scholarly journals Application of Matter Element Analysis in Power Grid Development Diagnosis

2021 ◽  
Vol 267 ◽  
pp. 01052
Author(s):  
Chao Xu ◽  
Di Huang ◽  
Zhe Chen ◽  
Dong Peng ◽  
Lang Zhao ◽  
...  
Keyword(s):  
Power Grid ◽  
Power Grids ◽  
Utilization Efficiency ◽  
Analysis Method ◽  
Key Factors ◽  
Element Analysis ◽  
Development Level ◽  
Matter Element Analysis ◽  
The Index System ◽  
Security And Reliability

The structure and form of modern power grids are becoming more and more complex, and there are many indicators and factors that need to be considered to evaluate the development status of the power grid. In order to diagnose the development level of power grid, the index system is reconstructed, which includes seven dimensions: the coordination of power grid development speed, the coordination of power grid development scale, the coordination of power grid structure, the security and reliability of power grid, the level of equipment, the utilization efficiency of power grid and the development benefit of power grid, the construction principle and index selection basis are given. When dealing with contradictory problems in reality, methods combining quantitative and qualitative can be applied to study. The matter element analysis method is applied to power grid development diagnosis, and a model of power grid development diagnosis based on matter element analysis is established, the model can not only diagnose the development level of power grid, but also determine the key factors that affect the diagnosis results, and give suggestions for improvement. The practical example verifies the feasibility and rationality of the method, which has good evaluation accuracy and prediction effect.

scholarly journals Evaluation method of clean power grid development mode

2021 ◽  
Vol 236 ◽  
pp. 02002
Author(s):  
Bingqi Jiao ◽  
Zhicheng Xu ◽  
Kuan Zheng ◽  
Xiaoqing Yan ◽  
Junshu Feng
Keyword(s):  
Evaluation Method ◽  
Power Grid ◽  
Clean Energy ◽  
Power Grids ◽  
Analysis Method ◽  
Development Mode ◽  
Grid Construction ◽  
Development Evaluation ◽  
Relative Change

In response to the climate change, it has been becoming the consensus of most countries in the world to accelerate the development of a high proportion of clean energy. The power grid is the core to support the development of a high proportion of clean energy, and the key is to accelerate the construction of clean power grids. This paper focuses on the main characteristics of clean power grid construction, and proposes a set of clean power grid development evaluation indicators including 5 first-level indicators and 19 second-level indicators and an analysis method based on radar charts. Taking China Power Grid as an example, this paper analyzes in detail the characteristics of the medium and long-term development mode of clean power grids and the relative change trends of specific indicators, and discusses the key links and potential problems that need attention in the development of clean power grids.

scholarly journals Evaluation on the Stability of Vertical Mine Shafts below Thick Loose Strata Based on the Comprehensive Weight Method and a Fuzzy Matter-Element Analysis Model

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Wenquan Zhang ◽  
Zaiyong Wang ◽  
Jianli Shao ◽  
Xianxiang Zhu ◽  
Wei Li ◽  
...  
Keyword(s):  
Comprehensive Analysis ◽  
Structure Parameters ◽  
Analysis Method ◽  
Analysis Model ◽  
Element Analysis ◽  
Good Reliability ◽  
Matter Element Analysis ◽  
Weight Method ◽  
The Stability ◽  
Seam Mining

Damage to mine shafts located below thick loose aquifers, caused by coal seam mining, can seriously affect the operational safety of mines. In view of such a problem, the comprehensive weight method and the fuzzy matter-element analysis method were used to analyze and evaluate the stability of mine shafts below thick, loose aquifers. Based on data relating to shaft structure parameters collected from fifteen damaged shafts in coal mines in East China, a comprehensive analysis was performed. The results showed that (1) the two indexes of surface subsidence velocity and water level drop value at the bottom of a loose aquifer have a large influence on the stability of shafts below thick loose aquifers, and (2) the predicted results of thirteen sets of samples were the same as the results measured during actual production; the accuracy of the model was 86.67%. The comprehensive weight method and the fuzzy matter-element analysis model both show good reliability for evaluating the stability of mine shafts below thick loose aquifers and can provide a scientific reference for the analysis of the stability of mine shafts in areas with thick loose strata, as well as for the design of comprehensive control plans that could subsequently be implemented.

Eco-Environmental Assessment of the Low Hilly Area Based on Matter-Element Analysis Method: A Case Study of Pingdingshan City, China

2014 ◽  
Vol 1051 ◽  
pp. 536-541
Author(s):  
Chang Li Yu ◽  
Hai Long Yu ◽  
Yu Bo Wang
Keyword(s):  
Scientific Basis ◽  
Analysis Method ◽  
City Center ◽  
Element Analysis ◽  
Environmental Evaluation ◽  
Environment Quality ◽  
Matter Element Analysis ◽  
Data Source ◽  
Further Development

On account of the ambiguity of the concept of eco-environmental quality and the incompatibility of evaluation, the paper takes regional eco-system as "Natural - Economic - Social" complex, with the using of Matter-element Analysis Method, selects the 2012 statistics data source of the study area, gives an effective eco-environmental evaluation of the hilly areas in Pingdingshan city by the calculating of Euclid approach degree. The evaluation results show: Euclid approach degree ρHj (City center) >ρHj (Lushan) >ρHj (Ruzhou) >ρHj (Baofeng), while the number is between 2 and 3. It showed that the eco-environment quality in Pingdingshan hilly areas is good, waiting for further improvement. It offers the scientific basis and countermeasures for the restoration and further development of the eco-environment in this area.

Mathematical Optimization of Monitoring Stations for Atmospheric Environment in Taiyuan City, Shanxi Province, China

2012 ◽  
Vol 518-523 ◽  
pp. 1556-1560 ◽  
Author(s):  
Yu Zhang ◽  
Yu Long Yan ◽  
Qiu Sheng He
Keyword(s):  
Atmospheric Pollution ◽  
Mathematical Optimization ◽  
Atmospheric Environment ◽  
Shanxi Province ◽  
Analysis Method ◽  
Element Analysis ◽  
Daily Monitoring ◽  
Matter Element Analysis ◽  
Central Station ◽  
Particulate Matter Pollution

Based on some daily monitoring date from Taiyuan Environmental Monitoring Central Station during Dec 2008 to Nov 2009, the atmospheric pollution situation of Taiyuan was evaluated. The results showed that: the concentration of SO2、NO2 and PM10 in Taiyuan was 0.0228 mg/m3、0.0198 mg/ m3 and 0.1051mg/ m3，and the inhaled particulate matter pollution is Primary contamination. In the end, the original monitoring sites have been optimized by matter element analysis method. The atmospheric pollution situation of Taiyuan can be detected accurately after the number of monitoring sites was optimized from eight to five.

Sustainable Utilization Evaluation on Water Resources Base on Matter Element Analysis in Huaibei City

2012 ◽  
Vol 610-613 ◽  
pp. 2671-2674
Author(s):  
Yang Gao ◽  
Hong Mei Zhang ◽  
Guo Wei Xu ◽  
Hai Min Su ◽  
Yong Zhang
Keyword(s):  
Water Resources ◽  
Evaluation Index System ◽  
Sustainable Utilization ◽  
Analysis Method ◽  
Element Analysis ◽  
Water Resources Development ◽  
Matter Element Analysis ◽  
Development And Utilization ◽  
Water Resources Sustainable Utilization ◽  
Resources Development

The evaluation index system of water resources sustainable utilization was constructed according to the actual situation of water resources development and utilization in Huaibei City, using the matter element analysis method, analyzed water resources sustainable utilization. The results showed that water resources sustainable utilization status were significantly different in different areas of Huaibei City. The potential of water resources development and utilization was great in Suixi County. The water resources developments of Duji District and Lieshan District have a considerable scale, but there were still some potential for the development and utilization. The degree of water resources utilization was large and water resources carrying capacity was saturated in Xiangshan District. The evaluation result showed that using the matter element analysis method in comprehensive evaluation of water resources development and utilization was feasible.

Influence of Dropper Spacing on Quality of Pantograph-Catenary Current Collection

2014 ◽  
Vol 654 ◽  
pp. 78-81 ◽  
Author(s):  
Mei Li Yu ◽  
Wen Zheng Liu ◽  
Jian Zhang ◽  
Cai Ying Yan
Keyword(s):  
Contact Force ◽  
Analysis Method ◽  
Key Factors ◽  
Element Analysis ◽  
Factors Affecting ◽  
Contact Wire ◽  
Current Collection ◽  
Negative Effect ◽  
The Stability

Elasticity variations in railway overhead contact line would lead to the fluctuation of contact force between pantograph and contact wire and produce a negative effect on the stability of current collection. Dropper distribution is one of the key factors affecting the elasticity of the contact wire. In this paper, the influence of dropper spacing on elasticity and quality of current collection have been studied using finite element analysis method by simulation. By analyzing the changes of elasticity value and contact force under different conditions of dropper distribution, the effect laws of dropper spacing on the contact wire elasticity and the quality of current collection under the speeds of 300km/h, 350km/h and 400km/h have been obtained.

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