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A new early warning method for dam displacement behavior based on non-normal distribution function

Water Science and Engineering 2022年第2期15卷 170-178页

作者： Zhen-xiang Jiang Hui Chen School of Hydraulic and Ecological Engineering Nanchang Institute of TechnologyNanchang 330099China

Traditional methods for early warning of dam displacements usually assume that residual displacements follow a normal *** assumption deviates from the reality,thereby affecting the reliability of early warning results and leading to misjudgments of dam displacement *** solve this problem,this study proposed an early warning method using a non-normal distribution function.A new early warning index was developed using cumulative distribution function(CDF)*** method of kernel density estimation was used to calculate the CDF values of residual displacements at a single *** copula function was used to compute the CDF values of residual displacements at multiple *** results showed that,with residual displacements in a non-normal distribution,the early warning method proposed in this study accurately reflected the dam displacement behavior and effectively reduced the frequency of false *** method is expected to aid in the safe operation of dams.

关键词： non-normal distribution Dam displacement Early warning index Kernel density estimation Copula function

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A FRAMEWORK OF SETTING UP GOAL CONTROL LIMITS OF TARGET COSTING FOR non-normal distributionS

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Journal of Systems Science and Systems Engineering 2007年第4期16卷 424-433页

作者： Hsin-Hung WU Fong-Jung YU Department of Business Administration National Changhua University of Education Changhua Taiwan China Department of Industrial Engineering and Technology Management Da-Yeh University Changhua Taiwan China

This study provides a framework of target costing to extend its original scope when the underlying distribution is non-normal. The new specification limits can be derived by listening to the market price from Taguchi loss function. Later, the new specification limits can be linked through the non-normality-based C^^pk value along with non-normality-based X^^-Rcontrol charts to derive goal control limits. Moreover, an example is provided to illustrate the usefulness of the proposed framework of target costing by relentlessly reducing cost and improving product quality to gain competitiveness in the marketplace.

关键词： Target costing Taguchi loss function goal control limit process capability index non-normal distribution

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