bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scanning Electrochemical Probe Lithography for Ultra‐Precision Machining of Micro‐Optical Elements with Freeform Curved Surface
Authors: Xu Hantao , Han Lianhuan , Huang Jianan , Du Bingqian , Zhan Dongping 
Published: June 2024

AbstractTwo challenges should be overcome for the ultra‐precision machining of micro‐optical element with freeform curved surface: one is the intricate geometry, the other is the hard‐to‐machining optical materials due to their hardness, brittleness or flexibility. Here scanning electrochemical probe lithography (SECPL) is developed, not only to meet the machining need of intricate geometry by 3D direct writing, but also to overcome the above mentioned mechanical properties by an electrochemical material removal mode. Through the electrochemical probe a localized anodic voltage is applied to drive the localized corrosion of GaAs. The material removal rate is obtained as a function of applied voltage, motion rate, scan segment, etc. Based on the material removal function, an arbitrary geometry can be converted to a spatially distributed voltage. Thus, a series of micro‐optical element are fabricated with a machining accuracy in the scale of 100 s of nanometers. Notably, the spiral phase plate shows an excellent performance to transfer parallel light to vortex beam. SECPL demonstrates its excellent controllability and accuracy for the ultra‐precision machining of micro‐optical devices with freeform curved surface, providing an alternative chemical approach besides the physical and mechanical techniques.
A General Strategy toward Self‐assembled Nanovaccine Based on Cationic Lentinan to Induce Potent Humoral and Cellular Immune Responses
Authors: Yu Ruihong , Jin Lan , Song Zuchen , Jiao Lina , Wang Zheng , Zhou Yantong , Ma Yan , Guan Sumei , Zhang Zhimin , Wang Deyun , Liu Huina , Sun Yuechao , Zhang Shun , Cai Ting , Sun Haifeng , Qiu Yawei , Miao Jinfeng , Liu Zhenguang 
Published: June 2024

AbstractAdjuvants play a critical role in the induction of effective immune responses by vaccines. Here, a self‐assembling nanovaccine platform that integrates adjuvant functions into the delivery vehicle is prepared. Cationic Lentinan (CLNT) is mixed with ovalbumin (OVA) to obtain a self‐assembling nanovaccine (CLNTO nanovaccine), which induces the uptake and maturation of bone marrow dendritic cells (BMDCs) via the toll‐like receptors 2/4 (TLR2/4) to produce effective antigen cross‐presentation. CLNTO nanovaccines target lymph nodes (LNs) and induce a robust OVA‐specific immune response via TLR and tumor necrosis factor (TNF) signaling pathways, retinoic acid‐inducible gene I (RIG‐I) receptor, and cytokine‐cytokine receptor interactions. In addition, CLNTO nanovaccines are found that promote the activation of follicular helper T (Tfh) cells and induce the differentiation of germinal center (GC) B cells into memory B cells and plasma cells, thereby enhancing the immune response. Vaccination with CLNTO nanovaccine significantly inhibits the growth of ovalbumin (OVA)‐expressing B16 melanoma cell (B16‐OVA) tumors, indicating its great potential for cancer immunotherapy. Therefore, this study presents a simple, safe, and effective self‐assembling nanovaccine that induces helper T cell 1 (Th1) and helper T cell (Th2) immune responses, making it an effective vaccine delivery system.
A High‐Performance Passive Radiative Cooling Metafabric with Janus Wettability and Thermal Conduction
Authors: Du Peibo , Zhao Xingshun , Zhan Xiongwei , Li Xiaoyan , Hou Keru , Ji Yating , Fan Zhuizhui , Muhammad Javed , Ge Fengyan , Cai Zaisheng 
Published: June 2024

AbstractWith the development of industry and global warming, passive radiative cooling textiles have recently drawn great interest owing to saving energy consumption and preventing heat‐related illnesses. Nevertheless, existing cooling textiles often lack efficient sweat management capacity and wearable comfort under many practical conditions. Herein, a hierarchical cooling metafabric that integrates passive radiation, thermal conduction, sweat evaporation, and excellent wearable comfort is reported through an electrospinning strategy. The metafabric presents excellent solar reflectivity (99.7%, 0.3–2.5 µm) and selective infrared radiation (92.4%, 8–13 µm), given that the unique optical nature of materials and wettability gradient/micro‐nano hierarchical structure design. The strong moisture‐wicking effect (water vapor transmission (WVT) of 2985 g m−2 d−1 and directional water transport index (R) of 1029.8%) and high heat‐conduction capacity can synergistically enhance the radiative cooling efficiency of the metafabric. The outdoor experiment reveals that the metafabric can obtain cooling temperatures of 13.8 °C and 19.3 °C in the dry and sweating state, respectively. Meanwhile, the metafabric saves ≈19.3% of annual energy consumption compared with the buildings with HAVC systems in Shanghai. The metafabric also demonstrates desirable breathability, mechanical strength, and washability. The cost‐effective and high‐performance metafabric may offer a novel avenue for developing next‐generation personal cooling textiles.
Disorganised Collective Citizens’ Interest, Social Transformations and Technopopulism
Authors: Tudzarovska Emilija 
Published: June 2024

AbstractNew ways of doing politics, embodied in the appeal to populism, the appeal to technocracy, or both combined, that is, ‘technopopulism’, are revealing symptoms of crisis in citizens’ representation in democratic societies in the European Union. This type of doing politics indicates ruptures in the organised citizens’ interest, which are leading to the rise of new parties and party leaders promising to solve ‘the people’s’ problem in general, that is, populism, and of unelected technocrats that offer economic solutions and managerial approaches ‘for doing politics, but not policy’. It also a precursor in determining how countries can navigate systemic health crises like the COVID-19 pandemic. Both are symptoms of the same crisis of democratic representation of citizens’ organised interests. To unpack the causes, this chapter looks at the historical conditions under which technopopulism has risen since the 1990s. The Czech Republic in Central-East Europe and France in Western Europe, as two different cases with the same outcome, are used to illustrate the same path dependency of the conditions leading to the use of the logic of technopopulism. It argues that these ruptures are the result of the long processes that have led to disorganised citizens’ interests amidst the shift to neoliberal doctrine, the decline of party politics, and societal transformations in globalised societies.
Non-iterative Modal Resolution Calculi
Authors: Pattinson Dirk , Nalon Cláudia 
Published: July 2024

AbstractNon-monotonic modal logics are typically interpreted over neighbourhood frames. For unary operators, this is just a set of worlds, together with an endofunction on predicates (subsets of worlds). It is known that all systems of not necessarily monotonic modal logics that are axiomatised by formulae of modal rank at most one (non-iterative modal logics) are Kripke-complete over neighbourhood semantics. In this paper, we give a uniform construction to obtain complete resolution calculi for all non-iterative logics. We show completeness for generative calculi (where new clauses with new literals are added to the clause set) by means of a canonical model construction. We then define absorptive calculi (where new clauses are generated by generalised resolution rules) and establish completeness by translating between generative and absorptive calculi. Instances of our construction re-prove completeness for already known calculi, but also give rise to a number of previously unknown complete calculi.
Experimental Study on the Impact of Thermal Stress on Aircraft Structural Performance
Authors: Bo Xiaoli 
Published: June 2024

AbstractThe local heat source of a civil aircraft affects the temperature of the lower panel structure of the center wing. In this paper, a local heat source is arranged on the lower panel structure of the center wing. The strain of the center wing lower panel skin under different temperature gradients under local thermal loads and the corresponding temperature gradients around the heat source were investigated. The natural mesh model and the fine finite element model were used to analyze the thermal load of the center wing lower panel. The temperature on the node was applied according to the real temperature in the test, and the analysis results were compared with the test values. After comparative analysis, the strain value of the natural mesh model has a high degree of fit with the test value, and the analysis results of the natural mesh model can be used to analyze the thermal stress intensity of the center wing lower panel.
Analysis of Deformation in Aircraft Skin Vacuum Adsorption Clamping
Authors: Xing Wenhao , Wang Aimin , Wu Long , Xu Baode , Zhang Jiayu , Yu Yuan 
Published: June 2024

AbstractLarge lightweight alloy skin panels are extensively utilized in the aerospace industry and serve as crucial components constituting the outer shells of aircraft, launch vehicles, manned spacecraft, and other equipment. However, due to their thin-walled nature and limited stiffness, they are susceptible to clamping deformation and machining-induced deformations. Vacuum adsorption technology is widely employed in aircraft manufacturing to mitigate part deformation during machining through the utilization of profiling molds. However, to achieve the milling and drilling tasks in a single clamping process, it is necessary to reserve drilling positions in the vacuum adsorption mold. Unfortunately, this leads to significant deformation of the aircraft skin at the reserved drilling positions during processing. This article utilizes finite element simulation technology to analyze the deformation of the aircraft skin during the vacuum adsorption clamping process. The simulation results indicate that the maximum deformation reaches 5.602 mm, which primarily occurs at the middle hole of the vacuum adsorption mold. To address this issue, the article proposes a solution of adding sealing strips around the reserved holes. This solution effectively reduces the deformation of the skin during the processing stage.
A Review on Safety Management Strategies: Theory and Practical Application of Lithium-Ion Power Batteries
Authors: Yi Xiaojian , Hu Lin , Liu Shuang , Zou Changfu 
Published: June 2024

AbstractBattery safety in electric vehicles is a comprehensive engineering endeavor that requires meticulous consideration at every stage, including battery materials, battery pack design, and battery management systems (BMS). This review focuses on safety management strategies and practical applications of lithium-ion power batteries. The management of battery safety primarily encompasses charge and discharge safety, high-voltage safety, and thermal safety. Among these, charge and discharge safety management aims to prevent battery damage or safety incidents caused by overcharge or over discharge. High-voltage safety management involves detecting insulation faults, overcurrent, and other potential risks to prevent electrical hazards. Thermal safety management ensures individual battery cells, modules, and the battery pack maintain an optimal operating temperature range and uniform temperature distribution, thereby preventing thermal runaway.
Design of Expandable Electric Vehicle Drive Demonstration Teaching Platform
Authors: Zhao Zifeng , Chen Zele , Huang Shaojia , Fan Jianguo , Gao Lijie 
Published: June 2024

AbstractIn recent years, the new energy vehicle industry has been vigorously developed, and the demand for new energy vehicle practitioners and their knowledge of electric vehicles has been continuously increasing. In the undergraduate education of vehicle engineering, there is an urgent need for an electric drive demonstration teaching platform. This design aims to solve the teaching demonstration function of multiple configurations of electric vehicle drive systems on the same platform. The electric vehicle drive demonstration teaching platform is designed as an expandable way, which can meet the requirements of various combinations of different motor forms, battery types and capacities, control methods, etc. for platform loading and demonstration, achieving diversification of the teaching platform. It can also conduct experiments on various types of new energy vehicle configurations through connecting racks The expansion of the demonstration teaching platform meets the needs of teaching demonstrations and experiments related to electric vehicle drive systems.
Piecewise Linear Recursion Iterative Method for Form Finding and Force Analysis of Suspension Cable
Authors: Shang Renjie , Ren Linghao , Huang Pianpian 
Published: June 2024

AbstractThe suspension cable structure has the advantages of saving steel, light weight, beautiful in shape, and has been widely used in long-span bridges. In recent years, the suspension cable structure has been used in the flexible photovoltaic supports of small and medium-sized spans. The existing piecewise catenary method and finite element method have the problems of initial value sensitivity and easy divergence due to the highly geometric nonlinearity of suspension cable structure, and a practical calculation method of piecewise linearization of the suspension cable is proposed in this paper. The suspension cable is divided into n (n ≥ 40) segments. First, the initial values of inclination angle and tension of the left end of the suspension cable are given roughly, and the position of the right end of the suspension cable can be obtained by piecewise recursive method according to the external forces. Based on the deviation between the calculated position and the target position of the right end of the cable, the values of the inclination angle and tension of the left endpoint of the suspension cable are modified, and the second iteration is carried out. In this way about 3–6 iterations, the calculated position of the right end of the cable can converge to the target position, and the exact geometry and internal force of the suspension cable can be obtained. The method can be used to calculate the internal force and deformation of suspension bridges under static loads, and the results accuracy fully meets the engineering design requirements.
Design of Fiber Winding for Thick-Walled Cylinder with Uniform Residual Tension
Authors: Yang Zilong , Yang Fujiang 
Published: June 2024

AbstractFiber winding with metal cylinders as liners is the primary method used for producing high-speed rotors, flywheels, and pressure vessels. A design model was established for thick-walled cylindrical fiber winding by using the layer-by-layer stacking method of thin composite material rings in this article. The effect of liner structure and fiber type on prestress was analyzed. And the phenomenon of tension loss in no-twist fibers was studied. The winding tension of each layer was calculated accurately under the condition of uniform residual tension, which was the optimal process in engineering. Compared with the experimental results, the computational error of the model does not exceed 5%. The winding model developed in this article, which takes into account tension loss, can more accurately guide the design of winding tensions for thick-walled cylinders.
A Method of Assembling Clearance Measuring of Oil Film Bearing in Tandem Cold Mill
Authors: Sun Bo , Liu Chuanjian , Zhou Weimin , Xu Zhan , Cao Heng 
Published: June 2024

AbstractIn order to reduce the certain number of oil film bearing burning accident, this paper proposes a novel method used to test static pressure pipes and measure the assembling clearance between sleeve and bush inside the bearing. On account of the theory of lubrication and the working mechanism for oil film bearing, through the development of a new set of hydrostatic oil supply system and test platform, provide the static supporting pressure and the disassembling and locking pressure. And based on this method, the assembling clearance measuring was carried out. The results show that the proposed measuring method has the ability to support the disassembling and assembling process of the oil film bearing. In addition, this method provides an important basis for the engineers of cold rolling mill on site to adjust the assembling clearance of oil film bearing. The application of this method effectively reduces the online burning accidents of the oil film bearing.
Research on Equivalent Wind Load Spectrum Acquisition and Remaining Fatigue Strength Method of Double Active Arm Type Holding Pole
Authors: Liu Wenwu , Zhang Hongsheng , Lu Nianli 
Published: June 2024

AbstractIn order to study the wind load fatigue residual strength in in-service holding poles for preventing disasters, and improving load-bearing capacity reliability. Firstly, using the Davenport wind speed spectrum to simulate the wind speed, it will be the input load of the finite element dynamics model of the 2 × 40 kN double active arm type holding pole (DAATHP). The stress time history curve at the welding section of the main chord at the bottom of the tower shaft is obtained at the working condition with the wind angle of 0°, 45°, 90°, and 135°. The rain flow counting method derives the statistical characteristics of the mean, amplitude, and frequency of stress at four wind angles. Secondly, the frequency of wind load under four wind angles is extended, and the synthesized fatigue load spectrum is used as the equivalent wind load spectrum. Finally, the Paris-Eadogan equation is used to derive the calculation formula of fatigue residual strength of the main chord at the bottom of the tower shaft, and the functional function of the main chord is established and then the failure probability formula is derived by combining the equivalent wind load spectrum. It is found that, compared with the ANSYS calculation results, the error of the predicted stress spectrum of the proposed method is minor, only 7.95%. It is verified that the proposed method can efficiently obtain the equivalent load spectrum of the DAATHP. The results indicate that it is feasible and practical to apply the proposed method to calculate the remaining fatigue life of the DAATHP.
A Study on Weighting Factors in Cost Function of Model Predictive Control Algorithms
Authors: You Zhou , Bian Yongming , Ding Zhangjie , Chen Li 
Published: June 2024

AbstractWith the growing emphasis on environmental protection, the engineering construction industry is facing new demands. The widespread electrification of construction machinery has emerged as an inevitable trend. To align with this trend, this paper conducts research on the model predictive control algorithm (MPC) applied to permanent magnet synchronous motors (PMSM). The MPC algorithm primarily consists of the motor’s mathematical model and the cost function. This study focuses on analyzing the weight factor within the cost function. The spectrum of weight factor combinations concerning the dq-axis current is formulated across a broad range of intervals. The algorithm’s performance is assessed under various weight factors using experimental data from three-phase current operation, motor torque, rotational speed, and other parameters. Ultimately, a novel evaluation function is proposed in this study to quantitatively assess the algorithm’s performance across various combinations. The process involves identifying the optimal combination of weight factors for the cost function. This effort contributes significantly to establishing a robust groundwork for the general electrification of construction machinery.
Multidisciplinary Design Optimization of Excavator Positive Flow Control System
Authors: Chen Yuanliu , Wang Anlin , Li Xiaotian 
Published: June 2024

AbstractDue to the obstacle to the global optimal solution through the conventional sequential design, the multidisciplinary design optimization (MDO) of an excavator positive flow control system was carried out with hydraulic components and controller programs as design objects simultaneously. The positive flow control system model was established on the basis of bench and field tests to describe the coupling relationship among different subsystems. The comprehensive performance function was proposed and the MDO was carried out with the multiway valve’s throttling characteristics, positive flow control parameters and spool geometries as design variables. Compared with the sequential design that only the control parameters were adjusted, the MDO searched a wider design space. The comprehensive working performance has been improved with the MDO of an excavator’s swing system, which is an example for forward designs of other complicated electro-mechanical-hydraulic systems.
Research on Accelerated Degradation Test and Reliability Evaluation Method for Hydraulic Pumps Based on Parallel Energy Saving
Authors: Qi Jianjun , Chen Shaojia , Wang Dongfeng , Wang Liqin , Guo Rui 
Published: June 2024

AbstractHydraulic pump is a product with high reliability and long-life, there exist many urgent problems like long test period, high cost and a larger power consumption in the reliability evaluation method of pump. A new kind of reliability test bench is built combined with parallel power-saving design concept, which based on principles of energy saving and power recycle. Multi-pumps reliability accelerated degradation test is achieved by applying step stress on the pump under test. Volumetric efficiency is selected as performance degradation evaluating index, the degradation of whose is much closed to real physics model. The accretion model for hydraulic pump reliability test is built based on inverse moment estimation method, by which hydraulic pump reliability level under different stress conditions is given. In the meantime, the method of concurrent accelerated degradation testing can serve as references of other core hydraulic components.
A Visual Detection Method for Train Couplers Based on YOLOv8 Model
Authors: Zhao Wenning , Yao Xin , Wang Bixin , Ding Jiayi , Li Jialu , Zhang Xiong , Wan Shuting , Zhao Jingyi , Guo Rui , Cai Wei 
Published: June 2024

AbstractAccurately identifying the coupler operating handle during the operation of the hook-picking robot has a significant impact on production activities. This article is based on the YOLOv8 model. Due to the limited variety of on-site coupler operating handles and working environment, it is difficult to ensure the richness of image categories in the dataset. Before the experiment, a series of expansion operations were performed on the dataset, such as rotation, translation, and brightness adjustment. Use the expanded images to simulate the images detected by the hook-picking robot in harsh environments. This model performs feature extraction and target recognition on the expanded coupler handle dataset, thereby achieving recognition of the coupler handle. The experimental results show that the accuracy of the model for the coupler handle in complex environments is 98.8%, which effectively reduces the time required for training and testing. Compared with the commonly used SSD300 model and YOLOv4Tiny model, it not only has higher accuracy, but also shows obvious advantages in parameter quantity, weight file size, and other aspects, which can be well deployed in actual production.