bluuebunny/crossref_metadata_2025_split huggingface dataset:
Distribution Characteristics and Enrichment Factor Gallium in Coal Seam No.4 in Majialiang-Fangziping area, Fugu mining area
Authors: Wang Wenbo , Wang Hui , Fan Yuhai , Bao Zhihong , Pan Chunjuan 
Published: July 2020

Abstract
Based on the latest exploration data in the study area, the distribution of gallium in the 4 coal seams in Majialiang Fangping area of Fugu mining area and its geological influencing factors are analyzed. The results show that the weighted average mass fraction of gallium is 18 μg/g, which is 1-4 times higher than the global average. The yield of ash and the content of SiO2 and Al2O3 in coal ash are positively correlated with the content of gallium in coal. The content of total sulfur, organic sulfur, Fe2O3 in coal ash and the index of ash composition have negative correlation with the content of gallium in coal. These characteristics indicate that the mineral carrier of gallium in coal is mainly clay mineral, and the peat swamp with strong hydrodynamic force and weak reducibility may be conducive to the enrichment of gallium in coal.
Study on automatic recognition method of continental shale lamination based on electrical imaging logging
Authors: Wang Min , Lai Fuqiang , Fu Aibing , Hu Xingzhong , Zhong Lulu , Zhang Guotong 
Published: July 2020

Abstract
In this paper, the shale oil shale stratum in Jiyang Depression is taken as the object to study the characteristics of the complex shale lithology, the frequent development of calcareous or sandy stratum, and the difficulty of manual identification. Firstly, the development characteristics of the stratigraphic layer of continental shale oil reservoir are studied. Then the electric imaging logging image is processed to restore the whole borehole wall, and then the target geological object is extracted through the operations of automatic image segmentation, connected area labeling, area contour tracking extraction and storage. Finally, the target geological objects are automatically classified and identified, the location of the continental shale texture layer is predicted, and the texture layer development index is calculated. The research results show that: after verification analysis with the core description, this method can identify the texture layer more accurately, and the coincidence rate reaches 92%. It provides support for the identification of stratigraphic facies favorable for reservoir development in the study area, and also lays a foundation for shale oil layer selection and fracturing.
Performance Analysis of Cumulative Sum Control Charts Based on Parameter Estimation
Authors: Chen Dongyang , Liu Xiaokang , Yang Hang 
Published: July 2020

Abstract
As an important means of quality monitoring, Cumulative Sum (CUSUM) control charts can quickly detect whether the production process is out of control. However, in the actual production process, the parameters required for the control chart-the overall mean and standard deviation are usually unknown, so it needs to be accurately estimated. This paper uses multiple estimators to estimate the mean and variance of the population by using samples in phase I. When the testing process in phase II is out of control, this paper analyzes the influence of each estimator combination on the cumulative sum control chart based on running length distribution of control charts. This paper comprehensively analyzes the average, standard deviation and percentile of the control chart running length in four different environments in order to find the parameter combination that optimizes the control chart performance. The research results show that the CUSUM control chart based on

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Evaluation of cultivability of reclaimed soil in hollow villages in mountainous and hilly areas
Authors: Lei Na , Liu Zhe , Dong Qiguang 
Published: July 2020

Abstract
Reclaimed soil in hollow villages can be used to supplement cultivated land resources. In this study, reclaimed soil in hollow villages in Chengcheng County was selected as research object, and a combination of field investigation and indoor analysis was used to evaluate the cultivability of the reclaimed soil. Specific indicators for evaluation were borrowed soil thickness, Physical and chemical properties of soil, design of piece of farmland, crop growth indicators, convenience of farming, irrigation conditions, the mechanization degree. The research results have important reference significance for evaluating the quality and cultivability of the reclaimed soil.
Meteorological risk identification and assessment of offshore wind farms
Authors: Jiao Xue , Xing Hongyan , Zhang Qilin , Zhou Junchi 
Published: July 2020

Abstract
During the construction and operation period, an offshore wind farm is exposed to a variety of meteorological threats, which could lead to severe damages and massive financial loss. In this work, we analyse meteorological risks of offshore wind farms in the coastal areas of the south-east Jiangsu Province. Firstly, we identified the risk factors through the Delphi Method and analysis of historical data. The five major risks include typhoon, lightning, extreme temperatures, salt frog, and oceanic disasters caused directly by meteorological disasters. Then, using the Analytic Hierarchy Process (AHP), we established index module of each layer and calculated the risk value of each influence factor. After that, we established the judgement matrix and the weight of each factor. Based on that, we got the comprehensive risk value and considered it as a medium risk. According to the weighting module, we also came to the conclusion that typhoon contributes most to the meteorological disaster of offshore wind farms, with a weight of 0.3937.
Research on Environmental Green Ecological Technology Based on Agricultural Pollution in Yunnan
Authors: Tang Jinli 
Published: July 2020

Abstract
This article constructs a multi-dimensional and multi-agent participation model for agricultural environmental pollution from the perspective of interest-related theory, and uses Yunnan Province as an example to fully explain this problem. With the help of literature analysis and statistical analysis, based on a comprehensive understanding of domestic and foreign agricultural environmental pollution and governance issues, relevant stakeholder theories and the state of agricultural environment in Yunnan Province, based on the theory of stakeholder theory, a government, Eco-environmental engineering aims to protect, improve and continuously use the existing ecological resources, thereby promoting the coordinated development of ecology, economy and society. Based on this, by exploring the impact of ecological and environmental engineering on agriculture in terms of natural resources, environment, economy, society, and science and technology, the agricultural ecological balance is transformed and constructed to achieve the purpose of promoting sustainable agricultural development.
Research on Application of Environmental Protection Dredging Construction Technology in Environmentally Sensitive Areas
Authors: Hu Shenghua , Shi Shile , Xue Qiang , Wang Yisen 
Published: July 2020

Abstract
At present, there are few cases about the implementation of environmental protection dredging project in China’s environmentally sensitive areas, and there is a serious lack of relevant project implementation experience. This paper combines the basic characteristics of environmental dredging in environmentally sensitive areas, and takes Xiangyang City’s moat dredging project as an example to analyze the difficulties in the implementation of the project, mainly including the control of construction impact, compliance with schedule, prevention of secondary pollution, and sludge. In order to solve these problems, the project mainly adopts targeted measures to minimize the impact of project construction; in order to realize the scheduled implementation of the sludge disposal mode using 6000m3 of daily dredging and dredging combined with the industrialization mode; The project successfully prevented potential secondary pollution risks during construction through the use of environmentally friendly cutter heads, integrated ultra-magnetic separation equipment and specialized sludge conditioning agents; finally, the combined use of soil improvement soil outside the mud cake and landfill for external transportation successfully solved the silt digestion problem of the project. At the same time, through the pilot test of sludge resource utilization, two major soils for mud cake production engineering and landscaping were developed Process products lay a solid foundation for the multi-channel comprehensive utilization of sludge.
Pollution Characteristics and Comprehensive Evaluation of Soil Organic Compounds at a Chemical Contaminated Site
Authors: Wei Yulu , Wang Luyao 
Published: July 2020

Abstract
Urban soil is one of the main components of urban ecosystem. Taking organic pollution in a chemical plant after relocation as the research object, which is left behind by a chemical plant after relocation, 13 deep soil samples were collected. According to the requirements of “Soil environmental quality Risk control standard for soil contamination of development land” (GB36600-2018), 43 organic contents were tested and analyzed. Mass ratio statistical analysis, single pollution index method and Nemerow synthetic evaluation index were used to analyze the organic pollution in the site. Results show that chloroform, benzene, trichloroethylene (TCE), 1,2-dichloropropane and 1,2,3-trichloropropane were significantly enriched in the reactor and the sewage pool, and the pollution depth was up to 10m. This shows that the chemical plant has a great impact on the site, and there may be leakage or stolen discharge, which is also an important source of soil organic pollution in this area, so detailed monitoring and remediation work should be carried out in the later stage.
Rural Construction and Ecological Environment Optimization in Northwest China Based on Sustainability
Authors: Liu Siqi , Huang Guanqi 
Published: July 2020

Abstract
With the rapid development of rural urbanization, rural areas, especially in northwest China, have been exposed many problems. Living quality cannot be guaranteed. Environmental quality is deteriorating. Rural development has encountered the unprecedented problems and challenges. Under the background of the integration of urban and rural areas, the development of rural areas is also in a dilemma. In this research, based on the actual situation of Guanzhong region in Shaanxi Province, the rural villages are classified according to their resources, environment and formation time. At the same time, combined with previous literature, a group of villages has been selected as object to conduct on-site investigation and analysis including ecological environment, planning layout, public space, building energy saving and so on. Hopefully, the analysis of physical formation can makes people have a more in-depth understanding of sustainability. We are going to understand the problems encountered and solutions related in the sustainable development of rural areas from a critical perspective. By putting forward the corresponding strategies and development focus, a set of multiple sustainable development model for different types of villages has been summarized and proposed. Importantly, it can be some enlightenments for further studies.
Study on Microclimate Improvement in Urban Fringe based on Human Comfort--Taking Shichuan River as an Example
Authors: Liu Siqi , Peng Biao 
Published: July 2020

Abstract
In the context of rapid urbanization, the development of cities has produced many environmental problems. The social structure of urban fringe is complex and the environment is deteriorating. In recent years, urban environment improvement activities have been carried out all over in China, improving the quality of ecological environment and residents’ happiness. Taking Shichuan River, Fuping County, Shaanxi Province as an example, this study researches the methods and strategies used in the environmental improvement project of Shichuan River were integrated and analysed, and improves the quality of ecological environment through engineering and technical measures. In this study, by setting different data collection points, the humidity of sampling points at different distances around the Shichuan river was analyzed; the wind speed and other data of the study area were collected, and the regional wind environment was simulated by 3D modelling. The microclimate of the Shichuan river is evaluated by the methods of qualitative and quantitative analysis. This study aims at emphasizing the importance of ecological construction. It provides a positive reference for the improvement of ecological environment in the urban fringe of Northwest China
Study on Long-term Operating Mechanism of Rural Drinking Water Projects in Southwest Mountainous Areas
Authors: Dai Chunyao , Min Zhihua , Zhang Junhong 
Published: July 2020

Abstract
The rural drinking water project is an important manifestation of building a new socialist countryside and a policy of benefiting the farmers to improve the quality of life. However, there are many problems in the operation and management of rural drinking water projects, including incomplete management systems, inadequate drinking water quality, and unreasonable collection of water charges. These problems are not conducive to the long-term operation of drinking water projects. This article proposes the corresponding management measures aiming at the above problems in the operation and management of rural drinking water projects.
China’s sewage treatment industry status quo and improvement measures
Authors: Fu Jianru 
Published: July 2020

Abstract
Sewage treatment has greatly affected the promotion and implementation of China’s sustainable development policies. At this stage, urban domestic and industrial wastewater discharge has become the main source of pollution for urban water resources in China. Urban domestic and industrial wastewater treatment is the top priority for saving water resources and protecting urban water bodies both now and in the future. This article analyzes the current status of China’s sewage treatment from three aspects: policy, process, and industry operation status. It finds problems in China’s sewage treatment, and puts forward reasonable suggestions.
Short-term wind power prediction based on EMD-LSTM combined model
Authors: Zhang Fei , Guo Zimeng , Sun Xiaohui , Xi Jia 
Published: July 2020

Abstract
In recent years, China is actively developing wind power generation. Wind energy is a natural factor with volatility, variability and uncontrollability, which will cause fluctuations in wind farm output. The accurate prediction of wind power is conducive to grid dispatchers deploying scheduling plans or doing ahead of schedule Adjustments to reduce losses to a certain extent are also conducive to improving wind power grid-connected capacity. In this paper, using the advantages of empirical mode decomposition EMD algorithm in nonlinear and non-stationary data processing, a wind farm power prediction model based on EMD-LSTM is established. First, the relevant data is preprocessed to obtain the ideal input sequence, and the LSTM network model is used. The NWP wind speed is corrected first, and the revised forecasted NWP wind speed sequence is closer to the actual wind speed. Then use EMD to decompose the wind power data sequence into data components of different scales, and then use the LSTM long and short-term memory network to model the decomposed IMF components and residual RES respectively, and sum the prediction results of each component and residual As the final prediction result. The research results show that the method described in this paper effectively improves the prediction.
Structural Lightweight Research of Module in EV Lithium_ion Battery Pack
Authors: Yang Yuedong , Xiong Fei , Liu Jing , Jia Yinglong , Ma Zhengwei 
Published: July 2020

Abstract
As the lightest metal material in engineering application, magnesium alloy has widely prospect. In this paper, magnesium alloy is considered to design structural parts of EV lithium ion module in order to improve energy density and enhance mileage. Finite Element Models of modules in EV pack are established separately with aluminium alloy general used in EV pack and magnesium alloy AZ31B. The procedure of impact and random vibration in ABAQUS are analysed according to GB/T31647.3-2015. Compared results show that, single module decrease 0.82Kg and the energy density increase 13.4% with the performance of impact resistance and random vibration resistance better. The feasibility and lightweight effect using magnesium alloy in EV modules industry are proven. It can provide research direction for structural lightweight, energy density increasing and mileage enhancing.
Noise Control of An Indoor Substation
Authors: Li Linyong , Zhou Yongyan , Li Li , Fan Xiaopeng , Zou Zhuanglei , Peng Lei 
Published: July 2020

Abstract
Noise measurement on transformers, substation boundary and noise-sensitive buildings of a 110kV indoor substation was carried out. The 1/3-octave band spectrums in different areas were analyzed, and was found that the transformer noise affects the substation boundary and noise-sensitive buildings. Taking ventilation and noise reduction into account, this paper proposes a noise control program. With this program executed, the noise reduction of north side of substation boundary is more than 9 dB in the daytime, more than 14 dB in the nighttime while it is 7.9 dB in the daytime, 8.6 dB in the nighttime in the residential building on the west side of the substation.
Research on New Energy-saving and Efficient Utilization of Buildings Based on Renewable Energy
Authors: Yang Zihao 
Published: July 2020

Abstract
Against the background of the increasing total energy consumption and the proportion of energy consumption in China, the energy crisis is intensifying. The application of renewable energy such as solar energy, wind energy and geothermal energy to building energy conservation is a major decision to solve the energy problem of buildings. The thesis combines the theories of green building evaluation standards, the problems facing the use of renewable energy, the value expression and use of renewable energy, and the impact of renewable energy on green building research. The influence of outdoor buried pipe layout and the arrangement of heat collector panels in the solar system on the feasibility research method in green building research, with a view to providing a certain reference for the subsequent research of new green residential projects in China.
Adoption of Power Electronic Converters Multi-Module Cascade System in Power Energy Circuit Control
Authors: Li Junhong 
Published: July 2020

Abstract
In order to solve the problem of system instability caused by power electronic converter in multi-module cascade operation in fields of smart grids and new energy, in this study, the impedance matching stability analysis of multi-module cascade system is presented. First, based on equivalent transfer function between the ideal input impedance and output impedance of submodule, the impedance matching stability analysis method of multi-module cascade system is put forward. Then, taking Buck circuit as an example, the two-terminal impedance model of Buck circuit is constructed, and the stability criterion of cascade system is given. Finally, the stability of single module and multi - module - cascade are analyzed. The stability analysis method proposed in this study shows that the single module system in Buck circuit has good input and output. The stability analysis of multi-module cascade system in Buck circuit shows that the impedance matching stability analysis method is feasible and correct. This study provides a good theoretical basis for the stability of the multi - module converter cascade system in power energy field.
Discriminatory analysis of spring water supply direction
Authors: Zhang Xinhui , Xing Liting , Zhao Zhenhua , Yao Chunmei , Xing Xuerui , Deng Zhong 
Published: July 2020

Abstract
In this paper,56 groups of underground water samples were collected in Baotu Spring Catchment, and a discriminant model was established to judge the recharge direction and aquifer of the four major spring groups. The results showed that Baotu Spring Group and Black Tiger Spring Group mainly recharge from southwest direction Ordovician karst water, Central south direction of Ordovician karst water respectively, and Five Dragon Pool Spring Group and Pearl Spring Group received from southwest direction and southeast direction Cambrian karst water supplement respectively. The research results are of great significance to the implementation of Jinan spring conservation and precise source replenishment measures. At the same time, it shows that the karst water system in northern China has the characteristics of uneven karst development.
Dust removal device for waterless solar photovoltaic panel
Authors: Zhou Yiheng , Xin Junzhe 
Published: July 2020

Abstract
With the rapid development of human science and technology, energy consumption is becoming increasingly severe, and solar energy, which is one of the clean energy in the future, has attracted wide attention. However, while solar photovoltaic power stations bring huge economic benefits, a huge problem about the cleaning and protection of solar photovoltaic power generation panels has also arisen [1]. The photovoltaic module is exposed to the air for a long time, and the dust falls on the surface of the photovoltaic module, blocking the light from entering, and reducing the light conversion efficiency of the photovoltaic module. It is urgent to deal with cleaning problems. This project intends to design a solar panel dust cleaning device that is mechanically cleaned by a brush and adsorbed by a chemical synthetic glue in the absence of water. To a large extent, it solves the problems caused by uncleaning, saves the use of water resources, and avoids the pollution of impurities brought by clean water washing.
Research on Substation Safety Online Monitoring Based on Fiber Bragg Grating Sensor
Authors: Tao Li , Yang Changjiang , Zhang Qi , Liu Jiaying 
Published: July 2020

Abstract
This article successfully applied fiber bragg grating sensors to multi-parameter online monitoring of various objects such as substation equipment and important structures, where using various types of sensors including static level, displacement meter, inclinometer and strain gauge to remotely monitor the safety status of substation equipment and important structures in real time. It is conducive to safe and stable operation of substations. The results show that the FBG sensor can realize the automatic and real-time measurement of multi-physical quantities in the substation safety monitoring. This technology provides data support for the substation disaster prevention and reduction, and has important practical application value.