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Silicon-based decoder for polarization-encoding quantum key distribution

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Chip 2023年第1期2卷 45-50页

作者： Yongqiang Du Xun Zhu xin Hua Zhengeng zhao xiao Hu Yi Qian xi xiao Kejin Wei Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Sci-ence and TechnologyGuangxi UniversityNanning 530004China National In-formation Optoelectronics Innovation Center(NOEIC) Wuhan 430074China State Key Laboratory of Optical Communication Technologies and Networks China Information and Communication Technologies Group Corporation(CICT)Wuhan 430074China

Silicon-based polarization-encoding quantum key distribution(QKD)has been extensively studied due to its advantageous characteris-tics of its low cost and ***,given the difficulty of fabricating polarized independent components on the chip,previ-ous studies have only adopted off-chip devices to demodulate the quantum states or perform polarization *** the cur-rent work,a fully chip-based decoder for polarization-encoding QKD was *** chip realized a polarization state analyzer and compensated for the BB84 protocol without the requirement of additional hardware,which was based on a polarization-to-path conversion method utilizing a polarization *** chip was fabricated adopting a standard silicon photonics foundry,which was of a compact design and suitable for mass *** the experimental stability test,an average quantum bit error rate of 0.59%was achieved through continuous operation for 10 h with-out any polarization ***,the chip enabled the automatic compensation of the fiber polarization drift when utiliz-ing the developed feedback algorithm,which was emulated by a ran-dom fiber polarization ***,a finite-key secret rate of 240 bps over a fiber spool of 100 km was achieved in the case of the QKD *** study marks an important step to-ward the integrated,practical,and large-scale deployment of QKD systems.

关键词： Quantum key distribution Silicon photonics Chip Polarization-encoding Polarization compensation

Progress in understanding hormonal regulation during the postembryonic development of Helicoverpa armigera

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Journal of Integrative Agriculture 2020年第6期19卷 1417-1428页

作者： zhao xiao-fan Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology School of Life SciencesShandong UniversityQingdao 266237P.R.China

Lepidoptera,with 0.16 million species,is the second largest order of *** order includes silk worms,butterflies,and many agricultural *** cotton bollworm,Helicoverpa armigera(Hubner)is one of the pests in Lepidoptera that seriously harms cotton plant and other crops in China and other *** pest develops resistance to chemical insecticides *** thuringiensis(Bt)transgenic cotton plants are developed to control *** population in the ***,duri ng the past years,the rapid evoluti on of Bt toxi n resista nee is observed in *** in tran sge nic cott on *** approaches for the development of new envir on mentally friendly insecticides to control *** have become necessary,and the molecular mechanisms underlying the development and physiological processes of this species need to be further *** progress in the study of *** development and physiology has been achieved in the last *** mini-review summarizes the main fin dings on the molecular mechanisms of horm onal regulation of the development of *** to present new target genes for developing new approaches to control the pest.

关键词： Helicoverpa armigera Lepidoptera hormonal regulation development pest control

Learning curves of resection and reconstruction procedures in robotic-assisted pancreatoduodenectomy by a single surgeon:a retrospective cohort study of 160 consecutive cases

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Gastroenterology Report 2023年第1期11卷 424-432页

作者： xi-Tai Huang xi-Yu Wang Jin-zhao xie Jian-Peng Cai Wei Chen Liu-Hua Chen xiao-Yu Yin Department of Pancreato-Biliary Surgery The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China

Background:Robotic-assisted pancreatoduodenectomy(RPD)has been routinely performed in a few of centers *** study aimed to evaluate the perioperative outcomes and the learning curves of resection and reconstruction procedures in RPD by one single ***:Consecutive patients undergoing RPD by a single surgeon at the First Affiliated Hospital of Sun Yat-sen University(Guangzhou,China)between July 2016 and October 2022 were *** perioperative outcomes and learning curves were retrospectively analysed by using cumulative sum(CUSUM)***:One-hundred and sixty patients were *** to the CUSUM curve,the times of resection and reconstruction procedures were shortened significantly after 30 cases(median,284 vs 195 min;P<0.001)and 45 cases(median,138 vs 120 min;P<0.001),*** estimated intraoperative blood loss(median,100 vs 50 mL;P<0.001)and the incidence of clinically relevant post-operative pancreatic fistula(29.2%vs 12.5%;P=0.035)decreased significantly after 20 and 120 cases,*** were no significant differences in the total number of lymph nodes examined,post-operative major complications,or post-operative length-of-stay between the two ***:Optimization of the resection procedure and the acquisition of visual feedback facilitated the performance of *** was a safe and feasible procedure in the selected patients.

关键词： robotic-assisted surgery pancreatoduodenectomy learning curve outcomes

A Multiplicity Result of Positive Solutions for a Class of Multi-parameter Ordinary Differential Systems

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Acta Mathematicae Applicatae Sinica 2012年第4期28卷 653-662页

作者： xi-you CHENG xiao-lin YAN School of Mathematics and Statistics Lanzhou University School of Science Tianjin Polytechnic University

In this paper, we establish a result of Leray-Schauder degree on the order interval which is induced by a pair of strict lower and upper solutions for a system of second-order ordinary differential equations. As applications, we prove the global existence of positive solutions for a multi-parameter system of second-order ordinary differential equations with respect to parameters. The discussion is based on the result of Leray- Schauder degree on the order interval and the fixed point index theory in cones.

关键词： positive solution ordinary differential system fixed point index

Novel Crystallization Behaviors of Zr-Based Metallic Glass Under Thermo-Mechanical Coupled Fatigue Loading Condition

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Acta Metallurgica Sinica(English Letters) 2019年第7期32卷 797-802页

作者： Zhi-Chao Ma xiao-xi Ma Hong-Wei zhao Fu Zhang Li-Ming Zhou Lu-Quan Ren School of Mechanical and Aerospace Engineering Jilin University Changchun 130025 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130025. China

Novel crystallization behaviors of Zr55Cu30Al10Ni5 bulk metallic glass are investigated. On the one hand, mixed oxides, including CuO, CuAlO2, CuA12O4 and ZrO2, show sequential oxidation process determined by coupling effects of specific cyclic load and temperature. On the other hand, at a temperature (100℃) by far lower than Tg of 412 ℃, under cyclic loading condition, non-oxidized binary alloy CuZr2 is precipitated;the thermo-mechanical coupled effects of temperature below Tg, and fatigue accumulation on the non-oxidized crystallization behaviors are revealed. Meanwhile, at a constant temperature of 400 ℃, by comparing among the XRD patterns, respectively, obtained from tensile, creep and fatigue fractures, the dominating effect of cyclic load on the generation of non-oxidized CuZr2 is verified. Furthermore, the crystallization behavior of amorphous phases under cyclic loading condition is observed through TEM micrograph and diffraction pattern at 100℃.

关键词： Bulk metallic glass Fatigue Thermo-mechanical coupling Crystallization

Structure and Quantum Chemistry Study on Hexaacetyl D-Mannose Hydrazine

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Chinese Journal of Structural Chemistry 2007年第8期26卷 911-916页

作者： CAO Rui LIU xiao-Hong CHENG Chang-Mei WANG Ru-Ji zhao Yu-Fen WANG Lai-xi Key Laboratory of Bioorganic Phosphorus Chemistry ＆ Chemical Biology （Ministry of Education） Department of Chemistry Tsinghua University Beijing 100084 China Institute of Human Virology University of Maryland Biotechnology Institute University of Maryland USA

Hexaacetyl D-mannose hydrazine is one type of important intermediates in saccharide chemistry. In this paper, its single crystal was obtained and furthermore, X-ray diffraction and quantum chemistry calculation were performed. It belongs to orthorhombic system, space group P212121, with a=16.267（3）, b=19.263（3）, c=7.1948（12）A, Mr=446.41, Dc=1.315 g/cm^3, V=2254.5（6）A^3 and Z=4. Meanwhile, the experimental results also provide information for designing a kind of molecular switch based on the mannose nitrogenous derivatives.

关键词： hexaaeetyl D-mannose hydrazine crystal structure calculation of quantum chemistry molecular switch

Transforming liquid flow fuel cells to controllable reactors for highlyefficient oxidation of 5-hydroxymethylfurfural to 2, 5-furandicarboxylic acid at low temperature

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Journal of Energy Chemistry 2024年第3期90卷 621-631,I0014页

作者： Ye Qiang xi Liu Denghao Ouyang zhao Jiang Xuebing zhao Key Laboratory of Industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing 100084China Institute of Applied Chemistry Department of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina

Highly-efficient oxidation of 5-hydroxymethylfurtural(HMF) to 2,5-furandicarboxylic acid(FDCA) at low temperature with air as the oxidant is still ***,inspired by the respirato ry electron transport chain(ETC) of living cells mediated by electron carriers,we constructed artificial ETCs and transformed liquid flow fuel cells(LFFCs) to flexible reactors for efficient oxidation of HMF to produce FDCA under mild *** LFFC reactor employed an electrodeposition modified nickel foam as an anode to promote HMF oxidation and(VO_(2))_(2)SO_(4) as a cathode electron carrier to facilitate the electron transfer to *** reaction rate could be easily controlled by selecting the anode catalyst,adjusting the external loading and changing the cathodic electron carrier or oxidants.A maximal power density of 44.9 mW cm^(-2) at room temperature was achieved,while for FDCA production,short-circuit condition was preferred to achieve quick transfer of *** a single batch operation with 0.1 M initial HMF,FDCA yield reached 97.1%.By fed-batch operation,FDCA concentration reached 144.5 g L^(-1) with a total yield of 96%.Ni^(2+)/Ni^(3+) redox couple was the active species mediating the electron transfer,while both experimental and DFT calculation results indicated that HMFCA pathway was the preferred reaction mechanism.

关键词： 5-Hydroxymethylfurfural 2 5-Furandicarboxylic acid Electrodeposition Electron transport chain Liquid flow fuel cell

High-fidelity simulation of blade vortex interaction of helicopter rotor based upon TENO scheme

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Chinese Journal of Aeronautics 2023年第10期36卷 275-292页

作者： Wei BIAN Guoqing zhao xi CHEN Bo WANG Qijun zhao National Key Laboratory of Rotorcraft Aeromechanics College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

Numerical simulation methods for unsteady vortex field of helicopter rotor with high resolution and low dissipation TENO8-AA primitive variables reconstruction schemes are established based on moving-embedded grid and Navier-Stokes ***,the Targeted Essentially Non-Oscillatory(TENO)scheme are developed by employing ENO-like candidate stencil selection strategy,and the candidate stencil is adopted with optimal weight in smooth region while it is discarded completely in discontinuous region,which reduces the dissipation and dispersion errors and approaches better spectral ***,the aerodynamic characteristics of Helishape-7A model rotor in Blade Vortex Interaction(BVI)state and the flowfield of Lynx rotor in hover are simulated,which validates that the blade tip vortex trajectory with larger wake age and more details of vortex can be captured by TENO8-AA scheme with only a quarter of grid points and half time comparing to WENO-JS ***,the simulation accuracy of thrust coefficient is improved by up to 36%.Finally,the analyses for BVI and aeroacoustic characteristics of Operational Loads Survey(OLS)rotor are conducted,and the different forms of interaction mechanism are explored,such as oblique and parallel *** results indicate that TENO scheme not only ensures the resolution of simulation in discontinuous region,but also minimizes the numerical dissipation in smooth region dominated by blade tip ***,the acoustic pressure peak prediction error of rotor in BVI state is significantly reduced to 5.6%and 0.8%at two microphone locations,respectively.

关键词： Aeroacoustics Blade tip vortex Blade vortex interaction Helicopter rotor TENO scheme

To increase more than 10% in efficiency of perovskite solar cells by using nanoholes SnO_(2)

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Rare Metals 2021年第10期40卷 2778-2784页

作者： Shu-Ren Sun xi-xi xie Guo-Gang Qin Li-xin xiao State Key Laboratory for Mesoscopic Physics and Department of Physics Peking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

The perovskite solar cells have been intensively investigated these years due to their premium electrical and optical properties as well as huge potential for *** order to further increase the power conversion efficiency(PCE) of the thin film perovskite solar cells, light management should be taken into consideration. Herein, we apply a lithography method to transfer randomly distributed polystyrene(PS) nanospheres into the electron transporting SnO_(2) layer, by means of which, a nanoholes structure is formed. Finally, we get a nanostructured perovskite layer under low temperature(less than 150 ℃).The depth of SnO_(2) nanoholes is around 60 nm when the device is fabricated with 300-nm PS, and 150 nm in depth when 500-nm PS is used. The device gains PCE of 17.97%,which is 12.3% higher than that with planar electrontransporting SnO_(2) layer and 300-nm CH_(3)NH_(3)PbI_(3) *** findings provide an applicable method to improve the light absorption, which can not only make the absorbing layer of lead-based perovskite solar cells thinner to help decrease the content of lead, but also increase the PCE of non-lead perovskite devices.

关键词： Light trap Perovskite Solar cell Nanohole Nanosphere lithography