角色基数限制(cardinality constraints) 和角色互斥(mutually exclusive roles)是最重要的两种限制[3]。我们将在下一节给出MDRB… www.docin.com|基于9个网页 3. 基数限制条件 如图3-4多对多关联图所示: 3.4.2基数限制条件(Cardinality Constraints) 「基数限制条件」是在关联型态更进一步标示实体允 … ...
cardinality constraints 网络 基数约束;cardinality 英[kɑ:dɪ'nælɪtɪ] 美[ˌkɑ:də'nælətɪ]n. 基数;[例句]They have the same cardinality.它们有相同的基数。
基数限制条件CardinalityConstraints.PPT,斷層陷阱(Chasm Traps)是指實體間應該存在的關聯根本不存在,2個實體間並沒有辦法找到一條路徑來連接。例如:一位學生可以修多門課程,每一位學生會購買多本教課書,如下圖所示: 6-4-2 斷層陷阱-說明1 但是學生可能不買教課書,
cardinality constraintsdata modelsinference rulesn-ary relationship typessemanticsData modelsInformation technologyIn this paper, we analyse cardinality constraints for n-ary relationship types. In general, cardinality constraints consist of minimum and maximum parts. We extend the approach presented in [4]...
Paper tables with annotated results for Constrained Clustering: General Pairwise and Cardinality Constraints
Cardinality constraints and functional dependencies together can express many semantic properties for applications in which data is certain. However, modern applications need to process large volumes of uncertain data. So far, cardinality constraints and functional dependencies have only been studied in ...
Boolean cardinality constraints (CCs) state that at most (at least, or exactly) k out of n propositional literals can be true. We propose a new, arc-consistent, easy to implement and efficient encoding of CCs based on a new class of selection networks. Several comparator networks have been...
When semicontinuous and cardinality constraints are used for portfolio optimization, this leads to mixed integer nonlinear programming problems (MINLP). ThePortfolioclass allows you to configure these two constraints, specifically, semicontinuous constraints usingsetBoundswith'Conditional'BoundType, and cardinal...
Besides the previous examples, there are a number of cases where an underdetermined system of equations is the result of our inability to obtain a sufficiently large number of measurements, due to physical and technical constraints. This is the case in MRI imaging, which will be presented in mo...
In the case where Φ represents a cardinality constraint, such translation leads to conditional cardinality constraints subject of the present paper. We first show that when all the clauses encoding the cardinality constraint are augmented with an additional new variable, most of the well-known ...