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In recent years, FCM algorithm has become more and more popular, and has been applied to various fields, and the improvement of FCM algorithm is more and more. This paper summarizes the recent two years of algorithm improvement, if there are improved algorithms not all please find out for yourself oh, too many papers. As the reference documents are English papers, here is not translated, after all, I am not
Introduction to FCM clustering algorithms The FCM algorithm is a division-based clustering algorithm. Its idea is to maximize the similarity between objects divided into the same cluster, and minimize the similarity between different clusters. The fuzzy C-mean algorithm is an improvement of the ordinary C-mean algorithm. The ordinary C-mean algorithm is hard to divide data, while
For the example project, see: Http://files.cnblogs.com/laviewpbt/%e5%9b%be%e5%83%8f%e6%a8%a1%e7%b3%8a%e8%81%9a%e7%b1%bb.rar I wrote about the VB6.0 Implementation and Application of the Fuzzy Clustering Algorithm (FCM) and hard clustering algorithm (HCM) a year ago.Later, many colleagues asked me how to apply this algorithm to color image segmentation. In view of the particularity of image data, here we will talk about some details about clustering a
FCM algorithm is a clustering algorithm based on partition, and its idea is to make the similarity between the objects divided into the same cluster is the largest, and the similarity between different clusters is the least. The fuzzy C-means algorithm is an improvement of the ordinary C-means algorithm , the ordinary C- means algorithm is hard to divide the data, and FCM is a kind of flexible fuzzy divi
matrix expression consisting of elements between 0 and 1 is used.The affiliation of the object to the category.To give a one-dimensional example, given a particular data set, the map is distributed as follows:It is easy to distinguish two kinds of data from the graph, which is expressed as ' A ' and ' B ' respectively. Using the aforementioned K-means algorithm, each data is associated with a specific centroid, membership functionAs shown below:Using FCM
Oracle [Oracle] History of the Oracle ――oracle company legend Author: fenng Date: Sep 09 2004 The origins of Oracle Company It is hard to imagine the Oracle Company's saga starting with IBM. 1970 June, IBM researcher Edgar Caut
Oracle learning path (5) ----- General oracle data type operations, oracle ----- oracle1. Some common Operators Operator Meaning = Equal Not equal Less > Greater Less than or equal > = Greater than or equal + Plus sign - Minus sign
Original: http://blog.csdn.net/robinson_0612/archive/2010/04/26/5529239.aspx -- ===================================================== === -- Oracle instance and Oracle Database (Oracle Architecture) -- ===================================================== === /* For those who are new to Oracle databases, the two conce
1. Oracle Overview-Oracle Database, referred to as Oracle. Oracle (Oracle) is an object-relational database management system (ORDBMS) in the United States. Currently occupies a major share of the database market.-Oracle's history: 1977 Ellison and two friends, established R
Label:Oracle 11G RAC Database installation (eight) Overview: write down the original intent and motivation of this document, derived from the Oracle Basic operating Manual of the previous article. The Oracle Basic Operations Manual is a summary of the author's vacation on Oracle's foundational knowledge learning. Then form a summary of the system, a review review, the other is easy to use. This doc
Tags: http io ar using SP for on file dataThe problem to the machine environment:Oracle 11gR2 64bitNavicat for Oracle 11.0.10According to the practices of some of the great gods on the internet and some of the personal speculations, the following are summarized:The problem occurs because the navicat is inconsistent with the number of bits of Oracle, the former 32bit, the latter 64bitSome of the online pract
Tags: OracleSet power on (Linux) auto-start Oracle shutdown automatically shuts down Oracle1, switch to the root user, confirm that the startup file and the shutdown file is present[Email protected] bin]$ pwd/u01/oracle/product/10.2.0/db_1/bin[[email protected] bin]$ ls DbstartDbstart--sqlplus script to invoke when executing startup[[email protected] bin]$ ls DbshutDbshut--sqlplus the script to invoke when
Oracle redo complexity-oracle Core Technology Reading Note 3, redo-oracle I. Overview We know that in oracle, Every modification to a piece of data generates a redo (that is, redo, which records the modified content ). The purpose is to back up the modified data for future redo. Now there is a problem. Redo logs are ge
Because of the installation of Oracle 10G when there was a problem, and then asked roommates to send a copy of the Oralce 10g client installation package came up. It was possible to use Pl/sql, and then, in the case of a job need, to import an Oracle database backup from a colleague at a time, making IMP statement to import a 6550 error, the internet to check the reason is because the server and the clien
Resume oracle.sh in/etc/profile.d/ The contents are as follows in Nls_lang setup encoding 1 oracle_home=/usr/lib/oracle/12.1/client642 c_include_path=/usr/include/ oracle/12.1/client643 ld_library_path= $ORACLE _home/lib4# RememberThis was the client Nls_lang not the server one5 nls_lang=6 Export Oracle_ho ME Ld_library_path Nls_lang Then modify the/ETC/INIT.D
, starting at m and intercepting N characters consecutively.---need to note: The database subscript is starting from 1!!!---n is truncated to the end of the current string if the number that is not specified or specified exceeds the actual character length that can be intercepted. n is the length.---if M is negative, it is intercepted from the countdown position. The number at the end cannot be negative.SELECT SUBSTR (' thinking in from dual;--->inSELECT SUBSTR (' thinking in from dual;--->in---
Some time ago I started to learn some basic knowledge about oracle. To facilitate exercises and operations, I installed an Oracle 10 Gb. After the installation is complete, the current database is directly deprecated. The card is terrible. The card can only be used for surfing the Internet. At that time, I was too busy to do anything else, so I never care about it. Together with the last Internet cafe. Thes
Method 1: As we all know, to connect to Oracle using PL/SQL, you need to install the Oracle client software. Have you ever wondered whether to directly connect to Oracle without installing the Oracle client? In fact, I always wanted to do this, because this client is so annoying !!! Not only will JDK be installed,
Label:Data Guard is a remote replication technology for Oracle, it has physical and logical points, but in general, it needs a separate system in a remote location, two sets of hardware configurations can be different systems, but the software structure of the two systems are consistent, including the software version, directory storage structure, and data synchronization (in fact, is not real-time synchronization), the two sets of systems as long as
Oracle BASICS (9) Oracle architecture and oracle infrastructure 1. Oracle Architecture Overview: Oracle architecture refers to the composition, working process and principle of the database, as well as the organization and management mechanism of data in the database. To und
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