bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Solid Solution Process of High Strength Casting Al-5.0Cu-0.5Mn Alloy
Authors: He Xiaohui , Liu Bin 
Published: April 2021

Abstract
In this paper, hardness testing, metallographic analysis, scanning electron microscope, X-ray diffraction and other methods are used to study the solid solution behavior of Al-5.0Cu-0.5Mn alloy in the range of 0-24h at 500°C-550°C. After different solid solution processes, the micro-structure and mechanical properties of the change law, the following conclusions are obtained: the as-cast alloy mainly consists of aluminum matrix and non-equilibrium eutectic composition, and the non-equilibrium eutectic is distributed in the grain boundary of the alloy in a discontinuous network. So, we get the following conclusions: The non-equilibrium eutectic in the alloy is rich in Cu elements, and its main chemical composition is Al2Cu. The formation of this structure is due to the rapid cooling of the ingot during the solidification process and insufficient atom diffusion.
Study of the Mechanism of Oxalis corniculata (L.) in the Treatment of Hepatitis based on Network Pharmacology
Authors: Ding Qin , Huang Xulong , Yang Xiaosong , Zhang Mei , Qin Ping , Wu Hongmei , Wang Xiangpei 
Published: April 2021

Abstract
Objective: The molecular mechanism of Oxalis corniculata (L.) in the treatment of hepatitis was studied by network pharmacology. Methods: The active ingredients of that were screened using network pharmacology. The “drug-active ingredient-target-disease” network was constructed. The signal pathway and biological process of the target was analysed by DAVID database. Results: Screen out 8 active compounds and 30 potential targets, the target proteins are TP53, AKT1, ALB, and IL6, respectively. 42 biological processes and 39 signaling pathways were screened. It exerts anti-hepatic effects by regulating signaling pathways (such as cancer pathways, hepatitis B and PI3K-Akt signaling pathways). Conclusion: Network pharmacology provides new ideas and methods for revealing the anti-hepatic mechanism of Oxalis corniculata (L), and provides scientific basis for further research and development of Oxalis corniculata (L).
Synthesis of cathode material with different dosage of maleic acid-leachate of spent lithium-ion batteries
Authors: Sun Liuye , Liu Borui , Wu Tong , Wang Guange , Huang Qing 
Published: April 2021

Abstract
In this paper, LiNi1/3Co1/3Mn1/3O2 cathode materials were synthesized by sol-gel with different dosage of maleic acid-leachate of spent lithium ion batteries (LIBs). Electrochemical performance test was performed on the re-synthesised materials to explore the effect of leachate dosage. The results show that the degree of Li+/Ni2+ mixing increased while initial discharge capacities and capacity retention decreased significantly with leachate dosage increasing. Therefore, the leachate dosage is preferably 65% which can achieve a win-win situation in economy and performance when the LiNi1/3Co1/3Mn1/3O2 cathode materials were synthesized with maleic acid-leachate of spent LIBs in our work.
Research on The Deep Hole Processing of Aramid Fiber Reinforced Composites
Authors: Jin Lei 
Published: April 2021

Abstract
Aramid fiber reinforced composite is a new material with high strength and low density, which is widely used in weapon, automobile, aerospace and other fields. The material is difficult to process, drilling is the main processing method of the material. In the drilling process, it is easy to appear fluff, ablation, stratification and so on. As a result, it is difficult to guarantee the quality of traditional processing and seriously affects its performance. In this paper, the drilling force and temperature in the drilling process are studied, and the influence of temperature and force on the processing quality is analyzed, so as to provide reference for the low-damage processing of aramid fiber reinforced composites.
Research Progress of Improved Methods of Zero-valent Iron
Authors: Wang Luyao , Peng Biao , Qu Shaodong 
Published: April 2021

Abstract
It has been found that ZVI is cheap and readily available, environmentally friendly, highly active, thoroughly removed, and has a wide range of applications. It can remove a variety of environmental pollutants in wastewater, surface water, groundwater, and drinking water, such as organic compounds, heavy metals and metalloids, oxygen-containing anions. It has been found through research that the activity of ZVI can be improved in various ways. This paper summarizes the research progress of various methods such as ZVI pretreatment, ZVI and material coupling method, UV assisted method, weak magnetic field method, aeration method and particle size reduction, which in order to provide new ideas for the theoretical research and application of ZVI.
Research and analysis of maximum likelihood recursive identification algorithm based on physical exercise behavior of obese children
Authors: Zhao Huoping , Wang Dong , Li Dahu , Sun Kang , Zhang Wanjun , Gou Xiaoping , Zhang Feng 
Published: April 2021

Abstract
With the decrease of physical activity, children’s health problem will become an urgent problem in building a well-off society in an all-round way. There are differences in the safe heart rate of children with different physique when they exercise.This paper studies the suitable heart rate of children with different physique. Based on a maximum likelihood recursive algorithm for obese children’s physical exercise behavior, a model recognition system based on the maximum likelihood recursive algorithm for obese children’s physical exercise behavior is established. Finally, through MATLAB simulation analysis, the results show that fat the model recognition of MLR algorithm is consistent with the actual results, and the simulation results verify the feasibility and effectiveness of MLR algorithm.
The influence of stiffness coefficient of steel support on supporting effect and its optimization
Authors: Zhang Jie , Li Yue , Zhao Xinyue , Shi Shenyue , Liu Wenxia , Lin Xue , Chen Junsheng , Zhao Yinghao 
Published: April 2021

Abstract
The stiffness coefficient of steel support plays an important role in controlling the deformation of foundation pit, but the influence of various parameters in the stiffness coefficient on the supporting effect of foundation pit is still unclear, resulting in the unreasonable value of the stiffness coefficient. By means of theoretical analysis and numerical simulation, this paper makes a comprehensive and in-depth study on the influence law and optimization of the stiffness coefficient of steel support on the supporting effect. Based on the calculation of the stiffness of steel support, the calculation formula of the stiffness of steel support under the uniform radial load is derived by using the basic definition of stiffness calculation; the change rules of horizontal displacement and surface subsidence of the support structure under different parameters were analyzed by numerical simulation method, and the original scheme was optimized. The results show that: (1) in the stiffness coefficient, the steel support spacing and wall thickness have a great influence on the supporting effect; (2) with the increase of the rigid support spacing and the decrease of the steel support wall thickness, the horizontal displacement value and surface settlement value of the support structure both become larger. However, when the steel support spacing is 3.00-3.10m and the steel support wall thickness is 14mm-16mm, the horizontal displacement value and surface settlement value of the support structure do not change much, and they are all within the monitoring and warning value; (3) the original design scheme was optimized from 3.00m steel support spacing and 16mm steel support wall thickness to 3.10m steel support spacing and 14mm steel support wall thickness in the original scheme, which reduced the engineering cost and improved the construction efficiency.
Analysis on Sealing Mechanism of Casing Connection
Authors: Hao Long 
Published: April 2021

Abstract
This article describes the sealing mechanism of API casing thread connection and premium casing thread connection, and determines that the main macro factors affecting the sealing performance of premium thread connection are surface quality, contact pressure and contact width of sealing surface. The influence law of these three factors on sealing performance is discussed. The analysis results in this paper can provide the theoretical ground for improving the sealing performance of premium thread connection.
Plasma Preparation and Modification of Multi-Component High Polymer Molecular Nanocomposites
Authors: Wang Wei 
Published: April 2021

Abstract
Low-temperature plasma belongs to non-thermal equilibrium plasma, which has higher electron temperature and lower gas temperature, so it is a new method for preparation and modification of nano-catalysts. Low temperature plasma has attracted wide attention in the preparation and modification of nano-catalytic materials because of its high efficiency, environmental friendliness and easy functionalization of materials. It shows outstanding advantages in the unconventional preparation, doping, defect and vacancy manufacture of nano-catalytic materials, so it is widely used in the preparation and modification of all kinds of catalysts. This paper mainly reviews the research progress of low temperature plasma in the preparation and modification of oxygen reduction, oxygen evolution, hydrogen evolution and fuel oxidation catalysts, and expounds the reasons for the performance improvement of these catalysts from different angles. The challenges of low temperature plasma in the preparation and modification of nanocatalysts are summarized, such as relatively high cost, reactor amplification, material controllable preparation and so on. Finally, the development trend of plasma preparation and modification of nanocatalysts is predicted.
Rigid flexible coupling dynamic analysis of piezoelectric jetting dispenser based on ADAMS
Authors: Li Guang , Zhou Can 
Published: April 2021

Abstract
As dispensing technology needs accurate flow control, high performance spray dispensing has become the mainstream of dispensing technology. In this paper, the rigid flexible coupling dynamic simulation of piezoelectric jetting dispenser is carried out by using the dynamic simulation software ADAMS. In this process, the displacement and velocity of the needle under certain conditions are obtained. Then, according to the simulation results, the jetting dispenser driven by piezoelectric stack and the experimental test system are established. The dispensing process of the piezoelectric jetting dispenser is studied. The displacement of the needle in the dispensing process of the piezoelectric jetting dispenser is obtained by laser sensor, and the needle speed is obtained by analyzing the displacement of the needle. The experimental results are in good agreement with the simulation results, which proves the accuracy and feasibility of the simulation, and provides a method for the design and research of piezoelectric jetting dispenser.
Preparation and Optical Properties of CaAlBO4:Eu3+Phosphor
Authors: Wen Yan , Li Zhisen , Chen Dai , Man Shiqing 
Published: April 2021

Abstract
A series of single-phase CaAlBO4: Eu3+ powder samples were synthesized by high-temperature solid-phase method, the main factors are temperature, time, concentration of rare-earth ion, etc. The results show that the maximum emission peak of the sample is located in the wide band spectrum of 467 nm, and belongs to the 4f65d to 4f7 transition of Eu3+. The maximum absorption peak is located at a narrow band of 678 nm. by a study of the relationship between the doping amount of Eu3+ and the luminescence property of the sample, The optimum doping content of Eu x 3+(x = 0.0025)
The Risk Identification, Analysis and Assessment of China’s Power System Under the Electricity Reform Environment
Authors: Li Jing , Zhang Xiaoxuan , Zhang Fan , Fan Menhua 
Published: April 2021

Abstract
The new round of electricity reform in China will fundamentally change the current pattern of the power industry in terms of production, management and operation. During the process of power system reform, the security of the power system will face more risk challenges than ever before. This paper will first identify new risks of the power system in China under the new situation of electricity reform, and then analyses and evaluate these new risks. The major new risks are also specifically emphasized.
Analysis on The Influence Factors of Transmission Line Project Cost Based on Random Forest Model
Authors: Ma Li , Zhou Ming , Lu Shengwei , Wang Qixin , Liao Shuang , Ming Yue , Wang Sicong 
Published: April 2021

Abstract
There are many factors influencing the cost of transmission line project. The complex construction environment, different construction level and other factors could lead to large differences in the cost of comparable transmission line projects under the same voltage level. Based on the division of the transmission line projects, this paper analyzes and identifies the main factors affecting the cost of transmission line project. The random forest model is used to select 15 of the influencing factors. And then, this paper verifies the main factors selected, providing references for prediction.
Constructing a Data Middle Platform for Promoting Renewable Energy Accommodation Capacity
Authors: Jiang Xin , Cai Yuxiang , Shen Liang , Chen Xiangzhou , Lan Liang , Yang Qifan 
Published: April 2021

Abstract
Constructing a data middle platform for renewable energy accommodation can provide essential support for the safe and efficient accommodation and the orderly development of the renewable energy industry. Based on the connotation and technical characteristics, the data middle platform is constructed for renewable energy accommodation from four dimensions: data source layer, data asset layer, analysis layer and application layer. Furthermore, the paper analyses the application scenarios and corresponding key technologies of the data middle platform, which plays a vital role in the critical reference for promoting the accommodation of renewable energy.
Research on the Application of NLP Artificial Intelligence Tools in University Natural Language Processing
Authors: Yuan Aihong , Gao li 
Published: April 2021

Abstract
Natural language formal analysis theory has created brilliant achievements on the basis of previous studies. However, with the development of computing power and the advent of the deep learning boom, some people believe that the rule-based rationalist method is outdated, and deep learning that relies on massive data can truly realize artificial intelligence. When traditional natural language is directly transplanted to text language, the short content of natural language will cause data sparseness and result in deviation of calculation results. This paper proposes a new natural language similarity measurement method by using NLP artificial intelligence tools. This method first preprocesses short texts, then builds a complex network model for natural language, calculates the complex network feature values of natural language words, and then uses NLP artificial intelligence tools to calculate the semantic similarity between natural language words, and then combines natural language Semantic similarity is defined to calculate the similarity between natural languages.
Reactive Current Control Strategy of CHB-DSTATCOM Based on Unit Vector
Authors: Chen Jiahao , Yang Daliang , Xu Shengguang , Chen Shuang 
Published: April 2021

Abstract
For a single-phase distribution network static synchronous compensator (DSTATCOM) based on cascaded H-bridge (CHB) converter, the design of dq control-based system is difficult due to the coupling effect and current fiction. To address this issue, first, the mathematical model of dq control is derived, then the unit vector (UV) control based on αβ frame is proposed. In this paper, the compensation current reference is obtained through the instantaneous power theory and unit vector method. Proposed control structure eliminates the effects of the decoupling control and the complex current fiction. In addition, the DC-voltage balance is achieved. Finally, the effectiveness of the proposed control strategy is verified by the simulation and experiments.
Dynamic response research of projectile-based device with the load-reliving subassembly’s material properties nonlinearity
Authors: Sun Shanshan , Zhang Hang , Jiang Bin’an 
Published: April 2021

Abstract
According to the characteristics of the structure of the projectile-based device, designed Hopkinson bar experiment, established the nonlinear dynamic model of projectile-based device with load-reliving subassembly, solved by theory of stress wave, comparing to the result of Hopkinson bar experiment, they are the same, it is useful for engineering design and analysis of projectile-based device.
An Efficient Method for Characterizing the Operational Feasible Region of Virtual Power Plant
Authors: Jiang Hua , Jin Liming , Wu Yingxia , Zhao Ke , Long Jiarui 
Published: April 2021

Abstract
The penetration of distributed energy resources (DERs) in the power system is increasing considerably in the last years. Virtual power plant (VPP) which provides services for power market and system dispatching is an important method to aggregate DERs. In this paper, the virtual power plant is studied from the perspective of “region”. The operational feasible region (OFR) of the virtual power plant is defined as the set of all active and reactive power output by the virtual power plant, in which the network constraints and the operation constraints of DERs will not be violated. A new approximation method is proposed to characterize the operational feasible region of a VPP. Based on iterative linearization, a strategy is proposed to improve the accuracy of the region description. The effectiveness and efficiency of the proposed method is tested on the IEEE 30-bus system.
Optimal configuration of distributed power sources based on Fruit Fly optimization algorithm
Authors: Hu Linfeng , Lu Liang , Liu Tianyu 
Published: April 2021

Abstract
Based on the fuzzy membership technology to optimize the configuration of distributed generation access to the distribution network, a multi-objective optimization model is established that comprehensively considers the investment benefits of DG, polluting gas emissions and voltage quality. The chaotic sequence of Tent mapping is quoted in the fruit fly optimization algorithm (FOA) to improve it, increase the diversity of the population, and reduce the possibility of the algorithm falling into a local optimum. The simulation results of the PG&E33 node system verify the effectiveness and rationality of the model and the improved algorithm.
Construct Power Main Grid into a Railgrid
Authors: Li Guosheng , Zheng Xiuyu , Han Lei , Shu Xin 
Published: April 2021

Abstract
This paper briefly analyzes the problems existing in the current power system, and puts forward the fundamental measures to solve the problems: from five aspects, to reconstruct and rebuild Power Main Grid into a RAILGRID. Meanwhile, puts forward that the power system should go back to the most basic functions, and transform the most basic transmission mode of electricity and electric energy. The goal is fundamentally to solve the problems of security and stability of ultra-large capacity power grid and energy interconnection power grid.
Analysis of Hyperthermia of Children in Enclosed Vehicle
Authors: Lv Xuhao , He Wenchao , Liang Longkai 
Published: April 2021

Abstract
Aiming at the problem of high temperature hazard in children stranded in cars, based on the thermal environment parameters of the enclosed vehicle during outdoor thermal soaking in summer, the predicted heat strain (PHS) model was used, combined with children’s height, weight, clothing and other factors, to simulate the changes in physiological indicators such as core temperature, rectal temperature and water loss, and to scientifically determined the maximum allowable exposure time. It was predicted that the core temperature of human body exceeded 38°C at 72 minutes, and then the body began to heat exhaustion.
Structural Type Selection of Water-cooled Motor Controller Based on ICEPAK
Authors: Zhao Weijian , Sun Huizhi , Fang Weiping , Liu Benchao 
Published: April 2021

Abstract
Three kinds of water-cooled radiator structures of the motor controller are designed in the process of developing the motor controller of the electric vehicle. Based on ICEPAK, the detailed distribution of the temperature field is obtained by simulation analysis of thermal analysis. The temperature situation of the IGBT, the thermal resistance of the radiator and the pressure drop of the radiator are analysed. The results show that the cooling effect of the cross shaped needle shaped radiator is the best, so it is selected as the radiator of the water-cooled motor controller.
Analysis of Induced Voltage and Influencing Factors of Transmission Lines with Different Voltage Levels and Different Towers in Parallel on the Same Corridor
Authors: Bao Yanyan , Liu Kang , Zhang Guangdong , Wen Dingjun , Guo Lu , Wang Hailong 
Published: April 2021

Abstract
In view of the strong coupling between the parallel transmission lines of different voltage levels and different towers running in the common corridor, in order to study the electrical imbalance between the 750kV transmission line and the 330kV transmission line erected in the common corridor, the simulation analysis of the common corridor transmission and distribution Causes and influencing factors of induced voltage in electric lines. The system equivalent model is established by using ATP-EMTP. The results show that the 750kV transmission line has obvious electrostatic induction voltage to the 330kV transmission line parallel to the corridor, and the electromagnetic induction voltage between them is not obvious. The influence of 750kV transmission lines on 330kV distribution lines is related to the transmission power. The greater the line power, the more severe the three-phase voltage imbalance of 330kV distribution lines, and vice versa.
Effects of ICT Application (Information Communication and Technology) Towards the Transformation of Regional Bureaucracy
Authors: Razak Muhammad Rais Rahmat , Ahmad Jamaluddin , Mustanir Ahmad , Madani Muhlis , Idhan Andi 
Published: April 2021

Abstract
Digital-based government has become an interesting issue when the expectations of the 2019 presidential and vice presidential elections, both the 01 Jokowi-Ma’ruf and 02 Prabowo-Sandi pair have the same passion for carrying out digital-based government programs. The presence of digital government should not only be selling campaigns, but must be able to be present in the midst of society by encouraging the application of Information, communication and technology (hereinafter abbreviated as ICT) in various public services, especially during the Covid-19 pandemic. The rapid development of technology has changed the paradigm of public service and governance, from being hierarchical to open and flexible, so that it has an impact on organizational culture and the acceleration of bureaucratic transformation in government. This study aims to find out how ICT plays a role in building organizational culture, making organizational structures, formulating regional policy visions and their influence on bureaucratic transformation, and also aims to look at the factors that influence indicators and bureaucratic transformation. The results showed that the application of ICT in the government of Sidenreng Rappang Regency had a real and significant effect on organizational culture and organizational structure only while vision and policies had not yet been influential but together had an impact on the acceleration of the bureaucratic transformation process. The dominant factor that affects is project-shaped activities, where structural officials have high responsiveness so that they can have a positive influence on bureaucratic transformation.