Results 51 to 60 of about 1,790,403 (266)

Nyquist Zone Index and Chirp Rate Estimation of LFM Signal Intercepted by Nyquist Folding Receiver Based on Random Sample Consensus and Fractional Fourier Transform

Sensors, 2019
The Nyquist folding receiver (NYFR) can achieve a high-probability interception of an ultra-wideband (UWB) signal with fewer devices, while the output of the NYFR is converted into a hybrid modulated signal of the local oscillator (LO) and the received ...
Xinqun Liu, Tao Li, Xiaolei Fan, Zengping Chen   +3 more
doaj   +1 more source

Dipolar Coupling Errors in Nuclear Spin Qubits

Advanced Science, EarlyView.
Multi‐nuclear spin registers of phosphorus‐atom qubits in silicon have demonstrated 99.99% single and >$>$99.9% two qubit gate fidelities. Despite nanometer separation, read‐out fidelities between individual nuclear spins within the register are not identical.
I. D. Thorvaldson, P. Macha, J. Reiner, S. H. Misha, Y. Chung, L. Kranz, D. Keith, S. Monir, D. Poulos, S. Sutherland, Y.‐L. Hsueh, B. Thorgrimsson, R. Rahman, J. G. Keizer, S. K. Gorman, M. Y. Simmons   +15 more
wiley   +1 more source

Direct Underwater Sound Velocity Measurement Based on the Acousto-Optic Self-Interference Effect between the Chirp Signal and the Optical Frequency Comb

Journal of Marine Science and Engineering, 2022
Underwater sound speed plays a vital role in maritime safety. Based on the acousto-optic self-interference effect, we proposed a new method to measure underwater sound speed utilizing Raman–Nath diffraction, generated by the acousto-optic effect between ...
Zihui Yang, Fanpeng Dong, Hongguang Liu, Xiaoxia Yang, Zhiwei Li, Bin Xue   +5 more
doaj   +1 more source

NbN Broadband Plasmonic Absorbers for Efficient Hot‐Carrier Injection Toward Improved Solar‐to‐Hydrogen Conversion

Advanced Science, EarlyView.
Niobium nitride (NbN) broadband plasmonic metasurface absorbers provide an efficient platform for solar‐energy conversion through hot‐carrier injection. Quasi‐epitaxial NbN features a low work function of 4.0 eV, reducing the interfacial injection barrier and facilitating charge transfer into adjacent photocatalysts.
Tzu‐Yu Peng, Tse‐Fu Huang, Takeshi Yamaguchi, Jia‐Wern Chen, Hsing‐Yu Kuo, Ying‐Rang Zhuang, Hung Wei Shiu, Seongmin Im, Yang Zhao, Takuo Tanaka, Ho‐Hsiu Chou, Yu‐Jung Lu   +11 more
wiley   +1 more source

Chirp Signal Detection Performance Analysis Based on Generalized Stochastic Resonance

工程科学与技术, 2014
:For estimating the parameter information of target chirp signal within multiple chirp signal and noise,which is the conventional familiar model in signal processing,the stochastic resonance (SR) in over-damped bistable system driven by the multiple ...
王会琦, 吕王勇, 彭皓
doaj  

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

Waveform engineering analysis of photoacoustic radar chirp parameters for spatial resolution and SNR optimization

Photoacoustics, 2019
Recent developments in photoacoustics have witnessed the implementation of a radar matched-filtering methodology into the continuous wave photoacoustic modality. The main merit of using matched filtering in continuous photoacoustics is the improvement in
Zuwen Sun, Natalie Baddour, Andreas Mandelis   +2 more
doaj   +1 more source

ADMM–Net: A Deep Learning Approach for Parameter Estimation of Chirp Signals Under Sub-Nyquist Sampling

IEEE Access, 2020
Parameter estimation of chirp signals plays an important role in the field of radar countermeasures. Compressed sensing (CS) based sub-Nyquist sampling and parameter estimation methods alleviates the pressure on hardware systems to acquire and process ...
Hanning Su, Qinglong Bao, Zengping Chen
doaj   +1 more source

Low Correlation Interference OFDM-NLFM Waveform Design for MIMO Radar Based on Alternating Optimization

Sensors, 2021
The OFDM chirp signal is suitable for MIMO radar applications due to its large time-bandwidth product, constant time-domain, and almost constant frequency-domain modulus.
Tianqu Liu, Jinping Sun, Qing Li, Zhimei Hao, Guohua Wang   +4 more
doaj   +1 more source

Phosphine Coordination to Ce, Nd, Np, and Pu in ArBiAMPtBu‐Supported Complexes and Their 2H and 13C Isotopologues

Advanced Science, EarlyView.
A dianionic ligand designed to encourage metal‐phosphine coordination—bis((3,5‐dimethylphenyl)amidomethyl)tertbutylphosphine (ArBiAMPtBu)—was employed in the synthesis of paramagnetic complexes of Ce, Nd, Np, and Pu, producing MI(ArBiAMPtBu)(thf)3.
Novan A. G. Gray, Yury Minko, Brenna K. Cashman, R. Joseph Lastowski, Adam R. Altenhof, Harris E. Mason, Daniel J. Lussier, Frank MacGregor, Andrew J. Gaunt, Aaron M. Tondreau   +9 more
wiley   +1 more source