Results 51 to 60 of about 42,783 (242)

Cooling Strategies for Greenhouses in Summer: Control of Fogging by Pulse Width Modulation [PDF]

, 2008
The possibilities for improving the control of greenhouse fogging systems, were studied by comparing several combinations of ventilation cooling techniques, shade screening and low-pressure fogging.
A. Perdigones, A. Rodríguez, A. Romero, Albright, Arbel, Arbel, Arbel, Boulard, C. Raposo, Carpenter, Giacomelli, Hanan, J.L. García, Katsoulas, Kittas, Kittas, L. Luna, Luchow, Montero, Perales, Perdigones, Perdigones, S. de la Plaza, Seginer, Öztürk   +24 more
core   +2 more sources

Integration of Soft‐Robotics and Deep Learning to Assess the Coordinated Biosonar Emission and Reception Dynamics in Hipposiderid Bats

Advanced Robotics Research, EarlyView.
Combining a biomimetic soft‐robot with deep‐learning data analytics sheds light on a unique peripheral dynamics seen in the biosonar system of bats: Bats modulate their ultrasonic biosonar signals upon emission as well as reception with variable, yet highly coordinated motion patterns of their noseleaves and pinnae.
Shuxin Zhang, Ruihao Wang, Xiaoyan Yin, Luhui Yang, Rolf Müller   +4 more
wiley   +1 more source

Interleaved Pulse Width Modulation Based on Modified Carrier in Parallel Operation

IEEE Access, 2021
An interleaved pulse width modulation (PWM) can be employed in a parallel operation of three-phase converters because the interleaved PWM increases the equivalent switching frequency and significantly enhances the output current harmonics.
Hyun-Sam Jung
doaj   +1 more source

Analysis and mitigation of dead time harmonics in the single-phase full-bridge PWM converters with repetitive controllers [PDF]

, 2018
In order to prevent the power switching devices (e.g., the Insulated-Gate-Bipolar-Transistor, IGBT) from shoot through in voltage source converters during a switching period, the dead time is added either in the hardware driver circuits of the IGBTs or ...
Blaabjerg, Frede, Wang, Huai, Yang, Yongheng, Zhou, Keliang   +3 more
core   +2 more sources

Gait Analysis of Pak Biawak: A Necrobot Lizard Built using the Skeleton of an Asian Water Monitor (Varanus Salvator)

Advanced Robotics Research, EarlyView.
Pak Biawak, a necrobot, embodies an unusual fusion of biology and robotics. Designed to repurpose natural structures after death, it challenges conventional boundaries between nature and engineering. Its movements are precise yet unsettling, raising questions about sustainability, ethics, and the untapped potential of biointegrated machines.
Leo Foulds, Donan Satria Yudha, Parvez Alam   +2 more
wiley   +1 more source

SiGe high-frequency pulse-width modulation for low-noise applications

e-Prime: Advances in Electrical Engineering, Electronics and Energy
This paper details the first-known experimental observation of pulse-width modulation at 100 MHz using silicon-germanium HBT technology. By performing pulse-width modulation (PWM) at a higher frequency, undesired harmonic-components—which are interpreted
John Suarez
doaj   +1 more source

Compliant Pneumatic Feet with Real‐Time Stiffness Adaptation for Humanoid Locomotion

Advanced Robotics Research, EarlyView.
A compliant pneumatic foot with real‐time variable stiffness enables humanoid robots to adapt to changing terrains. Using onboard vision and pressure control, the foot modulates stiffness within each gait cycle, reducing impact forces and improving balance. The design, cast in soft silicone with embedded air chambers and Kevlar wrapping, offers durable,
Irene Frizza, Hiroshi Kaminaga, Philippe Fraisse, Gentiane Venture   +3 more
wiley   +1 more source

Navigating the Ethereal Tightrope: The Nanogenerator Manipulates Neurons for Immune Equilibrium

Advanced Science, EarlyView.
This review explores how nanogenerators modulate neuroimmune responses, offering innovative strategies for treating neurological disorders. By interfacing with neural pathways, they enable precise control of immune activity, especially via vagus nerve stimulation.
Jia Du, Rui Deng, Ya Wu, Hong‐Xia Ren, Zong‐Hong Lin, Yang‐Bao Miao   +5 more
wiley   +1 more source

VSG Control for Cascaded Three-Phase Bridge Based Battery Inverter

World Electric Vehicle Journal, 2023
With the increasing number of new energy sources connected to the grid, the unbalanced output of three-phase grid-connected inverters and the lack of no inertia and damping characteristics in the traditional microgrid control system will seriously affect
Xiaojing Qi, Jianyong Zheng
doaj   +1 more source

Improvement of electromagnetic compatibility of motor drives using hybrid chaotic PWM [PDF]

, 2011
Title in Conference Program: Improvement of electromagnetic compatibility of motor drives using hybrid chaotic PWMSession FZ: Magnetoimpedance, High Frequency Materials and Electromagnetic Compatibility: FZ-09This paper proposes and implements a new ...
Chau, KT, Li, W, Wang, Z, Zhang, Z
core   +1 more source