bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of structural size on mechanical properties of nitinol left atrial appendage occluder
Authors: Zhao S. , Li H. , Guo P , Li C. , Kong Y. , Song Y. , Guo L. 
Published: May 2022

Abstract
Left atrial appendage occlusion is one of the effective measures to prevent left atrial appendage thrombosis and reduce embolism. The structural size of left atrial appendage occluder has an important influence on its mechanical properties and may further affect its effectiveness. In this paper, the diameter shrinkage of nitinol left atrial appendage occluder with different structural sizes under different forces was studied by finite element simulation to evaluate their mechanical properties. It was found that the diameter shrinkage of left atrial appendage occluder of different structural sizes raised with the increase of the applied force. Reducing the width of the auxiliary support part of left atrial appendage occluder could improve the overall flexibility of left atrial appendage occluder although the rigidity of the main support part was slightly reduced. In addition, when the shrinkage rate of the main supporting part was the same, the flexibility of the auxiliary support part was improved. The results may provide a theoretical reference for improving the design of left atrial appendage occluder.
Experimental study of AA5052-H32 al alloy in single point incremental forming process, SPIF
Authors: Bhandari Krishna Singh , jung Dong won 
Published: May 2022

Abstract
Forming a sheet in a normal room temperature is a famous method of reshaping a metal. To avoid the fracture, proper selection of a metal, sheet thickness and purity of metal are considered. So, research considering the parameters along with spring back are discussed throughout the paper. A 0.5mm thickness sheet is being formed by using Single point incremental forming process, which is also known as SPIF. From SPIF a 0.5mm sheet is formed in three degree. I.e., 30°, 60°, and 90° as in fig 1. The experiment was performed to evaluate the maximum height of 0.5mm sheet to improve formability. For this, the use of lubrication, grease and oil were mixture and applied in a sheet. Overall, the present of spring back is observed and reduced in a sheet while applying mixed lubrication. While forming a sheet, the thinning behaviour in is witnessed with the smooth surface of a metal sheet.
Study on quality of low alloy high strength steel Q345 weldment
Authors: Hu Min 
Published: May 2022

Abstract
In this paper, the temperature, microstructure, residual stress and welding deformation of typical welded joints of low alloy high strength steel are calculated by using the finite element software SYSWELD. The temperature, microstructure and residual stress of Q345 low alloy high strength steel welded joint by single pass remelting and two pass remelting were numerically simulated, and the accuracy of the finite element model was verified by experiments. The numerical simulation results based on Satoh model show that the formation process and evolution mechanism of residual stress in Q345 steel at different hot temperatures. The single pass remelting weld of Q345 steel is mainly bainite with an average hardness of 310hv. The microstructure of HAZ consists of bainite, ferrite, pearlite and a small amount of martensite. With the increase of fusion line distance, the hardness of the base metal decreases. The microstructure of the base metal is ferrite and pearlite, and the average hardness is 167hv.
Study on tribological properties of epoxy resin composites
Authors: Cao Jinling , Luo Ying 
Published: May 2022

Abstract
Epoxy resin has been widely used in many fields. The improvement of friction and wear property can further expand the application range of epoxy resin. Filling modification can improve the tribological state of epoxy resin and improve the friction and wear property of epoxy resin. This paper summarizes the research of epoxy resin composite material tribology performance at the forefront of progress. The influence of different fillers on the friction and wear properties of epoxy resin composite materials was discussed from the aspects of the single filling of nano-filler, organic materials and inorganic lubricating fillers and the compound filling of inorganic or organic-inorganic fiber-filler. Many researching literature shows. The mechanical properties of epoxy resin composites are strengthened by adding filler to epoxy resin to improve the load bearing capacity of epoxy resin composites during friction. At the same time, add filler to reduce the surface of epoxy resin and the friction pair of duality between the caking property, and in the process of friction is easy to form transfer film, transfer film to isolate the direct contact of the friction surface, composite materials and the dual friction between surfaces into composite materials and transfer film, the friction between improved tribological condition between the friction pair, reduce the friction coefficient and wear rate of epoxy resin composites multiple fillers can improve the wear resistance and reduce the friction coefficient of epoxy resin composites, so that the epoxy resin composites have better tribological properties.
Detection method for surface scratches of composite automotive components with high reflection and complicated background color
Authors: Peng Yanlong , Tian Dazhuang , Ma Binxuan , Tian Linli 
Published: May 2022

Abstract
Current testing status have the problems that the surface background color pattern of high reflective carbon fiber auto parts is complex, the shape of scratch defects is irregular, and the shallow and micro scratches are not easy to be detected. Aiming at the problems, a scratch detection method combining innovative morphological processing and optimized Canny edge detection algorithm is proposed. The image acquired by an innovative image acquisition platform. After gray processing and open operation denoising, the self-defined oval kernel secondary expansion is introduced in the morphological processing part. When threshold segmentation and minimum connected domain screening are done, the optimized Canny edge detection algorithm is used. Through the non-maximum suppression of gradient amplitude, a wide range of dual-threshold parameters are selected to detect the edge of the target image. The results show that the detection rate of the proposed method is 18.57% higher than that of the traditional way, and the detection rate is up to 95.71%. At the same time, the proposed method can reflect the scratch morphology more intuitively.
Effect of silica modified by silane coupling agent on properties of epoxy resin composites
Authors: Jie Qu , Li Yuanyuan , Lv Guanglei , Jiang Xiaobin , Yuan Shinin 
Published: May 2022

Abstract
Silica was modified by silane coupling agent, and then the modified silica was added to epoxy resin to prepare the composite. The modified silica / epoxy composites were characterized by scanning electron microscope, mechanical property test and contact angle test, and the effects of different silica dosage on the properties of the composites were studied. The results show that the mechanical properties of the composites can be greatly improved after the composite of modified silica and epoxy resin, and the optimum addition amount is 5%.
Comparison of cavitation erosion behavior of 45 steel and 0Cr18Ni9Ti stainless steel
Authors: Yao Zhihua , Zhang Chunyan , Li Shaoling 
Published: May 2022

Abstract
A cavitation erosion test of 0Cr18Ni9Ti stainless steel and 45 steel sample was performed in an ultrasonic vibration apparatus. The cavitation erosion behavior was studied by means of metallographic microscope, Vickers hardness test, scanning electron microscopy and mass loss analysis. The results showed that the surface hardness had an obvious influence on cavitation erosion, the higher the hardness, the better the cavitation erosion resistance was. Plastic deformation and fatigue fracture were the main mechanics of cavitation erosion of 0Cr18Ni9Ti stainless steel, whereas cavitation erosion of 45 steel was accompanied by oxidation, which will intensify cavitation erosion. Reasonable surface modification technology should be adopted for 0Cr18Ni9Ti stainless steel to improve surface hardness, and suitable surface protection technology must be used to resist cavitation erosion and oxidation for 45 steel under cavitation conditions.
Design of an environmentally friendly leather-like fabric based on thermoplastic polyurethane covered yarn
Authors: Wang Yang , Li Zhe , Cao Yang 
Published: May 2022

Abstract
By means of knitting and weaving, the new yarn was woven into a new eco-friendly leatherette. A series of research methods and data are summarized through the optimization and improvement of the design process and the heat-setting treatment of the fabric after weaving, which will bring a breakthrough in the reform of the preparation, research and development of new environmentally-friendly materials and product application. The new environmentally-friendly imitation leather fabrics is superior to similar products and boasts advantages in product application, such fabric is comfortable, breathable, waterproof, windproof, folding-resistant, wear-resisting and biodegradable. The cost of its production is much lower than expensive leather products, in the meantime, the space for design and development in the aspect of fabric texture, pattern, and color can be expanded more compared with other leather and imitation leather products.
Design and analysis of independent 3-link rear suspension for All-Terrain vehicle
Authors: Patel Pavan , Shah Vyom , Keshav Manjeet 
Published: May 2022

Abstract
The fundamental thought behind the paper is to configure, dissect just as recreate the Independent 3-Link suspension math introduced in the back of an Off-road Vehicle (ATV). An ATV as the name recommends is intended to handle a tremendous assortment of landscape than different vehicles. The Suspension framework which is the main imperative for taking care of has gone through a generous measure of advancement previously. Accordingly, the point is centred around planning the previously mentioned suspension framework joining elements of the vehicle with giving ideal execution of the vehicle while expanding driver comfort. Boundaries like camber, wheel travel, roll focus were assessed to achieve the wanted execution. As the ATV’s for the most part go through a colossal measure of shocks in harsh landscapes, the soundness of the vehicle was additionally given significance. by arms in CAD software.
Modeling and analysis of integrated wheel hub
Authors: Shah Vyom , Patel Pavan , Keshav Manjeet 
Published: May 2022

Abstract
The main objective of the hub is to act as a support structure to the entire wheel assembly of the vehicle. It is designed to absorb and dissipate the kinetic energy from the impact on the tire. This paper discusses an idea for optimizing the wheel assembly by redesigning, validating the design through analysis, material selection and overall weight reduction. The design optimization is done while taking in consideration of the design constraints, factor of safety (FOS) and manufacturability through conventional means. Weight reduction in the wheel assembly will help improve the suspension performance. The research is based on integrating parts of the wheel assembly for weight reduction, performance optimization and ease of assembly. The proposed design of wheel flange will be followed by material selection for attaining an adequate FOS and wear strength.
Guidance method of simulating weld trajectory between planes based on single-point laser
Authors: Chen Min , Ma Zhiling , Chen Li , Chen Junhong , Liu Yaohui 
Published: May 2022

Abstract
In the face of problems such as welding of small objects or too small welding space, an application method of welding small plane intersecting objects based on point laser was proposed. The demonstration points pointing to different planes were preset, and the laser displacement sensor was driven to measure the physical value by simulating the sharp workpiece of the welding gun. Multiple projections at different locations were made on a certain plane of the welding object, so as to ensure that the laser points were not collinear and obtain the laser point parameter set. The plane equation was solved respectively according to the planes pointed by different demonstration points, and a geometric model was built. The equation of the intersecting line between the planes in the welding object was calculated. The points on the line were obtained as the welding start points. The workpiece tip was controlled to move along the intersection direction by the mechanical arm, so as to achieve the weld effect.
Forklift with small turning radius and its efficiency
Authors: Amon Berdiev , Dong Zhang , Gayrat Bahadirov , Xuelin Wang , Qian Li 
Published: May 2022

Abstract
A forklift is one of the most widely used vehicles in industry sectors in few decades. Therefore, it is important to create or improve their entire designs. This article proposes a method for determining the required corridor width by calculating the turning radius of standard counterweight Forklift and the new construction of forklift and compares their parameters. The effect of the new type of fork on the efficiency of forklifts and warehouses was studied.
Study on the influence of restraint stiffness of main material on the compression stability bearing capacity of cross-bracing in transmission tower
Authors: Li Jiayao , Li Zhengliang , Huang Xing , Liu Hongjun , Wang Wenwu 
Published: May 2022

Abstract
In order to study the influence of restraint stiffness of main material on the compression stability bearing capacity of cross-bracing in transmission tower, in this paper, the load of cross-bracing under eccentric compression in transmission tower is simulated. The load test of 45 Q355 equilateral angle steel cross-bracing specimens with typical sections is completed, and an effective ANSYS finite element model is established for analysis. The effects of the restraint stiffness of main materials, slenderness ratio, material strength and the number of connecting bolts on the bearing capacity of cross-bracing are discussed, and the relevant laws are obtained, which provides a reference for engineering application.
Research and Application on Cooperative Positioning Technology in Substation Project based on BDS and UWB
Authors: Zhang Chengwei , Zhang Na , Chen Bingqian 
Published: May 2022

Abstract
This article mainly discovers and studies a cooperative positioning technology which combines Beidou Navigation Satellite System (BDS) and Ultra Wide Band (UWB) technology. BDS is mainly used for precise positioning in outdoor environments, and UWB technology can be widely used for positioning in both indoor and outdoor environments. This article firstly proposes a combined positioning technology based on BDS and UWB positioning technology, and proposes appropriate technical schemes and solutions for outdoor, indoor and indoor-outdoor transition areas. After considering the actual situation of the substation project, a coordinate conversion method that can be applied in the actual engeerning project is proposed to realize the unification of different coordinate systems and meet the needs of seamless positioning of indoor and outdoor panoramic views of the substation project. Finally, the field test results proves the effectiveness of proposed method.
Consistency-based Semi-supervised Learning Framework for Power Line Insulators Detection
Authors: Yao Xu , Lei Longwu , Zheng Zhou , Mo Wenhao , Wu Han , Li Shufang 
Published: May 2022

Abstract
It is commonly believed that fast and accurate object detection is the prerequisite for power line insulators automatic fault diagnosis. While the insulators detection task requires a huge number of labeled images to guarantee its performance, placing bounding boxes for every object in each image is time-consuming and requires professional knowledge. To alleviate this problem, we propose CASD, a two-stage semi-supervised learning framework for power line insulators detection based on consistency regularization and data augmentation. Firstly, we train a teacher model on labeled images, then generate pseudo labels for unlabeled images using the trained model, and the confidence-based thresholding is introduced to control the quality of pseudo labels. In the second stage, we apply strong data augmentation to unlabeled images and use both the labeled and unlabeled images to train the CASD. Consistency regularization is introduced in the calculation of unsupervised loss to improve the accuracy and robustness of the model. Finally, we compare CASD with supervised learning, data augmentation and self-training methods on insulators aerial image dataset. The results show that the proposed method performs better than all the three baseline methods, and the detection accuracy of CASD is far better than the supervised learning method in the case of less available images. The comparison results further prove the efficacy of the proposed method.
High Step-Up Resonant DC–DC Converter With Resonant Network for Electrical Collection Systems
Authors: Han Zhilu , Wang Guangzhu , Liu Yuhui , Guo Wenjie 
Published: May 2022

Abstract
The efficiency of renewable energy electrical collection can be effectively improved by adopting the high voltage direct current (HVDC) electrical collection method. The low-voltage DC power is stepped up to the high-voltage level for HVDC transmission by one-stage step-up type, which can reduce the cost of high-voltage large-capacity DC-DC converters. However, the high cost of DC-DC converters which can achieve high step-up ratio, such as modular multilevel converter (MMC), limits the development of the one-stage step-up type. In this paper, a low-cost DC-DC converter with high step-up ratio which can realize the bidirectional flow of energy is proposed. The total step-up ratio is the product of high-frequency transformer ratio, resonant network gain and step-up ratio of voltage doubler rectifier circuit. Meanwhile, the direct power factor control (DPFC) strategy is proposed based on the idea of controlling active power to achieve the goal of controlling output voltage. Finally, the step-up ratio of the DC-DC converter can reach 160 times, and realize zero-voltage switching (ZVS) turn-on of the switches and zero-current switching (ZCS) turn-off of the diodes.
Design and Simulation Analysis of Low-speed Tidal Current Energy Generator
Authors: Liu Wenzhou , Yang Minghao , Yao Xiaoyan , Xiao Xu , Jiang Zhihong , Zhang Xiao 
Published: May 2022

Abstract
As a kind of ocean energy, tidal energy is mainly caused by the flow of seawater accompanied by tidal phenomena. Tidal current power generation uses the rising and falling ocean currents to impinge on the impeller device of the turbine to rotate the impeller to generate electricity. Tidal current power generation has gradually attracted the attention of countries all over the world in recent decades because of its clean, strong regularity, and high energy density.This paper designs the magnetic circuit structure of a low-speed tidal current generator prototype with a rated power of 1KW, selects a suitable electromagnetic topology, initially determines the generator material and electromagnetic structure, and then uses finite element analysis software to conduct a two-dimensional simulation analysis of the generator. The results show that the current, voltage, and power of the prototype meet the design requirements, and the transient no-load and load analysis is completed. The parameters of the generator are verified to be within a reasonable range to ensure the stable operation of the generator.
Research on thermal management system of next-generation hybrid electric vehicle
Authors: Wang Jianpeng , Kong Fanming 
Published: May 2022

Abstract
New energy vehicles play a bigger role under the National VI emission standard and the double-point policy conditions, which is the focus of Original Equipment Manufacturers (OEMs) and consumers due to the advantages of low fuel consumption and long battery life. The front cabin of a hybrid electric vehicle (PHEV) includes the cooling system of the engine, electric motors, controller and condenser, etc. Compared with fuel and pure electric vehicles, the front cabin has a higher heat load, smaller space, and a great influence of the radiators for PHEV, which has more requirements for the cooling module. As people’s requirements for power and comfort continue to increase, the cost and energy consumption of thermal management systems are also rising. Hence, all OEMs have shifted their focus to developing a new generation of thermal management systems. The performance of the new-generation hybrid vehicle thermal management system can meet the performance requirements of the entire vehicle, and it has the advantages of being suitable for platformization, reducing costs, comprehensive utilization of vehicle energy to reduce energy consumption, high radiating efficiency, small front-end module size, and low fan power.
Open-circuit Fault Riding Through of Receiving AC Terminal in HVDC Transmission System for Offshore Wind Farms
Authors: Du Zhaoxin , Liu Shaojie , Wang Xingguo , Wang Shuyang , Zhao Huilong , Che Songyang , Tu Peng , Liu Han 
Published: May 2022

Abstract
Flexible high voltage direct current (HVDC) transmission system is indispensable for long-distance and high power transmission capacity in offshore wind farms. The AC open-circuit fault of the receiving terminal is quite severe, where the power transmission might be suddenly cut down to zero. As a result, a severe over-voltage will occur on the HVDC side and modular multilevel converter (MMC) submodule capacitor. In this paper, the over-voltage suppression mechanism is put forward to augment the AC open circuit fault at the sending and receiving terminal of the MMC-HVDC system. First, the formulation mechanism of DC over-voltage in the MMC-HVDC integrated wind farm is studied. Then, three different over-voltage suppression mechanisms, namely wind turbine pitch control, crowbar control, and submodule redundancy, are put forward to suppress the aforesaid over-voltage in the MMC-HVDC system. The simulations are carried out in PSCAD based on a test case, and the simulation results are used to confirm the efficiency of the proposed overvoltage suppression techniques.
Research on PMSM Sliding-mode Vector Combined Speed Controller Based on Improved Exponential Reaching Law
Authors: Wang Dongwen , Wang Dongheng , Zhou Wei , Niu Libo 
Published: May 2022

Abstract
Sliding mode control has good robustness, but the traditional sliding mode has the problem of chattering. Aiming at the conflict between velocity and chattering in the approach stage of sliding mode control, a new reaching law is put forward. By improving the isokinetic approach term of the traditional exponential reaching law, the system’s requirements in different stages of sliding mode motion are met, and this contradiction has been effectively improved. At the same time, to better improve the control effect of permanent magnet synchronous motor (PMSM) speed regulation system, combined with the traditional PI control with no static error and no overshoot, a combined speed controller combining sliding mode control and PI control is designed to enhance the robustness of the system. By building a model in Matlab/SIMULINK for simulation, the effectiveness of the improved exponential reaching law and the improvement of the system performance brought by the combined speed controller are verified respectively.