It has been recently recognized that fuzzy set theory provides useful concepts and tools for both the representation and analysis of the uncertainty related to geographical data. Hence the incorporation of fuzzy set methodologies into a DBMS repository for the application domain of GIS should be ...
DBMS_design theory(数据库设计理论) 超键(super key):在关系中,能唯一标识元组的属性或属性集。 候选键(candidate key):不含有多余属性的超键。 主键(primary key):若一个关系中有多个候选键,则选其中的一个为关系的主键。 ###(为什么有的时候主键可以是集合形势的?) 主属性(Primary Attribute):包含在任何...
Fuzzy Logic Set Theory - Explore the fundamentals of Fuzzy Logic Set Theory, its principles, and applications in various fields. Understand how fuzzy sets differ from classical sets.
5, uses EQUAL to represent the equal relationship in set theory. Its result contains only Mary. Q4: SELECT student FROM SC GROUP BY student HAVING SET(course) EQUAL {’CS101’, ’CS102’} Multi-Predicate Set Operation: A query with multiple set predicates may be supported by using Boolean...
Since the seminal work of Pawlak (International Journal of Information and Computer Science, 11 (1982) 341–356) rough set theory (RST) has evolved into a rule-based decision-making technique. To date, however, relatively little empirical research has been conducted on the efficacy of the rough...
data miningsearch problemsset theorytrees (mathematicsFP-Tree constructionFPmax-DS algorithmmaximal frequent itemset miningpruning technique... F Ao,Y Yan,H Jian,... - International Conference on Fuzzy Systems & Knowledge Discovery 被引量: 6发表: 2007年 A Collaborative Approach of Frequent Item S...
Database Management Systems (DBMS) –SQL, Normalization, Transactions, Indexing. Theory of Computation (TOC) –DFA, NFA, Turing Machines, Regular Expressions. Compiler Design –Lexical Analysis, Parsing Techniques, Code Optimization. Computer Organization & Architecture (COA) –Pipelines, Memory Hierarchy...
Step 3 − Show that a set S∈RnS∈Rn is convex if and only if for each integer k, every convex combination of any k points of SS is in SS.SolutionLet SS be a convex set. then, to show;c1x1+c2x2+...+ckxk∈S,∑1kci=1,ci≥0,∀i∈1,2,...,kc1x1+c2x2+...+ckxk∈S...
Set-valued attributes provide, however, a concise and natural way to model complex data concepts. Database management systems (DBMS) support attributes involving a set of values (e.g., nested table in Oracle, and SET data type in MySQL). In the above example, the “skill” attribute can ...
E-Quality Manufacturing of Bio-parts Using Rough Set Theory Rapid Prototyping (RP)Rough Set Theory (RST)Machine Vision SystemsModern advancements within manufacturing are transforming the ability to provide the consumer ... PR Bonham,TLB Tseng - Conference & Expo of the Institute of Industrial Engin...