Zobrazeno 1 - 10
of 86
pro vyhledávání: '"M. Hasegawa"'
Publikováno v:
IEEE Photonics Journal, Vol 7, Iss 3, Pp 1-7 (2015)
We experimentally realize seamless operations with below 100-fs timing jitter in a 10-GSample/s 3-bit photonic analog-to-digital converter (ADC) with an input 2.5-GHz sinusoidal electrical signal. To address the energy efficiency, it is necessary to
Externí odkaz:
https://doaj.org/article/d74b9757eb3e48ebbba0e52f601b2571
Autor:
H. Akatsuka, M. Hasegawa
Publikováno v:
2018 XIII International Conference on Electrical Machines (ICEM).
This paper proposes a torque ripple reduction of IPMSM with concentrated winding based on the adaptive identification of the equivalent torque coefficient. First, a torque ripple estimation method is derived. Next, the torque ripple reduction is prop
Publikováno v:
IEEE Transactions on Speech and Audio Processing. 12(4):409-419
A new method for automatic detection of section boundaries and extraction of key sentences from lecture audio archives is proposed. The method makes use of 'discourse markers' (DMs), which are characteristic expressions used in initial utterances of
Autor:
Shigeo Kawasaki, Y. Kobayashi, T. Suda, R. Funase, O. Mori, G. Fukuda, M. Hasegawa, S. Yoshida
Publikováno v:
2013 IEEE Antennas and Propagation Society International Symposium (APSURSI).
This paper describes a basic characteristic of a 7/8-GHz band circular stacked patch active integrated array antenna (AIAA) unit for solar sail embedding application. The proposed AIAA unit mainly consists of a 2×2 stacked circular patch array, two
Publikováno v:
WCSP
In this paper, approximate calculation of channel log likelihood ratio (LLR) for wireless channels using Pade approximation is devised. Due to the lack of knowledge of the channel state information of a wireless fading channel, such as uncorrelated f
Publikováno v:
2012 XXth International Conference on Electrical Machines.
To extend the speed range in the switched flux permanent magnet (SFPM) machines, mechanically movable flux adjusters (FAs), which consist of iron pieces located outside the stator, are utilized to adjust the airgap flux density. A comparative study o
Publikováno v:
2012 IEEE Energy Conversion Congress and Exposition (ECCE).
Novel topologies of switched flux permanent magnet (SFPM) machines with mechanically movable flux adjusters (FAs) for either all or alternative stator poles in order to extend the operation speed range are developed and analysed in this paper. Compar
Publikováno v:
Proceedings of The 7th International Power Electronics and Motion Control Conference.
The vibration and acoustic noise are investigated in a novel variable flux reluctance machine, which utilizes a DC-field coil in the stator to achieve on-line adjustment of air-gap flux density. The capability of adjusting air-gap flux density is exp
Publikováno v:
ISIE
Vibration and acoustic noise are two critical issues for switched reluctance machine (SRM). The abrupt change of phase current mainly contributes to high vibration and noise under conventional unipolar excitation, sinusoidal bipolar excitation consid
Autor:
K. Kotaka, Y. Hirayama, M. Hasegawa, Yasumitsu Orii, K. Terada, Michael A. Gaynes, T. Nagasaka, Akihiro Horibe, K. Ishikawa, M. Hoshiyama, John U. Knickerbocker, O. Suzuki, Claudius Feger, Katsuyuki Sakuma, T. Sato, H. Yoshii, M.-C. Paquet
Publikováno v:
2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT).
We developed vacuum underfill (VCUF) technology for large die (>18 × 18 mm) with fine pitch area array bumps (< 150 μm pitch) to solve a critical underfill void issue. Material development and process optimization are the keys to realize a stable p