Results 51 to 60 of about 141,707 (269)

Commutator approximants [PDF]

open access: yesProceedings of the American Mathematical Society, 1992
This paper deals with minimizing | | B − ( A X − X A ) | | p ||B - (AX - XA)|{|_p} , where A A and B B
openaire   +2 more sources

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

open access: yesAdvanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Adaptive firing angle compensation control for mitigating DC subsequent commutation failure

open access: yes电力工程技术, 2022
Subsequent commutation failure of the high voltage direct current (HVDC) transmission system has a seriously negative impact on the stable operation of the AC-DC hybrid power grid.
YANG Chengxiang   +5 more
doaj   +1 more source

Adapting to Changing Rainfall and Developing Off‐Farm Employment: Implications for the Adoption of Direct Seeding in Rice Production

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT Rice is the main staple food for more than half of the world's population and the income from rice is an essential source for livelihoods of millions of households. We examine whether direct seed in rice production is an adaptation of rice farmers to rainfall changes and farm labor scarcity.
Manh Hung Do
wiley   +1 more source

Two-channel microwave power switch construction on the basis of electrically active semiconductor structures

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2014
When constructing the fast-acting two-channel microwave switch, it is difficult to use p–i–n-diodes due to inertia of processes in such structures at change of control voltage polarity for providing of deep modulation.
Yu. N. Lavrich   +4 more
doaj   +1 more source

Full-Bridge Converter with Soft Commutation in All Load Range

open access: yesГлобальная ядерная безопасность, 2022
The development of converters with soft commutation improves issues of radiation interference and electromagnetic compatibility, reduce weight and size parameters by increasing efficiency and conversion frequency.
S. A. Baran, G. P. Smetankin
doaj   +1 more source

Spacetime is for SU(2) [PDF]

open access: yes, 2010
The generators of rotations, boosts and translations are built up based on the commutation and anticommutation relations of the fundamental two dimensional representation of SU(2).
Shurtleff, Richard
core  

Epidemiology of Cancer‐Associated Venous Thromboembolism Across the United States

open access: yesAmerican Journal of Hematology, EarlyView.
ABSTRACT Prior epidemiological studies on cancer‐associated venous thromboembolism (VTE) were limited by homogenous patient populations. We leverage Cosmos, a collaborative dataset of Epic electronic health record systems, to conduct an updated evaluation of cancer‐associated VTE in the United States (US).
Barbara D. Lam   +7 more
wiley   +1 more source

Research on the characteristics of multi-infeed DC system with hybrid commutation converter suppressing successive commutation failure

open access: yesInternational Journal of Electrical Power & Energy Systems
In view of the problem of successive commutation failure in multi-infeed direct current systems, this paper investigates the commutation characteristics of hybrid commutation convert technology and its application in mitigating successive commutation ...
Jian Cui   +7 more
doaj   +1 more source

Reliability analysis and reliable operation of three-level ANPC inverter

open access: yesFrontiers in Energy Research, 2023
The three-level active neutral-point-clamped (3L-ANPC) inverters have been widely used in medium-voltage high-power electrical drives. The purpose of this paper is to achieve the reliable operation for 3L-ANPC inverters by reliability analysis and ...
Xiaolin Zheng   +4 more
doaj   +1 more source

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