bluuebunny/crossref_metadata_2025 huggingface dataset:
Diagnostic Analysis and Research on Battery Health Status of Electric Vehicles
Authors: Hu Yinquan , zhang Haoran
Published: March 2021

With the rapid development of electric vehicles, the attenuation problem of high-specific energy lithium-ion batteries has been paid more and more attention. Its health state is the core parameter of durability management, which is crucial to prolong battery life and improve system reliability. Aiming at the safety and power performance of power battery in the operation of electric vehicles, the kalman filter method was combined with battery charge-discharge curve identification, and the battery health (SOH) diagnosis method based on online testing platform was proposed. The results show that the battery health state can be estimated by the change of internal resistance of the battery model, and the absolute error is not more than 3%, and with the improvement of the model accuracy, the estimation of the battery health state becomes more accurate.
Research on Anti-ship Collision Measures for Offshore Wind Farm in Operation Period-Case Study of Zone 2 Project of Guodian Zhoushan Putuo No.6 Offshore Wind Farm
Authors: Sen Zhaopeng , Song Li
Published: March 2021

Since 2007, China’s offshore wind farm construction has developed rapidly, with more than 50 projects under construction and under construction. The operation period of offshore wind farms has a far-reaching impact on the ship traffic pattern in coastal traffic-intensive waters, and the poor compatibility of sea resources has a fragmented and three-dimensional exclusive impact on the use of sea areas, which makes the navigation conditions in nearby waters more complex. At present, there is no universally binding international convention or technical standard for ship navigation safety in offshore wind farm waters at home and abroad, which leads to the lack of unification of several important aspects of standards for offshore wind farm design and construction.For example, the requirements for channel distance, anti-collision requirements, setting standards for navigation marks and warning signs, pollution prevention management, emergency disposal and subsequent abandonment are not uniform. This paper focuses on the analysis of anti-collision measures between ship and wind turbine foundation from the perspective of navigation safety during the operation of offshore wind farm, and takes the No.6 offshore wind farm project in Zhoushan Putuo as an example to discuss.
Research on intelligent mattress based on improved SMS structure sensing fiber
Authors: Ke Chenxi , Cai Yilun , Zhao Tao , Li Zhengying
Published: March 2021

The contact-type vital signs detection system affects the user’s comfort and causes inconvenience due to its monitoring through skin contact. And most of the non-contact equipment precision is not high, or the cost is too high. To solve the above problems, this article is based on the physiological activity of slight vibration in multimode optical fiber micro bending deformation which results in the change of light intensity principle, considering the singlemode-multimode- singlemode(SMS) fiber of the structure of the sensor has simple structure, low cost, high sensitivity, but get the signal to noise is bigger, the accuracy is not high, this paper designs a kind of intelligent mattress based on modified SMS sensing optical fiber. The mattress can obtain ballistocardiogram signal in real time by changing the small light intensity, and obtain the heart rate, respiration rate and other information through the algorithm processing signal. In this design, the sensing fiber of the mattress is embedded in a small core fiber to solve the shortcomings of signal noise interference and instability obtained by the SMS structure fiber, and then it is embedded in the mattress by means of serpentine routing, and uses the covering material of the mattress adjusts the micro-bending period of the optical fiber to reach the critical mechanical period, so that the mattress has high sensitivity. Through in the laboratory and SMS type sensor for heart and breath signal are compared, and contrast and by Fast Fourier Transform (FFT) in frequency domain signal is analyzed, the vital signs of signal more clearly this mattress stable noise smaller, replace the tester for many times after tests, get the signal of high accuracy, the error is very small. The experiment shows that the mattress can detect non-sensory vital signs, facilitate the user to monitor his/her physical condition in real time in daily work and life, and timely inform the family members and medical staff in case of emergency, so as to avoid the occurrence of accidents.
Predication of Solubility of Titanium in Fe-Csat-Ti Melts by MIVM
Authors: Yao Chunling , Zhang Songyuan , Liu Zhennan , Huang Hui , Liu Cong
Published: March 2021

The solubilities of Ti balanced with titanium carbide and titanium carbonitride in Fe-Csat-Ti melts were predicted by molecular interaction volume model (MIVM). In order to verify the present method, the activity of Si, Mn and Ti in Fe-C-Si, Fe-C-Mn and Fe-C-Ti melts were predicted by MIVM and compared with experimental data. The results indicate that the predicted values of Si, Mn and Ti activity by MIVM are in good agreement with the experimental data, and the predictive effect of this model is better than the Wagner formalism. Considering the fact that titanium carbonitride is a non-ideal solid solution, the solubilities of Ti were predicted. The results are in reasonable agreement with the experimental data, and the prediction effect of MIVM are of better stability and reliability. Therefore, its prediction results can be used as the reliable basis of thermodynamic study for liquid iron containing Ti, and the calculations can be performed to predict at which conditions the carbides or carbonitrides will form.
The Critical Designing Problems of SMA-10 Bridge Deck Pavement
Authors: Yin Feng , Jia Zengrong , Liu Jie , Yang Fei
Published: March 2021

This paper mainly discusses the volume characteristic change trend of SMA-10 as ultra thin friction course under different gradation design conditions. Marshall compaction results shows that air void is relevant to 2.36mm-4.75mm gravel content. Skeleton structure analysis indicates that 2.36-4.75mm gravel content below 15% is suitable. We can choose designing gradation with 2.36mm or 4.75mm as control point. 1.18mm aggregate interference effects apparently for 2.36mm sieve pore as break point (BP). Road performance of SMA-10 meets the demands when gradation is designed according to the research conclusions.
Exploration and Thinking on Collective Protection System of Floating Nuclear Power Plant
Authors: Liu Le , Luo Qingsong
Published: March 2021

Demand and development for nuclear emergency interventions and protective actions for floating nuclear power plants, Combining the collective protection systems and their functions of the monitoring system, the protection system, the washout system and the control system of the nuclear, chemical and biological weapons of large warships, To provide reasonable nuclear emergency facility support for the construction of floating nuclear power plant nuclear accident emergency plan. It provides a theoretical basis for the nuclear emergency plan of floating nuclear power plant at sea, as well as the collective protection system of floating nuclear power plant, to give full play to the functions of collective protection equipment.
Study on Anti-overturning self-locking device of CRDM for Offshore Nuclear Power Platform
Authors: Luo Qingsong , Xu Huaijin , Liu Le
Published: March 2021

The offshore floating nuclear power plant is an organic combination of offshore ship platform engineering and nuclear power engineering. Its operation is affected and restricted by marine environmental conditions. Under extreme sea conditions, serious nuclear safety accidents can be caused by the capsizing of ship platforms. The passive anti-overturning self-locking device proposed in this paper can lock the drive rod connected to the control rod when the platform overturns, preventing the control rod from exiting the core and ensure the safety of the reactor core. The test results show that the control rod self-locking of the control rod driving mechanism can be realized after the tilt of the ship platform exceeds 90 degrees. It is an important means to ensure nuclear safety and efficiency for offshore floating nuclear power plant under the overturning condition of the ship platform.
Strategic Analysis on innovation of enterprise statistical management under the new economic environment
Authors: Wang Linghong
Published: March 2021

With the continuous development of China’s social economy, China’s economy has entered the transition period. The change of economic situation makes our socialist market economy enter a new environment. In the new economic environment, enterprises should realize the importance of statistical management, and take statistical management as the development strategy of enterprises, so as to improve their core competitiveness. Based on this, this paper analyses the strategy of enterprise statistical management innovation under the new economic environment, aiming at promoting enterprises to constantly innovate statistical management mode, so that enterprises can better adapt to the new economic environment.
Research and dynamic analysis based on nonlinear identification of sports goods Econometrics
Authors: Yang Chunhua , Zhang Wanjun , Zhang Feng , Gou Xiaoping , Zhang Jingxuan , Zhang Jingyi , Zhang Jingyan
Published: March 2021

On the basis of literature research, this paper analyses the sports econometric analysis method, discusses the contribution of sports goods sales and economic growth in China, and analyses the dynamic relationship between them. In this paper, a nonlinear identification algorithm based on the econometric economics of sporting goods is proposed, and a nonlinear identification model based on the econometrics of sporting goods is established. Finally, through the MATLAB simulation analysis, the results show that: sports goods econometric nonlinear identification method is suitable for the coordinated development of regional economy, social environment and sports industry. The simulation results verify the feasibility and effectiveness of the nonlinear identification method of sports econometrics, and provide reference for the stable development of sports economy.
Effect of long term aging on Microstructure and precipitates of valve bolts in power plant
Authors: Wang Jiawei , Li Qingsong , Gong Xiufang , Yang Wensheng , Wang Tianjian , Gao Zhenhuan
Published: March 2021

10Cr11Co3W3NiMoVNbNB is used as the materials of Intermediate Pressure Control Valve, High Pressure Control Valve, and Main Stop Valve in some thermal power plant. After 45,000 hours of operation, the mechanical properties of this those materials has have been decreased greatly. By means of scanning electron microscopy, transmission electron microscopy and thermodynamic software simulation analysis, the conclusions can be drawn: under this operation environment, the coarsening of martensite lath and the dissolution-reprecipitation of second phases such as M23C6 carbides and MX phases are the main reasons which result in the decrease both in the room mechanical properties and high temperature mechanical properties of materials.
Feasibility Verification of Portable Intelligent Gauge Calibrator
Authors: Chen Hao , Zou Wenzhe
Published: March 2021

The current gauge calibrator has a series of problems, such as large volume, difficult to carry, low level of intelligence. As an improvement of the traditional gauge calibrator, a new portable intelligent gauge calibrator is designed. In this paper, based on the new type of gauge calibrator, it is compared with two traditional gauge calibrators to verify the feasibility of its application to the verification of grade 2 gauge.
Microstructure and wear resistance of Fe-based, Co-based and Ni-based coating of AISI H13
Authors: He Bing , Wang Jing , Yun Xiao , Chen Zhikai , Zong Xuemei
Published: March 2021

H13 coating, Stellite156 coating and WC/Ni62 composite coating were prepared on AISI H13 hot working die steel by laser cladding. By means of metallographic microscope, scanning electron microscope, microhardness tester and friction and wear tester, the microstructure, hardness and wear resistance of H13 and three cladding layers were compared and analysed. The results show that H13 alloy coating, Stellite156 alloy coating and WC/Ni62 composite coating all show good metallurgical bonding characteristics with H13 steel substrate. The H13 alloy coating is mainly composed of white reticular dendritic, black intercrystalline carbide, martensite and residual austenite; the Stellite156 alloy coating is mainly composed of primary γ-Co dendrites and eutectic tissues; the WC/Ni62 matrix composite coating is mainly composed of WC particles, dendrites and fine eutectic tissues. The average microhardness of the three cladding layers is obviously higher than that of the substrate. WC/Ni62 composite coating has the best wear resistance under dry wear conditions.
Blind Source Separation Method of Dual-Channel Single Vibration Signal Based on Power Spectral Density
Authors: Fan Ruxin , Wang Jiaqi , Su Jindi , Feng Yelei
Published: March 2021

In this paper,a convolution-mixing model of vibration signal is established according to the actual vibration signals collected by the sensor. This model is simulated and separated in P-waves and S-waves by using the frequency domain convolution blind source separation algorithm based on power spectral density matrix and diagonalization, and separated the vertical and horizontal waves of the actual two-channel underground vibration signals, which lays a technical foundation for the study of seismic characteristics and the inversion of source location.
The caculation of acoustic field of the cylinder and smooth surface in bistatic
Authors: Meng Zhaoran , Wang Xiaofeng , Lv Zhenwang
Published: March 2021

The scattered field in bistatic of cylinder and smooth surface are calculated according to Kirchhoff approximation, as well as the stabilization phase method is considered in the calculation. The result of scattered field of cylinder contains multiple cases where the transceiver is separated. While the result of smooth surface can be generalized to spherical targets and flat targets.
Thermal Radiation Superimposed Hazard Analysis of Elevated Flare under Accident Condition
Authors: Di Liu
Published: March 2021

In order to ascertain the hazard of thermal radiation during the overhead flare combustion under accident conditions in an enterprise, the CFD simulation is used to obtain the thermal radiation superposition nephogram under the water failure of the whole plant with two flare discharge and combustion at the same time. According to the regulation of maximum operating heat radiation value of flare system in Standard SH3009 -2013, the influence range of different thermal radiation intensities is calculated, which provides a basis for the height design of overhead flare system and the determination of reasonable safety distance between elevated torch system and surrounding facilities and personnel concentration places.
Development of Vehicle Domain Controller Based on Ethernet
Authors: Zhou Xuan , Wang Kai , Zhu Long , Huang Shuai , Han Guangsheng , Yu Jie
Published: March 2021

The ‘new four modernizations’ of automobiles with the trend of electrification, intelligence, network connection and sharing has brought new challenges to the electrical/electronic architecture of vehicles. The topology of the vehicle has changed from distributed ECU development to the centralized oriented domain controllers and central computers; the function of the whole vehicle has been changed from decentralized software development to the development of a unified software architecture for aggregation. This paper studies the Ethernet-based on-board domain controller and expounds the research method for the unified architecture platform. Based on the SOA model, it discusses the definition of services based on SOME/IP, the software architecture, the hardware topology, and communication layer parameters; and builds a domain controller hardware platform, and simulates the development content in the later stage to form a complete Development process of Ethernet-based on-board domain controller.
Trajectory Planning and Control of Handling Robot Manipulator
Authors: Zhang Xing , Kou Hao , Zhang Yi , Jan Kaina , Ivanovic Boris
Published: March 2021

In view of the lack of automation of the current material handling measures, based on a brief introduction to the structure of the handling robot, this article mainly studies the trajectory planning and control of the manipulator. First, the basic structure of the manipulator is simplified, the joint coordinate system of the robot arm is established by the Denavit-Hartenberg (D-H) method, and then the kinematics forward and inverse solution model is obtained by analysis. The fifth-order polynomial interpolation algorithm is used to plan the space trajectory of the rotating joint, and Matlab is applied to perform modeling and simulation to verify the rationality of the robot structure design and obtain the motion trajectory and each rotation of the mechanical claw end in the space rectangular coordinate system. Experiments on the motion curve, velocity curve and acceleration curve of the joint are implemented. Finally, the manipulator is controlled by the single-chip microcomputer, and the theoretical model data and trajectory are practiced. Practical results show that the control after trajectory planning reduces the loss of the manipulator and the overall accuracy and stability are higher.
Research on the Maintenance and Common Failures of the Marine Machinery and Equipment of the Scientific Investigation Ship
Authors: Gong Qiyong , Zhan Jun , Su Xiaoliang , Liu Chenglong , Zheng Jian , Wang Ning
Published: March 2021

The reliability, maintainability and effectiveness Ships, machinery and equipment, maintenance, failure of various mechanical equipment is essentially the reflection of the state of this type of repairable system at different stages in the same random process. Scientific investigation of ship machinery and equipment maintenance is an important part of ship maintenance, which has a greater impact on the entire ship’s running quality and service life. This article analyses the common problems in the maintenance of marine machinery and equipment through the explanation of the significance of the maintenance of marine machinery and equipment, and takes the gas turbine as the research object, and specifically analyses its failure repair measures. It is hoped that the safety and quality of ship operations can be further improved, while ensuring the safety of the lives of the ship’s passengers, it also provides assistance for follow-up research on relevant content.
Overview and Research on Mechanical Drive Empty Return and Its Influence Mechanism
Authors: Yu Kaiping , Si Dongya , Luo Tianfang , Pan Yuancheng
Published: March 2021

The length of transmission chain and the empty return of mechanical drive from motor to turret cause different height and orientation of tramission route for the receiver unit and the turret, thus affecting the aiming and firing accuracy of artillery auatomatic aiming system. In an effort to solve the problem, taking a certain type of artillery aiming system as the research object, the article systematically analyses the feature of empty return of mechanical drive and its influence mechanism, providing technical support for the improvement of the feedback accuracy and the aiming accuracy for the artillery aiming system.
Design of automatic measurement system for direct fire shell impact point
Authors: Yan Jun , Chen Xiangchun
Published: March 2021

Aiming at the problems of traditional manual detection of gun firing, such as hidden danger, poor accuracy and low efficiency, this paper proposes an automatic measurement system for the impact point of direct fire shell. Based on the acoustic positioning principle, collimation noise shielding technology based on slit, distributed sensing and coordinate conversion method, the impact is realized by integrating the time difference of shock wave arrival and the geometric relationship between sensors the accurate detection of points can improve the rapid detection ability of artillery performance test and firing training.
Analysis of the Response of Transmission Line Network under Electromagnetic Pulse
Authors: Wang Xutong , Guo Jinghai
Published: March 2021

Power system transmission line is a very complex network. The response of cable terminal is very different from that of single line. In order to accurately predict the terminal response of the cable under the nuclear electromagnetic pulse, a convenient method is needed to calculate the response of complex network. Based on the state equation method and the extrapolation method, the transmission line is equivalent to the current source or voltage source. Matlab program and Simulink are used to calculate the induced current generated by the cable terminal. The results are compared with those of CST cable studio. The results of CST show that the method is correct.
Effect of temperature on magnetic and dielectric properties of Mg-Cd-Ga ferrites for high-frequency-range antennas
Authors: Gan Gongwen , Zhang Dainan , Li Jie , Wang Gang , Yang Yan , Wang Xueying , Zhang Huaiwu
Published: March 2021

Mg ferrites with magnetic and dielectric properties are widely used composites to stabilize spinel structure. This study investigates the effect of sintering temperature (900°C, 915°C, 930°C, 945°C, 960°C) on the magnetic and dielectric properties and low-loss characteristics of Mg0.7Cd0.3Fe1.92Ga0.08O4 composites with 5 wt.% Bi2O3 addictive. The change in temperature enhances magnetization (saturation magnetization Ms from 24.37 emu/g to 33.12 emu/g), hence increasing permeability. The real permeability (μ’) of Mg-Cd-Ga ferrites was examined to be monotonically increasing from 15 H/m to 19 H/m. And the real part of permittivity (ε’) was fine-tuned by increasing temperature. As a result, at 920°C,μ’ and ε’ are closely equivalent ranging from 1 MHz to, this characteristics can be used for miniaturization and good radiation behaviors antennas. In addition, very low magnetic (tanδμ
~3*10−2) and dielectric (tanδε
~5*10−3) tangent enable excellent radiation efficiency at operation.
Analysis on the operation condition of Rubber belt CVT of baja Racing car
Authors: Ai Tianle , Xiao Siying , You Zhanpeng
Published: March 2021

baja racing is a kind of simple off-road racing originated in the United States, is the predecessor of Formula Student racing. This article through to the baja racing rubber belt type stepless transmission, for its mechanical characteristics, temperature characteristics and movement of the thermodynamic conditions of resonance are analyzed when the validation, thus more clearly the working characteristics of the rubber belt type stepless transmission to optimization design in after the game, make it can match various complex conditions of movement and maintain maximum speed ratio. This paper USES CATIA to establish the model, USES the MODAL module of ANSYS WORKBENCH to carry out the 12-order MODAL analysis, USES STATIC STRUCTURAL to carry out the force analysis, USES Steady State Thermal to carry out the analysis of the temperature change when the rubber belt stepless transmission works, and USES Matlab to carry out the simple automobile vibration simulation analysis. Finally, the conclusion is drawn and the design optimization analysis is carried out, so that the rubber belt CVT can achieve better dynamic performance and structural stability.
Design and Experiment of a Teaching Tool for Oval Gears with Variable Transmission Ratio
Authors: Huang Zhidong , Zhi Shan , Shi Chunyang
Published: March 2021

The basic theory of oval gear is studied. The teaching tool with variable transmission ratio of oval gear is designed. On the premise that the center distance remains unchanged, the parameter law of oval gear is clarified, and finally oval gear mechanism parameters of meeting the constraint conditions of box body are obtained. The effectiveness of the teaching tool design method is verified by experiments, which facilitates the standardized design and application of oval gear.
Study on dynamic flashover characteristics of iced insulators
Authors: Yang Xiaojuan , Li Jing , Liu Shuxin , Yu Longbin , Cui Juyong
Published: March 2021

In this paper, based on fxbw4-10/100 insulators, the flashover dynamic characteristics of iced insulators are studied. The insulators are artificially iced and flashover experiments are carried out with water of different conductivity in the laboratory, and different flashover voltages are obtained. The dynamic changes of insulator temperature field, electric field and potential are simulated by using finite element software. Finally, the influence of different physical parameters on insulator flashover characteristics is studied.
Residual Stress Analysis of Laser Welding Between Output Needle and Helix
Authors: Su Wei , Luo Wenhao , Dong Xianshan , Liu Renhuai
Published: March 2021

In order to obtain the welding stress of the output needle and helix, a finite element model is established and the mesh at the weld is refined to evaluate the welding residual stress. ANSYS parameter design language is used to simulate the motion load of welding heat source. Based on the exact calculation of the temperature field, the corresponding thermal units are converted into structural units to calculate the welding residual stress. Finally, the thermal stress distribution curve and residual stress distribution trend are obtained after post-treatment.
Research on Power Amplifier Based on Envelope Tracking Technology
Authors: Chao Guo , Fei Yang
Published: March 2021

With the development of mobile communication technology, the envelope bandwidth and power peak-to-average ratio of radio frequency signals are gradually increased. However, the power consumption requirements of electronic equipment are difficult to meet by traditional constant voltage power amplifiers. The mode of dynamic voltage supply is adopted by the envelope tracking power amplifier, which can make a good balance between the linearity and efficiency of the power amplifier system. The fundamental of envelope tracking power amplifier is shown in the article. Transistor model is selected to design the power amplifier, ADS and other tool software are used for simulation. The feasibility of envelope tracking technology is verified in improving the efficiency of power amplifier.
The Effect Evaluation of Labor Protection Equipment Allocation in Power Supply Enterprises: A Study of Central Provinces in China
Authors: Zhu Baoyu , Liu Sen , Li Hongyan , Gao Yang , Chen Tao , Sun Chengxun , Li Wei
Published: March 2021

The allocation and correct use of labor protection equipment is an effective means to reduce occupational hazards and emergencies in special industries. Constructing allocation effect index system of labor protection equipment in the power supply enterprises, this study comprehensively evaluates personnel Labor protection equipment allocation situation, and diagnosis allocation of the whole process of the lack of links. The evaluation results show that, taking a central province as an example, the overall score of labor protection equipment in power supply enterprises is 75.76, which can meet the basic needs of operators. At the same time, some deficiencies are found including that the effectiveness of labor protection equipment allocation system is somewhat deficient, the workers’ cognition for labor protection equipment and occupational health protection needs to be improved, and the aesthetics and comfort of labor protection equipment still have room for improvement. The research results provide an effective reference for the development of electric power industry and the status assessment of other industries.
Effect of tantalum doping on blistering behavior and retention in tungsten exposed to deuterium plasma
Authors: Zhou Hang , Jiao Qianqian , Liu Rui , Liu Chaozhang , Yan Shumin , Chen Xinhua , Feng Guodong , Zhang Huanyun , Li Li
Published: March 2021

Pure tungsten and tungsten tantalum (5 wt% ta) were prepared by powder metallurgy method, and then 40 eV deuterium plasma was injected into a linear plasma device with 1.08 × 1026 D/m2 energy. The irradiation properties of pure W and W-5%Ta were compared by a set of supplementary analysis techniques. The results show that adding proper amount of tantalum can effectively reduce the foaming caused by deuterium. In addition, TDS results show that the main desorption peak of pure tungsten is about 650 K, and the shoulder is at 730 K. For W-5%Ta alloy, the main desorption peak is about 810 K, and the deuterium retention in pure W is 4 times of that in W-5%Ta alloy. In addition, we also measured the hardness of pure W and W-5%Ta, which are 4.3 Gpa and 7.3 Gpa, respectively. The above phenomenon is due to the change of the microstructure and composition of the material.
Summary of calculation methods of engineering earthwork
Authors: Liu Qinglong , Duan Qiqing , Zhao Peng , Ren Hongwei , Duan Haoran , Liu Gengle , Wang Zhaochen , Duan Zichao , Qin Lei
Published: March 2021

Earthwork calculation occupies an important position in all aspects of engineering construction, and its calculation accuracy and efficiency will have a significant impact on engineering construction. This article analyzes and summarizes the calculation results of various methods and software used in calculating earthwork; points out the shortcomings of the existing earthwork calculation methods; discusses the future development direction of earthwork calculation, which requires not only high accuracy, but also Faster and smarter information feedback provides timely and effective reference and guidance for project construction.
Research on the awakening Algorithm of sleeping members in drugstore
Authors: Zheng HaoTian , Li Tao , Song Yan
Published: March 2021

The Awakening of sleeping members is the focus of smart marketing. The cost of losing a sleeping member in existing pharmacies is about 1/4 of the cost of adding a new member. This paper abstractly classifies the problem of whether the sleeping members are easy to be woken up in drugstore into a dichotic problem, and solves the problem that the existing sleeping members’ wake-up model is applied to the users of the sleeping members in drugstore and the prediction accuracy of the users’ consumption in the store is not high. According to sleep members have rich behavior characteristics, behavior, medical conditions, gender, age, payment, the membership card integral, active level characteristics such as properties, through the analysis of these sleep member attributes in order to distinguish between normal users and sleep, characteristics and the actual scene at the same time, using the method of feature selection to remove redundant features to form a new expression model. On the basis of multiple perspectives, multiple algorithm models were integrated to wake up the sleeping members. The actual store-to-store consumption data of the sleeping member users were used to verify and compare the effectiveness of the algorithm model, and the characteristic expression model with the best discrimination and accuracy was selected. Through the experimental study of the abstract dichotomy algorithm, it is found that the sleeping members with what characteristics are easy to be woken up. The experiment proves that the feature expression model has a high degree of differentiation for the sleeping users, and has a high accuracy in judging the users who are likely to be woken up among the sleeping members of the pharmacy.
Research on Optical Display Technology of Virtual Reality Technology Based on Optical Image
Authors: Lu Jing
Published: March 2021

In order to overcome the limitations of traditional optical display technology, a novel optical display technology based on optical image virtual reality technology is proposed. The optical display technology combines with virtual reality technology, relying on the Internet platform, fully and comprehensively simulates the visual display effect of human eyes. The results show that the optical display technology can break through the limitations of traditional optical display technology, improve the display effect, and build a high immersion virtual reality world for users.
Control of Electronic Mechanical Brake System on Automobile Electromechanical Brake
Authors: Chen Yiqing , Li Youtong
Published: March 2021

To verify the brake effect and the mechanism of exerting the brake of the electronic mechanical brake (EMB) system in the brake process of electronic vehicles, the working environment and function of each component of EMB are analysed based on the current relevant laws and regulations. Each component of EMB is calculated and selected. The mechanical relationship between the components of the EMB system are analysed, the preliminary EMB structure is designed, and the key parameters such as EMB brake pressure and EMB brake clearance elimination time are tested. Results show that the difference between the experimental value and theoretical value of the brake pressure test of the preliminary designed EMB structure aren’t large, and the brake clearance force increases with the increase of the locked-rotor voltage. When the voltage increases to 12V, the theoretical brake clearance force is 16510N and the experimental value is 15998N. During the EMB brake clearance elimination time test, the maximum speed of the brake block running at a constant speed during the elimination of brake clearance phase is 2.39mm/s, which is similar to the theoretical value Vmax=2mm/s. The experimental and theoretical motor brake speed is reduced to 88 rpm/min at 0.15s and at 0.13s. With all indicators considered, the EMB system can be used to control electromechanical brakes and provide certain guidance for its development.
Research on Computer Aided Design in Environmental Design in The New Period
Authors: Yong Jianhua
Published: March 2021

This article combines the new characteristics and changes brought by the widespread use of computer technology to the environmental design industry, and analyzes the basic characteristics of computer-aided design in view of some of the concerns of environmental design in the network age, and points out that the new era willfurther actively develop computer an effective way to assist design.
Improved Design and Numerical Calculation of Chaotic Circuit in Jerk System
Authors: Yao Jizhi , Deng Jianjie , Li Xu , Yan Xudong
Published: March 2021

Chaotic secure communication has always been a hot topic in nonlinear circuit research. In this paper, an improved jerk chaotic circuit is designed by using cell circuits and nonlinear function circuits. Simulation results show that the circuit can generate multi-scroll chaotic attractors. The position and number of chaotic attractors can be controlled by adding or deleting the number of nonlinear function circuit or by adjusting its parameters. Theoretical analysis and numerical calculation show that the circuit can describe jerk system, and the calculation results are consistent with the circuit simulation results. The circuit is not only simple in structure, easy to operate and high in experimental accuracy, but also easy to control chaos, which is widely used in secure communication.
Design and Development of “VR + Arduino” Immersion Interactive Experiment Case
Authors: Yong Jiu , Wang Yangping , Dang Jianwu
Published: March 2021

In order to guide students to master Arduino development board, sensors, unity3d and other software and hardware application methods, familiar with the development process of virtual reality and intelligent hardware control platform. Learning from the WeChat "jump and jump" finger game, based on virtual reality technology and Arduino intelligent hardware control platform, the virtual intelligent fitness device with good immersion, strong interactivity, and combining entertainment, exercise and virtual experience is developed and designed. The "virtual reality + Arduino" immersion interactive experimental platform provides immersive and interactive immersive helmet and desktop screen display modes, uses a variety of intelligent control methods such as in-situ jumping action or grip to replace the finger pressing action in WeChat to control the jump of the game model, and can choose the sky, ocean, land and other fitness Scene, to achieve physical exercise and intellectual purposes. In the process of case design and production, virtual reality immersion equipment, grip and running pad are combined with fitness to cultivate students’ comprehensive practical innovation ability.
Research on TMS-based Business Channel Bearing Compilation
Authors: Zhang Lixia , Yu Mengxi , Xue Honglin
Published: March 2021

This article is based on a comprehensive analysis of application bearing work methods and specific business models according to various types of power grid transmission services. For different application methods of power grid transmission services on each service transmission network and data transmission to the service network channel bearing work the way of analysis is different. Based on the security level of the power grid transmission service, the method of carrying the service transmission channel network, the method of carrying the service transmission network, the direction and flow of the service, this paper analyzes the way of carrying the channel on the business network.
High Capacity Blind Information Hiding Based on Autoencoder
Authors: Bao Zhenjie , Jin Yadong , Liu Yue , Hu Jingyun
Published: March 2021

To realize image information hiding, we train a multi-layers autoencoder includes an encoder and a decoder. Using encoder architecture, we input the secret color image and generate the cover image where the size stays the same directly. In addition, we reconstruct the secret color image by inputting the stego images passing on the decoder which accomplish the secret image blind extraction. Our method realizes a high resolution and high payload color image steganography. Experimental results show that we can realize the high capacity blind specified secret images information hiding automatically by our method.
Structure design of a new carrot grading device
Authors: Wang Jian , Li Zhenhua , Guo Junwang
Published: March 2021

In this paper, aiming at the design of the sorting device for rod-shaped vegetables and fruits, the research status of grading device at home and abroad is analysed, and a variety of grading device mechanisms are compared, and the design scheme of a variety of carrot grading device is determined. Through analogy analysis, a carrot grading device is designed. The grading device is composed of cleaning and feeding device and automatic grading device. The cleaning uniformity device is mainly to put carrots in the pool for cleaning, and then the motor operates, and the conveyor belt with inclined partition starts to work, and the carrots are transported to the grading device through the partition board. The principle of automatic grading device is to grade carrots by adjusting the gap between two adjacent conveyor belts. The gap size is arranged from small to large in order to realize automatic grading according to the diameter of carrots. In this paper, the following aspects are analyzed: by comparing the mechanism of other grading device, the carrot grading device is analyzed and designed. The mechanical part is designed to be three-dimensional using Pro/E modeling, as well as part modeling and assembly. At present, there are some defects in the design of rod-shaped vegetable and fruit grading device in our country. The research has filled the defect and has high practicability.
Cross-model retrieval with deep learning for business application
Authors: Wang Yufei , Wang Huanting , Yang Jiating , Chen Jianbo
Published: March 2021

Cross-modal retravel has been used in many fields, such as business and search engines. Most search engines for business are text-based, but text-based search engines are limited by equipment and the strict requirement for knowledge. Text-based search needs keyboards to finish the search process, which requires users to have the knowledge of using keyboards. Compared to the text-based search, audio-based search has advantages. First, it avoids the traditional ways of inputting information. And it gets rid of the gap in time between inputting information for searching and getting useful information. In this paper, we propose a way to use audio to search images for business applications. We use deep learning to implement cross-modal retrieval systems between images and audio. We first extract features from images and audio respectively. And then we implement a neural network with two identical networks to learn the correspondence between images and audio. The first network extracts the features from images and audio further for calculation, and the second network learns whether two features from different modalities are related. This research provides a new way for business applications to search for information more instantly.
Prediction of Patients’ Length of Stay at Hospital During COVID-19 Pandemic
Authors: Pei Jianing , Lin Xin , Chen Qixuan
Published: March 2021

Machine learning has been extensively used in diverse healthcare settings since the 21st century. Statistical models are proven to be powerful in detecting early disease symptoms and could potentially aid decision-making in the healthcare system. To help improve medical resource allocation during COVID-19 pandemic, we aim to develop machine learning models that predict each patient’s length of stay (LOS) in hospital. Three machine learning models, namely, K-nearest Neighbors Algorithm, Logistic Regression and Random Forest are implemented and optimized on the same healthcare dataset. The final accuracy of each model is 0.3442, 0.3524 and 0.3541 respectively, which are not very high. Our subsequent correlation analysis on the healthcare dataset shows the patients’ features used do not provide sufficient information for accurate LOS prediction. Yet, machine learning approaches could potentially yield much better results if the data quality can be improved by including additional relevant patient features and breaking LOS into more appropriate intervals. More detailed healthcare data should be obtained to make the LOS prediction useful for healthcare management.
High-Performance Secure Access and Data Privacy Protection Method for 5G Border Routing Gateway
Authors: Fang Yunhui , Wang Jihua , Ying Xiaolei , Wang Rongli
Published: March 2021

With the substantial increase in the amount of data information and the development of 5G technology, boundary computing technology based on 5G, as a real-time and efficient data processing method, has broad application prospects. The aggregation gateway further aggregates the power injection data of all electric energy storage units and sends it to the power company. The power company uses its own private key to access the aggregated data. Row decryption to obtain the total power data recovered in each time slot. The paper proposes a new solution using Lagrangian interpolation to ensure data privacy and security. The security shows that the algorithm can not only protect the privacy of the electric energy storage unit, but also realize the confidentiality and integrity of the injected data. Efficiency analysis shows that this algorithm can significantly reduce computational complexity and improve communication efficiency.
A Robust Segmentation Algorithmfor for 3D Complex Meshes
Authors: Hou Yu , Zhao Yong
Published: March 2021

Segmenting 3D mesh is a difficult topic in computer graphics. This paper proposes a new mesh segmentation algorithm. First, we over-segment the input mesh to generate a series of superfacets. Second, we introduce a novel region fusion algorithm to obtain the segmentation result. Various experiments show that our algorithm is able to handle 3D meshes with complex shape and rich details. Even though the input mesh has noises or holes our algorithm can still achieve satisfactory results.
RETRACTED: Research on Computer Programming Optimization System Based on Big Data Technology
Authors: Lu Haiyang
Published: March 2021

To improve network programming efficiency, the paper proposes a network automatic programming method based on big data analysis technology. Build a big data analysis model for automatic network programming. The dissertation uses the distributed information fusion method to extract the significant data feature of automatic network programming, extract the associated feature quantity of automatic network programming big data, and combine the fuzzy membership analysis method to carry out the synthesis operation and fuzzy comprehensive evaluation decision of automatic network programming and build network automation Programming multi-level index evaluation system to realize automatic network programming optimization.
Using K-Means Algorithm and Convolutional Neural Networks to Identify Alzheimer’s Disease in Coronal Brain Scans
Authors: Qiao Hanquan
Published: March 2021

Accurate diagnosis of Alzheimer’s Disease (AD) is of great importance to patient care, especially in the early stage, because it enables patients to take preventive measures before irreversible brain damage occurs. Obviously, if computer-based diagnostic models can make better predictions than doctors, the future of health care will change dramatically from the current system. Based on magnetic resonance imaging (MRI), this paper realizes a classification algorithm to distinguish AD patients from normal people. OASIS Brain Imaging Data Set is an open source online data set, which is a coronal bitmap of the human brain. Canny edge detection algorithm is used to extract image information, and K-Means and convolution neural network (CNN) are used to train the data set. The results show that the recognition accuracy of the training set is 99%, and 26% higher than that of the K-Means algorithm, which can be effectively used in the early diagnosis of Alzheimer’s disease.
Research on Multimodal Emotion Analysis Algorithm Based on Deep Learning
Authors: Xiao Xuan , Yang Jie , Ning Xinyi
Published: March 2021

In recent years, more and more people are keen to express their feelings and opinions in the form of pictures and texts on social media at the same time, which makes the multimodal data with pictures and texts as the main content growing. Compared with monomodal data, multimodal data contains more information and can reveal the real feelings of users. The analysis of the emotion of these massive multimodal data is helpful to better understand people’s attitudes and viewpoints and has a wide range of application scenarios. In order to solve the problem of information redundancy in multimodal emotion classification tasks, based on the tensor fusion scheme, a multimodal emotion analysis method based on attention neural network is proposed. This method constructs a text feature extraction model and an image feature extraction model based on attention neural network, which highlights the key areas of image emotional information and the words containing emotional information, which makes the expression of single-modal features more concise and accurate. The tensor product of each mode is regarded as the joint feature expression of multimodal data, and the redundant information of joint features is eliminated by principal component analysis, and then the emotion category of multimodal data is obtained by support vector machine. The proposed model is evaluated on two real Twitter image data sets. The experimental results show that, compared with other emotion classification models, this method has a great improvement in classification accuracy, recall rate, F1 index and accuracy.