checksum algorithm

I believe we all have the experience of finding text content under Linux, such as when we use VIM to find a word or a paragraph in a text file, Linux responds quickly and gives results, especially handy and quick!So, we have the wood to think about how Linux is correctly matched to the strings we need in voluminous text? This involves a pattern matching algorithm!1. Pattern matchingWhat is pattern matching? Pattern matching, which is th

Maximum Expectation Algorithm(Expectation-Maximization Algorithm, TranslationExpectation Maximization Algorithm) Is used for searching in statistics and depends on the Maximum Likelihood Estimation of Parameters in the probability model of unobserved recessive variables. In statistical calculation,Maximum expectation (EM) AlgorithmIt is an

destruction. The "digital fingerprint" feature of the MD5 hash algorithm makes it the most widely used file integrity checksum algorithm. Many Unix systems provide commands for calculating MD5 checksum. It is often used in the following two cases: The first is the file transfer verification. The MD5

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

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,

Second, scan line algorithm (Scan-line Filling) The scan line algorithm is suitable for the area filling of the vector graphics, only need to the geometric position of the polygon area, no need to specify the seed point, suitable for the computer automatic graphics processing occasions use, such as computer games and three-dimensional CAD software rendering and so on. To fill the vector polygon region, th

In the greedy algorithm (greedy method), the methods of constructing the optimal solution gradually are adopted. At each stage, a seemingly optimal decision is made (under certain criteria). Once a decision is made, it cannot be changed. The basis for making greedy decisions is called the greedy rule (greedy criterion). Example 1-4 [for change] a child buys less than 1 dollars of sugar and gives 1 dollars to a salesperson. The salesman hopes to find

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

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Back-to-text algorithm (java version), text algorithm java version Package com. gdh. backtext;Import java. util. HashMap;Import java. util. Map;Import java. util. Map. Entry; Public class BackText {String text;Public BackText (){Super ();This. text = null;}Public BackText (String text ){Super ();This. text = text;} Public boolean isBackText (){For (int I = 0, j = text. length ()-i-1; I If (text. charAt (I )

The planar region filling algorithm is an important algorithm in the field of computer graphics, where the region fill gives the boundary of a region (or it can be without boundary, but gives the specified color), and requires that all pixel elements within the boundary range be modified to the specified color (or pattern fill). The most commonly used in area filling is the polygon fill, in this paper we di

Concept In statistical calculations, the maximal expectation (EM) algorithm is the algorithm for finding the maximum likelihood or maximum posteriori estimation of a parameter in the probability (probabilistic) model, where the probabilistic model relies on the invisible hidden variable (latent Variable). Maximum expectations are often used in the field of data clustering for machine learning and computer v

Dijkstra algorithm definition The Dykstra algorithm (Dijkstra ' s algorithm) was presented by the Dutch computer scientist Eizhor Dextra. The Dicos algorithm uses breadth-first search to solve the single-source shortest path problem of nonnegative weighted graphs, and the algorit