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Ergonomics in product design enhance user comfort, correlating with increased efficiency and usability between the user and the product. Anthropometry is an important part of creating ergonomic design that correlates with human body size. By utilising anthropometry data, this research aims to analyse the cabin's comfort in drilling rig machine by creating 3D simulations for human-machine interaction. The comfort values will be assessed using Jack software. An experimental orthogonal design is applied to generate 81 optimal combination samples. The sample with the optimal comfort value can also be obtained. Following that, the extreme learning machine and mean impact value (ELM-MIV) algorithm is employed to evaluate the comfort weight analysis of each influencing factor. The accuracy value of the prediction model assessed using mean squared error (MSE) is 0.004, and the squared correlation coefficient (R2) value is 0.996. It can be inferred that the prediction error is apparently minimal, indicating the reliability of ELM implementation in data training. It will optimise the redesign of a drilling rig machine cabin to solve work-related health issues and improve operator comfort and efficiency. [ABSTRACT FROM AUTHOR]

High-voltage electric pulse rock-breaking has shown great potential for application in breaking hard rock. However, there has been a lack of research on the design of the hydraulic structure of the electrode bit and the characteristics of the wellbore flow field and cuttings transport. In this paper, the hydraulic structure of the bit was designed, and the cuttings transport model was established based on the computational fluid dynamics–discrete element method. The effects of drilling parameters and hydraulic structure on the flow field and cuttings transport were studied. The results showed that the flow field could be divided into jet impact zone, overflow zone, dead zone, vortex zone, and up-return zone. Vortexes were formed outside the central nozzle. The cuttings formed the circular transport zones and the vertical particle belts during transport, with residuals in the dead zone. The effect of cuttings transport was improved with increased pump volume and drilling fluid viscosity. The increase in pump volume increased the hydraulic energy of the fluid. The increase in drilling fluid viscosity increased the viscous force of the fluid. Reducing the nozzle diameter increased the jet velocity and fluid shear and enhanced the ability of the fluid to suspend and carry cuttings, but the coverage areas were concentrated. The impact of a small nozzle angle was more concentrated, and the low-speed area was large, next only to the dead zone area. The research results had a certain application value for realizing high-voltage electric pulse continuous drilling and electrode bit hydraulic structure design. [ABSTRACT FROM AUTHOR]

A pressing need for enhancing lithium-ion battery (LIB) performance exists, particularly in ensuring reliable operation under extreme cold conditions. All-solid-state batteries (ASSBs) offer a promising solution to the challenges posed by conventional LIBs with liquid electrolytes in low-temperature environments. In this study, leveraging the benefits of amorphous solid-state electrolytes (SSEs) xLi 3 N-TaCl 5 (1 ≤ 3x ≤ 2), we develop ASSBs capable of functioning effectively under extreme cold conditions. The designed ASSBs, employing LiCoO 2 positive electrode with a mass loading of 4.46 mg cm ‒2 and a Li-In negative electrode, demonstrate initial discharge capacities of 183.19, 164.8 and 143.78 mAh g ‒1 under 18 mA g ‒1 at ‒10, ‒30, and ‒40 °C, respectively, and exhibit a final discharge capacity of 137.6 mAh g ‒1 at 18 mA g ‒1 and ‒30 °C in the 100th cycle. Moreover, the ASSBs demonstrate an initial discharge capacity of 51.94 mAh g ‒1 at 18 mA g ‒1 and ‒60 °C with cycling over 200 h., Competing Interests: Competing interests: The authors declare no competing interests., (© 2025. The Author(s).)