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6th Conference on Frontiers in Optical Imaging and technology: Imaging Detection and Target Recognition

作者： Xuan, Zhang Shangmin, Lin Hu, Wang Ming, Gao Zhen, Wang Yu, Jin Jiang, Qiao Yunqiang, Lai Wenlong, He Yaoke, Xue Xi'an Technological University No.2 Xuefuzhonglu Road Shaanxi Xi'an710021 China Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Science No.17 Xinxi Road Shaanxi Xi'an710119 China University of Chinese Academy of Sciences No.1 Yanqihu East Rd Huairou District Beijing101408 China Xi’an Space Sensor Optical Technology Engineering Research Center No.17 Xinxi Road Shaanxi Xi'an710119 China Key Laboratory of Space Precision Measurement Technology Chinese Academy of Sciences No.17 Xinxi Road Shaanxi Xi'an710119 China Beijing University of Aeronautics and Astronautics Beijing100191 China Youth Innovation Promotion Association Beijing10029 China

ISBN: (数字)9781510679733

ISBN: (纸本)9781510679726

When the large-aperture antenna pose is measured by the laser method, the subreflector has a strong energy due to the convergence of the antenna itself and the instability of the near-ground atmosphere, and then the laser signal is easily drowned out. Atmospheric attenuation and other factors will weaken the laser transmission in different spectral bands, which reduces the recognition accuracy of laser spots. Aiming at the research of measuring the laser spectrum of large-aperture antenna, this paper analyzes the influence of atmospheric attenuation on the signals of different laser spectrum bands under the fixed distance of subreflector measurement, and compares the solar radiation energy of different wavelengths in laser. Finally, the stray light simulation analysis and experiments are carried out on different laser working spectrum bands to verify the accuracy of the spectrum research used in antenna measurement. Experiments show that the 1064 nm wavelength spectrum, as the working spectral band of the antenna measurement, the spot information is more obvious, which can effectively realize the extraction and identification of the spot center and provide a strong guarantee for the antenna pose measurement. © 2024 SPIE. All rights reserved.

关键词： Stray light

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Aza-BODIPY molecular assembly at the liquid-solid interface driven by Br…F-BF interactions

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Chinese Chemical Letters 2021年第11期32卷 3566-3569页

作者： Yuchuan Xiao Fangjian Cai Xuan Peng Xiyuan Kang Peng Lei Xin Li Haijun Xu Xunwen Xiao Bin Tu Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China School of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453002China

In this work,two aza-BODIPY derivatives,3,5-diphenyl-1,7-di(p-dodecyloxyphenyl)-aza-BODIPY(CJF)and 3,5-di(p-bromophenyl)-1,7-di(p-dodecyloxyphenyl)-aza-BODIPY(2Br-CJF)acted as model molecules to form the self-assembly monolayers on the solid-liquid *** the utilizing of scanning tunnelling microscope(STM),we demonstrated that intermolecular Br…F-BF interactions existed in 2Br-CJF self-assembly structure and played an important role in strengthening the stability of 2Br-CJF self-assembly *** result is supported by density functional theory(DFT)calculation.

关键词： Aza-BODIPY STM Br…F interaction Self-assembly Surface assembly

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Retrospective motion correction for Fast Spin Echo based on conditional GAN with entropy loss 4

Retrospective motion correction for Fast Spin Echo based on ...

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2021 4th International Conference on Advanced Algorithms and Control engineering, ICAACE 2021

作者： Chen, Yalei Li, Pingan Liu, Kewen Bao, Qingjia Li, Zhao Li, Xiaojun Information and Communication Engineering Wuhan University of Technology Wuhan Hubei430070 China Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks Wuhan University of Technology Wuhan430070 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Center for Magnetic Resonance Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Wuhan430071 China Department of Chemical and Biological Physics Weizmann Institute of Science Rehovot Israel

We proposed a new end-to-end motion correction method based on conditional generative adversarial network (GAN) and minimum entropy of MRI images for Fast Spin Echo (FSE) sequence. The network contains an encoder-decoder generator to generate the motion-corrected images and a PatchGAN discriminator to classify an image as either real (motion-free) or fake(motion-corrected). Moreover, the image's entropy is set as one loss item in the cGAN's loss as the entropy increases monotonically with the motion amplitude, indicating that entropy is a good criterion for motion. The results show that the proposed method can effectively reduce the artifacts and obtain high-quality motion-corrected images from the motion-affected images in both pre-clinical and clinical datasets. © Published under licence by IOP Publishing Ltd.

关键词： Generative adversarial networks

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Computation simulation and experiment investigations of stable co-doping perovskite solar cells with TiO2/SnO2 bilayer and CuSCN structures

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Journal of Alloys and Compounds 2025年 1032卷

作者： Li, Guangdong Xu, Mingxiang Bai, Qingwang Zou, Xiaoping Bai, Xiao School of Physics Southeast University Nanjing211189 China Beijing Advanced Innovation Center for Materials Genome Engineering Research Center for Sensor Technology Beijing Key Laboratory for Sensor MOE Key Laboratory for Modern Measurement and Control Technology School of Applied Sciences Beijing Information Science and Technology University Jianxiangqiao Campus Beijing100101 China

The charge transport layers play a momentous role in facilitating the extraction and injection of carriers in perovskite solar cells (PSCs). Unfortunately, the performance of PSCs fabricated with conventional charge transport materials exhibits significant hysteresis and instability. Here we utilise the composite TiO₂/SnO₂ with superior electron mobility and stability and the low-cost CuSCN as bilayer electron transport layer (ETL) and hole transport layer (HTL) materials, respectively. The PSCs with the p-n-n (p-type FAxMA1-xPbIxBryCl3-x-y (FA=CH(NH2)2), MA=CH3NH3)-n-type SnO2-n-type TiO2) construction of FTO/TiO2/SnO2/FAxMA1-xPbIxBryCl3-x-y/CuSCN/C/FTO have been investigated via the computation simulation and experiment. It has been observed that the PSCs performance of p-n-n structure surpasses that of n-n-p (n-type SnO2-n-type TiO2-p-type FAxMA1-xPbIxBryCl3-x-y) structure, benefiting from the existence of the bilayer ETL with p-n-n structure, which improves the collection ability, and the lifetime and mobility of photogenerated carriers. The perovskite thin film can be uniformly covered by the CuSCN HTL with 25 μL CuSCN drop-coating solution, which effectively reducing the hysteresis of the device under the atmosphere conditions during the experiment. Furthermore, we further demonstrate that the thickness of functional layers, conduction band offset, doping concentration, and operating temperature play crucial roles in determining the photophysical and photoelectric properties of PSCs. The simulation results imply that the PSCs we designed and optimized not only have high power conversion efficiency (PCE) (17.7619 %) at 295 K but also maintain ascendant stability. This work shall provide up an effective strategy for the realization of high efficiency and long-term stable carbon-based PSCs. © 2025 Elsevier B.V.

关键词： Titanium dioxide

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Original Structural and Electrical Investigation for a New mathbf{BG-F}-{6} Vitreous Bio-Ceramic as Humidity sensors 17

Original Structural and Electrical Investigation for a New m...

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17th International Multi-Conference on Systems, Signals and Devices, SSD 2020

作者： Gharbi, A. Kallel, A.Y. Bouhamed, A. Al-Hamry, A. Kanoun, O. Derbel, N. University of Paris 1 LSPM CNRS-UPR 9001 Villetaneuse France Technische Universittä T Chemnitz Measurement and Sensor Technology Chemnitz Germany University of Sfax Control Energy Management Laboratory National Engineering School of Sfax Tunisia

ISBN: (纸本)9781728110806

Two biomaterial types have been the focus of sensor applications: Fluorosilicate bioactive Glass \text{BG}-\mathrm{F}-{6} crude and compact. Of the two, \text{BG}-\mathrm{F}-{6} compact material show the greater mechanical strength, and electrical behaviour provoke greater humidity sensing capacity. Thus, the glassy discs show great potential for deployment in a new generation of biosensors and environment requires. The aim of this paper is to develop a material that combines an interesting mechanical strength, monophasic stability with potential thermic resistance and great electrical capacity. By returning to its high temperature synthesis protocol, makes this fluorosilicate glass an attractive material for sensors development topic and environmental precautions. © 2020 IEEE.

关键词： Capacitive sensors

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PenAAc-based interfacial passivation to reduce voltage loss and defect densities in lead-free perovskite solar cells

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Journal of Applied Physics 2025年第21期137卷

作者： Guo, Jun Liu, Yu Chen, Xinyao Cheng, Jin Zhao, Longjiang Li, Junming Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science and Technology University Beijing100192 China Beijing Key Laboratory for Sensor School of Science Beijing Information Science and Technology University Beijing100101 China Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument Beijing Information Science and Technology University Beijing100192 China College of Engineering Qufu Normal University Rizhao276826 China

Tin-based perovskites are considered a promising alternative to lead-based perovskites due to their low toxicity and suitable optical bandgap. However, the defects and voltage loss issues severely limit their device performance. In this study, an interfacial passivation strategy based on pentylammonium acetate (PenAAc) was proposed in tin-based perovskite solar cells. The PenAAc-modified layer can effectively improve the perovskite film morphology, crystallinity, and hydrophobicity. Meanwhile, the introduction of the PenAAc layer can significantly inhibit carrier complexation and reduce the hysteresis effect in solar cells. By systematically analyzing the charge transport and compounding mechanisms, the PenAAc layer enhances the built-in electric field, improves the carrier separation and the carrier extraction efficiency, and reduces the defect density in the perovskite layer. The optimal tin-based perovskite solar cell achieved a power conversion efficiency of 7.0%. Moreover, the PenAAc-modified device maintained above 89% of its initial efficiency even after 1200 h storage in a nitrogen-filled glovebox. © 2025 Author(s).

关键词： Defect density

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Tonic-Myoclonic Epileptic Seizure Classification based on Surface Electromyography

Tonic-Myoclonic Epileptic Seizure Classification based on Su...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Achraf Djemal Dhouha Bouchaala Ahmed Fakhfakh Olfa Kanoun Chair of Measurement and Sensor Technology Chemnitz University of Technology Chemnitz University Germany National Engineering School of Sfax University of Sfax Tunisia Laboratory of Signals Systems Artificial Intelligence and Networks Digital Research Center of Sfax University of Sfax Tunisia

Epilepsy diagnosis is one of the critical subjects of research in health fields in recent years. The aim of this paper is to detect and classify two types of seizures: Tonic and myoclonic based on surface electromyography signals. Based on data from eight sEMG electrodes on the biceps brachii, flexor carpi ulnaris, gastrocnemius and quadriceps muscle. Several time domain features were investigated, including waveform length, mean absolute value, variance, mobility, complexity, kurtosis, skewness, simple square integral, integrated EMG, root mean square, average amplitude change, standard deviation and entropy. These features are used as inputs to the Artificial Neural Network (ANN) classifier to determine if a data segment corresponds to a seizure or not. Following the development of the ANN model, an evaluation performance in terms of accuracy is presented to validate the results, which reached an accuracy of 93.33%. The overall performance of the presented machine learning algorithm is sufficient for clinical implementation.

关键词： Machine learning algorithms Surface waves Epilepsy Artificial neural networks Muscles Electromyography Classification algorithms

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Growth of TlBa_2Ca_2Cu_3O_9 Epitaxial Thin Films by Two-Step Method in Argon

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Chinese Physics Letters 2019年第5期36卷 79-83页

作者： Jian Xing Li-Tian Wang Xiao-Xin Gao Xue-Lian Liang Kai-Yong He Ting Xue Sheng-Hui Zhao Jin-Li Zhang Ming He Xin-Jie Zhao Shao-Lin Yan Pei Wang Lu Ji College of Electronic Information and Optical Engineering Nankai UniversityTianjin 300350 Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin 300350 Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350 Beijing Institute of Radio Measurement Beijing 100854

TlBa_2 Ca_2 Cu_3 O_9(Tl-1223) films have promising applications due to their high critical temperature and strong magnetic flux pinning. Nevertheless, the preparation of pure phase Tl-1223 film is still a challenge. We successfully fabricate Tl-1223 thin films on LaAlO_3(001) substrates using dc magnetic sputtering and a post annealing two-step method in argon atmosphere. The crystallization temperature of Tl-1223 films in argon is reduced by 100℃ compared to that in oxygen. This greatly reduces the volatilization of Tl and improves the surface morphology of films. The lower annealing temperature can effectively improve the repeatability of the Tl-1223 film preparation. In addition, pure Tl-1223 phase can be obtained in a broad temperature zone,from 790℃ to 830℃. In our study, the films show homogenous and dense surface morphology using the presented method. The best critical temperature of Tl-1223 films is characterized to be 110 K, and the critical current J_c(77 K, 0 T) is up to 2.13 × 106 A/cm^2.

关键词： Ba Cu Ca

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A Secure and Efficient Login and Data Exchange Scheme for an IoT laboratory Management System 6

A Secure and Efficient Login and Data Exchange Scheme for an...

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6th IEEE World Forum on Internet of Things, WF-IoT 2020

作者： Houssaini, Dhouha El Khriji, Sabrine Mukhtar, Muhammad Waseem Derbel, Faouzi Besbes, Kamel Kanoun, Olfa National School of Engineers of Sfax University of Sfax Tunisia Measurement and Sensor Technology University of Technology of Chemnitz Germany Microelectronics and Instrumentation Laboratory Faculty of Sciences of Monastir Tunisia Centre for Reaserch on Microelectronics and Nanotechnolgy Technopark of Sousse Tunisia Faculty of Electrical Engineering and Information Technology Leipzig University of Applied Sciences Germany

ISBN: (数字)9781728155036

ISBN: (纸本)9781728155036

Following the advance in the Internet of Things (IoT), several communication and data exchange protocols are emerging, where the security has become a major concern. Moreover, IoT system are composed of small and resource-constrained embedded devices. These devices are limited in terms of memory, computation, power and energy. This makes them vulnerable to a large number of attacks. Hence, security is becoming more critical as IoT systems automate critical applications, such as laboratory data control. In this work a laboratory management system based on IoT is developed. Investigation on the security and privacy of login and data exchange management schemes are carried out. The proposed security scheme is provided on two levels: users credentials and client to server communication. © 2020 IEEE.

关键词： Electronic data interchange

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Simulation and measurement of millimeter-wave radiation from Josephson junction array

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Chinese Physics B 2019年第6期28卷 87-90页

作者： Xin Zhang Sheng-Hui Zhao Li-Tian Wang Jian Xing Sheng-Fang Zhang Xue-Lian Liang Ze He Pei Wang Xin-Jie Zhao Ming He Lu Ji College of Electronic Information and Optical Engineering Nankai UniversityTianjin 300350China Beijing Institute of Radio Measurement Beijing 100854China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin 300350China

We report the circuit simulations and experiments of millimeter-wave radiation from a high temperature superconducting(HTS) bicrystal Josephson junction(BJJ) array. To study the effects of junction characteristic parameters on radiation properties, new radiation circuit models are proposed in this paper. The series resistively and capacitively shunted junction(RCSJ) models are packaged into a Josephson junction array(JJA) model in the simulation. The current-voltage characteristics(IVCs) curve and radiation peaks are simulated and analyzed by circuit models, which are also observed from the experiment at liquid nitrogen temperature. The experimental radiation linewidth and power are in good agreement with simulated results. The presented circuit models clearly demonstrate that the inconsistency of the JJA will cause a broad linewidth and a low detected power. The junction radiation properties are also investigated at the optimal situation by circuit simulation. The results further confirm that the consistent JJA characteristic parameters can successfully narrow the radiation linewidth and increase the power of junction radiation.

关键词： high temperature superconducting(HTS) Josephson junction array radiation circuit model simulation

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