bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal Scheduling Strategy for Electric Vehicle Charging Based on Particle Swarm Optimization Algorithm
Authors: Liu Dunnan , Wang Lingxiang , Li Hua , Gao Yuan , Peng Xiaofeng , Liu Mingguang 
Published: July 2021

Abstract
The development of power demand side resources provides new opportunities and challenges for the advancement of energy revolution. Flexible loads such as electric vehicles provide a large number of load regulation resources for the power demand side, while distributed energy sources provide energy supply for the power demand side. Reasonable utilization of these flexible loads and energy supply facilities will be conducive to promoting the balance between supply and demand of the power demand side, promoting the development of new energy and improving the social and economic benefits. Considering the resource characteristics of electric vehicles and distributed energy, this paper sets up an optimal scheduling strategy based on particle swarm optimization algorithm. The grid-connected consumption of distributed energy is realized through charging and discharging load regulation of electric vehicles, which effectively saves the grid-connected cost of distributed energy and improves the market income of distributed energy operators and electric vehicle operators.
Research on System Optimization of Integrated Energy Park Based on Time-sharing Electricity Supply
Authors: Ma Chunyan , Duan Qing , Sha Guanglin , Zhao Caihong , Gao Jian 
Published: July 2021

Abstract
Integrated energy system can improve the overall utilization efficiency of energy, and its advantages are remarkable. The integrated energy system covers various types of energy, such as electric energy, natural gas, and so on,which can realize the integration and complementarity of various energy sources in the park, which can improve the comprehensive utilization efficiency of the park system as a whole and reduce the cost of comprehensive energy use. In this paper, a multi-energy coupling energy system is constructed based on a typical park integrated energy system. By modelling the typical equipment in the system and using the time of using supply as the guiding strategy, the particle swarm optimization algorithm is used to optimize the typical days of the park, and the optimal operation strategy of the equipment in the system is obtained, which can significantly alleviate the peak and valley phenomenon between the system and the superior network.
Defect Signal Detection of Station Process Pipelines Based on the BP Neural Network
Authors: Jiang Yi , Liu Yuting , Yu Dongliang , Li Feng , Chen Ge , Di Xin 
Published: July 2021

Abstract
In recent years, leakage, rupture, and perforation accidents in oil and gas pipelines caused by corrosion have increased significantly. Therefore, the online, nondestructive testing of oil and gas pipelines has become essential to maintain their structural integrity. Ultrasonic guided wave detection technology presents advantages, such as high detection efficiency and complete coverage of the pipeline body, which is conducive to popularization and application. This paper considered the natural gas transmission station as the research object, while ultrasonic guided wave technology was used for detection. Ultrasonic guided wave equipment was used to detect the field process pipeline and experimental pipeline, obtaining data samples of the defects and welds. Defects were automatically identified via data processing by combining the characteristic signal method and the BP neural network. The results indicated that the neural network displayed a recognition accuracy of 80.9% for the features and defects in the test samples. By combining the characteristic signal method and the BP neural network, the defect recognition technology can reduce the subjective influence of inspectors while improving recognition efficiency and accuracy.
Effect of microbial consortium on Ricinus communis L. seedling in Pb/Zn-contaminated soils
Authors: Li Xue , Yang Fengyi , Wu Meiqun , Luo Fang , Wang Jing , Li Tingjie 
Published: July 2021

Abstract
In order to investigate the effects of lead-zinc resistant microbial consortium on growth of Ricinus communis L., fungus L14 and the bacteria X8 from the soil in the lead-zinc mining area were collected as the microbial consortium of heavy metal-tolerant plant growth-promoting. The effect of compound functional flora on the growth of Ricinus communist L. seedlings was investigated. As the concentration of lead and zinc increased, the growth indicators of castor plant seedlings all reduced sharply. It can be seen that the higher the concentration of lead and zinc was, the greater the toxic effect on castor, and the more inhibited root growth. In inoculate group, the root length and stem height increased by 2cm and 2-3cm on average compared with the non-inoculated group.
Research on New Energy Technology in Energy-Saving and Emission-Reduction Low-Pollution Aerospace Engine
Authors: Nie Jinlong , Chen Lei 
Published: July 2021

Abstract
Under the national energy technology call for energy saving and emission reduction, the paper uses FLUENT software to simulate three-dimensional, two-phase, turbulent combustion in the combustion chamber of a certain type of aeroengine at the maximum and ground idle state and calculates the generation of CO and UHC. The value of temperature field, velocity field and concentration field. Through simulation, it is found that the maximum temperature of the flame is located at the axial position of the main combustion hole. The flame temperature begins to decrease after reaching the maximum temperature near the main combustion hole. In the temperature field of the combustion chamber outlet, the maximum temperature of the outlet section is 1820K and the average temperature is 1342K.The temperature distribution is relatively uniform overall. CO and UHC are mainly generated under low operating conditions, but the oil-gas ratio has a greater impact on pollutant emissions.
Vertical seismic analysis of roof truss in Indonesia
Authors: Chen Shixi , Huang Youqiang 
Published: July 2021

Abstract
Based on a 1×680MW thermal power plant in Indonesia, the large-scale general finite element software ABAQUS was used to analyze the vertical seismic time history of the steel roof truss of the main plant of the thermal power plant, and study the vertical seismic effects of different seismic areas and site types on the steel roof truss Impact. Through analysis, a table of vertical seismic action coefficients of steel roof trusses with different parameters (the ratio of the standard value of vertical seismic action to the representative value of gravity load in frequent cases) is given for future engineering design reference.
The effect of five kinds of colloidal polymers for seed germination and growth in sand
Authors: Zhang Wenxu , Guo Lulu , Chen Jing , Liu Shengfang , Wang Yifan , Chen Wenxiao , Lei Ziqiang 
Published: July 2021

Abstract
The effect that five kinds of colloidal polymers did to seed germination and growth in sand was studied through orthogonal experiment in this paper. The water consumption, germination rate, growing and shoot length of five kinds of plants were investigated by changing the type and amount of natural colloidal polymers, soil and bio-fertilizer. Furthermore, the soil crust effect and the biomass of soil around sand seeds were analyzed in different conditions. It can be seen from the analysis of variance result that the types of colloidal polymer played a crucial role in water consumption of seed, and the water consumption was the smallest when Konjac Glucomannan was added with 911.14g/g. And the primary factor was plant species that effected germination rate of seeds, growing and plant height. Besides, the soil depth, plant species, polymer type and mass of polymer significantly influence the soil crust effect all. However, the amount of bio-fertilizer played an inhibiting part on biomass of soil.
Torsional vibration test and analysis of an internal combustion engine power assembly by RLV-5500
Authors: Wu Ji , Long Jun , Zhang Chunlei 
Published: July 2021

Abstract
The vibration characteristics of marine power plant and propulsion system shafting directly affect the navigation safety of the ship. Shafting torsional vibration is an important parameter to evaluate the stability and reliability of shafting. The demand of ship shafting torsional vibration measurement is gradually developing towards high resolution and high accuracy. According to the characteristics of ship shafting installation and operation, this paper selects an internal combustion engine powertrain as the test object, and uses rlv-5500 rotary laser vibration measurement system to test the shafting torsional vibration. The time-frequency analysis of the test results is carried out to calculate the comprehensive angular displacement and the angular displacement amplitude of each harmonic order. The maximum comprehensive amplitude of crankshaft free end torsional vibration is 0.33 °. The crankshaft will not be damaged by torsional vibration.
Study on The Mechanism of Flexible Demand-Side Resources Participating in The Electricity Market Under New Situation
Authors: Liu Dunnan , Wang Lingxiang , Gao Yuan , Li Hua , Pang Bo , Song Li , Liu Mingguang 
Published: July 2021

Abstract
The high proportion of renewables added to the electricity system and the “dual carbon target” require more adjustable resources to keep the power system running smoothly. The flexible resource of demand side is an important adjustable resource, which can help the safe and reliable operation of power system. This paper considers the way that demand-side resources participate in load regulation through the power market, discusses the types and characteristics of demand-side resources, analyses the trading mechanism of demand-side resources participating in various types of markets, and puts forward the benefit calculation methods under different scenarios, which has important reference significance.
Research on the reaction temperature of PTFE/Al reactive materials
Authors: Zou Xuan , Zhou Jingyuan , Ran Xianwen , Wu Yiting , Liu Ping , Tang Wenhui 
Published: July 2021

Abstract
In order to learn about the energy release characteristics of PTFE/Al (Teflon/aluminum), samples with a mass ratio of 73.5: 26.5 (PTFE: Al) were designed by the molding-sintering process. The drop hammer device and spectrometer system were selected for the experiment. By analyzing the spectrum of the reaction flame, the reaction temperature was calculated. At different drop heights, the reaction temperature changes little, and the standard deviation of reaction temperature of PTFE/Al is 14.90. We believe that the reaction temperature of PTFE/Al does not change with the height of the hammer drop, and the average reaction temperature of PTFE/Al under different drop hammer heights is 2733.41±14.9K.
Spatial Sensitivity Analysis and Structure Design of the Ring Electrostatic Electrode
Authors: Chen Jiange , Jiao Min , Li Dewen , Lu Siyuan , Yan Gelai 
Published: July 2021

Abstract
In order to accurately detect the dust concentration in the open space, this paper designed a dust concentration sensor based on the ring electrode of the electrostatic induction method. According to the size of the fan and the maintenance needs of cleaning in the pipeline, the inner diameter of the ring electrode was designed to be 40mm. The high-fidelity three-dimensional finite element model of the ring-shaped detection electrode was established by COMSOL software, and the electrostatic field distribution in the ring-shaped electrode was simulated. The spatial sensitivity of the ring electrodes was calculated under the condition of different length and thickness of the ring electrode. By analyzing the distribution of the spatial sensitivity of the ring electrode, the length of the ring electrode was designed to be 40mm and the thickness was designed to be 2mm, which ensure that the axial spatial sensitivity of the ring electrode is relatively large and the radial spatial sensitivity is relatively uniform. This research result provided a reference for the structural design of the ring electrode.
Prediction of the thermal safety of nitrocellulose package in large scale
Authors: Wang Qiong , Du Jiaojiao , Gu Yan , Yu Silong , Zhang Linjun 
Published: July 2021

Abstract
In order to assess the risk of nitrocellulose (NC) package atuo-ignition in warehouse, the three kinetic parameters of thermal decomposition of NC were calculated based on DSC curves using commercial software AKTS-kinetic module. On this basis, effects of ambient temperature (Ta), initial temperature of the package (T0) and cylinder diameter of package on time to ignition (τ) were studied using AKTS-thermal safety module. Results showed that as Ta and/or T0 increases the τ decreases exponentially, but the τ at different package dimensions is related to the Ta. More importantly, for a certain Ta, the τ doesn’t always change monotonously with the dimension, there is a dangerous dimension which are easier to ignite. It indicates that big risks exist when trying to predict the safe status of a certain NC package by extrapolation.
The comprehensive treatment of industrial wastewater and its recovery and utilization technology
Authors: Han Yun 
Published: July 2021

Abstract
With the acceleration of industrialization in China, the phenomenon of industrial pollution has become more and more serious, which has caused a great hazard on the ecological environment. The quantity and scale of industrial wastewater continue to increase, and higher requirements are put forward for the treatment of industrial wastewater. Firstly, this paper analyzes the function and importance of industrial wastewater treatment. Secondly, we proposed the comprehensive treatment of industrial wastewater and its recovery and utilization technology. The comprehensive treatment of industrial wastewater is completed by the backwashing of biochemical tank, the dehydrating of sludge thicker and the effluent from disinfecting tank. The recovery and utilization technology of industrial wastewater is designed. By recovery industrial wastewater, the usage amount of reuse water is increased.
Study on Technology of Bulge and Crack Repair in Epoxy Asphalt Pavement of Steel Bridge Deck
Authors: Qin Kesheng , Yang Fei , Fu Jiancun , Han Tao , Liu Fangtao 
Published: July 2021

Abstract
This project mainly combines the operation characteristics of epoxy asphalt pavement of steel bridge deck in the north frozen sea environment, and judges the cause and degree of damage of epoxy asphalt pavement of steel bridge deck according to the manifestations of swelling disease and related detection indexes. Combined with the formation mechanism of the disease, the corresponding treatment scheme of bulge and crack is put forward, so as to achieve the purpose of identifying and treating the disease of epoxy pavement of steel bridge deck.
Experimental study on the treatment of rural domestic sewage by modified MBBR sludge and bio-membrane coupling integrated process
Authors: Zhu Xiaoming , Shu Mengzhao , Ge Jun , Wang Xiao , Huang Shenglin 
Published: July 2021

Abstract
Experimental study on the treatment of rural domestic sewage by modified MBBR sludge membrane integrated process was carried out, to investigate the removal of organic matter and nitrogen and phosphorus pollutants in sewage by this process technology under different pollution loads. The results showed that the COD, NH4
+-N, TN and TP concentration of the influent were 114-214 mg/L, 3.49-16.3 mg/L, 14.4-58.5 mg/L and 0.94-2.68 mg/L, respectively. The COD, NH4+-N, TN and TP concentration of the effluent of the modified MBBR sludge membrane integrated process can meet the Class I level A standard of discharge standard of pollutants for municipal wastewater treatment plant of China. The comparison of process performance under different pollution load conditions showed that the process equipment had good shock load resistance ability. The effluent indicator of the process equipment basically met the Class I Level A standard. Therefore, the modified MBBR sludge membrane integrated process is used in rural domestic sewage treatment, and has a higher comprehensive removal ability of pollutants.
Analysis of Air Pollution Influencing Factors of PM2.5 Secondary Particles by Random Forest
Authors: Zheng Hongbo , Wang Zhengyu 
Published: July 2021

Abstract
Aiming at figuring out the influencing factors of PM2.5 secondary particles, there is a new way of using random forest model to handle it. Compared with using correlation to measure the relationship between various single factors and PM2.5, in this paper, the random forest can comprehensively consider the overall factors including meteorological and other air pollution factors. In a case of Dalian, the results show that NO2 is the primary factor of PM2.5 in the first and fourth quarter, and O3 is the primary factor in the third quarter. From the perspective of big data, this is a persuasive way to provide reference for PM2.5 pollution control in different quarters.
Research and Interpretation of the Solid Waste Clause in Environmental Protection
Authors: He Jinqian , Zhang Leijing 
Published: July 2021

Abstract
How to interpret the relevant provisions of solid waste in the Environmental Protection Tax Law is an urgent problem to be solved during the implementation of the Law. Combined with the relevant provisions of this Law, the Regulations on the Implementation of the Environmental Protection Tax Law and other closely related laws and regulations, it can be found that medical waste should be regulated under the solid waste clause, while radioactive waste should be put into the three tax categories of “air pollutants, water pollutants and solid waste” in the Environmental Protection Tax Law. The inconsistency between the Regulations on the Implementation of the Environmental Protection Tax Law and the Environmental Protection Tax Law in terms of solid waste tax items is mainly resolved by delegating power to local governments.
Numerical simulation of air flow and heat transfer in air refrigerated containers using clean energy technologies
Authors: Zhao Xudong , Huang Yujun , Chen Jianping , Su Peigang , Sha Feng , Yuan Yuan 
Published: July 2021

Abstract
Air refrigerated containers are important links and key equipment for air cold chain transportation. The refrigerated container cools the goods through the cold air circulation in the container to achieve the purpose of refrigeration. The key to the design of aviation refrigerators lies in the numerical simulation of the cold air flow and temperature distribution in the containers to determine the best air duct design and optimal air outlet arrangement. This article briefly analyzes the structure of the air refrigerated container, establishes the mathematical and physical models for numerical analysis, and then analyzes the two methods. At the same time, temperatures are tested in physical container with temperature measuring devices and conducts a comparative analysis with numerical simulation. The results show that the existing top on the basis of the air supply, assign a flow channel to each small tuyere and remove the small tuyere beside it. This situation is better for both flow and heat transfer. Temperatures in tests are similar with numerical simulation.
Analysis of Complex Pollution and Control of Atmospheric PM2.5 and Ozone in Qinhuangdao
Authors: Wang Lei , Jin Tiantian , Suo Na 
Published: July 2021

Abstract
This paper used the air pollutant monitoring data and meteorological observation data to analayse the compound pollution process of PM2.5 and ozone that appeared in Qinhuangdao City from October 8th-11th, 2020. The causes of pollution were analyse from high-altitude situation, meteorological conditions, pollutant conversion and zone transformation. The results showed that this pollution was affected by the high humidity, static stability and regional transmission. The gaseous pollutants were transformed in the strong oxidizing air which further pushed up the concentration of particles.
Thermal Environment Simulation and Ventilation Strategy in Tunnels for Heating Pipes and Power Cables
Authors: Wang Xuemei , Zhang Tiantian , Tan Yufei , Liu Zhuo 
Published: July 2021

Abstract
The thermal environment of the utility tunnel is important for the safe operation and maintenance of the pipeline system. When the power cables and heat pipelines are installed in the utility tunnel at the same time, the compatibility of thermal environment and the ventilation scheme need to be studied. Therefore, in this paper, the temperature field and the effect of air change rates in the utility tunnel were studied by using numerical simulation method. Numerical results show that the heat pipelines and the power cables have good thermal compatibility in the same compartment. Moreover, reducing ventilation volume is an effective way to increase the temperature and the optimal air change rate is between 3h−1-4 h−1. Therefore, it provides reference for safety operation and standardization study of the utility tunnel.
Research on the Active Online Voltage Equalization and Desulfurization Technology of Battery
Authors: Li Junling , Qu Bingzhao , Liu Xiangjian , Yuan Yulin , Peng Weijun 
Published: July 2021

Abstract
As a DC system, the performance and stability of battery play a vital role in the hydraulic, electric and telecommunication industries. In the process of charging and discharging, some batteries in the battery pack will be damaged in advance due to the voltage inconsistency among battery cells, and the service life will be greatly shortened. Therefore, it is necessary to charge the battery evenly to solve the above problems, prolong the service life of the battery and further improve the reliability of the battery. The equalization technology proposed in this paper adopts the double closed-loop control mode of gap-type priority charging, adopts the optical MOS switch array inside, and uses the switching power supply technology to transfer the power of high-voltage batteries to low-voltage batteries by means of energy transfer. Electricity transfer is bidirectional and parallel, so as to achieve battery voltage balance.
Prediction of heavy metal Cd content in basin soil with time series input
Authors: Wang Shengwei , Zhan Yulin , Ji Hao , Li Ping 
Published: July 2021

Abstract
The content of heavy metal Cd in basin soil is important to human health and environmental management. Traditional pollution prediction models have problems such as a single input dimension and the inability to retain historical legacy information of time series data. This paper uses high-dimensional time series data as model inputs. A Backward Propagation Network (BP) and two variants of Recurrent Neural Network (RNN) named Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) networks were employed to develop Cd content prediction models of basin soil heavy metal. According to the experimental results, we explored the performance of different models about the prediction of the heavy metal Cd content. Experimental results show that the BP neural network converges faster but has a greater error. Compared with the BP neural network, the LSTM neural network error is decreased by 0.0895, 0.3124, 0.0159, 0.1533 and the GRU neural network error is decreased by 0.0743, 0.2985, 0.0259, 0.1441 in term of MAE, MAPE, MSE, RMSE. The experimental results showed the GRU is more efficient in time and space compared to the LSTM neural network. It is more suitable for high-precision content prediction of the heavy metal Cd.