Results 41 to 50 of about 784,718 (264)

Fault detection of converter valve based on the combination of fault tree analysis and multi-frequency impedance testing

Frontiers in Energy Research
Converter valves include numerous components in thyristor-level damping, voltage-sharing, and power-tapping circuits, and their complex structure makes it difficult for conventional impedance tests to localize faults beyond qualitative valve-level ...
Xintong Mao, Huilong Zhao, Kangxin Cai, Baitao Zhang, Wei Liu, Zhiwei Liu, Yunfei Liu, Zhihao Xing, Yong Lu, Jianyong Zheng   +9 more
doaj   +1 more source

Investigation of Precise Single-Frequency Time and Frequency Transfer with Galileo E1/E5a/E5b/E5/E6 Observations

Remote Sensing, 2022
With the rapid upgrade of global navigation satellite system (GNSS) single-frequency (SF) receivers and the increasing market demand for low-cost hardware, SF precise point positioning (PPP) technology has been widely applied in the time and frequency ...
Wei Xu, Chao Yan, Jian Chen
doaj   +1 more source

A Multi-Frequency Study of 3C 309.1

, 2003
To be published in the volume "Highlights of Spanish Astrophysics (III), Proceedings of the 5th Scientific Meeting of the Spanish Astronomical Society" of the Astrophysics and Space Science Library (Kluwer), J. Gallego, J. Zamorano, N.
Ros, E., Lobanov, A. P.
openaire   +2 more sources

BMT4me En Español: Multisite Feasibility and Usability Testing of a Spanish‐Language mHealth Adherence Support App for Spanish‐Speaking Caregivers of Children After Hematopoietic Stem Cell Transplantation and Cancer Treatment

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Medication nonadherence during the first 100 days after pediatric hematopoietic stem cell transplantation (HSCT) and during oncology treatment increases risk for complications. BMT4me is a caregiver‐facing mobile health (mHealth) application providing medication reminders, symptom tracking, and note‐taking features to support ...
Micah A. Skeens, Madeline R. Peek, Bianca Franklin, Emre Sezgin, Melissa Beauchemin   +4 more
wiley   +1 more source

Coal seam thickness prediction method based on multi-frequency joint application of channel wave

Meitan kexue jishu
Based on the frequency dispersion theory, the channel wave can inverse the coal seam thickness distribution in mining face and delineate the thin coal area to a certain extent by using a certain frequency or band-pass filter frequency band.
Nianguang QIU, Wenjie JIAO, Mingfang JIN, Hongli ZHAO, Xiaoshuai YAO, Wanpeng ZHANG, Qingbin LI   +6 more
doaj   +1 more source

Colour Sonar: Multi-Frequency Sidescan Sonar Images of the Seabed in the Inner Sound of the Pentland Firth, Scotland

Journal of Marine Science and Engineering, 2016
The backscatter response of a seabed to an incident sonar signal is dependent on the carrier wave frequency: i.e., the seabed is acoustically colourful.
Duncan Tamsett, Jason McIlvenny, Andrew Watts   +2 more
doaj   +1 more source

Multi-Frequency Vector Diffusion Maps

CoRR, 2019
We introduce multi-frequency vector diffusion maps (MFVDM), a new framework for organizing and analyzing high dimensional datasets. The new method is a mathematical and algorithmic generalization of vector diffusion maps (VDM) and other non-linear dimensionality reduction methods. MFVDM combines different nonlinear embeddings of the data points defined
Yifeng Fan, Zhizhen Zhao 0001
openaire   +3 more sources

Inpatient Exposure, Confidence, and Knowledge in Pediatric Hematology/Oncology: Evaluating General Pediatric Residents During 2025 ACGME Curriculum Change

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background General pediatricians often evaluate hematologic and oncologic presentations before subspecialty consultation, yet the 2025 Accreditation Council for Graduate Medical Education (ACGME) pediatric requirements reduce inpatient pediatric hematology/oncology (PHO) time, raising questions about resident readiness.
Colburn Yu, Rohini Jain
wiley   +1 more source

Multi-frequency metasurface carpet cloaks

Optics Express, 2018
Metasurfaces provide an alternative way to design three-dimensional arbitrary-shaped carpet cloaks with ultrathin thicknesses. Nevertheless, the previous metasurface carpet cloaks work only at a single frequency. To overcome this challenge, we here propose a macroscopic metasurface carpet cloak.
Chan, Wang, Yihao, Yang, Qianghu, Liu, Dachuan, Liang, Bin, Zheng, Hongsheng, Chen, Zhiwei, Xu, Huaping, Wang   +7 more
openaire   +2 more sources

Mapping Childhood Cancer Care Services in Oceania: Methodological Lessons From the SIOP Global Mapping Programme

Pediatric Blood &Cancer, EarlyView.
ABSTRACT The International Paediatric Oncology Society Global Mapping Programme aims to collect data on global paediatric oncology services by continent, with Africa and Latin America completed. This study reports on the methodology and lessons learned for Oceania, a unique continent with resource disparity across countries, multiple small island ...
Trisha Soosay Raj, Christy Noble, Amy Gray, Daniel C. Moreira, Jennifer Lowe, Maite Gorostegui, Gwenda Anga, Andrew Soma, Milena Lay Dos Santos, Siobhan Cross, Erin Luttrell, Michael Sullivan, Julie Cayrol, Julia Challinor, Neil Ranasinghe, Jordana McLoone, Claire E. Wakefield   +16 more
wiley   +1 more source