bluuebunny/crossref_metadata_2025_split huggingface dataset:
Generation and Optimization of interpolation approximation algorithm based on Laser Icon Contour Generation
Authors: Zhou Beifen , Bai Yalong , Feng Xinyuan 
Published: April 2021

Abstract
Point-by-point comparison interpolation is a widely used algorithm in laser marking system. This algorithm plays a very important role in controlling the laser trajectory and fitting the image trajectory. Because the point-by-point comparison interpolation method has the characteristics of intuitive operation, uniform pulse output and convenient adjustment, it is a kind of interpolation algorithm which is more suitable for the application of marking machine system. In order to improve the marking efficiency of vector text in laser marking system, by analyzing the outline structure of TrueType font and the properties of Bezier curve, an optimization algorithm for straight line approximation of TrueType font outline is presented, and the theoretical analysis and experimental verification are carried out. Firstly, the Bezier curve in the TrueType font outline is segmented according to the deCasteljau recursive algorithm, and then the curve is replaced by the connection of the head and tail control points. Finally, the approximate line segment is interpolated to generate marking data, and the straight line approximation outline is compared with the standard TrueType font outline. The results show that under the condition of satisfying the accuracy, the algorithm has the advantages of simple calculation process and a small number of nodes, and improves the marking efficiency of vector text. The traditional point-by-point comparison interpolation algorithm has some problems such as low precision and slow speed. In order to improve the performance of the algorithm, the traditional point-by-point comparison interpolation algorithm is improved, and the calculation and simulation are carried out. The results show that the accuracy and speed of the improved interpolation algorithm are obviously improved. The patch is extracted from the point cloud data, and the feature patch is generated by patch growth and fusion, and the feature line is constructed quickly according to the proposed patch two-way index method, and finally the point cloud plane contour is generated. Experiments show that this algorithm can generate point cloud contours quickly, accurately and effectively.
Research on Economic Returns of Distributed Photovoltaic Power Generation Projects in Hunan
Authors: Zhu Yingtong , Jie Xiaowen 
Published: April 2021

Abstract
Photovoltaic power generation has been practiced in the application field in recent years. Distributed photovoltaic power generation has now entered the stage of large-scale, and government subsidies at all levels are being reduced. Will distributed photovoltaic power generation projects still have the necessary investment and development advantages in the future? We selects Hunan Province, China as the research area and analyzes the economic returns and development of distributed photovoltaic projects. The method of esmiting economic returns is the IRR, NPV and payback period. According to the analysis conclusion, it is believed that distributed photovoltaic power generation still has advantages, and the investment strategy and suggestions for distributed photovoltaic power generation projects in Hunan.
Research on Vehicle Damping Control Strategy Based on In-Arm Torsional Electromagnetic Active Suspension
Authors: Zhang Hongyang , Xiang Weier , Zhou Kailai , Xu Lin 
Published: April 2021

Abstract
This paper proposes a new control strategy based on the In-Arm Torsional Electromagnetic Active Suspension (ITEAS), which can improve the vehicle ride comfort through adjusting the damper in ITEAS to optimize the kinetic characteristics of the vehicle composed by two ITEAS systems. Firstly, the structure and principle of the new type system is introduced followed by the description of the vehicle and the damper in ITEAS. Secondly, according to theoretical mechanics and fluid mechanics, the dynamic model of ITEAS system and the hydraulic model of shock absorber are established under forced vibration. Then, the PID control simulation model of the front suspension is established in AMESIM with a passive model as reference, due to the special assemble features of the vehicle. The rear suspension adopts predictive control method and the simulation model is built in MATLAB/SIMULINK, whose theory can be summarized as adjusting the duty ratio of the valve in damper to improve the stability of the vehicle under the condition that the road surface information is already known. Lastly, this paper tests the suspension characteristics on the MTS bench, which verifies the proposed control method improves the ride comfort performance and the feasibility of predictive system.
Experimental Research on Partial Discharge of High Voltage Direct Current
Authors: Zhang Jian , Xu Minhu , Guo Yun , Zhang Kexin , Liu Heqian , Zhao Xiangyu 
Published: April 2021

Abstract
Under the action of long-term high-voltage DC voltage, the insulation of electrical equipment is inevitably aging, and it is necessary to monitor its insulation status. Since insulation defects of different nature damage electrical equipment to different degrees, the identification of defects is very important. To this end, a DC partial discharge detection system based on AC partial discharge detection equipment was built, focusing on key issues such as the choice of test power supply, the choice of test frequency, and the choice of pressurization methods. The successful completion of the on-site partial discharge test of UHV converter transformers has provided valuable practical experience for the future on-site partial discharge tests of UHV converter transformers, and provided important tests for the establishment of on-site partial discharge test standards for UHV converter transformers. in accordance with.
Research on Laser Ablation Technology in the Material Interaction of Two-dimensional Axisymmetric Ablation Model
Authors: Wang Yaode , Li Changli 
Published: April 2021

Abstract
In order to explore the mechanism of interaction between nanosecond pulsed intense laser and material, the paper established a two-dimensional numerical model, using finite difference method to numerically simulate the temperature field of nanosecond laser pulse ablation of metal aluminium. By comparing different pulse widths, the temperature field caused by the laser under the spot and energy evolves with time. It is found that the temperature in the early stage of the pulse rises faster than in the later stage. The isotherm diagram shows that the centre temperature rises fastest, the ablation profile is similar to the shape of the laser beam, and the ablation depth reaches 1 -5μm. The longer the pulse width, the narrower and deeper the ablation, the larger the spot, the wider and the shallower the ablation. The calculation results show that, compared to the uniform distribution, when the laser has a Gaussian distribution, the target aluminium centre can be obtained the higher the temperature rise, the more prone to ablation and the shorter the melting time of aluminium. The model established in this paper can be easily extended to three-dimensional situations.
Multi-agent time-varying formation control based on consistency
Authors: Wang Xinyi 
Published: April 2021

Abstract
This paper studies the dynamic time-varying formation control of multi-agent systems. Aiming at the unmanned vehicle systems, based on the static time-varying formation in literature [18], a multi-agent dynamic time-varying formation control based on consistency is put forward. Additionally, the sufficient conditions for the agreement and the steps for solving the control parameters are given. The simulation is conducted to prove the effectiveness and robustness of the theoretical results.
Multi-Antenna Selection for Double Spatial Modulation
Authors: Fu Dan 
Published: April 2021

Abstract
In this paper, to exploit the spatial domain of transmit antennas (TAs) for the transmit diversity gain in the double spatial modulation (DSM) system, a new scheme of multi-antenna selection for DSM (MAS-DSM) is designed. In the MAS-DSM system, the number of TAs are grouped into n groups, each of which corresponds to an sub-system of DSM. More specifically, a transmitted spatial vector is constructed by two spatial vectors (SVs). For the achievability of transmit diversity gain, one of the two SVs is obtained by using n antenna index (AI) vectors to modulate a data symbol, another of them is obtained by multiplying with a rotation angle after another n AI vectors to modulate another data symbol. Finally, the spectral efficiency and the average bit error ratio (BER) are analyzed. Simulation results by using Monte Carlo demonstrate that the proposed MAS-DSM system has better BER performance compared with the conventional spatial modulation schemes in wireless communication network.
Research on defect pattern recognition of Light Guide Plate based on Deep Learning semantic Segmentation
Authors: Liu Linlin , Zuo Haiyu , Qiu Xiao 
Published: April 2021

Abstract
Because the defects of the light guide plate are still extremely small under the image taken by the high-resolution industrial camera, and the characteristics of different defects are different, as well as the texture characteristics of the whole light guide plate, such as dense and uneven distribution of light guide points, the traditional image processing and detection methods require experienced visual engineers to do a lot of feature extraction algorithm programming and expensive code maintenance. The accuracy is low and the stability is poor. However, the surface defects of the light guide plate are still mainly detected by artificial visual observation, and only a few manufacturers use traditional image processing methods to detect them. For this reason, a defect detection method based on deep learning semantic segmentation is proposed. In this method, the defect features of the light guide plate are extracted by self-learning by training the neural network, so as to avoid the complicated programming work of feature extraction algorithm. First of all, the defects of the collected light guide plate are marked to make a sample set; secondly, the pre-trained pyramid scene parsing network (PSPNet) is used to retrain the labeled samples; furthermore, the defect detection of the light guide plate is realized by using the trained model. The single deep learning semantic segmentation defect detection method usually can not meet the needs of industrial applications, finally, it is necessary to combine the simple machine vision method to judge and screen all the suspected defect regions detected by the deep learning semantic segmentation method. The experimental results show that the detection rate of bright spots, dark spots and scratches is as high as 96%, which can basically meet the requirements of industrial inspection.
Preliminary Study on Electromagnetic Thermal Coupling Numerical Simulation Technology of Static Inductor
Authors: Sun Qian , Yuan Hongli , Zhou Hong 
Published: April 2021

Abstract
In this paper, the load transfer analysis method is used. Firstly, the magnetic thermal coupling analysis model is established and the material parameters are determined in ANSYS software. Secondly, the direction of applied current is determined by studying the influence of current direction on the temperature field in the electrified wire. Then, the relationship between current frequency, current magnitude and temperature field and the change of temperature at typical points with time are studied respectively. Finally, the parameters of temperature field for high frequency induction heater to produce better plastic deformation are determined. The research content of this paper can provide a reference for the subsequent research of electromagnetic thermal structure coupling numerical simulation technology of mobile inductor.
Reflected Backward Doubly Stochastic Differential Equations with Monotone Coefficients
Authors: Li Yunhong , Wei Lifeng 
Published: April 2021

Abstract
In this paper, we prove the existence and uniqueness of the solutions to reflected backward doubly stochastic differential equations (RBDSDEs for short) with monotone coefficients. The “reflected” keeps the solution above a given stochastic process. We get the uniqueness and existence by penalization.
Research progress of TiO2-based photocatalytic materials
Authors: Zhu Li 
Published: April 2021

Abstract
TiO2 is the most widely studied photocatalyst, which has a good application prospect in the field of environmental pollution control and has always been a hot spot of photocatalytic materials research. The crystalline structure, surface morphology, and optical properties of TiO2-based photocatalytic materials prepared by different methods are different, and thus exhibit different photocatalytic properties. In this paper, the research progress of TiO2-based photocatalytic materials in China and abroad in recent years was reviewed based on the common preparation methods.
Attack and Defense Countermeasures of cognitive radio
Authors: Li JinFeng , Sun Bingcheng , Cui Hongfeng 
Published: April 2021

Abstract
with the development of cognitive radio theory and technology, its application in various fields will be more and more extensive. She’s trying to bring AI technology to the Internet. In this paper, the attack and defense of cognitive radio will become more and more intense. The mobile communication process of cognitive radio is summarized, and the attack and Defense Countermeasures of cognitive radio are analyzed.
Design of a new buoy night display system
Authors: Chen Wenhao , Li Xiaolong 
Published: April 2021

Abstract
This article through the analysis of the current navigation safety, combining the AIDS to navigation problems, in the light of the short of the AIDS to navigation, using the right technology, the display system to carry on the design of a new type of buoy night, through the design of various modules, the organic combination of display system, form a new type of buoy night finally to the feasibility analysis of system, ensure the accuracy of the model and feasibility. Among them, the model control box module, light emitting component module, the solar panel module, photoelectric sensor module, power module system design circuit design together, make the buoy nighttime display system has a good stability, high consistency, high cost performance, light range, fast response, electromagnetic compatibility and reliability, the product in ensuring the stability of the whole system work at the same time, maximum limit reduce the power consumption of the power supply. It improves the ability of buoys to be identified by ship pilots at night and strengthens the guidance of channel ships, ensures navigation safety and reduces the property loss of ships and navigation marks, which is of extremely high social value and practical significance for the improvement of navigation marks.
The Research on Blended Teaching in Vocational Colleges Based on Smart Campus
Authors: Huang Zhiyan 
Published: April 2021

Abstract
Blended teaching is an “online” + “offline” teaching that combines the advantages of online teaching and traditional teaching. Through the organic combination of the two forms of teaching organization, learners’ learning can be guided from shallow level to deep level to deepen the understanding of learning. Teachers no longer occupy students’ learning time in the classroom, and they can promote the development of their individualized learning, and let students acquire more learning knowledge or allow students to learn independently in their spare time. This article is to mainly analyze the application of blended teaching in vocational Colleges under the background of smart campus.
Microstructure and properties of laser hybrid welding joint of AH36 marine steel
Authors: Pei Yingchao , Xia Dianxiu , Wang Qichen , Shang Chengjia , Sun Weihua , Wang Shouren , Han Qin , Wang Dongyue , Han Zhengpeng 
Published: April 2021

Abstract
AH36 Marine steel 10mm thick was welded by Laser-MIG hybrid welding process, and the structure and properties of the arc zone and laser zone of the Laser-MIG hybrid welding joint were studied respectively. The results show that the width of welding seam and HAZ in arc action zone is obviously larger than that in laser action zone. The microstructure of the weld was mainly acicular ferrite, bainite, martensite and grain boundary ferrite, and the content of martensite and bainite in the laser action area was relatively higher. The microstructure of the coarse grain zone is mainly thick lath martensite, granular bainite and acicular ferrite, and the microstructure of the arc action zone is relatively larger. The microstructure of the fine crystal region is mainly fine ferrite and pearlite. The hardness of arc zone and laser zone is distributed symmetrically in the weld center, the lowest hardness occurs in the weld center, and the high hardness occurs in the weld HAZ. The tensile specimens in the arc zone were fractured near the HAZ and the laser zone was fractured on the base metal far away from the weld. The lowest value of impact absorption work at 0°C in arc action area and laser action area appeared at the fusion line +0.5; the highest value of impact absorption work at 0°C in arc action area appeared at the fusion line +1.0, the fusion line +1.5, and the fusion line +2.0; the highest value of impact absorption work at 0°C in laser action area appeared at the fusion line. The impact absorption at 0°C in the laser action area is higher than that in the arc action area.
Application of Acoustic Spectrum Analysis in Detection of Porcelain Post Insulators Based on a portable insulator detection equipment
Authors: Wang Anli 
Published: April 2021

Abstract
Fault detection of porcelain post insulators has always been the research direction of power industry. At present, the related equipment for flaw detection of porcelain insulators still has some defects, such as high equipment cost, complex operation and poor detection effect. For the fault detection of porcelain post insulators, this paper will put forward a complete set of fault detection methods based on the application of acoustic spectrum analysis in the fault detection of porcelain post insulators. The equipment used is a portable insulator testing equipment independently designed by the research team based on the basic principle. Based on this method, a large number of comparative experiments and testing applications have been carried out, which verifies the effectiveness and reliability of the vibroacoustic testing method in the detection of porcelain post insulators.
Research on Intensive Power Resource Regulation Algorithm
Authors: Qiu Fei 
Published: April 2021

Abstract
The paper takes the economic load distribution of the power system as the objective function, and establishes a mathematical model with economy, environmental protection, and reliability as system variables. It adopts the hierarchical thinking of control theory, uses multi-particle swarm multi-level optimization algorithm, and combines power distribution the characteristics of the network take the optimal value of each subsystem as the individual optimal value of the current particle, and perform the second particle swarm optimization to increase the probability of effective solution generation in the iterative process. Using multi-particle swarm hierarchical distributed algorithm, effectively improve the optimization accuracy of the objective function, the convergence speed and the number of times of convergence to the global solution. This paper focuses on power system optimal dispatch, fully considers the relationship between each system, and uses particle swarm optimization algorithm to obtain the optimal allocation of power resources. At the end of this paper, two typical IEEE power distribution networks are simulated and calculated. The calculation results show the superiority of the algorithm in calculation accuracy and convergence speed.
Summary of PID Control System of Liquid Level of a Single-Capacity Tank
Authors: Jiang Pei 
Published: April 2021

Abstract
Liquid level is one of the control parameters widely used in industrial production. Accurate control of liquid level bears on the quality, efficiency and market of products, as well as the effect and safety of production. Therefore, the research on liquid level control has practical significance and broad application prospects. In view of this, this article firstly briefly analyzes the characteristics of the single-tank water tank level system, and then focuses on the realization of classical, fuzzy and neural network PID (Proportion Integral Differential) algorithm for the single-tank water tank level system. Finally, the validity of algorithm is proved by the system real-time simulation curve, which provides a more comprehensive reference for similar control systems.
Cleaning Device for Inner Wall of Vertical Cement Tank Based on Electromagnetic Principle
Authors: Yang Shenyang , Lv Shaowei , Yu Longkun 
Published: April 2021

Abstract
In the process of cement storage in cement tanks, the cement on the inner wall is affected by various factors, which will cause hardening. Cement hardening will cause a series of problems such as the decrease of effective storage capacity of cement wall. Therefore, in the mortar production process, the cement tank needs to be cleaned regularly. In order to solve the above problems, the device is designed. The device adopts intelligent design and cleans the inner wall of cement silo by spiral cruise cleaning method to realize the effective cleaning of cement silo.
Research on Intelligent Charging Control System of Electric Bicycle
Authors: Nie Gaosheng , Liu Yonghua 
Published: April 2021

Abstract
This article designs a basic electric bicycle charging management system, which can solve the problem of difficult charging of electric bicycles and completely eliminate the safety hazards of private wire connection. The electric bicycle charging management system is divided into charging station intelligent terminal, server background, WeChat client, web management terminal, etc. The intelligent terminal of the charging station adopts the RS-485 bus to realize the communication with the intelligent charger and grasp the charging status in real time. The back-end server adopts the MVC architecture, which provides a query interface for the client and the web management back-end to monitor the charging status in real time. The management system also implements the WeChat payment function, which can realize charging on time and according to the amount. Practice has proved that the charging management system can well solve the current charging disorder and has a good market prospect.
Study on breaking mechanism of chestnut shell based on finite element analysis
Authors: Yang Xueyin , Qi Yanxing 
Published: April 2021

Abstract
Chestnut shell breaking is an important part of chestnut processing. According to the measured physical parameters and geometric dimensions, the solid model of chestnut was established by ANSYS software, and the chestnut was divided into appropriate element grids. The stress and strain of chestnut shell breaking were analyzed along different loading directions. The results show that the y-direction loading is the most labor-saving, and the x-direction loading is the best, so as to improve the quality of chestnut shell breaking It provides a theoretical basis for the further processing of chestnut.