scholarly journals Parameter Selection Strategy for Frequent Itemsets in Association Analysis

2020 ◽  
Vol 5 (2) ◽  
pp. 47
Author(s):  
Yuan Hai Yan
Keyword(s):  
Association Analysis ◽  
Frequent Itemsets ◽  
Parameter Selection ◽  
Selection Strategy

Shape parameter selection for multi-quadrics function method in solving electromagnetic boundary value problems

2016 ◽  
Vol 35 (1) ◽  
pp. 64-79 ◽  
Author(s):  
Huaiqing Zhang ◽  
Chunxian Guo ◽  
Xiangfeng Su ◽  
Lin Chen
Keyword(s):  
Boundary Value Problems ◽  
Condition Number ◽  
Numerical Experiments ◽  
Shape Parameter ◽  
Early Stage ◽  
Coefficient Matrix ◽  
Parameter Selection ◽  
Selection Strategy ◽  
Node Number ◽  
Content Type

Purpose – The multi-quadrics (MQ) function is a kind of radial basis function. And the MQ method has been successfully adopted as a type of meshless method in solving electromagnetic boundary value problems. However, the accuracy of MQ interpolation or solving equations is severely influenced by shape parameter. Thus the purpose of this paper is to propose a case-independent shape parameter selection strategy from the aspect of coefficient matrix condition number analysis. Design/methodology/approach – The condition number of coefficient matrix is investigated. It is shown that the condition number is only a function of shape parameter and MQ node number, and is irrelevant to the interpolated function which means case-independent. The effective condition number which takes into account the interpolated function is introduced. Then, the relation between the relative root mean square error and condition number is analyzed. Three numerical experiments as transmission line, cable channel and grounding metal box model were carried out. Findings – In the numerical experiments, there is an approximate linear relationship between the logarithm of the condition number and shape parameter, an approximate quadratic relationship with node number. And the optimal shape parameter is corresponding to the early stage of condition number oscillation. Originality/value – This paper proposed a case-independent shape parameter selection strategy. For a finite precision computation, the upper limit of the condition number is predetermined. Therefore, the shape parameter can be chosen where condition number oscillates in early stage.

Novel Sib Pair Selection Strategy Increases Power in Quantitative Association Analysis

2009 ◽  
Vol 39 (5) ◽  
pp. 571-579 ◽  
Author(s):  
Johnny S. H. Kwan ◽  
Stacey S. Cherny ◽  
Annie W. C. Kung ◽  
Pak C. Sham
Keyword(s):  
Association Analysis ◽  
Selection Strategy
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