Environmental Impact Analysis of Water Environment in Coal Mining Areas Based on Matter-Element Model

2010 ◽  
Vol 108-111 ◽  
pp. 403-408 ◽  
Author(s):  
Qi Liang Wang ◽  
Lei Wang
Keyword(s):  
Coal Mining ◽  
Large Scale ◽  
Impact Analysis ◽  
Water Environment ◽  
Element Model ◽  
Evaluation Index System ◽  
Assessment Model ◽  
Environment Impact ◽  
Mining Areas ◽  
Matter Element Model

In connection with the problems that coal mining accounts for water environment pollution and socio-economic development, the main factors was analyzed. From water environment system, ecological system and socio-economic system, corresponding evaluation index system was perfected and became fit for factual situation. Matter-element model of water environment impact evaluation was constructed and used to evaluate four large-scale coal mining areas. The results showed that assessment model in accordance with the objective reality. Compared with other evaluation models, matter-element model is more accurate and comprehensive. By matlab, a calculating program was made and can be dynamically amended.

The Research and Application of Masonry Structure Reliability Rating Method Based on Extenics

2013 ◽  
Vol 291-294 ◽  
pp. 1029-1038
Author(s):  
Ming Liu ◽  
Bao Feng Song ◽  
Daniel Dias ◽  
Jing Pan
Keyword(s):  
Structural Reliability ◽  
Comprehensive Evaluation ◽  
Element Model ◽  
Assessment Method ◽  
Masonry Structure ◽  
Evaluation Index System ◽  
Structure Reliability ◽  
Rating Method ◽  
Matter Element Model ◽  
Correlation Factors

Aiming at masonry structure housing, establish the structure reliability evaluation index system. Subsidiary factors index dimensionless processing, the traditional matter-element model is analyzed, and based on this, the article puts forward an improved correlation functions, establish correlation function of the correlation factors of the index layer. Consider the weight coefficients of members,gave the extension index,combining analysis of the structural member reliability and extension comprehensive evaluation of the integral structural reliability, establish the masonry structure housing reliability assessment method framework. And prove the feasibility of this method through engineering examples.

Highway Tunnel Ventilation Technology Energy-Saving Assessment Based on Matter-Element Model

2013 ◽  
Vol 779-780 ◽  
pp. 611-614 ◽  
Author(s):  
Cheng Zan Chu ◽  
Chuan Zheng Zhu ◽  
Yao Wang
Keyword(s):  
Energy Saving ◽  
New Technology ◽  
Element Model ◽  
Objective Evaluation ◽  
Evaluation Index System ◽  
Three Dimensions ◽  
Tunnel Ventilation ◽  
Highway Tunnel ◽  
Saving Effect ◽  
Matter Element Model

In recent years, with the rapid increase of tunnel percentage in Midwestern highway construction, the tunnel operation cost rise quickly. In the cost, energy consumption of tunnel ventilation and illumination occupies a great proportion. In order to realize energy-saving and emission-reduction, there have been some new ventilation technology, for instance, the improved ventilation device, the improved ventilation method, and some new ventilation control technology. However after some new technology was applied, the phenomenon of energy-saving but not money-saving appeared. For the scientific and objective evaluation of highway tunnel ventilation technology energy-saving effect, construct evaluation index system from the three dimensions of technology usability, economy, and application effect, and then evaluate the energy-saving effect based on matter-element model. The result of assessment will give decision support for the later selection of highway tunnel ventilation technology proposal.

Using Fuzzy Matter-Element Model and Triangular Fuzzy AHP Method to Select the International Construction Project Material Suppliers

2013 ◽  
Vol 357-360 ◽  
pp. 2277-2281 ◽  
Author(s):  
Jun Guan ◽  
Zhi Hui Zhang ◽  
Yong Wu
Keyword(s):  
Comprehensive Evaluation ◽  
Fuzzy Ahp ◽  
Construction Project ◽  
Element Model ◽  
Triangular Fuzzy Number ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
International Construction ◽  
Matter Element Model ◽  
Selection Of

Selection of material supplier is important to international construction project management, and can bring impacts on the project's quality, schedule and cost. Considering the features of international construction projects, we built a selection decision-making evaluation index system. Triangular fuzzy AHP (Analysis of Hierarchy Process) method was used to calculate the weights of evaluation index. Using the medium value of triangular fuzzy number, a simple and convenient method was developed to test the consistency of judgment matrix. Base on calculating the weights of evaluation index, a fuzzy matter-element model was proposed to calculate the comprehensive evaluation values. Taking the selection of cement suppliers of the Congo (Brazzaville) National Road One Second Project as an example, the Euclid closeness of alternative suppliers was calculated to determine the ranking order of alternatives.

scholarly journals Remote-Sensing Evaluation and Temporal and Spatial Change Detection of Ecological Environment Quality in Coal-Mining Areas

2022 ◽  
Vol 14 (2) ◽  
pp. 345
Author(s):  
Xinran Nie ◽  
Zhenqi Hu ◽  
Mengying Ruan ◽  
Qi Zhu ◽  
Huang Sun
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Large Scale ◽  
Coal Dust ◽  
Ecological Environment ◽  
Ecological Index ◽  
Mining Areas ◽  
Environment Quality ◽  
Temporal And Spatial

The large-scale development and utilization of coal resources have brought great challenges to the ecological environment of coal-mining areas. Therefore, this paper has used scientific and effective methods to monitor and evaluate whether changes in ecological environment quality in coal-mining areas are helpful to alleviate the contradiction between human and nature and realize the sustainable development of such coal-mining areas. Firstly, in order to quantify the degree of coal dust pollution in coal-mining areas, an index-based coal dust index (ICDI) is proposed. Secondly, based on the pressure-state-response (PSR) framework, a new coal-mine ecological index (CMEI) was established by using the principal component analysis (PCA) method. Finally, the coal-mine ecological index (CMEI) was used to evaluate and detect the temporal and spatial changes of the ecological environment quality of the Ningwu Coalfield from 1987 to 2021. The research shows that ICDI has a strong ability to extract coal dust with an overall accuracy of over 96% and a Kappa coefficient of over 0.9. As a normalized difference index, ICDI can better quantify the pollution degree of coal dust. The effectiveness of CMEI was evaluated by four methods: sample image-based, classification-based, correlation-based, and distance-based. From 1987 to 2021, the ecological environment quality of Ningwu Coalfield was improved, and the mean of CMEI increased by 0.1189. The percentages of improvement and degradation of ecological environment quality were 71.85% and 27.01%, respectively. The areas with obvious degradation were mainly concentrated in coal-mining areas and built-up areas. The ecological environment quality of Pingshuo Coal Mine, Shuonan Coal Mine, Xuangang Coal Mine, and Lanxian Coal Mine also showed improvement. The results of Moran’s Index show that CMEI has a strong positive spatial correlation, and its spatial distribution is clustered rather than random. Coal-mining areas and built-up areas showed low–low clustering (LL), while other areas showed high–high clustering (HH). The utilization and popularization of CMEI provides an important reference for decision makers to formulate ecological protection policies and implement regional coordinated development strategies.

scholarly journals Study on Vulnerability and Coordination of Water-Energy-Food System in Northwest China

2018 ◽  
Vol 10 (10) ◽  
pp. 3712 ◽  
Author(s):  
Junfei Chen ◽  
Xiaoya Yu ◽  
Lei Qiu ◽  
Menghua Deng ◽  
Ran Dong
Keyword(s):  
Food System ◽  
Coupled Model ◽  
Element Model ◽  
Northwest China ◽  
Vulnerability Index ◽  
Evaluation Index System ◽  
Countermeasures And Suggestions ◽  
Matter Element Model ◽  
Coordination Degree ◽  
F System

Water, energy and food are the basic resources for human survival and development. The coordination development of water-energy-food (W-E-F) is of great significance to promote regional sustainable development. In this study, Northwest China (Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang) was selected as the research case, and an evaluation index system was constructed to assess the vulnerability and coordination of water-energy-food (W-E-F) system based on PSR model. Then, a coupled model based on cloud-matter element model and coordination degree model was proposed. The cloud-matter element model was adopted to evaluate the vulnerability level of W-E-F system. The coordination degree model was employed to calculate the coordination degrees of W-E-F system. The results showed that, from 2006 to 2015, the vulnerability levels of W-E-F system in Northwest China were mostly at Level 1. The coordination degrees of W-E-F system belonged to the transitional development level (II) in most years. The vulnerability and coordination problems of W-E-F system in Northwest China were severe. The comprehensive vulnerability index values of W-E-F system were generally on the rise, but far from reaching a good level. Moreover, the comprehensive vulnerability index values and coordination degrees of W-E-F system in Northwest China do not match well. Finally, the countermeasures and suggestions to improve the coordinated development of water resource, energy and food in Northwest China were put forward.

scholarly journals Integrated Environmental Effect Assessment on Large Coal-Electricity Production Base and Sustainability Strategy: A Case in Xilin Gol, China

2020 ◽  
Vol 12 (15) ◽  
pp. 5943
Author(s):  
Chenxing Wang ◽  
Yan Yan ◽  
Jiaxun Li ◽  
Yuan Quan ◽  
Shanlin Li ◽  
...  
Keyword(s):  
Large Scale ◽  
Water Environment ◽  
Assessment Model ◽  
Electricity Production ◽  
Electric Networks ◽  
Assessment Index ◽  
The North ◽  
Sustainability Strategy ◽  
Assessment Index System ◽  
Comprehensive Framework

Coal-electricity production base (CEPB) is an integrated plant comprising of coal mining, power conversation and chemical treatment in a particular area. As a representative of the national energy structure’s adjustment and development, a CEPB could support the West-to-East Gas Transmission Project and manage electric networks. However, the national large-scale CEPBs are always distributed in arid and semi-arid regions in the north of China, which has already led to ecological and environmental problems to local areas. This paper aims at making a comprehensive assessment on CEPBs by building an assessment index system and an assessment model of the environmental effects of the large CEPB in Xilin Gol, China. The results showed that the integrated assessment result is 0.64, which reflects that the exploitation and construction of CEPBs have not severely damaged the ecological environment of Xilin Gol yet, but the water environment has been seriously disturbed and the damage to the atmosphere, soil and ecological system, as well as other potential ecological harm, cannot be ignored. Towards future sustainability, this paper provides five sustainable strategies which are established on a comprehensive framework, establishing monitoring mechanisms of the environmental impact process, devising metrics of sustainability and keeping regular assessment using fine management to continuously decrease the pollutants in production processes and meet goals of regional sustainable development.

scholarly journals Development and Application of Ancient Timber Buildings Structural Condition Assessment Model Based on a Fuzzy Matter-Element Model that Includes Asymmetric Proximity

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Zhongwei Gao ◽  
Donghui Ma ◽  
Wei Wang ◽  
Xiaodong Guo ◽  
Qingzi Ge
Keyword(s):  
Bearing Capacity ◽  
Crack Depth ◽  
Element Model ◽  
Structural Condition ◽  
Assessment Method ◽  
Assessment Model ◽  
Clustering Methods ◽  
Foundation Soil ◽  
Matter Element Model ◽  
Asymmetric Proximity

To properly protect ancient buildings, it is vitally important to determine the health status of these structures in a timely manner. To easily, quickly, reliably, and quantitatively assess the structure health of ancient timber buildings, this paper proposes a structure health assessment method based on fuzzy matter-element theory improved by asymmetric proximity, and the specific assessment steps are given. First, a fuzzy matter-element model is constructed; then, to effectively solve the failure problem of the maximum membership principle, the fuzzy matter-element assessment model is improved by using the theory of asymmetric proximity. The weights determined by the entropy weight and clustering methods are then combined through the game theory combination weighting concept and, finally, the structural condition of the ancient timber buildings is classified into five grades: I favorable, II ordinary, III poor, IV inferior, and V dangerous. Ten evaluation factors were chosen: bearing capacity of the foundation soil, subbase deformation, foundation damage, column and foundation connection, bearing capacity of members, connection construction, member deformation, crack slope, crack depth, and decayed/insect attacked. Taking a building built in the Republican Period in Sino-Ocean Taikoo Li, Chengdu, as an example, this model was used to assess the building’s structural condition. The results show that this method is feasible to quantitatively assess the structural condition of ancient timber buildings. It is a simple and practical assessment method that can provide a decision-making basis for maintenance, protection, and reinforcement of ancient timber buildings.

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