jl
发帖数: 398 | 1 A random varible converge to -\infty in provability
是什么定义? 多谢!
A random varible converge to -\infty with probability 1 s
是什么定义? 多谢! |
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L******k
发帖数: 395 | 2 my solution:
#include
#include
#include
#include
#include
#include
#include
using namespace std;
void jf_eval(string& in_line, unordered_map
>>& record)
{
int i_dex = in_line.find_first_of(' ');
string cur_var = in_line.substr(0, i_dex);
vector varibles;
int cur_value = 0, ele = 0;
bool new_variable = true, new_number = true; int index1 = 0;
int i = i_dex... 阅读全帖 |
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j*****n
发帖数: 23 | 3 #include
#include
#include
#include
#include
#include
#include
using namespace std; //这个最好解释一下不会真的在production上这么写
void jf_eval(string& in_line, unordered_map
//jf 是什么意思？
>>& record)
{
int i_dex = in_line.find_first_of(' ');
string cur_var = in_line.substr(0, i_dex);
vector varibles;
int cur_value = 0, ele = 0;
bool new_variable = true, new_number = true; int ... 阅读全帖 |
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G***G
发帖数: 16778 | 4 which method to use to analyze a model similar to
y~x1+x2
y is a category varible (a,b,c)
x1 is a category varible
x2 is a numeric varible |
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G***G
发帖数: 16778 | 5 but I think
the wife's softness is independant varible,
and the husband's ability is dependant varible.
A husband's ability depends on how gentle his wife's temper is.
A gentle wife in a house will help to increase a husband's ability. |
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l*****8
发帖数: 16949 | 6 不是。现在学的是Multi-varible Calculus,Linear Algebra,但是很多证明。
H家的学生进去要做数学摸底考试，差的先学一年Calculus.过关的从multi-varible
calculus学起。按难度分成21， 23，25， 55.
21和一般大学的多变量微积分类似，基本没有证明，就是强调计算和应用。23有一些证
明，25证明为主，55是给数学天才开的班。
我家女儿现在在25。以前中学学的都没有证明，全部是计算。现在的家庭作业全是证明
，而且有的难度不小，很不适应。有的直觉上知道是怎么回事，但是证明写的一塌糊涂
。每星期的家庭作业都要我把把关。2个星期下来现在好多了。这星期写的证明像点样
了。 |
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f**t
发帖数: 27 | 7
because
---------- -------
you can not declare the two varible with the same name,
doing that will cause f() has it's own local varible called a and b,
shadowing the original declared a and b in main(), so a & b in main will
not changed after f().
Instead using f(int[][] anotherA, int [] anotherB) may solve the problem.
the
definitely |
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b*****n
发帖数: 3774 | 8 这里高人多，先谢过了。
一条生产线，两个工人，N个工作台，(N>2),工人1排在工人2后面，工人2从工作台1开
始工作，完成了工作台1就走到工作台2，以此类推，直到工作台N,完成一个产品。工人
2一离开工作台1，工人2就开始在工作台1上开始操作，然后去工作台2，3，只要工人2
没有占着工作台。工人2一完成一件产品马上走回到工人1当时在的工作台，将半成品从
工人2手上接过来，工人2立刻走回工作台1开始一件新产品。如此周而复始。工人1和2
的速度都是exponential distributed, with expected value E(v1) < E(v2).
问题是：what is the production rate of this assembly line?
查了文献，如果工人的速度不是random varibles,那当趋于平衡点的时候，production
rate is simply the sum of v1+v2. 但是当速度是random varibles 的时候应该怎样
考虑呢？ |
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y****n
发帖数: 2 | 9 看到一篇文章里写到：“identifying a high-quality instrument is extremely
challenging both because it is often difficult to find an instrument that is
conceptually plausible and because there is no analytical method for
testing the quality of an instrument.....
又写道：
A variable must satisfy two criteria if it is to serve as a valid instrument
for Varible X by Variable Y. First, it must strongly predict Variable X.
Second, net of its effect on Variable X, it should be unrelated to Varible Y.
The first criteri |
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a***u
发帖数: 72 | 10 Don't know for sure. The dimensionality of the "Graph" plays a role here. For
both GA, and Monte Carlo, no a prori knowledge about convergence is there.
It's too hard to consider, unless the Graph is more specific, and the domain
of solution is clears defined.
Anyway, since the individual cost function has a simpel form here, the
derivatives of f(x,y) also have simple forms.
An equation set of N dF/dx_i ==0 is already in a close form. N equations for N
unknown varibles. With those varibles known |
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h******e
发帖数: 1791 | 11 我刚问过用proc contents可以找出变量总数，然后存在macro varible里，但这个
macro varible 无法用来引用变量，如：v&total。 |
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L***4
发帖数: 13 | 12 the temporary varibles named by the array name with numbers, such as iterm_
array1, iterm_array2, etc.
so you can simply drop it using "Drop iterm_array:;" which will drop all
varibles starts with "iterm_array".
用命
temp |
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S********a
发帖数: 359 | 13 如果纵轴dependent varible vs time(ie., independent varible)图呈现一个向上30
度的弧形，在用GENMOD procedure时候，应该用什么link合适？
非常感谢！ |
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x*********g
发帖数: 20 | 14 我的老車子最近引擎燈亮了，拿去檢查后報告說“Inspection found a faulty EGR
varible switching valve”。想請教各位大蝦這個問題嚴不嚴重？如果自己想修的話
，買零件換大概要多少錢呢？
我的車子是Toyota Camry 99。謝謝 |
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l*******r
发帖数: 511 | 15 1. static function
2. volatile varible
....太可怜了我。。。有这方面的面试题吗？咋不问我算法。。 |
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r******d
发帖数: 308 | 16 今天又面了个新的multithread的问题
题目是：说说你对multithread的理解。 thread Synchronization 都有什么method.
我答的Synchronization有mutex 和semaphore 两种方式。在那解释了一堆。。。。
回来发现， 似乎linux的ptread里面有mutex, join 和 condition varibles....
有没有熟悉的同学帮忙确定下答案对不对？
都是c#毒害的， c#里面也有join, 我怎么就没有想起来呢。。。。 看来看的东西还是
得针对题目准备， 仔细想想Synchronization的方法很多， 思路都很简单， 但是不同
的os似乎归纳得不一样， 郁闷， 看来得准备个C#的答案和c++的答案 |
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d**e
发帖数: 6098 | 17 condition varibles好像是属于monitor里面的东西
join是什么？印象中是调用join函数后，主进程要等待，直到所有线程都完成才继
续。这个应该不能算是synchronization的吧？ |
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r******d
发帖数: 308 | 18 http://en.wikipedia.org/wiki/Monitor_%28synchronization%29
在上面链接里面, 把monitor 分成了mutex 和 wait and signaling. wait and
signaling 好像就是condition varibles
我不确定的是monitor是不是每次只能够有一个thread在用cpu(monitor)? 因为在上面
的那个链接里面有说at most one thread occupies the monitor at each time
请请问一下在你看的书里面monitor是不是每次只能一个一个线程在跑? |
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x****k
发帖数: 2932 | 19 银行相关的职位，题目比较多，尽量拣记得住的写一下。
1. the difference of new/delete malloc/free. what if new/free, and malloc/
delete?
2. sizeof an empty class
3. sizeof an empty class with virtual function.
4. can we call virtual function in constructor/destructor?
5. what is pure virtual function?
6. How to disable class initialized on heap,
7. How disable class initialized on stack,
8. where static varible saved, heap or stack?(bss, data)
9. what does static mean in C++
10. what is 4 default functions for empty class
... 阅读全帖 |
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x***i
发帖数: 23 | 20 no difficult. you can use atomic varibles and operations that is new
features ( #include ) from the new standard of C++11. it is lock-
free programming for multi-threads. |
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l******t
发帖数: 9 | 21
我不是牛人，只是平时工作用到PHP, :), PHP主要有三个scope: global, class,
local
$globalVar = "a"; // global variable
class test {
private $classVar = "b"; // class varible
public function print_variable() {
print $globalVar; // print nothing and raise an variable undefined
notice
global $globalVar;
print $globalVar // print a
print $classVar; // print nothing and raise an variable undefined
notice
print $this->classVar // print b
$localVar = "c"; // local variable
... 阅读全帖 |
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C********r
发帖数: 256 | 22 那给你补一课吧，当然我也可能说错
HELOC像CC是Varible Rate的，而rate是每月调整的，但是他tie on Prime rate。
可以是P+2，p+1 p+.5 p p-.5 etc
几乎所有HELOC都会给你Intro，就是你最开始的rate，像你的3%，过期了就调整了，这样
你就知道p+1和p-.5会差多少了。问题是大部分会有条款多长时间内你不能close HELOC之
类或罚款
你的lender不告诉你margin明显就是能蒙一个就一个了。
back,
though
may |
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d*****e
发帖数: 157 | 23 From my annual physical, my cholestrol was high (approx. TG=600, HDL=34) and
so did the glucose level (fasting glucose=112). I had a follow-up one
month later and got some surprising results (TG=300, HDL=41 and glucose=90).
I wasn't put on medication nor had a big change of diet (did eat light but
nothing drastic to say the least). I am aware of TG can have huge shifts (i
.e., varibility), but I have doubts about other parameters. I guess I
should be happy because at least HDL and glucose a |
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m*****a
发帖数: 2609 | 24 Google了一下，发现ibond根CD类似，但更适合长期持有:
Pros:
* not subject to state income tax on interest (CD does)
* no federal tax ONLY if used for education purpose (CD does)
* instable rate (good or bad). Base rate(never change)+varible rate
depending on inflation (change semi-annually). (CD never changes)
Cons:
* you can't easily cash it. must hold for 1 yr before redemption. Plus, any
redemption between 1yr-5yr=3month interest penelty. Not good for short-time
money loading. (so always compare ibonds with a 5yr... 阅读全帖 |
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w*********e
发帖数: 286 | 25 亲测kroger等菜店还活着,别的要么不卖,要不cash or debit(wtf, who will buy them
with cash or debit???) |
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I**n
发帖数: 839 | 30 试了一下 确实可以 买定额的2x 买varible的1x 都是买的visa |
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发帖数: 1 | 31 Indexed或Varible Universal Life Insurance, Google
了一天，都没找到一个详细投入回报的具体例子或分析，一家都没有。到底各种fee是
多少，各种rate怎么计算的？出了20年的产品，为啥找不到任何一个20年前的真实案例
展示投入回报与每年股市债劵的比较？ |
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e*i
发帖数: 10288 | 32 varible visa/master/amex no gas points. |
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c**********x
发帖数: 271 | 33 那种varible visa gc 可以self checkout吗？ |
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N***U
发帖数: 1242 | 34 有加入的能介绍一下吗？好奇后面的varible monthly price 是怎么计算的。不敢贸
然签合同，怕被黑。 |
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S**********r
发帖数: 1410 | 35 这倒不要紧，人家可以说 require booster seat 是有初始值的全局变量或者class varible. 不
过变量名中间不应有空格，就算是伪码也没见过。 |
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b*****e
发帖数: 5133 | 36 mk18有可能，就是觉得短枪顶上装了个varible power scope觉得比较奇怪，难道是狙
击手的偏好。 |
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i****e
发帖数: 46 | 37 基本同意你的观点。略加展开。
他的观点是三等舱，男性乘客多，死的男性比例高才导致整体男性死者比例高。既然对
方用了统计术语，那么就用统计学的方法来解决这个争论。
就这个数据。要做stratify analysis. stratify on gender. colunm varible:舱位，
row variable:death 然后在各自的strata比较survival rate和趋势,看significant
与否，等等才能下定论。
总之，要提供具体数据，否则都是扯谈。 |
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J*******g
发帖数: 8775 | 38 那些东西没什么神秘的。我曾经跟一些研究量子信息的专攻贝尔不等式的人很熟，除了
贝尔不等式还有很多新的不等式。贝尔不等式只是否定local hidden varible。这些都
是科学可以证实的。
而你说那些都是一些不必要的引申，是科学没有证实的。
成熟的科学理论都没有那么多争论了，因为数据在那摆着，争论啥啊。
只有那些还不成熟的科学理论和根本不是科学的东西才有很多争论。
我认为量子力学，贝尔不等式只是其中一小部分都是比较成熟的理论。真正搞物理的才
懒得去争论这些东西。 |
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a**e
发帖数: 5794 | 39 There are many examples of jsp or vbscript,
who can give a javascript example?
thx |
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N**e
发帖数: 158 | 40 I believe this will be sufficient for you. It takes me a while to figure out
Session.Contents to add a variable.
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h****e
发帖数: 204 | 41 this kind of problems are introduced by the ' in your varibles normally.
you need replace it to '' |
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g****s
发帖数: 1 | 42 我有一个temp table存着数十个table names
求教怎样只用SQL列出所有table的count(*)
具体就是如何把temp table得一个个表名转成变量被select count(*) from 认识
现在的做法是把table name list存入一个shell varible, 然后用shell的for loop一
个一个地死算，但是这样要进进出出dbaccess几十回，不好看，如果一次能在sql
level上搞定就好了。 |
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M***D
发帖数: 478 | 43 in oracle data developer,
how to show a varible? |
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B*****g
发帖数: 34098 | 44 不明白。
看看这个是不是你要的
dbms_output.put_line(:varible); |
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s**d
发帖数: 7 | 45 static method varible
example:
Public Sub myMethod()
Static Iterations as Integer
Iterations +=1
End Sub
This feature is not available in VC# |
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e***c
发帖数: 68 | 46 7. Using an IDE
http://www.sun.com/forte/ffj/ce/
Fote is quite nice, however, it requires big memory :(
8. There are constants, Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY,
and Double.NaN.
There are rarely used in prectice. Maybe you will check whether a varible is
a number.
if( Double.isNaN(x) ) //Check whether x is "not a number".
9. Although Java is sensitive, in general, we should avoid two names that on
ly differ in their letter
case.
Box box; //ok--Box is the type and box is the var |
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n*****k
发帖数: 123 | 47
~~~~~~~~~~~~
here is the compilation error
Because in the first example, there is no instance varible(or class variable)
nameed x exists other than the local varibale inside the method, so the scope
of the x is all over the method, and it can not be shadowed any other local
variable inside the method.
On the other hand, the second example has an instance variable x and also a
local block variable x, inside the if block, the local variable |
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f****n
发帖数: 208 | 48 Java does not allow pointers. So if you want to change the value of multiple
varibles, make them the properties of an object and pass the object as
parameter for the function. I don't know what else can we do. |
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f****n
发帖数: 208 | 49 Based on my experience, these are the popular ones:
1) Final, finally and finanize key words understanding
2) Synchronized keyword and wait, notify (notifyAll) situation.
3) Serialization understanding, Static varible serialization?
4) Method overiding and overloading and shadowing
5) Java 5 features, Autoboxing, Generics...
6) Exception handling, Excepetion classes structure, checked and non checked
exception, throwable and error class
7) Collections, Differenece between arraylist, vector and l |
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f****n
发帖数: 208 | 50 Based on my experience, these are the popular ones:
1) Final, finally and finanize key words understanding
2) Synchronized keyword and wait, notify (notifyAll) situation.
3) Serialization understanding, Static varible serialization?
4) Method overiding and overloading and shadowing
5) Java 5 features, Autoboxing, Generics...
6) Exception handling, Excepetion classes structure, checked and non checked
exception, throwable and error class
7) Collections, Differenece between arraylist, vector and l |
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