bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the Effect of Current Density on Electrolysis State in a 6kA Praseodymium Electrolyzer
Authors: Gao Peng , Li Zhifeng , Gao Ming , Cai Jianuo , Tao Like 
Published: May 2023

Abstract
Current density is an important index parameter to study the state of rare earth electrolysis, and the lack of simulation modelling of current density in the electrolyzer in the actual process production chain affects the quality of products and the improvement of electrolytic current efficiency. Considering the process parameters in the electrolysis process, the simulation model of the 6kA praseodymium electrolyzer was constructed by using the numerical simulation software COMSOL to improve the electrolysis current efficiency and reduce the electrolysis power consumption. The simulation analysis of the electrolysis process was realized by using the coupled electric-thermal field simulation. The simulation results verified the accuracy of the coupling theory and combined it with the coupling simulation study and verification experiments. It was concluded that the electrolysis environment in the tank was ideal when the cathode current density was in the range of 5.72 A/cm2~6.80 A/cm2. The ratio of anode current density to cathode current density was in the range of 1.37~1.62, the current efficiency was higher than 75%, and the electrolysis power consumption was lower than 200 kW·h·kg−1. The electrolysis efficiency is good.
First-principles study of V-doped TiAlN and TiN coating materials
Authors: Yang JunRu , Lv Hao , Yue YanPing , Zhu Ran 
Published: May 2023

Abstract
In this paper, the unit cell model of V-doped TiN and TiAlN is constructed, and the formation enthalpy of the unit cell and lattice parameters of the doped models are calculated by first principles. The results show that the lattice parameters of TiN and TiAlN unit cells are reduced, and the structure of the unit cell is stable after V is doped into TiN and TiAlN unit cells. The structural stability of the TiN unit cell increases with V doping into the TiN unit cell, while that of the TiAlN unit cell decreases with the increase of V doping into the TiAlN unit cell. The analysis results of unit cell hardness and Mulliken population show that the hardness of TiN and TiAlN coating materials is improved by doping V and that hardness increases with the increase of V doping. The reason is that V doping into TiN and TiAlN unit cells increases their average bond population. The covalent bonding property of the unit cell is increased, and the interatomic bonding strength of the unit cell is increased, which leads to an increase in the unit cell’s hardness.
Effects of pressure and height on printability for soft materials
Authors: Lin Zening , Hong Yang , Zhu Yiming , Yang Yun , Jiang Tao , Shang Jianzhong , Luo Zirong 
Published: May 2023

Abstract
Extrusion-based printing with soft materials is an additive manufacturing technology, which is widely used in biomedical fields such as skin reconstruction, muscle repair, and cartilage regeneration, etc. Constructing high-precision printed structures and maintaining high cellular bioactivity are key issues in the in vitro construction of tissues and organs using extrusion bioprinting. There are some printing paraments such as pressure, height, nozzle type (eg, length and inner diameter), translational speed, etc. can have a huge influence on the structural fidelity. In this work, we put forward a quantitative test method to evaluate the printing accuracy is influenced by pressure and height. The results show that higher pressure can benefit uniformity (the filament width is equal everywhere), and higher height leads to higher uniformity only in low pressure for paste. This study can provide researchers with the tunning suggestions of printing paraments, which may promote the development of printing accuracy in the future.
Local maximum multi-synchrosqueezing transform for the analysis of time-varying signals
Authors: Wei Dahuan , Huang Kangguang , Huang Huang , Wang Bo , Ao Jingzhu , Deng Liujie , Peng Jiansheng 
Published: May 2023

Abstract
Synchrosqueezing transform (SST) and its improved algorithm are used to process time-varying signals and have been widely developed in the field of signal processing recently. However, processing strong time-varying signals is still a tricky problem. Multisynchrosqueezing transform (MSST) is an excellent time-frequency (TF) analysis technique for processing strong time-varying signals. However, some TF points will not be rearranged using this method. So we propose a new algorithm named local maximum multi-synchrosqueezing transform. The method detects the local maximum of MSST to address the problem existing in MSST. In this way, a near-perfect TF analysis method used to analyze time-varying signals is generated. Simulated signal and experimental data demonstrate the effectiveness of our method.
Design and Analysis of the Differential Pump Driven by the Novel Eccentric Non-Circular Gears
Authors: Zhao Huacheng , Liu Zheng 
Published: May 2023

Abstract
In order to obtain a better driving mechanism of the differential pump, a high-performance differential velocity vane pump was presented. The pump was driven by the novel eccentric non-circular gears. The working principle and structure of the differential pump were studied. The transmission mechanism of the high-order multisegment deformed eccentric non-circular gears were established, then the transmission characteristics were discussed. Finally an example was given. The example showed that the high-order multisegment deformed, eccentric non-circular gears could meet the large displacement requirements of the differential velocity vane pump.
Study on energy-saving quantitative evaluation of hydraulic excavator
Authors: Li Bei , Chen Yanhui , Zang Xiaohui , Jiang Heng , Chen Lichuang , Wei Junmao , Huang Zhengwei 
Published: May 2023

Abstract
The energy-saving of hydraulic excavators is evaluated by two significant indicators: operating efficiency (digging weight per unit time) and fuel consumption (volume of fuel consumed per unit time). These two indicators are only the final test results and cannot quantitatively evaluate the whole operation process of the excavator. In this paper, a complete set of experimental protocols is designed to quantify the energy-saving of the excavator by collecting its attitude data, fuel consumption data, and digging weight data in real-time. By restoring the excavator’s three-dimensional posture through the multi-body dynamics model, the posture corresponding to the energy efficiency of the excavator can be grasped very intuitively, which provides a research direction for optimizing the energy efficiency of the excavator.
In-service detection of high-temperature pressure pipeline welds based on DR technology
Authors: Chen Le 
Published: May 2023

Abstract
High-temperature pressure pipeline is an important medium conveying equipment in industrial production. Due to its high temperature and high-pressure characteristics, it is very important to implement effective in-service detection. This paper focuses on the successful application of X-ray digital imaging detection (DR) technology in the process of leak detection and disposal of petrochemical pipeline flange welds and analyzes the advantages of DR technology for in-service detection of the high-temperature pressure pipeline. Finally, the shortcomings of the current application and further research directions are put forward.
Study on the Stability of a Repair Process for Carbon Fiber Laminates
Authors: Tian Jianfeng , Lu Guofu , Zhang Jinkui , Zhang Yinghong 
Published: May 2023

Abstract
Carbon fiber-reinforced resin matrix composites are often used in the surface structure of helicopters. In the process of flight, the structure often suffers from different degrees of damage due to the influence of the harsh environment. To explore the superiority of the repair method and obtain a good repair process, the intact and damaged carbon fiber composite laminates were prepared in this paper. The damaged specimens were repaired by single-sided double-layer patch bonding. The allowable value of tensile strength of carbon fiber laminates was tested, and the mechanical properties of carbon fiber composite laminates after repair were studied. Combined with the failure mode of the specimen after failure, the results show that the mechanical properties of the repaired specimen can be restored to about 81.9 % of the non-destructive specimen. The single-sided double-layer patch can effectively improve the mechanical properties of the middle loading area. The repair process has high reliability and good stability, which provides a new method for the repair of the composite laminate structure.
Study on Plasma Combustion in Aeroengine Combustor
Authors: Ding Shibin , Wang Qingzhi , Hua Weizhuo 
Published: May 2023

Abstract
To explore the plasma combustion affect the performance of the aircraft engine combustor, 16 components in the aviation kerosene 25-step reaction mechanism on the basis of considering step 9 simplify the plasma reaction mechanism, set up considering plasma electron collision reaction excited state relaxation and excited states participate in the process of chemical reaction kerosene combustion reaction model, The numerical calculation of the combustion process in the combustor is carried out, and the numerical calculation results of the combustion process with or without plasma combustion are compared and analyzed. The results show that the core reaction zone of the combustion chamber fuel is relatively forward under the conventional mechanism condition, and the average temperature of the combustion chamber outlet is 1910K. The temperature and high-temperature zone of the combustor where the plasma mechanism is applied are mainly distributed in the combustor outlet, mixing hole and main combustion hole, and the average temperature is 2050K. Meanwhile, the kerosene combustion efficiency also increases from 82.4% to 90.1%, increasing by about 7.7%. The results show that the addition of a plasma mechanism can deepen the chemical reaction degree of kerosene and release more heat to improve the combustion efficiency of kerosene.
Energy considerations and flow fields over whiffling-inspired wings
Authors: Sigrest Piper , Wu Ella , Inman Daniel J 
Published: May 2023

Abstract
Some bird species fly inverted, or whiffle, to lose altitude. Inverted flight twists the primary flight feathers, creating gaps along the wing’s trailing edge and decreasing lift. It is speculated that feather rotation-inspired gaps could be used as control surfaces on uncrewed aerial vehicles (UAVs). When implemented on one semi-span of a UAV wing, the gaps produce roll due to the asymmetric lift distribution. However, the understanding of the fluid mechanics and actuation requirements of this novel gapped wing were rudimentary. Here, we use a commercial computational fluid dynamics solver to model a gapped wing, compare its analytically estimated work requirements to an aileron, and identify the impacts of key aerodynamic mechanisms. An experimental validation shows that the results agree well with previous findings. We also find that the gaps re-energize the boundary layer over the suction side of the trailing edge, delaying stall of the gapped wing. Further, the gaps produce vortices distributed along the wingspan. This vortex behavior creates a beneficial lift distribution that produces comparable roll and less yaw than the aileron. The gap vortices also inform the change in the control surface’s roll effectiveness across angle of attack. Finally, the flow within a gap recirculates and creates negative pressure coefficients on the majority of the gap face. The result is a suction force on the gap face that increases with angle of attack and requires work to hold the gaps open. Overall, the gapped wing requires higher actuation work than the aileron at low rolling moment coefficients. However, above rolling moment coefficients of 0.0182, the gapped wing requires less work and ultimately produces a higher maximum rolling moment coefficient. Despite the variable control effectiveness, the data suggest that the gapped wing could be a useful roll control surface for energy-constrained UAVs at high lift coefficients.
Development of Bio-based Polybenzoxazine Composite Post : Effect of Glass Fiber Content on Mechanical Properties and Fracture Behaviors
Authors: Mora P , Nunwong C , Rimdusit S , Srisorachatr U , Jampa-ngern S , Jubsilp C 
Published: May 2023

Abstract
This work aims to develop a novel composite post based on bio-based polybenzoxazine reinforced with glass fiber. The bio-based polybenzoxazine (poly(V-fa)) derived from vanillin, furfurylamine and paraformaldehyde, was prepared as polymer matrix in this study. Mechanical property and thermal property influenced by glass fiber contents were evaluated. The numerical simulation was also used to study the response to external applied load of tooth restored with glass fiber-reinforced poly(V-fa) composite posts by finite element analysis. From the results, not only the flexural properties, i.e. flexural strength and flexural modulus, were substantially improved up to 460 MPa and 25.6 GPa, respectively, but thermal properties, i.e. glass transition temperature (Tg) and degradation temperature at 5wt% loss (Td5), of the composites were also enhanced with the reinforcement of glass fiber contents. Furthermore, the restoration of the developed glass fiber-reinforced poly(V-fa) composite post in term of the maximum von Mises stress and deformation areas was predicted via ANSYS program. The experimental and numerical results revealed that the bio-based polybenzoxazine composite reinforced with glass fiber have highly potential to be used as composite posts.
Bacterial cellulose: An eco-friendly low cost biomaterial for dye removal
Authors: Sukphan S , Buapho P , Laingaumnuay N , Jaturapiree P 
Published: May 2023

Abstract
Bacteria cellulose (BC) is a non-toxic, environmentally friendly, and biodegradable material. Additionally, it is a cheap, easily accessible, and renewable resource. It possesses exceptional properties and is widely used in a variety of industries, including textiles, paper manufacturing, food, pharmaceutical, and waste treatment. The purpose of this study was to assess the capacity for bioadsorption of pure BC in its wet and dry forms . After 210 minutes of incubation at 37°C, 120 rpm, wet and dry BC exhibit the maximum decolorization of Crystal violet (100 mg/L) at 62.72% and 71.32%, and Congo red (100 mg/L) at 44.28% and 35.23%, respectively. Additionally, the characterization and kinetic model of BC were investigated in parallel. In summary, the findings of this work imply that the application of BC in bioadsorption of dyes may be a potential and successful method for solving the concerns of environmental pollution in a way that is low-cost, simple, and environmentally friendly.
Theoretical Analysis of High-Harmonic Generation in Silicon Nanotubes
Authors: Summueang C , Suntijitrungruang O , Boonchui S 
Published: May 2023

Abstract
Silicene hexagonal nanotube (Si h-NT) is a one-dimensional periodic system consisting of the rolling silicene layer, a monolayer of silicon atoms. In this research, we explore high-order harmonic generation (HHG) with a strong mid-infrared (IR) field on the single-walled nanotube. Moreover, the electronic intraband and interband dynamics are significantly and especially investigated in order to study the HHG mechanisms thoroughly. We then show and discuss the numerical results of the HHG characteristics from Si h-NT compared with single-walled carbon nanotubes and silicene sheets.
Fabrication and Properties of Gelatin/Dialdehyde Chitosan Films
Authors: Hemsri S , Junwattarunggu N , Rueangsawang W , Aramsrithum S 
Published: May 2023

Abstract
Non-biodegradable petroleum-based packaging film waste has led to a severe environmental pollution and human health problems. Gelatin and chitosan are attractive biopolymers for biomedical and food packaging applications due to biocompatibility, biodegradability, renewability, nontoxicity, and good gas barrier properties. However, disadvantages of the gelatin and chitosan are their low physicochemical stability and poor mechanical properties. In this study, dialdehyde chitosan was synthesized by periodate oxidation to use as a cross-linking agent for gelatin. The effect of the incorporation of the dialdehyde chitosan with 10, 15 and 20 wt% on mechanical and swelling properties as well as wettability of the gelatin films was investigated. The results reveal that the mechanical strength and swelling properties of the gelatin films were improved as an increase in the dialdehyde chitosan content, whereas the addition of the dialdehyde chitosan led to a decrease in water swelling ability in the gelatin films. Moreover, the wettability of the gelatin/dialdehyde chitosan films showed hydrophobic behaviour. Thus, the obtained gelatin/dialdehyde chitosan films as green polymeric products have a potential for food packaging fields.
Development of natural rubber foam by in-house Talalay method
Authors: Klommueang H , Smitthipong W 
Published: May 2023

Abstract
The benefits of natural rubber foams (NRFs), include its buoyancy, sound absorption, supportability, and low weight. Generally, there are two main techniques to produce the NRFs: Dunlop method and Talalay method. The Dunlop technique is a cheap and conventional method, while the Talalay technique is a complicated method (cool down, vacuum and heating process). The objective of this research is to study the difference properties of NRFs between Dunlop and Talalay methods. Both techniques proposed the NRFs with similar foam density values. The mechanical properties of the NRF from in-house Talalay method were lower than those obtained by NRF from Dunlop method, may due to the in-house Talalay method generating the large bubble from the vacuum system. However, the FTIR spectrum of NRFs obtained from both methods showed the same functional groups.
A review on 2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene based organic thin film transistor
Authors: Ndikumana Joel , Kim Jiho , Kim Jun Young , Lee Dongjin , An Kunsik 
Published: May 2023

Abstract
2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (dif-TES-ADT) is a small molecule organic semiconductor that has drawn much interest as an active channel in organic thin film transistors (OTFTs). In particular, the solubility of dif-TES-ADT in numerous solvents and amorphous polymers, its chemical stability, and its ease in processing make it a supreme candidate for high performance devices. This review summarizes the progress in material crystallization and the film formation approach, including the surface treatment of Source/Drain metal electrodes with various self-assembled monolayers and the works on vertical phase segregation derived from blending dif-TES-ADT with various polymers. Electrical and environmental stabilities in dif-TES-ADT-based OTFTs and their origins are summarized. Finally, a discussion on the emerging applications of dif-TES-ADT OTFTs is explored. We believe that the individual effort summarized in this work will shed light on optimizing the electrical performance of dif-TES-ADT-based transistors and reveal their potential qualities, which will be useful to their applications in next-generation high performance organic electronics.
In silico simulation: a key enabling technology for next-generation intelligent surgical systems
Authors: Killeen Benjamin D , Cho Sue Min , Armand Mehran , Taylor Russell H , Unberath Mathias 
Published: May 2023

Abstract
To mitigate the challenges of operating through narrow incisions under image guidance, there is a desire to develop intelligent systems that assist decision making and spatial reasoning in minimally invasive surgery (MIS). In this context, machine learning-based systems for interventional image analysis are receiving considerable attention because of their flexibility and the opportunity to provide immediate, informative feedback to clinicians. It is further believed that learning-based image analysis may eventually form the foundation for semi- or fully automated delivery of surgical treatments. A significant bottleneck in developing such systems is the availability of annotated images with sufficient variability to train generalizable models, particularly the most recently favored deep convolutional neural networks or transformer architectures. A popular alternative to acquiring and manually annotating data from the clinical practice is the simulation of these data from human-based models. Simulation has many advantages, including the avoidance of ethical issues, precisely controlled environments, and the scalability of data collection. Here, we survey recent work that relies on in silico training of learning-based MIS systems, in which data are generated via computational simulation. For each imaging modality, we review available simulation tools in terms of compute requirements, image quality, and usability, as well as their applications for training intelligent systems. We further discuss open challenges for simulation-based development of MIS systems, such as the need for integrated imaging and physical modeling for non-optical modalities, as well as generative patient models not dependent on underlying computed tomography, MRI, or other patient data. In conclusion, as the capabilities of in silico training mature, with respect to sim-to-real transfer, computational efficiency, and degree of control, they are contributing toward the next generation of intelligent surgical systems.
Simultaneous multi-material embedded printing for 3D heterogeneous structures
Authors: Gao Ziqi , Yin Jun , Liu Peng , Li Qi , Zhang Runan , Yang Huayong , Zhou Hongzhao 
Published: May 2023

Abstract
In order to mimic the natural heterogeneity of native tissue and provide a better microenvironment for cell culturing, multi-material bioprinting has become a common solution to construct tissue models in vitro. With the embedded printing method, complex 3D structure can be printed using soft biomaterials with reasonable shape fidelity. However, the current sequential multi-material embedded printing method faces a major challenge, which is the inevitable trade-off between the printed structural integrity and printing precision. Here, we propose a simultaneous multi-material embedded printing method. With this method, we can easily print firmly attached and high-precision multilayer structures. With multiple individually controlled nozzles, different biomaterials can be precisely deposited into a single crevasse, minimizing uncontrolled squeezing and guarantees no contamination of embedding medium within the structure. We analyse the dynamics of the extruded bioink in the embedding medium both analytically and experimentally, and quantitatively evaluate the effects of printing parameters including printing speed and rheology of embedding medium, on the 3D morphology of the printed filament. We demonstrate the printing of double-layer thin-walled structures, each layer less than 200 μm, as well as intestine and liver models with 5% gelatin methacryloyl that are crosslinked and extracted from the embedding medium without significant impairment or delamination. The peeling test further proves that the proposed method offers better structural integrity than conventional sequential printing methods. The proposed simultaneous multi-material embedded printing method can serve as a powerful tool to support the complex heterogeneous structure fabrication and open unique prospects for personalized medicine.