Results 81 to 90 of about 3,601 (202)

Power loss analysis and measurement of a high efficiency DC-DC converter for EV traction AC drives [PDF]

open access: yes, 2000
Previous works have shown the power design effectiveness of novel H-bridge-based DC-DC boost conversion structure, as well as the feasibility of real-time DC-link voltage adaptation to inverter load, in battery-supplied AC motor drives.
Fratta, Antonino   +3 more
core   +1 more source

A handheld high-sensitivity micro-NMR CMOS platform with B-field stabilization for multi-type biological/chemical assays [PDF]

open access: yes, 2016
We report a micro-nuclear magnetic resonance (NMR) system compatible with multi-type biological/chemical lab-on-a-chip assays. Unified in a handheld scale (dimension: 14 x 6 x 11 cm³, weight: 1.4 kg), the system is capable to detect<100 pM of ...
Heidari, Hadi   +5 more
core   +1 more source

Advances in Triboelectric Nanogenerators With Rotating Structure

open access: yesCarbon Energy, EarlyView.
The rotating TENG has been widely studied for its superiorities of simple structure, high efficiency, and stable output. This review introduced the four different principles of rotating TENG and offered a thorough summary for performance and application research through three‐level classification. Importantly, the current existing problems, challenges,
Chuguo Zhang   +4 more
wiley   +1 more source

Evaluation of Magnetic Materials for Very High Frequency Power Applications [PDF]

open access: yes, 2011
This paper investigates the loss characteristics of RF magnetic materials for power conversion applications in the 10 to 100 MHz range. A measurement method is proposed that provides a direct measurement of an inductor quality factor QL as a function of ...
Cheung, Grace   +4 more
core   +1 more source

Photocatalytic Oxygen Evolution with Prussian Blue Coated ZnO Origami Core‐Shell Nanostructures

open access: yesChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Prussian Blue and its derivative hold significant potential for photocatalytic oxygen evolution. IN this contribution the photocatalytic oxygen evolution reaction (OER) was characterized using a hybrid catalyst consisting of Prussian Blue coated ZnO nanostructures. The resulting heterojunction, which was characterized both structurally and functionally,
Ruby Phul   +9 more
wiley   +1 more source

A Survey, Classification and Critical Review of Light-Emitting Diode Drivers [PDF]

open access: yes, 2015
Based on a survey on over 1400 commercial LED drivers and a literature review, a range of LED driver topologies are classified according to their applications, power ratings, performance and their energy storage and regulatory requirements.
Hui, SYR   +5 more
core   +1 more source

Computational design of two‐dimensional MA2Z4 family field‐effect transistor for future Ångström‐scale CMOS technology nodes

open access: yesInfoMat, EarlyView.
Two‐dimensional MA2Z4 such as MoSi2N4 offer a new path to extend transistor scaling beyond the limits of silicon. Due to their exceptional properties, these 2D semiconductors are promising candidates for future Ångström‐scale CMOS technology. This review outlines the computational design and roadmap bridging materials discovery, device design and ...
Che Chen Tho   +11 more
wiley   +1 more source

Electrical performance characteristics of high power converters for space power applications [PDF]

open access: yes
The first goal of this project was to investigate various converters that would be suitable for processing electric power derived from a nuclear reactor.
King, Roger J., Stuart, Thomas A.
core   +1 more source

Ch‐Ch‐Ch‐Ch‐Changes: The Impact of Supply Base Growth, Contraction, and Turnover on Firm Innovation

open access: yesJournal of Operations Management, EarlyView.
ABSTRACT Modern supply chains are experiencing more disturbances due to regulatory shifts, rising sustainability standards, emerging or declining markets, and disruption to critical inputs. Some firms react by strengthening existing supplier partnerships to resist changes, while others reconfigure relationships with suppliers to embrace changes ...
Jordan M. Barker   +3 more
wiley   +1 more source

Implementation of a hybrid AC-AC direct power converter with unity voltage transfer [PDF]

open access: yes, 2008
This paper presents a novel hybrid direct power converter (HDPC) which overcomes the two main disadvantages of matrix converters: limited voltage transfer ratio and low immunity to grid disturbance.
Klumpner, Christian   +3 more
core   +1 more source

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