Results 71 to 80 of about 21,371 (301)
The Journal of Engineering, 2019 The current source converter (CSC)-HVDC system is the key technology for long distance large power transmission. However, the traditional CSC-HVDC has two serious shortcomings: (i) vulnerable to commutation failures; and (ii) not being able to control ...
Haitao Wu +4 more
doaj +1 more source
British Educational Research Journal, EarlyView.Abstract In early childhood education many researchers and professionals across the world have embraced the United Nations Convention on the Rights of the Child's requirement to include young children in decision‐making. In the context of ongoing discussion about young children's capacity to share their views and opinions about matters affecting them ...
Laura Lundy +3 more
wiley +1 more source
The Journal of Engineering, 2018 This study makes a detailed analysis about the influence of AC system fault moments on commutation process of inverter valves and commutation failures. Taking into account the time-varying characteristic of the commutation voltage effective value after a
Jingqiu Zhang +4 more
doaj +1 more source
British Educational Research Journal, EarlyView.Abstract The intersection of economic conditions and early years education has long been debated, particularly where financial constraints shape educational practice and professional realities. Türkiye, characterised by high inflation and structural vulnerabilities in purchasing power parity, provides a critical context for examining how economic ...
Ebru Aydın, Şerif Yüksel
wiley +1 more source
Analysis and Modelling of the Commutation Error
, 2020 A multiscale dynamic analysis of the commutation error, based on the filtering approach is performed. The similarity multiscale hypothesis proposed by Bardina (1983) and extended by Geurts and Holm (2006) to the commutation error is examined in detail ...
Massimo Germano, Markus Klein
core +1 more source
, 2022 The commutation failure of high voltage direct current (HVDC) systems could lead to unstable operation of the alternating current/direct current (AC/DC) hybrid power grid.
Zeyu Cao +5 more
core +1 more source
Addressing racialised awarding gap in higher education: Insights from personal tutors
British Educational Research Journal, EarlyView.Abstract Situated within a wider cross‐institutional research project, this article provides an in‐depth case study of one higher education (HE) institution, focusing on how personal tutors make sense of racialised degree awarding disparities for both undergraduate and postgraduate students, how they perceive their responsibilities, the challenges and ...
Benjamin Ajibade +3 more
wiley +1 more source
Vallis Aurea, 2015 The scientific article analyses theoretical fundamentals of commutation in the region from rural to urban areas, highlights its main reasons and examines some aspects of pendulum migration in the region.
Voloshyna Yulianna
doaj +1 more source
British Educational Research Journal, EarlyView.Abstract Historically, a university education has been seen primarily as a route for the middle classes to achieve professional qualifications while structural barriers have served to restrict entry to individuals from particular demographics. First‐generation students (FGS), often with low socio‐economic backgrounds, face multiple barriers to Higher ...
Helen Williams, Ellen‐Alyssa Gambles
wiley +1 more source
Exergy-Based Energy Efficiency Analysis of the Pneumatic Drive with Controlled Braking and Compressed Air Recuperation [PDF]
Problems of the Regional EnergeticsThe main objectives of the study are to develop a methodology for calculating the energy efficiency of a pneumatic drive with controlled braking and compressed air recuperation based on a three-dimensional CFD model, as well as to optimize the control ...
Rogovyi А., Strizhak M.
doaj +1 more source