bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on Material Defects of Circuit Breaker Oil and Gas Pipelines
Authors: Xie Yi , Zuo Penghui , Zhou Xinghua , Chen Bin , Zhou Pan , Feng Chao 
Published: January 2021

Abstract
The circuit breaker oil and gas pipeline was closely connected with its hydraulic mechanism and SF6 insulation system, and was an important accessory related to the mechanism’s power and insulation performance. Aiming at the current high-pressure tubing fracture of the oil and gas pipeline of the circuit breaker, the cracking of the SF6 three-way valve interface bolt and the connecting pipe, the chemical composition, mechanical properties, metallographic structure and fracture morphology of each accessory were analyzed from the material point of view, and the material composition was found poor, excessive hardness and abnormal metallographic structure were the main reasons for the failure of circuit breaker oil and gas pipeline components, and technical supervision suggestions had been put forward from the aspects of network check and operation and maintenance inspections.
Numerical Study on the Influence of Ventilation on the Heat Flow of Cable Fire in Narrow-long Space
Authors: Xiong Yanyi , Ma Yiwei , Shen Bing , Zhu Kezhou , Zhao Huiping 
Published: January 2021

Abstract
In order to study the characteristics of heat flow field after fire in a narrow-long space, a mathematical and physical model for fire calculation in a narrow-long space is established. The control equations are simplified and deformed. The numerical program is used to solve the model. The characteristics of smoke spread, temperature field distribution and the change of fire parameters in different positions with time are obtained. The influence of ventilation on the heat flow field of fire is discussed. By analyzing the characteristics of fire flow field, it can provide reference for fire detection design in narrow-long space.
Effect of Torrefaction Pretreatment on Chemical Structure and Pyrolysis Behaviors of Cellulose
Authors: Zheng Anqing , Li Luwei , Zhao Zengli , Tian Yuanyu , Li Haibin 
Published: January 2021

Abstract
In order to obtain the effect of torrefaction pretreatment on chemical structure and pyrolysis reactivity of cellulose, torrefaction of cellulose was conducted in a fixed bed reactor at varying torrefaction temperature and residence time. The chemical composition and structural alterations of torrefied cellulose were characterized by elemental analyzer and Fourier-transform infrared spectroscopy (FTIR). The investigation on the pyrolysis behaviors of raw and torrefied cellulose were carried out by using a thermogravimetric analyzer (TGA). The results showed that torrefaction of cellulose mainly proceeded a series of deoxygenation, polycondensation and carbonization reactions. The severe carbonization of cellulose occurred when the torrefaction temperature and residence time were larger than 300°C and 40 min, resulting in the drastic decrease in the pyrolysis reactivity of cellulose. Hence, the optimal torrefaction temperature should not exceed 280°C.
Study on schedule risk assessment of power transmission and transformation project based on improved risk chain
Authors: Liu Qin , Yin Chen , Chen Bingqian 
Published: January 2021

Abstract
The development and management of power transmission and transformation project schedule is highly subjective, and the delay of construction period will bring risks and losses to all parties. With China’s power construction entering the period of structural adjustment and transformation, it has become a new trend of power development to adopt scientific project management methods to improve the risk management level of power transmission and transformation projects. This paper first identifies the schedule risk of power transmission and transformation projects, analyzes the correlation between schedule risks based on the risk chain theory, establishes the schedule risk evaluation model based on the improved risk chain, and makes an empirical analysis on the schedule risk assessment of a power transmission and transformation project, which has a good effect on quantifying the schedule risk of power transmission and transformation project.
Application of PV-assisted Intelligent Electric Vehicle Charging and Switching Power Station
Authors: Wang Ye 
Published: January 2021

Abstract
Taking a new office area as an example, this paper introduces the design of power supply and distribution system for traditional electric vehicle charging pile. In view of the adverse impact of large-scale EVs load on the power grid, a photovoltaic charging and switching power station microgrid system is proposed, and intelligent dispatching is carried out through the energy management system. The scheme combines the development of clean energy with the supporting facilities of electric vehicle, which can effectively solve the problems caused by the connection between new energy and power grid, and improve the quality of power grid. The Energy Management Strategy reduces the impact of traditional charging stations on the urban distribution network and the consumption of urban electricity during peak period, and has higher economic benefits.
Analysis of the Effect of wind Loads on the dynamic response of the Suspended Crossing-Tower Auxiliary System
Authors: Bin Zhang , Dongliang Xue , hongjun Liu 
Published: January 2021

Abstract
The operational impact analysis of Crossing-tower Auxiliary Fittings System is a performance impact analysis of the operational stability and performance indicators of the line and auxiliary towers under a variety of environmental conditions for the long-term operation of the auxiliary crossing-tower system. In this paper, the suspension type auxiliary tower fitting system is divided into two types: the hard rod connection and the soft line connection. The influence of the arrangement of the wind pendulum, ice coating and anti-vibration hammer on the mechanical performance is considered. At the same time, the influences of the length of the bridge, the span and sag of the ground wire on the displacement and stress-strain of the bridge over the tower are analyzed. On this basis, it lays a certain theoretical basis for the structural optimization of the suspended tower auxiliary system.
Study on Controlling Technology for Surrounding Rock in Withdrawal Channel of Full-Mechanized Caving Mining with Large Mining Height Face of Super High Seam
Authors: Li Yalong , Li Cheng , Niu Shiwei , Chen Yongqiang 
Published: January 2021

Abstract
In order to solve the problems such as serious damage of the withdrawal channel and wall caving of tunnel side at end mining stage of 21604 fully-mechanized caving mining face of Huangyuchuan coal mine, study the deformation of surrounding rock of the withdrawal channel in 21604 working face and the law of destruction based on a large number of measured field data; the results show that when the working face is 10 m away from the withdrawal channel, the maximum roof subsidence is 300 mm, and the axial force of roof anchor rod reaches 52 kN, exceeding the anchoring force of anchor rod (50 kN); when it is 5 m away from the withdrawal channel, the maximum roof subsidence is 610 mm, and the axial force of side anchor rod reaches the peak value of 48 kN; when the working face passes through the withdrawal channel, the borehole stress meter reaches the peak value of 22 MPa, the withdrawal channel is seriously damaged, and the depth of tunnel side wall caving reaches 700 mm at maximum. According to the deformation characteristics of the surrounding rock of withdrawal channel, it is proposed to adopt the grouting reinforcement for the mining side and the anchor mesh cable combined with reinforced support for the non mining side and roof on the basis of the original support. It has been successfully applied in 21605 working face, and the support effect is remarkable.
Gas emission law and control method of working face in extra thick coal seam
Authors: Li Liangwei 
Published: January 2021

Abstract
Aiming at the problem of abnormal gas emission in fully mechanized caving face during mining, the law of gas emission from coal and rock in front of working face is studied, and the main factors of gas emission from coal wall and goaf are analyzed. This paper puts forward the method of gas drainage by surface drilling, which provides a new way to solve the gas overrun of upper corner, return air roadway and working face under the condition of high-intensity fully mechanized caving mining in extra thick coal seam, which has great engineering significance to ensure the safety and efficient production of the mine.
Analysis of Reservoir Prediction Method in Outspread no-well Area
Authors: Hu Shengxing 
Published: January 2021

Abstract
# oilfield has entered the late development stage of super high water cut, the comprehensive water cut of the oilfield has exceeded 96.7%, the production decline leads to the difficulty of maintaining stable production, it is imperative to increase the recoverable reserves. According to the oil test data of 6 outspread evaluation Wells deployed in the east outspread area of # Oilfield from 2008 to 2010, it is proved that this block has certain productivity. In this study, based on the sand-body characteristics of three and four belts based on the well logging data sedimentary facies map, combined with the seismic attribute interpretation results, the five belt sand-body was predicted. The development characteristics and distribution of the reservoir were clarified, which provided a reliable basis for the formulation of reservoir engineering plan and the realization of efficient development of the five strip extension block.
Analysis on stress characteristics of floor in thick seam working face at initial stage of fully mechanized top coal caving mining
Authors: Guo Liquan , Ou Yuanchao , Liu Chang 
Published: January 2021

Abstract
Coal seam working face mining will cause the redistribution of the stress field in the mining floor, which results in the deformation and damage of the coal and rock mass. The stress on the open-off cut floor of the working face at the initial stage of fully mechanized top coal mining of coal seam is different from other positions. Knowing the change of the stress characteristics of the rock formation in this area is significant for the safe mining of the coal seam. To investigate the characteristics of the stress changes in the rock formation in the open-off cut floor of the working face at the initial stage of fully mechanized top coal mining of thick coal seam, a distributed fiber-optic strain testing technology was used for dynamic monitoring of the stress distribution in the rock formation in the open-off cut floor of the working face, based on the working face of a mine in Huainan, China. The results showed that the change in fiber-optic strain distribution throughout the monitoring period corresponded well with the lithology of the formation. The fiber-optic strain in the ⑥ mudstone, ⑦ limestone, and ⑧ fine sandstone in the control area of the drilled fiber optic cable was subject to compressive strain, indicating that the floor of the working face was subject to overall compression due to the influence of the mining action. The fault structure limited the extent and magnitude of the effects of mining stresses laterally in the rock formation. The overall fiber-optic strain in the ④ sandy mudstone and ⑤ fine sandstone located on the outside of the open-off cut floor of the working face did not change significantly. The lagged impact distance of the mining stress was 35 m.
Experimental study on the influence of temperature and radiation on photovoltaic power generation in summer
Authors: Zhang Mingzhu , Liu Wanfu , Qi Wuqin 
Published: January 2021

Abstract
The power generation of photovoltaic systems is random and uncertain, which is the result of a variety of factors. However, there are few studies considering the interaction of two or more factors at the same time. Therefore, the influence of air temperature and radiation on photovoltaic power generation is considered in this paper, and based on the physical system, the experimental data is processed and analyzed through SPSS and DPS data analysis software and the multiple nonlinear regression analysis model. The processing results show that whether it is the quadratic and cubic nonlinear regression equations or the quadratic and cubic trend surface fitting degrees all reach a significant level, it can be used to reveal the law of the influence of two factors on the power generation under the test environment. The analysis results found that the combined effect of temperature and radiation on photovoltaic power generation is more complicated, but the overall impact of solar radiation is significant and greater than the air temperature; low temperature and high radiation, high temperature and high radiation and low radiation conditions have side effects on photovoltaic power generation; when the two are enhanced at the same time, it will help increase the photovoltaic power generation; when the two “one increase and one decrease”, the photovoltaic power generation first increases and then decreases, and there is an optimal air temperature, solar radiation, and maximum photovoltaic power generation.
Master-slave game Modeling of Energy subsidy pricing based on demand response
Authors: Wang Yongli , Yao Suhang , Zhou Minhan , Dong Huanran , Qu Daomin , Bai Jie 
Published: January 2021

Abstract
This paper presents a master-slave game model of demand response between power grid companies and multiple users. Firstly, the objective functions of power supplier and power user revenue are established by considering the customer satisfaction and power fluctuation cost. Then, the variables in the model are divided into strategy sets of the two players by the decision variable mapping set technique, and the equilibrium solution is obtained after multiple rounds of games. The example shows that the subsidy price of peak load period can be obtained by the grid company based on the model, and both the grid company and the user can benefit from the demand response.
Research on metal corrosion mechanism and inhibition measures of transmission and distribution equipment in Hunan
Authors: Huang Zhi , Feng Chao , Wang Jun , Liu Weike , Xie Yi 
Published: January 2021

Abstract
Through the analysis of the different mechanisms of corrosion of metal materials in AC and DC power transmission and transformation equipment and the factors affecting the corrosion rate, the impact of metal corrosion on the mechanical and electrical performance of electrical equipment was deeply studied. The selection of electrical equipment, material inspection and on-site anti-corrosion treatment were proposed. It was an effective measure to prevent corrosion failure of power transmission and transformation equipment.
Process for stabilizing fluorine in electrolytic aluminum spent pot lining by roasting method
Authors: Dongyue Wang , Haibin Wang , Chunlei Li , Yongrong Qi , Liting Fan , Li Peng 
Published: January 2021

Abstract
Electrolytic aluminum Spent Pot Lining (SPL) contains excess soluble fluoride, which can cause harm to the environment and human body when it seeps into the ground with rainwater. Therefore, it is necessary to convert the soluble fluoride into a chemically stable insoluble substance. In order to stabilize the fluoride ions of soluble fluoride, a roasting process is adopted. Through thermodynamic calculations and experiments, four factors of suitable calcium salt, calcium salt to SPL ingredient ratio, roasting temperature and time are determined to obtain the best operating conditions. The experimental results show that when the calcium salt is CaCl2, the ingredient ratio is m(CaCl2)/m(SPL)=0.5, the roasting temperature is 750°C and the roasting time is 5h, the amount of F-leaching is 10.64ppm, meeting the national requirements for the amount of F-leaching in electrolytic aluminum solid waste. Finally, the process route of roasting stable fluorine was determined according to suitable operating conditions.
Application method of natural light in architectural design
Authors: Hu Xueqing 
Published: January 2021

Abstract
Based on the purpose of improving the architectural design, we will make a simple discussion around the application of natural light, propose the use of natural light, and make a simple discussion. First, the article analyzes the requirements of architectural design. Secondly, it analyzes the use of natural light with examples. Finally, the strategy of using natural light is summarized. According to the analysis of architectural design practice, improving the utilization rate of natural light will play a positive role in reducing the consumption of energy and resources, and has the value of promotion and application.
Pyrolysis-gas chromatography/mass spectrometry to identification of the solid waste characteristic of imported polyamide recycled plastics
Authors: Zhang Ying , Luo Chuan , Yuan Lifeng , Xu Shanhao , Wang Hao , Lin Zhenxing 
Published: January 2021

Abstract
An analytical method for the determination of content of PA66 in PA6/PA66 blends by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) with silica (SiO2) as dispersant was established. After the sample was frozen and crushed into powder, silica was used as a solid dispersant mix with the sample, and the mixtures was injected. At 600°C cracking temperature, the corresponding cracking chromatogram was obtained, and the characteristic of PA66 on the cracking chromatogram of PA6/PA66 blend, the cyclopentanone, was selected as the quantitative peak to calculate the mass of PA66 in the PA6/PA66 blend. The content of PA66 in the dispersion was in the range of 0.50 g/kg ∼ 100 g/kg, and the results had a good linear relationship. The detection limit of the PA66 was 0.50 g/kg (the corresponding PA66:PA6 ratio was 0.5:99.5). The PA6/PA66 samples with known mixing ratio were measured, and the recovery of the results was 95.7%∼102.1%, and the relative standard deviation(RSD) was 1.6%∼5.9% (n=3). It can accurately determine the content of PA66 in PA6/PA66 blends, and provide technical support for the attribute identification of related imported recycled plastic solid wastes.

Introduction. Py-GC/MS; Recycled polyamide; Solid dispersant; Solid waste Characteristic identification
Self-heating incubator based on Fresnel lens and phase change energy storage
Authors: Guo Jinyu , Zhang Yan , Chen Xu 
Published: January 2021

Abstract
In recent years, with the continuous development of the Internet and catering industry, China’s takeout industry chain has gradually improved, and takeout has become an important force in the domestic catering consumption market. But at present, there are some problems in the market, such as high energy consumption and unsatisfactory insulation effect. This work is mainly divided into four parts: Fresnel lens focusing module, light tracking module, phase change energy storage module and delivery box module. Fresnel lens concentrator module focuses sunlight and converts heat energy. The tracking module tracks the position of the sun and strengthens the capture of solar energy by Fresnel lens. Phase change energy storage module stores heat energy and releases heat energy when needed. The delivery box module determines the overall framework. Compared with similar products, this work has the advantages of less energy consumption, better heat preservation effect and lower delivery cost.
Comparison of cost allocation models for transmission and distribution by voltage levels based on postage stamp method and peak load liability method
Authors: Ma Yanxia , Gou Shuaiyu , Zhang Weiqi , Wang Guanran , Zhang Zelong 
Published: January 2021

Abstract
In order to make the allocation of transmission and distribution costs more reasonable, the cost allocation models for transmission and distribution of different voltage levels based on postage stamp method and peak load liability method are constructed. Two models are used to calculate and compare the transmission and distribution costs of different voltage levels in a power grid company. The results show that the peak load liability method is more reasonable than the stamp method to allocate transmission and distribution costs among different voltage levels.
Automatic Analysis Method for Cause of Disqualification in Remote Test of The Primary Frequency Regulation
Authors: Li Yuanyuan , Gao Song , Li Jun , Yu Qingbin , Yan Qing , Liu Enren 
Published: January 2021

Abstract
In this paper, the factors affecting the correct operation rate of primary frequency modulation are analyzed in the light of the primary frequency modulation test of thermal power generating set and the assessment index of primary frequency modulation of power grid. Furthermore, effective solutions and countermeasures are put forward to make the unit meet the technical requirements and performance requirements of primary frequency modulation operation under various working conditions, and meet the requirements of safe operation of power grid and production of the unit.
NO Reburning by CH4-H2 Mixture under High CO2 Concentration in a Jet-Stirred Reactor
Authors: Liang Liwen , Li Pengfei , Zu Daohua , Hu Fan , Liu Zhaohui 
Published: January 2021

Abstract
New experimental and numerical results for NO reduction of CH4-H2 mixture were obtained in a 0-dimensional jet stirred reactor (JSR), the effects of the following four factors are considered: temperature(T): 800-1300 K; equivalence ratio(φ): 0.5-2.5; proportions of H2:CH4 in fuel: 0:6, 1:5, 3:3 and 5:1 (expressed in terms of FUEL-CH4, FUEL-1:5, FUEL-3:3 and FUEL-5:1, respectively); CO2 concentration in dilution gas: 0, 30% and 60% (expressed by terms D-N2, D-30%CO2 and D-60%CO2, respectively). Compared with pure CH4, mixing with H2 weaken the NO reduction in high temperature region, The NO reburning reduction rate of FUEL-3:3 increases first and then decreases with the increase of φ. The strongest reduction effect is obtained at T=1300 K and φ=1.2, and the reduction efficiency is about 70%. The NO reburning reaction was obviously inhibited by increasing CO2 concentration, but the effect was limited when the CO2 concentration reached a certain level. The reburning effect of FUEL-CH4, FUEL-1:5, FUEL-3:3 is approximative, but the reburning effect of FUEL-5:1 is significantly inhibited by high proportions of H2:CH4.
Planning Method of Diffusion Capability for the Multiple Resources of User-side Including Distributed Photovoltaic Access
Authors: Huang Jia-qi , Sang Zi-xia , He Ji-feng , Yan Jiong , Wang Si-cong , Yang Dong-jun , Lei He , Wang Ya-lei 
Published: January 2021

Abstract
High penetration of distributed renewable energy is the trend of future power and energy systems. Under the background of retail electricity market reform, retail price mechanism is of great significance to facilitate large-scale integration and consumption of user-side renewable energies. Considering the adoption of renewable energy is essentially the diffusion process of technological innovation, we presented an evaluation method for measuring the diffusion capability of distributed photovoltaic with the retail price mechanism. Firstly, based on the residential double-step tariff structure, the decision models were proposed for energy transactions between retailers and customers using Ramsey pricing theory. Secondly, by introducing the methodology of system dynamics, the market feedback mechanism between the electricity price design and the integration capacity of distributed photovoltaic was analyzed, thus the evolutionary model of distributed photovoltaic dynamic diffusion under the price policy was established. Finally, the criterion of stable diffusion of distributed photovoltaic based on Lyapunov function was developed in this paper.