bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Energy Management Strategy Based on Fuel Cell Health Status
Authors: Ren Xueshuang , Zhang Xin , Liu Dewang , Lv Qinyang 
Published: May 2021

Abstract
Energy management control strategy is one of the key technologies in the development of extended-range fuel cell vehicles. During the use of vehicles, fuel cell performance will decline, which limits the power output of the stack and the life of the stack. In order to control the power output of the fuel cell more reasonably, in this paper, the lumped parameter model of fuel cell is built based on Matlab/Simulink, and the vehicle model is built by AVL/Cruise simulation software. Combined with the fuel cell health state (SOH: State of Health) estimation method, the vehicle demand power and the state of charge (SOC: State of Charge) value of the power battery are used as input, and an energy management control strategy architecture based on the performance degradation of the fuel cell is designed. The simulation results show that the designed energy management can improve dynamic performance, and avoid frequent start and stop of the fuel cell, prolong the service life of the fuel cell, and further improve the economy of the vehicle.
Research on Cost Prediction of Power Transmission and Transformation Project Based on Combination Prediction Model
Authors: Ma Li , Wang Qixin , Liao Shuang , Guo Ting , Xiong Yi , Ming Yue , Zou Yuxin 
Published: May 2021

Abstract
Based on the project division of power transmission and transformation projects, this paper analyzes a large number of practical engineering cases, and summarizes the influencing factors of substation and overhead line project cost combined with the practical engineering experience of many experts, A number of cost control indicators are extracted, and a combination prediction model of project cost based on neural network and support vector machine is constructed. The actual project data are taken as samples for empirical research. The results show that the combination prediction model is feasible and accurate for the prediction of power transmission and transformation project cost, which provides a new idea and implementation method for the prediction of power transmission and transformation project cost.
Research on High Voltage Online Monitoring System for Dielectric Loss of Capacitive Equipment in Substation
Authors: Xu Minhu , Guo Yun , Zhang Dewen , Cao Rong , Shen Yubo , Han Siwei 
Published: May 2021

Abstract
The paper introduces the principle of on-line monitoring of the dielectric loss factor of capacitive equipment and the composition of the monitoring system. It explains the software-based mathematical analysis method and harmonic analysis method, and uses DSP for digital filtering. At the same time, the paper establishes an intelligent auxiliary monitoring terminal in the substation, uses the equipment ADP+ equipment protocol library to dynamically connect to various auxiliary monitoring equipment, uses signal frequency conversion sampling, alarm recording and other acquisition strategies to extract key equipment operation information, and hierarchically redundant storage data. Improve the real-time monitoring level of operating equipment and reduce the cost of operation and maintenance.
Research on the Improved Neural Network of Coal Price Forecast Based on Co-integration Theory
Authors: Gao Luhui , Wang Guoqing 
Published: May 2021

Abstract
China is a big coal consumer, and changes in coal prices will have a huge impact on the entire market economy system. In this paper, aiming at the prediction of coal price, the grey correlation analysis method is firstly used to describe the correlation degree between the main factors and the coal price, and the main influencing factors are sorted according to the correlation coefficient. Finally, it is determined that a coal price prediction system needs to be established on such indicators as coal reserves, raw coal production, total coal consumption, the proportion of coal in the energy mix, coal road traffic volume, coal imports, etc. Next, the quantitative indicators are combined with the economic cycle and cointegration theory to study, with the help of cointegration theory to improve the traditional neural network, so that it is more suitable for the prediction of coal prices. Finally, this paper obtains an effective coal price prediction model, which can better predict and analyze the future coal price and can play an important reference role in the formulation of government policies.
Factors Influencing Strategic Change of New Energy Enterprises: An Analysis Based on Time Perspective
Authors: Zhang Chunhong 
Published: May 2021

AbstractNew energy enterprises are important production and operation units engaged in the nature of new energy in the national economy. With the development of modern society, it is crucial to have a deep understanding of new energy enterprises, especially in the face of changing environment, and how to carry out strategic transformation of new energy enterprises. In a constantly changing environment, strategic change is a key issue and a central issue in the field of management and strategy. Time is the foundation of all research on strategic change, whether or not it is recognized by existing research. In this paper, the factors that influence strategic change in new energy companies are critically reviewed from a temporal perspective. Firstly, the development status of new energy enterprises is analyzed, the strategic change is defined, and then the influencing factors are obtained by integrating the relevant studies of the time dimension in the change activities. Based on the time perspective, the dynamic understanding of the strategic change process of new energy enterprises can be improved.
Influence of typical composite insulators defects on axial temperature based on simulation analysis
Authors: Luo Simin , Luan Le , Cui Yiping , Xu Shuo , Guo Qianwen , Liu Tian 
Published: May 2021

Abstract
In this paper, the finite element analysis software comsol is used to design two different defect models on the short-string composite insulator model, namely, the air gap defect and the mandrel-damp defect. The thermal field of composite insulators with two kinds of defects is simulated, and comparing the axial temperature gradient changes of mand-sheath interface under normal condition and under the condition of defects. The results show that local heating does not occur when the composite insulator contains an air gap defect without partial discharge.
Research and Analysis of Finite Difference Method and Least Square Method Identification Algorithm Based on CO2 Environmental Monitoring
Authors: Zhang WanJun , Zhang Feng , Zhang Jingxuan , Zhang Jingyi 
Published: May 2021

Abstract
According to the physical process of convection and diffusion followed by CO2 and the working principle of HVAC, a PDE model of indoor CO2 concentration is proposed according to the working conditions of indoor air flow in and out. The physical significance and selection principle of each component, initial and boundary conditions in the model are analyzed in detail. In order to prove the validity of the model, this paper, based on the different conditions of initial value and boundary value, puts forward the PDE model of indoor CO2 concentration The model is solved and simulated, and the results show that the dynamic evolution process of the model is consistent with the actual physical process; for the unknown parameters in the model, the finite difference method and the least square method are combined to realize the identification of the unknown parameters of the model, and the effectiveness of the identification method is verified by simulation.
Overview of intelligent vehicle core technology and development
Authors: Su Jintao , Lou Jianping , Jiang Xiaolu 
Published: May 2021

Abstract
This paper introduces the key technology progress of intelligent vehicle, and analyzes the sensing technology, recognition and decision technology of intelligent vehicle. Then the tracking technology of intelligent vehicle, vehicle attitude and path planning are reviewed. Finally, the research status of intelligent vehicle is summarized, and the research direction of intelligent vehicle in the aspect of integrated control is pointed out, which lays a theoretical foundation for the further solution of intelligent vehicle control.
Improving Thermal Comfort in Aircraft Cockpit Based on Optimization of Supply Air Grille
Authors: Hu Xianglong , Liu Yudi 
Published: May 2021

AbstractPilot’s thermal comfort and performance are directly affected by air flow field and temperature field in cockpit. A three-dimensional cockpit model of a certain civil aircraft is established, and the distribution of air velocity and temperature is obtained with the method of computational fluid dynamics (CFD). Aiming at the problems of high local air speed and uneven temperature distribution in the cockpit, two new supply air grilles are proposed. The results show that one of the grilles can obviously optimize air flow field and temperature in the cockpit and improve the thermal comfort of the pilots.
Thermal Assessment of Aircraft Fixed Leading Edge Compartment with Simulink and CFD Simulation
Authors: Hu Xianglong , Liu Yudi 
Published: May 2021

Abstract
Fixed leading edge is an important part of aircraft wing, and its design should consider the influence of temperature. The temperature of the fixed leading edge compartment is affected by the high temperature and high pressure gas inside the bleed air duct and the ambient temperature outside the skin. The temperature, pressure and velocity of the gas inside and outside the compartment are quite different, so it is difficult to converge by computational fluid dynamics (CFD) analysis directly. In this study, the method of combining Simulink with CFD is proposed to solve the temperature of fixed leading edge compartment in a certain civil aircraft. The calculation method is easy to converge, and the obtained temperature can be directly used in the design of fixed leading edge structures to ensure aircraft safety.
Energy Function Based Transient Stability Analysis of Power System Integrated with DFIG
Authors: Peng Kaiqin , He Anqi 
Published: May 2021

Abstract
The access of large-scale wind power seriously threatens the safe and stable operation of the power system. In this paper, a novel energy function based transient stability analysis approach is proposed for the power system integrated with Double Fed Induction Generator (DFIG). First, the network structure-preserving model of power system integrated with DFIG is established, where generators adopt 3th order electromechanical model, and its energy function is deduced. Next, the energy function of post-fault system is approximately calculated by trapezoidal integral path, and energy function based transient stability criteria are put forward to access the stability of the post-fault system. Finally, the New England-39 bus system integrated with DFIG is used as test system to investigate the validity of the proposed approach.
Safety Analysis of Flooding Accident in Shallow Water for Offshore Floating Nuclear Power Plant
Authors: Gong Daxin , Ye Ranling , Wangjiang E 
Published: May 2021

Abstract
The Offshore Floating Nuclear Plant (FNPP) integrates a nuclear reactor into a floating facility. A typical FNPP developed to supply desalinated water and electric power is analysed in this paper. Flooding accident is a postulated ship accident which should be considered in designing the FNPP in order to reduce harmful radiation impacts on the crew and environment. The integrity of the containment, the safety of spent fuel assemblies and the safety of the reactor core are the key factors to evaluate the accident consequences. Flooding accident in shallow water is investigated in this paper. For FNPP, the containment has sufficient strength to resist pressure from outside induced by seawater. Meanwhile, the seawater supplies enough heat sink for the cooling of the spent fuel assemblies. In order to investigate the safety of reactor core, a RELAP5 model with Passive residual heat removal system(PRHR) is used. The results suggest that the natural circulation in the primary system can be established and the residual heat can be carried out efficiently. The reactor core can keep safe during the flooding accident.
Design of an Intelligent Inspection Robot for Underwater Pipelines
Authors: Zhang Zhiyue 
Published: May 2021

Abstract
This paper will introduce the design of an intelligent inspection robot for underwater pipelines. The whole device is divided into detection module, control module, drive module and housing. Among them, the detection module is the camera and the head, the control module is mainly the Raspberry Pi motherboard, the drive module includes the battery, motor, motor driver. The device through the camera module feedback to the Raspberry Pi to make decisions, and this decision through the IO port output, and then through the motor drive module to drive the motor, the motor to make speed and direction of adjustment. This device is proposed to use stepper motor for robot movement method.
Research and analysis on the dustproof structure of low voltage switchgear
Authors: Sun Wei , Wang Bin 
Published: May 2021

Abstract
This study improves the dustproof effect by changing the appearance structure of the low voltage switchgear. The exterior structure of the low-voltage switchgear adopts S profile to prevent dust from entering the cabinet body and make dust proof treatment at the connection of the cabinet board parts. Through the dust experiment, compare the protective effect of low-voltage switchgear with common appearance structure, low-voltage switchgear with common appearance structure after dust-proof processing and the new type of structure. Finally, it is concluded that the low-voltage switchgear can effectively reduce the entry of dust by increasing the complexity of dust entry channels, and the S-shaped appearance structure can reduce more than half of the dust entering compared with the ordinary appearance structure.
Assessment and Analysis of the Global Development of Integrated Energy
Authors: Zhang Zhongping , Wang Jianguang , Zhou Yuhao , Wang Jing , Cao Chunlan , Li Xinxuan 
Published: May 2021

Abstract
With the acceleration of the transformation of global energy structure, in order to meet the demand for safer, more efficient and cleaner energy in the new era of our country, it is imperative to build a modern energy transformation and system, and integrated energy services gradually play an increasingly important role in the supply side and consumption side. Integrated energy service is a kind of energy supply and service mode to meet the diversified energy production and consumption of end customers. It focuses on the planning, design, construction, operation and service of cold, hot, electric, gas and other systems in three aspects of energy supply, energy use and service, deeply integrates the Internet of things, big data, artificial intelligence and other technologies with energy to form a dynamic level of source, network, load and storage Balanced integrated energy supply and service integration of modern energy system. Based on the analysis of the current situation of foreign and domestic integrated energy, this paper puts forward suggestions and prospects for the development of integrated energy services.
Research on Power Line Carrier Communication Based on HVDC
Authors: Chen Dong , Miao Wei , Li Long 
Published: May 2021

Abstract
This paper mainly studies the control of LED lamps under the condition of centralized DC power supply by power carrier mode, and modifies the mature power carrier scheme in AC system to adapt to the DC system environment and realize reliable communication in DC system. Through the analysis of system functional requirements and the comparison of existing communication technologies, the overall architecture of DC tunnel lighting system is proposed. The system adopts two-tier structure, including monitoring center, communication controller and HVDC tunnel lighting control terminal. This system realizes the master-slave monitoring of the communication controller to the control terminal of HVDC tunnel lamps, and puts forward the modification scheme to the conventional power carrier scheme, and verifies the improved power carrier scheme of DC system through the Qijiashan tunnel lighting project.
Research on Electric Vehicle Battery On-line Management System
Authors: Qi Yanxing , Yang Xueyin 
Published: May 2021

Abstract
This paper takes STM32 MCU as the control core to make deep research on the electric vehicle battery online management system. The internal resistance detection method and Kalman filter method are used to estimate the SOC value, and the equalization control circuit is used to make the SOC value of each single battery tend to be consistent, and the equalizing protection circuit is used to effectively protect the battery. Debugging and experimental results show that the system can accurately estimate the SOC value, solve the problem of inconsistent SOC value of each single battery, and effectively improve the efficiency of the battery.
Research on the Source of Subsidies Funds for Power Demand Response
Authors: Liu Junhui , Hua Jun , Fu Han , Li Hujun , Yang Qinchen 
Published: May 2021

Abstract
With the upgrading of residents’ consumption and the continuous improvement of electrification level, Henan’s power consumption has maintained rapid growth. There is a shortage of power supply under the constraints of time, structure, and environmental protection. The implementation of power demand response can smooth peak loads, promote supply and demand balance and operational efficiency. The basis for the successful implementation of power demand response is to have a stable and full source of subsidy funds. The feasibility of three subsidy sources of demand response under the current business model is discussed in order to provide useful reference for provincial power grid enterprises to organize and carry out demand response work.
Application of BIM Technology in Cost Control during the Stage of Production and Transportation of Assembly Building
Authors: Zhang Xinyu 
Published: May 2021

Abstract
Green building has become an important evaluation criterion for house construction. Prefabricated buildings are an effective means to achieve the goal of green building. However, the high cost during the construction process hinders the popularization and application of prefabricated buildings. Based on the current research, Building Information Modeling (BIM) Technology is an advanced technology in the construction industry, which has high efficiency in cooperation with prefabricated buildings. Based on BIM technology, it has better development in cost control of prefabricated buildings. Compared with traditional buildings, it has fast construction speed, high safety level, environmental protection, and other advantages. This paper analyzes the cost of influencing factors in the production and transportation stage, and establishes the cost management process of prefabricated buildings based on BIM technology. It analyzes the application of BIM technology from cost control, cost accounting, and cost analysis at this stage and finally verifies the feasibility of cost management based on BIM technology by taking a prefabricated building as the research object.
Research on Temperature Monitoring Method and System Design for Key High Voltage Equipment of Wind Farm
Authors: Xie Baoyu 
Published: May 2021

Abstract
This paper focuses on the temperature detection of high-voltage equipment in wind power plant, puts forward the surface acoustic wave measurement method, and deeply studies the design process of surface acoustic wave sensor device and the design scheme of monitoring system. In different process materials of piezoelectric substrate and antenna design mode, there will be great differences in the transmission efficiency and anti-interference ability of surface acoustic wave. Therefore, the influence of surface acoustic wave on the performance of surface acoustic wave sensor device is possible Testing and setting the surface measurement parameters can improve the measurement performance. In the aspect of detection system, the typical key temperature monitoring equipment of high voltage switch cabinet in wind farm is selected to form a practical deployment scheme, which realizes the integrated functions of automatic temperature measurement, parameter optimization and adjustment, alarm and so on. The research and design method in this paper has great practical application value in the operation and control of new energy system.
Stress-strain state of rock mass and lining when constructing underground turbine hall of hydropower plant
Authors: Abdulloev NM , Baryshnikov DV , Gakhova LN , Khmelinin AP 
Published: May 2021

Abstract
Numerical modeling was performed for stress-strain state of the rock mass and lining of underground turbine hall of Rogun hydropower plant. The hall is located in a rock mass at great depths. Numerical modeling was conducted using the method of boundary integral equations based on the model of linearly elastic quasi-isotropic medium. The character and features of forming inelastic deformation zones near the contour of turbine hall cross-section are found. The regularities of distribution of rock mass and lining stress-strain state are determined as well.
Investigation of hydraulic fracture growth near a mine opening
Authors: Azarov AV , Patutin AV 
Published: May 2021

Abstract
The behavior of a hydraulic fracture near the mine opening in a plane-parallel formulation has been investigated. The case was considered, when the rock was under hydrostatic pressure, and the initiating crack was oriented in the direction of mine opening. It is found that the fracture path is greatly influenced by the ratio of hydrostatic pressure and critical tensile stress of rock. It is shown that when the hydrostatic pressure increases with respect to critical tensile stress, the fracture begins to deviate from the mine opening earlier and does not reach its surface. It is also shown that under various conditions, fractures cannot bypass the mine opening completely due to the occurrence of severe strains in the area between the opening and fracture.
Stress-strain state of a rock mass with a fracture in opening roof
Authors: Krasnovsky AA 
Published: May 2021

Abstract
The influence of a fracture formed in the opening roof on stress-strain state of the rock mass is considered. The relationships determining displacement and stress components at the boundary of an opening with rectangular shape, on contact lines of the layers and on the line containing fracture are written. The examples of numerical implementation are given. The analysis of the obtained results is carried out.
Mechanical compression effect on gas filtration through the crack filled with acrylate composition
Authors: Rybalkin LA , Shilova TV 
Published: May 2021

Abstract
Hydraulic fracturing is a promising method used for increasing the permeability of a coal seam. Formation of an extensive network of drainage cracks contributes to increased gas recovery of coal. In this case, a negative factor is the breakthrough of cracks formed in the mine workings. In order to challenge this problem, it is proposed to screen mine workings with an additional crack filled with acrylate polymer containing solid inclusions, which prevents the closure of crack edges under the impact of rock pressure. The paper presents the results of experimental studies of acrylate screen gas permeability dependence on rock pressure.
A downhole uniaxial pressure gauge to determine elastic properties of hard rocks
Authors: Serdyukov SV , Drobchik AN 
Published: May 2021

Abstract
The paper presents experimental equipment meant for determination of elastic properties in hard rocks by means of creation of adjustable uniaxial pressure on open well walls perpendicular to the well axis, measurement of deformations in a wide range of loads and for automatic recording of the observed data.