two hands to go into hell, where the fire never goes
out. And if your foot causes you to sin, cut it off. It is better for you to
enter life crippled than to have two feet and be thrown into hel
e****i
发帖数: 2152
31
so God expelled them from the paradise.
This is where the original sin came from.
All christian men and women should be naked to repel the sin.
I know this is not easy.
Let's start it by going to church naked.
d**k
发帖数: 606
32
来自主题: FleaMarket版 - [求购]5 SIN<->SFO airtickets, any aireline
SIN->SFO: around 01/14/2012
SFO->SIN: around 02/04/2012
need 5 round trip tickets with max 1-stop. Please name your price including
all.
g******g
发帖数: 7
33
来自主题: NCAA版 - sin(x)+cos(x) = 3x -> x=?

试试:
原题 =》 sqrt(2)/3 * sin(x+pi/4) = x
做图, y=x, 和 y = sqrt(2)/3 * sin(x+pi/4)
得初始估计 x = 0.5, 然后迭代。
f*******g
发帖数: 3304
34
非常好 刚刚的。
可惜我不去SIN.
去年32.5K MILES 飞过一次 JFK - FRA - SIN - PVG A380 经济舱已经非常好了
c*******c
发帖数: 726
35
来自主题: Movie版 - 看了Sin City 2(有剧透)
Sin City 1里面最初的
I told her I love her~
PiuPiu~
I will cash my check tomorrow~
几句话一点背景音乐就定了整个片子的调,然后整三个故事都在表现一种善恶错位,人
性扭曲意念
Sin City 2里面一开始就没处理好,结果整个片子就乱了
m******d
发帖数: 177
36
来自主题: TrustInJesus版 - 我认为把sin翻译成“罪”,有点过了
你说的“过错”英文应该是sins(复数)或叫做trespass
而sin这个字讲的是人里面因堕落而有的犯罪的本性、源头。
x*********e
发帖数: 35
37
来自主题: TrustInJesus版 - Sin and death
Death is a result of sin inherited from the first man, Adam, who chose to
disobey God. The original sin was not sex relations but was the deliberate
disobedient act of eating of “the tree of the knowledge of good and bad.”
The dead are conscious of nothing. In the future, God through Jesus will
resurrect the dead.—Genesis 2:17; Ecclesiastes 9:5, 10; John 11:25; Romans
5:12.
S*********L
发帖数: 5785
38
来自主题: TrustInJesus版 - Sin and death
Sin caused death and Jesus saved us by paying for the sin and regenerating
our lives.
r******m
发帖数: 10
39
来自主题: TrustInJesus版 - 'We Have Sinned Against You' (zz) (转载)
【 以下文字转载自 Belief 讨论区 】
发信人: myelsa (我的理解不一定对), 信区: Belief
标 题: 'We Have Sinned Against You' (zz)
发信站: BBS 未名空间站 (Fri Jun 11 12:59:50 2010, 美东)
http://www.beliefnet.com/Faiths/Christianity/2004/11/We-Have-Si
A leading evangelical speaks at the Mormon Tabernacle and says evangelicals
have spread lies about LDS beliefs.
For the first time in 105 years, non-Mormons mounted the pulpit at the
Mormon Tabernacle in Salt Lake City on Nov. 14. The event, dubbed an "
Evening of Friendship," was organized ... 阅读全帖
R*o
发帖数: 3781
40
来自主题: TrustInJesus版 - Justification by Faith-->sinful Christian?
a saved christian shall not live in sin

thems
are
sin
th
b
Ca
We
m****a
发帖数: 9485
41
Because of the Fall of Adam and Eve, all people live in a fallen condition,
separated from God and subject to physical death.
However, we are not condemned by what many call the “original sin.” In
other words, we are not accountable for Adam's transgression in the Garden
of Eden.
The Prophet Joseph Smith said, “We believe that men will be punished for
their own sins, and not for Adam's transgression” (Articles of Faith 1:2)--
-我们信人为自己的罪受惩罚,并不为亚当的违诫。
x***e
发帖数: 844
42
CAPTIONBy Kyle Telechan, TheTimes, via AP
An Indiana sheriff's office is investigating alleged misconduct by the
pastor of an evangelical megachurch who was fired after admitting to an "
improper relationship" with a teenage girl, the Hammond Post-Tribune reports.
Jack Schaap, 54, was pastor at 15,000-congregation First Baptist Church of
Hammond, Ind., for 11 years and broadcast his sermons worldwide.
The church said in a news release that Schaap committed "a sin that has
caused him to forfeit h... 阅读全帖
y*****n
发帖数: 154
43
来自主题: Shanghai版 - original sin
发信人: yiyivan (聚散两依依), 信区: SJTU
标 题: original sin
发信站: The unknown SPACE (Sun Nov 11 16:19:43 2001) WWW-POST
后来又去看了orginal sin,不过情节太复杂,偶有点看不懂!
:(
不过大致上意思就是讲一英俊善良痴情的大富翁GG和通信好久
的一个网友MM见了面(网友一说是偶瞎说的,呵呵,但他俩事
先没见过面是肯定的!),GG一眼就爱上了这个貌若天仙看似
纯情的小MM,脑子一发昏就将自己的老底统统兜出,还给了MM
full accession to his bank account。
哈哈,没想到这下他中刀乐!
MM原来是受她那恶丈夫指使来冒充真正的那个网友MM的(真正
的那个已被谋杀),于是没过多久就将大富翁GG的金银细软一
卷而空,留了五十多块大洋让GG买肯得基的汉堡堡。这下GG呆
若木鸡,咬牙切齿地发誓要亲手杀了她不可,于是一路追杀……
终于在某个宴会上戏剧性地找到了MM,准备一枪把美人给毙了!
可是MM痛哭流涕悔恨不已,找出这样那样的理由……
sigh~~终究是英雄难过美人
T*******n
发帖数: 493
44
\usepackage{amsmath}
\DeclareMathOperator{\sin}{sin} % no super- or subscript limits
\DeclareMathOperator*{\lim}{lim} % will have limits
Using \DeclareMathOperator will ensure correct font and spacing.
e****d
发帖数: 333
45
来自主题: Mathematics版 - 解方程x=sin(x)
解析解方程:
x=A*sin(B*x+C). A,B,C已知。
结果最好能表示成 sin(n*C)的级数。不行也可以,给个近似的解,也行,但是就是要
解析。
请问怎么做?
多谢。
jl
发帖数: 398
46
如果basis是 square wave = sign ( sin or cos ) 替换 sin, cos, 是不是所有的 连续function 都可以有 类似的 Fourier Series 表示?
有什么定理吗 ? 多谢.
jl
发帖数: 398
47
跟 harr 小波还是不一样的. 我用的 square wave = sign ( sin or cos ).
不知道有没有什么定理 说 跟 sin, cos对应的 waveform 是Complete Orthogonal System?
A**H
发帖数: 4797
48
来自主题: Mathematics版 - 求助,这个sin三角函数的一个问题
天才谈不上,有点点数学天赋吧
早上,娃给我解释了他的公式。原来娃蹲马桶上是想怎么算出pi来。他从圆周长等于2.
pi.r着手的,然后把圆划成n变形,然后按照sin的定义,很快就可以从n趋于无穷得出
pi了。
然后,娃上网搜索了一番之后告诉我,他的那个公式可以更简单的写成sin(n),是阿
基米德搞出来的。。。
A**H
发帖数: 4797
49
来自主题: Mathematics版 - 求助,这个sin三角函数的一个问题
天才谈不上,有点点数学天赋吧
早上,娃给我解释了他的公式。原来娃蹲马桶上是想怎么算出pi来。他从圆周长等于2.
pi.r着手的,然后把圆划成n变形,然后按照sin的定义,很快就可以从n趋于无穷得出
pi了。
然后,娃上网搜索了一番之后告诉我,他的那个公式可以更简单的写成sin(n),是阿
基米德搞出来的。。。
s*******0
发帖数: 3
50
来自主题: NanoST版 - SiN Membrane
询问有人用过SiN Membrane做AFM和TEM吗?
本人用的时候为什么总是脏脏的。起先以为是sample比较脏,可是后来sample被洗了N
遍之后,滴到grid上还是脏脏的。。。郁闷了。
问问有没有高人指点一下,这个SiN grid也可以洗吗?就像洗Si基片一样?还是说就是
我的Sample的溶剂的问题。
谢谢!
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