bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Seepage mathematical model for fractured wells of coalbed methane reservoirs and the corresponding pressure response feature
Authors: Liu Chunchun , Zhang Cong , Xu Yanmei , Cui Xinrui , Huang Weigang , He Aigu , Wang Xiangyan , Liu Yishan , Wang Jigang 
Published: April 2021

Abstract
Coalbed fracturing is one of the important engineering and technical means of coalbed methane stimulation. To establish the seepage model of coalbed gas fracturing well is the key scientific problem to effectively evaluate the fracturing effect. Therefore, based on the micro pore structure of coalbed methane, this paper constructs the physical model of three porosity and two permeability, the mathematical model of seepage and the mathematical model of bottom hole pressure response, and analyzes the key factors affecting the dynamic response characteristics of pressure. The results show that diffusion coefficient, channeling coefficient, reservoir volume ratio and conductivity have different effects on the bottom hole pressure of the vertical well of three hole and two permeability fracturing. The results of this paper have certain guiding significance for the drainage and production capacity prediction of coalbed methane.
Analysis on Deep-Well Apparent Resistivity Measurement at Dabaishe Seismic Station
Authors: Ning Yaling , Lv Haijie , Xie Tao , Zhang Guoling 
Published: April 2021

Abstract
We interpret the horizontally layered homogeneous medium model of Dabaishe station according to the electric sounding data. The measurement array at the station is the fixed Schlumberger arrays. The deep-well measurement has two set of arrays. One is horizontally placed under 100 meters, and the other is vertically arranged. Under the layered model, we analyze the sensitivity coefficient variations of deep-well apparent resistivity measurement versus the different electrode depth and the spacing of current electrodes. The results show that the horizontal deep-well measurement has well ability on inhibiting disturbances from surface. However, its current electrodes spacing is relatively short, only 60 meters, thus the measurement data cannot effectively reflect the resistivity variations from deep mediums. Electrodes of the vertical deep-well measurement array locate within the layer where underground water level changes. Therefore, its measurement data suffers great affection from the water level variations and it is very difficult to distinguish the resistivity variations of deep mediums from the data. In order to better detect information associated with earthquakes, the spacing of horizontal arrays of AB/2 should be set as 250-350m, and the bury depth exceeds 150m. A Horizontal array along NS direction is also recommended.
On Developing Sightseeing Agriculture in Poyang Lake Eco-Economic Zone
Authors: He Jianbo , Wang Zhen 
Published: April 2021

Abstract
Sightseeing agriculture is no doubt the best choice that can preferably overcome the scientific development mode featured in “population-resources-environment” contradiction and gradually realize the agricultural sustainable development, which will become the strong support for the realization of the strategic target of Poyang Lake Eco-economic Zone. Poyang Lake region should seize the rare opportunity that our country is establishing the Poyang Lake Eco-economic Zone and developing the low-carbon economy in force. Meanwhile, it also should make full use of its advantages in resources to combine spatial layout and other industry development for the preferential policies and measures in a more active way and innovate and explore effective ways to promote ecological agriculture development in Poyang Lake.
Ancient and Famous Trees Risk Assessment in Changting Based with Multi-Level and Multi-Dimensional Indicator System
Authors: Lan Yuxiang , Lin Yingfang , Liu Fan , Chen Han , Li Junyi , Chen Ye , Dong Jianwen 
Published: April 2021

Abstract
According to the results of the second census of ancient and famous trees and field investigation in Changting County, Through VTA method and AHP method, the multi-level and multi-dimensional evaluation index system of risk degree of ancient and famous trees was constructed. The results show that: The higher weight of growth factors are the main trunk diseases and insect pests, abnormal cracks in the main trunk, hollow trunk, branch diseases and insect pests, abnormal cracks in the branches, dangerous dead branches, root diseases and insect pests, leaf diseases and insect pests. The growth space of tree roots is the most important factor in environmental factors. Among the anthropogenic factors, the most important ones are the artificial dumping of pollutants and the lack of professional management. Hazard index of Taxus chinensis var. mairei is maximum, followed by Schima superba, Cinnamomum camphora and Liquidambar formosana. The most dangerous indicators are the professional level of managers, lack of professional management, V-angle trunk and plant parasitism. Through the risk assessment, this paper seeks for the key points of management and protection of ancient and famous trees, aims at solving problems and reducing the risk of ancient and famous trees, so as to promote the management and protection of ancient and famous trees.
A Comparison Study on Species Diversity of Woody Plants in Mountain Parks and Riverside Parks of Fuzhou City
Authors: Lan Yuxiang , Liu Fan , Lin Yingfang , Chen Han , Li Junyi , Chen Ye , Dong Jianwen 
Published: April 2021

Abstract
In order to know the situation of plant diversity of mountain parks and riverside parks in Fuzhou city, the woody plants of different mountain parks and riverside parks in Fuzhou city were studied in this paper. The typical sampling method was used in this survey. Then the composition of plant community, the origination of plants and the species diversity index were analyzed to explore the differences of plant diversity between different types of parks. The research was aimed to provide basic data for the biodiversity conservation in Fuzhou city. The results showed that the species of woody plants of mountain parks and riverside parks was abundant, the similarity of the composition of plant community is extremely high, the number of woody plant species and the application proportion of native tree species of mountain parks was higher than that of riverside parks. The abundance index and the Shannon-Wiener index of tree layer of mountain parks was higher than that of riverside parks. The abundance index and the Shannon-Wiener index of shrub layer of mountain parks was lower than that of riverside parks.
Research and application of sports health system based on Block Chain Technology
Authors: Wang Minghao , Wu Shaofei 
Published: April 2021

Abstract
With the continuous development of block chain technology, people realize that this trusted underlying mechanism has important practical significance as the foundation of various activities. This paper combines block chain technology with sports health system, and improves it based on Ethereum system. In the traditional block chain system, the time to generate blocks is too slow and the centralization problem is caused by the large asset gap. We propose the concept of surplus advantage of account to determine which account has more power to generate the new block in the block chain. In this way, users of the system can maintain the system, which can further ensure the security of the whole system and the authenticity of data information, and greatly improve the efficiency of the whole system. And we write smart contracts to make sure that things always follow the agreed rules. This will also make the whole sports health system has better security and credibility. With this block chain technology as the guarantee of the underlying technology, the sports health system can be more accurate, the relevant departments for the implementation and supervision of sports health subsidies, but also ensure the authenticity and security of the data information.
Research on the Intelligent Early Warning System for Metal Mine Mining Safety
Authors: Lin You 
Published: April 2021

Abstract
In order to reduce mine safety accidents and realize safe production, the mine safety early warning system was developed by studying the causes of accidents, using Python as the development language, using Web network technology and database technology. The paper uses the deployment of high-precision sensors and the development of a distributed management information system to realize the real-time collection and online monitoring of the monitoring index data of the metal mine; based on the accurately obtained key indicators such as the deformation displacement, the reservoir water level, and the depth of the infiltration line, it is safe for the metal mine Multi-level early warning and forecasting of risk conditions are implemented. The actual operation of the system shows that the integrated management system can provide decision-making basis for regional safety management.
Land use type dominates soil microbial element limitations in a subtropical plateau, China
Authors: Ding Leilei , Wang Puchang , Zhang Yu , Zhang Yujun , Liu Jiajia , Zhao Lili 
Published: April 2021

Abstract
Land use type, vegetation type (artificial or natural) and microbes play a key role in flux of soil matter and energy in subtropical ecosystems. However, microbial element limitations in these ecosystems have been largely unexplored. Here, microbial element limitations under four representative land uses grouped into two vegetation types (artificial or natural) were characterized using enzymatic vector analysis, their drivers were deciphered using redundancy analysis in a subtropical region, Southwestern China. Enzymatic vector analysis showed that soil microbes suffered from carbon (C) & nitrogen (N) limitations in cropland and forestland related to artificial vegetation, but C, N & phosphorus (P) limitations in grassland and shrub land related to natural vegetation. Two-way ANOVA showed land use type and vegetation type (artificial/natural) were the major forces driving C and NP limitations. Redundancy analysis identified that soil total N was the major factor affecting soil microbial C limitation, soil total P was the major factor affecting soil microbial NP limitations. This study implied that conversion of natural vegetation to artificial vegetation would shift microbial element limitations from C, N & P limitation to C & N limitation, and exacerbate N limitation.
The Research on the Variation of Chlorophyll-a in Bohai Sea Based on MODIS Data
Authors: Cheng Yu , Zhang Shengjia 
Published: April 2021

Abstract
Chlorophyll-a (Chl-a) is an important parameter to characterize the degree of eutrophication in water. It has become an important index for water quality evaluation and is also one of the important water quality parameters that can be directly retrieved by remote sensing method. In this study, MODIS L1B data and OC3M Chl-a inversion model are used to invert Chl-a in the Bohai Sea from 2014 to 2019, the spatial and temporal variations of Chl-a in the Bohai Sea are investigated, and the influencing factors are analyzed. Results demonstrate that (1) the variations of Chl-a in different bays of the Bohai Sea have different trends. The Bohai bay and Laizhou bay show an upward trend, while the Liaodong bay and the central Bohai Sea show a downward trend. The concentration of Chl-a is related to the distance from the coast. The closer to the coast, the higher the concentration of Chl-a. (2) From 2014 to 2019, the overall concentration of Chl-a in Bohai Sea show a downward trend, the seasonal variation trend is relatively small, and the variation of Chl-a in spring is larger than that in summer and autumn. (3) River runoff and sea surface temperature will affect the variation of Chl-a, so the conc.
Innovative Research on Administrative Supervision in Colleges and Universities in the Information Age
Authors: Pan Yihui , Pan Yajing , Tu Keqin 
Published: April 2021

Abstract
The emergence of educational informatization has brought new development opportunities and challenges to the supervision work in Colleges and universities. The informatization construction of relevant supervision work has become an inevitable development trend. Therefore, in order to improve the teaching quality and promote the development of colleges and universities, it is necessary to focus on the analysis of its supervision work. Based on this, the article will start from the supervision work informatization, and put forward the corresponding supervision information innovation suggestions.
Numerical Simulation of Cooling Effect of Different Spray Water Temperature on Coal Face based on CFD
Authors: Zhang Cong , Zhang Ningning , Sun Xiangke 
Published: April 2021

Abstract
In order to effectively restrain the adverse effects of high temperature environment on the working area of fully mechanized coal mining face, a mathematical model describing the interaction between droplets and air flow was established and the accuracy of the model was verified. Finally, under the same ventilation conditions, the temperature distribution of the nozzle under different temperatures was studied in detail. The results show that the temperature distribution in different areas along the roadway is basically the same when the spray scheme is applied at different temperatures, and all of them decrease first and then increase. In all spray schemes, the best cooling effect is achieved by using K2.0 nozzle and spray water temperature of 278k.
Application and Research of New 3D Simulated Geological Structure in Training and Testing of Track and Field Athletes
Authors: Lu Changchun 
Published: April 2021

Abstract
Aiming at the modeling problem of numerical simulation under complex geomorphology and geological structure conditions, the paper proposes a modeling idea from part to the whole based on the 3D platform. It uses Brick and Tetrahedron units to generate 3D geological body models under complex geomorphic conditions through programming. The paper uses the interface to simulate the fault plane and combines with the trend plane to construct the strata in the fault’s upper and lower walls. It is believed that through mathematical analysis combined with computer programming, geological body modeling under complex geomorphology and geological structure conditions can be realized directly in the 3D platform. At the same time, the paper analyzes the relationship between track and field athletes’ physical training and the local geological environment.
Research on Sports System Based on The Concept of Green Environmental Protection
Authors: Meng Yalan 
Published: April 2021

Abstract
The thesis uses literature and questionnaire research methods to discuss a series of environmental problems caused by outdoor sports and the impact of environmental pollution on sports. Simultaneously, based on the concept of green environmental protection, corresponding environmental protection countermeasures are proposed to achieve a dynamic balance between sports and the natural environment, that is, to achieve veritable green sports.
Assessment of the standardized training residency Exposure Level and Concentration of the Indoor Microbial Aerosols in Hospital Buildings in Winter
Authors: Xiao Zhangbo , Sun Chang , Pan Chunyan , Lu Shanshan 
Published: April 2021

Abstract
In order to deeply analyze the pollution situation, distribution characteristics and exposure level of microbial aerosol in different functional buildings, the concentration, particle size distribution and resident exposure level of bacterial aerosol in different functional places of hospitals were studied in this paper. The results show that: 1) There are harmful environmental exposure and environmental health risks in the standardized training of residents in China, which need to be paid enough attention to improve their occupational environment. 2) the concentration level of indoor bacterial aerosol in various places of hospital in winter is outpatient hall > nurse station > doctor’s office > outdoor > general ward. 3) The median diameter of indoor bacterial aerosols in hospital buildings is smaller than that of outdoor ones, and there are differences in particle size distribution of indoor bacterial aerosols in different types of places. When indoor pollution sources are strong or indoor ventilation is poor, the particle size distribution characteristics of bacterial aerosols are mainly affected by indoor pollution sources.
Heterosis Analysis of Yield Characters of Waxy Maize Hybrid Jinuo 3
Authors: Qin Zongxing , Jia Xinyu , Jiang Long 
Published: April 2021

Abstract
TThe heterosis of high yield maize variety Jinuo3 was analysed. The results showed that Jinuo3 had significant yield increasing effect, which was 1.76% and 9.58% higher than Jingkenuo2000 and Wannuo2000, respectively. The relative heterosis of yield traits ranged from 6.57% to~68.41%, with an average of 30.73%. The mid parent heterosis ranged from 7.03% to 216.55%, with an average of 57.83%. And the heterosis index was between 107.03% and 316.55%, with an average of 157.84%. Among the traits, the heterosis of yield was the largest, with relative heterosis, mid parent heterosis and heterosis index were 68.41%, 216.55% and 316.55%, respectively. The other characters ranked from high to low were yield per plant, ear height, and number of grains per row, ear length, plant height, and axis diameter, and ear diameter, row per ear, 100 grain weight, seed yield and threshing water content.
Investigation and Prediction of Soil and Water Loss in a Factory
Authors: Jian Cheng 
Published: April 2021

Abstract
According to the natural conditions of the project, the factors of soil and water loss during the construction of the project are analyzed, the investigation and prediction period, scope and prediction unit are divided according to the characteristics of the construction project, and the method of calculating the soil erosion modulus according to the formula is used to quantitatively investigate and predict the disturbance of the original geomorphology, the area of damaged soil and water conservation facilities, the possible soil erosion area and the amount of soil erosion.
Technical Research on Engineering Ships Based on Exploration Geological Conditions
Authors: Li Chengzhi 
Published: April 2021

Abstract
As the main ship type for offshore oil and gas field exploration, the comprehensive geological survey ship has multiple functions such as drilling and sampling, marine hydrological survey, and seabed topography and geomorphology survey. The paper briefly introduces the main technical features, general layout features, ship performance and ship positioning system design of a comprehensive geological survey ship. To improve comfort, the ship optimized the layout of the superstructure. At the same time, the positioning and operation of ships at sea are affected by the disturbance force of the marine environment, and the mathematical model of the dynamic positioning system controller is established. The system uses an active disturbance rejection controller to observe the ship’s motion status and the total disturbance of the power system in real time, and uses nonlinear feedback to compensate according to the system disturbance.
Prediction of soil moisture based on BP neural network optimized search algorithm
Authors: An Xiaoyu , Zhao Fuxing 
Published: April 2021

Abstract
The accuracy of traditional soil moisture prediction method is low and the training period is long. In this paper, the BP neural network prediction model is studied, and a longicorn beetle search algorithm (BAS) optimized BP neural network prediction method is proposed. Spelman rank correlation coefficient method is used to analyze the correlation between the change of soil moisture and each variable. In this paper, evaporation, ground temperature, precipitation, air pressure, sunshine hours, air temperature and wind speed are taken as independent variables to analyze the Spelman correlation with soil moisture, and the correlation between each variable and soil moisture change is obtained. The longicorn beetle search algorithm is used to optimize the initial weight and threshold of BP neural network, and the prediction model of BAS-BP neural network is established. The soil moisture prediction model of BAS-BP is compared with different prediction models of GA-BP and BP. The results show that the average absolute error and average relative error of BAS-BP are 9.1936 and 0.1333 respectively, which is lower than that of GA-BP and BP model. The shortcomings of long training time and slow convergence speed are overcome by BAS-BP neural network, and the accuracy of prediction is improved.
Analysis of Oil-water Distribution Law in Gulong Syncline Area of Southern Gulong
Authors: Yuanyuan Ma 
Published: April 2021

Abstract
In order to find the main control factors that affect oil-water distribution in Gulong syncline, the oil-water distribution law and main control factors of Gulong syncline in Gulong South were analyzed based on comprehensive evaluation. The research shows that Putaohua oil reservoir in Gulong syncline area of southern Gulong is mainly lithologic oil reservoir under structural background, and the distribution law of oil and water is controlled by structure, sedimentation and reservoir physical properties. The distribution characteristics of reservoir physical properties are the main factors that control the distribution of oil and water in this area. This paper optimizes the reserves on the basis of recognizing the distribution of oil and water, and finally delineates the area of the well potential area X.Xkm2.