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Digital Generating Method For Pure-Rolling Spiral Bevel Gears Based On Indexable YW-Type Milling Cutter

This paper proposes a digital generating method for pure-rolling contact logarithmic spiral bevel gears using a fixed, rotating YW-type indexable milling cutter on five-axis CNC machines, which integrates parabolic transmission error modification to achieve high-precision, low-noise machining with minimal deviation and improved contact characteristics.

Rulong Tan, Yang Liu, Weiqing Zhang, Wangwang Wang, Kai Xu, Feng Xiong2026-07-27
📄 other

Controlled Time-Series Proxy for Waterflooding Optimization

This paper presents a rigorously validated engineering workflow that integrates Bayesian optimization, genetic algorithms, and NPV-aware regularization to transform LSTM-based time-series proxies into reliable decision-support tools for waterflooding optimization, demonstrating that predictive accuracy alone is insufficient to guarantee economic returns and emphasizing the necessity of high-fidelity simulator re-evaluation.

Alexandre de Souza Junior, Juan A. R. Tueros, Leonardo C. Oliveira, Silvana M. B. Afonso, Bernardo Horowitz2026-07-27
📄 other

Adaptive Graph Construction and Feature-Enhanced Graph Neural Network for Few-Shot Bearing Fault Diagnosis under Variable Conditions

This paper proposes AG-MS-GNN, a novel few-shot bearing fault diagnosis framework that integrates adaptive physical graph construction, negative-sample-free contrastive feature enhancement, and multi-scale graph attention to achieve high-accuracy, generalizable diagnosis under variable operating conditions with limited data.

Zhi Sun, Xiaoyu Deng, Chunlin Zhang, Yibo Luo, Jinglei Zhao2026-07-27
📄 other

Effect of Cutting Edge Preparation by Abrasive Brushing on End Mill Wear and Surface Quality of Aisi P20 Steel

This study demonstrates that optimizing pneumatic abrasive brushing parameters, particularly using silicon carbide micro-abrasives, effectively engineers precise cutting edge microgeometries on carbide end mills, resulting in a 21% increase in tool life and improved surface quality when milling AISI P20 steel.

Wiliam Buckell, Luccas Augusto Pedrassani Delgado, Rodrigo Panosso Zeilmann2026-07-27
📄 other

Data-Driven Flight Dispatch Systems for Enhancing Operational Efficiency and Risk Management in Airline Operations

This paper demonstrates that the integration of data-driven technologies into airline flight dispatch systems significantly enhances operational efficiency, safety, and fuel economy by replacing traditional manual workflows with predictive analytics and automated risk assessment, resulting in measurable reductions in processing time, fuel consumption, and weather-related delays.

Jamil Akhtar, Sakir Alim2026-07-27
📄 other

Equivalent Roughness Height for CFD Studies on NACA Airfoils

This paper proposes a procedure to estimate equivalent sand-grain roughness height from surface particle coverage for NACA airfoils and evaluates the accuracy of various turbulence models with roughness corrections in predicting aerodynamic performance under complex pressure gradients, addressing the limitations of existing canonical-flow-based calibrations.

Alexis De Urraza, Juan M. Torres Zanardi, Ana Scarabino, Federico Bacchi2026-07-27
📄 other

Mechanism and control of strong ground pressure in shallow buried ultra-large mining height working face with directly overlying double key strata

This study investigates the mechanism of strong ground pressure in shallow buried ultra-large mining height faces with double key strata through field observation and simulation, establishing a theoretical support resistance model and demonstrating that hard roof pre-splitting effectively reduces fracture intervals and stress concentration to ensure stable mining conditions.

Zekun Wang, Hualei Zhang, Chuanming Li, Jiangbin Liu2026-07-25
📄 other

From the Canadian Shield to the Andes: Solid-State Battery LHD Loaders as a Lever for Deep-Mine Ventilation Decarbonization and Their Extension to Peruvian Public Mobility

This paper proposes a four-phase implementation protocol for deploying solid-state battery LHD loaders in Peruvian underground mines to achieve significant ventilation energy reductions by adapting Canadian Shield technologies, while also extending this electrification framework to Peru's public transport sector.

Paul Ricardo Prudencio Galvez¹2026-07-25