A5100721626- Advanced SAR Imaging Techniques
- Antenna Design and Optimization
- Microwave Imaging and Scattering Analysis
- Antenna Design and Analysis
- Terahertz technology and applications
- Microwave Engineering and Waveguides
- Soil Moisture and Remote Sensing
- Image and Signal Denoising Methods
- Face and Expression Recognition
- Sparse and Compressive Sensing Techniques
- Advanced Antenna and Metasurface Technologies
- Radar Systems and Signal Processing
- Geophysical Methods and Applications
- Advanced Image and Video Retrieval Techniques
- Climate variability and models
- Direction-of-Arrival Estimation Techniques
- Image Processing Techniques and Applications
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Advanced Image Processing Techniques
- Educational Technology and Pedagogy
- Underwater Acoustics Research
- Energetic Materials and Combustion
- Superconducting and THz Device Technology
- Radio Frequency Integrated Circuit Design
- Photonic and Optical Devices
Nanjing University of Science and Technology
2014-2024
China Three Gorges University
2024
Yunnan University
2022-2023
Shanghai Research Institute of Chemical Industry
2023
Zhejiang Lab
2022
University of Bremen
2022
UNSW Sydney
2019-2022
National Taiwan University Hospital
2021
Xinxiang Medical University
2021
University of Science and Technology Beijing
2018
Abstract. The Earth climate system is out of energy balance, and heat has accumulated continuously over the past decades, warming ocean, land, cryosphere, atmosphere. According to Sixth Assessment Report by Working Group I Intergovernmental Panel on Climate Change, this planetary multiple decades human-driven results in unprecedented committed changes system, with adverse impacts for ecosystems human systems. inventory provides a measure imbalance (EEI) allows quantifying how much as well...
We present a novel, to the best of our knowledge, design chromatic confocal displacement system (CCDS) based on spectral stripe. In this system, light collected by dispersive lens is shaped Powell and then diffracted onto detector in form thin straight The variant converted into change stripe positions detector. Unlike profile or diffractive spot, significantly increases pixel number for analysis effectively suppresses random noises. Simulation experiment results show that positional...
Due to the fact that imaging distance is similar dimension of synthetic aperture antenna in near-field, Fourier theory used traditional radiometer (SAIR), which based on far-field approximation, invalid for near-field imaging.This paper devoted establishing an accurate algorithm nearfield millimeter wave SAIR.Firstly, deduced and its relationship analyzed.Then, established.In this method, quadratic phase item pattern are taken into consideration, image reconstruction performed by minimizing...
With the availability of whole-slide imaging in pathology, high-resolution images offer a more convenient disease observation but also require content-based retrieval large scans. The bag-of-visual-words methodology has shown high ability to describe image content for recognition and purposes. In this work, variant with multiple dictionaries histopathology classification is proposed tested on dataset Kimia Path24 than 27,000 patches size 1000 × belonging 24 different classes. Features are...
When thermopile sensor is used for safety monitoring of equipment in industrial environments, particularly measuring the thermal radiation information device, measured result this kind usually affected by ambient temperature due to its unique structure. An improved PSO-BP algorithm proposed compensation and correcting error condition system accuracy requirements reduced temperature. The core improve certainty initial weights thresholds that belonged BP neural network then train samples using...
One of the radar high‐resolution range profile (HRRP) recognition issues is target‐aspect sensitivity. Both theoretical analysis and real‐world data show that HRRP shows a high correlation only in very small aspect region. To overcome this problem, traditional methods, scattering centre model averaged are utilised. In study, authors present graph‐based semi‐supervised method, called geodesic weighted sparse representation (GWSR), to sensitivity problem. It assumed from different targets...
Abstract. The Earth climate system is out of energy balance and heat has accumulated continuously over the past decades, warming ocean, land, cryosphere atmosphere. According to 6th Assessment Report Intergovernmental Panel on Climate Change, this planetary multiple decades human-driven results in unprecedented committed changes system, with adverse impacts for ecosystems human systems. inventory provides a measure imbalance, allows quantifying how much where stored. Here we show that 380 ±...
A photorealistic scene in a head mount display (HMD) is considered high fidelity and associated with postural stability similar to that the real world, but effects of visual background under different standing conditions have not been examined. Thirty-four healthy adults performed four (standardized, narrow, tandem one-leg) tasks three scenes an HMD, while viewing one scenes: room (real scene, RS), (VrS) blank (BS). The on sway parameters were analyzed. Romberg quotients (RQs) compared...
One of the radar high resolution range profile (HRRP) target recognition issues is existence noise interference, especially for ground target. The performance traditional shallow methods degrades as suffering from limited capability extracting robust and discriminative features. In this paper, a novel deep neural network called stacked denoising contractive auto-encoder (SDCAE) designed millimeter wave HRRP recognition. To enhance learning structure correlations corrupted data, by combining...
A W-band dual-band waveguide band-pass filter composed of two dual-mode (TE101 and TE201) cavities four single-mode (TE101) ones is presented. This with each passband fourth-order Chebyshev response synthesised designed the centre frequencies 85.35 101.45 GHz, as well 3 dB fractional bandwidths 5.3 2.1% by adopting resonators controllable coupling technique. The prototype fabricated conventional computer numerical control milling technology easily. measured results are very close to...
Because of the multiplication antennas, harmonic beamforming based on time-modulated planar array (TMPA) requires a much longer modulation period than linear (TMLA). Two additional constraints should also be fulfilled: 1) avoid aliasing in frequency domain; larger transmitted signal's bandwidth and 2) accurately extract harmonics; bandpass filter (BPF) no less frequency. If signal increases, processor radio (RF) switch accordingly improved, thus increasing overall costs. In this article, we...
High‐resolution millimetre wave images of contiguous targets often suffer from the influence sidelobe artefacts, partial correlation between and so on. Owing to characteristics near‐field synthetic aperture imaging radiometers [such as changing point spread function (PSF) slender sideline], existing CLEAN algorithms are unsuitable for imaging. This study is devoted establishing a novel algorithm (named adaptive CLEAN) clean reconstructed accurately. First, studied. Then, established based on...
Millimeter-wave synthetic aperture imaging radiometer (SAIR) is a powerful sensor for near-field high-resolution observations. However, the large receiver number and system complexity affect application of SAIR. To overcome this shortage (receiver number), an accurate algorithm based on compressed sensing (CS) theory proposed in paper. For reconstructing brightness temperature images accurately from sparse SAIR with fewer receivers, CS-based used to accomplish reconstruction visibility...
The Compressive Sensing (CS) approach has proven to be useful for Synthetic Aperture Interferometric Radiometer (SAIR) imaging because it provides the same high-resolution capability while using part of interferometric observations compared traditional methods entirety. However, cannot always obtain sparsest solution and may yield outliers with non-adaptive random measurement matrix adopted by current CS models. To solve those problems, this paper proposes a robust reweighted L₁-minimization...
Since passive millimeter wave (PMMW) imaging has a lot of advantages over optical and infa-red imaging, it been widely applied in the areas regarding remote sensing, security check military. In this paper, content based image classification system is proposed. The high-dimensional adaptive manifolds Laplacian Gaussian PMMW filtering firstly exploited to remove strong noise existing images. local binary pattern extract feature for each training sample. extracted features are then used achieve...
Target recognition in Millimeter-wave Interferometric Synthetic Aperture Radiometer (MMW InSAR) imaging is always a crucial task. However, the performance of conventional algorithms degrades when facing unpredictable noise interference practical scenarios and information-loss caused by inverse processing InSAR. These difficulties make it very necessary to develop general-purpose denoising techniques robust feature extractors for InSAR target recognition. In this paper, we propose...
Abstract In this study, a novel scheme is proposed for bidirectional beamforming using time‐modulated linear arrays (TMLAs). A method with time shift was adopted to obtain the pattern +1st harmonic two switching sequences. Furthermore, genetic algorithm modified an additional beam fundamental component. approach, direction and sidelobe of can be controlled by designing sequences, resulting in low complexity flexible structure case beamforming. The simulation results show effectiveness...
Thermal risk analysis is essential for the development of chemical reactions. This work should be carried out on basis a thorough comprehension reaction mechanism. In this article, synthesis process 2,6-diaminopyrazine-1-oxide (DAPO), an important intermediate in famous explosive 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105), was employed to show importance understanding mechanism thermal analysis. First, we investigated DAPO synthesis. The divided into two stages amount triethylamine...
The debate over the appropriacy of EGAP and ESP has been an ongoing concern in many higher education contexts. In this paper we discuss how teachers’ students’ perceptions English curriculum needs are reflected conflict between short-term goals, such as passing exams, long-term career development. Students, doctors teachers at a medical university central part China were asked about their through questionnaires structured interviews. findings suggest that whilst felt need for to be taught...
Since the characters of poor inherent resolution and low signal-to-noise limit application passive millimeter wave (PMMW) image, it is particularly important to improve denoise PMMW image. In this paper, adaptive manifolds flltering algorithm based on non-local means (AM-NLM) illustrated in detail. And an improved version AM-NLM proposed for processing The flrstly applies obtain basic denoised Then image enhancement Laplacian Gaussian operator performed enhance edge target Finally,...