The paper applies a method, which combines the modified FUZZY DANP with the modified FUZZY ARAS, to select the prioritized function improvement plan for surgical light. First of all, the paper reviews the related patent literature and various patent analyses about the product of surgical light, and uses the functional words of the patents to screen out the criteria of product functions, which are divided into six functional fields. The paper takes these six functional fields as the criteria for ...

This study focuses on improving the fatigue safety and structural strength of a rail e-clip in fastening systems under impact, fatigue, and static loads by employing advanced optimization techniques. Using the EN 13146-1, EN 13146-2, and EN 13146-3 testing standards, von Mises stress in the rail e-clip is evaluated via simulations performed in ANSYS/Workbench. Additionally, EN 13146-4 testing simulations assess the fatigue safety factor. The multi-objective optimization problem is solved using a...

A novel dual functional material (DFM) was developed to efficiently convert carbon dioxide into fuel, emphasizing safety, efficiency, and economy. This DFM integrates adsorption and conversion functions, featuring innovative nano-sized nickel (Ni) catalysts and titanium nanotubes (TNT) with a specific surface area of 150.9 m2/g as supports. The bifunctional material comprises MgO as an alkaline CO2 adsorbent and Ni as the methanation catalyst. Compared to TNT-based supports, the new DFM improves...

This study focuses on the hybrid power generation system of Solid Oxide Fuel Cells (SOFC), investigating the impact of integrating different types of external combustion engines (Gas turbine, Organic Rankine cycle, and Stirling engine) on system thermoelectric efficiency after selecting an appropriate reformer. By analyzing the thermoelectric efficiency differences of SOFC systems combined with three types of external combustion engines under various fuel utilization rates, the study evaluates t...

Effective vibration isolation in machinery foundations is essential for reducing structure-borne noise and improving operational performance, particularly in naval, aerospace, and industrial applications. This study investigates the dynamic behavior and vibration isolation performance of a two-stage raft-mounted system. A nine-degree-of-freedom (DoF) mathematical model was developed, considering translational and rotational motions, and analyzed using MATLAB and ANSYS. Modal analysis identified ...

The research on the causes and characteristics of belt deviation in the belt storage units of a telescopic belt conveyors is of significant importance for designing corresponding correction systems to enhance the operational stability and lifespan of the conveyor. This paper analyzes the normal, tangential, and lateral contact forces and restoring forces between the conveyor belt, pulleys, and idlers. Using a multi-body dynamics (MBD) method, a lateral MBD model of the multi-layer, multi-directi...

Being one of the key rotating components of an automobile, the lightweight design and reliability of the wheel directly impact the overall performance of the automobile. When optimizing the lightweight design of the entire wheel system, it is crucial to consider how structural changes affect its fatigue performance, impact resistance, and other mechanical properties. Therefore, a reliability-based lightweight design method is employed to optimize the racing wheel system, ensuring it meets the pe...

For angular contact ball bearings that rotate at high speed and bear combined load and angular de-flection, this paper calculates the microturbine angu-lar contact ball bearing 7000c through quasi-static equations on the basis of Hertzian contact theory, obtains the changes of bearing force and slippage under different axial preload, radial load, inclination angle and speed, and obtains the slip critical curve of ball bearing based on Hirano slip criterion. The re-sults show that angular contact...

In this study, the effect of cold-rolling and annealing on the microstructural and magnetic properties of 79HM permalloy alloy was investigated systematically. The alloy was fabricated in a vacuum environment using a vacuum induction furnace (VIF), and followed by homogenization and cold-rolling processes. The grain size, grain morphology, hardness, chemical composition, and magnetic properties of the resulting alloy were analyzed by various materials characterization techniques, including optic...