bluuebunny/crossref_metadata_2025 huggingface dataset:
Structure and Surface Property of Carbon Films Deposited on Cemented Carbide by Electron Cyclotron Resonance Plasma Sputtering
Authors: Liu Xianwen , Shi Hongyan , Zhu Tao , Zhang Hao , Lin Guilin
Published: October 2023

With excellent properties in mechanics, optics and electricity, carbon film has been received much attention from the increasing scholars. In this study, we focus on the fabrication of carbon film on cemented carbide using electron cyclotron resonance (ECR) plasma sputtering. Electron irradiation and ion irradiation are achieved in ECR plasma sputtering system via the variations of substrate bias and magnetic coils to prepare carbon films, and then the structure, roughness, hardness and friction coefficient of carbon films are investigated. Analysis of Raman spectra indicates that the integrated intensity ratio (ID/IG) increases with the increment of positive substrate bias, but the minimum value of ID/IG occurs while substrate bias is -10 V. X-ray photoelectron spectroscopy (XPS) result shows that ion irradiation process can attain more sp3-C, which is beneficial to promote the hardness of carbon film. Roughness analysis reveals that step coverage effect appears in electron irradiation process, and friction experiments exhibit that carbon films prepared by electron irradiation process hold the lower and more stable friction coefficient. This study sheds light on the deposition of carbon film on cemented carbide by ECR plasma sputtering, which also substantiates that these kinds of carbon films are favorable to enhance the surface property of cemented carbide.
Experimental Study on High Performance Lithium Battery Anode Material Fe3O4@C
Authors: Liu Chen , Yin Bojun , Jia Guorui , Wang Jianbin , Zou Daijiang , Chen Ming
Published: October 2023

Compared with commercial graphite anodes, Fe3O4 has the advantages of high capacity, abundant reserves, low cost, and non-toxicity. It is a strong competitor for the next generation of power battery anode materials. In order to solve the problems of poor electrical conductivity and large volume changes of Fe3O4, this paper uses acetone and Fe2O3 nanocubes as precursors to prepare Fe3O4@C composites by one-step synthesis and etch them with HCl to prepare Fe3O4@C composite material of core-shell structures. The nanocube structured negative electrode material exhibits excellent electrochemical performance, and provides theoretical support for the development of the next generation high-performance lithium battery negative electrode material.The nanocube structure of the anode material showed good electrochemical performance.By changing the etching time, the space between the Fe3O4 core and the carbon shell can be easily adjusted. In the etching process, Fe3O4 cores with different size cavities can also be obtained. When the current density is 100 mAg-1, the specific discharge capacity can reach 874 mAhg-1. The good high capacity and high rate of new energy of Fe3O4@C is attributed to the design of nanocube structure.
The Application of MBD Technology in the Design and Manufacture of Typical Parts
Authors: Ren Cuifeng , Chen Xingyu , Wu Mingming , Mao Zhongmin
Published: October 2023

In this paper, the Model Based Definition technology was used based on the development and manufacturing module of 3D model design software. Based on the existing national standards for process symbols, the 3D process information identification, the formulation and marking of 3D process symbols, and the design of 3D process procedures was described in detail. The paper takes the 3D digital process design and manufacturing process of a shielding box component as an example, the secondary development of software such as PDM Link and Product View are used to the process of digitalization, The realization methods of digitalization, standardization and dynamic visualization of process information annotation of its 3D process model are studied, The research results are applied to the 3D process design and manufacturing of product model, realizing paperless manufacturing, and promoting the application of 3D process design and manufacturing in products.
Design and Implementation of Multiple Mobile Robot Control System Based on MQTT
Authors: Guo Zheming , Guan Lirong , Liu Zhaoming , Wang Hongwei , Cui Long
Published: October 2023

Currently, the programming of multi robot control systems is difficult and requires high requirements for robot terminals. In response to the drawbacks of complex programming and easy interruption of message redundancy during communication in existing multi robot control systems, a multi robot control system based on MQTT is designed. MQTT is used as the communication protocol for multi robot communication, and a mobile robot experimental platform is built, this greatly reduces the redundancy of messages and the difficulty of manipulation in the control process of multiple robots. At the same time, the system has the function of action reproduction, which can record the actions of mobile robot terminals, reducing the difficulty of programming and debugging. Through experiments, the superiority of using MQTT protocol to control multiple robots has been verified. This system allows the robot to complete synchronous coordination work by only receiving commands from the upper computer and executing commands sent by the upper computer to the robot client, avoiding the need for the robot CPU to process a large amount of information and reducing the production cost of the robot. By controlling the robot’s actions through a human-computer interaction platform, errors can be corrected in a timely manner, and control methods can be adjusted without worrying about the robot’s actions making mistakes due to previous programs.
Dynamic Characteristics Analysis of Transmission Line Live Working Robot
Authors: Mei Qijian , Zou Dehua , Jiang Zhipeng , Wang Zhao , Jiang Wei
Published: October 2023

The live working robot on the transmission line walks along the transmission line and carries out the maintenance operation on the transmission line with the help of the carried manipulator or instead of manual work, which has important practical application value. However, the complex working environment in the field puts forward new requirements for robot operation control and dynamics is the basis of robot operation control. Based on this, in this paper, the Lagrange method is used to establish the dynamic model of the operation process of the robot dual manipulator, the mechanical characteristics of the joint motion of each mechanism of the dual manipulator have been analyzed, Finally, the 3D model of modular dual-arm robot is imported into ADAMS dynamics simulation software and the motion curve of each joint of the robot manipulator in the operation process have been obtained by applying the driving function to the joint simulation, The simulation results show that the robot joint movement is continuous and stable, which can meet the mechanical characteristics requirements of bolt tightness during operation, the research in this paper has important theoretical significance and practical application value for the design of the joint drive mechanism of the transmission line modular two-arm live working robot.
Research on High Speed Precision Center Positioning System Based on Machine Vision
Authors: Liu Yanhua , He Gaoqing , Ye Jiansheng , Chen Bingxuan
Published: October 2023

For the complex unmanned environment, and even the special environment, such as nuclear radiation environment, high temperature and high pressure environment, etc., in order to overhaul the equipment, it is necessary to provide automatic operation equipment, the detection and monitoring equipment accurately sent to the detected position. This paper intends to use the remote method, control and detection classification, based on the Machine Vision scheme, the detected position, center of the circle, automatic positioning. This project adopts a two-level position positioning system. First, the AGV based on Machine Vision is used to initially locate the detected position, but the positioning accuracy of AGV can only reach 10mm, which cannot meet the requirements of 0.1mm. Therefore, a set of high-speed and precise secondary positioning system based on machine vision is added to facilitate real-time monitoring and provide positioning accuracy. The research contents include: 1) Research on the first level primary positioning system of remote automatic trolley based on Machine Vision; 2) Research on the secondary precision positioning system based on Machine Vision; 3) Research on the data filtering algorithm based on Machine Vision.
Simple Recursive Technique to Improve Closed Loop System Time Domain Analysis
Authors: Venkataraman Aravind Pitchai , Veerapathran Veeramani , Nokerov Suleyman Malikmyradovich , Khan Khalid Ali , Venkataraman Subramanian Pitchai
Published: October 2023

The control systems research society is highly focused on achieving the closed loop response with minimum time domain specifications such as rise time and settling time. By achieving the desired closed loop response with less performance indices and less time domain specifications, the objective of robust control design for a plant or process is achieved. In this paper, a novel computational method Error Recursion – Reduction Computational (ERRC) technique has been proposed to control dynamics in the industrial process, the proposed technique has been highly focus on reducing error and time domain specifications. The highly nonlinear two-tank spherical interacting tank is considered for analysis. The process models were identified as multi-linear models and model parameters were identified at various operating conditions with respect to the step-change technique. Optimised PI controller parameters were identified by using the conventional internal model control (IMC) based tuning technique and the closed loop results were compared with the results of the proposed method. The simulation results were outfitted to delineate the adequacy of the proposed method by comparing the results using time domain analysis and performance indices, in addition to this the robustness analysis was done using setpoint tracking and regulatory analysis. This technique will be recommended for industrial application, to minimise the error and the process reaction time.
Design of Self-Balancing Bike System Based on Autonomous Driving Technology
Authors: Tu Anjie , Fan Xiaotian , Wu Zhisheng , Chen Xiai , Zeng Tao
Published: October 2023

In this work, we present a self-balancing bike system based on the open-source Robot Operating System (ROS) and the momentum flywheel, and has designed a bicycle control system that can achieve autonomous balance and autonomous driving. This bike uses flywheel to maintain balance and uses lidar to achieve autonomous driving. The drive part control core is TC377 microcontroller. The motor driver is Odriver, which directly control the flywheel motor. The corresponding SLAM algorithms are developed and designed in Linux based on the ROS distributed operating system framework. It collects position information via gyroscopes, commands body balance by rotating the flywheel with Cascade PID controllers and FOC controller, and uses lidar and depth cameras to localize the position and posture of the bicycle body in real-time. It generate an optimal path based on the given target point to automatically identify and avoid surrounding obstacles. And Qt interface is used to adjust parameters and display data.
Helicopter Blade Dimension Measurement Based on Active Vision
Authors: Gong Wenhua , Liu Zhao
Published: October 2023

Blade dimension, include root thickness, twist angle, chord length, edge thickness, and airfoil thickness, are important indicators in assessing the quality of helicopter. To address accuracy and efficiency in blade dimension detection and overcome difficulties in the passive vision measurement method, which includes small range and unstable results due to change in blind spot location, a sensors frame fixed with 6 cameras and 2 fan-shaped lasers are designed and implemented, a blade pose-following section scanning method is developed, a linear sliding platform is used to control the position of the sensor group in the horizon, while an industrial robotic arm controlled the pose of the sensors frame at that position. A calibration board and profile registration algorithm are employed for data calibration and fusion during the measurement process. The sensors follows the blade’s twist smoothly and capture image synchronized. Processing includes edge extraction, profile fragment measurement, profile registration, and blade section profile calculation are used to obtain the blade dimension. Theoretical analysis and experimental results indicate that, the blade dimension measurement method combines sensors frame pose-following and profile registration methods, is not only easy to implement, but also with high accuracy, high measurement efficiency, and good repeatability. It eliminates imaging deviations and measurement errors caused by blade twist angle. For blades with a length within 20 meters, width within 600 mm, and twist angle within 20 degrees, the measurement system achieves thickness measurement accuracy of 0.07 mm, width measurement accuracy of 0.05 mm, and blade twist measurement accuracy of 0.1 degree. The measurement cycle for all parameters is within 300 seconds, making it highly practical.
Study on Multilevel Converter Main Circuit Topology Analysis and Modulation Simulation
Authors: Lv Fei , Wang Mian , Zhao Fenggang
Published: October 2023

With the development of power electronics, larger capacity is required. Multilevel inverter technology has been widely applied in high power equipment due to its advantages, including low voltage stress on power switches, low harmonics and EMI. However, when number of level increases, the multilevel topology and control method will be complicated, which will decrease the inverter’s reliability. High capacity is the main development direction of power electronics technology in the future, multilevel converter technology is the key to realize high voltage high capacity, and the main circuit topology of multilevel conversion device is the focus of research. Multilevel converter technology becomes the key to realize high voltage and large capacity. With the increase of level number, the complexity of circuit topology and control increases, which reduces the reliability of the converter system.The article analyzes in detail several specific main circuit topology structures of multilevel conversion devices, points out the advantages and disadvantages of several topologies, analyzes and studies the reliability of cascaded multilevel conversion devices, and carries out Carrier Phase Shift Pulse Width Modulation(CPSPWM)Simulation analysis.
Control of Ammonium Bisulfate as a Byproduct of SCR Denitration in Coal-Fired Power Plants
Authors: Deng Yue
Published: October 2023

After the ultra-low emission transformation, in order to reduce the NOx concentration at the SCR outlet, the amount of ammonia escaping from the SCR system of the coal-fired power plant increases, and the escaping ammonia will react with the SO3 in the flue gas to generate Ammonium bisulfate with strong viscosity under certain temperature conditions. Currently, it is well known that the negative effect of ammonium bisulfate from coal-fired power plants brings. Coal-fired power plant focus on how to control the generation of Ammonium bisulfate to reduce adverse effects. To effectively alleviate the denitration of Ammonium bisulfate deposition caused air preheater of formation and congestion, needs to understand Ammonium bisulfate physical and chemical properties, providing the basis for Ammonium bisulfate control. In this paper, from the source of Ammonium bisulfate, expounds the harm of Ammonium bisulfate, the regulation scheme for seeking Ammonium bisulfate, has certain guiding significance to the problem that catalyst activity decrease and air preheater congestion in today’s coal-fired power plants.
IoT-Driven Sophisticated Robot Leveraging RFID Identification
Authors: Anik Abdullah All Mamun , Moon Mosammat Sadia Akter
Published: October 2023

RFID is commonly applied to autonomously recognize motorists and cars for gateway authentication. The potential to authorize or refuse admittance depending on a vehicle’s RFID identification number is an advantageous way in offering a higher quality of protection to a territory or structure. These precautions discourage unwanted transportation from using parking spaces and prohibit anyone from approaching a safe premises or property. RFID (Radio Frequency Identification) is thus ideal technology for safeguard automobile operations that involve exceptionally safe transportation entry at transportation hubs, maritime ports, and underground mines. It’s also useful for quick and easy transport entry into garages, secured neighborhoods, employee parking spots and workplaces. With an IoT driven system, RFID technology will contribute a revolutionary change in the identification, control, communication, automation and surveillance system. In this research, we present an IOT-based transportation authentication mechanism using RFID signals. As a consequence, its counterpart identification, which currently occurs independently, could get transformed into mechanization. This procedure is going to be streamlined by the suggested system. The current accreditation procedure employs inductive chains installed in vehicles that retrieve the appropriate identity when they travel by means of the magnetism cycle.
Research on Laser Cladding Brake Disc Based on Formula Student Electric China
Authors: An Zhiyu , Zhang Tingting
Published: October 2023

In the Formula Student Electric China, the cars need to complete the prescribed complex actions such as pile winding, avoiding overtaking and so on. The braking test in the event requires the car not to run off when all four wheels are locked at the same time, which puts high demands on the braking performance and stability of the car. The design of the race car indicates that the car must have excellent performance in acceleration, braking and handling, and at the same time must have enough durability to successfully complete all the items mentioned in the rules and carried out at the race site. The endurance test is an important test of the car’s durability and reliability, with a score of 300 points, accounting for 30% of the total race score. The endurance course is approximately 22 kilometers (13.66 miles) long and requires very high performance of the brake discs. Many drivers have also reported that the brakes become soft and the braking effect cannot meet the expectation in the endurance race. Therefore, new technologies need to be tried to solve this problem. In this project, we try to apply high hardness and wear-resistant coating to brake discs by laser melting technology to improve the performance of brake discs, and find the suitable material through simulation and experiment to improve the overall braking performance of formula cars. This research has some guiding significance for the braking system of Formula Student Racing.
Study on Stress Prediction Method of Explosion-Proof Electric Heater in Nuclear Power Plant
Authors: Chen Yiwei , Zhou Qiuhong , Wang Yan , Wei Dong , Li Haitao
Published: October 2023

The seismic performance of a nuclear safety grade Electric heater is analyzed based on the workbench software. The stress load application method of explosion-proof electric heater in nuclear power plant under shutdown earthquake is proposed, the natural frequency and the stress analysis under Safe Shutdown Earthquake load is carried out. The overall and connecting bolt stress evaluation of air duct explosion-proof electric heater shall be carried out according to relevant sections of ASME and Nb standards. The article applies dynamic and static methods to analyze the stress of electric heaters, the results show that the stress distribution does not exceed the stress limit value that the Electric heater can bear, that is to say, the designed Electric heater meets the design specifications and meets the working conditions. The results of this paper provide a reference for the seismic analysis and further structural optimization design of the nuclear safety electric heater.
Water Floating Garbage Detection Algorithm Based on Improved YOLOv7-Tiny
Authors: Du Xuan , Xie Zihao
Published: October 2023

This paper presents a SC-YOLOv7_tiny model based on YOLOv7-tiny, combined with a UAV platform to detect floating garbage in water areas, addressing the low efficiency and high cost of traditional water area floating garbage detection. Firstly, a skip connection-based feature pyramid network (SCFPN) is introduced to detect small objects by combining features of different scales. Secondly, to improve the CIOU loss function, the weight of the angle penalty term θ is used to penalize differences in length and width scales, thus mitigating the problems of feature distribution imbalance, scale mismatch, and difficulty in detecting small objects when combined with the SCFPN feature pyramid. Finally, the SimAM attention mechanism is introduced into the SCFPN feature pyramid module to facilitate the model’s understanding of contextual information and enhance its feature expression capabilities. To verify the effectiveness of the algorithm, this paper uses a public dataset on Universe for testing. Experimental results show that the parameters of the SC-YOLOv7-tiny model are significantly reduced while detection accuracy is improved.
Computer Simulation and Implementation of Stiff DC Input Voltages of Cascaded Multilevel Inverter from Single-Phase Grid Supply
Authors: Eya Candidus U. , Diyoke Gerald C. , Nathan Nwokocha , Collins Okabuonye C.
Published: October 2023

Computer simulation and implementation of stiff dc input voltages for cascaded multilevel DC-AC inverters is presented in this paper. The anticipated research system is expected to trim down the problems of input voltage variations under overvoltage conditions in cascaded multilevel DC-AC power inverters as a result of load voltage instabilities utilizing rectified DC supply from utility supply. It is realized with the help of single-phase AC voltage supply, uncontrolled power diodes, filters, transformers and relayed-regulated logic system. It is different from the usual uncontrolled AC-DC Converter due to its relayed regulated scheme. The relayed-controlled system ensures an extreme voltage protection in the systems. The proposed research system has the following qualities: (i) it is efficient in operation. (ii) it a robust system (iii) the secondary part of the system is isolated from the supply with the aid of transformer. The following results were realized: stiff DC voltage of 72.0V across the input terminals of the cascaded inverter, THD of 4.91% that is within the IEEE standard and rectified voltage frequency of 100 Hz. This research work can find applications in medium scale industries, wind power stations, inverter-based motor drives and research institution, DC-powered transmission network and in battery charging stations
Underwater Image Enhancement Algorithm Based on UWGAN and U-Net
Authors: Yin Xinyan , Chen Xiwei , Yang Yihang , Liu Ying , Bi Lei
Published: October 2023

The underwater environment presents unique characteristics that often result in defects like low contrast and blurred edges. To address these issues and improve underwater target recognition for vehicles, a new method that combines UWMAN and U-Net algorithms has been developed. One key advantage of this algorithm is its ability to counteract the impact of underwater environmental factors. It achieves this by enhancing the color of the images and improving various details, leading to higher scores in evaluations of underwater color image quality and overall image quality. This means that the algorithm effectively enhances the clarity and visual appeal of underwater images. Additionally, the enhanced images obtained through this method demonstrate improved matching effects in feature point matching experiments. This indicates that the algorithm enhances the identification and alignment of crucial features within the images, resulting in more accurate target recognition. These capabilities are vital for underwater vehicles operating in challenging underwater environments. Overall, the combination of UWMAN and U-Net algorithms represents a significant advancement in enhancing image clarity and improving the accuracy of underwater target recognition. The algorithm’s ability to mitigate the impact of underwater environmental factors and produce visually pleasing images holds great potential for various applications related to underwater exploration, marine research, and inspection tasks beneath the water’s surface.
Simulation Analysis of Sound Field Characteristics of Spacecraft Cabin Leakage in Orbit Under Multi-Working Conditions
Authors: Sun Wei , Li Zheng , Wang Lina , Ren Guohua , Sun Lichen , Jiang Lixiang , Yan Rongxin , Sun Jipeng
Published: October 2023

For manned on-orbit space station system, leakage will reduce the air pressure in the cabin, and seriously endanger the astronauts life safety, so it is urgent to locate the leakage hole quickly. Based on this, this paper establishes a simulation model of leakage flow field and sound field, and analyzes the influence of leakage hole diameter on the characteristics of leakage sound field under the condition of atmospheric leakage to vacuum. The results show that with the increase of hole diameter, the leakage velocity field and the maximum turbulent kinetic energy will increase, but the maximum turbulent dissipation will decrease, and the fluid velocity at the outlet of smooth hole is slightly higher than that of rough hole. The distribution of sound pressure level of low-voltage dipole sound source is relatively uniform. The distribution of sound pressure level of quadrupole sound source is radially outward. The research in this paper can provide technical support for subsequent leakage location.
Fair Game of Quantum Penny Flip
Authors: Yang Xiaoken , Li Wei , Huang Yongchang
Published: October 2023

The Quantum Penny Flip is a classic thought experiment in quantum mechanics that demonstrates the weird and counterintuitive nature of the quantum world. To solve the “PQ” problem, we proposed a quantum strategy selection and optimization algorithm, and designed a quantum algorithm for this problem. In terms of practical applications and Case study, this paper reviews the classic two player game – “PQ coin flipping” problem, and shows that when one of the participants adopts quantum strategies, he can defeat his classic opponent and obtain higher returns. By using quantitative methods, the entire “PQ” problem is placed under a more general and fair condition, and it is promoted and studied again from multiple aspects and perspectives. At the same time, this article provides the definitions of “incomplete fair game” and “complete fair game”, modifies the quantum coin flipping game [Meyer, Phys. Rev. lett. 82 (1999) 1052] to make the game fair, and studies the multi round versions of quantum coin flipping. We have drawn some basic conclusions about fair quantum games and explained the meaning of completely fair games in practice. We discussed the limitations and scalability of the “PQ” problem and looked forward to the future development direction of quantum game research.
Wireless Ad Hoc Network Communication Technology in the Petroleum and Petrochemical Industry Analysis of the Operation Site Application
Authors: Mei Yunyi , Zhao Tong , Gao Qingzhong , Yang Xinyi , Zhang Yanlong , Jing Lingzhi , Yan Hui
Published: October 2023

In recent years, with the continuous development of satellite, 5G and wireless Ad Hoc network technology, the multi-party combined satellite Ad Hoc network, as an important component of the air Ad Hoc network technology, has shown a wide application value in the remote areas of petroleum and petrochemical operation site. This paper analyzes the characteristics and deficiencies of existing well site surface communication technologies, For a series of problems, such as difficult construction of fixed infrastructure on drilling ground, poor wide area extension of communication technology and insufficient network bandwidth connection. Especially the industry challenges of regional data transmission facing the well field environment, using the technical characteristics and application advantages of wireless Ad Hoc network and aerial Ad Hoc network of satellite mobile communication system. Combined with the performance improvement requirements of well site equipment interconnection and the industry regulatory requirements for safety standardization, the design scheme of high speed and high bandwidth Ad Hoc network communication network. Built the operation site integrated network security large-capacity transmission technology system. Effectively expand the application advantages of satellite mobile communication, it provides technical support for the safety production and technical support in the deep and remote operation site, It effectively promotes the construction of the intelligent operation site.
Liquid Boriding for Small Cutting Tools
Authors: Long Nguyen Nhut Phi , Nga Pham Thi Hong , Thuc Nguyen Van , San Tran The , Hung Ho Sy , Nhan Nguyen Khac
Published: October 2023

In steel surface hardening methods, Boriding produces a layer of uniform hardness from the surface to a depth of the diffusion layer, with high resistance to wear and corrosion. This method can be applied to carbon steels, low alloy steels, tool steels, stainless steels, etc. Specifically for parts subject to high levels of wear, such as valve parts (gates, body/stem, etc.), pump components (housings, cylinders, etc.), agriculture equipment (harvesting cut tools, separators, etc.), and automotive parts (engine oil pumps, gears, etc.). This study focuses on studying the formation mechanism of permeable layer Boriding, the nature of absorbent layer B forming on the steel surface, and exploring the influence of factors such as infiltration temperature, infiltration time, and mixture ratio on the microstructure, properties of the permeability layer Boriding. The salt bath consists of 70% borax + 30% silicon carbide, and the permeability temperature is from 850°C to 1050°C for about 2–10 hours. The results show that the penetration rate is relatively fast, about 0.04 mm/h, and the quality of the layer is relatively uniform. After Boriding, quenching, and tempering, the hardness obtained about 1000–1100 HV.
Wind Energy Conservation of Global Trade Routes Based on Oil Tankers
Authors: Jiang Baoshen , Huang Lianzhong , Ma Ranqi , Wang Kai
Published: October 2023

Sail-assisted Ship is an effective way to use wind energy to improve the green level of ships. The distribution characteristics of offshore wind resources are very important for sail-assisted ships, but there is still no effective energy-saving evaluation method to evaluate its utilization rate. This paper calculates the energy saving effect on the main trade routes based on wind resource analysis. Taking the large oil tanker with wing sail as the research object, the ocean wind resources in the sea area of the world’s main trade routes are analysed by spatiotemporal interpolation method. Wind resource information on trade routes was obtained, a model was built based on wind field probability matrix and thrust load matrix during full load sailing, and the wing sail energy saving effect was calculated. Based on this model, the annual energy saving effect of large oil tankers on main routes was analysed. Finally, combined with the actual sailing condition of the ship, the energy saving evaluation method of the sail aid ship on the typical route is proposed .The conclusion shows that if the popularization and application of sail aid technology can improve the energy efficiency of ships, it is of great significance to the green level of shipping industry.
The Effect of Center Diaphragm Excavation Method and Auxiliary Construction on Surface Settlement of Shallow-Buried Tunnels
Authors: Guo Xinyi , Tang Hao , Zeng Ji , Zhang Hui
Published: October 2023

Previous works have shown that for the excavation of underpasses, the selection of appropriate excavation and construction methods has a significant impact on the surface settlement. The result of research showed that shallow tunnelling method usually has the characteristics of large investment scale, long time limit, complex and diverse construction technology, and great mutual influence of surrounding environment. Therefore, this project adopted CD method for initial excavation, and adopted the full-section overburden grouting method for the later stage to limit the surface settlement. The results showed that the surface settlement caused by hole1 and 3 accounted for 65.9 % of the total surface settlement, while the surface settlement caused by hole1 3 and 4 was 22.4% and 2.5%, respectively. After using the full-section overburden grouting method. At the corresponding excavation stage, the surface settlement caused by the new process was obviously lower than that of the old process. Among them, during the excavation of hole 1, the surface settlement value was reduced by 15.47% compared with the old process, indicating that the use of the new process can greatly reduce the surface settlement value and improve the engineering quality of the underground tunnel.
Effect of Polyethylene Terephthalate, Rubber, and Glass Based on Concrete Properties
Authors: Khatib Milad , Ahmad Raghd Haidar , Arairo Wahib
Published: October 2023

Given the significance of the environmental component, the concept is to combine the disposal of solid waste with acceptable structural design by incorporating those wastes into the design. The major objective is to turn garbage materials into useful ones in structural designs, which will allow us to design a structural element while considering the environmental aspect. This project aims is to investigate the effect of adding PET flakes, rubber, and glass will affect the concrete cylinders’ compressive strength, tensile strength, and resistivity. With increasing percentages of used waste materials and replacing fine and coarse aggregates (sand and gravel) in concrete, our project tackles the environmental aspect of our job. Crush tests are performed to monitor the impact of these waste materials on the concrete’s compressive strength, tensile strength, and resistivity to determine the appropriate amount to be added, and compare the obtained results with each other’s.
Research on Maturity Assessment Method for Digital Mock-Up of Large Ship
Authors: Li Fei , Li Sheng , Yang Di , Pan Weibo , Sun Yuhang , He Chuyao
Published: October 2023

The traditional serial working mode is no longer adopted for development of modern large ship products, instead, remote collaborative design with the support of parallel engineering is carried out, and the full three-dimensional design and modular construction of the total section provide powerful tools and means for ship development in this way. In order to effectively control the parallel collaborative development process of large ships combined with the characteristics of full three-dimensional design and modular construction of large ships, and in view of the lack of detailed evaluation of design status control compared with maturity, and mismatch with the modular construction mode of the total section, a digital mock-up maturity assessment method is proposed. Through the valuation calculation method and key process domain method, a more accurate and reasonable digital mock-up maturity value is defined, and a four-level digital mock-up maturity assessment system covering equipment, region, total section and product is established, and a control method for maturity changes is proposed. This maturity assessment can realize third-party evaluation and review, and the management unit and the modular construction mode of the total section are closely matched, which can support the construction enterprises to carry out corresponding production design, process design and construction according to different maturity digital mock-ups, improve the parallelism of design and construction and development efficiency.
Software Security Analysis for Automotive Intelligent Cockpits
Authors: Yu Longhai , Bian Xudong , Ning Yuqiao , Guo Zhen
Published: October 2023

With the development of software technology in the automotive industry, open-source components are increasingly penetrating into the automotive systems. Researching the security of open-source software is an important topic in automotive software security. In this paper, the OTA update package of In-Vehicle Infotainment components in intelligent cockpits is analyzed to obtain the internal file system and summarize the general structure of the automotive IVI component file system and the functionality corresponding to common file paths. By analyzing the linking information of executable files in the firmware package, the dynamic linking library information of the executable files is collected to expand the coverage of components and prevent the omission of third-party components. Subsequently, the Software Composition Analysis technique is used to identify the most frequently used third-party components in the sample firmware. The results are validated by comparing the function call relationships between the sample files and the source code of the third-party components through reverse engineering analysis. Static analysis methods and patch comparison techniques are combined to verify the presence of Common Vulnerabilities and Exposures vulnerabilities in the identified third-party components. Finally, based on the experimental results, relevant recommendations are provided for the security of intelligent cockpit software.
Study on the Application of Fenton-Like Process via Dual Membrane System for Reusing Desulfurization Wastewater
Authors: Cao Hongmei , Pang Li , Wu Zhongjie , Lv Baoqing , Li Yan , Wei Yujing , Wang Wei
Published: October 2023

In order to meet the requirements of environmental protection policy, the construction of zero discharge projects is carried out for desulfurization wastewater, of which the concentration and reduction process is the key of this project. To remit the poor operational stability of the dual membrane system for the concentration process of desulfurization wastewater, a heterogeneous Fenton-like treatment process was used for the desulfurization wastewater after softening-coagulation clarification in Yunhe Power Plant. Moreover, the type and amount of catalysts for the Fenton-like treatment were optimized, and the stability of this process was investigated. Compared with those of the concentration and reduction process without the heterogeneous Fenton-like process, the operating pressure of the dual membrane system is reduced, and the operational stability was significantly improved. Notably, 40% of the desulfurization wastewater can be recovered. These results indicate that the heterogeneous Fenton-like treatment can deeply separate the pollutants in the desulfurization wastewater, and the catalyst properties in the heterogeneous Fenton-like process are stable, which will not induce secondary contamination due to catalyst deactivation.
Development and Research of the Method of Static Systems Identification by Hysteresis
Authors: Khudayarov B.A. , Komilova K.M. , Ruzmetov K.Sh. , Yuldashev N.N. , Yusupov E. , Turaev F.
Published: October 2023

The paper considers methods for constructing and numerical realization of a hysteresis model for engineering systems. Mathematical models based on the analytical representation of the hysteresis characteristics of linear systems obtained by specifying piecewise linear signals at their input with different velocities of both signs on linear sections are proposed. For a more accurate description of the hysteresis characteristics of static systems that actually occur in practice, in a number of cases, differential equations of higher order are used, in particular, equations of the second order. The use of differential equations of higher order makes it possible to simulate cyclically unstable hysteresis, when the shape and slope of the hysteresis curves can change from a cycle to a number of cycles. For some systems, this process ends after a certain number of cycles (there is a so-called transient process in the phenomenon of hysteresis, in electrical engineering, it is called accommodation in relation to magnetic elements), for other systems this process of cyclic instability of hysteresis can be observed for any length of time. Methods for identifying static objects by hysteresis were developed and investigated.
Construction Technology of Pre-Support Structure of Subway Tunnel Under New Building
Authors: Sun Xianjun
Published: October 2023

Based on a project in Lanzhou City, in view of the limitations of traditional construction technology, combined with the actual project, the innovative use of “subway tunnel supporting pile + steel reinforced concrete column, beam and slab structure overall installation technology” has solved the problem of internal force loss of the pre-support steel structure, the problem of concrete cutting, pouring and pile quality when the subway tunnel supporting pile has a large pile distance and is constructed at both ends at the same time. Finally, the mechanical performance, overall performance, stability and other technical indicators of the whole supporting system meet the requirements. It not only ensures the stability of the foundation of the new building, but also provides advance support for the excavation of the subway line 4 tunnel in the future. The technology is mature, the method is reasonable, the measure is effective, after each technical examination and Recheck, the settlement of subsequent building construction is stable, the support system achieves the design each target request.
A Number-Theoretic Proof of the Solvability of Polynomials
Authors: Nawaz Shahid
Published: October 2023

In this paper, we prove the solvability of polynomials based on partition function in number theory. Let \(p(n)\) be the partition function, where \(n\) is the degree of a polynomial. We prove that a polynomial is solvable by radicals if \(p(n)\leq n+1\).
Influencing variables of health: dimensions and their determinants – A systematic review
Authors: Kaiser Daniel , Schuhmacher Adrian , Bös Klaus
Published: October 2023

BACKGROUND: The aim of this systematic review is to identify all determinants and influencing factors to quantify health as holistically as possible using a multilevel model. The model is derived from determinants, influencing factors and variables of found health measurement constructs. Thus, the quantifiability of health in the model can be ensured.

METHODS: The present systematic review is based on the items of the PRISMA guidelines and thus corresponds to the valid guidelines of a systematic review. Literature searches were conducted in English (PubMed, Scopus, Web of Sciences) and German databases (BISp-Surf). All instruments that measured health within one of the five identified dimensions of health (mental, physical, social, existential, environmental) were included. The scores were rated with a quality appraisal tool. All scores were incorporated into a newly created multilevel health model to show health as holistically as possible with all important determinants, influencing factors and variables.

RESULTS: In total, 47 instruments distributed over five dimensions of health were found through the systematic literature search. Of these, 19 instruments were rated as "weak", 19 as "medium" and six as "strong". The review offers good comparability because most instruments were questionnaires.

CONCLUSION: A multilevel health model based on health measurement instruments was created. This model offers a simple and clear holistic representation of relevant determinants and influencing factors of health. In the future, the model can be used as a basis for the creation of a multidimensional health score that can evaluate people’s individual health.
Is art education marginalized at Indian institutes of higher learning?
Authors: Bandyopadhyay Nachiketa , Patra Swapan Kumar
Published: October 2023

This paper will investigate the history of art education in India as well as its current state of development. Art in the Indian Subcontinent has a long history with diverse and rich cultural expression. Indian art continues to develop with modern influences while maintaining its traditional roots, acting as a tribute to the nation's rich cultural past. Modern Indian art is more than a century old. Along with other disciplines, the art education in modern India has inherited the colonial legacy. After the independence, government of India has accepted the need for a holistic approach for modern art education among the Indian students. The government has taken several initiatives including various policies and programmes. However, with all these initiatives the art education is still a neglected discipline. The All India Survey on Higher Education (AISHE) reports indicate that a potentially uninspiring number of students enrollment in various arts education programs. Recently the government has adopted ‘New Education policy 2020’ with special emphasis on the art education by revamping the overall structure from the top to the bottom level. On the other hand, the NEP and its implementation could lead to a big shift in the educational landscape. All stakeholders must increase their financial, logistical, and scholarly obligations for it to be carried out.
A Grounded Theory Exploration of Air Taxis in Florida
Authors: De Moraes Campello Thais
Published: October 2023

This study investigates Floridians’ perspectives on an emerging mode of transportation: air taxis, technically known as e-VTOL (electric vertical take-off and landing). This qualitative study aimed to identify the primary motivations for fostering acceptance and adoption by the general public. Three significant themes and seven sub-themes were identified through a grounded theory exploration of 13 in-depth interviews. The main themes encompass trust, a sense of agency, and the prolongment of excitement. Initial findings indicate that trust needs to be gained from the public through education, a guarantee of safety, and credible communication to generate acceptance of this new technology. However, findings suggest that Floridians view air taxis as a one-time entertainment, which does not guarantee adoption. Prolonging excitement and making passengers feel a sense of agency over their lives and time indicates that it will lead to adoption. The findings suggest a communication strategy to promote e-VTOL should be based on the three themes to ensure acceptance and adoption. Florida's future mobility plans can benefit from this qualitative research to re-imagine future cities, as few studies have assessed or investigated public motivations around this innovation.
Access to Adequate Reproductive Care in Florida’s Women’s Prisons and Jails
Authors: Dickens Jordan
Published: October 2023

Mass incarceration is a pervasive issue in the United States, with women, particularly women of color, becoming the fastest growing population in prisons. Despite this, many carceral institutions lack the infrastructure to provide incarcerated women with adequate reproductive healthcare, and states often lack policy providing for adequate reproductive care. This paper examines the women’s prisons and jails of Florida, serving as both an analysis of the care offered to prisoners and the policies that have been passed in the state legislature. Additionally, it examines the potential impacts of the Supreme Court’s 2022 decision to overturn Roe v. Wade, and Florida’s subsequent legislation restricting abortion access. Through this analysis, this paper finds that more protections are needed at both the state and the institutional level for reproductive healthcare in Florida’s women’s prisons and jails, particularly after the overturning of Roe v. Wade.