lsp association

The Association rule 1 is described earlier--- does not take into account the timing relationship between items purchased by the user, but in some cases the user buys the item in a strictly sequential relationship, such as in some casual games, The user purchased a prop A to buy prop B, and props A and B can only be purchased once, that is, the purchase of props A is a sufficient condition to buy prop B, if the purchase of a user will usually buy prop

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The construction of UML quickly includes three types: (1) Things (4 types): Structured things, behavioral things, grouping things, and commenting things (2) relationship (4 types): generalization, implementation, dependency, and Association (3) diagram (10 types): use case diagram, class diagram, object diagram, package diagram, component diagram, deployment diagram, state diagram, activity diagram, sequence diagram, and collaboration Diagram Things a

Association rule mining algorithms:The so-called Association Rule mainly refers to the concurrency relationship in the index data. The most typical application is the analysis of the shopping basket. It is found that all dads buy beer when they buy diapers.Association Rule Mining has some confusing terms, see http://blog.sina.com.cn/s/blog_4d8d6303010009kb.html, there are two important concepts: support and

The construction of UML quickly includes three types: (1) Things (4 types): Structured things, behavioral things, grouping things, and commenting things (2) relationship (4 types): generalization, implementation, dependency, and Association (3) diagram (10 types): use case diagram, class diagram, object diagram, package diagram, component diagram, deployment diagram, state diagram, activity diagram, sequence diagram, and collaboration Diagram Things a

Tags: des cWeb style blog http color io os use2014-09-25 BaoxinjianI. Summary Comparison of three primary connectivity methods for Oracle1. Hash Join(1). OverviewI. Read data from a table and place it into memory and create a bitmap index of the unique keywordIi. reading another table, and comparing the in-memory table with the hash algorithm(2). Applicable objectsI. Large Table Connection Small tableIi. two large tables2. Nested Loops(1). OverviewI. Circular appearance recordII. Whether t

In the last blog post hibernate from Getting started to mastering (v.) one to one one-way association mapping we explained one to one one-way association mapping, this time we continue to explain the corresponding one-to-one two-way association mapping. One-to-one Two-way Association Unlike a one-to-one one-way

Association and aggregation dependencies in UML class diagrams and their differences This article focuses on the relationship between UML class diagrams. The main types of UML class diagrams include association, aggregation/combination, dependency, and generalization. Here we will introduce the association, the relationship between aggregation and dependency an

[Objective-C] Association (objc_setAssociatedObject, objc_getAssociatedObject, objc_removeAssociatedObjects), associatedobjectsAssociation Association means to associate two objects so that one object is part of another object.The Association feature is available only in Mac OS X V10.6 and later versions.Add additional storage space for the class beyond the class

Badminton Association During my college years, I used to love many ball games, including volleyball, table tennis, basketball, and badminton. However, among many sports, I would be best at badminton. I chose badminton for my freshman physical education class. This course is a school year. I love badminton not from college, but from elementary school. At home, I often fight with people, and my opponent is an adult. At that time, I felt that the who

category and associative as the extension mechanism of the objective-c two features, category is the type, you can extend the method through it, associative, you can extend the property through it, in iOS development, Perhaps the category is more common, relative associative, use less, to use it must be used 1. Create an association: parameter settings ( source object, keyword, associated object, and an associated policy)2. Get the associated object:

In fact, the recommendation of the hive optimization is that the large table is placed behind when the multiple tables are associated, because the previous association results are put into memory. However, Bo main article itself is also good to write. Often see some of the recommendations of the Hive optimization that when the small table with the large table to do the association, the small table written i

On the "SSH Advanced path" hibernate mapping-a one-to-many correlation mapping (vii), we present a pair of multi-correlation mappings, which is the basis of many-to-many association mappings.Many-to-many mappings are the most common mapping in real life and the easiest to understand. Talk less and start straight.Mapping principleWhether a one-way or two-way association is through the third table, the primar

This article mainly introduces the differences between model and association in inlude during sequencee connection query. This article describes the differences in detail. For more information, see the following. Preface We all know that when we use sequencee to perform connection queries Between Relational Models (tables), we will use model/as to specify the connection query model with an associated relationship, or you can use

First, prefaceIn the study of the Apriori algorithm algorithm, referring to a number of blogs and a paper, although these are very good articles, but there is no article detailed the whole process of the algorithm, so to organize a number of articles, and add some of their own annotations, with the following article. Most of these should be copy of the blog and translation of the important knowledge of the paper.The purpose of association rules is to

ArticleDirectory Inheritance Implementation Dependency Association Aggregation Combination 1 This is a tutorial on the basic knowledge of UML. Now we have been doing a project too quickly, and we have not done a real detailed design of the class level, not to mention the use of UML for standardized modeling. This article mainly sorts out the relationships between several classes that I have been confused about before,

first, the arrangement of ideas Hibernate's associated mappings, directly above: This diagram is a general idea of the whole hibernate relational mapping.second, the noun explanation 1, one-way association: Very simple, is that one object depends on another object.2. Two-Way Association: Two objects depend on each other.three or one to one (one-to-one) association