NSTL国家科技图书文献中心

1. PFCNet: Enhancing Rail Surface Defect Detection With Pixel-Aware Frequency Conversion Networks NSTL国家科技图书文献中心

Yue Wu | Fangfang Qiang ... - 《IEEE signal processing letters》 - 2025,32 - 606～610 - 共5页

摘要：-aware frequency* conversion network (PFCNet) to explore* | , thereby neglecting valuable high- and low-frequency | RSDD from a frequency* domain perspective. We use* | different attention mechanisms and frequency* enhancement* | Applying computer vision techniques to rail

关键词： Convolution | Feature extraction | Rails | Object detection | Frequency conversion | Surface treatment | Semantics | Inspection | Frequency-domain analysis | Accuracy

2. Two-Stage, Low Noise Quantum Frequency Conversion of Single Photons from Silicon-Vacancy Centers in Diamond to the Telecom C-Band NSTL国家科技图书文献中心

Schaefer, Marlon | Kambs, Benjamin ... - 《Advanced Quantum Technologies》 - 2025,8(2) - 2300228.1～2300228.7 - 共7页

摘要： frequency conversion to low-loss telecommunication | efficient, low-noise quantum frequency* conversion device* | -stage difference-frequency* mixing scheme, spontaneous* | parametric down-conversion* (SPDC) noise is circumvented and* | conversion.

关键词： nonlinear optics | quantum communication | quantum frequency conversion | single photons

3. The effect of quantum frequency conversion on the quantumness of radiation field states NSTL国家科技图书文献中心

Usefi R. | Tavassoly M.K. - 《Optik》 - 2025,321 - 共10页

摘要： into a quantum frequency* converter is our aim of the* | states, as the entrance waves to the quantum frequency | © 2024 Elsevier GmbHAnalyzing the | environmental response to high-power optical waves radiated | paper. We examine the non-classical properties of the

关键词： Antibunching | Entanglement | Number state | Pair coherent state | Quantum frequency conversion | Squeezing

4. Broadband High Frequency Power Conversion With Frequency-Tuning Matching Network NSTL国家科技图书文献中心

ZHECHI YE | Juan Rivas - 《IEEE Open Journal of Power Electronics》 - 2025,6 - 120～129 - 共10页

摘要：-frequency* resonant converter operation, but existing* | frequency. To drive the proposed frequency-tuning matching | load impedance with a tuning frequency* of around* | Varying load impedances challenge high | matching network solutions are typically slow, lossy, or

关键词： Impedance | Resistance | Broadband amplifiers | Inverters | Topology | Resonant frequency | Network topology | Frequency conversion | Plasmas | Tuning

5. Angle and Distance Discrimination by Utilizing Frequency Conversion Capability of STC-IRS for Covert Communications NSTL国家科技图书文献中心

Manlin Wang | Yao Yao ... - 《IEEE transactions on information forensics and security》 - 2025,20 - 1503～1518 - 共16页

摘要： the phase and the frequency* of the reflection signal* | shift and the frequency* shift at STC-IRS are optimized* | Covert communication is an important approach | to ensure information security by hiding the | transmission behavior. Space-domain-coding intelligent

关键词： Receivers | Array signal processing | Encoding | System performance | Rician channels | Optimization | Performance gain | Band-pass filters | Graphical models | Distribution functions

6. A Compact 0.9μ W Direct-Conversion Frequency Analyzer for Speech Recognition With Wide- Range Q-Controllable Bandpass Rectifier NSTL国家科技图书文献中心

Shiro Dosho | Ludovico Minati ... - 《IEEE transactions on very large scale integration (VLSI) systems》 - 2025,33(2) - 315～325 - 共11页

摘要： low-frequency* selection accuracy, leading to* | through direct conversion. By re-evaluating the circuit | transforms frequency* components into pulse sequences. The* | frequency to be analyzed is determined by the local | frequency input to the multiplier, which can be digitally

关键词： Frequency conversion | Speech recognition | Band-pass filters | Streams | Rectifiers | Frequency control | Power demand

7. L-shaped cantilever beam piezoelectric energy harvester with frequency up-conversion for ultra-low-frequency rotating environments NSTL国家科技图书文献中心

Pan Zhang | Wanrong Lin ... - 《Mechanical Systems & Signal Processing》 - 2025,225(Feb.) - 112281.1～112281.18 - 共18页

摘要： realizes the frequency* up-conversion of the cantilever* | frequency environments. Energy harvesting techniques | energy harvesting in ultra-low frequency* environments* | efficiency of energy harvesting in the ultra-low-frequency | frequency of the output voltage is increased and

关键词： Rotating machinery | Ultra-low-frequency | Piezoelectric energy harvesting | L-shaped cantilever beam | Frequency up-conversion

8. Efficient frequency conversion in dielectric metasurfaces supporting both surface lattice resonances and quasi-bound states in the continuum NSTL国家科技图书文献中心

Cho, Myong-Chon | Kim, Kwang-Hyon - 《Optics & Laser Technology》 - 2025,180 - 共7页

摘要：-harmonic generation (SHG), sum-frequency* generation (SFG* | ), and difference-frequency* generation (DFG). The* | . Besides efficient frequency* conversions, coexisting high* | For efficient coherent generation at various | wavelengths from nonlinear metasurfaces, we need to generate

关键词： Surface lattice resonances (SLRs) | Quasi-bound states in the continuum (quasi-BICs) | Dielectric metasurfaces | Second-harmonic generation (SHG) | Difference-frequency generation (DFG)

9. Broadband terahertz frequency-domain emission spectroscopy of DAST with a widely tunable quasi-monochromatic source and sensitive up-conversion detection NSTL国家科技图书文献中心

Li, Wei | Liu, Pengxiang ... - 《Optics & Laser Technology》 - 2025,180 - 共6页

摘要： sensitive up-conversion* detection. The spectrum is* | characterized by a frequency* resolution of similar to 0.05 THz* | A continuous 4-32 THz emission spectrum of | organic crystal DAST is obtained through a widely | tunable quasimonochromatic terahertz source and

关键词： Terahertz frequency domain spectroscopy | Up-conversion detection | Difference frequency generation | Organic crystal DAST | Nonlinear optics

10. Optoelectronic Oscillator Based Microwave Frequency Downconverter With Low Phase Noise and High Conversion Efficiency NSTL国家科技图书文献中心

Chongjia Huang | Zhenlong Li ... - 《Journal of Lightwave Technology》 - 2025,43(2) - 530～538 - 共9页 - 被引量：1

摘要：) signal frequency* down conversion. It is based on a dual* | purity local oscillator (LO) for radio frequency* (RF* | -power intermediate frequency* (IF) signal to be* | conversion efficiency problem in the reported OEO based | microwave frequency* down converters. Experimental results*

摘要：-aware frequency* conversion network (PFCNet) to explore* | , thereby neglecting valuable high- and low-frequency | RSDD from a frequency* domain perspective. We use* | different attention mechanisms and frequency* enhancement* | Applying computer vision techniques to rail

关键词： Convolution | Feature extraction | Rails | Object detection | Frequency conversion | Surface treatment | Semantics | Inspection | Frequency-domain analysis | Accuracy

摘要： frequency conversion to low-loss telecommunication | efficient, low-noise quantum frequency* conversion device* | -stage difference-frequency* mixing scheme, spontaneous* | parametric down-conversion* (SPDC) noise is circumvented and* | conversion.

关键词： nonlinear optics | quantum communication | quantum frequency conversion | single photons

摘要： into a quantum frequency* converter is our aim of the* | states, as the entrance waves to the quantum frequency | © 2024 Elsevier GmbHAnalyzing the | environmental response to high-power optical waves radiated | paper. We examine the non-classical properties of the

关键词： Antibunching | Entanglement | Number state | Pair coherent state | Quantum frequency conversion | Squeezing

摘要：-frequency* resonant converter operation, but existing* | frequency. To drive the proposed frequency-tuning matching | load impedance with a tuning frequency* of around* | Varying load impedances challenge high | matching network solutions are typically slow, lossy, or

关键词： Impedance | Resistance | Broadband amplifiers | Inverters | Topology | Resonant frequency | Network topology | Frequency conversion | Plasmas | Tuning

摘要： the phase and the frequency* of the reflection signal* | shift and the frequency* shift at STC-IRS are optimized* | Covert communication is an important approach | to ensure information security by hiding the | transmission behavior. Space-domain-coding intelligent

关键词： Receivers | Array signal processing | Encoding | System performance | Rician channels | Optimization | Performance gain | Band-pass filters | Graphical models | Distribution functions

摘要： low-frequency* selection accuracy, leading to* | through direct conversion. By re-evaluating the circuit | transforms frequency* components into pulse sequences. The* | frequency to be analyzed is determined by the local | frequency input to the multiplier, which can be digitally

关键词： Frequency conversion | Speech recognition | Band-pass filters | Streams | Rectifiers | Frequency control | Power demand

摘要： realizes the frequency* up-conversion of the cantilever* | frequency environments. Energy harvesting techniques | energy harvesting in ultra-low frequency* environments* | efficiency of energy harvesting in the ultra-low-frequency | frequency of the output voltage is increased and

关键词： Rotating machinery | Ultra-low-frequency | Piezoelectric energy harvesting | L-shaped cantilever beam | Frequency up-conversion

摘要：-harmonic generation (SHG), sum-frequency* generation (SFG* | ), and difference-frequency* generation (DFG). The* | . Besides efficient frequency* conversions, coexisting high* | For efficient coherent generation at various | wavelengths from nonlinear metasurfaces, we need to generate

关键词： Surface lattice resonances (SLRs) | Quasi-bound states in the continuum (quasi-BICs) | Dielectric metasurfaces | Second-harmonic generation (SHG) | Difference-frequency generation (DFG)

摘要： sensitive up-conversion* detection. The spectrum is* | characterized by a frequency* resolution of similar to 0.05 THz* | A continuous 4-32 THz emission spectrum of | organic crystal DAST is obtained through a widely | tunable quasimonochromatic terahertz source and

关键词： Terahertz frequency domain spectroscopy | Up-conversion detection | Difference frequency generation | Organic crystal DAST | Nonlinear optics

摘要：) signal frequency* down conversion. It is based on a dual* | purity local oscillator (LO) for radio frequency* (RF* | -power intermediate frequency* (IF) signal to be* | conversion efficiency problem in the reported OEO based | microwave frequency* down converters. Experimental results*

关键词： Radio frequency | Optical filters | RF signals | Optical polarization | Phase noise | Microwave frequencies | Amplitude modulation

4008-161-200 800-990-8900

国家科技图书文献中心

摘要：-aware frequency conversion network (PFCNet) to explore | , thereby neglecting valuable high- and low-frequency | RSDD from a frequency domain perspective. We use | different attention mechanisms and frequency enhancement | Applying computer vision techniques to rail

关键词： Convolution | Feature extraction | Rails | Object detection | Frequency conversion | Surface treatment | Semantics | Inspection | Frequency-domain analysis | Accuracy

摘要： frequency conversion to low-loss telecommunication | efficient, low-noise quantum frequency conversion device | -stage difference-frequency mixing scheme, spontaneous | parametric down-conversion (SPDC) noise is circumvented and | conversion.

关键词： nonlinear optics | quantum communication | quantum frequency conversion | single photons

摘要： into a quantum frequency converter is our aim of the | states, as the entrance waves to the quantum frequency | © 2024 Elsevier GmbHAnalyzing the | environmental response to high-power optical waves radiated | paper. We examine the non-classical properties of the

关键词： Antibunching | Entanglement | Number state | Pair coherent state | Quantum frequency conversion | Squeezing

摘要：-frequency resonant converter operation, but existing | frequency. To drive the proposed frequency-tuning matching | load impedance with a tuning frequency of around | Varying load impedances challenge high | matching network solutions are typically slow, lossy, or

关键词： Impedance | Resistance | Broadband amplifiers | Inverters | Topology | Resonant frequency | Network topology | Frequency conversion | Plasmas | Tuning

摘要： the phase and the frequency of the reflection signal | shift and the frequency shift at STC-IRS are optimized | Covert communication is an important approach | to ensure information security by hiding the | transmission behavior. Space-domain-coding intelligent

关键词： Receivers | Array signal processing | Encoding | System performance | Rician channels | Optimization | Performance gain | Band-pass filters | Graphical models | Distribution functions

摘要： low-frequency selection accuracy, leading to | through direct conversion. By re-evaluating the circuit | transforms frequency components into pulse sequences. The | frequency to be analyzed is determined by the local | frequency input to the multiplier, which can be digitally

关键词： Frequency conversion | Speech recognition | Band-pass filters | Streams | Rectifiers | Frequency control | Power demand

摘要： realizes the frequency up-conversion of the cantilever | frequency environments. Energy harvesting techniques | energy harvesting in ultra-low frequency environments | efficiency of energy harvesting in the ultra-low-frequency | frequency of the output voltage is increased and

关键词： Rotating machinery | Ultra-low-frequency | Piezoelectric energy harvesting | L-shaped cantilever beam | Frequency up-conversion

摘要：-harmonic generation (SHG), sum-frequency generation (SFG | ), and difference-frequency generation (DFG). The | . Besides efficient frequency conversions, coexisting high | For efficient coherent generation at various | wavelengths from nonlinear metasurfaces, we need to generate

关键词： Surface lattice resonances (SLRs) | Quasi-bound states in the continuum (quasi-BICs) | Dielectric metasurfaces | Second-harmonic generation (SHG) | Difference-frequency generation (DFG)

摘要： sensitive up-conversion detection. The spectrum is | characterized by a frequency resolution of similar to 0.05 THz | A continuous 4-32 THz emission spectrum of | organic crystal DAST is obtained through a widely | tunable quasimonochromatic terahertz source and

关键词： Terahertz frequency domain spectroscopy | Up-conversion detection | Difference frequency generation | Organic crystal DAST | Nonlinear optics

摘要：) signal frequency down conversion. It is based on a dual | purity local oscillator (LO) for radio frequency (RF | -power intermediate frequency (IF) signal to be | conversion efficiency problem in the reported OEO based | microwave frequency down converters. Experimental results

关键词： Radio frequency | Optical filters | RF signals | Optical polarization | Phase noise | Microwave frequencies | Amplitude modulation

4008-161-200 800-990-8900

国家科技图书文献中心

摘要：-aware frequency* conversion network (PFCNet) to explore* | , thereby neglecting valuable high- and low-frequency | RSDD from a frequency* domain perspective. We use* | different attention mechanisms and frequency* enhancement* | Applying computer vision techniques to rail

摘要： frequency conversion to low-loss telecommunication | efficient, low-noise quantum frequency* conversion device* | -stage difference-frequency* mixing scheme, spontaneous* | parametric down-conversion* (SPDC) noise is circumvented and* | conversion.

摘要： into a quantum frequency* converter is our aim of the* | states, as the entrance waves to the quantum frequency | © 2024 Elsevier GmbHAnalyzing the | environmental response to high-power optical waves radiated | paper. We examine the non-classical properties of the

摘要：-frequency* resonant converter operation, but existing* | frequency. To drive the proposed frequency-tuning matching | load impedance with a tuning frequency* of around* | Varying load impedances challenge high | matching network solutions are typically slow, lossy, or

摘要： the phase and the frequency* of the reflection signal* | shift and the frequency* shift at STC-IRS are optimized* | Covert communication is an important approach | to ensure information security by hiding the | transmission behavior. Space-domain-coding intelligent

摘要： low-frequency* selection accuracy, leading to* | through direct conversion. By re-evaluating the circuit | transforms frequency* components into pulse sequences. The* | frequency to be analyzed is determined by the local | frequency input to the multiplier, which can be digitally

摘要： realizes the frequency* up-conversion of the cantilever* | frequency environments. Energy harvesting techniques | energy harvesting in ultra-low frequency* environments* | efficiency of energy harvesting in the ultra-low-frequency | frequency of the output voltage is increased and

摘要：-harmonic generation (SHG), sum-frequency* generation (SFG* | ), and difference-frequency* generation (DFG). The* | . Besides efficient frequency* conversions, coexisting high* | For efficient coherent generation at various | wavelengths from nonlinear metasurfaces, we need to generate

摘要： sensitive up-conversion* detection. The spectrum is* | characterized by a frequency* resolution of similar to 0.05 THz* | A continuous 4-32 THz emission spectrum of | organic crystal DAST is obtained through a widely | tunable quasimonochromatic terahertz source and

摘要：) signal frequency* down conversion. It is based on a dual* | purity local oscillator (LO) for radio frequency* (RF* | -power intermediate frequency* (IF) signal to be* | conversion efficiency problem in the reported OEO based | microwave frequency* down converters. Experimental results*