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Near-infrared optoelectronic synapses based on a Te/α-In2Se3 heterojunction for neuromorphic computing

Science China(Information Sciences) 2023年第6期66卷 53-62页

作者： Tao YAN yuchen cai Yanrong WANG Jia YANG Shuhui LI Xueying ZHAN Fengmei WANG Ruiqing CHENG Feng WANG Jun HE Zhenxing WANG CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationBeijing University of Chemical Technology Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University

Neuromorphic computing based on artificial optoelectronic synapses has attracted considerable attention owing to its high time/power efficiency and parallel processing capability. However, existing devices are mainly suitable for only the visible range. Here, high-performance near-infrared optoelectronic memories and synapses were demonstrated using Te/α-In2Se3heterostructures. Owing to the entangled ferroelectricitysemiconducting properties of α-In2Se3, whose ferroelectric polarizations can be switched by photocarriers that migrated from the Te near-infrared light absorber, the device could be set into a non-volatile highresistance/low-resistance state through the application of positive gate voltages/near-infrared light ***, the device could function as a high-performance photodetector, with a photoresponsive on/off ratio of 5.25 × 104/8.3 × 103and a specific detectivity of 2.6 × 1011/7.5 × 1010Jones at 1550/1940 nm. In addition,the device could function as a multi-state optoelectronic synapse with good stability and high linearity;moreover, using the device, we developed an optoelectronic artificial neural network with high recognition accuracies of 100% and 89.9% for a database composed of 64-pixel letters with 10% and 70% noise levels,respectively. Our work provides a feasible avenue for developing neuromorphic networks applicable in the infrared range.

关键词： near infrared phototransistor two-dimensionalferroelectric semiconductor artificial neural networks optoelectronicsynapses

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Ultrasensitive solar-blind ultraviolet detection and optoelectronic neuromorphic computing using α-In_(2)Se_(3)phototransistors

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Frontiers of physics 2023年第3期18卷 81-90页

作者： yuchen cai Jia Yang Feng Wang Shuhui Li Yanrong Wang Xueying Zhan Fengmei Wang Ruiqing Cheng Zhenxing Wang Jun He CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China

Detection of solar-blind ultraviolet(SB-UV)light is important in applications like confidential communication,flame detection,and missile warning ***,the existing SB-UV photodetectors still show low *** this work,we demonstrate the extraordinary SB-UV detection performance of α-In_(2)Se_(3 )*** from the coupled semiconductor and ferroelectricity property,the phototransistor has an ultraweak detectable power of 17.85 fW,an ultrahigh gain of 1.2×10^(6),a responsivity of 2.6×10^(5) A/W,a detectivity of 1.3×10^(16) Jones and an ultralow noise-equivalent-power of 4.2×10^(–20 )W/Hz1/2 for 275 nm *** performance exceeds most other UV detectors,even including commercial photomultiplier tubes and avalanche *** can be also implemented as an optoelectronic synapse for neuromorphic computing.A 784×300×10 artificial neural network(ANN)based on this optoelectronic synapse is constructed and demonstrated with a high recognition accuracy and good noise-tolerance for the Fashion-MNIST *** extraordinary features endow this phototransistor with the potential for constructing advanced SB-UV detectors and intelligent hardware.

关键词： solar-blind ultraviolet detectors α-In_(2)Se_(3) optoelectronic synapse neuromorphic computing

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New Progresses in Lao Satellite Project

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Aerospace China 2015年第2期16卷 52-53页

作者： ZHAO Yang cai yuchen ZHANG Hao

The construction of the Lao telecommunications satellite ground station was completed and passed its initial acceptance by a working group assigned by Lao Government in *** station is located on the Mekong River *** station covers 12 hectares,of which 10000m2 are construction *** completion and acceptance of the ground station marked progress in the Lao telecommunications satellite project,laying the foundation for the follow-on Laosat-1 TT&C system and equipment installation and debugging.

关键词： acceptance completion completed installation banks passed launch laying assigned marked

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Prognostic value of programmed death.1, programmed death-ligand 1, programmed death-ligand 2 expression, and CD8(+) T cell density in primary tumors and metastatic lymph nodes from patients with stage T1.4N+M0 gastric adenocarcinoma

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Chinese Journal of Cancer 2017年第11期36卷 560-573页

作者： Yuan Gao Su Li Dazhi Xu Shangxiang Chen yuchen cai Wenqi Jiang Xinke Zhang Jin Sun Kefeng Wang Boyang Chang Fenghua Wang Minghuang Hong Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou 510060GuangdongP.R.China Department of Clinical Trial Center Sun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China Department of Gastric Surgery Sun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China Department of Medical Oncology Sun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China Department of Pathology Sun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China Department of Image‑guided Minimally Invasive Therapy Sun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China.

Background: Anti-programmed death-1/programmed death-ligand 1(PD-1/PD-L1) immunotherapy has been proved to be effective on gastric cancer in ongoing clinical trials. However, the value of PD-L1 in predicting responses of patients with gastric cancer to anti-PD-1/PD-L1 immunotherapy is controversial. Some studies suggested that intra-and inter-tumoral heterogeneity of PD-L1 expression might explain the *** study aimed to analyze the expression of PD-L1, PD-L2, and PD-1 as well as CD8(+) T-cell density in primary tumors and lymph nodes from patients with stage T1-4 N+M0 gastric adenocarcinoma to explore the heterogeneity of PD-1 signaling pathway ***: In primary tumors and metastatic as well as non-metastatic lymph nodes from patients with stage T1-4 N+M0 gastric adenocarcinoma, we detected PD-L1 and PD-L2 expression with immunohistochemistry. CD8(+)T-cell density in primary tumors and PD-1 expression on CD8(+)T cells were detected with immunofluorescence. Univariate analysis was used to determine the prognostic values of them. Cox proportional hazard regression model was used to identify independent risk factors that affect patients' overall survival and disease-free ***: Among 119 eligible patients who had undergone surgical resection, the positive rate of PD-L1 was higher in metastatic lymph nodes than in primary tumors(45.4% vs. 38.7%, P = 0.005); the positive rate of PD-1 on CD8(+)T cells was significantly higher in primary tumors and metastatic lymph nodes than in tumor-free lymph nodes(both P < 0.001). The intensity of PD-1 expression on CD8(+) T cells in primary tumors and in metastatic lymph nodes were stronger than that in tumor-free lymph nodes from the same patient. Beside, the positive rate of PD-L2 did not show any differences between primary tumors and metastatic lymph nodes. In multivariate analysis, PD-L1 expression,PD-L2 expression, a low density of CD8(+) T cells in primary tumors, and PD-1 expression on CD8(+

关键词： Gastric cancer Programmed cell death-ligand 1 Programmed cell death-ligand 2 Programmed cell death-1 CD8(+) T cells Heterogeneity expression Prognostic value

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船舶产业基金——船舶融资方式的创新

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中国造船 2011年第4期52卷 229-239页

作者：蔡宇宸上海交通大学凯原法学院上海200240

2011年,上海航运产业基金管理公司的成立,将为船舶、航运业开辟新的融资途径。该文首先分析了上海航运金融服务现状,分别介绍了传统的船舶融资方式与新型的船舶融资方式,其次进一步分析船舶基金的三种国际典型模式,最后结合中国船舶产... 详细信息

2011年,上海航运产业基金管理公司的成立,将为船舶、航运业开辟新的融资途径。该文首先分析了上海航运金融服务现状,分别介绍了传统的船舶融资方式与新型的船舶融资方式,其次进一步分析船舶基金的三种国际典型模式,最后结合中国船舶产业基金,分析了上海航运产业基金的问题及发展。

关键词：船舶产业基金上海航运金融船舶融资

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Near-infrared optoelectronic synapses based on a Te/α-InSeheterojunction for neuromorphic computing

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Science China(Information Sciences) 2023年

作者： Tao YAN yuchen cai Yanrong WANG Jia YANG Shuhui LI Xueying ZHAN Fengmei WANG Ruiqing CHENG Feng WANG Jun HE Zhenxing WANG Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationBeijing University of Chemical Technology

Neuromorphic computing based on artificial optoelectronic synapses has attracted considerable attention owing to its high time/power efficiency and parallel processing capability. However, existing devices are mainly suitable for only the visible range. Here, high-performance near-infrared optoelectronic memories and synapses were demonstrated using Te/α-In2Se3heterostructures. Owing to the entangled ferroelectricitysemiconducting properties of α-In2Se3, whose ferroelectric polarizations can be switched by photocarriers that migrated from the Te near-infrared light absorber, the device could be set into a non-volatile highresistance/low-resistance state through the application of positive gate voltages/near-infrared light ***, the device could function as a high-performance photodetector, with a photoresponsive on/off ratio of5.25 × 104/8.3 × 103and a specific detectivity of 2.6 × 1011/7.5 × 1010Jones at 1550/1940 nm. In addition,the device could function as a multi-state optoelectronic synapse with good stability and high linearity;moreover, using the device, we developed an optoelectronic artificial neural network with high recognition accuracies of 100% and 89.9% for a database composed of 64-pixel letters with 10% and 70% noise levels,respectively. Our work provides a feasible avenue for developing neuromorphic networks applicable in the infrared range.

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Flexible Copper‑Doped Silica Fibers Promote Infected Conjunctival Tissue Repair Through Antibacterial and Anti‑inflammatory Effects

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Advanced Fiber Materials 2024年第1期6卷 278-296页

作者： Jie Cui yuchen cai Xiao Yu Yihong Shen Tianyi Zhou Binbin Sun Pengfei cai Zhengchao Yuan Muhammad Shafiq Mohamed EL‑Newehy Hany EL‑Hamshary Xingping Zhou Yao Fu Xiumei Mo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano‑Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversityShanghai 201620People’s Republic of China Department of Ophthalmology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011People’s Republic of China Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology Shanghai 200011People’s Republic of China Innovation Center of NanoMedicine Kawasaki Institute of Industrial Promotion3‑25‑14 Tono‑machiKawasaki‑kuKanagawa 210‑0821Japan United Graduate School of Drug Discovery and Medical Information Sciences Gifu University1‑1 YanagidoGifu 501‑1193Japan Department of Chemistry College of ScienceKing Saud UniversityP.O.Box 245511451 RiyadhSaudi Arabia

The conjunctiva is crucial in safeguarding the eye from harm or infection,thereby ensuring the preservation of the *** repair of infected conjunctival damage is *** objective of this study is to develop copper-doped flexible silica nanofibers(SiO_(2)@Cu NFs)with multifunctional antibacterial and anti-inflammatory *** continuous release of copper ions from electrospun membranes is shown to be effective to promote antibacterial and bioactive *** membranes also exhibit biocompatibility and promote cell growth,angiogenesis,and inflammation *** vivo evaluations further reveal the therapeutic efficacy of SiO_(2)@Cu NFs to promote the structural and the functional recoveries of the *** together,SiO_(2)@Cu NFs may hold significant promise for the fabrication of alterna-tive ocular bandage to suppress bacterial infection and promote repair of ocular tissues and may potential be also used for related disciplines.

关键词： Conjunctival reconstruction Inorganic nanofiber Bacterial infection Angiogenesis Anti-inflammation

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Nb对Zr基钎料及钎焊连接SiC陶瓷的影响

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材料导报 2022年第3期36卷 125-129页

作者：蔡雨晨冯可芹周博芳陈思潭四川大学机械工程学院成都610065 湖北汽车工业学院材料科学与工程学院湖北十堰442002

研究在Zr-20Cu钎料基础上添加元素Nb对钎料及SiC陶瓷钎焊接头微观结构和力学性能的影响。结果表明:添加Nb后钎料的相组成物主要是α-Zr、β-Zr、β-Nb和CuZr_(2),且随着Nb含量增加,晶界处的大尺寸第二相CuZr_(2)不断减少,从而提高了钎... 详细信息

研究在Zr-20Cu钎料基础上添加元素Nb对钎料及SiC陶瓷钎焊接头微观结构和力学性能的影响。结果表明:添加Nb后钎料的相组成物主要是α-Zr、β-Zr、β-Nb和CuZr_(2),且随着Nb含量增加,晶界处的大尺寸第二相CuZr_(2)不断减少,从而提高了钎料的耐腐蚀性;添加Nb钎料可有效地填充SiC陶瓷之间的间隙,且钎焊接头中无孔隙和裂缝;钎焊接头处形成了一定厚度的界面反应层,生成物质主要有ZrC、Zr_(2)Si、Nb_(2)C和Nb_(5)Si_(3);Nb_(2)C和Nb_(5)Si_(3)可降低钎焊接头的脆性,其与Nb的固溶强化共同作用,提高了接头的剪切强度。当Nb含量较低时,SiC陶瓷接头的剪切强度随Nb含量(0%~10%,质量分数,下同)的增加而提高,其中Nb含量为10%时,接头断口处存在大量韧窝,接头强度达到最大值(86 MPa);但当Nb含量继续增加到15%时,由于Nb过量导致钎料熔点升高,使得接头剪切强度有所降低。

关键词：碳化硅陶瓷锆铜铌钎料钎焊微观结构剪切强度

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利用热处理改善钒钛磁铁矿直接制备的铁基摩擦材料组织与性能

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材料导报 2021年第14期35卷 14120-14124,14129页

作者：陈思潭冯可芹张燕燕蔡雨晨四川大学机械工程学院成都610065

以攀枝花钒钛磁铁矿为原料,通过选择性碳热原位反应和真空烧结技术直接制备得到铁基摩擦材料。为进一步提高材料性能,本工作研究了淬火与回火处理对铁基摩擦材料组织和性能的影响。结果表明:900~1000℃淬火使材料基体组织由珠光体向马... 详细信息

以攀枝花钒钛磁铁矿为原料,通过选择性碳热原位反应和真空烧结技术直接制备得到铁基摩擦材料。为进一步提高材料性能,本工作研究了淬火与回火处理对铁基摩擦材料组织和性能的影响。结果表明:900~1000℃淬火使材料基体组织由珠光体向马氏体转变,硬度和摩擦性能随淬火温度的升高先提升后下降,在950℃时效果最佳,摩擦磨损行为由热处理前较严重的磨粒磨损和粘着磨损转变为磨粒磨损,且磨损程度降低。950℃淬火试样分别在250℃、500℃和650℃进行回火处理,基体组织随着温度的升高先由马氏体向低硬度屈氏体转变,而后转变为硬度更低的索氏体,但500℃回火时发生的回火二次硬化和碳化物的脱溶使得材料硬度提升,摩擦性能进一步提高,摩擦磨损行为表现为轻微的磨粒磨损。综合而言,950℃淬火+500℃回火处理后的铁基摩擦材料组织及性能最优,相比未热处理材料,硬度提高32%,磨损率降低61%,摩擦系数降低18%。

关键词：铁基摩擦材料钒钛磁铁矿淬火回火摩擦磨损

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地方高校研究生创业意向影响因素研究——基于个人特质的视角

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高等工程教育研究 2019年第2期67卷 178-182页

作者：袁旦孔晨辰蔡雨晨南京大学教育研究院浙江工业大学

从个人特质的视角构建了地方高校研究生创业意向影响因素关系模型,对1766名研究生进行问卷调查,探析高成就感、高自主性、风险承担、创新导向、创业态度和创业意向之间的关系。结果表明:地方高校研究生的高成就感对创业意向有显著负向影... 详细信息

从个人特质的视角构建了地方高校研究生创业意向影响因素关系模型,对1766名研究生进行问卷调查,探析高成就感、高自主性、风险承担、创新导向、创业态度和创业意向之间的关系。结果表明:地方高校研究生的高成就感对创业意向有显著负向影响;高自主性、风险承担、创新导向对创业意向有显著正向影响;创业态度是高成就感、创新倾向影响创业意向的中介变量。另外,创业意向在性别、专业、生源地、创业教育经历、参加创赛及获奖经历、父母创业经历、导师及其科研团队成员创业经历等因素上有显著差异。据此提出提升研究生创业意向水平及加强地方高校研究生创业教育的建议。

关键词：创业意向研究生地方高校影响因素

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