bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental Study on Mechanism of Foamy Oil-Assisted Methane Foam Flooding in an Etched Glass Micromodel
Authors: Zhang Yanyu , Gong Hangfei , Sun Xiaofei , Wang Xiangyu , Nie Jiacheng 
Published: September 2020

Abstract
A number of heavy oil reservoirs under cold heavy oil production with sand (CHOPS) show anomalously good primary performance due to foamy oil flow. However, as the pressure of the reservoir depletes, the foamy oil phenomenon gradually disappears and the development gradually deteriorates. In this paper, a new method named methane foam flooding is proposed as an effective enhanced heavy oil recovery process. In this paper, we take advantage of Ross miles foam equipments to select foaming agents and evaluate the foam ability, study and analyze the foam ability of different foam agent in different concentrations. and through visual microscopic model experiments to study the oil displacement mechanism and flow characteristics of methane foam flooding. The results show that foaming agent ZY-1 has excellent foam comprehensive properties, and it has the best foam stability at 1% concentration. It can be found from the micromodel flood experiments that methane foam flooding can effectively block the formation of high permeability channels, delaying the production of methane gas, emulsifying crude oil and changing the wettability of the rock to enlarge a sweeping volume and improve oil displacement efficiency.
Feature Analysis and Target Detection of High-resolution Remote Sensing Image of Coal Mining Subsidence Area
Authors: Zhang Haowei , Zhang Jin 
Published: September 2020

Abstract
Aiming at the phenomenon of regional ground collapse caused by mining, the site information is obtained through field investigation, and the features of typical collapse targets are described. The drone remote sensing images are used to extract and analyze the color features and shape features of typical collapse targets. Combine the Hough transform, shadow and Harris corner detection methods to achieve the target detection of collapsed pits and trough collapsed areas. The combined method uses Hough transform to detect the edge shape curve of the collapsed pits and trough collapsed areas, and use shadow detection method to extract its internal areas, and Harris corner detection method is used to locate local feature points in the image. Experimental analysis results show that the method has good application effect on target detection in collapsed pits and trough collapsed areas.
Error Correction Method of Crude Oil Moisture Content Detection Based on BP Neural Network
Authors: Dong Pengmin , Zeng Xianghu , Duan Chengcai , Wang Tianqi , Luo Shichong , Wang Peng , Guo Qianqian , Zhao Haikong 
Published: September 2020

Abstract
Microwave phase-shifting sensor is one of the effective means to realize online detection of water content in high water-cut crude oil, but its detection accuracy is easily affected by salinity. Aiming at the mineralization components (NaCl and CaCl2) existing in water-bearing crude oil, the influence of different proportion and content of dual-component mineralization on the accuracy of microwave phase-shifting crude oil water content detection sensor was studied experimentally, and the influence rule of dual-component mineralization (NaCl and CaCl2) on the accuracy of crude oil water content detection was obtained. It is difficult to establish an accurate error compensation model because the relationship between the composition and content of salinity and the measured water content is affected by many factors. Therefore, a BP neural network model for error correction is established, which reduces the detection error of microwave phase-shifting crude oil moisture sensor from 13.912% to 1.821%, and improves the detection accuracy. BP neural network prediction model is superior to multiple linear regression prediction model.
Experimental study and numerical analysis of fluid-structure coupling vibration characteristics for the reciprocating compressor pipeline
Authors: Yuan Wei , Deng Guide , Yang Zhirong 
Published: September 2020

Abstract
The fluid-structure coupling has been one of the hot issues of academic research in recent years, the achievements in various fields of study also emerge in an endless stream, but on the current research status, The study of fluid structure interaction in the field of dynamic equipment, especially compressor, is not very common. With the development of industrial compressors in the direction of large-scale and high-parameters, the analysis of coupling characteristics represented by fluid-solid coupling can evaluate the safe and stable operation of the system, and the evaluations are ofen more close to the actual situation. Therefore, it has gradually been valued. Through the comparison and analysis of the vibration test system of the reciprocating compressor before and after the pipeline inflation, the vibration response caused by the coupling factor is obtained, for the correctness verification of the fluid-structure coupling simulation. the numerical model of the experimental system is established based on ANSYS WORKBENCH, and the boundary conditions of the model are simulated by the experimental data, verified the feasibility of simulation program. Finally, the effects of medium density, pressure, flow rate, elastic modulus of pipe and Poisson’s ratio on fluid solid coupling vibration are discussed by using the verified simulation model. The results show that the medium density, dynamic fluid flow rate and pipe Poisson’s ratio have relatively little influence on the fluid-solid coupling vibration of the pipeline, while the medium pressure and the elastic modulus of the pipe have a great influence.
Numerical Simulation of Surface Deformation in Goaf
Authors: Hu Dingkang , He Nainan , Gao Debin 
Published: September 2020

Abstract
Coal mine goaf is a hidden, complex, surface deformation of a large range and easy to cause geological disasters of the bad construction site, the surface engineering construction of great harm. The uneven subsidence, horizontal movement, deformation, collapse and other disasters of the goaf surface have serious potential safety hazards for the construction and operation of the project. At the same time, secondary disasters such as ground collapse and collapse caused by surface movement and deformation also occur from time to time, which seriously threaten the safety of construction projects. In this paper, Flac3D is used to conduct a three-dimensional numerical simulation study on the goaf of jinjie coal mine, and the surface deformation law of the goaf is obtained by analyzing the horizontal movement, vertical settlement, horizontal deformation and inclined deformation of the goaf, which provides a theoretical basis for the surface deformation management of the local goaf.
Research on Laser Distance Measurement Technology for Remaining Volume of Large Open-pit Material Yard
Authors: He Hongwei , Zhai Shaolei , Zeng Shufan , Fu Kunpeng , Ruan Jun , Wang Yuyuan 
Published: September 2020

Abstract
In view of the problems of low volume calculation accuracy, long data acquisition period, and inability to uniformly measure and calculate the storage yard type when measuring the storage of large yards using volume and density conversion, a high-speed laser scanner, distance sensor, angle sensor, and pitch sensor are proposed Integrated technology, quickly obtain the three-dimensional coordinate data of the yard, and derive a unified three-dimensional coordinate solution algorithm, establish a three-dimensional coordinate system of the yard space to solve the three-dimensional coordinates of the yard, and accurately calculate the storage volume of the yard. At the same time, the system construction architecture, composition, data processing methods and issues to be considered are proposed. This method effectively solves the problems faced by the existing measurements in large yards, and improves the measurement efficiency, accuracy and safety. Under the test conditions, the absolute accuracy reaches 0.4%. Several project examples show that the method is simple, efficient and accurate. The ordinary measurement time of a 200m stockyard does not exceed 20mIn, and the repeated measurement error of the measurement volume is less than 0.7%. It has good application prospects and popularization value.
Investigation on Combustion Characteristics of Methanol-Syngas Fuel
Authors: Chen Yexin , Jiang Yankun 
Published: September 2020

Abstract
Methanol has a broad application prospect in internal combustion engine due to its renewable and environment-friendly characteristics. In this research, a method of using mixture of methanol and syngas as internal combustion engine fuel is proposed, while the syngas is produced by dissociating the methanol through making use of the exhaust heat of the engine. By analyzing reaction path of fuel oxidation and sensitivity analysis of elementary reactions, the effect of syngas on the oxidation process of fuel was studied. The effect of blending ratio and equivalence ratio on ignition delay time and laminar flame speed was investigated. The research results can provide theoretical guidance for the application of methanol-syngas fuel in internal combustion engine.
Biomass Pyrolysis Liquefaction Technique: State of Research and Development Trends
Authors: Li Jie , Li Nan , Qiao Yingyun , Zong Peijie , Wang Chengbiao , Tian Yuanyu , Qin Song 
Published: September 2020

Abstract
Biomass as the only renewable carbon sources in nature are considered to be huge amount, environmentally friendly and carbon neutral resources. Exploiting biomass as an energy utilization not only maximizes deal with the agricultural and forestry waste, but also refining high value-added bio-based chemicals products. As one of the important means of bio-refinery conversion processes, biomass pyrolysis liquefaction technique (BPLT) has been popular in producing fuel product since the late 1970s due to its advantages in its short process, strong adaptability, rapid response, high conversion rate and easy commercialization, etc. This paper provides an overview of current research progresses in the BPLT. Summarizes the latest research results of the combined processes for BPLT in feedstock pretreatment, pyrolysis liquefaction process and bio-oil upgrading. In the section of feedstock pretreatment, three methods of microwave drying, baking and pickling are introduced. In the section of pyrolysis process, two new processes of catalytic pyrolysis and mixed pyrolysis are discussed. The final part of the paper deals with recent technologies from five aspects in the bio-oil upgrading: catalytic hydrogenation, catalytic cracking, catalytic esterification, emulsified fuel and separation and purification. Afterward, the paper analyzes the industrialization development trends of BPLT. The paper suggests that make the production and upgrading of pyrolysis oil to hydrocarbon fuels is an economically attractive path. By critically evaluating their potential and challenges, we finally conclude, with the continuous maturity of various technical links such as feed prep, fast pyrolysis and upgrading, BPLT is expected to form a relatively complete technology industrial chain within 5 to 8 years, and gradually realized the industrialization in the true sense.
Intelligent Measurement and Adjustment of Layered Wells Achieve Precise Water Injection and Improve Measurement and Adjustment Efficiency
Authors: Liu He 
Published: September 2020

Abstract
The conventional layered water injection well test uses the wire and cable connection method. During the test, it is necessary to repeatedly drop and remove the test instrument and tool, use the test tool to detect the flow, and use the fishing plug to adjust the water nozzle. The deployment efficiency is relatively low. The intelligent measurement and adjustment system for layered wells is powered by cables to achieve real-time signal transmission. It has online sealing, nozzle-free fishing, continuous adjustment, real-time direct reading of test data, real-time monitoring of layered deployment parameters, shortening test deployment time, and improving with the advantages of measurement and adjustment efficiency and accurate water injection, field tests show that the intelligent measurement and adjustment system for layered wells has good application and promotion value.
Experimental Study of Magnetic Leaking Stoppage Device used on Gas Cylinder
Authors: Chen Jie , Huang Song , Zhao Zhongguo , Xiong Shutao 
Published: September 2020

Abstract
In view of the current necessity of the road transportation safety of the dangerous goods, the lack of effective emergency blocking technology is the Current issues that need to be focused on. This paper designs a kind of emergency blocking equipment for the leakage of dangerous goods transport vehicle tanks. By introducing a strong magnet and blocking with a rubber layer, the leakage on the surface of the ferromagnetic equipment can be quickly blocked. A simulated test of the designed 1.5 MPa leak stopper was carried out on a vechicle gas cylinder. The test results showed that there was no pressure drop in the gas cylinder during the holding time of 1.5MPa, and the leak plugging effect was better, which can be widely used in maintenance work. In addition, the continuous test found that the leakage limit pressure at the shoulder and bottom of the gas cylinder is lower than that at the cylinder body, and it should be focused on in the subsequent promotion process.
Research on PID Control of Water Level in Pile Legs Based on Improved PSO
Authors: Sun Zhaocai 
Published: September 2020

Abstract
Aiming at the problem of poor water level control effect during mud dredging in pile legs, based on the research of traditional PID algorithm and particle swarm algorithm, a PID parameter optimization method based on improved PSO(IPSO)was proposed. This paper adopts a nonlinear dynamic adaptive inertial weight (ω) method and introduces a time factor to adjust the position update time. In this paper, a mathematical model of the water level control system in the leg is established, and the system is simulated by MATLAB / Simulink. By comparing the simulation results, PID controller optimized by improved PSO is better than traditional PID controller. The proposed method provides a theoretical reference for the water level control system during the mud dredging operation in the pile legs.
Research on Open Mining Intelligent Equipment Based on Internet
Authors: Zhang Yongming , Qiao Jianqiang 
Published: September 2020

Abstract
Based on the establishment of mines, the use of advanced industrial Internet technology, based on the solid model and block model, using 3DMine smart equipment software to study the intelligent collection equipment of open pit mines, through the intelligent research of equipment, research and development It has developed advanced quota intelligent equipment, including intelligent sorting system and intelligent collection device system, etc., and discussed the influence and application of different intelligent equipment in the state of open pit mine. The preliminary design provides a technical plan and decision basis for smart equipment.
An Analysis of Progress and Models of Local Green Mining
Authors: Huang Jie , Guo Dongyan , Hou Huali 
Published: September 2020

Abstract
The development of green mining is an important measure to improve the ecological civilization construction in the mining field and build a beautiful China. On the basis of extensive research, the author analyzes the development progress of green mining in China from 7 aspects. Based on the unique practical experience of various regions, the author summarizes four development models, namely: multi-industry integration development model, integrated development model of mining, processing, manufacturing and transaction, comprehensive development and utilization mode of mine and land, and layout optimization driving model, and analyzes the problems faced by green mining in three aspects: technological innovation, working mechanism, and system construction. Based on this, countermeasures and suggestions are proposed: the first is to promote technological innovation, develop and promote new efficient technologies in the development and utilization of mineral resources; the second is to promote management innovation and establish a new working mechanism for green mining; the third is to promote institutional innovation and effectively play the guiding role of policies.
Evaluation of the Transformation and Development of Mining Industry in China from 2010 to 2017
Authors: Guo DongYan , Huang Jie , Hou Huali 
Published: September 2020

Abstract
The transformation and development of mining industry is the inevitable choice based on the economic society of China of China under the new development concept. This paper builds an evaluation index system for the transformation and development, and uses a comprehensive evaluation method to calculate and analyze the transformation and development the mining industry in China from 2010 to 2017. The results show that: Over the past eight years, the transformation and development of the mining industry has increased steadily, and the transformation development index has increased from 1 to 1.677, an increase of 67.7%. The four sub-indexes, namely the average output value of mine, proportion of mining industry, proportion of large and medium-sized mines, and proportion of clean energy production, are all in good agreement with the trend of the transformation and development index. In different historical periods, the significance of the promoting effect is different. In the future, it is necessary to implement comprehensive strategies for the improvement of the transformation and development of mining industry in China.
Design of Bidirectional Wireless Transmission System Based on Wellbore Pressure Pulse Signal
Authors: He Tong 
Published: September 2020

Abstract
To solve the problem that the downhole data cannot be transmitted in real time and the downhole condition cannot be known in time during the well injection process, the downhole data wireless transmission technology was designed and developed. The wireless transmission method of downhole data signal was studied and the data encoding method was invented. The control circuit of intelligent measuring and adjusting instrument was designed for layered water injection. In 2019, the field test was carried out, which verified the feasibility of downhole data transmission method. The preliminary success of the wireless downhole data transmission technology can promote the development of intelligent well injection technology.
Power system reliability analysis
Authors: Feng Xiwen , Tong Fei 
Published: September 2020

Abstract
Electric power development is the key factor of economic development, but also an important guarantee of industrial modernization. At present, with the improvement of people’s quality of life, electricity has become an indispensable part of ensuring people’s lives. Therefore, the stable and reliable development of power system has an important impact on economic development, industrial modernization and people’s lives. With the continuous maturity of the reliability theory, the power system and its combination have evolved into an important application subject called the reliability evaluation of the power system, which has penetrated into the whole industrial chain of the power system, which is a reliable guarantee for the industrial chain to gain economic and social benefits. Based on the analysis of the operation reliability of power system, this paper puts forward the main measures to improve the operation reliability of power system in order to meet the operation requirements.
Study and Application on Production Decline Law of Water Drive Characteristic Curves
Authors: Zhao Hongyue 
Published: September 2020

Abstract
Water drive characteristic curves and production decline curves are two important method to evaluate the recoverable reserves of oil field and predict development index. In this paper, we begin with deducing of Arps decline rules, and concluded that if the relationship of production decline rate of the same or similar model, they have the same or similar development index. According to this law, four kinds of commonly used water drive curve was deduced with oil production decline rate under the condition of fixed liquid. And Using this relationship, we established the method to prediction each year (month) development index of four commonly water drive curve. Through example, with the industry standard of recoverable reserves, compared to the results of the calculation formula of achieved higher prediction accuracy, and precision increases along with the time step narrowing of set, and the precision can be controlled. The research of this paper provides a basis for the prediction of water drive characteristic curve development index, and a basis for the selection of the recoverable reserve, and a method and reference for the further study of the water characteristic drive curve.
Research on Computer Algorithm of Mine Gas Release Source Location Based on Multi-source Sensor Fusion
Authors: Nan Jiangping , Dai Xuezhen 
Published: September 2020

Abstract
Aiming at the problem of gas leakage source difficult to locate or inaccurately located due to the air leakage phenomenon in the goaf of coal mines, this paper proposes a mine gas emission source location algorithm based on multi-source sensor fusion. Firstly, by analyzing the gas distribution law of the goaf in the fully mechanized caving face, the sensor observation model and the gas release source diffusion model of the mine goaf are established, and then the machine learning positioning algorithm is used to estimate the parameters of the gas release source in the goaf and according to the iterative calculation The coordinate positions of the estimated parameters are obtained. Finally, the data fusion of the wireless sensor target source sensing node and the cluster head node is used to achieve the precise positioning of the gas release source. The results show that: compared with other algorithms, machine learning algorithms have obvious advantages in positioning accuracy. This method can effectively solve the problem of difficulty in locating the gas release source due to the air leakage phenomenon, and then provide a reference basis for gas prominent warning and gas extraction in the goaf.
Thin-wall bearing contact characteristics analysis and deformation research
Authors: Meng Dezhang , Wang Yanjun , Gao Pengyuan , Liu Lei 
Published: September 2020

Abstract
Considering the elastic deformation of the bearing ring structure, a nonlinear contact model of the thin-walled deep groove ball bearing (61856) was established. The contact stress and deformation of the thin-walled deep groove ball bearing were simulated and analyzed under the two conditions of rigid and flexible constraints. The distribution law of contact stress and deformation of bearing rolling elements and different parts of inner and outer rings was studied. The comparison between the simulation results and the test data shows that the error between the simulation results and the test data is relatively large under rigid constraints, which is not suitable for the analysis of the finite element mechanical characteristics of thin-walled bearings. However, it has obvious consistency under flexible constraints, and the simulation results are basically consistent with the experimental data. The experimental results show that it is feasible to use ANSYS to analyze the contact problem of thin-walled bearings under flexible constraints, which is in line with the actual situation of thin-walled bearings under stress and deformation. The results of finite element simulation calculations provide a reference for the lubrication, comprehensive mechanical properties and failure analysis of thin-walled rolling bearings and lay a foundation for further research on the thin-walled bearings’ elastic contact problems.