scholarly journals Ranking media for multi-pollutant removal efficiency in bioretention

2018 ◽  
Vol 77 (8) ◽  
pp. 2023-2035 ◽  
Author(s):  
Ying Mei ◽  
Long Gao ◽  
Hang Zhou ◽  
Kun-Hao Wei ◽  
Na-Qi Cui ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Management Practice ◽  
Evaluation Model ◽  
Infiltration Rate ◽  
Pollutant Removal ◽  
Fuzzy Synthetic Evaluation ◽  
Analytic Hierarchy ◽  
Best Management ◽  
Removal Capacity ◽  
Synthetic Evaluation

Abstract Bioretention is an effective best management practice for urban stormwater. This study aims to provide guidance for selecting the best bioretention medium in terms of pollutant removal capacity. Fuzzy set theory was applied with the improved analytic hierarchy process (IAHP) for weight determination, thus forming the fuzzy synthetic evaluation model, to assess the comprehensive efficiencies of certain sand media. This work is the first to use this method to study bioretention. Results demonstrated that the fuzzy synthetic evaluation model was a rational choice for the selection of bioretention media. The studied media were ranked by pollutant removal capacity as follows: Media III > Media V > Media I > Media VI > Media II > Media VII > Media IV. Media I had the best comprehensive removal efficiency and infiltration rate in bioretention. Moreover, the removal rates for Cd2+, Zn2+ and Pb2+ were excellent (>80%), those for Cu2+ and NH+4-N fluctuated from 58.1% to 92.7% and 64.7% to 95.9%, respectively, and those for NO−3-N and TP of the seven media did not show distinct differences.

Double-Layer Fuzzy Synthetic Evaluation Model of the Colour Comfort Degree in Industrial Circumstance

2012 ◽  
Vol 591-593 ◽  
pp. 2540-2544
Author(s):  
Huai Cao ◽  
Xiao Hui Wang ◽  
Fei Yi Mao ◽  
Chong Feng
Keyword(s):  
Double Layer ◽  
Evaluation System ◽  
Evaluation Model ◽  
Fundamental Principle ◽  
Grey System Theory ◽  
Fuzzy Synthetic Evaluation ◽  
Grey System ◽  
Analytic Hierarchy ◽  
New Model ◽  
Synthetic Evaluation

The color comfort degree is the fundamental principle of the color design in industrial environment. Based on the fuzzy synthetic evaluation model in fuzzy mathematics, the new model uses analytic hierarchy process to constitute a factor set which will affect the assessing of the colour comfort degree, and analyses the existing research data and applies the grey system theory when the data of some factors are insufficient, to quantify the weight and set up the change curve of the factors. By fuzzy evaluating the comfort degree of each factor with the data on the curve, the new model reduces the subjective judgments in the evaluation model and updates to a more objective and accurate evaluation system-the double-layer fuzzy synthetic evaluation model.

Fuzzy Synthetic Evaluation for Aviation Maintenance Support Ability

2013 ◽  
Vol 307 ◽  
pp. 429-432
Author(s):  
Xu Sheng Gan ◽  
Jing Shun Duanmu ◽  
Jian Guo Gao
Keyword(s):  
Support System ◽  
Evaluation Method ◽  
Influence Factor ◽  
Evaluation Model ◽  
Evaluation Index System ◽  
Fuzzy Synthetic Evaluation ◽  
Analytic Hierarchy ◽  
Good Decision ◽  
Aviation Maintenance ◽  
Synthetic Evaluation

To improve the evaluation level for aviation maintenance support system and provide a good decision-making for aircraft maintenance support, a quantitative evaluation method for aviation maintenance support ability is proposed. first the evaluation index system for aviation maintenance support ability is given on the basis of factor analysis for aviation maintenance support system, and then using Analytic Hierarchy Process to determine the weight of each influence factor, finally, based on fuzzy mathematics method, the three-level fuzzy synthetic evaluation model is established. The actual example validates is feasibility and effectiveness.

Multiple-event study of bioretention for treatment of urban storm water runoff

2005 ◽  
Vol 51 (3-4) ◽  
pp. 177-181 ◽  
Author(s):  
C.-H. Hsieh ◽  
A.P. Davis
Keyword(s):  
Removal Efficiency ◽  
Management Practice ◽  
Infiltration Rate ◽  
Storm Water ◽  
Water Runoff ◽  
Storm Events ◽  
Best Management ◽  
Set Up ◽  
The Impact ◽  
Urban Storm

Bioretention is a novel best management practice for urban storm water, employed to minimize the impact of urban runoff during storm events. Bioretention consists of porous media layers that can remove pollutants from infiltrating runoff via mechanisms that include adsorption, precipitation, and filtration. However, the effectiveness of bioretention in treating repetitive inputs of runoff has not been investigated. In this study, a bioretention test column was set up and experiments proceeded once every week for a total of 12 tests. Through all 12 repetitions, the infiltration rate remained constant (0.35 cm/min). All 12 tests demonstrated excellent removal efficiency for TSS, oil/grease, and lead (99%). For total phosphorus, the removal efficiency was about 47% for the first test, increasing to 68% by the twelfth test. For ammonium, the system removal efficiency ranged from 2.3% to 23%. Effluent nitrate concentration became higher than the influent concentration during the first 28 days and removal efficiency ranged from 9% to 20% afterward. Some degree of denitrification was apparently proceeding in the bioretention system. Overall, the top mulch layer filtered most of TSS in the runoff and prevented the bioretention media from clogging during 12 repetitions. Runoff quality was improved by the bioretention column.

Study on Civil Architecture Energy Conservation Efficiency Fuzzy Synthetic Evaluation

2011 ◽  
Vol 94-96 ◽  
pp. 2292-2296
Author(s):  
Yong Ping Wang ◽  
Pei Yang ◽  
Chun Quan Dai
Keyword(s):  
Energy Conservation ◽  
Evaluation System ◽  
Evaluation Model ◽  
Evaluation Methodology ◽  
Efficiency Evaluation ◽  
Fuzzy Synthetic Evaluation ◽  
Conservation Efficiency ◽  
Synthetic Evaluation

Civil architecture energy conservation efficiency evaluation is a kind of multi-factors, multi-hierarchies and multi-criteria synthetic evaluation. Perfect civil architecture energy conservation efficiency evaluation indicators system and reasonably effective synthetic evaluation methodology are keys to do energy conservation efficiency synthetic evaluation. This paper is based on framing civil architecture energy conservation efficiency evaluation system, and uses fuzzy synthetic evaluation methodology to frame civil architecture energy conservation efficiency fuzzy synthetic evaluation model, in order to make the result of evaluation more objective and reasonable.

Fuzzy Synthetic Evaluation of Power Quality Based on Combination Weighting Method

2011 ◽  
Vol 201-203 ◽  
pp. 2470-2475
Author(s):  
Yuan Sheng Huang ◽  
Li Ming Yuan
Keyword(s):  
Power Quality ◽  
Fuzzy Theory ◽  
Evaluation Model ◽  
Weight Coefficient ◽  
National Standard ◽  
Fuzzy Synthetic Evaluation ◽  
Entropy Weight ◽  
Weighting Method ◽  
Evaluation Indexes ◽  
Synthetic Evaluation

According to the national standard, this paper presents the evaluation indexes of power quality and the classifications of each index. The method integrates advantages of both G1 and entropy weight coefficient method. Also, it establishes an fuzzy synthetic evaluation for power quality evaluation by fuzzy theory. 5 observation points on the power quality was graded. The test shows that the combination weighting evaluation model based on fuzzy synthetic evaluation can evaluate the power quality comprehensively and effectively.

Method of Parallel System Performance Evaluation Based on Multi-Level Fuzzy Synthetic Evaluation Model

2011 ◽  
Vol 301-303 ◽  
pp. 1202-1207
Author(s):  
Xue Mei Hou ◽  
Lei Yu ◽  
Zhi Bo Li ◽  
Zhu Ping Du ◽  
Bai You Lian
Keyword(s):  
Performance Evaluation ◽  
System Performance ◽  
Hot Spot ◽  
Evaluation Model ◽  
Evaluation Process ◽  
Parallel System ◽  
Fuzzy Synthetic Evaluation ◽  
Multi Level ◽  
System Performance Evaluation ◽  
Synthetic Evaluation

Nowadays, the parallel system performance evaluation is the hot spot topic. It’s helpful to improve the parallel system performance to establish a scientific evaluation model. In this paper, using of analytic hierarchy process and the fuzzy mathematics theory, the multi-level fuzzy synthetic evaluation model is established, the performance index system is defined and the parallel system performance evaluation process is realized.

Sign in / Sign up

Export Citation Format

Share Document