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6th International Conference on Signal Processing and Machine Learning, SPML 2023

作者： Hua, Guansen Wang, Yuanzhang Lin, Yihang Fujian Key Laboratory of Optoelectronic Technology and Devices Xiamen University of Technology Xiamen361024 China

ISBN: (纸本)9798400707575

In this paper, a fast face marker detector for head radiotherapy patient posing is investigated. The 3D coordinate data of feature points of head radiotherapy patients' faces are collected by an RGB-D camera, and the 3D coordinate data of feature points of head radiotherapy patients' faces are extracted for fast face marking using a face feature point matching algorithm with a lightweight backbone network model. By comparing the marked patient head feature point data with the real-time data of the head of radiotherapy patients, the comparison error is used as the basis for the pose operation. The results show that the detector can achieve the desired positional effect. Therefore, this detector can meet the clinical demand for a short time and high precision posing system for precise radiotherapy. © 2023 ACM.

关键词： Radiotherapy

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The emergence of electron spin in interdisciplinary research in chemistry

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National Science Review 2024年第9期11卷 7-8页

作者： Shang-Da Jiang Li-Zhu Wu Song Gao Spin-X Institute School of Chemistry and Chemical Engineering State Key Laboratory of Luminescent Materials and Devices Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials South China University of Technology Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education Guangdong Basic Research Center of Excellence for Functional Molecular EngineeringSchool of Chemistry IGCME Sun Yat-Sen University Beijing National Laboratory of Molecular Science Beijing Key Laboratory of Magnetoelectric Materials and Devices College of Chemistry and Molecular Engineering Peking University

Spin chemistry, by definition, deals with the effects of electron and nuclear spins in the chemical context, and phenomenologically includes all kinds of observations regarding rates and yields of chemical reactions and properties of molecules that are related to the magnetic field. The development of spin chemistry calls for joint efforts involving research communities spanning physics, chemistry, biology, materials science and information science, and will play a crucial role in scientific and technologic innovations. Electron spins in paramagnetic molecules have provided a unique degree of freedom in the study of the physical and chemical properties of molecules.

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Automatic Segmentation of Diabetic Macular Edemas and ILM-RPE Layers in Retinal OCT Images Based on MFANet 23

Automatic Segmentation of Diabetic Macular Edemas and ILM-RP...

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9th International Conference on Computing and Artificial Intelligence, ICCAI 2023

作者： Liu, Shuang Wu, Jun Xiao, Zhitao Geng, Lei Zhang, Fang School of Electronics and Information Engineering Tianjin Key Laboratory of Optoelectronic Detection Technology and System TianGong University Tianjin300387 China School of Life Sciences Tianjin Key Laboratory of Optoelectronic Detection Technology and System TianGong University Tianjin300387 China

ISBN: (纸本)9781450399029

Aiming at the problems of blurred boundary and low segmentation accuracy of existing retinal OCT image segmentation methods, this paper designs a MFANet semantic segmentation model based on encode-decoder for the purpose of accurate segmentation of diabetic macular edemas and ILM-RPE layers, and proposes an automatic retinal OCT image segmentation method based on this model. This method takes the DeepLabV3+ network as the main body and improves the dilated convolution part, which can fully extract the multiscale features of the lesions and obtain a large enough receptive field to effectively balance the local and global information of the retina;the decoder increases the attention feature integration module, reduces information reduction and enlarges the global dimension interaction feature. The introduced global attention effectively strengthens the model’s learning of important features of retinal image. The experimental results show that the proposed method has better segmentation effect than the existing methods, and the MIoU reaches 85.82%. It can extract the macular edema regions quickly and accurately, identify the boundary information better, and provide a quantitative analysis tool for clinical diagnosis and treatment. © 2023 Copyright held by the owner/author(s).

关键词： Semantic Segmentation

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Subpixel-based Bidirectional Distortion Correction for Two-dimensional Astronomical Fiber Spectral Images

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Research in Astronomy and Astrophysics 2025年第3期25卷 48-59页

作者： Dong-Sheng Hu Chuan-Qi Chen Hao-Jie Yang An-Zhi Wang Gang Yue Zhao-Xv Gan Xu-Dong Chen Yun-Xiang Yan Yue Zhong Zhi Xu Zhong-Quan Qu Peng-Fei Wang Tao Geng Shuang Chen Wei-Min Sun Key Laboratory of Photonic Materials and Devices Physics for Oceanic Applications Ministry of Industry and Information Technology of China College of Physics and Optoelectronic Engineering Harbin Engineering University Key Laboratory of In-Fiber Integrated Optics of Ministry of Education College of Physics and Optoelectronic Engineering Harbin Engineering University Qingdao Innovation and Development Center of Harbin Engineering University Yunnan Observatory of Chinese Academy of Sciences State Key Laboratory of Aerodynamics China Aerodynamics Research and Development Center

This paper proposes a subpixel transformation method to correct keystone and Smile distortions in fiber spectral images from the Fiber Arrayed Solar Optical Telescope. These distortions affect the spatial and spectral positions,degrading resolution and accuracy. To correct keystone distortion, we use a local summation and peak-finding method to locate central horizontal coordinates, calculate shifting values, and straighten the curves. For Smile distortion, we use quartic polynomial fitting based on absorption lines at different wavelengths. This technique preserves subpixel components, redistributes pixel values, and interpolates non-fiber portions, rectifying the spectra for accurate analysis. The method can also be applied to other astronomical projects like Large Sky Area MultiObject Fiber Spectroscopic Telescope, enhancing the accuracy and reliability of spectral data in various astronomical studies.

关键词： methods: miscellaneous techniques: image processing techniques: miscellaneous techniques: spectroscopic

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Back contact interfacial modification mechanism in highly-efficient antimony selenide thin-film solar cells

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Journal of Energy Chemistry 2023年第5期80卷 256-264,I0007页

作者： Junhui Lin Guojie Chen Nafees Ahmad Muhammad Ishaq Shuo Chen Zhenghua Su Ping Fan Xianghua Zhang Yi Zhang Guangxing Liang Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Univ Rennes CNRSISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Rennes F-35000France Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai UniversityTianjin 300350China

Antimony selenide(Sb_(2)Se_(3))is a potential photovoltaic(PV)material for next-generation solar cells and has achieved great development in the last several *** properties of Sb_(2)Se_(3)absorber and back contact influence the PV performances of Sb_(2)Se_(3)solar ***,optimization of back contact characteristics and absorber orientation are crucial steps in raising the power conversion efficiency(PCE)of Sb_(2)Se_(3)solar *** this work,MoO2was introduced as an intermediate layer(IL)in Sb_(2)Se_(3)solar cells,and comparative investigations were *** growth of(211)-oriented Sb_(2)Se_(3)with large grains was facilitated by introducing the MoO2IL with suitable *** MoO2IL substantially lowered the back contact barrier and prevented the formation of voids at the back contact,which reduced the thickness of the MoSe2interface layer,inhibited carrier recombination,and minimized bulk and interfacial defects in ***,significant optimization enhanced the open-circuit voltage(VOC)of solar cells from 0.481 V to 0.487 V,short-circuit current density(JSC)from 23.81 m A/cm^(2)to 29.29 m A/cm^(2),and fill factor from 50.28%to 57.10%,which boosted the PCE from 5.75%to 8.14%.

关键词： Sb_(2)Se_(3)solar cells MoO_(2)intermediate layer Back contact Defects

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Design and technology review of the solar X-ray detector onboard the Macao Science Satellite-1B

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Science China(Technological Sciences) 2024年第11期67卷 3365-3380页

作者： ZUO FuChang SHI YongQiang CHEN JianWu ZHANG XiaoPing FU WeiChun CHANG Ye GAI FangQin LIU SiYuan XIONG Yan ZHANG HaiLi SUN Yan WANG Li ZHENG Ran LI LianSheng MEI ZhiWu HUANG He ZHA GangQiang ZHANG KeKe Space Optoelectronic Measurement and Perception Lab. Beijing Institute of Control EngineeringBeijing 100190China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Radiation Detection Materials and Devices Northwestern Polytechnical UniversityXi’an 710072China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China

On May 21,2023,the Macao Science Satellite-1B(MSS-1B),a low-inclination,low-latitude,and high-precision scientific exploration satellite for geomagnetic fields and space environments,was successfully *** solar X-ray detector(SXD),one of the two major scientific payloads onboard the MSS-1B,has obtained a large amount of solar X-ray radiation data,which reveals the distribution law of the magnetic field in the low Earth orbit,as well as the coupling law of the Earth's magnetic field and the solar radiation and energy particle ***,the overall design of the multi-detection-unit,broad-energy-range,small-volume,and low-power SXD was implemented to achieve the scientific objectives of the ***,the technical indicators of the instrument were decomposed into various components,and the key technologies,such as collimator,processing circuit,thermal,and payload dataset designs,were ***,the backgrounds,including electronic noise,cosmic diffuse X-ray background,and high-energy background in the Earth's radiation belts in and out of the field of view,were analyzed for the ***,the ground calibrations of the energy response,detection efficiency,and temperature-dependent peak drift of the SXD flight model were ***,the in-orbit temperature,energy spectrum data,background,and solar flare process observation of the instrument in the in-orbit test stage are presented,verifying the instrument design,analysis,and ground calibration,providing a foundation for obtaining accurate solar X-ray radiation data,and achieving the scientific objectives of the satellite.

关键词： Macao Science Satellite-1B solar X-ray detector design and development solar flare technology review

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Unipolar p-type monolayer WSe_(2) field-effect transistors with high current density and low contact resistance enabled by van der Waals contacts

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Nano Research 2024年第11期17卷 10162-10169页

作者： Miaomiao Li Xinyu Zhang Zimei Zhang Gang Peng Zhihong Zhu Jia Li Shiqiao Qin Mengjian Zhu College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-optoelectronic Information Materials and Devices National University of Defense Technology Changsha 410073 China Nanhu Laser Laboratory National University of Defense Technology Changsha 410073 China Hunan Key Laboratory of Two-Dimensional Materials and State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China College of Science & Hunan Key Laboratory of Extreme Matter and Applications National University of Defense Technology Changsha 410073 China

High-performance field-effect transistors (FETs) based on atomically thin two-dimensional (2D) semiconductors have demonstrated great promise in post-Moore integrated circuits. However, unipolar p-type 2D semiconductor transistors yet remain challenging and suffer from low saturation current density (less than 10 µA·µm^(−1)) and high contact resistance (larger than 100 kΩ·µm), mainly limited by the Schottky barrier induced by the mismatch of the work-functions and the Fermi level pinning at the metal contact interfaces. Here, we overcome these two obstacles through van der Waals (vdW) integration of high work-function metal palladium (Pd) as the contacts onto monolayer WSe2 grown by chemical vapor deposition (CVD) method. We demonstrate unipolar p-type monolayer WSe2 FETs with superior device performance: room temperature on-state current density exceeding 100 µA·µm^(−1), contact resistance of 12 kΩ·µm, on/off ratio over 107, and field-effect hole mobility of ~ 103 cm2·V^(−1)·s^(−1). Electrical transport measurements reveal that the Fermi level pinning effect is completely effectively eliminated in monolayer WSe2 with vdW Pd contacts, leading to a Schottky barrier-free Ohmic contact at the metal-semiconductor junctions. Combining the advantages of large-scale vdW contact strategy and CVD growth, our results pave the way for wafer-scale fabrication of complementary-metal-oxide-semiconductor (CMOS) logic circuits based on atomically thin 2D semiconductors.

关键词： two-dimensional(2D)field-effect transistors(FETs) monolayer WSe2 van der Waals(vdW)contact on-state current hole mobility

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Hybrid coating SnO_(2)for enhanced Li ions storage

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Chinese Chemical Letters 2023年第12期34卷 396-400页

作者： Yanan Gao Jie Liu Chenjie Lou Hailiang Geng Jipeng Fu Chengyu Li Yongjin Chen Cong Wang Wenda Zhang Xiaojun Kuang Yifan Liu Xiang Gao Mingxue Tang School of Physical Science and Technology Inner Mongolia UniversityHohhot 010000China Center for High Pressure Science and Technology Advanced Research Beijing 100193China Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesHangzhou 310018China College of Mathematics and Physics Bejing University of Chemical TechnologyBejing 100029China MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi Key Laboratory of Optic and Electronic Materials and DevicesCollege of MaterialsGuilin 541100China

Anode SnO_(2)in lithium-ion batteries suffers from volume expansion and ***,the SnO_(2)nanoparticles are hybrided with ZrO_(2)particles by the support of carbon nanotube *** obtained SnO_(2)/C/ZrO_(2)composite shows improved electrochemical *** reveal that the carbon nanotubes shorten the transmission path of electrons and Li^(+) *** milling with ZrO_(2)promotes the formation of nanosized SnO_(2)to weaken the internal strain change,being beneficial to buffering volume change during electrochemical cycling ***-resolution 6.7Li NMR investigations indicate that conversion and alloying reactions are stepwise involved for SnO_(2)/C/ZrO_(2)*** strategy of designing SnO_(2)/C/ZrO_(2)composite from the morphology-controlled metal-organic frameworks for energy storage widens the possibility to fabricate promising materials with enhanced performances.

关键词： Hybrid regulation Lithium-ion batteries Fast migration Volume confinement Energy storage

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Isovalent co-alloying contributes to considerable improvement in thermoelectric performance of BiSe bulks with weak anisotropy

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Journal of Materiomics 2024年第5期10卷 965-974页

作者： Fu Li Chen Liu Mohammad Nisar Jian Zhao Chongbin Liang Junze Zhang Ziyuan Wang Zhuanghao Zheng Ping Fan Xilin Wang Zhen-Hua Ge Yue-Xing Chen Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060GuangdongChina Kunming University of Science and Technology Kunming650093China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen518060GuangdongChina

BiSe with intrinsic low thermal conductivity has considered as a promising thermoelectric(TE)material at nearly room *** improve its low thermoelectric figure of merit(zT),in this work,Sb and Te isovalent co-alloying was performed and significantly optimized its TE property with weakly anisotropic *** substituting Sb on Bi sites,the carrier concentration is suppressed by introduction of Sbsingle bond Se site defects,which contributes to the increased absolute value of Seebeck coefficient(|S|).Further co-alloying Te on Se of the optimized composition Bi_(0.7)Sb_(0.3)Se,the carrier concentration increased without affecting the|S|due to the enhanced effective mass,which leads to a highest power factor of 12.8μW/(cm·K^(2))at 423 *** a result,a maximum zT of∼0.54 is achieved for Bi_(0.7)Sb_(0.3)Se_(0.7)Te_(0.3) along the pressing direction and the average zT(zTave)(from 300 K to 623 K)are drastically improved from 0.24 for pristine BiSe sample to ***,an energy conversion efficiency∼4.0%is achieved for a single leg TE device of Bi_(0.7)Sb_(0.3)Se_(0.7)Te_(0.3)when applied the temperature difference of 339 K,indicating the potential TE application.

关键词： BiSe Isovalent alloying zT Carrier modulation

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Tunable topological electric filter 4

Tunable topological electric filter

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4th International Computational Imaging Conference, CITA 2024

作者： Qi, Yingxin Wang, Hanyu Yang, Biao Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices National University of Defense Technology Changsha China

ISBN: (纸本)9781510688834

LC circuit are widely used in field attached to topology in the decades, plenty of effects and phenomena are observed in such system. However, most of the topological LC circuit system can only change the topological invariant with variable, while frequency of band structure shift slightly and the shape of band structure remains unchanged. We develop a design of LC circuit system inspired by the Su-Schrieffer-Heeger (SSH) model, in which design not only the topological invariant can be changed, but also the shape of band structure can be transformed thoroughly with two independent variables. Our work demonstrates the edge states under the circumstance of topological nontrivial, and also confirms the theoretical results by simulation of the circuit. Moreover, we propose the potential direction of the circuit to be a tunable filter, which is not limited to the single type of bandpass or band-stop filter. © 2025 SPIE.

关键词： Topology

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