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GHz photon-number resolving detection with high detection efficiency and low noise by ultra-narrowband interference circuits

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Journal of Semiconductors 2024年第3期45卷 71-75页

作者： Tingting Shi yuanbin Fan Zhengyu Yan Lai Zhou Yang Ji zhiliang yuan Beijing Academy of Quantum Information Sciences Beijing 100193China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China

We demonstrate the photon-number resolution(PNR)capability of a 1.25 GHz gated InGaAs single-photon avalanche photodiode(APD)that is equipped with a simple,low-distortion ultra-narrowband interference circuit for the rejection of its background capacitive *** discriminating the avalanche current amplitude,we are able to resolve up to four detected photons in a single detection gate with a detection efficiency as high as 45%.The PNR capability is limited by the avalanche current saturation,and can be increased to five photons at a lower detection efficiency of 34%.The PNR capability,combined with high efficiency and low noise,will find applications in quantum information processing technique based on photonic qubits.

关键词： single photon avalanche diode(APD) photon number resolution(PNR) detection efficiency

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Quantifying backflash radiation to prevent zero-error attacks in quantum key distribution

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Light(Science & Applications) 2016年第1期5卷 28-32页

作者： Alice Meda Ivo Pietro Degiovanni Alberto Tosi zhiliang yuan Giorgio Brida Marco Genovese INRIM 10135 TorinoItaly Dipartimento di Elettronica Informazione e BioingegneriaPolitecnico di Milano20133 MilanoItaly Toshiba Research Europe Ltd Cambridge CB40GZUK

Single-photon avalanche diodes(SPADs)are the most widespread commercial solution for single-photon counting in quantum key distribution ***,the secondary photon emission that arises from the avalanche of charge carriers that occurs during the detection of a photon may be exploited by an eavesdropper to gain information without inducing errors in the transmission *** this paper,we characterize such backflash light in gated InGaAs/InP SPADs and discuss its spectral and temporal characterization for different detector models and different operating *** qualitatively bound the maximum information leakage due to backflash light and propose solutions for preventing such leakage.

关键词： backflash quantum key distribution single-photon avalanche diode zero-error attack

Photoluminescence Studies of Single Submonolayer InAs Structures Grown on GaAs (001) Matrix

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Chinese Physics Letters 1995年第11期12卷 697-700页

作者： LI Wei WANG Zhanguo LIANG Jiben XU Bo ZHU Zhanping yuan zhiliang LI Jian Laboratory of Semiconductor Materials Science Institute of SemiconductorsAcademia SinicaBeijing 100083 National Semiconductor Superlattice Laboratory Institute of SemiconductorsAcademia SinicaBeijing 100083 National Integrated Optoelectronics Laboratory Institute of SemiconductorsAcademia SinicaBeijing 100083

We report a detailed analysis of optical properties of single submonolayer InAs structures grown on GaAs(001)*** is shown that the formation of InAs dots with 1 monolayer(ML)height leads to localization of exciton under certain submonolayer InAs coverage,which play a key role in the highly improved luminescence efficiency of the submonolayer InAs/GaAs structures.

关键词： InAs/GaAs InAs monolayer

Torus-translations test detects unexpected associations between epiphytic bryophyte and woody plant species in a temperate deciduous broad-leaved forest

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Torus-translations test detects unexpected associations betw...

Effects of topography, light, plant community, and space on macrofungi community structure in a temperate mountain forest in China

中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Yun Chen Yongchun Hu Shuai Bi zhiliang yuan Yongzhong Ye College of Life Sciences Henan Agricultural University

Woody plant is one of important substrates for bryophyte growth,whether epiphytic bryophyte have ecological preferences for woody plants? Here,our primary interest in developing torus-translations test is to evaluate the associations between epiphytic bryophyte and woody plant *** study was performed in a 100 m × 100 m forest dynamics plot in temperate mountain forest（China）.A total of 3318 woody plant belonging to 75 species（diameter at breast height ≥ 1 cm） were identified in the *** recorded 988 epiphytic bryophyte specimens belonging to 61 species in 254 woody plants ***-translations test showed that 93.44%（57/61）,93.44%（57/61）,and 98.36%（60/61） bryophyte species were significant positive associated with the family,genus,and species of woody plants,respectively.A total of 317,563,and 857 significant positive associations with the family,genus,and species of woody plants were observed among 61 examined bryophyte *** addition,fewer significant negative associations were identified with the family,genus,and species of woody *** study demonstrates that most epiphytic bryophytes exhibited ecological habitat preferences for woody plants *** observations highlight the importance of species composition of woody plant in the maintenance of epiphytic bryophyte diversity in temperate deciduous broad-leaved forest.

关键词： ecological preference forest dynamics plot species diversity temperate deciduous broad-leaved forest

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Effects of topography, light, plant community, and space on ...

OPTIMIZATION METHODS OF THE PRODUCT ASSEMBLY LINE SYSTEM

中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Xueying Wang Nan Wang Yongchun Hu Yun Chen zhiliang yuan Yongzhong Ye College of Life Sciences Henan Agricultural University

The effects of environmental and dispersal processes on macrofungi community assembly remain ***,it is not well understood if community assembly differs for different functional guilds of macrofungi,e.g.,soil and rotten-wood *** this study,using 2433 macrofungi sporocarps belonging to 217 species located within a forest dynamics plot in temperate mountain forest（China）,we examined the explanatory power of topography,spatial eigenvectors,plant community,and light availability for local spatial variation in the macrofungi community through variance partitioning and partial least squares path *** found spatial eigenvectors and light as the most important factors for explaining species richness and composition of *** was negatively correlated with species richness of ***,species richness and composition of soil macrofungi were best explained by light,and species richness and composition of rotten-wood macrofungi were best explained by spatial *** plant community structure was not an important factor for species richness and composition of *** findings suggest that spatial processes,perhaps dispersal limitation,and light availability were the most important factors affecting macrofungi community in temperate deciduous broad-leaved *** differences in influencing factors between soil and rotten-wood macrofungi were observed,with light as the major driver for soil macrofungi and unknown spatial processes as the major driver for rotten-wood *** findings shed new light to the processes shaping community assembly in macrofungi in temperate deciduous broad-leaved forest and point to the potential importance of both intrinsic dynamics,such as dispersal,and external forcing,such as forest dynamics,via its effect on light availability.

关键词： forest dynamics plot plant–macrofungi relationship species protection

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OPTIMIZATION METHODS OF THE PRODUCT ASSEMBLY LINE SYSTEM

武术飞脚启发作用在采摘机器人智能化设计中的应用

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： LI Guiqin, YAO zhiliang, yuan Qingfeng, FANG Minglun Center of CIMS and Robotics, Shanghai University, Shanghai 200072 China

The assembly line can be regarded as a system consisted of complex disperse events considering the assembly process exists not only time sequence relations but also parallel and competitive relation.

关键词： Discrete event petri net product assembly line Heuristic scheduling arithmetic.

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农机化研究 2022年第2期44卷 249-252页

作者：袁志良古越江西警察学院南昌330100

为了提高采摘机器人的智能化水平,基于武术飞脚动作的连续性,参考飞脚动作的前馈特征,在智能化控制系统的设计上引入了神经网络前馈算法和PID控制算法。通过对误差的修正和期望与实际输出结果的反馈,提升了机器人的智能化水平和采摘作... 详细信息

为了提高采摘机器人的智能化水平,基于武术飞脚动作的连续性,参考飞脚动作的前馈特征,在智能化控制系统的设计上引入了神经网络前馈算法和PID控制算法。通过对误差的修正和期望与实际输出结果的反馈,提升了机器人的智能化水平和采摘作业动作的精确性,实现了采摘机器人的类人化设计。为了验证该方法的可行性,模仿生菜采摘机器人的作业环境对机器人的性能进行了仿真,结果表明:采用神经网络PID算法可以提高机器人控制系统的精确性,并可加快收敛速度,对提升机器人的智能化水平具有重要的意义。

关键词：采摘机器人智能化设计神经网络算法 PID控制器误差反馈武术飞脚

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河南天目山森林种子植物区系研究

林业资源管理 2007年第4期 38-42+48页

作者：董东平叶永忠袁志良许昌学院城市与环境学院河南农业大学生命科学学院

经调查,河南天目山有森林种子植物1 824种,隶属于155科,707属。种子植物区系有如下特点:种类组成丰富,优势现象明显;植物区系复杂多样,以温带分布为主,热带成分较为丰富,南北过渡特征明显;在属的层次上,与各大陆的温带、热带保持着较为... 详细信息

经调查,河南天目山有森林种子植物1 824种,隶属于155科,707属。种子植物区系有如下特点:种类组成丰富,优势现象明显;植物区系复杂多样,以温带分布为主,热带成分较为丰富,南北过渡特征明显;在属的层次上,与各大陆的温带、热带保持着较为广泛的联系;在种的水平上,通过华东与东亚植物区系联系密切;天目山植物区系起源古老,有单种属植物40种,中国特有属25个,国家珍稀濒危保护植物20种,均为第三纪植物区系成分。

关键词：种子植物植物区系相似性系数河南天目山

井间地震层析成像技术在煤层气压裂监测的应用

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中国煤田地质 2007年第2期19卷 70-71,74页

作者：袁志亮孟小红中国地质大学

大1-5井和大1-1井是沧县境内的两口煤层气井,为提高产能,增大气体解吸速率,对其进行了压裂施工。为测定压裂效果,使用DST-3井中声波探测系,对大1-1与大1-5两口煤层气井在压裂前后分别进行了地震层析成像测试,层析成像结果显示,压裂后煤... 详细信息

大1-5井和大1-1井是沧县境内的两口煤层气井,为提高产能,增大气体解吸速率,对其进行了压裂施工。为测定压裂效果,使用DST-3井中声波探测系,对大1-1与大1-5两口煤层气井在压裂前后分别进行了地震层析成像测试,层析成像结果显示,压裂后煤层波速有明显下降,且在横向上变化均匀,表示压裂液扩散带基本连通,裂缝发育,压裂效果明显。为了验证层析成像的结果,将煤层气井的测井解释结果与层析成像结果做了对比,结果较吻合。

关键词：井间地震声波探测层析成象煤层气压裂

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