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q********g
发帖数: 10694 | 2 Constant pH Simulation
First, check your assumptions. The ideal situation would be to have a
constant-pH algorithm to perform the MD simulations. However, conventional
explicit-solvent MD algorithms cannot do that, since they're constant-H+
algorithms. Furthermore, if you use a MM force field, you will never get
protonation/deprotonation of sites in your solute: free H+ will just wander
around, while titrable sites are stuck with their initial protonation states
; if you want to overcome this yo... 阅读全帖 |
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W*******n
发帖数: 4140 | 3 【The following file was given by me to some physicians, including Dr.
Robert S. April on my Nov. 08, 2019 visit. A very similar file was given to
a treating physician, Dr. Mehrdad Golzad. An earlier version was provided to
NYS Workers' Compensation Board and the WC insurance adjuster Ms. Lisa
White in June 2019. Almost nobody cares. Medical readers can understand why
the deniers want to wipe Neck off the established list of established injury
sites, because the Neck was seriously injured during ... 阅读全帖 |
|
W*******n
发帖数: 4140 | 4 【The following file was given by me to some physicians, including Dr.
Robert S. April on my Nov. 08, 2019 visit. A very similar file was given to
a treating physician, Dr. Mehrdad Golzad. An earlier version was provided to
NYS Workers' Compensation Board and the WC insurance adjuster Ms. Lisa
White in June 2019. Almost nobody cares. Medical readers can understand why
the deniers want to wipe Neck off the established list of established injury
sites, because the Neck was seriously injured during ... 阅读全帖 |
|
V*****n
发帖数: 893 | 5 Version 9.1 1
Riding the Paceline
Prologue
A pace line is a group of riders who trade off the lead to share the effort
of riding in front so that the other
riders can rest in the draft that is created. Some of the benefits of a
paceline are safety, efficiency, and
speed. Pacelines that lack discipline can be annoying and even dangerous.
Stage One - Basics
Group Interaction
Individual energy contributes to the group energy. How an individual
interacts with the group is important
and can have an i... 阅读全帖 |
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T*****n
发帖数: 2456 | 6 关于物理常数，不能说物理学家对physical constants是否真是常数没有信心，只能说
no evidence支持constant variation的假说。我觉得wiki上的这段话还是比较清楚的
，现在的实验可以给constant的变化设定一个upper bound：
Beginning with Paul Dirac in 1937, some scientists have speculated that
physical constants may actually decrease in proportion to the age of the
Universe. Scientific experiments have not yet pinpointed any definite
evidence that this is the case, although they have placed upper bounds on
the maximum possible relative change per year at very small amounts (ro... 阅读全帖 |
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j*****j
发帖数: 290 | 7 From http://www.swimsmooth.com/exhalation.html
Breathing Technique - Exhalation
you know your problem? you keep it all in!
Also see our related articles: Freestyle Breathing Overview and Tips and The
Power of Bilateral Breathing.
Important!
Don't forget to breathe. Doctors recommend it.
Very few novice swimmers exhale properly into the water.
Nearly all intermediate swimmers think they are exhaling correctly - at
least, that's what they say when we ask them. Do they? Very few do.
Even amongst... 阅读全帖 |
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z**********g
发帖数: 16 | 8 继续发表有关斥力子的文章，请指正。
“斥力子理论”对物理学的影响1
庄一龙
近年来，由中国学者创立的“斥力子理论”，经过中国科学院《科技促进发展》《
科技成果管理与研究》、《科技中国》、《中国科技财富》、《中国科技成果》等主流
科技杂志报导后，引起了学术界广泛重视。那么，这一理论究竟有那些观点震动了学术
界，值得人们如此关注呢？
“斥力子理论” 是一种新物质作用理论，实际上也是一种物理哲学理论。它的代
表性文章是《论“斥力子”的存在及其意义》，另外还包括《相对性效应和牛顿定律的
本质》、《物理学中精细结构常数的理论推导与解释》等几十篇论文。同牛顿的苹果从
树上掉下来的万有引力理论相对应，这是一个可称作“苹果如何转移到树上去的‘万有
斥力’理论”。该理论认为，地面的物体一旦动起来，不管方向如何，都具有一种挣脱
地球引力的能力，就好象物体吸收了一种对抗万有引力的物质那样。“斥力子理论”把
普朗克能量子看作是一种对抗引力的实物粒子，称它为“斥力子”，并认为物体运动状
态的改变就是由于吸收或释放斥力子造成的。
在思维方法上，它有两个根本突破：其一,是把抽象的能量概念实物化，使能量有
一个实物载... 阅读全帖 |
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z**********g
发帖数: 16 | 9 Repulsion Particle Hypothesis
: Zhuang Yilong
Shanghai Institute of Science & Technology Management
Jiading District of Shanghai, 201800, China
Abstract: The theory of “ Repulsion Particle Hypothesis” is a new theory
of matter interactions. In contrast to Newtons universal gravitation that
the apple drops from the tree, this hypothesis can be called the universal
repulsion theory tha... 阅读全帖 |
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w*********g
发帖数: 30882 | 10 高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发展的极限。目前虽然涌现出一些
新型航空发动机技术，但仍然没有走出依靠压力膨胀过程来实现热功转换的思路。他强
调，人们应该另辟蹊径，寻找其他可用的工作原理。为此，他研究了自然界龙卷风的形
成与强化机制，发明了一项称为"余热增推"的技术，直接利用龙卷旋涡实现热功转换并
提取... 阅读全帖 |
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N*V
发帖数: 350 | 11 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
f*****g
发帖数: 9098 | 12 【 以下文字转载自 Dreamer 讨论区 】
发信人: falling (旋转坠落), 信区: Dreamer
标 题: 推荐一篇文章
发信站: BBS 未名空间站 (Mon Jan 16 00:48:35 2012, 美东)
http://geniustypes.com/signs_of_insecurity/
Signs of Insecurity by Brian Lee
One of the greatest challenges we face in our lifetimes is becoming
comfortable in our own skin. A person who is secure with himself is much
more likely to achieve success, have meaningful relationships, and be
respected by others.
A person who is insecure finds difficulty in many aspects of life. Since
mo... 阅读全帖 |
|
m**d
发帖数: 21441 | 13 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
C********g
发帖数: 9656 | 14 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
m****v
发帖数: 84 | 15
well, actually i mean, if the extra space (other than input) this
algorithm uses is constant (like O(10)), then the space complexity is
constant; if extra space not constant (like O(N^2)), then complexity not
constant.
i don't think this means 'constant means extra space' or 'there cannot be
any constant space algorithm...' as you said, :)
well, i guess you might mean we have to (at least) read all elements from
input in O(n). but merely doing this will not 'use' the input as space (in
which we... 阅读全帖 |
|
c********y
发帖数: 6 | 16 是CONSTANTLY一生中最"黑"的一天,这一天,CONSTANTLY尝尽了孤寂和落莫,发现世界上真
正在痛苦中可以陪伴自己的人只有自己.于是,这一天,CONSTANLY第一次大方的请自己看了
一场电影,一部想了很久也等了很久的电影.电影很短,只有87分钟,电影结束后,CONSTANTL
Y第一次没有偷机取巧的多看一部,而是大方的走出了电影院.在电影院的角落,CONSTANTLY
坐在侧门的台阶上抽烟,看着结伴而来的人们,CONSTANTLY哭了..因为CONSTANTLY在最需要
朋友的时候身边却自有自己孤独的身影.CONSTANTLY知道每个人都会有这么一天,但这是CO
NSTANTLY的这一天,所以有并要把它记录在卫堡.因为CONSTANLY想要记住这一天,记住为什
么会有这一天,记住对有的人一时的心软就是对自己永远的伤害. |
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G*******s
发帖数: 4956 | 17 Blinded By Tradition:
An Open Letter to Dave Hunt
Regarding His Newly Published Attack Upon the Reformation, What Love Is This
? Calvinism's Misrepresentation of God
James White
Updated 5/16/02, see bottom of file
Dear Dave,
In the period of time since I finally received my own copy of your book (you
may recall I scanned through it while standing at your table in St. Louis a
t the PFO Conference) I have gone through a number of different emotions. A
t first I was just going to do one Dividing ... 阅读全帖 |
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w*********r
发帖数: 2192 | 18 赛斯名言精选
文：赛斯 来源：新时代网 时间：2005-1-30 13:45:28 点击：541
001.Conciousness is Like a Flower with many Petals.
--Seth's first message to this world. Seth, "Seth Material".
意识就象一朵有着许多花瓣的花朵。——赛斯带给这个世界的第一个讯息
002.I come here because it is fun. I have fun when I come here. I do not
come here because I feel that I have any great responsibility for your
beings or welfare. Who am I to set myself against the innate wisdom of your
own individual being, or to take upon my invisible shoulders the great
privileg... 阅读全帖 |
|
w*********r
发帖数: 2192 | 19 赛斯名言精选
文：赛斯 来源：新时代网 时间：2005-1-30 13:45:28 点击：541
001.Conciousness is Like a Flower with many Petals.
--Seth's first message to this world. Seth, "Seth Material".
意识就象一朵有着许多花瓣的花朵。——赛斯带给这个世界的第一个讯息
002.I come here because it is fun. I have fun when I come here. I do not
come here because I feel that I have any great responsibility for your
beings or welfare. Who am I to set myself against the innate wisdom of your
own individual being, or to take upon my invisible shoulders the great
privileg... 阅读全帖 |
|
l******i
发帖数: 1404 | 20 kinecty and mathquant are correct,
here is my detailed solution:
Notice that $ df'/df = df'/dt \times dt/df = f"/f' $;
Taking it back to the problem, we have: $ f/f' = df/df' $,
i.e. $ df'/f'=df/f $;
Integrating on both sides, then we get:
$ \log(|f'|) = \log(|f|) + C_1 $ for some constant C_1;
Taking exponential on both sides, then we get:
$ |f'| = C_2 \times |f| $ for some constant C_2>0;
Now $ |f'/f| = C_2 $ with C_2>0,
i.e. $ f'/f = C_3 $ with some constant C_3.
Integrating on both sides, th... 阅读全帖 |
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s********l
发帖数: 245 | 21 Here is the code:
option symbolgen mprint mlogic;
%macro parametric(original=, dsn=, marker1=, marker3=, upper=, lower=,
constant=);
data &dsn;
set &original;
%let constrain1 =%sysevalf(abs(%str(&marker1 - &constant)));
%let constrain2 =%sysevalf(abs(%str(&marker3 - &constant)));
%if &marker1 NE &constant and &marker3 NE &constant %then %do;
&upper=abs(&marker1-&marker3);
&lower=abs(&marker1-&marker3);
%end;
%if &marker1 NE &constant |
|
C****2
发帖数: 2904 | 22 美国国债20万亿，利率到3%，利息一年6000亿，关键是有人接手，要没人接呢？有人估
计要一万亿了，还有各种军事加大花费，修墙，还有公司大减税，美国不到两年破产。
How High Can Interest Rates Go Before National Debt Is Unsustainable?
t is a question we are all asking ourselves as the national debt approaches
$20 trillion with Donald Trump about to occupy the White House and planning
a $1 trillion infrastructure program.
Interest rates are climbing all across the yield curve having just been
exacerbated by Thursday's overnight funds rate hike by the Federal Reserve
Board. How ... 阅读全帖 |
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m**c
发帖数: 7349 | 23 So it basically stipulates that entropy is proportional to spacetime
boundary with the coefficient relating to certain constants. Why just put it
as:
S=cK.
: The formula
: S = entropy (a thermodynamic quantity representing the unavailability
of a
: system’s thermal energy for conversion into mechanical work)
: h = Planck constant (the energy of a quantum of electromagnetic
radiation
: divided by its frequency)
: G = Newton’s constant (universal gravitational constant)
阅读全帖 |
|
发帖数: 1 | 24 【 以下文字转载自 BetterStock 俱乐部 】
发信人: drugbull (药牛), 信区: BetterStock
标 题: 既然散户不能做空，那么我们就要知道，大空头何时才会入场？
发信站: BBS 未名空间站 (Sat Jun 2 00:48:06 2018, 美东)
1，债券殖利率倒挂（纠缠或者收敛到同一点）
30-year treasury constant maturity rate
20-year treasury constant maturity rate
10-year treasury constant maturity rate
5-year treasury constant maturity rate
1-year treasury constant maturity rate
2， 初领失业救济金人数持续下降，代表经济很景气，大盘会继续
续领失业救济金人数持续下降，代表经济很景气，大盘会继续 |
|
发帖数: 1 | 25 和真实世界的黑洞有所不同
https://www.quantamagazine.org/the-double-life-of-black-holes-20190129/
String theorists moreover like to study black holes in universes with a
negative cosmological constant (the so-called Anti-de Sitter spaces). Our
actual universe has a positive cosmological constant. But if the
cosmological constant is negative, black hole horizons can be infinitely
extended planes. In addition to higher dimensions and a negative
cosmological constant, theoreticians also prefer black holes that ... 阅读全帖 |
|
z**x
发帖数: 3629 | 26 http://blogs.youwheel.com/2015/03/31/acura-sh-awd-comprehensive
Acura SH-AWD: A Comprehensive Analysis
Written By Editor on 2015-03-31, Posted in Car Chat, Technical Talk | 2
comments
The Acura SH-AWD system (short for: Super Handling-All Wheel Drive) is often
described ambiguously in most automobile literature. Some articles even
said it is an enhanced version of the Honda VTM-4, which is incorrect.
2012_Acura_TL_Rear
In this article, we will analyze the SH-AWD in detail, focusing on these
thre... 阅读全帖 |
|
y*********e
发帖数: 518 | 27 Let's say we don't use a single array for storage. Instead, we use a list of
arrays.
Let each storage array to be size of M, which is a constant.
To access the Kth element, we can know in which storage array and in which
position in that array the element is located.
Accessing array is constant. If we can indexing the storage arrays and find
which one it is located in a constant time, then everything could be done in
constant time.
That would be simple. Maintain an array that stores the pointer ... 阅读全帖 |
|
S***l
发帖数: 320 | 28 Pete Constant, retired police officer and union board member, argues for
pension reform
By JONDI GUMZ - Santa Cruz Sentinelsantacruzsentinel.com
Posted: 04/20/2012 08:38:32 PM PDT
April 21, 2012 3:43 AM GMTUpdated: 04/20/2012 08:41:31 PM PDT
SANTA CRUZ - San Jose City Councilman Pete Constant, a Republican, retired
police officer and union board member, came to Santa Cruz on Friday at the
invitation of the California Senior Alliance to explain why he's pushing
pension reform.
The Cocoanut Gr... 阅读全帖 |
|
a*f
发帖数: 5682 | 29 我几年前第一次看到这张照片的时候也有类似的问题。好在我是在Sally Eauclaire写
的‘The New Color Photography’书里看到的。
她在书里有比较的介绍。我就扫描一下供大家看看
Of the principal color photographic formalists, Stephen
Shore has most successfully adapted Evans’s objectivity
and aesthetic autonomy. Yet unlike Evans, who so ably
absorbed the significance and sensuousness of his sub.
jects, recognizing the potent ambiguities in the real, Shore
avoids mythic possibilities for purely pictorial meaning.
Whether photographing deserted intersections, dirt roads... 阅读全帖 |
|
G******U
发帖数: 4211 | 30 Bill Zeller
I have the urge to declare my sanity and justify my actions, but I assume I'
ll never be able to convince anyone that this was the right decision. Maybe
it's true that anyone who does this is insane by definition, but I can at
least explain my reasoning. I considered not writing any of this because of
how personal it is, but I like tying up loose ends and don't want people to
wonder why I did this. Since I've never spoken to anyone about what happened
to me, people would likely draw ... 阅读全帖 |
|
A**n
发帖数: 1703 | 31 遗书：
Bill Zeller
I have the urge to declare my sanity and justify my actions, but I assume I'll never be able to convince
anyone that this was the right decision. Maybe it's true that anyone who does this is insane by definition,
but I can at least explain my reasoning. I considered not writing any of this because of how personal it is,
but I like tying up loose ends and don't want people to wonder why I did this. Since I've never spoken to
anyone about what happened to me, people would likely dr... 阅读全帖 |
|
e***b
发帖数: 53 | 32 <<
way), you still couldn't figure out that question by yourself.>>>
You tell me where the constant current come from!
<<
maintains a constant voltage between terminal 1 and 2.>>>
lm113 is a constant voltage diode? what are you talking bout? LM113 is a bandgap reference, it is NOT just a diode. There is no such kind of stuff called constant voltage diode. |
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f*****0
发帖数: 489 | 33 let me just answer one of your questions and then you will get a flavor of
how far off you are:
"3. 如果我们有一个constant current source, 那它肯定不应该随温度，power
source 变化而变化，对吧。总之，就应该总是constant, 对吧？"
what is "constant" is relative. a typical constant current source for
examples uses a series of diodes or zener or a LED to drop a "constant"
voltage off a resistor, in a fashion very similar to the widlar bandgap
topology.
in such a design, you consider the forward voltage off the diodes / zener /
led to be co |
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n******h
发帖数: 2544 | 34 I read his question again. The systems use a constant current source. Well,
first I guess he meant constant amplitude AC current source, DC constant
source won't have practical meaning in transformer.
The system loss definitely goes higher. But if the question is about the
loss in primary coil:
If current flows into primary coil is constant, then the loss in it should
be constant, at first order. It is I^2*Rp. This assumes frequency is not too
high and every component is still in their comfortab... 阅读全帖 |
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t**********m
发帖数: 205 | 35 Quantum Gravity Based on Mach Principle and Its Solar Application
http://vixra.org/abs/1101.0076
The starting point of quantum mechanics is the classical algebraic formula
connecting energy to momentum: energy is proportional to the squared
momentum. As a result, energy and momentum do not be treated equally. The
wave equation of quantum mechanics (a differential equation) results from
the replacement of the classical energy quantity with the derivative with
time and the replacement of the momen... 阅读全帖 |
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z**********g
发帖数: 16 | 36 前言：中国大陆的庄一龙先生独创了斥力子理论，可以用来解释爱因斯坦未能解释的疑
难问题，目前已经得到国内科学界某些人的关注，有兴趣的科学界人士可以了解一下斥
力子的基本理论。
我是庄一龙的朋友，目前暂时在美国居住，受其委托，在本站发表他的文章，因为未名
网站在国内是被屏蔽的。
如果想进一步了解该理论，请在网上留言，我会和您联系的。
下面我把对这个理论的大致介绍发表在这里。
2010年12月)中国科学院《科技促进发展》杂志文章：
斥力子理论
撰文 张宇
上海科技管理干部学院庄一龙副教授所创立的“斥力子理论”是一种物理哲学理论，该
理论认为，地面的物体一旦动起来，不管方向如何，都具有一种挣脱地球引力的能力，
就好象物体吸收了一种对抗万有引力的物质。
该理论把普朗克能量子看作是一种具有对抗万有引力能力的实物粒子，称它为“斥力子
”，并认为物体运动状态的改变，就是由于吸收或释放斥力子造成的，作用力的过程是
实实在在的物质转移过程，通过斥力子的转移，斥力子所具有的质量、能量、动量就会
叠加到速度增加的物体上去，造成运动物体的相对性效应。反引力实物能量粒子的引入
，打破了物理学理论的“引力论”框架，... 阅读全帖 |
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M****i
发帖数: 58 | 37 If I am not missing somthing here, the sufficiency is not correct. For
example, choose the function sigma(y,t) to be the constant 1, then clearly
we have sigma(X,t) is deterministic (identically 1). But the corresponding
SDE becomes dX(t)=dW(t), so that the solution is X(t)=X(0)+W(t), whose
quadratic variation [X](t)=t, this is not a constant.
Maybe the question should be changed into:
If dX(t)=sigma(X(t),t)dW(t), then the following are equivalent:
1)the quadratic variation of X is a constant;
2... 阅读全帖 |
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y*****w
发帖数: 1350 | 38 就是如何写iterations。比如我需要得到如下function的运算结果：
f(x) = p*f(x-1), x>=1, p=constant
到最下面时比如x=1, 则f()有固定的distribution或者直接f(0)=constant。
如果我直接在R中输入如上f(x) = p*f(x-1)运行，R会告诉我“could not find
function f”。
～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～
～～～～～～～
上面是一个parameter的情况。如果我有两个parameters，比如下面这个recursive
function，应该如何表达呢？是不是必须用到matrix？
f(s,d) = p*f(s-1,d) + q*f(s,d-1), s>=0, d>=0, p=constant, q=constant, f(0,0)
=constant |
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e****i
发帖数: 2152 | 39 【 以下文字转载自 Military 讨论区 】
发信人: erkuai (三天不上bbs,赶得上刘少奇), 信区: Military
标 题: On the Jews and Their Lies, 1543
发信站: BBS 未名空间站 (Wed Jan 12 23:21:23 2011, 美东)
by Martin Luther (1483-1546)
Translated by Martin H. Bertram
copyright © 1971 Fortress Press & Augsburg Fortress - On the Jews and
Their Lies is from Luther’s Works Volume 47. Augsburg Fortress is the
publishing ministry of the Evangelical Lutheran Church in America.
Funded through sales revenue, Augsburg Fortress is called to provide
produ... 阅读全帖 |
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e****i
发帖数: 2152 | 40 by Martin Luther (1483-1546)
Translated by Martin H. Bertram
copyright © 1971 Fortress Press & Augsburg Fortress - On the Jews and
Their Lies is from Luther’s Works Volume 47. Augsburg Fortress is the
publishing ministry of the Evangelical Lutheran Church in America.
Funded through sales revenue, Augsburg Fortress is called to provide
products and services that communicate the Gospel, enhance faith, and
enrich the life of the Christian community from a Lutheran perspective.
Part I
I had mad... 阅读全帖 |
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H****g
发帖数: 14447 | 41 1. 证实了毛泽东1975年写给周恩来这首诗。
《江山靠谁守·诉衷情》
当年忠贞为国筹，
何曾怕断头？
如今天下红遍，
江山靠谁守？
业未竟，
身躯倦，
鬓已秋。
你我之辈，
忍将夙愿，
付与东流？
2. 证实了1976年之前根本没有所谓饿死三千万或者大饥荒之说。
3. 毛泽东1975年的担心，或者说1964年的担心，都变成了现实。
4. 毛泽东唯一的遗产就是留给人民的造反精神，终将成燎原之火。
Mao Tse-Tung: Father of Chinese Revolution
By Fox Butterfield
Special to The New York Times
HONG KONG, Sept. 9--Mao Tse-tung, who began as an obscure peasant, died one
of history's great revolutionary figures.
Born at a time when China was wracked by civil strife, beset with terrible
poverty and enc... 阅读全帖 |
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b***y
发帖数: 14281 | 42 既然有人争论方的学术水平，就上网搜了一下。应该说这个水平对于一个junior
faculty来说可以算是很牛B了，但是对于老方这种senior的已经搞了一辈子的人来说，
就只能算so so。不要说是院士，离aps fellow的级别也还差了不少。引用率最高的一
篇文章还是95年到了arizona之后跟老外合作的，被引118次，这也是方唯一一篇被引用
上百次的文章。可见方励之89之前确实没有做出过什么重要的工作，他的名声和地位绝
对是靠政治得来的，当然其中部分的也是80年在中国搞科普所得，必须承认科普工作也是
有重要的社会意义的。
(BTW，有人说你这个搜索未必完整。不错，确实不能保证100％毫无遗漏。但是我
用的search engine is THE search engine everybody in this community uses today.
So, if any article is not found by this search engine, sadly, it simply doesn't matter,
because no one would ever n... 阅读全帖 |
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w********e
发帖数: 8594 | 43 分数不能代表能力。GDP不能代表国力。但是我们还是来看看数据，作为参考吧。当然
，功劳不一定是温家宝的。
Indicator Name 2002
GDP (current US$) 1.45E+12
GDP (constant 2005 US$) 1.67E+12
GDP, PPP (constant 2005 international $) 3.98E+12
Indicator Name 2012
GDP (current US$) 8.23E+12
GDP (constant 2005 US$) 4.52E+12
GDP, PPP (... 阅读全帖 |
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k*****r
发帖数: 21039 | 44 What is it Like to Teach Black Students?
by Christopher Jackson
Until recently I taught at a predominantly black high school in a
southeastern state. The mainstream press gives a hint of what conditions are
like in black schools, but only a hint. Expressions journalists use like “
chaotic” or “poor learning environment” or “lack of discipline” do not
capture what really happens. There is nothing like the day-to-day experience
of teaching black children and that is what I will try to ... 阅读全帖 |
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w*********g
发帖数: 30882 | 45 黑人学校和黑人世界的真相 - Chris Jackson
发信站: BBS 未名空间站 (Mon Dec 21 22:28:09 2015, 美东)
What is it Like to Teach Black Students?
by Christopher Jackson
Until recently I taught at a predominantly black high school in a
southeastern state. The mainstream press gives a hint of what conditions
are
like in black schools, but only a hint. Expressions journalists use like “
chaotic” or “poor learning environment” or “lack of discipline” do not
capture what really happens. There is nothing like the da... 阅读全帖 |
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s*****r
发帖数: 11545 | 46 Scientists discover new form of light
DUBLIN, Ireland, May 17 (UPI) -- Researchers in Ireland have discovered a
new form of light. Their discovery is expected to reshape scientists'
understanding of light's basic nature.
Angular momentum describes the rotation of a light beam around its axis.
Until now, researchers believed the angular momentum was always a multiple
of Planck's constant -- a constant ratio that describes the relationship
between photon energy and frequency, and also sets the sca... 阅读全帖 |
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发帖数: 1 | 47 The formula
S = entropy (a thermodynamic quantity representing the unavailability of a
system’s thermal energy for conversion into mechanical work)
h = Planck constant (the energy of a quantum of electromagnetic radiation
divided by its frequency)
G = Newton’s constant (universal gravitational constant)
A = area of event horizon (a boundary in spacetime beyond which events
cannot affect an outside observer)
c = speed of light
k = Boltzmann’s constant (relates the average kinetic energy of partic... 阅读全帖 |
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发帖数: 1 | 48 The formula
S = entropy (a thermodynamic quantity representing the unavailability of a
system’s thermal energy for conversion into mechanical work)
h = Planck constant (the energy of a quantum of electromagnetic radiation
divided by its frequency)
G = Newton’s constant (universal gravitational constant)
A = area of event horizon (a boundary in spacetime beyond which events
cannot affect an outside observer)
c = speed of light
k = Boltzmann’s constant (relates the average kinetic energy of partic... 阅读全帖 |
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