Results 1 to 10 of about 80,279 (227)
On the orientation of the pulsar space velocity vector relative to the spin axis [PDF]
Nature, 1977 A SIGNIFICANT parameter for pulsars for which proper motion data are available is the angle φ between the space velocity vector and the spin axis. There are eleven such pulsars (ref. 15 and personal communication from one of the authors). The angle between the spin axis projected on the plane of the sky and the proper motion vector has a value close to
Rajesh Kochhar
openalex +3 more sources
Equivariant orientation of vector bundles over disconnected base spaces [PDF]
Proceedings of the London Mathematical SocietyAbstractIn this paper, we view the equivariant orientation theory of equivariant vector bundles from the lenses of equivariant Picard spectra. This viewpoint allows us to identify, for a finite group , a precise condition under which an ‐orientation of a ‐equivariant vector bundle is encoded by a Thom class.
Prasit Bhattacharya, Foling Zou
openalex +3 more sources
Induction Machine Broken-Bar Fault Diagnosis Using the Rotor Magnetic Field Space-Vector Orientation [PDF]
IEEE Transactions on Industry Applications, 2004 A new technique based on rotor magnetic field space vector orientation is presented to diagnose broken-bar faults in induction machines operating at steady state. In this technique, stator currents and voltages are used as inputs to compute and subsequently observe the rotor magnetic field orientation, which has a more significant "swing-like ...
Behrooz Mirafzal, N.A. Demerdash
+5 more sources
Evaluating putative repellent ‘push’ and attractive ‘pull’ components for manipulating the odour orientation of host-seeking malaria vectors in the peri-domestic space [PDF]
Parasites & Vectors, 2021 AbstractBackgroundNovel malaria vector control approaches aim to combine tools for maximum protection. This study aimed to evaluate novel and re-evaluate existing putative repellent ‘push’ and attractive ‘pull’ components for manipulating the odour orientation of malaria vectors in the peri-domestic space.MethodsAnopheles arabiensisoutdoor human ...
Margaret M. Njoroge +6 more
openalex +8 more sources
A New Approach for Measuring Sentiment Orientation based on Multi-Dimensional Vector Space
, 2018 This study implements a vector space model approach to measure the sentiment orientations of words. Two representative vectors for positive/negative polarity are constructed using high-dimensional vec-tor space in both an unsupervised and a semi-supervised manner.
Youngsam Kim, Hyopil Shin
openalex +4 more sources
Field-Oriented Control of Five-Phase Induction Motor Fed From Space Vector Modulated Matrix Converter [PDF]
IEEE Access, 2022 This paper presents the field-oriented control (FOC) of a five-phase induction motor (FPIM) fed from a three-to-five phase direct matrix converter (DMC). The article focuses on the modulation and control of the three-to-five phase DMC, which discusses minimizing the problems associated with switching vector selection, sector identification, switching ...
Khaliqur Rahman +6 more
openaire +4 more sources
Hierarchies over Vector Space: Orienting Word and Graph Embeddings
, 2022 Word and graph embeddings are widely used in deep learning applications. We present a data structure that captures inherent hierarchical properties from an unordered flat embedding space, particularly a sense of direction between pairs of entities. Inspired by the notion of \textit{distributional generality}, our algorithm constructs an arborescence (a
Guo, Xingzhi, Skiena, Steven
openaire +2 more sources
Alternative Methods of Synchronous Space-Vector PWM for Transport-Oriented Converters and Drives [PDF]
2019 International Conference on Electrical Drives & Power Electronics (EDPE), 2019 This manuscript presents short survey of novel methods, schemes, techniques, and algorithms of feedforward synchronous space-vector modulation elaborated for scalar control of power converters and induction motor drives for transport systems. It includes both description of features and peculiarities of these new modulation strategies, and examples of ...
Vladimir Ermuratskii +2 more
openaire +3 more sources
5-Phase AC induction motor rotor flux oriented control with space vector modulation technique [PDF]
2013 International Conference on Electrical Engineering and Software Applications, 2013 The paper deals with the analysis of the rotor flux oriented control with space vector modulation technique for a five phase induction motor drive. The speed control using the rotor flux oriented control (RFOC) with or without speed sensor uses proportional integral controlled technique which make it possible to achieve satisfactory goals on the torque
Ben Echikh, Hamdi +3 more
openaire +3 more sources
Field Oriented Control of Space Vector Modulated Multilevel Inverter fed PMSM Drive
Energy Procedia, 2017 Abstract In this article, field orient control (FOC) of a space vector modulated asymmetrical Multilevel inverter (MLI) fed Permanent Magnet Synchronous Motor (PMSM) is presented. The MLI considered is a reduced switch inverter which produces seven level output with six power switches and two input sources.
Jose Jacob, A. Chitra
openaire +2 more sources