canny algorithm

In large data high concurrent access, there is often a service or interface in the face of the explosion of the request is not available, or even triggered a chain reaction caused the entire system crashes. At this point you need to use one of the technical means to limit the flow, when the request reached a certain number of concurrent or rate, it is waiting, queuing, demotion, denial of service and so on. In the current limit, the two common algorithms are leaky bucket and token bucket

1. Overview The sorting algorithm is the most basic algorithm in the computer technology, and many complex algorithms use the sort. Although all sorts of sorting algorithms have been encapsulated into library functions for programmers to use, it is important to understand the idea and principle of sorting algorithm for writing high quality software. This paper

This LZ and you share the last two algorithms of GC, the replication algorithm and the tagging/finishing algorithm. As mentioned in the previous chapter on the marking/elimination algorithm, both of these algorithms evolve on this basis, and what are the two algorithms that optimize the previous tagging/removal algorithms? Replication

Reprint please add:http://www.cnblogs.com/courtier/p/4273193.html Before starting this article, the nagging words: 1: First, before reading this article, you should at least understand, what is the finite state machine, what is the KMP algorithm, because, this article is from the source of KMP, finite stateMachine, because, KMP is the DFA (deterministic finite automaton) on the simplification.2: Many KMP articles (limited automata

The general minimum spanning tree algorithm is divided into two kinds of algorithms:One is the Kruskal algorithm: the idea of this algorithm is to use the idea of greed, the weight of each side of the first order, and then each time to select the current minimum edge, to determine whether this side of the point has been selected, that is already in the tree, is g

Rplace.cTitle: Assume that the string "Qwer TYUBFG hsdf jjhg" exists, and that the string has a large enough space-writing algorithm to replace the space characters with "%20".Requirements: Time complexity: O (n), spatial complexity: S (1).Algorithm Analysis:To achieve a time complexity of O (n), a loop must be used, and the loop control is controlled by the array length n, which can be used multiple loops.

You must be able to read it. Algorithm base Book code example based on Python more than 400 diagrams, a vivid introduction to the implementation of the algorithm to show the advantages and disadvantages of the performance of different algorithms teach you to use common algorithms to solve daily problems faced by the actual programming This book is easy to understand, there is no big span of thinking jump,

Introduction: Consistent hashing algorithm a distributed hash (DHT) implementation algorithm, proposed by MIT in 1997, aims to solve the hot spot problem in the Internet, the original intention and carp very similar. Consistent hashing fixes the problem with the simple hashing algorithm used by Carp, which allows distributed hashing (DHT) to be truly applied in

One, knapsack problem description:There are n items and a backpack with a weight of M, the weight of the article I is w[i], the value is p[i]. The solution of which items are loaded into the backpack allows the sum of the costs of these items to be no more than the backpack weight and the maximum value.Second, the solution:1, greedy algorithm: Greedy algorithm based on the idea is that every choice is the b

1.The distance vector routing algorithm (Distance vector ROUTING,DV) is the first routing algorithm used on the ARPANET network, also known as Bellman-ford routing algorithm and Ford-fulkerson algorithm, mainly in RIP (route Information Protocol) protocol. Cisco's IGRP and EIGRP routing protocols are also using DV as a

D1,D2,D3 is a subset of samples of young, middle-aged and old age, respectively. Age-Conditional information gain is Information gain with work Have information about the house gain Information gain on credit conditions Finally, the information gain value of each feature is compared, and the information gain value of its own house is maximal for the characteristic A3, so the feature A3 is chosen

(A book "Programmer's Practical Algorithm" (Andrew Binstock/john Rex), the Internet has a Chinese electronic version, but recommended to buy a genuine, this is a classic book. ） 1. Overview The sorting algorithm is the most basic algorithm in the computer technology, and many complex algorithms use the sort. Although all sorts of sorting algorithms have been enc

Kruskal algorithm and prim algorithm of minimum spanning treeDepending on the depth-first traversal and breadth-first traversal of the graph, all vertices can be connected with the fewest edges, and no loops are formed. This tree structure, which joins all vertices and the path is unique, is called a spanning tree or an extension tree. In practice, the weights and minimums of all sides of the spanning tree

First, merge Sort methodMerge sort is an efficient or relatively high algorithm. The divide-and-conquer approach is often used as a solution to this problem, and today's popular cloud computing is in fact a sort of application of the divide-and-conquer approach.The so-called division of the Law, the literal interpretation is "divide and conquer", is to divide a complex problem into two or many other similar or similar sub-problems, until the last sub-

K-Nearest-neighbor algorithm for machine learning (KNN algorithm) first, the conceptK-Nearest Neighbor algorithm is a simple machine learning method based on the distance between different eigenvalues. This paper simply introduces the next KNN algorithm and uses it to realize handwritten digit recognition. working pr

between any two points is updated to:by knowing that, when compared to only allowing transit through the number 1th vertices, this allows the transfer through vertices 1 and 2nd, making e[1][3] and e[4][3] shorter distances. in the same vein, the shortest distance between any two points is continued in cases where only 1, 2, and 3rd vertices are allowed to be brokered. The shortest distance between any two points is updated as follows:Finally, all vertices are allowed as a transit, and the fina

Today began to study the Redis source code some of the tools in the implementation of the tool class in any language, the implementation of the algorithm principle should be the same, so you can take this opportunity to learn some of the more classical algorithms. Like I see today. CRC cyclic redundancy check algorithm and rand random number generation algorithm.

A * algorithm is a heuristic search algorithm. People who understand BFS, DFS, or Dijkstra algorithms should know that. These algorithms are a way of blindly searching around. Heuristic Search: Heuristic search is the search in the state space to evaluate the location of each search, get the best location, and then from this location to search until the target. This can omit a lot of fearless search path,