Results 41 to 50 of about 7,085,204 (237)
Advanced Science, EarlyView.This work presents a magnetic‐bearing acoustic resonator that overcomes the thermodynamics limit of sound absorption. By introducing tunable negative stiffness, it achieves broadband low‐frequency absorption within a compact cavity, far exceeding the performance achievable by classic mass‐tuned designs.
Ying Hu +5 more
wiley +1 more source
Volume 2: Control, Monitoring, and Energy Harvesting of Vibratory Systems; Cooperative and Networked Control; Delay Systems; Dynamical Modeling and Diagnostics in Biomedical Systems; Estimation and Id of Energy Systems; Fault Detection; Flow and Thermal Systems; Haptics and Hand Motion; Human Assistive Systems and Wearable Robots; Instrumentation and Characterization in Bio-Systems; Intelligent Transportation Systems; Linear Systems and Robust Control; Marine Vehicles; Nonholonomic Systems, 2013 A control law for an electromagnetic vibration energy harvester is derived using the maximum power transfer theorem. Using regenerative electronics, the controller cancels the reactive portion of the harvester’s impedance by eliminating the effect of mechanical inertia and stiffness elements, and the coil’s electrical inductive element.
Alexander V. Pedchenko, Eric J. Barth
openaire +1 more source
Gap‐Free Information Transfer in 4D‐STEM via Fusion of Complementary Scattering Channels
Advanced Science, EarlyView.Fused Full‐Field STEM (FF‐STEM) is introduced as a 4D‐STEM imaging modality that combines direct ptychography with tilt‐corrected dark‐field reconstruction in a single acquisition. Fourier‐space fusion using Wiener‐type spectral weighting closes the low‐frequency contrast gap inherent to bright‐field methods, delivering gap‐free, dose‐efficient, near ...
Shengbo You +15 more
wiley +1 more source
Data‐Driven Discovery of Unconventional Antiferromagnets
Advanced Science, EarlyView.A high‐throughput workflow that combines the physics‐informed pre‐screening, high‐throughput exchange calculations, Luttinger‐Tisza analysis and symmetry classification is established for accurate identification of unconventional antiferromagnets from the broad structural database.
Qirui Cui +3 more
wiley +1 more source
Bamboo‐Slip‐Inspired Conformal Reconfigurable Metasurfaces
Advanced Science, EarlyView.Bamboo‐slip‐inspired conformal reconfigurable metasurface system. The structure is mainly composed of three parts, which are conformal metasurface, pattern reconfigurable antenna, and control components (such as Field Programmable Gate Array (FPGA)). Conformal metasurfaces draw inspiration from the design of ancient Chinese bamboo slips.
Qifan Li +9 more
wiley +1 more source
AC Thevenin's and Maximum Power Transfer Theorem Examples (Part 1 of 2)
, 2018 This lecture, published by Columbia Gorge Community College, uses illustrated examples to explore "Thevenin's Theorem and the maximum power transfer theorem as applied to AC circuits." The instructor also discusses "several bonus ...
Pytel, Jim
core +1 more source
Integrated PV and multilevel converter system for maximum power generation under partial shading conditions [PDF]
, 2013 The emerging trend towards the harnessing of the electrical power from solar energy has increased the research effort in power electronics applications.
Abdalla, Imadeddin Abdalla
core +2 more sources
Advanced Science, EarlyView.As CMOS technology approaches fundamental energy limits, new paradigms for low‐power information processing are required. Magnetic systems are attractive for their spin transport, yet current‐induced magnetization control is energy inefficient. Multiferroic heterostructures enable energy‐efficient electric field manipulation of magnetism.
Donghyeon Lee +3 more
wiley +1 more source
AC Thevenin's and Maximum Power Transfer Theorem Examples (Part 2 of 2)
, 2018 This lecture, published by Columbia Gorge Community College, uses illustrated examples to explore "Thevenin's Theorem and the maximum power transfer theorem as applied to AC circuits." The instructor also discusses "several bonus ...
Pytel, Jim
core +1 more source
Electronic tuning of misaligned coils in wireless power transfer systems [PDF]
, 2014 The misalignment and displacement of inductively coupled coils in a wireless power transfer system (WPT) can degrade the power efficiency and limit the amount of power that can be transferred.
Whidborne, James F. +2 more
core +1 more source