Results 31 to 40 of about 107,562 (201)

Chirp-compensated pulsed titanium-sapphire laser system for precision spectroscopy

, 2021
Active frequency-chirp compensation for a narrowband pulsed Titanium-Sapphire laser system is demonstrated using an intra-cavity electro-optic modulator resulting in improved spectral resolution and stability.
C. Cheng (820663), W. Ubachs (4332412), J. Hussels (14411643), E. J. Salumbides (4332418)   +3 more
core   +1 more source

Study of the Frequency Slope Effect on the Chirp Waveform Orthogonality

International Conference on Radar Systems (Radar 2017), 2017
Multiple-Beam Radar Systems (MBRS) based on waveform diversity require a set of orthogonal waveforms in order to generate multiple channels in transmission and extract them efficiently at the receiver using digital signal processing. Chirp signals are extensively used in radar systems due to their pulse compression properties, Doppler tolerance and ...
Kocjancic, Leon, Balleri, Alessio, Merlet, T.   +2 more
openaire   +2 more sources

Searching for wormholes with gravitational wave scattering

European Physical Journal C: Particles and Fields, 2023
We propose using the gravitational wave scattering off spherical wormholes to search for their existence. We carefully calculate the reflected and transmitted waveforms with time-independent scattering theory.
Hong Zhang, Shaoqi Hou, Shou-shan Bao
doaj   +1 more source

A Novel Waveform to Extract Exercise Gas Exchange Response Dynamics: The Chirp Waveform [PDF]

, 2023
Characterizing exercise gas exchange response dynamics reveals important information about physiological control processes and cardiopulmonary dysfunction.
Casaburi, Richard, Porszasz, Janos, Girardi, Michele, Stringer, William W, Ferguson, Carrie, Rossiter, Harry B, Roman, Michael A   +6 more
core  

Analysis of LFM-waveform Libraries for Cognitive Tracking Maneuvering Targets

MATEC Web of Conferences, 2016
Based on the idea of the waveform agility in cognitive radars，the waveform libraries for maneuvering target tracking are discussed. LFM-waveform libraries are designed according to different combinations of chirp parameters and FrFT rotation angles.
Wang Hongyan, Yu Daobin, Wu Yanhong
doaj   +1 more source

A Novel MIMO-SAR System Based on Simultaneous Digital Beam Forming of Both Transceiver and Receiver

Sensors, 2020
Orthogonal frequency division multiplexing (OFDM) chirp waveform, which is composed of two or more successive identical linear frequency modulated sub pulses, is a newly proposed orthogonal waveform scheme for multi-input multi-output (MIMO) synthetic ...
Yuzhen Zhao, Longyong Chen, Fubo Zhang, Yanlei Li, Yirong Wu   +4 more
doaj   +1 more source

Temporal Waveform Control of Laser Pulse by Frequency Chirping.

The Review of Laser Engineering, 1997
Arbitrary temporal waveform control can be achieved by means of amplifier gain control with chirped laser pulse. As lasers for fusion research are broad-band glass lasers, a chirping method of the THz region is required to obtain arbitrary temporal waveform control.
KATO, Yoshinori, YOSHIDA, Hidetsugu, FUJITA, Hisanori, NAKAI, Sadao   +3 more
openaire   +2 more sources

Micro/Nanoscale Acoustic Manipulation: From Particle Control to Autonomous Microswimmers

Advanced Science, EarlyView.
This conceptual framework illustrates acoustic technology as a multifunctional platform enabling passive particle manipulation across scales and autonomous propulsion of microswimmers. ABSTRACT Acoustic manipulation and propulsion technologies have emerged as powerful platforms for micro/nanoscale control, enabled by their non‐contact operation, label ...
Jiahui Chu, Lemin Zhang, Xu Wang, Wenzong Li, Yahua Liu   +4 more
wiley   +1 more source

Closing the Loop: High‐Precision 3D Photofabrication in Living Tissues

Advanced Science, EarlyView.
Writing 3D microstructures inside living tissue demands more than laser access; It demands information. Hierarchical sensing captures thermal and mechanical states across pulse‐train, voxel, and structure timescales, feeding a controller that steers the laser in real time.
Amirbahador Zeynali, Mangirdas Malinauskas, Giuseppe Chirico   +2 more
wiley   +1 more source

Fetal electrocardiogram: ST waveform analysis in intrapartum surveillance [PDF]

, 2007
ST waveform analysis of fetal electrocardiogram (ECG) for intrapartum surveillance (STAN) is a newly introduced method for fetal surveillance. The purpose of this commentary is to assist in the proper use of fetal ECG in combination with cardiotocography
I Amer‐Wahlin, S Arulkumaran, Marsál, K, H Hagberg, Hagberg, H, GHA Visser, Visser, GH, Arulkumaran, S., Visser, G. H. A., Amer-Wåhlin, Isis,, Marsal, Karel,, Amer-Wåhlin, Isis, K Maršál, Marsal, Karel, Arulkumaran, S, Amer-Wahlin, I, Lund University., Visser, GHA, Hagberg, H.   +18 more
core   +1 more source