Results 51 to 60 of about 6,872,512 (287)

18-Pulse rectifier with electronic phase shifting and pulse width modulation

, 2020
At present, 12-pulse rectifiers with electronic phase shift are known. Unlike classic rectifiers, they do not use phase-shifting transformers and have a unit power factor. Increasing of the rectifier’s pulse makes it possible to improve the harmonic composition of the input current.
Sokol, E. I., Zamaruiev, Volodymyr, Ivakhno, Volodymyr, Voitovych, Yurii, Butova, Olha, Makarov, Vadim   +5 more
openaire   +2 more sources

A Comprehensive Approach to Pulse Modulation for Attitude Control with Thrusters Subject to Switching Restrictions [PDF]

, 2005
A pulse modulation scheme based on two modulation curves is proposed for applications in spacecraft attitude control using thrusters which may be subject to switching restrictions.
Bals, Johann, Kienitz, Karl Heinz
core  

Multimode Oxide‐Based Optoelectronic Memtransistor for In‐Sensor Vision Processing

Advanced Functional Materials, EarlyView.
A multimode optoelectronic memtransistor (OEMT) is demonstrated for vision explainable artificial intelligence (VXAI) hardware. By integrating optical sensing, electrical masking, and non‐volatile memory, the device enables key operations required for generating saliency information.
Min Gu Lee, Geunyoung Kim, Hwa Young Kim, Do Hoon Kim, Hanchan Song, Huisu Noh, Jungwan Noh, Seungwoo Lee, Sang‐Hee Ko Park, Himchan Cho, Kyung Min Kim   +10 more
wiley   +1 more source

Multimodal Optoelectronic Synapses for Neuromorphic Intelligence: Coupling Light, Electrical, Thermal, and Beyond

Advanced Functional Materials, EarlyView.
This review revisits optoelectronic neuromorphic devices that extend from unimodal sensing toward multimodal perception. Five types of stimuli‐to‐output information flow that are classified based on the device roles within the system and applications are summarized and discussed.
Jihyun Shin, Junhyung Cho, Wangmyung Choi, Jaehyun Hur, Jae Kyeong Jeong, Ulrike Kraft, Hocheon Yoo   +6 more
wiley   +1 more source

Advances in fibre based pulse shaping technology and its applications in optical communications [PDF]

, 2007
Fibre grating technology can be used to design and fabricate reflective filters with accurately controlled complex phase and amplitude responses and thereby provide a powerful means to reshape short optical pulses in both time and frequency.
Ibsen, M., Petropoulos, P., Parmigiani, F., Tian, C., Richardson, D.J., Almeida, P.J., Ng, T.T., Zhang, Z.   +7 more
core   +2 more sources

Experimental coder/decoder of dicode pulse position modulation. [PDF]

, 2009
Dicode Pulse Position Modulation has been proposed as an alternative coding scheme which has many advantages over previous Pulse Position Modulation formats.
Charitopoulos, Romanos, Sibley, Martin J.N.   +1 more
core   +4 more sources

Five-level selective harmonic elimination PWM strategies and multicarrier phase-shifted sinusoidal PWM: A comparison [PDF]

, 2005
The multicarrier phase-shifted sinusoidal pulse-width modulation (MPS-SPWM) technique is well-known for its important advantage of offering an increased overall bandwidth as the number of carriers multiplied with their equal frequency directly controls ...
Cossar, C., Balouktsis, A., Agelidis, V.G., Balouktsis, I.   +3 more
core  

A tunable WDM wavelength converter based on cross phase modulation effects in normal dispersion holey fiber

, 2003
We demonstrate a tunable wavelength-division-multiplexing wavelength converter based on cross-phase modulation in just 5.8m of highly nonlinear normal dispersion holey fiber (HF) and incorporating a precise compression-tuned apodized fiber-grating filter.
Lee, J., Richardson, D., Ibsen, M., Richardson, D.J., Monro, T., Yusoff, Z., Monro, T.M., Lee, J.H., Belardi, W., Richardson DJ, Belardi W, Monro TM, Ibsen M, Yusoff Z, Lee JH, M. Ibsen, W. Belardi, T.M. Monro, Z. Yusoff, D.J. Richardson, null Ju Han Lee   +20 more
core   +1 more source

Light‐Induced Field‐Tunneling Synapses in Solution‐Processed Van Der Waals Heterostructures for Scalable, Retina‐Inspired Optical Sensing

Advanced Functional Materials, EarlyView.
A scalable, solution‐processed WSe2/ZrO2‐x van der Waals heterostructure realizes a light‐induced field‐tunneling synapse (LIFTS) that activates exclusively under bright illumination, emulating the photopic adaptation of the human retina at the device level.
Kijeong Nam, Jihyun Kim, Soobeen Ji, In Soo Kim, Sejin Kim, Eungseon Yeon, Do Kyung Hwang, Iva Plutnarová, Zdeněk Sofer, Sang Min Won, Joohoon Kang   +10 more
wiley   +1 more source

Research of structure and control strategy of 6 kV chain STATCOM

Gong-kuang zidonghua, 2013
The paper proposed a design scheme of 6 kV chain static synchronous compensator. The compensator uses H-bridge cascade main circuit structure and carrier phase shifted sinusoidal pulse-width modulation, the AC side uses feed forward decoupling control ...
ZHOU Guo-dong
doaj   +1 more source