Warning Model for Debt Risk of Toll Highway Based on Efficacy Coefficient Method

2009 ◽  
Author(s):  
Fenglan Bian ◽  
Xiaoming Huang ◽  
Pengcheng Shangguan ◽  
Xiaofeng Yu
Keyword(s):  
Warning Model ◽  
Efficacy Coefficient Method ◽  
Coefficient Method

Research on Surrounding Rock Stability by Ideal Point-Rough Set Efficacy Coefficient Method

2013 ◽  
Vol 353-356 ◽  
pp. 415-420 ◽  
Author(s):  
Guo Ren Lu ◽  
Le Wen Zhang ◽  
Dao Hong Qiu ◽  
Xiao Feng
Keyword(s):  
Stability Analysis ◽  
Rough Set ◽  
Ideal Point ◽  
Surrounding Rock ◽  
Ideal Solution ◽  
Rock Stability ◽  
The Stability ◽  
Efficacy Coefficient Method ◽  
Coefficient Method ◽  
The Ideal

The ideal point method is a kind of multiple-goal decision analysis method, the basic idea is to construct the ideal and anti-ideal solution of multi attribute problem, with degree that near ideal solution and away from the anti-ideal solution as the basis to judge each evaluation object. Based on the basic principle of ideal point method, and comprehensive consideration of the actual geological conditions of Qingdao metro, we selected rock compressive strength, integrity coefficient, structure surface behavior, groundwater and softening coefficient as the evaluation factors of surrounding rock stability, and used the rough set theory to determine the index weight. At last, established the evaluate model for the surrounding rock stability of metro based on the rough set efficacy coefficient method. The research show that the stability analysis results are consistent with the actual excavation, so using rough set efficacy coefficient method to analysis surrounding rock stability of Qingdao Metro is feasible, which provides a new idea for the stability analysis of surrounding rock.

Study on Rockburst Intensity Prediction Based on Efficacy Coefficient Method

2013 ◽  
Vol 353-356 ◽  
pp. 1277-1280 ◽  
Author(s):  
Dao Hong Qiu ◽  
Shu Cai Li ◽  
Le Wen Zhang
Keyword(s):  
Tensile Strength ◽  
Water Diversion ◽  
Hydropower Station ◽  
Energy Index ◽  
Affecting Factors ◽  
Diversion Tunnel ◽  
Evaluation Indexes ◽  
Intensity Prediction ◽  
Efficacy Coefficient Method ◽  
Coefficient Method

Based on the basic principle of the efficacy coefficient method, a model of rockburst intensity prediction was established. Considering the key affecting factors of rockburst, three factors were selected as evaluation indexes including the ratio of maximum tangential stress and rock uniaxial compressive strength, the ratio of compressive and tensile strength of rock and elastic energy index. Finally, the model was applied to the rockburst prediction of water diversion tunnel of Jiangbian hydropower station and the results show that the method is reliable, and it provids a new idea to predict rockburst.

Research on Space Allocation Problem of Export Yard in Container Terminals

2014 ◽  
Vol 543-547 ◽  
pp. 4202-4207
Author(s):  
Hong Tao Xu ◽  
Yan Yang ◽  
Kai Yin ◽  
Jiang Wang
Keyword(s):  
Integer Programming ◽  
Programming Model ◽  
Allocation Problem ◽  
Container Terminals ◽  
Space Allocation ◽  
Workload Imbalance ◽  
Objective Model ◽  
Efficacy Coefficient Method ◽  
Coefficient Method ◽  
Single Objective

A multi-objective model is proposed, for export yard space allocation problem in container terminals, with the objectives to minimize the total distance to transport containers and the workload imbalance between blocks. An improved linear efficacy coefficient method is proposed to deal with both objectives in order to formulate the problem as a single-objective integer programming model.

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