bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental Investigation of Fatigue Quality of Structure Under Tensile Load with Unloaded Fasteners Which Rivet Bucktail Overrides Bend Radius (Parallel to Load) in Civil Aircraft
Authors: Zhirong Huang , jiayi Tu , Zixiong Chen , Chuntao Diao , Jie Wen 
Published: March 2021

Abstract
In the process of civil aircraft production, there will exist such a situation that the fasteners interfere with bend radius and it is hard to replace the structure element because of some limits of objective condition. This article investigates the fatigue quality of structure under tensile load with unloaded fasteners which rivet bucktail overrides bend radius (parallel to load) in civil aircraft by fatigue tests based on DFR method. The results show that the DFR value will not decrease if the fastener interferes with bend radius is not as serious as the situation that the No.6 rivet hole of the structure under tensile load with R5 invases bend radius 1.0mm.
Collaborative optimization of high proportion renewable energy system based on Improved PSO algorithm
Authors: Meng Yifeng 
Published: March 2021

Abstract
Due to the uncertainty of renewable energy, the high proportion of renewable energy system has low cooperative scheduling capability and high cost. Therefore, based on the improved PSO algorithm, a high proportion of renewable energy system collaborative optimization method is proposed. Firstly, the framework and decomposition mechanism of transmission and distribution collaborative scheduling of renewable energy system are set up. Then, based on the analysis of the improved PSO algorithm strategy, the reactive power optimization method of renewable energy system is designed based on MSI-PSO algorithm. Firstly, the mathematical model of high proportion renewable energy system is proposed and solved, so as to complete the collaborative optimization. Finally, the simulation analysis shows that the design method has higher collaborative scheduling ability and lower cost, which proves that the collaborative optimization method of high proportion renewable energy system based on Improved PSO algorithm is effective.
Operation principle analysis of multi-function SF6 insulating gas decomposition product field detector
Authors: Zhang Jiguo , Xu Yi , Peng Bo , Ma Yao , Wang Yu , Zhao Jinyu , Lin Xin , Chen Jingzhe 
Published: March 2021

Abstract
In recent years, SF6 gas insulated equipment is widely used in power system to meet the development needs of power industry. The change of CF4 content is of great significance for analyzing the insulation state of electrical equipment. In this paper, a new technology and equipment for on-site detection of CF4 in SF6 gas based on spectral absorption principle is studied. It provides reference and technical support for the operation and maintenance of SF6 gas insulated equipment and the condition based maintenance of equipment in the future.
Research on Business Model of Power Sharing Tower Based on Canvas Theory
Authors: Zou Lifang , Ye Minquan , Yu Jing , Lin Shiyuan 
Published: March 2021

Abstract
Sharing tower resources is an active response strategy of power grid companies in the face of power reforms, an effective way to revitalize power grid assets, improve quality and efficiency, and also an important carrier for the construction of Power Internet of Things. This article discusses the connotation and principles of shared towers, proposes a business model system of power sharing tower based on canvas theory, including nine elements such as value proposition, market demand, and operating mode. At the same time, this article uses economic comparison methods to evaluate the benefits of shared towers, analyzes the method of calculating lease expenses, and proposes targeted risk prevention and control to promote the healthy and orderly development of power shared tower resources.
Research progress of magnetic materials in microbial fuel cell applications
Authors: Yao-Zhao  , Jing-Zhang  , Yuqing-Peng  , Naiqing-Sha  , Yanhong-Li  
Published: March 2021

Abstract
As a new type of environmental protection technology that can treat sewage and generate electricity, microbial fuel cells (MFC) have broad research prospects. In recent years, MFC has made great breakthroughs, but its high internal resistance and low power generation efficiency have prevented its development. Researchers began to study the influence of magnetic fields on the MFC power generation efficiency to improve the power generation efficiency, and the results are gratifying. This shows that magnetic materials may be the solution to push MFC to practical applications. This article briefly introduces the research progress of magnetic materials as the additional structure of MFC and MFCs electrode materials, and discusses the role and influence of magnetotactic bacteria in MFC.
Small Signal Stability Analysis of Microgrid with Multiple Parallel Inverters
Authors: Han Yi , Qian Zhongmin , Shao Danlu , Lin Qiujia , Yin Shuangrui , Chen Minyu , Ai Qian 
Published: March 2021

Abstract
Microgrids are introduced into power grid for managing the high penetration of renewable energy sources(RESs). Based on the resistive characteristics of the microgrid line, this paper proposes an inverter control mode combining the outer power loop controller with anti-droop control and the inner voltage-current dual-loop controller. Meanwhile, a complete small signal model of single inverter including anti-droop control, dual-loop control, filter and branch is established. Then considering the coupling relationship of the output voltage phase angles of each inverter, the small-signal model of the microgrid with multiple parallel inverters is established under the global coordinate system. The static stability analysis of the complete microgrid is carried out by the root locus method. Results show that the anti-droop control is more conducive to the accurate distribution and fast response of the active power output by inverter units than the traditional droop control.
Research on Deep Generative Model Application for Shortterm Load Forecasting of Enterprise Electricity
Authors: Zhu Liwen , Huang Yujun 
Published: March 2021

Abstract
This paper mainly applies deep generative models for short-term load forecasting on the enterprise electricity consumption dataset. After data cleaning on the electricity use dataset with the help of related weather data, we complement missing data and improve the data quality to better implement neural network generative prediction models. We build DeepAR and Wavenet as the representative of deep generative models. The main result is that deep generative models perform better compared with other baseline models, such as ARIMA, machine learning and baseline neural networks, no matter what accuracy metric and prediction horizon. Further improvement is to test in higher frequency electricity dataset with better quality.
Preparation and Characteristics of Lithium Battery Separator Based on Cellulose Modification by Water-Soluble Polyimide Impregnated
Authors: Liu Xin , Wei Sun , Liang Jie , Ning Ruxia , Sun Zhonghua , Li Xiang 
Published: March 2021

Abstract
In order to improve the comprehensive performance of lithium battery separator, cellulose based on lithium battery separator (mCNS) was prepared by cellulose/nylon 6 with ionic liquid [Emim]Ac as solvent and enhanced with polyimide (PI) as the impregnated solution. The properties of modified separator were investigated. As could be discovered from the experimental results that the addition of PI endowed the separators with more uniform and dense micro-pores, and the ions can pass through better, which was conducive to improving the electrical conductivity of the separator. Remarkable tensile strength (69 MPa) and elongation at break (35.3%) can be obtained at PI concentration of 40%. Meanwhile, the electrolyte absorption and retention rate reached 238.7% and 69.4%. The value of maximum thermo-shrinkage stress was 1.38 N and the thermo-shrinkage rate could reach 1.5%, which guaranteed the thermal stability of the battery. The electrochemical voltage was attained to 4.7 V and the ionic conductivity was improved to 0.61×10−3 S⋅cm−1. The mCNS separator preparation process was simple and the performance was excellent, which provides a novel idea for the green development of lithium battery separator.
Research on key technologies and application scenarios of energy big data
Authors: Wang Haoyue , Liu Dunnan , Zhao Hongtao 
Published: March 2021

Abstract
Big data technology is a new concept in the development of today’s society. With the current development of the Internet and information technology, the increase in data volume has become a common feature of the development of many industries, which further highlights the need for big data technology applications. As the foundation of the national economy, the trend of changes in energy big data, to some extent, determines the development direction of the entire national economy. This article starts with the relevant concepts and characteristics of energy big data, conducts research on the key supporting technologies and application scenarios of energy big data, and draws corresponding conclusions and suggestions.
The Highly Efficient Degradation on Nitrobenzene by Using Nano-copper-cobalt Bimetallic Oxide as Heterogeneous Fenton Catalysts: Efficiency, Dynamic and Mechanism
Authors: Li Jinwei , Shen Jian , Liu Qiang , Jiang Chengchun 
Published: March 2021

Abstract
The nano-copper-cobalt bimetallic composite oxide (NCC) has been synthesized under hydrothermal conditions, which was further characterized by SEM, TEM-EDS, XRD, XPS and FTIR-ATR. NCC was used as heterogeneous Fenton catalyst to degrade nitrobenzene (NB). During the degradation process, H2O2 can be activated efficiently by NCC, and NB was degraded rapidly with high efficiency among wide pH range (3-9). In detail, NB with concentration of 10 mg/L (pH=7) can be completely degraded within 45min at room temperature, in which the amount of NCC was 2.5g/L, and that of H2O2 was 0.8mol/L. OH· was the main active reactive oxidation species (ROS), which was verified by free radical quenching experiments and benzoic acid (BA) probe experiments. The stability of NCC has been proved by executing four cycling experiments, and no obvious decrease can be found on its degradation ratio. Finally, the degradation mechanism was proposed in terms of their interface pictures. This work paves a new way for the application of NCC as heterogeneous Fenton catalysts.
Meso-numerical simulation of rock triaxial compression based on the damage model
Authors: Tiankui Guo , Zeming Du 
Published: March 2021

Abstract
The mathematical model of brittle rock triaxial compression simulation is established and solved by the secondary development of COMSOL, and the numerical model is verified by rock uniaxial compression experiment and triaxial compression experiment. The meso-damage evolution of brittle rock under triaxial compression is simulated, and the influence of heterogeneity coefficient, confining pressure and loading rate on stress-strain curve and ultimate failure mode are studied. The results show that: The enhancement of rock heterogeneity makes the core failure position more dispersed, and when the coefficient of heterogeneity decreases from 10 to 0.8, the young’s modulus decreases by 14.92%, and the peak strength decreases by 35.45%; The increase of confining pressure makes the failure events gather to the fault surface, and when the confining pressure increases from 0MPa to 40MPa, the young’s modulus increases by 22.57%, the peak strength increased by 94.47%, and the residual strength increased by 112 times; The increase of loading rate makes the rock failure unit relatively dispersed, resulting in two fault planes, and when the loading rate increases from 0.01 × 10−3 to 0.2 × 10−3, the peak strength increases by 7%. This paper provides a reference for more accurate, rapid and comprehensive study of rock triaxial compression numerical simulation.
Flotation Separation of Mercury (II) using Ammonium Sulfate-Potassium Iodide-Butyl rhodamine B system
Authors: Wen Xinrong , Tu Changqing 
Published: March 2021

Abstract
The flotation separation behavior and conditions of mercury (II) using ammonium sulfate-potassium iodide-butyl rhodamine B(Bu-RhB) system are investigated. In the presence of (NH4)2SO4, KI and Bu-RhB, Hg2+ can form ternary associate precipitate (Bu-RhB)2 (HgI4) which floated above the water phase and Hg2+ is floated quantitatively at pH 1.0. While Zn2+, Mn2+, Co2+, Ni2+, Cu2+, Fe3+ and Al3+ can not be floated in the same condition. Hence, the separation method of trace mercury (II) by flotation is established. This mothod is used to separate Hg2+ in the synthetic water samples, the results are satisfactory.
Optimal scheduling method of virtual power plant based on bi level programming
Authors: Dunnan Liu , Yuan Gao , Weiye Wang , Jiahao Liang 
Published: March 2021

Abstract
Virtual power plant controls various types of flexible loads through information integration to realize efficient utilization of energy, which is an important channel to absorb high proportion of renewable energy. In this paper, an optimal scheduling method of virtual power plant based on bi level fuzzy chance constrained programming is proposed. The bi level chance constrained programming is used to describe the power price incentive strategy and the price response of the virtual power plant. The interactive mechanism between the power grid and the virtual power plant is visually displayed. The example shows that this method can realize the distributed generation and active negative of the virtual power plant The effective scheduling of load.
The Effect of Longitudinal Ventilation System on Smoke Movement and People’s Evacuation in Tunnel Fire
Authors: Xiao Kunhua , Ji Yuyang 
Published: March 2021

Abstract
Smoke movement in a model tunnel controlled by longitudinal ventilation system was studied and in this paper. Smoke movement in a tunnel was studied numerically with some equations reviewed. A numerical experiment with Computational Fluid Dynamics (CFD) was carried out. At the initial stage of tunnel fire, the velocity of ventilation fans can be set up as critical speed to slow down smoke movement and high temperature diffusion. However, in evacuation stage, the ventilation speed should be decreased to prevent smoke transmit too fast and hurt people in the downstream. Without longitudinal ventilation system, smoke is distributed symmetrically in the tunnel. When the tunnel has longitudinal ventilation system, smoke will not distribute in the upstream of the tunnel but it will spread quickly to the downstream. If people still evacuate along the center line of the downstream, they may be threatened by the smoke. This study demonstrated both the advantages and disadvantages of longitudinal ventilation system and showed that the velocity of ventilation fans should be carefully chosen.
Research on electromagnetic disturbance characteristics of magnetic coupling resonant wireless energy transmission device and converter valve system
Authors: Hao Jianhong , Xiao Zhiren , Teng Wanyi , Li Fangyi 
Published: March 2021

Abstract
The IGBT device in the converter valve device will produce complex electromagnetic disturbance signals in the process of fast on and off, and the driving circuit is close to the device. In this paper, the wireless energy transmission system based on magnetic coupling resonance is used to replace the traditional driving power supply method, which makes the electromagnetic environment in the space where the driving circuit is located more complex. In this paper, firstly, the test is completed according to the relevant standards of the drive circuit, and then the electromagnetic simulation software is used to complete the modeling and simulation of the converter valve based on the wireless energy delivery system, which proves that the drive circuit can withstand the electromagnetic disturbance generated by the wireless energy delivery system and the converter valve, and there is no need to add additional shielding measures.
Study on sealing performance of bolted flange structure after creep based on ABAQUS
Authors: Zhou Wenbo , Wang Hehui 
Published: March 2021

Abstract
In this paper, a finite element analysis model is established based on ABAQUS software and DN600 bolted flange connection structure is the research object. The elastic-plastic constitutive relation is adopted for the flange and bolt materials, and the user subroutine of Creep is written in Fortran language according to the creep constitutive equations. Each component can meet the requirements of strength and seal evaluation, and it is found that after creep, the seal stress of gasket decreases significantly, and the stress increases almost linearly from the inside to the outside of the gasket. After cooling and heating, the stress is redistributed. The residual pre-tightening force of bolt is increased, and the flange deflection angle is slowed down, which improves the sealing performance. The study of gasket sealing performance in this paper has a positive guiding significance for preventing leakage accidents.
Research on Working Characteristics of Pre-combustion Plasma Igniter
Authors: Li Zhengqing 
Published: March 2021

Abstract
In the future, aircraft will definitely move towards a faster and higher goal, and the scramjet is the only way to go. For scramjet engines, reliable and effective ignition is a key to stable combustion in the combustion chamber. Plasma ignition is the research frontier of ignition-assisted combustion technology. This technology consumes low energy, can significantly reduce the minimum energy required for ignition, and increase the rate of chemical reaction. It has obvious advantages for aero engine combustion chambers. In this paper, the working principle of plasma fuel nozzle based on rotating sliding arc discharge is described, and the discharge characteristics of rotating sliding arc are studied on this basis.
The Application of WiFi 6 Technology in Underground Mine
Authors: Min Chen , Jinhao Zhang 
Published: March 2021

Abstract
Aiming at the problems of large power consumption of 5G communication technology equipment and short wireless transmission distance of wireless signal, the author designs the wireless network coverage scheme of WiFi 6 in coal mine to achieve the fully coverage of 5G communication. This paper makes an exposition of WiFi 6 technology from the aspects of technical principle, networking mode, antenna design and power consumption calculation. The WiFi 6 signal coverage scheme solves the problem of wireless network signal coverage in long-distance roadway underground coal mine by realizing the full coverage of wireless network. The data of laboratory experiments and coal mine roadway simulation show that with the characteristics of wide network communication coverage area, fast communication speed and low power consumption, WiFi 6 network scheme can fully meet the requirements of full wireless coverage in coal mine.
Classification of municipal solid waste based on Game Analysis
Authors: She Xiaoqing , Li Xinghua , Mu Tong , Shen Shanshan 
Published: March 2021

Abstract
With the increasing amount of garbage, every city gradually enforces the implementation of garbage classification. Aiming at the problem of garbage classification, a garbage classification implementation model based on the tripartite game among managers (government), producers (production enterprises) and consumers (residents) is constructed by using the method of dynamic game. Matlab is used to simulate and analyze the dynamic equation of tripartite replication, and find out the optimal strategy suitable for the three parties, then put forward measures to improve the way of waste classification, so as to reduce the amount of waste in a real sense and improve people’s living standards.
Assessment of Ecological Risk of Soil in Rapid Urbanization Area by Risk Regionalization
Authors: Zhao Run , Li Ning 
Published: March 2021

Abstract
Rapid urbanization is a major source of environmental risk in soil. In this study, we developed the method of the potential ecological risk assessment, and investigated risk sources and soil pollution in a typical rapid urbanization area in Tianjin City, China. The proposed method was used to evaluate the level and spatial distribution of ecological risk of soil. Results show that the maximum of RI in all 114 sampling points was 1437.37, and four sampling points had RI exceeding 600, indicating extreme risk level. Moreover, the mean value of RI was 227.17, which was in moderate risk level. Among 10 heavy metals, Cd was the metal element that exhibited the most serious harm to the ecological environment, and reached high and extreme levels.
Experimental study on the frost resistance and thermal conductivity of Environmental fair-faced concrete
Authors: Chen Han , Fang Guangxiu , Zhang Ting , Cui Wenshuo 
Published: March 2021

Abstract
For fair-faced concrete buildings and structures, the secondary recycling of agricultural and industrial wastes can achieve both green energy saving and heat preservation, save costs, and protect and promote ecological and resource environments. In this paper, to fully recycle agricultural waste and industrial waste, the new type of fair-faced concrete was prepared by triple doping of fly ash, slag and rice husk ash, and three sets of concrete thermal conductivity test blocks and two sets of freeze-thaw test blocks were prepared and tested for thermal conductivity and mass loss rate. The test results showed that the thermal conductivity of the new fair-faced concrete is 0.9644 W/(m⋅K) on average, and the mass loss rate was 1.825 and 2.575 after 25 and 50 freeze-thaw cycles respectively, which meet the requirement of less than 5%. The new type of fair-facedr concrete has good energy saving and durability, and can be applied in construction projects in cold regions.
Differential Gas Drainage Technology for Upper Corner of Working Face by High Position Directional Long Borehole
Authors: Huijun Duan , Shijun Hao , Yongzhe Zhao 
Published: March 2021

Abstract
In the mining process of high gas mining area, the gas emission from goaf is large, which leads to the gas overrun in the upper corner of the working face, and affects the safe mining of the mine. This paper studies the differential drainage of the upper corner gas by high-level directional long borehole, and then solves the problem of gas control in the upper corner. Taking a fully mechanized mining face as the research object, this paper analyzes the theoretical parameters of the overlying strata failure of the working face, and according to the production practice, the high position directional long drilling layer is arranged differently, and the influence of high position directional drilling on gas drainage effect in different layers is analyzed, and the best location in different distance and height area is obtained to guide the actual production work. The research results show that the differential drainage method of high position directional long borehole can effectively control the gas overrun in upper corner of fully mechanized mining face in thick coal seam.