Results 91 to 100 of about 508,346 (348)

Research on load adaptive impedance matching of magnetic resonant wireless power transfer system

open access: yesGong-kuang zidonghua, 2020
In view of problem that current impedance matching methods ca't automatically adjust load impedance of magnetic resonant wireless power transfer system(MR-WPT) when load changes, which leads to reduction of energy transfer efficiency of the system, a ...
BAI Jingcai   +3 more
doaj   +1 more source

A study of Schwarz converters for nuclear powered spacecraft [PDF]

open access: yes
High power space systems which use low dc voltage, high current sources such as thermoelectric generators, will most likely require high voltage conversion for transmission purposes.
Schwarze, Gene E., Stuart, Thomas A.
core   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

open access: yesAdvanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky   +3 more
wiley   +1 more source

Intrinsic DC‐Bias‐Free Control for Dual Active Bridge DC‐DC Converters Based on Zero Initial Current Switching Sequence Construction

open access: yesIET Power Electronics
The dual active bridge (DAB) converter is an important interface in power conversion for modern power systems, and it is essential to ensure its efficient and reliable operation.
Lei Xu   +4 more
doaj   +1 more source

Improving Electricity Efficiency by DC Power Transmission: A Case Study in Vietnamese Mining [PDF]

open access: diamond, 2023
Nguyen Truong Giang   +4 more
openalex   +1 more source

Performance analysis of radiation cooled dc transmission lines for high power space systems [PDF]

open access: yes
As space power levels increase to meet mission objectives and also as the transmission distance between power source and load increases, the mass, volume, power loss, and operating voltage and temperature become important system design considerations ...
Schwarze, G. E.
core   +1 more source

An Ultrafast Self‐Gelling Versatile Hydrogel for Rapid Infected Burn Wound Repair in Military Medicine

open access: yesAdvanced Functional Materials, EarlyView.
A self‐gelling PG@PAC (POD/Gel‐CDH@PA/CHX) powder is developed for infected burn care in austere settings. Upon contact with wound exudate, it instantly forms an adhesive hydrogel, providing simultaneous hemostasis, broad‐spectrum antibacterial activity, reactive oxygen species scavenging, and immunomodulation. In a murine model of S.
Liping Zhang   +14 more
wiley   +1 more source

Microwave Power Transmission System Studies. Volume 1: Executive Summary [PDF]

open access: yes
A study of microwave power generation, transmission, reception and control was conducted as a part of a program to demonstrate the feasibility of power transmission from geosynchronous orbit. A summary is presented of results concerning design approaches,
Brown, W. C.   +6 more
core   +1 more source

Magnetic Force Microscopy Signatures of Higher‐Order Skyrmions and Antiskyrmions

open access: yesAdvanced Functional Materials, EarlyView.
Magnetic force microscopy operated under vacuum conditions enables the qualitative identification of higher‐order skyrmions and antiskyrmions in Co/Ni multilayers at room temperature. Distinct stray‐field contrast signatures arise from vertical Bloch lines and complex domain‐wall configurations.
Sabri Koraltan   +8 more
wiley   +1 more source

Application of new bidirectional DC/DC converter in uninterruptible power supply system

open access: yesDianzi Jishu Yingyong, 2018
In order to solve the uninterruptible power supply in the power flow of the uneven distribution and raising and reducing capacity problems, based on the bidirectional Buck-Boost DC/DC converter on the traditional topology from begin to research, a new ...
Fang Xupeng, Zhao Yang, Yu Zhixue
doaj   +1 more source

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