scholarly journals LNMR Study on Microstructure Characteristics and Pore Size Distribution of High-Rank Coals with Different Bedding

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Jiajia Liu ◽  
Jianmin Hu ◽  
Mengqi Shen ◽  
Ming Yang ◽  
Yingxiang Fang
Keyword(s):  
High Rank ◽  
Gas Extraction ◽  
Double Peak ◽  
Large Hole ◽  
Structure Characteristics ◽  
Microstructure Characteristics ◽  
Bedding Angle ◽  
T2 Map ◽  
Correlation Degree ◽  
The Relationship

In order to study the pore structure characteristics of high-rank coals with different bedding, NMR experiments were carried out for high-rank coals with different bedding angles (0°, 30°, 45°, 60°, and 90°). The results show that the distribution of T2 map of high-rank coal with different bedding is similar to some extent, showing a double peak or triple peak distribution, and the first peak accounts for more than 97% of the total, indicating that small holes are developed in high-rank coal with different bedding, while macropores are not developed. The influence of bedding angle on the fracture proportion is less than 0.3%. Compared with the fracture proportion, the effect of bedding angle on the proportion of microhole, medium hole, and large hole is greater and presents a certain rule. There are certain differences in T2 cutoff value (T2C) of high-rank coal with different bedding. The relationship between bedding angle and T2C conforms to exponential function, and the correlation degree R2 is 0.839. The research results provide a theoretical basis for gas extraction and utilization and prevention of gas disaster in coal mines in China.

Research on the Dilemma and Path of Rural Industry Integration and Internet Revitalization Driven by E-commerce

2021 ◽  
Vol 7 (5) ◽  
pp. 4163-4171
Author(s):  
Feng Xu
Keyword(s):  
Internet Technology ◽  
The Internet ◽  
Development Mode ◽  
Rural Industry ◽  
Effective Strategies ◽  
Correlation Degree ◽  
New Development ◽  
Two Factors ◽  
Industry Integration ◽  
The Relationship

The emergence of Internet technology provides a new development mode for the development of rural industry. In view of the fact that the rural integrated Internet is in its infancy, and the unpredictability and uncertainty of “Internet +” innovation in the era of “digital economy”, the development of rural integrated Internet is facing many challenges, and there are development misunderstandings and dilemmas. This paper studies the dilemma and path of rural industry integration and Internet revitalization driven by e-commerce. Driven by e-commerce, this paper analyzes the current situation of the Internet revitalization of rural industry integration, summarizes the problems existing in the Internet revitalization of rural industry integration, constructs a grey correlation model to analyze the correlation degree of the influencing factors in the rural industry and Internet integration, and takes a certain rural industry as an example to prove that the model can be used to analyze the relationship between the two factors On this basis, the paper puts forward the effective strategies of rural industry integration and Internet revitalization driven by e-commerce.

Determination of the correlation relationship between irrigation and distribution of agricultural lands

2021 ◽  
Vol 07 (02) ◽  
pp. 29-35
Author(s):  
Kamil Zakir oğlu İbrahimli ◽  
Keyword(s):  
Key Words ◽  
Statistical Method ◽  
Negative Correlation ◽  
Agricultural Lands ◽  
Correlation Relationship ◽  
Positive Correlation ◽  
Correlation Methods ◽  
Correlation Degree ◽  
The Relationship

The importance of the statistical method is great in the study of natural and economic processes. It is possible to conduct analyzes and obtain results with the help of this method. Sometimes phenomena and processes co-exist and develop interdependently. In this case, it is necessary to determine the relationship between them, to express this relationship. Key words: perfect positive correlation, perfect negative correlation, direction of correlation, degree of correlation, methods of calculating correlation, Spearman᾽s method

Grey relational analysis on the land-sea economy in China

2017 ◽  
Vol 7 (1) ◽  
pp. 31-44 ◽  
Author(s):  
Xue Jin ◽  
Kedong Yin ◽  
Xuemei Li
Keyword(s):  
Weak Type ◽  
Land Area ◽  
Causality Test ◽  
Relational Schema ◽  
Content Type ◽  
Correlation Degree ◽  
Marine Economy ◽  
Grey Correlation Degree ◽  
Grey Relational ◽  
The Relationship

Purpose On the basis of the time series of the land area economy and marine economy data during 1996-2015, the authors study the relationship between land area economy and marine economy, and divides the relational schema of the land-sea economy by doing causality test of land-sea economy, grey correlation degree analysis and relational schema analysis of the land-sea economy in coastal provinces and cities. The paper aims to discuss these issues. Design/methodology/approach The paper uses methods such as Granger causality test and grey correlation degree analysis to preliminarily demonstrate the relationship of land-sea economy. Findings With Granger causality test, we can draw that there is a causal relationship between the land area economy and marine economy. Further with the relational schema analysis, we can draw that the relationship between marine economy and land economy in 11 coastal provinces and cities can be summed up into four kinds of patterns such as land-sea weak type, land-sea strong type, sea strong land weak type and land strong sea weak type. Practical implications For the government and related disaster management departments, when policies are made and relevant measures are taken in the process of planning economic layout of land-sea economy, similar policies or measures may be taken for the same type of provinces, in order to improve administrative efficiency. Originality/value The development and utilization between land economy and marine economy has a certain contradiction, which must be balanced to realize the balanced development of land economy and marine economy. Therefore, it is necessary to comprehensively assess the grey relational analysis of land-sea economy, in order to provide the basis for reasonable policies.

scholarly journals Microstructure Characteristics of Self Compacting Concrete using Sea Water

2018 ◽  
Author(s):  
erniati ◽  
muhammad wihardi tjaronge ◽  
Rudy Djamaluddin ◽  
Victor Sampebulu
Keyword(s):  
Compressive Strength ◽  
Sea Water ◽  
Concrete Strength ◽  
Infrastructure Development ◽  
Self Compacting Concrete ◽  
Microstructure Characteristics ◽  
Dense Microstructure ◽  
Water Curing ◽  
The Relationship ◽  
Mixing Water

In the cycle of life, the needs of freshwater more and more. Infrastructure development is increasing. On the concrete industry, several billion tones of water used in earth as mixing water, treatment water (curing) and cleaner water every year, where using of sea water is obstructed. For that, the using of sea water which consists of 97% of the total water on earth is absolutelynecessary. Self-compacting concrete (SCC) has dense microstructure. Knowledge about the microstructure and properties of each component a concrete and their relationship is useful to control the behavior. This research aims to know the relationship between compressive strength and microstructure characteristics of Self Compacting Concrete which using seawater up to the age of 90 days. The results of this study were the compressive strength of SCC using sea water is higher than the SCC using fresh water. Seawater does not reduce the strength of SCC concrete until the age of 90 days, but instead of Seawater is accelerating the development of SCC concrete strength at an early age. The compressive strength of concrete SCC is influenced by the phase microstructure (especially with tobermorite and portlandite) formed in the concrete.

Study on the Relationship between Soil Nutrients and the Corn Yield Based on Grey System Theory

2015 ◽  
Vol 733 ◽  
pp. 391-394
Author(s):  
Xing Mei Xu ◽  
Li Ying Cao ◽  
Jing Zhou
Keyword(s):  
System Theory ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Grey System Theory ◽  
Available Phosphorus ◽  
Corn Yield ◽  
Grey System ◽  
Correlation Degree ◽  
Soil Nutrient Content ◽  
The Relationship

Take the test zone 110 sampling plots of soil nutrient content as the research data, to study the correlation between the soil nutrient content and the corn yield. It used the grey system theory to analysis the correlation between the content of soil nutrient, and established GM (1, N) prediction model. Soil nutrient correlation degree analysis showed that the correlation coefficient of available phosphorus and available potassium were 0.4742, 0.4492, it has a significant effect on the corn yield, the average prediction error of the GM (1, N) model was 7.38%. The model reflected the relationship between soil nutrient content and the corn yield well; it can be used to predict the yield test area.

Analysis of Texture Formation and Microstructure Characteristics of Cold Rolled IF Steel Sheets

2005 ◽  
Vol 495-497 ◽  
pp. 411-416
Author(s):  
Y.X. Cai ◽  
Y.D. Liu ◽  
Yi Nong Wang ◽  
Gang Wang ◽  
Yan Dong Wang ◽  
...  
Keyword(s):  
Interstitial Free ◽  
If Steel ◽  
Texture Formation ◽  
Dislocation Wall ◽  
Microstructure Characteristics ◽  
Steel Sheets ◽  
Transmission Electron ◽  
Cold Rolled ◽  
The Relationship ◽  
Characteristic Microstructure

The aim of this work is to investigate the relationship between the deformation microstructure and texture in cold rolled Interstitial Free (IF) steel sheets. In the present research, the cold rolled IF steel sheets with 10%-50% reductions are used to observe the characteristic microstructure and individual orientations by transmission electron microscopy (TEM) and SAED patterns. The experimental results on inter-granular strain homogeneity and dislocation wall formation are given in details in this paper. The results are explained by the analysis of crystallographic gliding and are helpful to improve the prediction of cold rolling textures.

scholarly journals A Calculation Theory of Earth Pressure Considering Microstructure of Porous Materials

2018 ◽  
Vol 142 ◽  
pp. 02010
Author(s):  
Jun-hu Li ◽  
Chao Zhang ◽  
Wei Xue ◽  
Wen-chao Zhang ◽  
Ri-qing Xu
Keyword(s):  
Contact Area ◽  
Soft Clay ◽  
Stress Transfer ◽  
Earth Pressure ◽  
Transfer Principle ◽  
Lateral Stress ◽  
Microstructure Characteristics ◽  
Pressure Calculation ◽  
The Relationship ◽  
Scanning Electron

To explore a more reasonable earth pressure calculation theory, microstructure characteristics of soft clay in Hangzhou, Ningbo and Wenzhou had been observed using scanning electron microscope (SEM) and were quantitatively analysed using Image-Pro Plus (IPP) software. The relationship between porosity and contact area of soft clay was got by considering the microstructure. Combining soil lateral stress transfer principle, a calculation theory of earth pressure considering soil contact area was got. The possible reason of the differences between earth pressure and the actual monitoring earth pressure was analysis by the case.

The Gray Relation Analysis of Non-Coal Mine Accidents Causation

2014 ◽  
Vol 989-994 ◽  
pp. 2306-2309
Author(s):  
Xiang Yun Meng ◽  
Ri Hui Chen ◽  
Shi Bin Wang
Keyword(s):  
Coal Mine ◽  
Accident Risk ◽  
Related Factors ◽  
Correlation Degree ◽  
Gray Relation Analysis ◽  
Relation Analysis ◽  
Mine Accident ◽  
Grey Relational ◽  
Relational Order ◽  
The Relationship

The Gray Relation Analysis is applied to the casualty analysis of non-coal mine accident in four certain years in China to export grey relational order to determine the main related factors in the non-coal mine accident, obtaining quantitative analysis results of the relationship between non-coal mine accident and multiple factors, introducing the concept of mine accident risk correlation degree.

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