bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Influence of Rub-impact Buffer Stroke on the Dynamic Response of Two-section Rotor
Authors: Wu Tingwei , Li Shitu 
Published: August 2023

Abstract
The two-section rotor needs to go through multiple critical speeds in the process of speed increase. When the rotor approaches the critical speed, its amplitude increases rapidly, easily causing collision damage. The auxiliary over-critical device cushions and protects the rotor through rubbing, which makes it pass the critical speed under the safe amplitude. In this paper, the influence of buffer stroke, the key structural parameter of the auxiliary over-critical device, on the dynamic response of the two-section rotor at the first-order bending critical speed is analyzed, the influence of its buffer stroke on the over-critical dynamic response of the rotor is calculated and analyzed, and the impact and friction force on the rotor is calculated. The design principles and results of the buffer stroke parameters of the auxiliary supercritical device are proposed.
Design and Optimization of PMSM for Injection Molding Machine
Authors: Huang Jinlin , Cao Guanghua , Zhang Li 
Published: August 2023

Abstract
With the implementation of the “dual carbon policy”, the traditional injection molding machine transmission system pays more and more attention to improving the energy efficiency for the drive motor, and the PM motor has obvious advantages in injection molding machine drive motor because of its high efficiency and high-power density. A permanent magnet servo motor (PMSM) for an injection molding machine with a rated power of 7 kW is designed based on the theory of PMSM in this paper. The 2D finite element analysis (FEA) model of the motor is set up. The electromagnetic performance parameters are obtained, including cogging torque, torque ripple, output torque, and no-load back EMF. The cogging torque of the motor is optimized and analyzed. The results show that the optimized motor has reduced the cogging torque and torque ripple without affecting the output capacity, which is more suitable for the application in the drive system of the injection molding machine.
Influence of Diameter Increase Speed on Diameter-Axial Rolling of Large 40Cr13 Stainless Steel Ring
Authors: Shi Zhiqi , Shi Liping , Cheng Sifu 
Published: August 2023

Abstract
Rolling speed ratios during the rolling process are critical to ring forming in this pepper. The selected roll feed mode is constant with the increasing speed of ring diameter during the main rolling stage. Based on Deform-3D finite element software, a large size ring with a diameter of φ1530 mm was taken as the research object. The numerical model of a large 40Cr13 stainless steel ring is established. The radial-axial rolling process of rings under different diameter increase speeds was simulated, and the changes in radial rolling force, temperature, and strain distribution of rings after rolling were analyzed under different diameter increase speeds. The results show that under the same conditions as other parameters, increasing the ring diameter increase speed has less effect on the temperature and equivalent standard deviation of variation inside the ring after rolling, but has more effect on the external surface, and both SDP and SDT decrease with the increase of ring diameter increase speed. The ring diameter increase speed on the maximum rolling force is more obvious, with the diameter increasing speed increasing. Using the rolling force, temperature standard deviation, and equivalent effect variation standard deviation as reference indexes, the diameter increase rate suitable for 40Cr13 rings is 6 mm/s.
Calculation and Analysis of Short Circuit Strength of Three-Winding Transformer
Authors: An Qi , Li Hongda 
Published: August 2023

Abstract
The transformer is the most important in the entire power system and is also one of the most expensive devices. The operating condition of the transformer affects itself and at the same time concerns the stability and safety of the whole power system. This paper deals with leakage field, short-circuit electromotive force, and other issues in the transformer. The basic data of the SFSZ-40000/110 power transformer is calculated as an example, and then the leakage field of winding and short-circuit electromotive force is calculated and analyzed.
Numerical Simulation of a Novel Flow Channel with Aligned Concave-Convex Cavities to Enhance the Performance of PEMFC
Authors: Chen Mengdong , Yao Wenzhuo , Deng Zhanfeng , Ma Meixiu , Tan Hui , Xu Guizhi , Hu Xiao , Xia Xiaojian 
Published: August 2023

Abstract
The bipolar plates are important components of fuel cells and its characteristics and cross-section shape have a significant influence on the performance of PEMFCs. A new-type flow channel with aligned fan-shape concave-convex cavities is presented. A 3D, single-phase model for PEMFC with the new-type flow channel is developed. The polarization curve, current density distribution as well as the oxygen concentration distribution of straight channel and the new-type flow channel are compared through CFD simulation. The performance of PEMFC with the new-type flow channel has been more improved than that with straight flow channels. The simulation results also show that the new-type flow channel with aligned fan-shaped concave-convex cavities improves the current density and the net power is increased by 2.6%. Moreover, the proposed novel flow channel is also very simple and inexpensive for manufacturing.
The influence of parameters of linear flat bottom chip breaker on chip flow
Authors: Chen Yingyi , Chen Shunqing 
Published: August 2023

Abstract
The simulation model of cutting TC4 titanium alloy with a YG8 cemented carbide tool is established through ABAQUS. The minimum width of the chip breaker, anti-chip surface angle, bevel angle of chip breaker, and the change of chip breaker front angle at the tooltip are changed by controlling other chip breaker parameters unchanged. Orthogonal tests are established under different edge angles to analyze the influence of the relevant parameters of the chip breaker on the chip angle and the influence of the change of the chip breaker parameters on the chip angle under different inclination angles. The results show that the chip breaker parameters affect the chip flow direction. The larger the groove spacing is, the smaller the chip flow angle first decreases and then becomes stable. The chip flow angle increases with the increase of the anti-chip surface angle, bevel angle of the chip breaker, and chip breaker front angle. The larger the inclination angle is, the more obvious the influence of chip breaker parameters is.
Driving Force of Electric Four-Wheel Drive Rodless Aircraft Tractor When Crossing Obstacles
Authors: Zhang Mingyang , Wang Haitao , Li Shiran , Qin Yugui 
Published: August 2023

Abstract
In this paper, the driving force of the electric four-wheel drive rodless aircraft tractor during obstacle crossing is monitored in real time, and the relationship between the four-wheel driving forces of the tractor under different obstacle-crossing conditions is analyzed. By comparing the influence of obstacle height, obstacle-crossing mode, initial obstacle-crossing speed, and wheel load on the obstacle-crossing driving force, the efficient obstacle-crossing method of the tractor is summarized. By analyzing the change of four-wheel driving force during obstacle crossing, the necessary theoretical and experimental basis is provided for the design and selection of a four-wheel drive rodless aircraft tractor.
Research on Dissipation Dilution Mechanism and Boundary Dissipation Suppression Technique for High-Stress Graphene Nanoelectromechanical Resonator
Authors: Liu Ying , Zhen Jia Peng , Yang Wen Xiang , Zheng Xian De , Guo Si Lin , Zhang Yong , Yang Peng , Lv Ke Hong , Qiu Jing , Liu Guan Jun 
Published: August 2023

Abstract
The low-quality factor is a key bottleneck for the engineering and commercial application of graphene nanoelectromechanical resonators at room temperature. The hypothesis in dissipation dominated by the ohmic loss is difficult to cover this phenomenon. Mechanical loss may still be on the list of the main causes for the quality factor stress-modulation characteristics of graphene resonators. The dissipation dilution theory reveals the intrinsic energy and dissipation mechanism of the traditional high-stress silicon-based resonator, which may also be applied to two-dimensional (2D) materials if dominated by mechanical loss. Based on Zener’s model of anelasticity, combined with the edge-corrected mode shape, the stress dilution mechanism of the bending potential dissipation of the graphene resonator is revealed. On this basis, the resonator dissipation is decomposed into boundary dissipation and non-boundary dissipation parts, and the steep rise phenomenon of the bending dissipation density (curvature) in the boundary region is analyzed through theoretical calculation. The analysis reveals that boundary dissipation is dominant in bending dissipation. To effectively suppress the boundary dissipation, a novel design of a graphene resonator via soft-clamped phononic crystal (PnC) is proposed. The existence of localized mode (LM) and effective suppression of boundary dissipation are verified in the simulations of both triangular and honeycomb PnC lattices. The theoretical model developed in this paper provides a new window into the dissipation properties of graphene nanoelectromechanical resonators, and the design of graphene resonators via soft-clamped PnC is expected to provide a new route toward high-quality factors at room temperature.
Dual-Layer Starch-based Biological Hydrogel Durable Evaporator for Efficient Solar Steam Generation
Authors: Xu Pengtao , Xia MengSheng , He Qian , Shi Qian , Gao Junkai 
Published: August 2023

Abstract
Solar-powered desalination is an effective means to address the global freshwater shortage and combat water pollution. However, the light absorption capacity, thermal insulation performance, and water transmission efficiency of most current solar evaporators cannot be effectively combined, resulting in a relatively low utilization rate of solar energy. In this study, a double-layer solar evaporator was reported by using starch as the biological hydrogel matrix and carbon nanotubes as an efficient light-absorbing material, which greatly improved the solar energy utilization rate of the evaporator and the steam generation efficiency was as high as 2.21 kgm−2h−1 under 1.0 sun.
Tension Characteristics of Cable-Driven System Based on ALE Formulation
Authors: Chen Da-Yuan , Zhang Huan , Song Xiao-Dong , Zhang Tian-ci , Hou Yue 
Published: August 2023

Abstract
This paper mainly studies the tension characteristics of cables in Cable-Driven Parallel Mechanisms (CDPMs). The exact catenary model and cable model based on the Arbitrary Lagrangian Eulerian description (ALE) are used. First, the ALE cable model and the exact catenary model are used to analyze and compare the tension at each point of a single cable, which proves the calculation accuracy of the ALE cable model. Then, the cable model described by ALE is used to model the Cable-Driven Parallel Mechanisms, the end effector is enabled to do a specific helical motion, the tension characteristics of the cable are extracted and analyzed, and the mesh independence of the ALE elements and calculation convergence are verified.
Structural Design and Static Calibration of Six-axis Force/Torque Sensor
Authors: Li Shuge , Zhao Pengju , Sun Wencheng 
Published: August 2023

Abstract
A six-axis force/torque sensor is designed to solve the problems of the sensor with a resistance strain gauge. For instance, if the adhesive layer of the resistance strain gauge is not firm, the elastic sensing beam will have plastic deformation. The cylindrical conductive rubber is used as the sensing unit, which can detect force/torque by the change of the piezoresistive values. The units are arranged in a spatial eight-point staggered manner, which can reduce the dimensional coupling from the structure. The sensor static calibration is systematically analyzed and researched. The linear decoupling model of the measurement system that incorporating the Least Squares algorithm is established to reduce the dimensional coupling. The new type of sensor structure and static linear calibration algorithm proposed in this paper have good practical applications and popularization values.
In Situ Biomaterial Printing Technology Based on Transfer Molding
Authors: Yuanyuan Liu , Zhian Jian , Yi Zhang , Huazhen Liu , Jie Wang , Jianan Chen 
Published: August 2023

AbstractSkin is one of the largest and most important organs in the human body. When faced with a large, full-thickness skin burn, there is not enough healthy skin to graft. In this case, we can replace our skin with biomaterials. Due to its characteristics of water permeability, antibacterial properties, biocompatibility, self-debridement, and so on, the hydrogel is undoubtedly a better alternative material. Among the methods of hydrogel preparation, in situ material molding has attracted a lot of attention for its unique advantages. Here, we proposed an in situ forming process based on transfer printing and verified the feasibility of the transfer printing process using a three-axis platform. The in situ molding equipment was designed to realize the in situ material transfer process, which prepared the conditions for the subsequent process optimization, cell experiment verification, and animal experiment.
Microstructure and tensile properties of microalloyed Zn-xMg alloys
Authors: Zhang Tianwei , Zhang Mingyu , Liu Zhihui , Wang Weidan , Zhou Ke , Zhao Dewei 
Published: August 2023

Abstract
Zn-xMg alloys with different Mg contents were prepared by adding the Mg element to pure Zn. The effects of different Mg contents on the microstructure and tensile properties of Zn-xMg alloys were studied by scanning electron microscopy, XRD ray diffractometer, and tensile test. The results show that the microstructure of pure Zn and Zn-xMg alloys is composed of coarse grains, and there are twins in the microstructure morphology. The diffraction peak of pure Zn is mainly β-Zn. After adding the Mg element, α-Mg, and Zn2Mg11, diffraction peaks appear in the XRD diffraction pattern. With the increase of Mg content in the alloy, the number of Zn2Mg11 diffraction peaks increases. It is found that the strength and plasticity of the alloy increase with the increase of Mg content. The tensile fracture morphology of the alloy is mainly rock with or without the Mg element and has obvious brittle fracture characteristics.
The Correlation Between the Temperature Control Effect and Thermoelectric Properties of CNTs/Mn-Zn Ferrite Composites
Authors: Zhang Shupin 
Published: August 2023

Abstract
Mn-Zn ferrite has been widely used in cancer therapy. In this paper, CNTs/Mn-Zn ferrite composites with different CNT contents were synthesized using the co-precipitation process and then sintered into bulk materials by SPS. The nanoparticles have good heating and temperature control effects under an alternating magnetic field. Furthermore, the sintered composites have thermoelectric properties. The correlation between the temperature control mechanism and the thermoelectric properties of manganese zinc ferrite for thermotherapy is investigated.
Software Defined Network-Based Multi Service Routing Algorithm for Spatial Information Network
Authors: Wei Debin , Cao Yu , Teng Qixiu , Yang Li 
Published: August 2023

Abstract
In order to solve the problems of unbalanced utilization of link resources due to the different capabilities of nodes in the spatial information network and the difficulty of satisfying the quality of service(QoS) with the change of task requirements, this paper proposes a multi-service routing algorithm for a spatial information network based on Software Defined Network(SDN), which divides the network transmission services into three categories: delay sensitive, bandwidth sensitive and packet loss rate sensitive. The link state information between satellite nodes is collected by an SDN controller, and then the topology-based bidirectional search algorithm is used to establish a “Source-Destination” set of routes between satellite nodes, the algorithm counts the delay, bandwidth, and packet loss rate of each route in the set, and selects routes that meet the needs of different business classes for data forwarding. The results show that the routing cost of this algorithm is lower than other algorithms, and it has better throughput performance.
Ultra-short-term Photovoltaic Power Prediction Based on Multi-head ProbSparse Self-attention and Long Short-term Memory
Authors: Yang Tianyi , Zhao Quanming , Meng Yifan 
Published: August 2023

Abstract
To provide accurate predictions of photovoltaic (PV) power generation, an MHPSA-LSTM ultra-short-term multipoint PV power prediction model combining Multi-head ProbSparse self-attention (MHPSA) and long short-term memory (LSTM) network is posited. The MHPSA is first used to capture information dependencies at a distance. Secondly, the LSTM is used to enhance the local correlation. At last, a pooling layer is added after LSTM to reduce the parameters of the fully-connected layer and alleviate overfitting, thus improving the prediction accuracy. The MHPSA-LSTM model is validated on a PV plant at the Desert Knowledge Australia Solar Centre as an example, and the RMSE, MAE, and R2 of MHPSA-LSTM are 0.527, 0.264, and 0.917, respectively. MHPSA-LSTM has higher prediction accuracy compared with BP, LSTM, GRU, and CNN-LSTM.
Fault diagnosis for battery pack in electric vehicles using thresholds for multiple safety indicators
Authors: Wang Yi , Luo Shaohua , Ou Yang , Bai Qin , Zhang Wendong 
Published: August 2023

AbstractA reliable and timely thermal runaway alarming method is useful to avoid potential fires happening to electric vehicles (EVs). In this paper, fault diagnosis for the battery pack in EVs using thresholds for multiple safety indicators. Firstly, a deep neural network is used to predict temperature and voltage in the future. Then both voltage-related and temperature-related safety indicators are extracted, including extremum entropy, variance entropy, cumulative center distance, and temperature rise rate. Their corresponding thresholds are defined using a boxplot. Verification using real-world fired EV data shows that the proposed method could realize 10–13 min ahead thermal runaway alarming.
Research on the operation state prediction of energy storage unit based on neural network
Authors: Yin Changyong , Zhao Ziqi , Zhang Shiqi , Gao Zexiang 
Published: August 2023

Abstract
As a device that can conduct energy storage and release, the energy storage system can accelerate the utilization of new energy and enhance the operation stability of the grid. The main significance of the time series prediction is to analyze the future change trend of the data based on historical data. To more exactly predict the future change trend of the operating state parameters of the energy storage unit, the charge and discharge current data and operating voltage data of the energy storage unit are analyzed and studied. The long short-term memory is used to predict the operating voltage and charge and discharge current of the distributed energy storage unit.
Train operation scheduling optimization based on deep reinforcement learning
Authors: Yang Xue , Wang Huan , Li Lijuan 
Published: August 2023

Abstract
The impact of time delays caused by unexpected events on trains spreads along the complex and widely distributed area of the high-speed railway network. Large train arrivals and departures are delayed. Serious social impact and huge loss of economic benefits are incurred. To solve the problems, the dynamic scheduling model of a high-speed train is established with the objective of minimizing the total delay time and energy consumption of the train. The DDPG algorithm is used to solve the model. The effectiveness of the algorithm for the dynamic scheduling of the high-speed train is verified through experiments, which provides a good basis for high-speed train dispatchers to make optimization decisions.
Comprehensive Improvement and Application of Copper Row Chain System of TOBSPIN Tobacco Cutter
Authors: Xu Min , Xu Li , Gong Jianqiang , Sun Kelei , Long Yue , Han Qiujing , Wang Miao 
Published: August 2023

Abstract
In order to solve the problem of abnormal wear of the lower copper row chain of TOBSPIN tobacco cutter, the working principle of the compaction unit of the wire-cutting machine was analyzed. Comprehensive improvements were made to the lower copper row chain system, which effectively reduced the wear on both sides of the copper row chain and prolonged the usage time of the copper row chain. Tested with TOBSPIN shredder used by Ningbo Cigarette Factory, the results showed that the wear speed of the improved copper exhaust chain was reduced from 2.62 mm / 800 h to 0.85 mm / 800 h, down by 67.6%. This method can support improving the service life of TOBSPIN tobacco cutters.
Study on Calibration of Oxygen Transmission Rate Measurement Apparatus for Plastic Film and Sheeting
Authors: Xu Yang , Liu Ying , Ren Tingting , Zeng Lingjian , Li Xianhong 
Published: August 2023

Abstract
The oxygen transmission rate measurement apparatus for plastic film and sheeting is mainly used to measure the oxygen transmission rate and oxygen transmission coefficient of plastic film and sheeting. Oxygen transmission tests can analyze and solve the problems caused by oxygen, such as oxidation deterioration. At present, there is no relevant calibration specification or method for oxygen transmission rate measurement apparatus for plastic film and sheeting in China. This article presents a novel calibration method to evaluate the measurement accuracy and temperature control performance of the apparatus by determining corresponding environmental conditions, calibration standards, and calculation equations. The calibration results show that the calibration method is scientific and practical for the metrological performance evaluation of oxygen transmission rate measurement apparatus for plastic film and sheeting.
Design and testing of automatic downpipe equipment for deep grain piles
Authors: Ming Lei , Zheng Jiahong , Shi Yue , Dong Jiahou 
Published: August 2023

Abstract
China is a large grain storage country, and at this stage, the effective storage capacity of the country has exceeded 900 million tonnes. Grain is subject to localized high temperatures, pests, and other abnormalities during storage. Therefore, regular quality checks need to be carried out on the grain, and cuttings are the first step in carrying out grain quality checks. The current domestic cutting equipment suffers from low cutting efficiency and high manual labor intensity, so the need to develop new cutting equipment is imminent. In response to the current problems with domestic cuttings equipment, this work has developed a deep grain pile automatic down tube equipment, which is driven by compressed air and is capable of completing cuttings within a ten-meter depth range in grain silos. Compared with traditional cutting equipment, this equipment greatly improves the efficiency of cutting samples, reduces manual labor intensity, provides new ideas for the development of automation of cutting equipment, and has a broad market.