bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application analysis of isotope water absorption profile in ternary test of second class weak alkali
Authors: Zhang Hongdi 
Published: May 2021

Abstract
In the weak alkali ASP flooding test of Pu II 4 - 9 reservoir in the second area of north east block of lamadian oilfield, the original well pattern of strong alkali ASP test area was used for backward development of Pu II 4 ~ 9 reservoir. According to the analysis of isotope water absorption profile results, the production degree of blank water flooding reservoir was obviously higher than that of strong alkali ASP test at the same stage. In this paper, the principle of isotope water absorption profile reflecting the utilization degree is analyzed, and it is considered that poor water quality is the reason for the large difference of utilization degree in test areas, and the feasible methods to reduce this kind of influence are put forward, and the corrected utilization degree in test areas is given.
Research on Construction Control of Vertical Rotation of Concrete-filled Steel Tubular Basket Arch Bridge
Authors: Ma Yurong , Chen Haibo , Han Qianwen 
Published: May 2021

Abstract
This paper focuses on the theme of bridge construction control, using the finite element analysis and calculation program as the platform, taking a concrete-filled steel tube concrete basket arch bridge as the research object, combining the theoretical foundation of the concrete filled steel tube basket arch bridge, and using finite element software to simulate the rotating structure in three dimensions Simulation, analysis of the force status and longitudinal and lateral changes of the rotating structure at various angles and when closing, and the structural stability analysis of the rotating process. The most unfavorable stress conditions and the most vulnerable to instability conditions are determined. And through simulation, the accuracy of the line shape of the steel pipe arch rib in the vertical rotation process, the accuracy of the arch axis detection and the accuracy of the elevation detection are estimated.
The Application of Fuzzy Comprehensive Evaluation Method in Evaluating Remaining Oil Potential of Oil Layer
Authors: Sun Lijing 
Published: May 2021

Abstract
In this paper, remaining oil saturation, microfacies type, oil layer thickness, structure, permeability variation coefficient, injection-production relationship, injection-production perfection degree, effective perforation thickness, connected thickness, water injection distance, water injection well pattern, water cut of oil well and production measures, these thirteen static and production dynamic indicators constitute the evaluation factor set of remaining oil potential, hierarchy and statistical analysis of weight coefficients are carried out for each factor, taking block A as an example, the multi-level fuzzy comprehensive evaluation method is used to quantitatively evaluate the remaining oil potential of complex heterogeneous reservoir, so as to achieve the purpose of regional governance in accordance with size of remaining oil potential.
Optimization Research on Centralized Monitoring Design of Ternary M1 Joint Station
Authors: Fu Siqiang 
Published: May 2021

Abstract
In the centralized monitoring construction mode of oilfield stations, the original duty posts set by functional units are cancelled, and a centralized control room is set up to transmit the production data information to the central control room and then upload it to the higher-level production command system step by step, so as to realize remote monitoring, centralized duty, unified layout, unified monitoring and unified management in the station. The density of well pattern and stations in old oilfields is large. With the construction of productivity projects, it is necessary to make rational use of existing facilities to complete the optimization study of centralized monitoring design of new stations, so as to reduce the difficulty of production management, improve the quality of monitoring system and improve the level of production management. In this paper, the centralized monitoring design of ternary M1 joint station is optimized through comparison and selection of multiple schemes, and a reasonable monitoring system construction mode is selected according to each station’s own situation, so as to simulate the employment situation of production operation management, fully analyze and consider the production management needs, and avoid affecting the production operation due to the omission of centralized monitoring design.
Quantitative evaluation of water injection composition in high injection-production ratio blocks - Taking Chao 5 well block as an example
Authors: Zhao Guozhong , Wang Hongwei , Jing Min , Zheng Xinbao , Fu Zhiguo 
Published: May 2021

Abstract
The injection-production ratio of the oilfields in the periphery of the Changyuan Placanticline is high. The cumulative injection-production ratio of the main oilfields in the Putaohua oil layer is between 1.29-2.46, and the cumulative injection-production ratio of the main oilfields in the Fuyang oil layer is between 1.98-2.65. At present, the viewpoints of high cumulative injection-production ratio and large ineffective water injection are generally concentrated on unmarked reservoir sandstone sections, water absorption by shale, overflow along faults and fracture systems, measurement errors, and pipeline leakage. In response to the above problems, this paper takes the Chao 5 well block as an example, establishes a block-wide numerical simulation model, carries out a quantitative evaluation of the water injection composition of a high injection-production ratio block, and analyzes the main controlling factors of different types of water injection. The research results show that the water absorption of the reservoirs in the North Chao 5-Chao 5 block accounts for 55%, the unmarked reservoir section absorbs 28%, and the mud shale absorbs 8%; the overflow of water drops to 12%. The research content of this article has a certain guiding significance for improving the level of oilfield water injection development and ensuring the efficient and sustainable development of oilfields.
Research on quality inspection technology of gas drainage borehole sealing hole in Sihe Coal Mine
Authors: Chen Yutao 
Published: May 2021

Abstract
The quality of the hole sealing of coal seam gas drainage directly determines the efficiency of coal seam gas drainage. This paper uses the YFZ3 gas drainage borehole sealing quality tester to measure the gas drainage parameters at different locations in the borehole W33011 coal seam in Sihe Coal Mine. According to the change law of the measuring point data, it judges the quality of the sealing hole and determines the reasonable sealing depth. The research results show that Sihe Coal Mine should strengthen the training and supervision of underground plugging workers, and strictly control the details of the plugging process, such as the grouting pressure, water-cement ratio configuration and grouting volume during the plugging process. The detection borehole has a serious air leakage channel in the range of 12m~20m, and the sealing depth should be increased to 20m to increase the concentration of single-hole gas drainage.
The positioning principle of global positioning system and its application prospects
Authors: Wang Yingchun , Li Yuan 
Published: May 2021

Abstract
Due to the continuous advancement of science and technology, more and more construction fields have realized the transformation from science and technology to productivity. Including GPS positioning technology. GPS (Global Positioning System) is a system that uses positioning satellites to achieve precise global positioning and can also navigate. The United States developed and used a satellite navigation and positioning system in 1994. The application of this technology has basically covered all areas of the national economy. GPS is widely used in ground surveying, engineering surveying, aerial photogrammetry, topographic surveying, etc. in the field of surveying. The application prospect of GPS system is introduced.
Calculation of radius of plastic zone in surrounding rock of roadway
Authors: Xu Zunyu 
Published: May 2021

Abstract
Morh-Coulomb yield criterion and Drucker-Prager yield criterion are two commonly used strength criteria in geotechnical analysis. The former is considered to be more suitable for geotechnical media. In this paper, the plastic zone radius of roadway surrounding rock is compared with two yield criteria under different influence factors. Finally, the different characteristics of two yield criteria and the application in engineering design are obtained.
Reasonable utilization and study of rainwater in semiarid area
Authors: Zhu Tingting 
Published: May 2021

Abstract
The important way to improve productivity and realize sustainable development in semi-arid area is to utilize rainwater, this paper takes Fengxi New Town as an example, comprehensively uses the Analytic Hierarchy Process (AHP) and fuzzy comprehensive evaluation method to comprehensively evaluate and analyze the utilization benefit of rainwater. The results show that the weight of rainwater utilization benefit is ecological benefit > economic benefit > Social benefits benefit; the strategy of efficient utilization of rainwater in semi-arid area is put forward.
Study on the Improvement of Ecological Environment in the Space of Shanghai Primary and Secondary Schools by Rain Gardens
Authors: Yan Fanghan 
Published: May 2021

Abstract
Low Impact Development (LID) is a technology of rainstorm management and water pollution treatment developed in the late 1990s. As one of the LID measures, rain gardens can alleviate the urban rainstorm in Shanghai. Aiming at the low rate of environment utilization in the spaces of Shanghai primary and secondary schools, this paper proposes to collect the rainwater runoff from buildings and roads in the form of rain garden. We try to use artistic design techniques, and establish the campus environment with the value of rain and flood management, sustainability and biodiversity. The study results show that the sample rain garden covers an area of 310m2 with a water storage depth of 30mm, and has recorded 6 short-term heavy rainfalls and 1 overflow in 1 year. The biodiversity has increased by 70%.
The production and treatment of industrial waste water
Authors: Peng Haoyu 
Published: May 2021

Abstract
With the acceleration of industrialization in China, the quantity and scale of industrial waste water will continue to increase, and higher requirements will be put forward for the treatment of industrial waste water. This paper aims to analyze the current situation of industrial waste water production, summarize the problems in the process of waste water treatment, and provide measures to improve the quality of industrial waste water treatment based on the actual situation, so as to provide reference for similar research. At present, the rapid development of China’s industrial industry, the continuous increase of industrial economic scale, promote the rapid development of the national economy, resulting in varying degrees of environmental pollution. In fact, many industrial enterprises pay more attention to efficiency than waste water treatment, or directly discharge waste water that does not meet environmental standards, which directly affects people’s normal life and destroys the original ecological balance. Through the powerful industrial waste water treatment, has the practical significance.
Fracture analysis and improvement of charging pump shaft in nuclear power plant
Authors: Liu Jihua , Chang Xincai 
Published: May 2021

Abstract
The charging pump of a nuclear power plant is a multi-stage double shell centrifugal pump. From the installation period, the pump shaft broke after 25 times of start-up and shutdown and 2913 hours of cumulative operation. As the charging pump is one of the core equipment in the normal operation and accident of the nuclear power plant, the root cause of the pump shaft fracture must be found and corrective measures must be taken, otherwise there will be major safety hazards. Through the analysis of the material, design structure and mechanical properties of the pump shaft, it is found that the root cause is that there is a deviation in the processing of the structural dimension of the stress relief groove of the pump shaft, which leads to the insufficient fatigue strength margin and the occurrence of abnormal operation conditions during the superposition commissioning, which leads to the fracture of the pump shaft. By optimizing the structural design of the stress relief groove and controlling the reasonable operation, no fracture occurred again. The causes and treatment of this typical event can provide certain theoretical support for the design, operation and maintenance of similar equipment.
Short-term load forecasting based on MA-LSSVM
Authors: Wei Liangkun , Li Jianguo 
Published: May 2021

Abstract
Aiming at the problems of low accuracy and poor accuracy of short-term load forecasting (STLF), monkey algorithm (MA) and least square support vector machine (LSSVM) are combined for STLF. The input factors of the model are load data and meteorological information. MA is used to optimize the kernel function parameter σ and the regularization parameter λ of LSSVM to obtain the optimal solution of the least square support vector machine prediction model. Then a STLF model was established.
Study on electrolyte additives of water-based magnesium batteries
Authors: Wang Panpan , Xu Jing , Gong Youlai , Chen Changguo 
Published: May 2021

Abstract
The effects of different inorganic salt additives on the corrosion resistance, hysteretic behavior and activation potential of magnesium anode in MgSO4-Mg(NO3)2 composite electrolyte (1.86 mol·L-1 Mg(NO3)2 + 0.14 mol·L-1 MgSO4) were compared by electrochemical method. The electrochemical test results showed that in the solution containing 0.02 mol/L NaHCO3, the activation potential of magnesium anode was the most positive, the passivation range was expanded, and the polarization current was reduced. The impedance of magnesium alloy with 0.02 mol/L NaHCO3 has the highest corrosion resistance, which is consistent with the conclusion that the corrosion current density of Tafel polarization curve is the lowest. Under the additive concentration, the magnesium anode has the shortest lag time, the most negative discharge potential and the least potential drop, which greatly improve the discharge performance of magnesium anode.
Operation mode of integrated energy system considering behavior characteristics of multiple subsystems
Authors: Gong Chuanzheng , Lin Linjia , Yan Qibo , Tang Chenghong , Ge Yangyang , Luo Gang , Zeng Ming , Liu Ximei 
Published: May 2021

Abstract
With the deepening coupling of power, natural gas and thermal network, the operation mode of integrated energy system has gradually become a new research hotspot. In this paper, taking the park level electric-heat-gas integrated energy system as an example, based on the study of its main characteristics, a mathematical model for the optimal operation of the integrated energy system is constructed, which mainly considers the gas turbine, energy storage and other equipment, in order to realize the economic operation of the system.
Preparation and characterization of coal gangue modified road asphalt
Authors: Yao Shuang , Zhao Liang , Yang Jiayi , Jiang Hong , Nan Yunxi 
Published: May 2021

Abstract
Coal gangue is one of the largest industrial wastes in China, a large number of coal gangue accumulation not only occupies too much land area, but also causes surrounding land and air pollution. In this paper, the coal gangue samples were activated at first, and then the coal gangue powder was modified by adding coal gangue powder to road asphalt with the ratio of 0.5 and 1.2, and the penetration, softening point and ductility of the modified asphalt were tested. The results show that the viscosity, strength and softening temperature of modified asphalt can be improved by adding coal gangue powder into asphalt. With the increase of the amount of coal gangue powder in asphalt, the change of penetration and softening point of asphalt will be greater, and the strength of asphalt will also increase, but it will also make the toughness of asphalt worse. By adjusting the powder-binder ratio, the modified asphalt can adapt to different environments and use conditions, so that it can be widely used.
Finite element analysis of stress and distortion for welding reinforced structure of angular steel
Authors: Zhang Hui , Huang Zhenning 
Published: May 2021

Abstract
A 3-D finite element model of residual stress and distortion in welded structure with square section for angle steel is developed based on thermal-elastic-plastic theory. The residual stress and deformation for welded structure under different conditions are calculated and their distribution characteristics are comparatively analyzed. Results show that, relatively larger stress is generated in and near the weld zone for the welded joint. With an increase in weld length, both equivalent stress and residual distortion increase accordingly, but the effect of weld length on welding residual stress is limited. Under the conditions of 20 mm, 50 mm and 100 mm long welds, the deformations of the three reinforced structures caused by 15000 Pa external load are 4.80mm, 4.79mm and 4.78mm respectively, indicating they have the similar bearing capacity.
Lithium sulfur battery cathode materials based on COFs ordering
Authors: Lin Hong , Zhang Junli 
Published: May 2021

Abstract
In recent years, lithium-sulfur batteries and fuel cells, as a kind of new energy which is expected to replace traditional fossil fuels, have attracted people’s attention. At present, the “shuttle effect” of lithium-sulfur batteries is one of the key factors limiting the performance and application of lithium-sulfur batteries. It is urgent to find a suitable positive electrode composite material to suppress the “shuttle effect”. Covalent organic compounds (COFs) have been considered as ideal potential cathode composites for the anchors of sulfur and lithium compounds because of their regularized structure and polar functional groups. This paper mainly discusses the structure order of COF material, and gives the synthesis method of this kind of porous polymer material. The method of COFs synthesis is to design and assemble 2-D and 3-D COFs materials with different topological structures by choosing different geometrically constructed monomers and linking methods. Lithium-sulfur battery is a kind of battery with high energy density and theoretical capacity. The key to solve the shuttle effect is to find a suitable cathode composite material. Based on the order of COFs material structure, the feasibility and advantages of COFs as cathode material for lithium sulfur batteries were proposed.
Application of microbial remediation in the treatment of offshore oil pollution
Authors: Zhu Xinru 
Published: May 2021

Abstract
With the development of offshore oil industry, the pollution caused by frequent oil spill accidents has brought great pressure to marine ecology. How to repair the oil polluted sea area economically, efficiently and safely has become an urgent problem to be solved in marine ecological environment protection. In this paper, the main factors affecting the bioremediation of marine oil pollution are the polluted sea environment, the physical and chemical properties of oil and the types of microorganisms. The research progress of marine ecological restoration at home and abroad and the main research direction of marine oil pollution ecological restoration technology are summarized. The possible problems in the repair application are analyzed, and the further research direction is proposed.
Mechanical Properties of Vitrified Micro Bubbles Recycled Concrete Mixed with Calcined Diatomite
Authors: Bing Song 
Published: May 2021

Abstract
In order to prepare vitrified micro bubbles recycled concrete that meets the requirements of strength, the basic mechanical properties of recycled concrete with different vitrified micro bubbles were tested by adding calcined diatomite. The results show that: Calcined diatomite can fill the macroscopic cracks existing in the recycled coarse aggregate and effectively improve the performance of concrete and enhance the compressive strength of recycled concrete; With the increase of the amount of vitrified micro bubbles, the apparent density, compressive strength, splitting tensile strength and elastic modulus of recycled concrete all show a downward trend. When the amount of vitrified micro bubbles is 100% and the amount of calcined diatomite is 3%, the cubic compressive strength of recycled concrete can reach 32.36Mpa and the apparent density is only 1945kg/m3. Based on the experimental analysis, a linear relationship between cubic compressive strength fcu
and axial compressive strength fc
of vitrified micro bubbles recycled concrete is presented.
Study on the explanation rate of Fungi based on Ecological Model
Authors: Wang Shaoyilin , Zhou Yifei , Shen Zhujun 
Published: May 2021

Abstract
This article analyzes the relationship between fungal decomposition rate and its two important characteristics: extension rate and moisture resistance by establishing a fungal lignocellulose decomposition model when multiple types of fungi decompose wood fibers in the same area, and further predicts the role of the diversity of fungal communities in an ecosystem. we first divide fungi into two categories based on temperature: fast-growing but highly affected by the environment, called RABBIT; and slow-growing but relatively stable fungi (less affected by the environment), called TORTOISE. Humidity is an independent variable, using regression analysis method to establish a fungal growth decomposition model, we can find that the fungal decomposition rate and the logarithm of the expansion rate and the logarithm of moisture resistance are roughly linear. According to the fungal decomposition model obtained in question1, we use cellular automata and Lotka-Volterra model to establish interaction models between different types offungi, and find two types of bacteria with different competitiveness, RABBIT and TORTOISE, when competition coefficient of the mare different, we can find that the two groups of fungi will produce different competition results (may coexist, or one group of fungi may be eliminated).
Study on Layered Double Hydroxide and Its Electrochemical Performance
Authors: Chen Siwei , Peng Jing , Liu Tianyu , Song Ming 
Published: May 2021

Abstract
The layered double metal hydroxide can be used as a battery cathode material with the advantages of good stability, easy synthesis and low price. This article mainly studies the electrochemical performance of Ruthenium-containing Fe-Ni layered double metal hydroxide as the cathode material of the battery. The experiment mainly adopts the hydrothermal method to prepare FeNiRu-LDHs, and further calcines them in an argon atmosphere at different temperatures to obtain FeNiRu-LDOs with different Ru concentrations at different temperatures. Through cyclic voltammetry curve and impedance analysis, temperature is used as a variable to determine the electrochemical performance of the material has been tested in groups, and it is found that the 20FeNi-LDO calcined at 450°C showes excellent electrochemical performance. XRD, RAMAN and SEM are further used to study the characterization properties of the sample, and it is found that the shape of Ru20FeNi-LDHs at 450°C is better. Meanwhile, the comprehensive electrochemical performance of Ru20FeNi-LDHs material is best.