f**d
发帖数: 768 | 1 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
|
g*****h
发帖数: 15 | 2 College Algebra by Larson & Hostetler
DVDRip | MKV / AVC 692 Kbps | 720х544 | 29.97 fps | MP3 128 kbps | 8.75 GB
Language: English
Lecture Titles:
Prerequisites
P-1 Review of Real Numbers and Their Properties
P-2 Exponents and Radicals
P-3 Polynomials and Special Products
P-4 Factoring
P-5 Rational Expressions
P-6 Errors and the Algebra of Calculus
P-7 Graphical Representations of Data
Chapter 1 – Equations and Inequalities
1-1 Graphs of Equations
1-2 Linear Equations in in One Variable
1-3 Mode... 阅读全帖 |
|
g****g
发帖数: 1828 | 3 In probability theory, the normal (or Gaussian) distribution, is a
continuous probability distribution that is often used as a first
approximation to describe real-valued random variables that tend to cluster
around a single mean value. The graph of the associated probability density
function is “bell”-shaped, and is known as the Gaussian function or bell
curve:[nb 1]
f(x) = \tfrac{1}{\sqrt{2\pi\sigma^2}}\; e^{ -\frac{(x-\mu)^2}{2\sigma^2}
},
where parameter μ is the mean (location of the pe... 阅读全帖 |
|
g*****h
发帖数: 15 | 4 College Algebra by Larson & Hostetler
DVDRip | MKV / AVC 692 Kbps | 720х544 | 29.97 fps | MP3 128 kbps | 8.75 GB
Language: English
Lecture Titles:
Prerequisites
P-1 Review of Real Numbers and Their Properties
P-2 Exponents and Radicals
P-3 Polynomials and Special Products
P-4 Factoring
P-5 Rational Expressions
P-6 Errors and the Algebra of Calculus
P-7 Graphical Representations of Data
Chapter 1 – Equations and Inequalities
1-1 Graphs of Equations
1-2 Linear Equations in in One Variable
1-3 Mode... 阅读全帖 |
|
发帖数: 1 | 5 数学里的 e 到底有多自然？—— e 的前世今生
e有时被称为自然常数（Natural constant），是一个约等于2.71828182845904523536
……的无理数。
以e为底的对数称为自然对数（Natural logarithm），数学中使用自然（Natural）这
个词的还有自然数（Natural number）。这里的“自然”并不是现代人所习惯的“大自
然”，而是有点儿“天然存在，非人为”的意思。就像我们把食品分为天然食品和加工
食品，天然食品就是未经人为处理的食品。
但这样解读“自然”这个词太浅薄了！为了还原全貌，必须穿越到2500多年前的古希腊
时代。
（你也知道，穿越剧都很长(>﹏<)，不喜欢长篇大论的，可直接跳到后面看结论。）
“自然”的发明
我们知道，人类历史上曾出现过很多辉煌的文明，例如大家熟知的四大文明：古巴比伦
、古埃及、古印度河以及古代中国。
但是要说谁对现代文明的影响最大？对不起，四大文明谁都排不上！真正对现代文明影
响最大的是古希腊文明，特别是古希腊的哲学、科学思想，是整个现代文明的源头和基
石。这里并不是要贬低四大文明，现代文明也从各文明继承... 阅读全帖 |
|
a*********3
发帖数: 660 | 6 定义 definition变量 variable面积 area直径 diameter半径 radius公式 formula
单价 unit price范围 range/scope/extent集合 set法则 principle本金 principal利
率 interest rate利息 interest单利 simple interest复利 compound interest正数
positive number负数 negative number解析式 analytic expression分类讨论
classified discussion性质 nature （不是很确定）奇函数 odd function偶函数
even function对称 symmetric坐标原点 origin单调性 monotonicity（不是很确定）
任意 random周期性 periodic 有界性 boundedness 数学 mathematics, maths(BrE)
, math(AmE) 公理 axiom 定理 theorem 计算 calculation 运算 operat... 阅读全帖 |
|
s***e
发帖数: 793 | 7 The complexity of an elementary function is equivalent to that of its
inverse, since all elementary functions are analytic and hence invertible by
means of Newton's method.
The computational complexity of computing the natural logarithm (using the
arithmetic-geometric mean) is O(M(n) ln n). Here n is the number of digits
of precision at which the natural logarithm is to be evaluated and M(n) is
the computational complexity of multiplying two n-digit numbers.
http://en.wikipedia.org/wiki/Natural_ |
|
a***e
发帖数: 413 | 8 wiki上对random tree的定义都有好几种，从没看到过的光是要理解题意也得花不少时
间吧？
http://en.wikipedia.org/wiki/Random_binary_tree
Uniformly random binary trees[edit]
The number of binary trees with n nodes is a Catalan number: for n = 1, 2, 3
, ... these numbers of trees are
1, 2, 5, 14, 42, 132, 429, 1430, 4862, 16796, … (sequence A000108 in OEIS).
Thus, if one of these trees is selected uniformly at random, its probability
is the reciprocal of a Catalan number. Trees in this model have expected
depth proportional to the squa... 阅读全帖 |
|
y***u
发帖数: 5243 | 9 1 richter magnitude差10倍，是用log10来做衡量的
The Richter magnitude scale, also known as the local magnitude (ML) scale,
assigns a single number to quantify the amount of seismic energy released by
an earthquake. It is a base-10 logarithmic scale obtained by calculating
the logarithm of the combined horizontal amplitude of the largest
displacement from zero on a Wood–Anderson torsion seismometer output. So,
for example, an earthquake that measures 5.0 on the Richter scale has a
shaking amplitude 10 tim |
|
s**********d
发帖数: 36899 | 10 文盲？
ISO the International Organization for Standardization
标准80000 Quantities and units （The system of quantities, including the
relations among the quantities used as the basis of the units of the SI, is
named the International System of Quantities, denoted ISQ, in all languages）
第二部 Mathematical signs and symbols to be used in the natural sciences and
technology
第12条 Exponential and logarithmic functions
还搞笑的英语单词才得到推广，看看数学符号有多少是英语单词？
你怎么不把log写成logarithmic呢？ |
|
v*****r
发帖数: 1119 | 11 Don't get confused.
Log2(N) is the best case of height value for a N node self-balancing b-tree.
Logb(N) is the best case of height value for a N node regular b-tree with
each node containing b number of elements.
For search/insert/delete efficiency of any b-tree in O notation, it is O(log
N). For algorithm with logarithm efficiency, logarithm base doesn't matter.
index
sense, |
|
l**********n
发帖数: 240 | 12 WikiAnswers - What is the value of log 0
Math question: What is the value of log 0? log 0 is undefined, because no
power can give a result of zero.
the following is from:http://in.answers.yahoo.com/question/index?qid=20060906222211AAGpBhf
Best Answer - Chosen by Voters
Go back to the definition of a logarithm. It's the power that you raise a
base to, in order to get the number you want.
10^3 = 1000, so log of 1000 = 3. (That's using base 10 logarithms, of course
).
Now examine what happens as yo |
|
g*****g
发帖数: 45 | 13 If I have obtained some experiemtal data y_i(x), i=1, 2,...n from different
trial.and have calculated the average value and the standard deviation,
say y(x)=y_avg(x)+/-SD(x).
Now Iconvert y_avg(x) from linear domain to logarithmic domain,
y_avg_log(x)=log[y_avg(x)], how should I estimate my SD in logarithmic
domain?
May I use error propagation formular?
Thanks! |
|
g*****z
发帖数: 333 | 14 Just found that the constant 18 is actually related to the sample size (# of
points in the data set) logarithmically. The formula that will work for all
sample size is:
(mean - min)(max - mean)/(1.624 * log(sample size))
where log() is a natural logarithm function.
Any suggestions on why it would be like this? Or is there a better way of
doing this?
Thanks a lot! |
|
h**********c
发帖数: 4120 | 15 我老来得瑟一把再
the logarithm of x to the base ten plus （es or not？）the logarithm of y to
the base ten。 |
|
L*m
发帖数: 235 | 16 近十年JAMS上的华人作者，JAMS上的文章相对更多，搜的没那么仔细，有可能不完全。
大家也看看有没有漏的
2015
Kähler-Einstein metrics on Fano manifolds. I: Approximation of metrics
with cone singularities
Xiuxiong Chen, Simon Donaldson and Song Sun.
Kähler-Einstein metrics on Fano manifolds. II: Limits with cone angle
less than 2π
Xiuxiong Chen, Simon Donaldson and Song Sun.
Kähler-Einstein metrics on Fano manifolds. III: Limits as cone angle
approaches 2π and completion of the main proof
Xiuxiong Chen, Simon Donaldson... 阅读全帖 |
|
M****i
发帖数: 58 | 17 For this question, the simplest method that I can find is to use a
representation theorem of continuous local martingale and the theorem of
iterated logarithm of Brownian motion. An advantage of this method is that
c(t) can be allowed to be stochastic. More precisely,
Let c(t) be a stochastic process and we write
f(t)=\int_0^t c(s)^2 exp(2*\int_0^s c(r)dr) ds,
g(t)=exp(-\int_0^t c(r)dr).
Assume that
i)f(t)<\infty, a.s. for every t>=0;
ii)f(t) tends to infinity when t tends to infinity.
iii)g(t)*... 阅读全帖 |
|
D**g
发帖数: 739 | 18 陈老师是会SAS的吧？PROC MCMC里有个例子，你何不用你的理论，给大家演示一下具体
算法，最后看看你的算法和结果和贝叶斯结果，frequentist算法有何区别。
Example 52.6 Change Point Models
Consider the data set from Bacon and Watts (1971), where is the logarithm of
the height of the stagnant surface layer and the covariate is the logarithm
of the flow rate of water. The following statements create the data set:
title 'Change Point Model';
data stagnant;
input y x @@;
ind = _n_;
datalines;
1.12 -1.39 1.12 -1.39 0.99 -1.08 1.03 -... 阅读全帖 |
|
f****r
发帖数: 5118 | 19 懂信号处理的帮忙分析一下 Wow Signal，俺以前懂，现在虾米了
这个东西说不定正往地球飞过来呢
http://en.wikipedia.org/wiki/Wow!_signal
The Wow! signal was a strong narrowband radio signal detected by Dr. Jerry R
. Ehman on August 15, 1977, while working on a SETI project at The Big Ear
radio telescope of The Ohio State University.[1] The signal bore expected
hallmarks of potential non-terrestrial and non-solar system origin. It
lasted for the full 72 second duration that Big Ear observed it, but has
not been detected again. Much attenti... 阅读全帖 |
|
c**i
发帖数: 6973 | 20 Edward Rothstein, Masters of Math, From Old Babylon; A precursor to the
theoretical flowering of Greek math. New York Times, Nov. 27, 2010.
http://www.nytimes.com/2010/11/27/arts/design/27tablets.html?_r=1&scp=3&sq=cuneiform&st=cse
Note:
(a) Pythagoras (c. 570- c. 495 BC)
Wikipedia
(b) The report states, "But Neugebauer, and then his many students and
rivals, also showed how sophisticated Babylonian mathematics was and how
many similarities existed to later Western systems ?if, that is, you coun... 阅读全帖 |
|
s*****V
发帖数: 21731 | 21 在国内工作一年多，接触了许多中学生，大学生和研究生。为了吸引优秀的学生到数学
中来，我与他们有了许多的对话与交流，这引发了我对数学教育从各方面的思考。迄今
已有许多文章对我们的教育体制提出批评，认为它扼杀了学生们的想象力。但我觉得我
们的教育从中学起就过分强调技巧，根本没有开拓学生的知识面才是根本的弊病。见多
才能识广，而没有宽广的知识面，想象力就是无源之水。在中学里，以奥数为甚的题海
战术使学生忘记了做题的目的是为了理解知识。在大学里，有些老师的知识就过于陈旧
和狭窄，将学生引入死胡同，更不可能拓宽学生的知识面了。我觉得对数学专业的学生
而言，要首先拓宽眼界，不仅在数学里的各个学科之间，更包括物理等相关学科。种种
感想促成了这篇文章，希望我自身的经历与体会能起到抛砖引玉的作用。
我将结合自己的治学经验讨论一下知识的重要性以及知识，技巧与想象力的关系。从我
读研究生开始，我的工作就一直围绕着物理学中出现的几何与拓扑问题。物理学家需要
数学作为工具，反过来他们又借助物理理论提出数学上的猜想，虽然物理学家的推导很
多时候是不严格的，但是这些猜想往往最后都被证明是正确的。这是非常令人感到惊奇... 阅读全帖 |
|
T*********r
发帖数: 11175 | 22 靠。。。看到这句话，突然想对数是啥
怎么想也没想起来
然后google了一下，原来是logarithm |
|
t**8
发帖数: 4527 | 23 杨28 唯一排上名的是活着的有名物理学家19 ， 在李政道之后，
其他的连前 50 名都排不上
Greatest physicist everThis is a featured page
In intellectual rankings, greatest physicist ever is an epitaph given to a
person, depending on ranking methodology, some rankings of which are listed
below, that classify, list, or describe someone as being the greatest
thinker in the field of physics of all time.
One of the more dominant surveys was the recent millennium poll on the
greatest physicist of all time, conducted by the British journal Phy... 阅读全帖 |
|
发帖数: 1 | 24 一个加州理工毕业的说（引用他的话，是用来驳斥的。在没有RaTG13之前，他说的其实
有理。）
“
I performed BLASTn and Clustal alignment on the Wuhan coronavirus and cross-
annotated missing CDS regions. I found that Bat SARS-like CoVZXC21 and Bat
SARS-like CoVZC45 are the most similar coronaviruses. The sequences are
different at quite a few silent point mutations but sufficiently close (95-
93%) to indicate a lineage that has not diverged significantly- this is a
recent strain with a close common ancestor. Some regions don’t even have
sile... 阅读全帖 |
|
发帖数: 1 | 25 Puma2019 发于 2020-01-29 08:58, 论坛:
标 题: 跟一个朋友聊了会，这次武汉病毒不像合成的。
quote 如下：
I performed BLASTn and Clustal alignment on the Wuhan coronavirus and cross-
annotated missing CDS regions. I found that Bat SARS-like CoVZXC21 and Bat
SARS-like CoVZC45 are the most similar coronaviruses. The sequences are
different at quite a few silent point mutations but sufficiently close (95-
93%) to indicate a lineage that has not diverged significantly- this is a
recent strain with a close common ancestor. Some region... 阅读全帖 |
|
l****z
发帖数: 29846 | 26 Obama’s Legacy: 5 Million Increase in Households Where No One Works
Posted by mishgea | March 6, 2016 1:45:48 | Economics
Promises Honored
Obama promised to do something about rising income inequality. He did. He
made matters worse.
Income inequality is up by three different measures, and there is a huge
five million jump in households in which no one works at all.
His policies prove that transfer payments reduce incentives to work and
lower incomes. Yet, Hillary Clinton and Bernie Sanders pr... 阅读全帖 |
|
s********t
发帖数: 4150 | 27 这有啥奇怪的？俺的学生里面理解logarithm的不超过十分之一。
Email
案。 |
|
m**n
发帖数: 9010 | 28 logarithm 和简单的等式加减乘除的变化, 还是相差很大的吧. |
|
n*********2
发帖数: 357 | 29 ECC is just the discrete logarithm over elliptic curve. It is just harder,
nothing special.
去年八月， 某个单位发布一个声明， 说这个玩意不像我们想的那么难。如果有人还没
有实现它或者理解它， 不要花钱， 花心思去试了。今年一月， 他们发布了正式的文
档。 放狗可以找到的。
（比特币就是用这个玩意的。不知道那个长期怎么办。） |
|
b******v
发帖数: 1493 | 30 3. 算法，a1,a2,a3...an, 输出，a2*a3...*an, a1*a3..*an, ...， a1a2...*a(n-1),
不能用除法
Can we use logarithm? (I guess not?) |
|
l*****a
发帖数: 559 | 31 There exists logarithmic way to do this job.
int divide(int a,int b){
int res = 0;
int digit = 1;
while(b<<1<=a){
b = b<<1;
digit = digit<<1;
}
while(digit>0&&a>0){
if(a>=b){
res +=digit;
a-=b;
}
b>>=1;
digit>>=1;
}
return res;
} |
|
B*M
发帖数: 1340 | 32 http://en.wikipedia.org/wiki/Longest_increasing_subsequence
Efficient algorithms
The algorithm outlined below solves the longest increasing subsequence
problem efficiently, using only arrays and binary searching. It processes
the sequence elements in order, maintaining the longest increasing
subsequence found so far. Denote the sequence values as X[1], X[2], etc.
Then, after processing X[i], the algorithm will have stored values in two
arrays:
M[j] — stores the position k of the smallest val... 阅读全帖 |
|
w**z
发帖数: 8232 | 33 http://stackoverflow.com/questions/825221/where-can-i-find-the-
It's a math problem more than CS. Well, don't know how far you want to go..
That is the implementation from math lib
public static double sqrt(double a) {
return StrictMath.sqrt(a); // default impl. delegates to StrictMath
// Note that hardware sqrt instructions
// frequently can be directly used by JITs
// and should be much faster than doing
// Math.... 阅读全帖 |
|
i**********e
发帖数: 1145 | 34 看错了，你传的是两个 iterator range，复杂度不是 constant，但总的来说总复杂度
应该还是 worst case O(n) 的。
那个 map -> 还是用的挺巧妙的阿，学习了。
For the last version ( erase(first,last) ), logarithmic in container size
plus linear in the distance between first and last.
http://www.cplusplus.com/reference/stl/map/erase/ |
|
i**********e
发帖数: 1145 | 35 看错了，你传的是两个 iterator range，复杂度不是 constant，但总的来说总复杂度
应该还是 worst case O(n) 的。
那个 map -> 还是用的挺巧妙的阿，学习了。
For the last version ( erase(first,last) ), logarithmic in container size
plus linear in the distance between first and last.
http://www.cplusplus.com/reference/stl/map/erase/ |
|
a***r
发帖数: 93 | 36
Complexity
Constant (in the priority_queue). Although notice that push_heap operates
in logarithmic time.
I think it means the time spent inside priority_queue is O(1),if adding in
push_heap, the overall complexity should be O(lgN). |
|
g*****9
发帖数: 4125 | 37 The decibel (dB) is a logarithmic unit of measurement that expresses the
magnitude of a physical quantity (usually power or intensity) relative to a
specified or implied reference level. Since it expresses a ratio of two
quantities with the same unit, it is a dimensionless unit. A decibel is one
tenth of a bel.
I have used their 20dB material, works very good. |
|
d******e
发帖数: 6945 | 38 GnG的线性和cherry的线性应该说的不是一个领域。
GnG说的应该是常规统计上的对数线性概念，贴个链接，
http://www.statistics.com/resources/glossary/l/llmod.php
内容如下，
Loglinear models:
Loglinear models are models that postulate a linear relationship between the
independent variables and the logarithm of the dependent variable, for
example:
log(y) = a0 + a1 x1 + a2 x2 ... + aN xN
where y is the dependent variable; xi, i=1,...,N are independent variables,
and {ai, i=0,...,N} are parameters (coefficients) of the model. |
|
t***y
发帖数: 2276 | 39 兄弟，你可能要好久才能出水呀。
http://www.ioga.com/Special/crudeoil_Hist.htm
Historical crude oil price, in last 3 years, it is more likely crude oil
price is getting higher and higher from April to May,June, and July.
再来看看AMR 和 CRUDE OIL 的对称性分布，请看2007，2008年，从2007年7月开始的一
个蝴蝶性
走势。
http://www.google.com/finance?
chdnp=1&chdd=1&chds=1&chdv=1&chvs=Logarithmic&chdeh=1&chfdeh=1&chdet=130
23
11548658&chddm=4484&chls=IntervalBasedLine&q=NYSE:AMR&ntsp=0&fct=big
我们现在迫切需要一个懂油的人来分析一下，油，到底要彪到哪里去？$118， $128,还是$138?
如果谁知道，请到... 阅读全帖 |
|
l***c
发帖数: 1634 | 40 but a lot of small-to-medium size bubbles are going to break
if you check DJIA logarithmic chart, you will find that 1940-1960 is similar
with 1980-2000. And I think 2000-now is repeating 1960-1980,
if it's true, we are going to have a 30~40% correction in the coming years |
|
|
h*****k
发帖数: 15 | 42 会议paper，ICME２０１４
第一篇关键字：video streaming, nash bargaining, logarithmic smoothing
第二篇关键字：QoE, VoIP, random forest
请站内信，最好能附上个人介绍或cv，和邮箱地址，谢谢 |
|
t******g
发帖数: 17520 | 43 http://www.spacew.com/pipermail/forum/2004-August/000675.html
It is a measure of how disturbed the Earth's magnetic field is. It varies in
value from 0 to about 400, in linear steps. It is computed from the actual
deviations (non-quiet-time deviations) measured at a number of geomagnetic
observatories (mostly mid-latitude ones) around the world. A value of 30
represents minor storm conditions. Values of 50 represent major storm
conditions and values greater than 100 represent severe storm condit... 阅读全帖 |
|
n*******e
发帖数: 2213 | 44 就是这个意思。
W在从前sabermetrics不流行的时候很重要。比方说我说过很多次的例子。
2004年Roger Clemens凭借W赢了Randy Johnson，是10年来CY最大的不公平。
Unit beat Clemens in almost every category other than W. His ERA+
was 178 while Clemens' was 146 (don't forget ERA is logarithmic);
his WHIP was 0.90 while Clemens' was 1.16. He K'ed 72 more hitters
than Clemens did (290 - 218). Still Clemens was the overwhelming
winner. It was unfair. If the vote were to be held today, I am
almost certain that Clemens has no chance.
The page has been turned. W is... 阅读全帖 |
|
P*******e
发帖数: 39399 | 45 131.9 to 136.6 太狠了
而且decibel 是logarithmic 5分贝差好多了。。。 |
|
f*1
发帖数: 837 | 46 太fancy了
http://challonge.blogspot.com/
Tuesday, January 29, 2013
Swiss Tournaments
An often overlooked major feature on Challonge.com is the Swiss tournament
format. While running a Swiss tournament on paper is a nightmare, we've
taken the pain out of it to bring its many advantages over traditional
brackets to light.
Swiss tournaments give equal play time to participants, pair players with
others of similar skill level, and determine a winner in far fewer rounds
than you'd anticipate. They're e... 阅读全帖 |
|
s*********4
发帖数: 3362 | 47
那我就Natural logarithm e 吧 |
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C******s
发帖数: 270 | 48 来自主题: ClassicalMusic版 - 恰空 给你篇文看
On the Marionette Theatre
by Heinrich von Kleist
Translated by Idris Parry
One evening in the winter of 1801 I met an old friend in a public park. He
had recently been appointed principal dancer at the local theatre and was
enjoying immense popularity with the audiences. I told him I had been
surprised to see him more than once at the marionette theatre which had been
put up in the market-place to entertain the public with dramatic burlesques
interspersed with song and dance. He assured me... 阅读全帖 |
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S*A
发帖数: 7142 | 49 海绵同学特别委屈：海绵处都是口子啊，你仔细看看。
： 你这个同学，跟我讲了半天的浓度浓度，还弄一个图给我看。这个图没讲
： 浓度啊。这个图讲的是有效性（availability）。Availability 更准确地讲是
： bioavailability,即生物有效性。浓度和生物有效性是两个不同的概念。
我的天啊，原图将的是 pH 和 availability 的关系。那个 bioavailabilty
是你自己加上去的歪说的，我先放开不管。
你在图里找不到浓度是吧？感情你不知道 pH 就浓度啊？
我问你， pH 的是衡量什么的数据？（不要跟我说酸碱度），我们说这个
水的 pH 是 7, 这个 7 是什么东西的物理数据？pH 是有严格的物理意义的。
我帮你找了吧, wiki 一下：
pH is defined as a negative decimal logarithm of the hydrogen ion activity
in a solution.
翻译就是： H+ 的浓度的对数去掉负号！
所以你不知道 pH 的物理含义，就没有明白我跟你说为什么这张图说明你的
简单理解的“只... 阅读全帖 |
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T*******m
发帖数: 27308 | 50 1. “：海绵没有口子吧，照样吸水。
海绵同学特别委屈：海绵处都是口子啊，你仔细看看。”
我的回答：植物更委屈，我的细胞之间也有口子呀！
2. “： 你这个同学，跟我讲了半天的浓度浓度，还弄一个图给我看。这个图没讲
： 浓度啊。这个图讲的是有效性（availability）。Availability 更准确地讲是
： bioavailability,即生物有效性。浓度和生物有效性是两个不同的概念。
我的天啊，原图将的是 pH 和 availability 的关系。那个 bioavailabilty
是你自己加上去的歪说的，我先放开不管。”
我的回答：你上次用的是OMG，这次用的是“我的天啊”，中英文都学得不错嘛！
原图用的的确是availability，我的意思是bioavailability 更准确一些。
你可不能先放开不管，就得管，而且要一管到底！
3. “你在图里找不到浓度是吧？感情你不知道 pH 就浓度啊？”
我的回答：是找不到浓度。第二句看不懂。
4. “我问你， pH 的是衡量什么的数据？（不要跟我说酸碱度），我们说这个
水的 pH 是 7, 这个 7 是什么东西的物理数... 阅读全帖 |
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