Reliability Analysis
Sfta (Software Fault Tree Analysis) software fault tree analysis.
Software Fault Tree Analysis (sfta) is a top-down software reliability analysis method ), in particular, the incidents that have a significant impact on the safety and reliability of personnel and equipment begin to trace down the causes of the incidents until the basic incidents (bottom incidents ), to determine the possible combination modes and/or probability of occurrence of software faults.
Cut Set: it
the relational database model expression. Decision-free data analysis and decision-making data analysis are two main applications of Rough Set Theory in data analysis. Rough set theory provides the knowledge reduction and core methods to analyze redundant attributes in information systems.If the set B belongs to a and has no redundant attributes, the conciseness of B is a or at, which is marked as red (AT). The intersection of the conciseness in at is called the at core, it is recorded as core
Returns the maximum number of steps of multiplication and division. x ^ N can be obtained.
In fact, the answer is a maximum of 13, but because the branches of the tree are extremely large, while iddfs, we need to add two pruning
1 If the maximum value of the current sequence is M * 2 ^ (DEP-k)
2. If there are two numbers greater than N, the Branch is subtracted. Because there is only one useful one, we can get the answer through another shorter path.
The program looks very slow, over Ms
This qu
Description
StartingXAnd repeatedly multiplyingX, We can computeX31 with thirty multiplications:
X2 =X×X,X3 =X2 ×X,X4 =X3×X,...,X31 =X30 ×X.
The operation of squaring can be appreciably shorten the sequence of multiplications. The following is a way to computeX31 with eight multiplications:
X2 =X×X,X3 =X2 ×X,X6 =X3×X3,X7 =X6×X,X14 =X7×X7,X15 =X14×X,X30 =X15 ×X15,X31 =X30 ×X.
This is not the shortest sequence of multiplications to computeX31. The
+0.5fx (x2)L (2) =l (1) + (U (1)-L (1)) *fx (x2-1) =0.5+ (1-0.5) *fx (x2-1) =0.5+0.5fx (x2-1)X2=1, the interval is [0.5,0.6]x2=2, the interval is [0.6,0.75]X2=3, the interval is [0.75,1]Since 0.63215699 is within the interval [0.6,0.75], the second element has a sequence of 2 and the element is A2X3U (3) = L (2) + (U (2)-L (2)) *fx (x3) =0.6+ (0.75-0.6) *fx (x2) =0.6+0.15fx (x3)L (3) = L (2) + (U (2)-L (2)) *fx (x3-1) =0.6+ (0.75-0.6) *fx (x2-1) =0.6+0.15fx (x3-1)X3=1, the interval is [0.6,0.63]
RectanglesTime limit:1000/1000 MS (java/others) Memory limit:32768/32768 K (java/others)Total submission (s): 19110 Accepted Submission (s): 6187Problem Descriptiongiven-rectangles and the coordinates of the points on the diagonals of each rectangle,you has to C Alculate the area of the intersected part of the rectangles. Its sides is parallel to OX and OY.Inputinput the first line of input was 8 positive numbers which indicate the coordinates of four points that must being on EAC H Diagonal. Th
) Constrainedresult: Defines a constraint function and can have multiple.
An example of constrained function optimization
1STOPT Quick Mode Code:
Parameter x (4) =[-100,100];
Minfunction 10*x1+9*x2+8*x3+7*x4*sin (x1+x2+x3);
(3*x2+2*x4*cos (x1+x2+x3+x4)) ^2
1STOPT Programming mode Basic code:
Parameter x (4) =[-100,100];
Minimum;
StartProgr
The test instructions of this problem is to give some rectangles, asking the area of these rectangles to be covered, that is, the rectangles may intersect.
Because of the small amount of data, the problem can be divided by the method of sorting the input coordinates.
As the following code
/* id:sdj22251 prog:subset lang:c++ * * #include
There is also a rectangular cut, the principle is to split the intersecting rectangle into a few small rectangles, and then the last of all the rectangles wil
seated, so I had to find a middle location to sit down. It wasn't long before, and the back location was almost as well. Check whether there are many plmm users in Borland.Well :) After half past one, Li fatzi appeared and began to blow his magic screw. It has been a year and a half since he saw him last time. He said Borland was about to pushGalileo and Charlotte have not been found yet, but Sidewinder has become C # builder and C ++ builder has be
the combinations:(Do not take a face value of 1, take a face value of 1) * (do not take a face value of 2, take a face value of 2) * (do not take a face value of 3, take a face value of 3)= = (the number of face value is 0, the face value is 1, the face value is 2, the face value is 3, the face value is 4, the face value is 5, the face value is 6 of the number)We use X to denote the coin, and the index of x indicates the value of the coin, so:1 grams of coin combinations can be expressed in fun
,false
Intrectstart=intrectstart+50
Intsettledangle=intsettledangle + Intangle
Next
Image.filename=server. MapPath ("Http://edu.cnzz.cn/NewsInfo/test.jpg")
Image.saveimage
Set image=nothing
Response.Write "End Function
function Drawsinglepie (Image,intangle,intcolor)
' function function: Draw a rectangle based on the specified angle and color
' ************** The following is the variable definition ********************
Const pi=3.1415926 ' pi
Dim Pii ' After 180-angle converted circumference,
Given the number of N, ask how many methods you have taken to make the product of the number taken is a complete square number
The thinking span of this question is still very big
Because the number of elements in the topic is not greater than 500
Consider starting with the only decomposition
Write this n number as the only form of decomposition
Find the exponent of the corresponding element factor
For example 4 6 10 15
That is:
4 = 2^2
6 = 2^1x3^1
Ten = 2^1x5^1
* = 3^1x5^1
So four numbers corre
sequence are:L (2) =0.5+ (1-0.5) Fx (x2-1) =0.5+0.5fx (x2-1)U (2) =0.5+ (1-0.5) Fx (x2) =0.5+0.5fx (x2)If X2=1 is taken, the interval is [0.5,0.6]If x2=2 is taken, the interval is [0.6,0.75]If X2=3 is taken, the interval is [0.75,1]Because 0.63215699 falls within the interval [0.6,0.75], the second element of the sequence is A2.③ the upper and lower bounds of the third element x3 of the sequence are:L (3) =0.6+ (0.75-0.6) Fx (x3-1) =0.6+0.15fx (x3-1)U (3) =0.6+ (0.75-0.6) Fx (x3) =0.6+0.15fx (x
If you open a website in IE and enter the following magic code in your browser, you can modify and copy the page content at will!
Magic Code 1 Magic Code 1
Javascript: r = 0; X1 =. 1; Y1 =. 05; x2 =. 25; y2 =. 24; X3 = 1.6; Y3 =. 24; X4 = 300; Y4 = 200; X5 = 300; Y5 = 200; DI = document. images; Dil = di. length; function a () {for (I = 0; I-Dil; I ++) {Dis = di [I]. style; DIS. position = 'absolute '; DIS. left = math. sin (R * X1 + I * X2 + X3) *
nature, nature's mutation is a small probability event) randomly changing the value of a gene in a chromosome.Sometimes, in addition to choosing, crossing , and mutating These three operations, we also add other operations (such as reversals ) to specific issues, but select , Cross , mutation is a genetic operation in which all genetic algorithms are common.In this paper, a common application of genetic algorithm-solving complex nonlinear function extremum problem as an example to illustrate h
1, judge the same slope not, y2-y1/x2-x1,y4-y3/x4-x3, the same no intersection, not the same as the intersection of the line to perform the second step;2, set y=ax+b, through the slope can find the value of a, through the coordinates can find the value of B, so that two segments in the straight line two equations are obtained;3, through two equations to find the intersection point, and then determine whether the intersection falls in the area of inter
The BinarySearch () method provides a variety of overloaded forms to meet the needs of various types of arrays, and BinarySearch () has two parameter typesNote: This method is a two-point search method, so you need to use the sort () method to sort the array before querying, if the array is not sorted, the result is indeterminate and the otherIf the array contains more than one element of the specified value, it is not guaranteed which one is found.⑴.binarysearch (object[], object key);Returns t
function apply
Apply (X, MARGIN, FUN, ...)Parameters:X:an array, including a matrix.Margin:1: Row action; 2: Column operation
FUN: The name of the function
The result is the same as that of colmeans,colsums,rowmeans,rowsums, by using apply, which can easily be summed/averaged by ranks.
Examples are as follows:
> A> A[, 1] [, 2] [, 3] [, 4][1,] 1 4 7 10[2,] 2 5 8 11[3,] 3 6 9 12> Apply (a,1,sum)[1] 22 26 30> Apply (a,2,sum)[1] 6 15 24 33> Apply (a,1,function (x) sum (x) +2)[1] 24 28 32> Apply (a
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