bluuebunny/crossref_metadata_2025_split huggingface dataset:
FDA’s role in expediting innovation of bioelectronic implants for vision restoration
Authors: Gabriele Sandrian Michelle , Ng Elvin , Nguyen Tieuvi , Eydelman Malvina 
Published: June 2023

Abstract
Bioelectronic implants for vision restoration are medical devices regulated in the United States by the Food and Drug Administration (FDA). This paper provides an overview of regulatory pathways and related FDA programs for bioelectronic implants for vision restoration, and identifies some of the gaps in the regulatory science of these devices. The FDA recognizes that additional discussion regarding development in this space is needed to further develop bioelectronic implants and ensure that safe and effective technologies are made available to patients with profound vision loss. FDA regularly participates in the Eye and the Chip World Research Congress meetings and continues to engage with important external stakeholders, including through public workshops such as the recent co-sponsored Expediting Innovation of Bioelectronic Implants for Vision Restoration. By participating in forums for discussion of these devices with all stakeholders, especially patients, FDA seeks to encourage advancement of these devices.
Design and Implementation of Complex Tool Quality Traceability System
Authors: Lin Haotian , Zhu Qiang 
Published: June 2023

Abstract
Traditional complex tool manufacturing enterprises have inconsistent data interfaces, low data utilization, and cannot achieve tool quality traceability. In this paper, a tool quality traceability system based on C/S architecture is built, and a tool life cycle database is established according to product requirements, which covers the data content of design, manufacturing, inspection, client and other stages; The data sharing format of multi terminal in complex tool manufacturing process is designed, which can meet the needs of both users and manufacturers of tools; The establishment of the complex tool quality traceability system provides a feasible scheme for big data mining in the manufacturing industry, realizes the data traceability in the whole life cycle of the tool, can quickly locate and analyze the causes of tool quality, forms a data chain with integrity and high inheritance, effectively improves the design cycle and design ability of complex tools, and provides technical support for the high-quality development of the tool manufacturing industry.
Vehicle Braking Stability Analysis Considering Vehicle Structure Parameters Based on CarSim
Authors: Dong Enguo , Li Yajuan , Sun Boli , Zhang Xiaojun 
Published: June 2023

Abstract
Vehicle braking stability performance can improve the safety of vehicle driving during a braking. However, some parameters of vehicle structure impact on the vehicle braking stability, the characteristic law of the relevant parameters on vehicle braking stability is ignored. A simulation model of vehicle is established using the software of CarSim. The vehicle model is included in the driving system, suspension, steering mechanism, braking system. The impact of wheelbase, and the height of centre of vehicle mass on braking stability performance is analysed. The characteristic law of the relevant parameters on vehicle braking stability is concluded. Based on the characteristic law, the ideal vehicle braking stability is obtained by controlling the vehicle braking force of wheel and the steering angle during a braking.
Measurement and Evaluation Method Study of Alignment Deviation of Double-helical Gear
Authors: Xu Weijun , Zhang Yadong , Shen Yunbo , Liu Cheng 
Published: June 2023

Abstract
The alignment deviation of the V-vertex of two symmetrically arranged gears with different rotation directions is a unique geometric parameter of double helical gears, which has an important effect on the vibration, noise, and double helical gear service life. Aiming to more accurately represent the manufacturing accuracy of double helical gears and their transmission performance, this paper proposes the meaning of the v-vertex basis the contact line of tooth surface based on the apex characteristics of double helical gears. First, the mathematical model of tooth flank is established based on gear meshing theory. Secondly, a method for measuring and evaluating the alignment deviation of double helical gear v-vertex (full tooth contact line method) is proposed. Eventually, the validity and convenience of the proposed measurement method are verified by the experiment. Experimental results showed that the total alignment deviation of double helical gears evaluated by the full tooth contact line method is 0.0082 mm, which meets the design requirements in Reference 16. This paper provides a new measurement and evaluation method for the comprehensive and accurate evaluation of double helical gears, which has significant implications for the design and manufacture of high-precision double helical gears.
Research of Non-mechanical Beam Scanning Technology
Authors: Ye Wenyu , Wang Chunyang , Lei Jue , Zhao Jiaojiao , Wei Qinglong 
Published: June 2023

Abstract
Laser beam scanning technology has been widely used in various fields such as LIDAR, photoelectric detection and space optical communication, etc. Mechanical scanning has problems such as inflexibility and low scanning rate. This paper introduces the basic principles of acoustic-optical scanning, electro-optical scanning, optical phased array and MEMS scanning, and analyses the advantages and disadvantages of several scanning methods and the main application scenarios, and finds that the current optical scanning technology is developing towards large scanning angle, high accuracy, fast response and miniaturization, among which the liquid crystal optical phased array and MEMS scanning technology are relatively mature. The scanning angle of the LCD optical phased array can reach ±10°, and the scanning angle of the MEMS can reach 6.6°*4.4°, which has a broad development prospect.
Study on Electrolyte Dissolution Characteristics of GH4169 Super Alloy
Authors: Tang Lin , Xue Runrong , Liu Zhenzhi , Bo Youfeng , Huang Taiqing , Zhou Hezhicheng 
Published: June 2023

Abstract
GH4169 super alloy has a wide application in the field of aeronautics and astronautics, in order to realize the high quality and fast processing of the complex workpieces with electrochemical machining (ECM), we have studied the electrochemical dissolution characteristics of GH4169 super alloy in composite electrolyte, and explored the rule of influence on machining voltage, feed speed, electrolyte pressure for the machining gap (SG), material removal rate (MRR) and surface roughness (Ra). The results showed that under the composite electrolyte of 10%NaCl+16%NaNO3+4%NaClO3, 17.5V machining voltage and the electrolyte pressure 0.8MPa; temperature 30°C, with 1.0mm/min cathode feed speed, achieved high efficiency and high surface quality machining, surface roughness reached to 0.8μm.
Multi-scale Numerical Simulation of Powder Metallurgy Densification Process
Authors: Liu Miao , Cao Yan , Wang Zhijie , Nie Chaorui 
Published: June 2023

Abstract
In order to reduce defects such as pores, gold phases and cracks in powder metallurgy, scholars have studied the densification process of powder metallurgy. Based on the study of the powder metallurgy deformation mechanism, this paper classifies and summarizes the numerical simulation theory and the methods. At present, the numerical simulation of the densification process of powder metallurgy is carried out mainly in macroscopic, mesoscopic and microscopic directions. Macro scale is an application of finite element method based on continuum theory. The meso-scale is an application of the discrete element method based on the discontinuous media theory. Cellular automata simulation is the main numerical simulation method in the microscale. Different modeling theories and methods have their own adaptability and limitations. By combining the numerical simulation theory and the method of various scales, the process of densification of the material can be realized more accurately and accurately.
Research on Aircraft Object Detection Based on Deep Learning
Authors: Liu Qian , Ma YuanKui 
Published: June 2023

Abstract
At present, the hot topic in academia is how to extract information in remote sensing images quickly. According to the existing methods, to identify the aircraft targets in remote sensing images more effectively, the RSOD-Dataset annotated by Wuhan University was selected and constructed into PASCAL VOC format in this paper. Faster R-CNN and YOLOv3 were used to test the dataset respectively, and their underlying network structures are studied and the results are evaluated using four evaluation metrics. It was found that the metrics obtained with YOLOv3 were Pr=94.72%, Re=80.25%, AP=89.45%, and mAP=89.45% while the metrics obtained with Faster R-CNN were Pr=49.00%, Re=68.06%, AP=60.59%, and mAP=60.59%. For the dataset of this paper, YOLOv3 can be used to identify aircraft targets in remote sensing images more effectively.
Establishment of Straight Profile Hourglass Worm under Virtual Reality
Authors: Xiao Bin , Zhu Qiang , Lin Haotian 
Published: June 2023

Abstract
Virtual workpiece is widely used in dynamic simulation and can be imported into the Virtual Gear Measuring Center (VGMC) to be virtually measured. The tooth surface of hourglass worm is complicated, so the dynamic meshing performance is often improved by modification of the tooth surface. The design cycle of traditional tooth surface modification without digital virtual workpiece is long, and the dynamic meshing performance only can be judged by getting meshing spots with sample parts. In this paper, based on the direct digital modeling, the working tooth surface and the non-working tooth surface are processed respectively for the straight profile enveloping worm, and the errors introduced by the turning tool in the modeling process are eliminated. Segmental cutting and inversion methods are proposed to greatly improve the modeling efficiency. By writing software and parameterizing modeling process, the virtual workpiece model of the hourglass worm with controllable accuracy and no holes and redundant faces can be obtained conveniently and quickly. The model can improve the design efficiency and shorten the design cycle.
Manufacturability Analysis and Research of PCB Component Mounting
Authors: Tian Lei , Wang Yixiao , He Chengyu , Mao Minhang , Chen Lulu 
Published: June 2023

Abstract
In the traditional production mode, the disconnection between PCB design and manufacturing leads to many disadvantages such as more design rework, difficult processing, and high cost. To address this issue, this paper achieves manufacturability analysis at the PCB design stage by establishing a manufacturability analysis system for PCB component placement and simulating the placement process of the placement machine on the computer, taking into account the functional and process requirements of PCB board-level circuits simultaneously, so as to facilitate design decisions in the global tendency of the PCB manufacturing system to be optimal.
Condition Monitoring System of Equipment Transportation Process Based on Data Fusion
Authors: Lv Heng , Wang Hongxi , Wang Guanwei 
Published: June 2023

Abstract
In view of the quality and safety problems caused by environmental factors during equipment transportation, a condition monitoring system for equipment transportation process is designed based on STM32. The system combines the positioning module, motion acquisition module, clock module and storage module to collect, screen and store the motion parameters of the equipment during transportation in real time, and collect the position parameters at a fixed time. The system uses the weighted D-S evidence theory to conduct multi data fusion processing for the stored motion parameters, comprehensively evaluate the transportation status of the equipment during transportation, and the GSM communication module sends the results of multi data fusion processing in real time to reduce the amount of data communication. The simulation experiment results show that the system can realize real-time monitoring and storage of effective motion parameters of equipment during transportation, and effectively save storage space; Multi data fusion algorithm is used to comprehensively evaluate the status of the whole process of equipment transportation and communicate in real time.
Multi-field Coupling Analysis of Electrolytic Machining of Magazine Mounts Based on COMSOL
Authors: Wang Mingkai , Fan Qingming , Zhang Chuanyun , Wang Yubian 
Published: June 2023

Abstract
In electrolytic processing, the flow field of the electrolyte, the applied voltage, and the magnetic effect of the current itself have a significant effect on the stability, efficiency, and surface quality of the process. In this paper, the effects of different inlet pressures on the flow rate and different treatment voltages on the current density and magnetic induction strength are investigated by coupling several fields, such as flow, electric and magnetic fields, using COMSOL software. The simulation results show that the flow rate increases with the increase of inlet pressure, and the flow rate increases by 1 m/s for every 0.1 MPa. The current density increases with the increase of processing voltage, but its uniformity decreases, and the magnetic effect of the current itself also influences the magnitude of the current density
Research of Gantry Frames of Different Materials Based on ANSYS Workbench
Authors: Zeng Mingyuan , Cao Yan , Yang Qixin 
Published: June 2023

Abstract
According to the production requirements of a packaging production line in a distillery, this article designed a suction tray gantry with a width of 1922mm, a length of 5000mm, and a height of 940mm using Solidworks software. Through ANSYS Workbench, the performance advantages and disadvantages of the gantry made of structural steel and aluminum alloy under the maximum load of 100Kg required by the enterprise are analyzed. Finally, through the comparison of their stress, total deformation, and total weight, it is concluded that the total weight of the gantry made of aluminum alloy material is about 660kg lighter than that of the gantry made of structural rigid material when the difference between the stress and total deformation is not significant, and the cost is cheaper. Therefore, the aluminum alloy material is finally selected to make the gantry.
Compressor fouling detection by image analysis
Authors: Suman A , Zanini N , Pinelli M 
Published: June 2023

Abstract
Gas turbine fouling is commonly known as responsible for performance degradation in terms of compression ratio and efficiency. The adhesion of micro-sized particles (soil, soot, salt, etc.) caused the modification of the blade shapes and the surface roughness. Both of these two effects determine the modification of the compressor performance over the unit operation. Due to the lack of capability to forecast the fouling intensity, it could be useful to estimate the fouling intensity during the machine overhaul, collecting strategical data by which a specific characterization of a given machine in a given operating site can be done. The present paper proposes and validates a helpful methodology for estimating the deposit intensity by an image analysis procedure. An image-detection technique has been carried out before and after the contamination process, and, using a subtraction process, a quantitative analysis of the fouled regions can be developed. The results show that, with a careful light and camera setup, the intensity of the deposits can be estimated with an acceptable tolerance band, which allows the possibility of collecting quantitative data on compressor deposits during overhaul operations. This generates a valuable starting point for predicting the overtime degradation of the unit and/or estimating the filtration section efficiency.
A new experimental test rig for performance analysis of radial compressors inside innovative heat pumps
Authors: Ferrando M , Reboli T , Purushothaman S , Traverso A , Halbe C 
Published: June 2023

Abstract
Electrification is playing a major role in the industrial and energy sector, with heat pump (HP) market expected to grow significantly in the next future in accordance with the current energy transition phase, which aims to reduce the utilization of fossil fuels for heat production sector. It is therefore of crucial importance to find new ways to increase heat pump performance and reliability, containing maintenance costs. The use of dynamic compressors in HPs makes it possible to combine good performance with high compactness and silent operation, but unlike the volumetric compressor, this equipment could undergo dangerous instability during operation, which can occur in closed-cycle configuration, quite unusual for dynamic compressors. The aim of this paper is to present a new test-rig for stable and unstable performance analysis of dynamic compressors for innovative heat pumps. An in-depth description of the plant and instrumentation system is provided. The performance of the compressor is analyzed for different operating points, with a particular focus on near-surge operation. Experimental uncertainties and their reduction through data reconciliation techniques is thoroughly investigated.
Thermal performance investigation of metal foam heat exchanger for micro-gas turbine
Authors: Chatzi P , Antoniadou A , Efstathiadis T , Kalfas A I 
Published: June 2023

Abstract
This study presents the experimental monitoring of heat transfer performance of metal foams in transient state. Micro gas turbines require a compact recuperator with high effectiveness to achieve higher thermal efficiency. Porous media such as metal and ceramic foams are characterised by high surface-to-volume ratio. They are known to increase heat transfer and potentially can be incorporated in recuperators. Their structure is ideal for thermal management of compact and lightweight applications. The idea is to combine excellent thermal properties of metal foams with turbine gases heat fluxes exploitation, in order to elevate the temperature of a different working fluid such as water or compressed air before it enters the combustor. A novel facility was designed and developed for monitoring heat transfer mechanisms that occur in metal foams. A copper cylinder is filled with metal foam which is heated in transient state by a sudden switch from cold to hot water flow whereas a cold stream cools the device in a crossflow configuration. The study demonstrates a method based on computerisation of true-colour analysis of digital images for surface temperature visualisation using thermochromic liquid crystals (TLC). Results of temperature as well as local and mean heat transfer coefficient were obtained showing that the hot flow inside the foam was more dominant in heat transfer than the cold flow in the empty channel. The method is promising for the evaluation of transient phenomena in a tube that is filled with porous media.
Experimental Analysis of Partial Evaporation Micro-ORC for low-temperature Heat Recovery
Authors: Ottaviano S , Poletto C , De Pascale A , Bianchi M 
Published: June 2023

Abstract
In this paper, we present an experimental assessment of the performance of a partial evaporating organic Rankine cycle (PE-ORC) power system. The system converts low temperature heat into electrical energy, with a power size around 1 kW, thus suitable for micro-generation in the residential sector. Although the test bench was designed for operating with superheated vapour at the expander inlet, it has demonstrated to be able to work with the expansion occurring entirely in two-phase condition. Since the direct measurement of the vapour quality is not possible using the sensors installed in the test rig, the state of the fluid in the two-phase condition is estimated by means of the thermal balance at the heat exchangers, so the thermodynamic cycle can be evaluated. Temperatures of the heat source in the range between 40 °C and 75 °C have been tested, and for each temperature value the vapour quality at the expander inlet has been varied by regulating the feed-pump rotating speed. Experimental data are provided regarding the performance of the overall cycle, of the heat exchangers, of the expander and of the feed-pump. It was observed that the effectiveness of the evaporator and the efficiency of the pump are improved with respect to the operation with superheated vapour at the expander inlet. However, the overall performance is lower, especially due to the high ratio of the pump consumption over the expander produced power, commonly called back work ratio (BWR). The latter, under some boundary conditions, has resulted higher than the unit, meaning that the system is not able to produce net electrical power. The aim of the paper is to identify the design characteristics required by a micro-ORC energy system in order to enhance its performance in the PE operating mode.
PythonDAQ – A Python based measurement data acquisition and processing software
Authors: Jäger D , Gümmer V 
Published: June 2023

Abstract
This paper introduces PythonDAQ, an open-source Python package for measurement data acquisition, visualization, storage, and post-processing. The code is capable of acquiring measurement data from any sensor with digital data output, performs online calculations, and stores the measured and computed data. A client for live data visualization and tools for postprocessing are also contained in the software package. First, the code is introduced explaining the software architecture and the currently implemented features. Then, the usability is demonstrated by an application at the low-speed compressor test rig FRANCC. As last step, comparisons between PythonDAQ and commercial DAQ solutions, as well as the data acquisition software of a major aero-engine manufacturer are made.
Instrumentation Interference in a Transonic Linear Cascade
Authors: Lopes G. , Simonassi L. , Torre A.F.M. , Lavagnoli S. 
Published: June 2023

Abstract
A major challenge when testing high-speed flows in turbomachinery applications concerns instrumentation intrusiveness. The current work exposes the impact of aerodynamic probes, placed upstream and downstream of the testing article, on the aerodynamics of a transonic low-pressure turbine blade investigated in a linear cascade at engine-representative outlet Mach and Reynolds numbers. The effect of a probe placed downstream of the cascade can be perceived as far as to the inlet of the cascade. The quantification of the probe impact is presented on the blade loading as well as on the instrumentation placed upstream and downstream of the cascade used to monitor the operating conditions during testing. It is shown that the presence of the probe can be partially compensated. The impact of this aerodynamic compensation on the cascade loss is reported.
Redesign of a closed-loop high-speed facility to test distortion generators
Authors: Payyappalli Manas , Boufidi Elissavet , Toracchio Riccardo , Fontaneto Fabrizio 
Published: June 2023

Abstract
Aircraft engine architectures are currently in the phase of a change to meet future market demands. Certain such novel architectures force engines to operate under distorted inflow conditions, which are undesirable during flight. It is important to characterize the effect of such inflow distortions in order to understand the impact on the performance of engine components. This paper discusses the design and development of a novel test-facility that has the capability to test combined total pressure and swirl distortion generators under desired flow conditions. The return duct of the high-speed closed-loop compressor rig R4 at the von Karman Institute for Fluid Dynamics (VKI) has been redesigned to incorporate a test-section where distortion generators can be tested and characterized. Thus, a compressor test-rig is modified to act also as a wind tunnel capable of testing distortion generators at engine-like conditions.