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TDC-GPX-based synchronization scheme for QKD system

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Nuclear Science and Techniques 2016年第1期27卷 88-92页

作者： Lian-Jun Jiang Shi-biao tang Ze-Jie Yin State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China

To meet the needs of signal alignment between the transmitter and receiver in a quantum key distribution(QKD) system, we put forward a TDC-GPX-based synchronization scheme, which is based on high-precision time measurement. We send a low-frequency repeat optical pulse synchronized with associated quantum signals on the receiver's side by using a time-to-digital converter(TDC)module, the time intervals between quantum signals, and synchronization signals measured and converted to corresponding temporal orders to complete the *** state the principle of the synchronization scheme in detail and then verify it in an actual QKD test bed. The test results show that our TDC-GPX-based synchronization can obtain a time resolution better than 100 ps, and the proposed scheme shows full feasibility for an actual QKD system.

关键词： TDC QKD GPX 同步系统量子密钥分配时间数字转换器信号调整

Laser-induced jigsaw-like graphene structure inspired by Oxalis corniculata ***

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Bio-Design and Manufacturing 2022年第4期5卷 700-713页

作者： Wentao Wang Longsheng Lu Xiaoyu Lu Zhanbo Liang biao tang Yingxi Xie School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Normal UniversityGuangzhou 510006China

The laser scribing of polyimide(PI, Kapton) film is a new, simple and effective method for graphene preparation. Moreover,the superhydrophobic surface modification can undoubtedly widen the application fields of graphene. Herein, inspired by the hydrophobic and self-cleaning properties of natural Oxalis corniculata Linn. leaves, we propose a novel bionic manufacturing method for superhydrophobic laser-induced graphene(LIG). By tailoring the geometric parameters(size, roughness and height/area ratio) and chemical composition, the three-dimensional(3D) multistage LIG, i.e., with micro-jigsaw-like and porous structure, can deliver a static water contact angle(WCA) of 153.5° ± 0.6°, a water sliding angle(WSA) of 2.5° ±0.5°, and great superhydrophobic stability lasting for 100 days(WCAs ≈ 150°). This outstanding water repellency is achieved by the secondary structure of jigsaw-like LIG, a porous morphology that traps air layers at the solid–liquid interface. The robust self-cleaning and anti-stick functions of 3D bionic and multistage LIG are demonstrated to confirm its great potential in wearable electronics.

关键词： Laser-induced graphene Oxalis corniculata Linn Bionic Multistage structure Superhydrophobic surface

Dynamic characteristics of the pipeline inspection gauge under girth weld excitation in submarine pipeline

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Petroleum Science 2022年第2期19卷 774-788页

作者： Hang Zhang Meng-Qi Gao biao tang Can Cui Xue-Feng Xu College of Mechanical and Storage and Transportation Engineering China University of Petroleum-BeijingBeijing102249China CNPC offshore Engineering Co.Ltd Beijing102200China

Pipeline inner inspection technology based on Pipeline Inspection Gauge(PIG),is the primary means for ensuring the safety of submarine *** dynamic characteristics of a PIG can change abruptly with the excitation of obstacles such as girth welds inside the pipeline,which would result in failure or inaccuracy of the inspection *** study establishes a dynamic model of the PIG sealing disc based on Kelvin spring damping in the circumferentially confined *** axial vibration differential equations of the PIG is examined in ***/ADAMS is used to conduct the dynamic simulation of the PIG at different motion velocities and center of mass positions while passing through the girth weld *** indicate that the axial vibration caused by the girth weld intensifies substantially as the speed of the PIG increases,while the pitch and vertical vibrations exhibit a significant decline with an increase in the motion *** change in the PIG’s center of mass positions has little effect on its axial vibration,while the pitch and vertical vibration conditions are significantly different in the same circumstances.

关键词： Pipeline inspection gauge Multi-system model Dynamic response Shock vibration Girth weld Submarine pipeline

Excitatory effect of histamine on neuronal activity of rat cerebellar fastigial nucleus in vitro

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Chinese Science Bulletin 2007年第4期52卷 497-503页

作者： tang biao ZHANG Jun LI HongZhao ZHU JingNing WANG JianJun Department of Biological Science and Technology/State Key Laboratory of Pharmaceutical Biotechnology School of Life Sciences Nanjing University Nanjing 210093 China Jiangsu Key Laboratory for Bioresource Technology School of Life Sciences Nanjing Normal University Nanjing 210097 China

The cerebellar fastigial nucleus (FN) holds an important role in motor control and body balance. Previous studies have revealed that the nucleus is innervated by direct hypothalamocerebellar histaminergic fibers. However, the functional role of histaminergic projection in cerebellar FN has never been established. In this study, we investigated the effect of histamine on neuronal firing of cerebellar FN by using slice preparations. Sixty-five FN cells were recorded from 47 cerebellar slices, and a vast majority of the cells responded to histamine stimulation with an excitatory response (58/65, 89.2%). Perfusing slices with low-Ca2+/high-Mg2+ medium did not block the histamine-induced excitation (n=10), supporting a direct postsynaptic action of histamine on the cells. Furthermore, the excitatory effect of histamine on FN neurons was not blocked by selective histamine H1 receptor antagonist triprolidine (n=15) or chlorpheniramine (n=10), but was effectively suppressed by ranitidine (n=15), a highly selective histamine H2 receptor antagonist. On the other hand, highly selective histamine H2 receptor agonist dimaprit (n=20) instead of histamine H1 receptor agonist 2-pyridylethylamine (n=16) mimicked the ex- citatory effect of histamine on FN neurons. The dimaprit-induced FN neuronal excitation was effectively antagonized by selective histamine H2 receptor antagonist ranitidine (n=13) but not influenced by se- lective histamine H1 receptor antagonist triprolidine (n=15). These results demonstrate that histamine excites cerebellar FN cells via the histamine H2 receptor mechanism and suggest that the hypotha- lamocerebellar histaminergic fibers may modulate cerebellar FN-mediated sensorimotor integration through their excitatory innervations on FN neurons.

关键词：大鼠小脑顶核神经活动组胺受体兴奋作用

Sensitivity function analysis of gravitational wave detection with single-laser and large-momentum-transfer atomic sensors

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Research in Astronomy and Astrophysics 2015年第3期15卷 333-347页

作者： biao tang Bao-Cheng Zhang Lin Zhou Jin Wang Ming-Sheng Zhan State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences University of Chinese Academy of Sciences

Recently, a configuration using atomic interferometers （AIs） had been sug- gested for the detection of gravitational waves. A new AI with some additional laser pulses for implementing large momentum transfer was also put forward, in order to reduce the effect of shot noise and laser frequency noise. We use a sensitivity function to analyze all possible configurations of the new AI and to distinguish how many mo- menta are transferred in a specific configuration. By analyzing the new configuration, we further explore a detection scheme for gravitational waves, in particular, that ame- liorates laser frequency noise. We find that the amelioration occurs in such a scheme, but novelly, in some cases, the frequency noise can be canceled completely by using a proper data processing method.

关键词： gravitational wave detection -- atomic interferometer-- laser frequencynoise

Quantum gravimetry going toward real applications

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The Innovation 2022年第3期3卷 5-6页

作者： Jiaqi Zhong biao tang Xi Chen Lin Zhou State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China

GRAVIMETRY AND ATOM INTERFEROMETERS Gravimetry techniques play significant roles in the fields of metrology,geology,and industrial-related applications such as resource exploration and *** absolute gravimeters and absolute gravity gradiometers have long been limited by mechanical wear and lower sampling rate,which make them powerless for long-term continuous observations and applications on moving platforms.

关键词： geology absolute observations

Heat Transfer and Its Effect on Solidification in Combined Mould

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Journal of Iron and Steel Research International 2005年第6期12卷 20-22,36页

作者： QIU Sheng-tao TAO Hong-biao tang Hong-wei ZHANG Hui ZHAO Pei Central Iron and Steel Research Institute Beijing 100081 China

The nucleation can be enhanced by decreasing the superheat of molten steel, thus reducing temperature gradient on the solidification front can retard the growth of columnar crystals and enlarge the equiaxed zone in continuous casting strand. The billets with equiaxed zone more than 90% were cast with a combined mould and the heat flux was measured. The heat transfer of the combined mould and traditional mould was compared. The resuits show that under same casting conditions, the temperature gradient on the solidification front in the combined mould is smaller than that in traditional mould at a distance within 0-150 mm from the meniscus.

关键词： combined mould heat transfer temperature gradient equiaxed zone

短定子磁浮列车基于悬浮间隙实现测速和定位的算法仿真及应用

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湖南工业大学学报 2025年第1期39卷 51-56页

作者：汤彪朱跃欧蒋毅乔若辉吴定鼎中车株洲电力机车有限公司磁浮系统研究所湖南株洲412001

短定子磁浮列车测速和定位技术实现方式与传统轮轨不同,目前有多种技术实现方式,但都需要在磁浮列车上设置测速和定位设备或系统,且与悬浮控制系统相互独立,但悬浮控制系统对速度信号和位置信号又有一定的依赖性。因此,设计了一种基于... 详细信息

短定子磁浮列车测速和定位技术实现方式与传统轮轨不同,目前有多种技术实现方式,但都需要在磁浮列车上设置测速和定位设备或系统,且与悬浮控制系统相互独立,但悬浮控制系统对速度信号和位置信号又有一定的依赖性。因此,设计了一种基于悬浮间隙实现测速和定位的算法,并通过仿真达到算法设计预期目的,最后通过编程将算法嵌入磁浮列车的悬浮控制系统硬件平台,实现测速和定位的算法应用,测速和定位信号完全集成于悬浮控制系统中,摆脱悬浮控制系统对外置测速定位系统的依赖,提升磁浮列车在轨道交通市场的竞争力。

关键词：短定子磁浮列车悬浮间隙测速定位算法仿真

Mold-free self-assembled scalable microlens arrays with ultrasmooth surface and record-high resolution

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Light(Science & Applications) 2023年第7期12卷 1318-1326页

作者： Zhihao Liu Guangwei Hu Huapeng Ye Miaoyang Wei Zhenghao Guo Kexu Chen Chen Liu biao tang Guofu Zhou Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China National Center for International Research on Green Optoelectronics South China Normal UniversityGuangzhou 510006China School of Electrical and Electronic Engineering 50 Nanyang AvenueNanyang Technological UniversitySingapore 639798Singapore Shenzhen Guohua Optoelectronics Tech.Co.Ltd Shenzhen 518110China

Microlens arrays(MLAs)based on the selective wetting have opened new avenues for developing compact and miniaturized imaging and display techniques with ultrahigh resolution beyond the traditional bulky and volumetric ***,the selective wetting lenses explored so far have been constrained by the lack of precisely defined pattern for highly controllable wettability contrast,thus limiting the available droplet curvature and numerical aperture,which is a major challenge towards the practical high-performance *** we report a mold-free and self-assembly approach of mass-production of scalable MLAs,which can also have ultrasmooth surface,ultrahigh resolution,and the large tuning range of the *** selective surface modification based on tunable oxygen plasma can facilitate the precise pattern with adjusted chemical contrast,thus creating large-scale microdroplets array with controlled *** numerical aperture of the MLAs can be up to 0.26 and precisely tuned by adjusting the modification intensity or the droplet *** fabricated MLAs have high-quality surface with subnanometer roughness and allow for record-high resolution imaging up to equivalently 10,328 ppi,as we *** study shows a cost-effective roadmap for mass-production of high-performance MLAs,which may find applications in the rapid proliferating integral imaging industry and high-resolution display.

关键词： record pattern precise