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Efficient generation of NOON states on two microwave-photon resonators

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Chinese Science Bulletin 2014年第23期59卷 2829-2834页

作者： ming Hua ming-Jie Tao Fu-guo Deng Applied Optics Beijing Area Major Laboratory Department of PhysicsBeijing Normal University

We present an efficient scheme for the generation of NOON states of photons in circuit QED assisted by a superconducting charge *** is completed with two kinds of manipulations,that is,the resonant operation on the qutrit and the resonator,and the single-qubit operation on the qutrit,and they both are high-fidelity *** with the one by a superconducting transmon qutrit proposed by Su et al.(Sci Rep 4:3898,2014),our scheme does not require to maintain the qutrit in the third excited state with a long time,which relaxes the difficulty of its implementation in ***,the level anharmonicity of a charge qutrit is larger and it is better for us to tune the different transitions of the charge qutrit resonant to the resonator,which makes our scheme faster than others.

关键词：微波光子状态共振器谐振器三激发态 QED 操作 SCI

Projected heat wave increasing trends over China based on combined dynamical and multiple statistical downscaling methods

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Advances in Climate Change Research 2023年第5期14卷 758-767页

作者： ming ZHANG Zhong-Yang guo Guang-Tao DONG Jian-guo TAN Key Laboratory of Geographic Information Science(Ministry of Education) East China Normal UniversityShanghai 200241China School of Geographic Sciences East China Normal UniversityShanghai 200241China Key Laboratory of Spatial-Temporal Big Data Analysis and Application of Natural Resources in Megacities Ministry of Natural Resources of ChinaShanghai 200241China Shanghai Climate Center Shanghai 200030China Key Laboratory of Cities'Mitigation and Adaptation to Climate Change in Shanghai China Meteorological AdministrationShanghai 200030China Shanghai Meteorological IT Support Center Shanghai 200030China China Meteorological Administration Urban Meteorology Key Laboratory Beijing 100089China

Extensive investigations on the projection of heat waves(HWs)were conducted on the basis of coarse-resolution global climate models(GCMs).However,these investigations still fail to characterise the future changes in HWs regionally over *** dynamical downscaling with a horizontal resolution of 25 km×25 km was employed on the basis of GCM-HadCM3 to provide reliable projections on HWs over the Chinese mainland,and six statistical downscaling methods were used for bias correction under RCP4.5 and RCP8.5 *** multi-method ensemble(MME)of the top three dynamical downscaling methods with good performance was used to project future *** showed that PRECIS primarily replicated the detailed spatiotemporal pattern of ***,PRECIS overestimated the HWs in the Northwest and Southeast and expanded the areas of HWs in the Northeast and *** statistical downscaling methods(quantile mapping,CDF-t and quantile delta mapping)demonstrated good performance in improving PRECIS simulation for reproducing *** contrast,parametric-based trend-preserving approaches such as scaled distribution mapping and ISI-MIP are outperformed by the three aforementioned methods in downscaling HWs,particularly in the high latitudes of *** on MME projections,at the end of the 21st century,the national average of the number of HW days each year,the length of the longest HW event in the year and the extreme maximum temperature in HW will increase by 3 times,1 time and 1.3℃,respectively,under the RCP4.5 scenario,whilst that under the RCP8.5 scenario will increase by 8 times,3 times and 3.7℃,respectively,relative to *** Northwest is regionally projected to suffer long and hot HWs,whilst the South and Southeast will experience frequent consecutive ***,HWs projected by the combined dynamical and statistical downscaling method are highly reliable in projecting HWs over China.

关键词： Dynamical downscaling Statistical downscaling Heat waves Climate change

Hierarchical and probabilistic quantum information splitting of an arbitrary two-qubit state via two cluster states

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Chinese Physics B 2018年第11期27卷 382-389页

作者： Wen-ming guo Lei-Ru Qin School of Software Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Based on non-maximally entangled four-particle cluster states, we propose a new hierarchical information splitting protocol to probabilistically realize the quantum state sharing of an arbitrary unknown two-qubit state. In this scheme, the sender transmits the two-qubit secret state to three agents who are divided into two grades with two Bell-state measurements,and broadcasts the measurement results via a classical channel. One agent is in the upper grade and two agents are in the lower grade. The agent in the upper grade only needs to cooperate with one of the other two agents to recover the secret state but both of the agents in the lower grade need help from all of the agents. Every agent who wants to recover the secret state needs to introduce two ancillary qubits and performs a positive operator-valued measurement（POVM） instead of the usual projective measurement. Moreover, due to the symmetry of the cluster state, we extend this protocol to multiparty agents.

关键词： cluster state hierarchical quantum information splitting positive operator-valued measurement (POVM)

Projective Lag Synchronization and Parameter Identification of a New Hyperchaotic System

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International Journal of Automation and computing 2013年第3期10卷 256-259页

作者： Wan-Li guo ming-Zhi Mao School of Mathematics and Physics China University of Geosciences

This work was supported by National Basic Research Program of China （973 program）（No. 2011CB710605）, TianYuan Special Funds of National Natural Science Foundation of China （No. 11226134）, National Natural Scien... 详细信息

关键词： Projective lag synchronization hyperchaotic system parameter identification Lyapunov stability theory LaSalle"s in-variance principle.

Electrochemical Cascade Annulation for the Synthesis of 3-Sulfanylquinoline Derivatives under Mild Conditions

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Chinese Journal of Chemistry 2024年第16期42卷 1833-1838页

作者： Ke Li ming-Zhong guo Zhuo Chen Hao-Ran Li Weisi guo ming Li Lin-Bao Zhang State Key Laboratory Base of Eco-Chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdaoShandong 266042China

An efficient electrochemical approach has been developed for the construction of 3-sulfanylquinoline derivatives by treating phenylethynylbenzoxazinanones with disulfides in an undivided *** protocol provided a convenient route to functionalized quinolines with good functional group ***,it does not require any metal catalysts or additives,furnishing a series of biologicalquinolines inmoderatetogoodyields.

关键词： Electrocatalysis Electrooxidation Annulation 3-Sulfany quinoline C3-thioetherification

Microstructure and tribological behavior of tungsten inert gas welding arc brazing tin-based babbit

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Rare Metals 2020年第2期39卷 193-199页

作者： Fang-ming Zhou Qing-Ya Zhang ming-Xiao Shi Hui Li Jun-Wu guo Jiangsu Province Key Laboratory of Advanced Welding Technology Jiangsu University of Science and TechnologyZhenjiang212003China

The microstructure of the tin-based babbit obtained by the method of tungsten inert gas welding(TIG)arc brazing was studied by optical microscopy(OM)and X-ray diffraction(XRD).Tribological behavior was investigated by high-temperature friction and wear testing machine(HTFWT),laser scanning confocal microscopy(LSCM),scanning electron microscopy(SEM)and energydispersive spectrometer(EDS).It can be found that the higher welding current of the melting tin-based babbit makes it possible to form isomer structure with fine crystals of the cubic SnSb compounds and large star Cu6Sn5 compounds so that a higher hardness can be achieved,and a lower wear rate can be obtained over the entire distance of sliding *** the applied load is 2 N,the contact surface is oxidized due to the accumulation of friction heat and oxide,which plays a role of lubricated ***,the softer Sn-based solid solution forms obvious furrow under abrasive wear,and the harder SbSn and Cu6Sn5 intermetallic compounds shatter and leave a hole under friction.

关键词： Tin-based babbit TIG arc brazing Microstructure Tribological behavior

Differences in major ions as well as hydrogen and oxygen isotopes of sediment pore water and lake water

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Water Science and Engineering 2018年第2期11卷 147-156页

作者： Zhuo Zhang Hua-ming guo Zhen Wang State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences MOE Key Laboratory of Groundwater Circulation & Environment Evolution China University of Geosciences School of Water Resources and Environment China University of Geosciences

Isotopic and chemical compositions of pore water(PW) are highly relevant to environmental and forensic study. Five lake water(LW)samples and five sediment samples were collected to investigate the effects of pore sizes of sediments on PW chemistry and stable isotopes and determine mechanisms controlling their variations. Six pore water fractions were extracted from different-sized pores in each sediment sample at six sequential centrifugal speeds for chemical and isotopic analysis. The sediments consisted mainly of quartz, feldspar, and clay minerals. The hydrogen and oxygen isotopic compositions of PW are mainly controlled by the overlying LW, although the lag effect of exchange between overlying LW and PW results in isotopic differences when recharge of LW is quicker than isotopic exchange in PW. Identical isotopic compositions of PW from sediments with different pore sizes indicate that isotopic exchange of water molecules with different pore sizes is a quick process. The ratio of average total dissolved solid(TDS) concentration of PW to TDS concentration of LW shows a strong relationship with adsorption capacity of sediments, demonstrating that remobilization of ions bound to sediments mainly causes a chemical shift from LW to *** of Ca^(2+), Mg^(2+),and Cl^-in PW remain unchanged,while concentrations of Na^+,K^+,and SO_4^(2-) slightly increase with decreasing pore size. Chemical differences of PW from sediments with different pore sizes are governed by ion adsorption properties and surface characteristics of different-si zed particles.

关键词： Pore size Centrifugal extraction Hydrogen and oxygen isotopes Major ions Remobilization

EFFECT OF DRILLPIPE ROTATION ON BOREHOLE CLEANING FOR EXTENDED REACH WELL

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Journal of Hydrodynamics 2009年第3期21卷 366-372页

作者： WANG Zhi-ming guo Xiao-le LI ming HONG Yu-kui College of Oil and Gas Engineering China University of Petroleum Beijing 102249 China

Wellbore cleaning is a key technology for the Extended Reach Drilling （ERD）. The success of drilling extended reach wells depends directly upon the quality of wellbore cleaning. The rotation of the drillpipe, and hydraulic and rheological parameters, are the key factors for wellbore cleaning. In this study, Computational Fluid Dynamics （CFD） is applied to simulate solid-liquid two-phase flows in wellbore annulus. The annual flow field with the presence of drillpipe rotation is described through analyzing various rotation conditions. The results indicate that the quasi-spiral flow is the main flow pattern for liquid-solid transport in the horizontal annulus. The influence of rotation on the cuttings transport is also investigated, as the rotation of drillpipe increases the disturbance of liquid to solid in annulus. As a result, the solid flow becomes favorable and the solid volume is reduced. Comparisons with previously published results are also performed to prove the importance of drillpipe rotation in the wellbore clearing for the ERD.

关键词： Extended Reach Drilling (ERD) borehole cleaning solid-liquid two-phase flow drillpipe rotation simulation spiral flow

Optimization of Preventive Grinding of Backup Roll against Contact Fatigue Cracking

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Journal of Iron and Steel Research International 2005年第3期12卷 28-33,45页

作者： DOUPeng LIYou-guo LIANGKai-ming BAIBing-zhe TsinghuaUniversity Beijing100084China

In order to optimize the current grinding procedure of the backup roll of 2050 continuously variable crown (CVC) mills, the behavior of rolling contact fatigue (RCF) cracking was investigated. Two RCF short cracks, including vertical short crack and ratcheting short crack initiated from ratcheting, were observed. The behavior of both RCF cracks was analyzed in detail. Then a modified grinding procedure was proposed according to the behavior of RCF cracks and the preventive grinding strategy.

关键词： rolling contact fatigue short crack vertical short crack ratcheting short crack 2050 CVC hot rolling mill preventive grinding