Results 41 to 50 of about 85,109 (98)

Improved DC and RF Characteristics of GaN HEMT Using a Back-Barrier and Locally Doped Barrier Layer

Micromachines
To enhance the DC and RF performance of AlGaN/GaN HEMTs, a novel device structure was proposed and investigated through simulation. The key innovation of this new structure lies in the incorporation of an Al0.7In0.15Ga0.15N back-barrier layer and an N ...
Shuxiang Sun, Lulu Liu, Gangchuan Qu, Xintong Xie, J. Ajayan   +4 more
doaj   +1 more source

Long-term real-time chemical characterization of submicron aerosols at Montsec (southern Pyrenees, 1570 m a.s.l.)

, 2014
. Real-time measurements of inorganic (sulfate, nitrate, ammonium, chloride and black carbon (BC)) and organic submicron aerosols (particles with an aerodynamic diameter of less than 1 μm) from a continental background site (Montsec, MSC, 1570 m a.s.l ...
A. Ripoll, M. Minguillón, J. Pey, J. Jimenez, D. Day, Y. Sosedova, F. Canonaco, A. Prévôt, X. Querol, A. Alastuey   +9 more
semanticscholar   +1 more source

Research and Overview of Crop Straw Chopping and Returning Technology and Machine

Machines
Crop straw chopping and returning technology has gained global implementation to enhance soil structure and fertility, facilitating increased crop yield.
Peng Liu, Chunyu Song, Jin He, Rangling Li, Min Cheng, Chao Zhang, Qinliang Li, Haihong Zhang, Mingxu Wang   +8 more
doaj   +1 more source

An Improved Adaptive Car-Following Model Based on the Unscented Kalman Filter for Vehicle Platoons’ Speed Control

Machines
This study proposes an adaptive car-following model based on the unscented Kalman filter algorithm to enable coordinated speed control in vehicle platoons and to address key limitations present in conventional car-following models.
Caixia Huang, Wu Tang, Jiande Wang, Zhiyong Zhang   +3 more
doaj   +1 more source

Ensemble Learning-Based Metamodel for Enhanced Surface Roughness Prediction in Polymeric Machining

Machines
This paper proposes and demonstrates a domain-adapted ensemble machine learning approach for enhanced prediction of surface roughness (Ra) during the machining of polymeric materials.
Elango Natarajan, Manickam Ramasamy, Sangeetha Elango, Karthikeyan Mohanraj, Chun Kit Ang, Ali Khalfallah   +5 more
doaj   +1 more source

Influence of the Drilling Parameters in the Single-Lip Deep-Hole Drilling Process on the Surface Integrity of Nickel-Based Alloy

Machines
Single-lip deep-hole drilling is a key technology for the precision machining of high-temperature nickel-based alloy pore structures in aero engines.
Tao Wu, Fangchao Zhang, Haoguang Zhou, Dong Zhang   +3 more
doaj   +1 more source

Human–Seat–Vehicle Multibody Nonlinear Model of Biomechanical Response in Vehicle Vibration Environment

Machines
Especially in real-world circumstances with uneven road surfaces and impulsive shocks, nonlinear dynamic effects in vehicle systems can greatly skew biometric data utilized to track passenger and driver physiological states.
Margarita Prokopovič, Kristina Čižiūnienė, Jonas Matijošius, Marijonas Bogdevičius, Edgar Sokolovskij   +4 more
doaj   +1 more source

Three years of aerosol mass, black carbon and particle number concentrations at Montsec (southern Pyrenees, 1570 m a.s.l.)

, 2013
Time variation of mass particulate matter (PM1 and PM1 10), black carbon (BC) and number of particles (N3: number of particles with an aerodynamic diameter higher than 3 nm, and N10: higher than 10 nm) concentra- tions at the high-altitude site of ...
A. Ripoll, J. Pey, M. Minguillón, N. Pérez, M. Pandolfi, X. Querol, A. Alastuey   +6 more
semanticscholar   +1 more source

Nonblocking Modular Supervisory Control of Discrete Event Systems via Reinforcement Learning and K-Means Clustering

Machines
Traditional supervisory control methods for the nonblocking control of discrete event systems often suffer from exponential computational complexity.
Junjun Yang, Kaige Tan, Lei Feng
doaj   +1 more source

Design and Electromagnetic Performance Optimization of a MEMS Miniature Outer-Rotor Permanent Magnet Motor

Micromachines
In this study, we present the design and electromagnetic performance optimization of a micro-electromechanical system (MEMS) miniature outer-rotor permanent magnet motor.
Kaibo Lei, Haiwang Li, Shijia Li, Tiantong Xu   +3 more
doaj   +1 more source