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Divide and conquer the idea of the law: The original problem is divided into several smaller but similar to the original problem of sub-problem, the recursive solution of these sub-problems, and then merge the solutions of these sub-problems to establish the solution of the original problem.The divide-and-conquer approach is followed in three steps for each level of recursion:(1) decomposition of the original problem is a number of sub-problems, these sub-problems are small instances of the orig

decision trees on datasets with many attributes. Decision tree models also have some drawbacks, such as the difficulty of dealing with missing data, over-fitting problems, and ignoring the correlations between attributes in a dataset.Compared with the decision tree model,naive Bayesian modelOriginated from classical mathematics theory, has a solid mathematical foundation, and stable classification efficiency. At the same time, the NBC model required

This is the second machine study this week, is also the 17th article of the Hulu Face Test series ~ All the content before can be found in the menu bar "machine learning", may you warm, know new.Today's content is"Classical variants of the random gradient descent algorithm"Scenario DescriptionReferring to the optimization method in deep learning, people would think of stochastic Gradient descent (SGD), but SGD is not the ideal balm, but sometimes it b

decision trees on datasets with many attributes. Decision tree models also have some drawbacks, such as the difficulty of dealing with missing data, over-fitting problems, and ignoring the correlations between attributes in a dataset.Compared with the decision tree model,naive Bayesian modelOriginated from classical mathematics theory, has a solid mathematical foundation, and stable classification efficiency. At the same time, the NBC model required

To give you painter software users to detailed analysis to share the painting of classical temperament fairy effect of the tutorial. Tutorial Sharing: 1. First we open the PT, choose Pencil to draw a sketch, usually similar to this realistic artwork is not too important, because the final basic will be covered, but the basic type or to Painting accurate, convenient after the color. Figure 1 2. Afte

This tutorial introduces a classical, elegant wedding film color method. The author mainly uses an optional color to adjust the color. This kind of palette tool is precise, if can be mastered, can pull out very good effect. This tutorial introduces a classical, elegant wedding film color method. The author mainly uses an optional color to adjust the color. This kind of palette tool is precise, if can be mas

To the users of Photoshop software to detailed analysis of the production of ink style Chinese classical painting effect of the later tutorial. Tutorial Sharing: Original: 1. Copy the original background layer and add a color mask to the duplicate layer 2, add a black and white mask, adjust its parameters. 3, drag the boat material into the background file, give it a horizontal rotati

The current password must be tested by countless people, proving that there is no trap. If you are not public, no one believes in the security of your algorithm.Many algorithms are later proven to be unsafe. Simply put, the three main foundations of modern cryptography are:1, the introduction of large prime numbers;3, the irreversible nature of the algorithm;2, based on computer operation rather than hand calculation.Based on these three points, in modern cryptography, the "encryption algorith

be a multiple of 4, and then based on this, push up 5 times, if it can be pushed to the fifth time, then the remaining Peach number I is satisfied with the condition, otherwise, the number of remaining peaches to find the minimum number of remaining peaches to meet the conditions*/{Count=0; M=i; for(k =0; k5; k++) {J= I/4*5+1; I=J; if(J%4==0) Count++; Else Break; } I=m; if(Count = =4) {printf ("the original minimum number of Peaches is:%d\n", J); Break; }} system ("Pause"); re

. There will be two ordered series A[first...mid] and A[mid ... Last] Merge. void Mergearray (int a[], int first, int mid, int last, int temp[]) {int i = First, J = mid + 1;int m = Mid, n = last;in t k = 0;while (i The efficiency of merge sorting is relatively high, set the number of series is N, divide the series into small series to Logn step, each step is a process of merging ordered series, time complexity can be recorded as O (N), so altogether O (N*logn). Since the merge sort is performe

you can see, the "bad character rule" can only move 3 bits, and "good suffix rule" moves 6 bits. The larger value of each of these two rules is moved back. The number of moving bits of these two rules is only related to the pattern string, regardless of the original text string. 6. Continue from the tail start comparison, "P" and "E" do not match, so "P" is "bad character", according to "bad character rule", 6-4 = 2 bit. Because it is the last one to mismatch, has not yet obtaine

First, choose the sort Select_sort#Finds the smallest value in an arraydeffindsmallest (arr):#Stores the smallest valuesmallest =Arr[0]#Stores The index of the smallest valueSmallest_index =0 forIinchRange (1, Len (arr)):ifArr[i] smallest:smallest=Arr[i] Smallest_index=IreturnSmallest_index#Sort ArraydefSelectionsort (arr): NewArr= [] forIinchRange (len (arr)):#Finds the smallest element in the array and adds it to the new arraysmallest =findsmallest (arr) newarr.append (Arr.pop (smallest))ret

Classic sort of bubble sort#defineSIZE 5intMain () {intA[size] = {0}; //Loop Input for(intI=0; i) {scanf ("%d",A[i]); } //Bubble Sort Core for(intI=0; i1; i++) { for(intj=0; j1-i;j++) { if(a[j]>a[j+1]) { inttemp =A[j]; A[J]= a[j+1]; A[j+1] =temp; } } } //Traverse Output for(intI=0; i) {printf ("%d", A[i]); }}Select Sort:Classic Sorting algorithm - Select sort Selection Sortfinds the smallest number in a

, mid + 1, last, temp); //Right order Mergearray (A, first, mid, last, temp); //Merge two sequential series } } BOOL MergeSort (int a[], int n) { int *p = new int[n]; if (p = = NULL) return false; MergeSort (A, 0, n-1, p); delete[] p; return true; } The efficiency of the merge sort is relatively high, set the sequence length is N, divide the series into small series to Logn step, each step is a process of merging ordered series, the time complexity can be recorde

//Newton iterative method to find square root1 DoubleMYSQRT (Doublenum)2 {3 Doublex = num/2;4 Doubley =0;5 Do{6x = x/2+num/(2*x);7y = x*x-num;8 if(y0) y =-y;9} while(y>0.0001);Ten returnx; One } A intMainintargcChar*argv[]) - { -printf"%.3f", Mysqrt (2));//1.414 the return 0; -}The following explanation is taken from somewhere else and turned around for easy viewing:The principle of this algorithm is very simple, we just constantly use (x,f (x)) tangent to approximat

The main color of the material is yellow-green, when we turn the classical color, we turn the yellow-green to green; then darken the dark part, add a little blue, and add some smoke to the picture, and the whole can be softened properly. Original Final effect 1, open the material picture, create an optional color adjustment layer, yellow, green, green, white to adjust, parameter settings such as Figure 1-4, the effect is

Classical signature is more fastidious about the use of materials, before making the need to choose according to their preferences more representative material. If the background of ink painting, costume characters and so on. Then slowly dissolve the diagram and make the desired effect. Final effect 1. Create a new 430 * 260 pixel canvas to unlock the background. 2. Open the background layer shown below, drag in the appropriate size and position,

Light blue and light yellow are the most commonly used in classical colors. There are a lot of color matching methods. You can reduce the picture saturation, get a more neutral effect, and then use the palette to slowly add a hint of blue and yellow, and then the overall tone can be a little lighter. Original Final effect 1, open the material picture, create a new layer, press the letter key "D", before the background colo

PS Tutorial teaches us to make a realistic classical scroll painting effect, the first half for the production of scrolls, back to deal with the background, and so on, there are detailed process, this article finally has provided material for everyone to practice, like friends Triple recommended: photoshop7.0 Mini version free download | Photoshop CS5 Chinese free Download | Photoshop free Download Can learn! Effect: 1: New canvas, nam

The tutorial teaches us to make the beautiful classical beauty antique signature picture with PS, likes schoolmate to study together! The so-called dissolution diagram is actually using Photoshop to remove the figure to replace the background of another evolution. But its form is completely different from the cutout. The pursuit of drawing is the ultimate excellence. But the dissolution of the map allows the softening of the edge. However, when many