Qingdong Zhang
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View article: Broadband Photoconductive Antenna with Enhanced Full-Band Radiation Power Based on Dual-Frequency Complementary Technology
Broadband Photoconductive Antenna with Enhanced Full-Band Radiation Power Based on Dual-Frequency Complementary Technology Open
In this paper, a broadband photoconductive antenna (PCA) with enhanced full-band radiation power is proposed based on dual-frequency complementary technology. In the proposed PCA, dual-frequency metallic bar resonators are combined with th…
View article: Study on VOCs emission during profile control and reuse of produced liquid sediment
Study on VOCs emission during profile control and reuse of produced liquid sediment Open
View article: The preparation and bonding property of PET-steel composite sheet with the interlayer of PU film
The preparation and bonding property of PET-steel composite sheet with the interlayer of PU film Open
The PET-steel composite sheet with the interlayer of PU film has been produced, and the effect of interlayer thickness on the interface bonding strength has been researched. The experimental results indicate that the PET-PU-steel composite…
View article: Mechanical stress facilitates calcium influx and growth of alveolar epithelial cells via activation of the BDKRB1/Ca2+/CaMKII/MEK1/ERK axis
Mechanical stress facilitates calcium influx and growth of alveolar epithelial cells via activation of the BDKRB1/Ca2+/CaMKII/MEK1/ERK axis Open
View article: Gated box jittering and data augmentation scheme optimized soft-teacher for semi-supervised object detection
Gated box jittering and data augmentation scheme optimized soft-teacher for semi-supervised object detection Open
Auto-driving trains are essential in today's intelligent transportation, with object detection being key in automated systems. This study presents the Nanchang Railway Group Large-Scale Dataset (NR-L) to fill the gap in data with limited t…
View article: The Effect of Residual Stress on the Fatigue Crack Propagation of 18crnimo7-6 Alloy Steel Under Different Stress Radio
The Effect of Residual Stress on the Fatigue Crack Propagation of 18crnimo7-6 Alloy Steel Under Different Stress Radio Open
View article: Investigation of hot deformation behavior and three-roll skew rolling process for hollow stepped shaft of Al–Zn–Mg–Cu alloy
Investigation of hot deformation behavior and three-roll skew rolling process for hollow stepped shaft of Al–Zn–Mg–Cu alloy Open
The increasing demand for high-strength lightweight hollow shafts in transportation highlights the need for advanced fabrication techniques. Al–Zn–Mg–Cu alloys, noted for their superior properties, are selected for three-roll skew rolling …
View article: Investigation of deformation behavior and strain-induced precipitations in Al–Zn–Mg–Cu alloys across a wide temperature range
Investigation of deformation behavior and strain-induced precipitations in Al–Zn–Mg–Cu alloys across a wide temperature range Open
View article: A method for reducing the length difference of Vickers indentation diagonal
A method for reducing the length difference of Vickers indentation diagonal Open
This paper aims to analyse the reason for the relatively large length difference of the diagonal of Vickers indentation on the tested material with mechanical anisotropy and propose a feasible method to reduce it. The Vickers hardness test…
View article: Evaluation of the Bond Quality of Metal-Clad Plates Using Laser Ultrasonic Local Resonance
Evaluation of the Bond Quality of Metal-Clad Plates Using Laser Ultrasonic Local Resonance Open
The effective detection of delamination defects, especially sub-millimeter delamination defects, in metal-clad plates is of great significance in improving product quality. In this work, the laser ultrasonic (LU) local resonance method is …
View article: Joint optimization of steel plate shuffling and truck loading sequencing based on deep reinforcement learning
Joint optimization of steel plate shuffling and truck loading sequencing based on deep reinforcement learning Open
View article: Assessment of soil quality in an arid and barren mountainous of Shandong province, China
Assessment of soil quality in an arid and barren mountainous of Shandong province, China Open
View article: Variable Step-Size BDF3 Method for Allen-Cahn Equation
Variable Step-Size BDF3 Method for Allen-Cahn Equation Open
In this work, we analyze the three-step backward differentiation formula (BDF3) method for solving the Allen-Cahn equation on variable grids.For BDF2 method, the discrete orthogonal convolution (DOC) kernels are positive, the stability and…
View article: Simulation and Experimental Study on the Precision Molding of Irregular Vehicle Glass Components
Simulation and Experimental Study on the Precision Molding of Irregular Vehicle Glass Components Open
The high level of stress and dimension deviation induced by glass molding are the main causes of the low yield rate of large, irregular glass components on vehicles. To solve this issue, a numerical model of large glass component molding w…
View article: Research on Escape VOCs Gas Technology in Treating Petrochemical Wastewater by Multiphase Absorption Method
Research on Escape VOCs Gas Technology in Treating Petrochemical Wastewater by Multiphase Absorption Method Open
The fugitive VOCs generated by wastewater of petrochemical enterprises have caused a large amount of pollution due to their high fugitive concentration, complex composition and difficult treatment. In this paper, the fugitive VOCs generate…
View article: Modified Arrhenius constitutive model and simulation verification of 2A12-T4 aluminum alloy during hot compression
Modified Arrhenius constitutive model and simulation verification of 2A12-T4 aluminum alloy during hot compression Open
An accurate constitutive model is imperative to describe the deformation behavior of aluminum alloy in numerical simulation of thermal plastic forming process. In this study, isothermal uniaxial compressions of 2A12-T4 aluminum alloy were …
View article: Research on the Effect of Heat Tensioning on the Dynamic Stability of Circular Saw Blades with External Scrapers
Research on the Effect of Heat Tensioning on the Dynamic Stability of Circular Saw Blades with External Scrapers Open
Heat tensioning was proposed and proved to be effective for improving the dynamic stability of circular saw blades with ideal disk structure by a previous scholar. With the diversification of circular saw blade structure, circular saw blad…
View article: Evaluation of the Thickness of Each Layer of Cu/Al Laminate Using Laser Ultrasonic
Evaluation of the Thickness of Each Layer of Cu/Al Laminate Using Laser Ultrasonic Open
A new method of detecting the thickness of each layer of Cu/Al laminates based on laser ultrasound was proposed for the online non-contact measurement of the thickness of each layer of Cu/Al laminates during the rolling process. This metho…
View article: The Indentation Shape of Vickers Indenter with Different Orientation on the Anisotropic Material
The Indentation Shape of Vickers Indenter with Different Orientation on the Anisotropic Material Open
View article: Study on Interface Heat Transfer and Polymer Film Melting-Filling Behavior During the Laminating Process for Laminated Steel
Study on Interface Heat Transfer and Polymer Film Melting-Filling Behavior During the Laminating Process for Laminated Steel Open
摘要: 覆膜铁是金属包装领域的新型复合材料。成品覆膜铁的界面结合强度和水透性取决于覆膜过程中高聚物薄膜熔融层的厚度和流动铺展行为。但覆膜过程复杂而迅速,且受钢板表面微观形貌影响,熔融层膜厚及其流动铺展行为难以精细调控。针对此,基于分形理论表征与重构基板带钢表面微观形貌;基于广义Maxwell模型试验建立聚合物膜的黏弹性本构关系;建立了考虑基板带钢表面微观形貌的覆膜过程有限元仿真模型,并试验验证了模型的准确性。研究表明,熔融层膜厚主要受基板带钢初始预热温度影响,界面填充率则主…
View article: Anxiety, Depression and Quality of Life in Patients with Chronic Obstructive Pulmonary Disease
Anxiety, Depression and Quality of Life in Patients with Chronic Obstructive Pulmonary Disease Open
Background: Chronic Obstructive Pulmonary Disease (COPD) is a common and frequently occurring disease, which not only has a higher fatality rate, but also leads to loss of labor force and an obvious decrease in the quality of life in the c…
View article: Influence of residual stress on critical rotational speed of circular saw blades with different structures
Influence of residual stress on critical rotational speed of circular saw blades with different structures Open
Circular saw blade is an important tool for wood processing. The controllable residual stress formed by tensioning process has an obvious influence on the critical rotational speed of circular saw blade. With the diversification of circula…
View article: Effect of surface roughness of electroplating chromium coated steel on bonding strength of polymer coated steel
Effect of surface roughness of electroplating chromium coated steel on bonding strength of polymer coated steel Open
The effect of surface roughness of electroplating chromium coated steel on bonding strength of polymer coated steel has been investigated in this paper. The experimental results have shown that the electroplating chromium coated steel with…
View article: Growth Behavior of Interface Microstructure between Stainless Steel and Carbon Steel During Bonding Process
Growth Behavior of Interface Microstructure between Stainless Steel and Carbon Steel During Bonding Process Open
View article: Growth Behavior of Interface Microstructure between Stainless Steel and Carbon Steel During Bonding Process
Growth Behavior of Interface Microstructure between Stainless Steel and Carbon Steel During Bonding Process Open
View article: Variable step-size BDF3 method for Allen-Cahn equation
Variable step-size BDF3 method for Allen-Cahn equation Open
In this work, we analyze the three-step backward differentiation formula (BDF3) method for solving the Allen-Cahn equation on variable grids. For BDF2 method, the discrete orthogonal convolution (DOC) kernels are positive, the stability an…
View article: A Non-Dominated Genetic Algorithm Based on Decoding Rule of Heat Treatment Equipment Volume and Job Delivery Date
A Non-Dominated Genetic Algorithm Based on Decoding Rule of Heat Treatment Equipment Volume and Job Delivery Date Open
This paper investigated the flexible job-shop scheduling problem with the heat treatment process. To solve this problem, we built an unified mathematical model of the heat treatment process and machining process. Up to now, this problem ha…
View article: Microscopic mechanism of the combined magnetic-vibration treatment for residual stress reduction
Microscopic mechanism of the combined magnetic-vibration treatment for residual stress reduction Open
View article: Weighted and shifted BDF2 methods on variable grids
Weighted and shifted BDF2 methods on variable grids Open
Variable steps implicit-explicit multistep methods for PDEs have been presented in [17], where the zero-stability is studied for ODEs; however, the stability analysis still remains an open question for PDEs. Based on the idea of linear mul…
View article: The Influence of the Roll-Laminating Process on the Bonding Quality of Polymer-Coated Steel Interface
The Influence of the Roll-Laminating Process on the Bonding Quality of Polymer-Coated Steel Interface Open
Polymer-coated steel (PCS) is a new type of metal packaging material under development, which has better performance in saving resources, energy, and environmental protection. The lamination process has an important influence on the bondin…