- block algorithm
- 分程序算法
English-Chinese computer dictionary (英汉计算机词汇大词典). 2013.
block algorithm
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Block Truncation Coding — Block Truncation Coding, or BTC, is a type of lossy image compression technique for greyscale images. It divides the original images into blocks and then uses a quantiser to reduce the number of grey levels in each block whilst maintaining the… … Wikipedia
Block matrix pseudoinverse — is a formula of pseudoinverse of a partitioned matrix. This is useful for decomposing or approximating many algorithms updating parameters in signal processing, which are based on least squares method. Derivation Consider a column wise… … Wikipedia
Algorithm characterizations — The word algorithm does not have a generally accepted definition. Researchers are actively working in formalizing this term. This article will present some of the characterizations of the notion of algorithm in more detail. This article is a… … Wikipedia
Block cipher — In cryptography, a block cipher is a symmetric key cipher operating on fixed length groups of bits, called blocks, with an unvarying transformation. A block cipher encryption algorithm might take (for example) a 128 bit block of plaintext as… … Wikipedia
Block Wiedemann algorithm — The Block Wiedemann algorithm for computing kernel vectors of a matrix over a finite field is a generalisation of an algorithm due to Don Coppersmith. Coppersmith s algorithm Let M be an n imes n square matrix over some finite field F, let x… … Wikipedia
Block Lanczos algorithm for nullspace of a matrix over a finite field — The Block Lanczos algorithm for nullspace of a matrix over a finite field is a procedure for finding the nullspace of a matrix using only multiplication of the matrix by long, thin matrices. These long, thin matrices are considered as vectors of… … Wikipedia
Block nested loop — A block nested loop is an algorithm used to join two relations in a relational database.This algorithm is a variation on the simple nested loop join used to join two relations R and S (the outer and inner join operands, respectively). Suppose |R| … Wikipedia
Block-matching algorithm — A Block Matching Algorithm (BMA) is a way of locating matching blocks in a sequence of digital video frames for the purposes of motion estimation.The purpose of a block matching algorithm is to find a matching block from a frame i in some other… … Wikipedia
Block matrix — In the mathematical discipline of matrix theory, a block matrix or a partitioned matrix is a matrix broken into sections called blocks. Looking at it another way, the matrix is written in terms of smaller matrices.[1] We group the rows and… … Wikipedia
Block cipher modes of operation — This article is about cryptography. For method of operating , see modus operandi. In cryptography, modes of operation is the procedure of enabling the repeated and secure use of a block cipher under a single key.[1][2] A block cipher by itself… … Wikipedia
International Data Encryption Algorithm — IDEA An encryption round of IDEA General Designers Xuejia Lai and James Massey … Wikipedia
