bluuebunny/crossref_metadata_2025 huggingface dataset:
Real-Time Sensing and Fault Diagnosis for Transmission Lines
Authors: Shakiba Fatemeh Mohammadi , Shojaee Milad , Azizi S. Mohsen , Zhou Mengchu
Published: December 2022

Article Real-Time Sensing and Fault Diagnosis for Transmission Lines Fatemeh Mohammadi Shakiba 1, Milad Shojaee 1, S. Mohsen Azizi 1,2, and Mengchu Zhou 1,* 1 Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark 07102, NJ, USA. 2 The school of Applied Engineering and Technology, New Jersey Institute of Technology, Newark 07102, NJ, USA. * Correspondence: mengchu.zhou@njit.edu     Received: 12 October 2022 Accepted: 8 November 2022 Published: 22 December 2022   Abstract: Protection of high voltage transmission lines is one of the crucial problems in the power system engineering. Accurate and timely detection and identification of transmission line short circuit faults can considerably improve and simplify their recovery process and hence save the costs associated with the downtime of a power system. Hence, it is essential that a robust and reliable fault diagnosis system completes its operation within an acceptable time window after fault occurrence in the presence of uncertainties and disturbances in the system. The significant costs of mistakenly detected or undetected faults based on the conventional techniques motivate us to present a robust detection and identification system by using the convolutional neural networks. The robustness of this technique is analyzed for the variations of the phase difference between two connected buses, fault resistance, source inductance fluctuations, fault inception angle, local bus voltage fluctuations, and measurement noises. The time delay analysis is also conducted to indicate that the presented technique is able to detect, identify, and estimate the location of faults before tripping relays and circuit breakers disconnect a faulty region.
Employee Resourcing Strategies and Performance of Brewery Companies in South-East, Nigeria
Authors: Ikwuka Promise Chiagozie , Ikon Michael A , Onwuchekwa Faith C
Published: December 2022

Objective: In Nigeria, the brewery industry has over time been confronted with a couple of challenges ranging from increased taxation to the burgeoning influence of technology on the online marketing of brewery products. Thus, the current research looked at employee resourcing (ER) strategies and the performance of brewery companies in South East, Nigeria. Methods: Four research questions were raised for the study while testing was done for four hypotheses at 0.05 level of significance. The study considered correlation research design for adoption. 3,222 employees of brewing companies in South-East, Nigeria constituted the population for the study. The sample size was 315 employees. Data collection was facilitated with the use of questionnaire. The instrument for data collection was validated by three experts in the Department of Business Administration, Nnamdi Azikiwe University, Awka. The reliability of the instrument was established using Cronbach alpha, which yielded 0.82 coefficient. Analysis of data was done using Pearson product moment correlation coefficient for research questions and Pearson Correlation Critical value table for testing hypotheses. Results: The revelation of findings of the study was that a high positive relationship existed between ER and performance of brewery companies. Conclusion: The conclusion of the study was that a significant relationship existed between ER (employee recruitment, selection, placement and career development) and performance of brewery companies. One of the recommendations of the study was that the organization of seminars and workshops should be carried out by employers for the employees to ensure that their career is considerably developed for optimum performance in brewery companies.
Online Dating Scam Victims Psychological Impact Analysis
Authors: Wang Chenyang
Published: December 2022

In an era of widespread mass marketing scams on the Internet, many victims have reported varying degrees of financial loss and psychological damage after encountering lottery scams and advance payment scams. Among them, the emotional damage to victims of online dating scams may be even more severe because the whole scam process involves mental attachment, sexual abuse, and relationship breakdown. There is little help and support for victims throughout the scam process and even after the scam is over, which not only makes it difficult for victims to get timely and professional assistance after experiencing online scams, but victims even run the risk of being scammed by criminals again afterward, so timely help and professional psychological treatment for victims is of positive significance. In previous studies, there are fewer reports summarizing and analyzing the psychological conditions of victims. In this paper, we will summarize the psychological problems of victims of online dating scams and compare the psychological treatment needed by victims of online dating scams who experience online aggression with the psychological treatment needed by victims who are actually violated in reality. For example, professional treatment for real victims of sexual assault has methodological merit for victims of online fraud, methods of privacy and psychological protection for victims of online romance fraud, criteria for measuring psychological status, and more. These are all measures to promote enhanced victim care and the prevention of online dating fraud throughout the industry.
Research on Capital Operation Capability Evaluation of Energy State-owned Enterprises Based on Analytic Hierarchy Process
Authors: Liao Jianhui , Xiao Hanxiong , Liu Zuoming
Published: December 2022

Improving the capital operation capacity of state-owned enterprises is an important goal of the reform of the state-owned capital authorized operation system. In the field of energy, reforming and improving the capital operation capacity of energy state-owned enterprises can effectively promote energy transformation. This paper uses the capital operation capability evaluation model constructed based on AHP to find that the capital operation capability of five typical energy central enterprises presents the results of “National Energy Group> PetroChina Group> State Grid Corporation> State Power Investment Corporation> China Southern Power Grid Corporatio”, which are all lower than the benchmark enterprise China Resources, but The average level is roughly comparable to that of China's new country.
A study of Bilibili’s communication strategy based on the 5W analysis model
Authors: Jin Yiwen
Published: December 2022

This study is based on the 5W analysis model to explore the communication strategy of bilibili, one of the most successful video sites in recent years, whose development strategy has attracted much attention. The company was founded only 13 years ago, and its target users are mostly today’s young people. To a certain extent, it represents and leads the development trend of the industry, so it is worth studying. This study adopts a survey, literature, and case study method. It concludes with five aspects: the subject of information communication, the content of information communication, the manner of information communication, the audience of information communication, and the effect of information. This study also discusses the issues involved and proposes three suggestions: strengthen self-correction and improve the mechanism of rights protection, clear their positioning, enhance user stickiness, improve the audit mechanism, and achieve personalized recommendations. Finally, the paper summarizes and concludes the research results, once again outlining the successes of bilibili's communication strategy and briefly suggesting the shortcomings of the study due to objective reasons and the prospects for future research.
Research on the Impact of the Metaverse on the Future of Social Networking
Authors: Huang Yiwen , Jin Yutian
Published: December 2022

As a technological concept that promises to seamlessly connect the real and virtual worlds, the concept of the Meta universe has been hotly debated by a large number of Internet users even before it was implemented. Considering the particularity of this concept, it is not difficult to imagine that this new industry, once launched, will have a near revolutionary impact on the entire social network. This paper will list case studies and questionnaires as survey methods. This article summarized the industry’s status and investigated regional opinions about the Meta Universe, which gives an industry profile to the relevant company or the company that intended to participate in the production of Meta universe. Thus, they can decide the direction of development and which strategy to utilize in the program. In addition, some suggestions for potential problems in the metaverse field in the future, the aspects that need to be paid attention to for the anti-addiction mechanism and legal regulation are all includ in this paper for the reference of relevant enterprises, so as to bring better user experience for the masses.
The Relationship between Parenting and Self-Regulated Learning of Children and Adolescents
Authors: Li Shuyu
Published: December 2022

Childhood and adolescence as the critical periods for people to form many learning and behavioral patterns, have lasting effects into adulthood. Thus, parents should give their children proper education and guidance at these stages. Self-regulated learning (SRL) is a skill that can promote long-term personal development. Based on earlier research that identified various aspects of parenting, this paper reviewed the link of parenting to SRL and other related factors. The effect of parenting on SRL was discussed from three perspectives: the general relationship, the mediational roles, and the impact of other factors. Among them, the parenting style (i.e., authoritative, authoritarian, permissive, and uninvolved styles) as one of the particular representative dimensions of parenting was found that different types of it are correlated with different SRL skills. Therefore, depending on the specificity of the different dimensions, parents can consciously choose the more appropriate parenting style. Apart from the interaction between parenting and SRL, there are also other mediators. Plus, SRL can play a mediational role between parenting and other related factors. As these studies reviewed have limitations in terms of parenting context, such as ethnic homogeneity, future research could explore a more generalized hybrid parenting style in corresponding ethnic groups. The current review can provide some guidance to relevant parent education programs and research.
Analysis of The Transformation of China's K12 Education Model under The New Trend
Authors: Zhou Yangnan
Published: December 2022

Education for children is a fundamental part of the country, and China is committed to reforming education for fair, public, and public welfare. Based on the global trend of digitalization and the implementation of China's "double reduction" policy, China's K12 education model has undergone a new transformation. This paper has found through extensive literature research that the implementation of the double reduction policy, the outbreak of Covid-19, and the spread of digitalization have all had a certain degree of impact on the teaching and learning models of Chinese schools and supplementary education, and have accelerated the transformation of China's K12 education model. For example, school education has started to adopt a hybrid education model, and the subject-based training institutions in supplemental education have started to transform to other aspects such as quality education.
Towards Metaverse with Diversified Applications: Service Native Architecture
Authors: Jiang Yuxiang , Peng Li , Zhu Xiaojie , Ma Jinlan , Yuan Xiaozhi , Liu Zhan , Wang Qingyang
Published: December 2022

With the advancement of science and technology, Metaverse will empower the entity economy and social development, and stimulate the development potential of industries such as smart city. The current chimney-style application creation process is cumbersome, which cannot support the application diversification and efficient, flexible and open service provision methods, so it cannot meet the needs of the rapid development of the Metaverse. By introducing a service engine layer that encapsulates basic service capabilities, this research proposes a Metaverse application architecture based on service native, which has characteristics of function scalability, orchestration automation, system openness, full-type access, etc. The basic service capabilities based on this architecture can support diverse needs of Metaverse applications.
Agricultural Greenhouse Crop Information System based on Big Data and Cloud Computing Technology
Authors: Wang Ziyun , Pan Jiayong
Published: December 2022

With the further promotion of urbanization in China, the arable land area in China is decreasing year by year, and it is very important to make full use of the existing land resources. At present, most areas in northern China have greenhouses. Since temperature, humidity, light, and CO2 concentration directly affect the yield of crops, how to provide a suitable environment for crops to grow in greenhouses is a topic worth investigating.
Forecast and Analysis of Reasons for Changes in the Number of Students Studying Abroad
Authors: Li Zhaohui
Published: December 2022

Since 2000, the number of students studying abroad in China has been growing continuously. Based on the macro data of National Bureau of Statistics from 2005 to 2021, this paper analyzes the degree of influence of variables such as economy, epidemic, and policies on the number of students studying abroad, and constructs a GM (1, 1) model using SPSSAU to calculate the predicted values of variables for the next two years, and Multiple linear regression models, machine learning models, and time series models were constructed using Python, Eviews, and SPSS software to predict the future trend of the number of study abroad students; and based on this, a combination model based on weight assignment was constructed. The research results prove that the combined model has higher accuracy than the single model.
Convolutional Neural Network Structure Optimization based on Network Pruning
Authors: Zhong Xudong
Published: December 2022

Recently, the number of layers of neural network model is deeper and deeper, the number of parameters is more and more, and the calculation scale is also larger and larger. This improves the use conditions of some excellent models, which is not conducive to the wide application of deep learning methods in more fields. In view of this trend of increasing the size of neural network models, in this paper, we optimize the structure of a convolutional neural network model for image super-resolution, which reduces the size of the model. The model structure optimization method we use is network pruning, which simplifies the number of layers and parameters of the model, improves the effect of the model and reduces the computational consumption of the model. The key insight of network pruning is to remove the relatively redundant and unimportant parts of the network to make the original network sparser and more streamlined. And the simplified model can keep the original performance. The original model used a cascade structure for multiple sampling, resulting in the increase of the scale of the neural network. By removing the redundant sampling structure and retaining only one sampling process, the number of layers of the model is reduced to 1/3 of the original. Under the same data set (BSD300) training, the PSNR (evaluation index of model effect) of the model is improved from 24.471 db to 24.490 db, and the training time is reduced by 13.8% of the original.
Research on SLAM Path Planning of ROS Robot based on Lidar
Authors: Hu Haolin , Sun Linjie , Xu Huizhi
Published: December 2022

In order to improve the autonomous navigation performance of robot, an automatic mapping and path planning method based on ROS robot is proposed, which uses two-dimensional laser radar to collect the surrounding environment. Gmapping algorithm is used for automatic optimization and mapping, Class A algorithm is used for global path planning, and DWA method is used to realize the local obstacle avoidance function of the robot. Experiments show that this method can realize the automatic generation and automatic navigation of the robot.
Innovative Expression in Graphic Design based on Animal Patterns in Huangmei Cross-stitch
Authors: Zhang Ying , Han Xiaoshi
Published: December 2022

Huangmei cross-stitch is a traditional handmade craft with great regional charm and cultural conservation. Extracting cultural elements for innovative design can not only improve its modern significance, but also promote its dissemination and development, so as to provide new development ideas for intangible cultural heritage in the new era. This paper makes an innovative visual exploration for Huangmei cross-stitch by means of innovative graphic expression, and strengthens pattern innovation, color innovation and expression innovation in the graphic design and creation of Huangmei cross-stitch. Through systematic analysis, a series of innovative expression designs based on animal patterns in Huangmei cross-stitch are completed in graphic design, so as to activate the vitality of intangible cultural heritage, improve the visibility of Huangmei cross-stitch in daily life, and make it go to life, the public and the future with graphic design techniques.
Method Analysis of Compensating Polarization Mode Dispersion in Optical Fiber Communication System
Authors: Liu Changjingzi
Published: December 2022

At present, optical fiber communication systems are developing in the direction of large capacity, high speed, long distance, etc., making nonlinear effects and polarization mode dispersion (PMD) and other optical fiber performance defects that were negligible for low-rate systems become the main factors limiting system upgrades and transmission distances. Polarization mode dispersion is an important factor affecting the performance of optical fiber communication systems, and it has become one of the main obstacles to the development of high-speed and long-distance optical fiber communication systems. It can cause pulse widening in the digital transmission system, thereby limiting the transmission rate of the system. Therefore, the influence of polarization mode dispersion on the transmission system and the compensation method are analyzed in this paper.
Review of Integrated Diffractive Deep Neural Networks
Authors: Sheng Huayi
Published: December 2022

An integrated photonic diffractive deep neural network ( ID^2 NN) is one of the most exciting cross-discipline fields of artificial intelligence and optical computing, combining deep learning with the power of light-speed processing on an integrated platform. We know that neural network in a digital computer is based on transistors, which have significant challenges in keeping pace with Moore's law and limited real-time processing applications due to the increased computational costs associated with them. However, with remarkable progress and advancement in silicon photonic integrated circuits over the last few decades, ID^2 NN hold the promise of on-chip miniaturisation and high-speed performance with low power consumption. This paper covers the essential theoretical background for constructing the  ID^2 NN and reviews the research status of optical diffractive neural networks in the field of neuromorphic computing. Problems of narrowing down current ID^2 NN applications are also included in this review. Finally, future research directions for ID^2 NN are discussed, and conclusions are delivered.
Control System and Routing Network under Vehicle-to-Vehicle Communication
Authors: Chen Desong , Wang Zhe
Published: December 2022

This paper first studied platooning in vehicle-to-vehicle communication. Road safety has always been a bit problem in our society, driving with help of platooning control system becomes necessary. This paper compared different methods and tried to get the minimum driving gaps between vehicles depending on driver preference, car size, current speed limit and so on. After evaluating car platooning, this paper studied further information about road networking by analysing different routing network techniques. Graph Attention Network (GAT), Generalized Value Iteration Network (GVIN), Multi-Agent Routing Value Iteration Network (MARVIN). Either method have pro and cons, Marvin has generally good performance and a relatively low price. With the development of vehicle communication, MARVIN could be the main field because of its future potential.
A Review of Innovative Comparator Designs
Authors: Zhang Haoyue
Published: December 2022

Three papers on the optimal design of comparator circuits are further analyzed in this work. Each paper presents a method to improve the performance of comparators. Floating inverter amplifier applied an independent capacitor as the source of the preamplifier, which improves the overall performance of the circuit. In another design, a special local clock generator is proposed to control the input of both of the latch stage and the preampliﬁer, which makes it possible to adjust the speed and improve the energy efficiency. In dynamic bias circuit design, stabilized common-mode voltage is realized by adding a capacitor to the tail of the pre-amplifier of a latch-type comparator, optimizing the power and noise performance successfully.
Deaerator system pressure and liquid level PID regulation control strategy
Authors: Chen Xingchen
Published: December 2022

Excessive oxygen content in the feed water of industrial boilers will cause oxidative corrosion on the metal surface, resulting in grooves or even thinning of the metal tube wall, resulting in trachoma until it is completely damaged. Therefore, the quality of the deoxidation effect greatly impacts the service life of industrial boilers and directly affects the economic benefits of enterprises. Automatic equipment and PID parameter adjustment are used to improve the deoxygenation performance of the deaerator system, making the oxygen content of the water in the industry meet the standard, thereby reducing the oxidation and corrosion of pipelines and prolonging the practical life of the equipment. This article mainly introduces Shanxi Yaxin Energy Group Co., Ltd. and Xinneng Technology Co., Ltd. 's 220-ton CDQ coke oven with co-production 120T SS98 high-temperature and high-pressure steam boiler, supporting a set of XNC-130 deaerator produced by Lianyungang Huagang Power Equipment Co., Ltd., the design output is 130t/h, the working pressure is 0.03MPa, the working temperature is 104℃, the design pressure is 0.3MPa, the design temperature is 120℃, the water tank volume is 50m³, and the material Q345R. The system uses Siemens PLC, Rosemount pressure transmitter, regulating valve and other equipment combined with PID control algorithm to achieve pressure and liquid level adjustment and the best deaeration effect.
Ideal Advanced Amplifier Technology
Authors: Chang Zhuohao
Published: December 2022

A signal's amplitude or strength can be increased using an amplifier, which is a crucial component of signal processing in automation technology tools. The energy source is controlled using the input data, and the energy source also supplies the power needed for amplification. This results in the amplification of the amplifier. Although the amplifiers sold in the market are of good quality, the circuits are complicated and expensive, which are not easily accepted by consumers. By improving the technology of today's amplifiers and striving towards ideal amplifiers, that is, noise-free, with infinite gain, infinite input impedance, zero bias current, and zero detuning voltage, regardless of package size, energy conversion efficiency can greatly improve energy conversion efficiency and reduce energy consumption. The improvement of the amplifier process itself, the reduction of cost and power consumption are also driving the communication technology and the overall technology of human beings to a new level.
Design analyst of low energy, high gm/Id, and high sensitivity comparator
Authors: Zhang Yuxin
Published: December 2022

This paper analyses three innovative designs of comparators and those structures have better performance than the traditional comparator. The dynamic floating inverter amplifier improves energy efficiency by preventing full discharging and charging. The Dynamic Bias Latch-Type Comparator used a double-tails latch to decrease energy consumption. The charge-injection compensations comparator has better sensitivity and less noise by utilizing the feedback loop. Those methods have greatly increased voltage gain, energy efficiency, and gm/Id
Study on Electric Card Effect of Lead-free Piezoelectric Ceramics
Authors: Ma Jianxing
Published: December 2022

The electrocaloric effect of ferroelectric materials can be used for refrigeration. This new method has the advantage of high efficiency, environmental protection and lower cost. Its variable size can satisfy the cooling requirements of different devices. However, it still exist some problems of lead-free ferroelectric ceramics refrigeration: its refrigeration temperature is less than 1 K; refrigeration temperature range is narrow; working temperature is either too high or too low. Sodium bismuth titanate (Na0.5Bi0.5TiO3, NBT) material stands out and becomes the most promising candidate to replace lead-based materials. Properties of NBT almost meet the test requirements. Near depolarization temperature, this material shows ferroelectric/antiferroelectric phase transition, which brings a larger change in electric heating temperature. In this paper, electric card effect, lead-free piezoelectric ceramic materials and the BNT-xST ceramics were introduced in detail. Among these materials, BNT-xST is considered to be a promising material due to its excellent ferroelectric property and large electromechanical coupling coefficient.
Performance analysis of high-speed, low-power comparators
Authors: Du Chengze
Published: December 2022

This article mainly presents a summary of development of dynamic comparators and the optimization to conventional comparator in recent years. By comparing the design of two different comparators, the design method of less power consumption, high speed or small delay, and low input referred noise can be concluded. The Dynamic comparator is designed to have small delay and less power consumption compared with two-stage comparator. The dynamic-bias comparator spends less power for operation the circuit compared with double-tail comparator. The FIA comparator operates under the controlling of logic NOR gate.
CsPbX3 Perovskite Quantum Dot Laser
Authors: Wang Yuhao
Published: December 2022

Quantum dot laser, which is well known as the 3rd generation of semiconductor laser, has attracted extensive attention of researchers in recent years. Compared with typical semiconductor laser, quantum dot exhibits the characteristics of low threshold, large laser gain, tunable bandgap, which make it promising for laser applications. Among the various quantum dot lasers, perovskite quantum dot laser is one superior type. Perovskite is a group of material with the structure of ABX3. This group of material is commonly used in solar cell and light emitting device such as perovskite quantum dot blue emitting diode, due to its excellent optical properties of narrow linewidth and high luminance. The perovskite quantum is also found to be a good material of laser gain material. Among all classes of perovskite, CsPbX3 has become an expected material for perovskite quantum dot laser. This work will conclude the theory of quantum dot laser and properties of CsPbX3 quantum dot laser based on current papers and reports.
Thin Film Transistor - Basic Principles and Commercial Status
Authors: Lin Xingyu
Published: December 2022

Thin Film Transistor, a semiconductor device, is now widely used in the field of displays, especially LCD. A correct understanding of the nature of various types of TFTs and their current situation in commercial market has a significant positive influence on obtaining the reliable prediction and economic benefits of the display industry or even other potential markets that have not received significant attention. The key characteristics of some representative TFT and their historical development process is introduced in this paper. Then the commercial application of TFT is discussed regarding display industry and other minor field. Finally, some possible future trends and relevant challenges are discussed.
Contrastive Analysis of Low Power Low Noise Amplifiers Used in Three Different Applications
Authors: Cao Lanzheng
Published: December 2022

In this paper, three kinds of low power low noise amplifier used respectively in biomedical applications, RF receivers and ultra-wideband (UWB) applications are compared and analyzed. Their prime simulation results are showed as well. Since, their application fields are different, the parameter characteristics of signals as well as their circuit structures and used topologies are various. In order to analyze them more clearly and distinctly, on one hand, the parameter characteristics of signals, which is vital factor when decide circuit structures and used topologies, are compared. On the other hand, their circuit structures and used topologies are introduced and qualitatively compared while their performance, such as band width, gain, noise, power, supply voltage, are quantitatively compared. Folded-cascode topology, current reused topology, inverter-based shunt feedback topology, and parallel summation structure are analysed in this paper.
Fractional frequency reusing technique based on emission interference temperature changes
Authors: Li Yansong
Published: December 2022

In order to reduce the impact on the transmission interference temperature on the transmission system, save the loss of signal transmission, and achieve efficient signal transmission. Thus reducing production costs and improving economic efficiency. In this paper, under the limitation of transmission interference temperature, based on the hive transmission model of 19-Cell, a fractional frequency reusing algorithm is designed by combining the advantages of frequency reusing algorithm in signal transmission with stable, efficiency and small loss.
Effect of Rain Attenuation on Millimeter Wave over Polarization
Authors: Shen Haopeng
Published: December 2022

Millimeter wave has been used in radar applications for a long time, and is increasingly used in new fields, among which high data rate telecommunications is the most prominent. Short wavelength and unique propagation characteristics provide challenges and opportunities for design engineers working in these fields. Millimeter wave has become an indispensable part of 5G mobile communication field due to its excellent spectrum characteristics. In order to help the development of millimeter wave equipment, this paper mainly studies the millimeter wave rain attenuation phenomenon through the combination of theory and simulation. The effects of rainfall rate and polarization mode on millimeter wave propagation attenuation are compared and summarized. In addition, the total attenuation of millimeter wave communication path under different polarization rainfall characteristics is compared. Finally, the total loss of different frequency millimeter wave rainfall links is compared and analyzed. It provides a theoretical basis for the follow-up design and practical application of millimeter wave communication system.
Research on Capacity of Network of Different Cells
Authors: Zhang XiWen
Published: December 2022

For the indicator system that affects user perception, voice services such as user traffic, average call duration, call drop rate, congestion rate, paging failure rate, call start failure rate, etc; For data services, such as user connection success rate, Internet access rate, etc. The following figure shows the system architecture of the web-based user awareness assessment system. Through the network infrastructure and signaling detection system, the original signaling monitoring data, policy data of each call, analysis data collection, core network traffic statistics and alarm information are collected on a platform, and then through the preprocessing of data, a report based on the user awareness evaluation system is generated to identify problems before users, solve problems in time and provide work efficiency, Provide user perceived satisfaction. The purpose of the research is to find out the influence of the add or decrease of the base station to the capacity of the whole network in order to deal with it when we build or rebuild some base stations in the network. The research takes use of the Gaussian white noise channel as the model of the channel. And every single cell is divided into two parts to calculate the interference and the capacity of the channel. The standard to divide the cells is the base station. As the number of cells increases, the capacity of the whole network increases.
Classification for Covid-19 Diseases Based on Ensembled Models
Authors: Xiao Guanchen
Published: December 2022

After Covid19 became a worldwide health issue, rapid diagnosis based on clinical symptoms from many diseases with similar symptoms to Covid19 became important to slow down the spread of the pandemic. This study attempts to find ways to classify and diagnose diseases with the help of computer technology quickly and accurately. In this study, the author developed an ensembled machine learning model to categorize four diseases using information on their distinct clinical signs. The authors used a Support Vector Machine (SVM) and Artificial Neural Network (ANN)-based ensemble model. To improve the accuracy of the classification result, this model adds the strong classifier SVM to the result of an intermediate hidden layer of the fundamental ANN deep learning model. The result of the study shows that the integrated model's prediction performance is significantly better than that of the original ANN model after the support of another strong classification algorithm. In conclusion, the effectiveness of the proposed method was proved for classifying the symptoms of patients with allergies, colds, flu, and Covid-19 in this study.
Measurement and Application of VNA
Authors: Qin Tianyuan
Published: December 2022

The vector network analyzer is the most important measurement instrument in communication antennas. In order to characterize the microwave components and the front-end of wireless systems, the vector network analyzer is the most commonly used frequency domain measurement platform. The uncertainty analysis of its measurement results is one of the hot topics in the field of instrumentation and measurement. An in-depth analysis of measurement uncertainty introduced by different calibration methods is the quantitative basis for reasonable selections of self-calibration methods. In frequency domain channel measurement, multiple frequency points need to be measured, and there is a strong correlation between the measurement results of each frequency point, which effectively gives a reasonable choice of the measurement method. The impact of the effective assessment is combined with various experiments, tests and practical comparative analysis of the obtained data.
Smartphone Wireless charging
Authors: Su Yuxiang
Published: December 2022

Smartphones are gradually becoming the most important personal device. In the first quarter of 2013, global smartphone shipments reached 216 million, which is approximately twice as large as in 2011.[1] In the absence of breakthroughs in mobile phone batteries nowadays, mobile phones are unable to run for long periods. For devices to work continuously, the convenience of their charging method is important. Wireless charging is a better solution to get rid of the charging cable and the convenience it brings. One of the main objectives of this paper is to find ways to improve the efficiency of wireless charging by analyzing different designs of wireless charging models, dual coil charging lines, dual charging frequencies, and coupling coefficients as well as the influence of the coil on charging. Based on the review of the different designs, it was found that the dual coil design can improve the charging efficiency in terms of quantity. The dual-charging frequency design improves the versatility of wireless charging. Variations in the number of turns and coupling coefficients of the coils can improve the efficiency of the transmission.
Emergency study of personnel evacuation based on metacellular automata
Authors: Feng Yujun , Chen Cheng , Zheng Yuting , Wang Dong , Zhu Yongjian
Published: December 2022

The problem of evacuating people in emergency situations has become particularly important as the flow of people in various cities is rising with economic development, which leads to an increase in the scale of large-scale assembly events. In this paper, we analyze the evacuation effect caused by different key factors in the process of personnel evacuation by building a metacellular automata model. The study can effectively solve the problem of rapid evacuation and escape of people and help reduce casualties. This paper analyzes the effect of key factors on evacuation efficiency comprehensively based on specific conditions, and gives the optimal plan on different conditions. The advantages and disadvantages of the model are evaluated and discussed in this paper, and it is concluded that the model can also be effectively extended to different fields such as biology and defense.
Comprehensive Analysis of Electric Vehicles: State-of-Arts and Future Aspects
Authors: Ding Leiyi , Song Jiwen
Published: December 2022

In recent years, developing new energy vehicles has become a crucial approach for nations to address climate change. The United States, the United Kingdom, Japan, Germany, and China have implemented preferential policies for new energy vehicles to boost their development. In addition, several types of batteries and motors for electric vehicles fit diverse situations and market demands. This study extensively explores the major performance and crucial concerns of the key technologies for electrical vehicle application, including battery technologies, motor and pertinent control. Moreover, the future considerations for overcoming the constraints of state-of-arts are presented in this work.
Research of Heavy-Duty Gas Turbines through Computer Mathematical Statistics and Big Data Analysis
Authors: Heng Haoyu , Li Jitong , Zhou Tianyi
Published: December 2022

Heavy duty gas turbine is the core power equipment of energy efficient conversion and clean utilization system in the 21st century and even longer. It is important for an efficient, clean and safe energy system. The heavy duty gas turbine is developed and manufactured at a level that represents a country's heavy industry and is by far the most efficient thermoelectric conversion equipment. This paper introduces the development status of the heavy duty gas turbine industry at home and abroad, summarizes the working principle and characteristics of heavy duty gas turbines, and prospects the development trend of heavy duty gas turbines.
Design and Risk Analysis of an Escalator Safety Step
Authors: Chen Zhuo , Wan Shuai , Chen Zhonggeng
Published: December 2022

In view of the prominent potential safety hazards and frequent accidents of escalator step gap, this paper makes an in-depth analysis of escalator movement gap from the perspective of risk prevention and control, and puts forward a safe step structure, which can effectively isolate passengers from movement gap, greatly reduce the safety risk of movement clearance, avoid involvement in accidents and improve the overall safety performance of escalator. It is conducive to extensive promotion and application.
Lithium-Ion Battery Development with High Energy Density
Authors: Chen Pengfei , Lin Ziwei , Tan Tian , Zhang Yongzheng
Published: December 2022

With the increasing development of technology, the battery's energy density has improved significantly, which led to improvements in numerous fields, such as the manufacture of electrical vehicles and phones. However, we found out that the battery's energy density is still not as high as expected. For example, electric aircraft are still not ready for mass production as the cost of the production is magnificent. This report will start with the introduction of batteries and how batteries are related to electrical cars to find out the energy density problems of batteries and how to solve those problems. Next, there will be an introduction to electrodes and electrolytes. We will focus on the different properties provided by different materials used to make them up and how to select them.
RF Circuit EMI Suppression and EMC Analysis
Authors: Wang Jialiang
Published: December 2022

The radio frequency circuit will generate strong electromagnetic interference in the process of signal transmission, and its own resistance to electromagnetic interference is weak, and the radio frequency circuits operating in the same electromagnetic environment are prone to mutual interference. Therefore, it is necessary to analyze the electromagnetic interference effect of radio frequency circuits, and then find effective suppression measures, build a good public electromagnetic environment, realize electromagnetic compatibility, and ensure the reliability of signal transmission. This research first briefly introduces electromagnetic interference and electromagnetic compatibility and then analyzes the key points of electromagnetic interference suppression in radio frequency circuits. On this basis, the specific application of electromagnetic interference suppression and electromagnetic compatibility technology of radio frequency circuit is discussed. It can serve as a guide for the design of the radio frequency circuit by analyzing the characteristics and suppression mechanism of the electromagnetic interference of the radio frequency circuit. To ensure the suppression impact of electromagnetic interference, various suppression measures are broadly implemented in accordance with the three components of electromagnetic interference. The electromagnetic compatibility-based design of RF circuits can reduce the mutual interference of RF circuits in the system and guarantee the stability and dependability of signal transmission.
Speed identification technology in speed sensorless machine drive systems
Authors: Shao Bokai
Published: December 2022

Speed control system based on speed sensorless system is a research and project which is widely concerned by the international electric drive industry. The researchers found that the speed sensorless system has better rotation rate measurement, which is no longer affected by temperature, humidity, and other environments. However, there are higher requirements for the accuracy and speed of revolution measurement and feedback adjustment of the speed sensorless control mechanism. Therefore, the research topic of this paper is how to use a speed sensor to measure speed more efficiently. The research methods of this dissertation are as follows: second-order synovial observer, rotor tooth harmonic signal, and feedforward decoupling control are used to explore and analyze. It is found that the design of a second-order synovial observer can achieve better control performance in a high-speed range. Rotation speed can be obtained by using the harmonic signal of the rotor and current filter. At the same time, the rotation speed can be determined by the current Ideal model of an electromagnetic chain. Finally, the author makes a comprehensive comparison of the three methods, finds the problems of the three methods, analyses the causes, and puts forward possible solutions.
ابو حَيَّانَ وشَوَاهِدُهُ الشِّعرِيَّةُ النَّحويَّة في البَحرِ المحيطِ (سُورَةُ طَهَ أُنمُوذَجًا)
Authors: Elhammud Ahmed İbrahim
Published: December 2022

لقد تبوَّأَ الشِّعرُ مكانةً عظيمَةً في الأدب العربي سواءٌ قبل الإسلامِ وبعدَهُ، ولم يزل المهتَمُّون بالتَّفسير للقرآن الكريم يولونَ كبيرَ عنايةٍ بالشِّعر ويعدُّونَه المرجِع الأساس إذا ما أُغْلِقت عليهم الآيات القرآنيَّة، وهذا الاهتمام لم يكُن مقصورًا على عصرٍ دون عصر بل قد برزَ جَليًّا من لدُن عصر الصَّحابة والتابعين وأتباعِهم مُمتَدًّا إلى العصور الـمُتَأخِّرة لِلمُفَسِّرين، إذ كان الواحِدُ من الـمُفَسِّرين لَيسوقُ البيت الشِّعريَّ شاهِدًا ليدعَمَ ما ذَهَبَ إليه وارتآهُ من تفسيرٍ وفهمٍ للآيةِ القرآنيَّة؛ وهذا البحثُ يَصُبُّ اهتمامَه على مسألةِ خدمةِ الشِّعرِ العربيِّ لتفسيرِ القرآنِ الكريمِ، وذلك من خلالِ التُّراث التَّفسيريِّ الذي تركَهُ أثيرُ الدِّينِ أبو حيَّانَ الأندلُسِيُّ  في تفسيرِهِ البحرِ المحيطِ، والذي ركَّزَ فيهِ كثيرًا على الجوانب النَّحويَّة والإعرابيَّة إلى جانب علم القراءات حتى عُدَّ مرجِعًا لِكِلا العِلمَين. وقد قدَّم هذا البحث في البدايةِ شيئًا من سيرةِ أبي حيَّانَ ثمَّ انثنى إلى الكلامِ على تفسيرِهِ ومنهجِهِ الذي مَشَى عليهِ في تَأليفِهِ، ثمَّ انتقل إلى الكلام على قَضيَّةِ الشَّاهدِ الشِّعريِّ فبحثَ فيها وكيف نظرَ علماءُ السَّلَفِ إليها، ثمَّ خَلَصَ منها إلى الكلامِ على الشَّواهدِ الشِّعريَّةِ التي ساقَهَا أبو حيَّان في تفسيرِ سورةِ طَهَ وكيف كان يُحَلِّلُها ويبني عليها تفسيرَه أو إعرابَهُ للآيات القرآنيَّة، وقد ركَّزَ هذا البحثُ على الشَّواهدِ الشِّعريَّة الـمُتَعلِّقَةِ بعلمِ النَّحوِ، ثمَّ خُتِمَ البحثُ بعددٍ من النَّتائجِ والتَّوصِيَاتِ.
Interrelaciones en biomasa final de plántulas de fresa (Fragaria x ananassa Duch.) ‘Festival’ en un sistema hidropónico vertical
Authors: Alvarado Raya Horacio Eliseo , Rivera Del Río Roberto , Ramírez Arias J. Armando , Escamilla-García Pablo , Estrada Chavira María Eugenia
Published: December 2022

Los estudios de relación fuente-demanda dentro del estolón de (Fragaria x ananassa Duch.) son esenciales para configurar sistemas eficientes de producción de plántula en estolones colgantes. Esta investigación analiza, por medio de regresiones, la interrelación de peso seco de raíz y hoja de las plantas madre e hija dentro del corredor. Plantas de fresa ‘Festival’ se plantaron en abril de 2018 en una canaleta elevada a 1.7 m. Después de 239 días, se eligieron al azar 16 plantas con cinco corredores y con al menos cuatro plántulas por corredor. Se determinó el peso seco de raíz, corona y hoja; se realizaron análisis de regresión. Los coeficientes de determinación mostraron un efecto positivo de la raíz de la planta madre sobre el peso de la corona de las plántulas 1, 2, y 3 (R2 > 0.5), pero no de su aparto fotosintético (R2 < 0.07). También, el aparato fotosintético de la plántula tres es importante para el peso de las coronas de todas las plántulas en el corredor (R2 > 0.71). Como conclusión, el enraizamiento de la tercera plántula en el corredor sería importante para incrementar el número de plántulas de buena calidad en un sistema hidropónico de estolones colgantes.
DOI: https://doi.org/10.54167/tch.v16i3.991