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Self-confocal NIR-II fluorescence microscopy for multifunctional in vivo imaging

Journal of Innovative Optical Health Sciences 2024年第1期17卷 105-119页

作者： Jing Zhou Tianxiang Wu Runze Chen Liang Zhu Hequn Zhang Yifei Li Liying Chen Jun Qian State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058P.R.China Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang UniversityHangzhou 310058P.R.China College of Biomedical Engineering and Instrument Science Interdisciplinary Institute of Neuroscience and Technology(ZIINT)Zhejiang UniversityHangzhou 310027P.R.China

Fluorescence imaging in the second near-infrared window(NIR-II,900–1880 nm)with less scattering background in biological tissues has been combined with the confocal microscopic system for achieving deep in vivo imaging with high spatial ***,the traditional NIR-IIfluorescence confocal microscope with separate excitation focus and detection pinhole makes it possess low confocal e±ciency,as well as di±cultly to *** types of upgraded NIR-IIfluorescence confocal microscopes,sharing the same pinhole by excitation and emission focus,leading to higher confocal e±ciency,are built in this *** type is-ber-pinhole-based confocal microscope applicable to CW laser *** is constructed forfluorescence intensity imaging with large depth,high stabilization and low cost,which could replace multiphotonfluorescence microscopy in some applications(e.g.,cerebrovascular and hepatocellular imaging).The other type is air-pinhole-based confocal microscope applicable to femtosecond(fs)laser *** can be employed not only for NIR-IIfluorescence intensity imaging,but also for multi-channelfluorescence lifetime imaging to recognize different structures with similarfluorescence ***,it can be facilely combined with multiphotonfluorescence microscopy.A single fs pulsed laser is utilized to achieve up-conversion(visible multiphotonfluorescence)and down-conversion(NIR-II one-photonfluorescence)excitation simultaneously,extending imaging spectral channels,and thus facilitates multi-structure and multi-functional observation.

关键词： Self-confocal fiber-pinhole air-pinhole multi-channe fluorescence lifetime imaging multi-color imaging

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Formation of quasi-single helicity state from a paramagnetic pinch in KTX regime

arXiv

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arXiv 2024年

作者： Luo, Bing Zhu, Ping Yan, Wentan Li, Hong Liu, Wandong Hunan Province Key Laboratory Integration and Optical Manufacturing Technology College of Mathematics and Physics Hunan University of Arts and Science Hunan Changde415000 China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China Department of Nuclear Engineering and Engineering Physics University of Wisconsin-Madison MadisonWI53706 United States School of Nuclear Science and Technology University of Science and Technology of China Anhui Hefei230026 China

The formation of quasi-single helicity (QSH) state from a paramagnetic pinch in the KTX-RFP regime has been observed in recent NIMROD simulations. The quasi-single helicity state has a dominant helical component of the magnetic field that is known to improve the RFP confinement. For the initial paramagnetic pinch, linear calculations indicate that the tearing mode growth rate decreases with the plasma β. The initial QSH state arises from the dominant linear instability of the initial force-free paramagnetic pinch. The plasma’s self-organization towards the second QSH state after the relaxation of the initial QSH state is found to depend on β. Specifically, when β Copyright © 2024, The Authors. All rights reserved.

关键词： Paramagnetism

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Ball Mill Fault Prediction Based on Deep Convolutional Auto-Encoding Network

arXiv

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arXiv 2023年

作者： Ai, Xinkun Liu, Kun Zheng, Wei Fan, Yonggang G. Wu, Xinwu Zhang, Peilong Wang, LiYe Zhu, JanFeng Pan, Yuan State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Wugang Resources Group Co. Ltd. Ezhou436000 China

Ball mills play a critical role in modern mining operations, making their bearing failures a significant concern due to the potential loss of production efficiency and economic consequences. This paper presents an anomaly detection method based on Deep Convolutional Auto-encoding Neural Networks (DCAN) for addressing the issue of ball mill bearing fault detection. The proposed approach leverages vibration data collected during normal operation for training, overcoming challenges such as labeling issues and data imbalance often encountered in supervised learning methods. DCAN includes the modules of convolutional feature extraction and transposed convolutional feature reconstruction, demonstrating exceptional capabilities in signal processing and feature extraction. Additionally, the paper describes the practical deployment of the DCAN-based anomaly detection model for bearing fault detection, utilizing data from the ball mill bearings of Wuhan Iron & Steel Resources Group and fault data from NASA's bearing vibration dataset. Experimental results validate the DCAN model's reliability in recognizing fault vibration patterns. This method holds promise for enhancing bearing fault detection efficiency, reducing production interruptions, and lowering maintenance costs. Copyright © 2023, The Authors. All rights reserved.

关键词： Feature extraction

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EPICS Based Distributed Beam Optimization Framework in HUSTFEL Control System

EPICS Based Distributed Beam Optimization Framework in HUSTF...

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Electrical engineering (CIYCEE), IEEE China International Youth Conference on

作者： Liming Zhong Yanqi Hu Xiude Tu Yongqian Xiong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781665400657

The compact terahertz free electron laser light source requires high quality of electron beam. For the long time the beam tuning tasks were done by operators manually, however it is challenging for operators to obtain ideal beam quality. Automatic beam tuning methods using optimization algorithms are required. Therefore a software framework, the sequential decision-making framework, has been developed so as to utilize existing tuning methods and newly emerged intelligent control techniques in the accelerator control community. The framework can serve as a platform for the development, test and demonstration of different control algorithms. It can also support normal tasks like automatic emittance measurement and remnant magnetism removal of quadrupoles. Since the completion of the framework, the efficiency of the laboratory operations has been greatly improved.

关键词： Software algorithms Measurement by laser beam Control systems Software Laser beams Laser tuning Task analysis

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Research on the Variation of Lightning Activity Parameters with Land Types Based on Lightning Location System 4

Research on the Variation of Lightning Activity Parameters w...

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4th IEEE China International Electrical and Energy Conference, CIEEC 2021

作者： Han, Wuqi Zhang, Dandan Zhao, Hailong Wei, Shixun Pang, Songling Pan, Wenwu Electric Power Science Research Institute of Hainan Power Grid Co. Ltd. Hainan Power Grid Tropical Smart Grid Laboratory Haikou China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9781728171494

The statistics of lightning activity parameters is the basis to guide the lightning protection design, transformation and study of lightning characteristics of transmission lines. The lightning activity parameters are closely related to the land type. Based on the ground lightning data of lightning location system in Hainan Island, combined with the land type data from resource and environmental science and data center, this paper uses ArcGIS geographic software to supplement the land type data of ground flash point, and studies the law of lightning activity parameters and land types, such as mean value of lightning current amplitude, ground lightning density, cumulative probability distribution of lightning current amplitude, positive lightning ratio and so on. The study shows that the average amplitude of total lightning current in paddy field is the largest;due to the heat island effect, the total land flash density, negative ground flash density and positive ground flash density of urban land are much higher than those of other land types, and more attention should be paid to the transformation of forest land lightning protection measures;the median current of cultivated land is the largest, and the probability of larger amplitude lightning current is the largest. The proportion of positive flashover in lakes is the largest, so the influence of positive lightning on lightning shielding of transmission lines should be properly considered. © 2021 IEEE.

关键词： Electric lines

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Transient and Steady-State Response of AlGaN/GaN Terahertz Detectors under Sinusoidal Excitation of Different Intensities

Transient and Steady-State Response of AlGaN/GaN Terahertz D...

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International Conference on Infrared and Millimeter Waves

作者： Huiting Xia Zhengya Yin Shanshan Jia Lei Cao State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Terahertz field effect transistors (TeraFETs) based on AlGaN/GaN materials have high responsivity and sensitivity at room temperature. Based on the hydrodynamic equations, the nonlinear voltage response (transient and steady-state) of this type of THz detector was numerically calculated by finite difference method under THz excitation with different frequencies and intensities. Comparisons with the existing analytical formula and the analysis of the influence of viscosity coefficient on the response were also presented.

关键词： Viscosity Temperature sensors Sensitivity Detectors Voltage Mathematical models Wide band gap semiconductors

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Species dependence of the impurity injection induced poloidal flow and magnetic island rotation in a tokamak

arXiv

引用

arXiv 2023年

作者： Zeng, Shiyong Zhu, Ping Ren, Haijun Department of Engineering and Applied Physics University of Science and Technology of China Anhui Hefei230026 China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China Department of Engineering Physics University of Wisconsin-Madison MadisonWI53706 United States

Recent experiments have demonstrated the species dependence of the impurity poloidal drift direction along with the magnetic island rotation in the poloidal plane. Our resistive MHD simulations have reproduced such a dependence of the impurity poloidal flow, which is found mainly determined by a local plasmoid formation due to the impurity injection. The synchronized magnetic island rotation is dominantly driven by the electromagnetic torque produced by the impurity radiation primarily through the modification to the axisymmetric components of current density. © 2023, CC BY-NC-SA.

关键词： Magnetoplasma

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Dual-Side Three-stage Asymmetric Phase Shift Strategy for Bidirectional Inductive Power Transfer System with SiC Power Module

Dual-Side Three-stage Asymmetric Phase Shift Strategy for Bi...

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Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia)

作者： Haowen Chen Changsong Chen Mengjie Jiang Shuran Jia Xuezheng Huang The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781665448178

Power exchange between vehicle and grid by bidirectional inductive power transfer (BIPT) system. This paper proposes a dual-side three-stage asymmetrical phase shift (TAPS) control strategy to achieve a high transmission efficiency with zero voltage switching (ZVS) in a wide range of load. With the proposed dual-side TAPS strategy, asymmetrically adjust the amplitude of the ac fundamental excitation voltage with three adjacent control periods as a waveform period. A wide ZVS range and a high system power factor can be realized simultaneously. In addition, when the load is light, the number of switching actions is significantly reduced. The control scheme for the full bridge of both sides is presented, which realizes both optimization of transmission efficiency and zero-voltage switching operation for all power switches. Simulation are performed to compare the effects of triple-phase-shift (TPS) strategy and proposed TAPS strategy on the transmission efficiency, which shows that the system with proposed TAPS control strategy realizes a higher transmission efficiency in a wide range of load.

关键词： Reactive power Silicon carbide Photonic band gap Asia Switches Zero voltage switching Control systems

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Enhanced Radiolysis Performance and Mineralization of Ciprofloxacin by Ionizing Radiation Combined with G-C3n4/Cds

SSRN

引用

SSRN 2022年

作者： Ye, Qi Zhu, Yi Yang, Miao Zhao, Long State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan430074 China

In this study, the degradation of ciprofloxacin (CIP) was investigated in the synergetic system of electron beam irradiation (EBI) combined with graphite carbon nitride / carbon nanodots (g-C 3 N 4 /CDs). The results suggested that the presence of g-C 3 N 4 /CDs could not only promote the degradation of CIP but also significantly enhanced the mineralization ratio. At 25 kGy, the mineralization ratio increased from 18.1% to 69.0% while g-C 3 N 4 /CDs was added. Regeneration experiments revealed that the g-C 3 N 4 /CDs composite possessed good reusability. In addition to finding that the presence of CO 3 2- , HCO 3 - , NO 3 - and NO 2 - obviously restrained the radiolysis process of CIP, the adding of Cl - and SO 4 2- could also have slight inhibitory effects. The effect of various water matrices in EBI&g-C 3 N 4 /CDs systems suggested that the degradation efficiency decreased in lake and tap water. Moreover, the studies in the presence of different radical scavengers suggested that ·OH was the main reactive species in the degradation process. The possible degradation pathway of CIP was proposed in the light of intermediate products using Liquid chromatograph-mass spectrometer (LC–MS) analysis coupled with DFT calculations. © 2022, The Authors. All rights reserved.

关键词： Radiolysis

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Origin and Elimination of Excess Iron Particles in Off-Stoichiometric Ba 0.6K 0.5-βFe 2As 2 δ Superconductors

SSRN

引用

SSRN 2023年

作者： Tu, Chang Dong, Chiheng Fu, Caida Han, Meng Tang, Minghui Huang, He Yao, Chao Wang, Dongliang Zhang, Xianping Ma, Yanwei Key Laboratory of Applied Superconductivity Institute of Electrical Engineering Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan250013 China

Iron impurities frequently observed in BaxK1-xFe2As2 wires and tapes not only cause local suppression of superconductivity but also act as macro-obstacles to transport current. We find that the agglomerated iron particles are not introduced by external sources or caused by incomplete reactions but result from the chemical environments determined by nominal compositions. The excess K added to the raw materials for compensating the evaporated K consumes the stoichiometric arsenic and induces unreacted iron. Decreasing the K content indeed removes the redundant Fe but also deteriorates superconductivity. Instead, slightly over-adding As is proved to be a twin-track approach to fabricate high-performance superconductors. Through modulation of the nominal composition Ba0.6K0.5-βFe2As2+δ, we effectively eliminate the iron impurities and improve the transport critical current density of the tape to Jc(4.2 K, 10 T)=9.59×104 A/cm2. A reaction model is proposed to explain the formation mechanism of the iron particles. © 2023, The Authors. All rights reserved.

关键词： Iron-based Superconductors

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