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Proton radiation effects on high-speed silicon Mach-Zehnder modulators for space application

Science China(Information Sciences) 2022年第12期65卷 301-312页

作者： Changhao HAN Zhaoyi HU Yuansheng TAO Engang fu Yandong HE Fenghe YANG Jun QIN xingjun WANG State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Institute of Microelectronics School of Integrated Circuits Peking University Peking University Yangtze Delta Institute of Optoelectronics Frontier Science Center for Nano-optoelectronics Peking University Peng Cheng Laboratory

In this paper, performance degradation effects on high-speed silicon Mach-Zehnder modulators under proton radiation were investigated for future space environment applications. The test devices were exposed to 3-MeV protons of three fluence levels(5×1013, 2×1014, and 5×1015ions/cm2), which is comparable to the radiation amount for operating in a harsh space environment after several decades. The performance of the silicon modulator after radiation was characterized in terms of modulation efficiency and eye *** results illustrate that the modulation efficiency is significantly reduced after proton radiation and shows an obvious decrease with increasing radiation fluence. The extinction ratios of the on-off keying(OOK) eye diagram are obviously dropped with increasing radiation fluence and correspond well to modulation efficiency degradation. furthermore, three representative states for data transmission are demonstrated under three fluences, from still working to the critical state and eventually complete fail. Displacement damage and ionization damage are the two major mechanisms during proton radiation, which lead to the bulk defects and accumulating defect charges and cause performance degradation of silicon Mach-Zehnder modulators.

关键词： silicon Mach-Zehnder modulator proton radiation space application silicon photonics optical communication

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Two-dimensional materials for future information technology: status and prospects

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Science China(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu fu Jingshu GUO Pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... School of Electronic Science and Engineering Nanjing University School of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University School of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences School of Physics and Key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou Laboratory State Key Laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin Laboratory Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronicdevices optoelectronic devices multi-functional integration

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Trend judgment of abandoned channels and fine architecture characterization in meandering river reservoirs: A case study of Neogene Minhuazhen Formation NmⅢ2 layer in Shijiutuo bulge, Chengning uplift, Bohai Bay Basin, East China

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Petroleum Exploration and Development 2019年第5期46卷 943-953页

作者： NIU Bo ZHAO Jiahong fu Ping LI Junjian BAO Zhidong HU Yong SU Jinchang GAO xingjun ZHANG Chi YU Dengfei ZANG Dongsheng LI Min College of Geosciences China University of PetroleumBeijing 102249China Research Institute of Exploration and Development PetroChina Jilin Oilfield CompanySongyuan 138001China No.5 Oil Production Plant PetroChina Changqing Oilfield CompanyXi’an 710020China Bohai Oilfield Research Institute CNOOC Tianjin CompanyTianjin 300452China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China

Based on well logging responses,sedimentary patterns and sandstone thickness,the distribution characteristics of meandering river sedimentary sand body of Neogene Minghuazhen Formation NmⅢ2 layer in the west of Shijiutuo Bulge,Chengning Uplift,Bohai Bay Basin were investigated.A new approach to calculate the occurrence of the sand-mudstone interfaces using resistivity log of horizontal well was advanced to solve the multiple solution problem of abandoned channel’s *** method uses the trigonometric function relationship between radius,dip and length of the resistivity log to calculate the occurrence qualitatively-quantitatively to help determine the true direction of the abandoned *** method can supplement and improve the architecture dissection technique for meandering river *** method was used to study the dip angle and scale of the lateral accretion layers in point bar quantitatively to help determine the spatial distribution of lateral accretion *** fine architecture model of underground meandering river reservoir in the study area has been *** from traditional grids,different grid densities for lateral accretion layers and bodies were used in this model by non-uniform upscaling to establish the inner architecture model of point-bars and realize industrial numerical simulation of the whole study *** research results can help us predict the distribution of remaining oil,tap remaining oil,and optimize the waterflooding in oilfields.

关键词： Bohai Bay Basin meandering river horizontal well resistivity curve lateral accretion layers lateral accretion bodies architecture modeling remaining oil distribution

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车轮辐板开孔对汽车外流场影响的数值模拟

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农业机械学报 2006年第1期37卷 8-11页

作者：傅立敏胡兴军张世村吉林大学汽车工程学院

针对同一简化车身模型与车轮,应用计算流体动力学(CFD)在STAR-CD软件平台下对6种具有不同辐板的车轮及其整车的外流场进行了数值模拟,探讨辐板上开孔面积和布置方式对车轮及其整车空气动力特性的影响。通过对轮腔内以及车身底部的压力... 详细信息

针对同一简化车身模型与车轮,应用计算流体动力学(CFD)在STAR-CD软件平台下对6种具有不同辐板的车轮及其整车的外流场进行了数值模拟,探讨辐板上开孔面积和布置方式对车轮及其整车空气动力特性的影响。通过对轮腔内以及车身底部的压力等值线和涡量等流场特性的分析,得出随着辐板上开孔个数和面积的增加车轮的气动阻力和汽车总气动阻力系数的变化规律。

关键词：车轮结构空气动力学数值模拟

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Allotransplantation of adult spinal cord tissues after complete transected spinal cord injury: long-term survival and functional recovery in canines

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Science China(Life Sciences) 2020年第12期63卷 1879-1886页

作者： He Shen Shuyu Wu Xi Chen Bai Xu Dezun Ma Yannan Zhao Yan Zhuang Bing Chen Xianglin Hou Jiayin Li Yudong Cao Xianyong fu Jun Tan Wen Yin Juan Li Li Meng Ya Shi Zhifeng Xiao xingjun Jiang Jianwu Dai Key Laboratory for Nano-Bio Interface Research Division of NanobiomedicineSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Department of Neurosurgery Xiangya HospitalCentral South UniversityChangsha 410008China Shigatse Branch Xinqiao HospitalArmy Medical University(Third Military Medical University)Shigatse 857000China Department of Radiology Xiangyfa HospitalCentral South UniversityChangsha 410008China

Spinal cord injury(SCI), especially complete transected SCI, leads to loss of cells and extracellular matrix and functional impairments. In a previous study, we transplanted adult spinal cord tissues(aSCTs) to replace lost tissues and facilitate recovery in a rat SCI model. However, rodents display considerable differences from human patients in the scale, anatomy and functions of spinal cord systems, and responses after injury. Thus, use of a large animal SCI model is required to examine the repair efficiency of potential therapeutic approaches. In this study, we transplanted allogenic aSCTs from adult dogs to the lesion area of canines after complete transection of the thoracic spinal cord, and investigated the long-term cell survival and functional recovery. To enhance repair efficiency, a growth factor cocktail was added during aSCT transplantation, providing a favorable microenvironment. The results showed that transplantation of a SCTs, in particular with the addition of growth factors, significantly improves locomotor function restoration and increases the number of neurofilament-, microtubule-associated protein2-, 5-hydroxytryptamine-, choline acetyltransferase-and tyrosine hydroxylase-positive neurons in the lesion area at 6 months post-surgery. In addition, we demonstrated that donor neurons in a SCTs can survive for a long period after transplantation. This study showed for the first time that transplanting aSCTs combined with growth factor supplementation facilitates reconstruction of injured spinal cords, and consequently promotes long lasting motor function recovery in a large animal complete transected SCI model, and therefore could be considered as a possible therapeutic strategy in humans.

关键词： complete spinal cord injury allotransplantation adult spinal cord tissues(aSCTs) adult mammalian long-term survival functional restoration

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移动图书馆场景化信息接受思维及其应用研究

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国家图书馆学刊 2019年第3期28卷 45-53页

作者：王福刘兴军内蒙古工业大学经济管理学院呼伦贝尔市图书馆

移动图书馆服务逐渐完成了从“流量为王”向“数据为王”的转变,目前正从“数据为王”向“场景为王”转变。场景已成为移动图书馆信息接受的重要方式,如何将场景思维落实为移动图书馆的实际应用是目前需要解决的问题。为此,本文总结和... 详细信息

移动图书馆服务逐渐完成了从“流量为王”向“数据为王”的转变,目前正从“数据为王”向“场景为王”转变。场景已成为移动图书馆信息接受的重要方式,如何将场景思维落实为移动图书馆的实际应用是目前需要解决的问题。为此,本文总结和归纳了移动图书馆场景化信息接受的“五化”属性特征,指出移动图书馆场景化信息接受思维的实质是利用大数据挖掘用户特定时空的信息接受行为,通过场景化信息接受情境的配置将场景思维落实到实际应用。移动图书馆场景化功能的快速迭代使不同场景下的信息接受情境配置和融合效用成为场景化思维落地的有效途径,其可以促进移动图书馆场景化信息接受核心功能的优化,进而实现图书馆品牌化服务、提升服务黏性。

关键词：移动图书馆信息接受场景化思维场景化应用

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侧风对轿车气动特性影响的稳态和动态数值模拟对比研究

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汽车工程 2010年第6期32卷 477-481页

作者：王夫亮胡兴军杨博傅立敏吉林大学汽车工程学院长春130022

分别采用稳态方法和基于动网格技术的动态方法对侧风作用下的汽车外流场进行了3种情况的数值模拟,将3种模拟结果进行对比,同时将部分模拟结果与试验值进行了对比。结果表明合理选用数值模拟方案可获得较满意的计算结果;地面边界层对计... 详细信息

分别采用稳态方法和基于动网格技术的动态方法对侧风作用下的汽车外流场进行了3种情况的数值模拟,将3种模拟结果进行对比,同时将部分模拟结果与试验值进行了对比。结果表明合理选用数值模拟方案可获得较满意的计算结果;地面边界层对计算结果影响较大;稳态方法和动态方法的流场分布、阻力系数和升力系数以及较弱侧风条件下的侧向力系数有较好的一致性,强侧风条件下的侧向力系数则差别较大。

关键词：汽车空气动力学侧风稳态数值模拟动态数值模拟地面边界层效应

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具有不同辐板车轮的空气动力学特性研究

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同济大学学报（自然科学版） 2006年第12期34卷 1684-1688页

作者：胡兴军傅立敏张世村张英朝吉林大学汽车工程学院吉林长春130022

应用计算流体力学的方法,对具有不同辐板的车轮外流场进行了数值模拟,并与试验相对照,讨论不同的车轮辐板所引起的气动特性的变化.根据车轮上辐板的不同,对于同一型号的8种车轮模型分成3组进行研究.通过对比分析不同车轮的表面压力系数... 详细信息

应用计算流体力学的方法,对具有不同辐板的车轮外流场进行了数值模拟,并与试验相对照,讨论不同的车轮辐板所引起的气动特性的变化.根据车轮上辐板的不同,对于同一型号的8种车轮模型分成3组进行研究.通过对比分析不同车轮的表面压力系数以及车轮周围的涡流等流场特性,可以得知:车轮辐板的改变不仅影响车轮的局部流场,还会影响整车的气动特性.模拟结果表明,车轮阻力系数改变是由其周围流场中涡流特征的变化所致.

关键词：汽车空气动力学漩涡数值模拟车轮辐板

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