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Journal of Meteorological research 2024年第4期38卷 768-783页

作者： Yanyang hU Xiaolei zou Joint Center of Data Assimilation for research and Application Nanjing University of Information Science&TechnologyNanjing 210044

Geostationary Operational Environmental Satellite-16(GOES-16) Advanced Baseline Imager(ABI) observations of brightness temperature(TB) are used to examine the temporal evolutions of convection-affected structures of hurricane Irma(2017) during its rapid intensification(rI) period from 0600 to 1800 UTC 4 September *** ABI observations reveal that both an elliptical eye and a spiral rainband that originated from Irma's eyewall obviously exhibit wavenumber-2 TB *** elliptical eye underwent a counterclockwise rotation at a mean speed of a wavenumber-2 vortex rossby edge wave from 0815 to 1005 UTC 4 *** the following about 2 hours(1025–1255 UTC 4 September),an inner spiral rainband originated from the eyewall and propagated at a phase speed that approximates the vortex rossby wave(VrW) phase speed calculated from the aircraft reconnaissance *** the rI period of Irma,ABI TB observations show an on–off occurrence of low TB intrusions into the eye,accompanying a phase lock of eyewall TB asymmetries of wavenumbers 1 and 2 and an outward propagation of VrW-like inner spiral rainbands from the *** phase lock leads to an energy growth of Irma's eyewall *** the eye remained clear from 1415 to 1725 UTC 4 September,an inner spiral rainband that originated from a large convective area also had a VrW-like outward propagation,which is probably due to a vertical tilt of *** study suggests a potential link between convection sensitive GOES imager observations and hurricane dynamics.

关键词： Geostationary Operational Environmental Satellite(GOES)imager brightness temperature(TB) hurricane vortex rossby wave(VrW)

A Note on Supersaturated Design

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Acta Mathematicae Applicatae Sinica 2022年第3期38卷 729-739页

作者： Na zou hong QIN School of Statistics and Mathematics Zhongnan University of Economics and LawWuhan 430073China Faculty of Mathematics and Statistics Central China Normal UniversityWuhan 430079China

Supersaturated designs are common choice for screening *** paper studies the properties of supersaturated *** give new lower bounds of E(s^(2))-criterion and E(f_(NOD))-*** linkages between the combined/double design and its original design are firstly provided,and the lower bounds of E(s^(2)) and E(f_(NOD)) for the combined/double design are also ***,the close relationship between the minimum Lee-moment aberration criterion and the criteria for optimal supersaturated designs is *** theoretical results can be used to construct or search for optimal supersaturated designs in *** results are also provided,which lend further support to our theoretical findings.

关键词： supersaturated design E(s^(2))-criterion E(f_(NOD))-criterion minimum Lee-moment aberration criterion foldover double

Establishing distinctive theories and methods of design science rooted in Chinese traditional culture

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Frontiers of Mechanical Engineering 2020年第3期15卷 430-437页

作者： huijun zou Qinghua LIANG School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

The human social development saw the formation of five unique civilizations,with the latter forming their own distinctive ***’s traditional culture is its most fundamental ideological weapon for solving *** Chinese are good at comprehensive thinking,dialectical thinking,and systematic *** ideological weapons can solve the problems of formal science and technology and create scientific and technological achievements on par with global advanced *** China is filled with original scientific and technological achievements,which strongly prove ancient China’s possession of its own science and technology different from that of Western ***,a comprehensive understanding of science,technology,experience,and intuition is *** long-held superstition regarding the West,the lack of confidence,self-denial,blind imitation of ideas,and shackles must be thrown *** then can we take the road toward an authentic Chinese creative design as we learn from others.

关键词： traditional Chinese culture comprehensive thinking systematic analysis Needham’s Grand Question ancient Chinese scientific and technological achievements design driving innovation design theoretical thinking design dialectical methods

Dynamic Development Characteristics and Driving Factors of high Quality Development Level in China’s Five Major Urban Agglomerations

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Chinese Geographical Science 2024年第5期34卷 777-790页

作者： zou Weiyong XU Lingli School of Economics Guangdong Ocean UniversityZhanjiang 524088China School of Economics Shanghai UniversityShanghai 200444China

high-quality development is the primary task of comprehensively building a socialist,modern country,as well as the primary task of building urban agglomerations in *** on the five development concepts,this paper used the entropy method to measure the high Quality Development Index(hQDI)of the five major urban *** results showed that the hQDI of the five major urban agglomerations shows a fluctuating upward ***,using the Dagum Gini coefficient to explore the sources of hQDI development differences in urban agglomerations,we found that the main source of hQDI differences in urban agglomerations was inter-regional differences,while intra-regional differences were not ***,kernel density estimation was used to test the dynamic evolution trend of hQDI within urban *** was a polarisation phenomenon in the hQDI of urban agglomerations,such as the Pearl river Delta urban agglomeration and the Chengdu-Chongqing urban *** overall,the degree of imbalance had ***,using geographic detectors to examine the driving factors of hQDI in urban agglomerations,we found that the main driving forces for improving hQDI in urban agglomerations were economic growth,artificial intelligence technology and fiscal *** the interaction factors had greater explanatory power for the spatial differentiation of hQDI,which can be divided into two types:two-factor improvement and non-linear *** study is conducive to improving and enriching the theoretical system for evaluating the high quality development of urban agglomerations,and provides policy references for promoting the high quality development of urban agglomerations.

关键词： urban agglomeration high Quality Development Index(hQDI) spatio-temporal evolution driving factors

rCV-based error density estimation in the ultrahigh dimensional additive model

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Science China Mathematics 2022年第5期65卷 1003-1028页

作者： Feng zou hengjian Cui School of Mathematical Sciences Capital Normal UniversityBeijing 100048China

In this paper,we mainly study how to estimate the error density in the ultrahigh dimensional sparse additive model,where the number of variables is larger than the sample ***,a smoothing method based on B-splines is applied to the estimation of regression ***,an improved two-stage refitted crossvalidation(rCV)procedure by random splitting technique is used to obtain the residuals of the model,and then the residual-based kernel method is applied to estimate the error density *** suitable sparse conditions,the large sample properties of the estimator,including the weak and strong consistency,as well as normality and the law of the iterated logarithm,are ***,the relationship between the sparsity and the convergence rate of the kernel density estimator is *** methodology is illustrated by simulations and a real data example,which suggests that the proposed method performs well.

关键词： ultrahigh dimensional additive model B-spline kernel density estimation refitted cross-validation method asymptotic property

Convection-Permitting Simulations of Current and Future Climates over the Tibetan Plateau

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Advances in Atmospheric Sciences 2024年第10期41卷 1901-1916页

作者： Liwei zou Tianjun ZhOU LASG Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The Tibetan Plateau(TP)region,also known as the“Asian water tower”,provides a vital water resource for downstream *** studies of water cycle changes over the TP have been conducted with climate models of coarse resolution in which deep convection must be *** this study,we present results from a first set of highresolution climate change simulations that permit convection at approximately 3.3-km grid spacing,with a focus on the TP,using the Icosahedral Nonhydrostatic Weather and Climate Model(ICON).Two 12-year simulations were performed,consisting of a retrospective simulation(2008–20)with initial and boundary conditions from ErA5 reanalysis and a pseudoglobal warming projection driven by modified reanalysis-derived initial and boundary conditions by adding the monthly CMIP6 ensemble-mean climate change under the SSP5-8.5 *** retrospective simulation shows overall good performance in capturing the seasonal precipitation and surface air *** the central and eastern TP,the average biases in precipitation(temperature)are less than−0.34 mm d−1(−1.1℃)throughout the *** simulated biases over the TP are ***(wet)biases are found in summer(winter)above 5500 *** future climate simulation suggests that the TP will be wetter and warmer under the SSP5-8.5 *** general features of projected changes in ICON are comparable to the CMIP6 ensemble projection,but the added value from kilometer-scale modeling is evident in both precipitation and temperature projections over complex topographic *** ICON-downscaled climate change simulations provide a high-resolution dataset to the community for the study of regional climate changes and impacts over the TP.

关键词： dynamical downscaling convection-permitting Tibetan Plateau pseudo-global warming

Study of corrective abrasive finishing for plane surfaces using magnetic abrasive finishing processes

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Nanotechnology and Precision Engineering 2021年第3期4卷 1-11页

作者： Yulong Zhang Yanhua zou Graduate School of Engineering Utsunomiya University7-1-2YotoUtsunomiyaTochigi 321-8585Japan

On the basis of ordinary plane magnetic abrasive finishing,a finishing method is proposed that can improve the flatness of a plane *** this method,the feed speed is varied during finishing according to the profile curve of the initial surface and the material removal efficiency,to control the effective finishing time in different areas and thereby improve the surface flatness.A small magnetic pole with an end face diameter of 1 mm is designed,and a ferromagnetic plate is placed under the workpiece to improve the uniformity of the magnetic field distribution near the magnetic *** experiment on an A5052 aluminum alloy plate workpiece shows that after 60 min of finishing using the proposed method,the extreme difference of the workpiece surface can be reduced from 14.317μm to 2.18μm,and the standard deviation can be reduced from 3.322μm to 0.417μ*** the same time,according to the measurement results,a similar flatness can be achieved at different positions on the finishing ***,the proposed variable-speed finishing method leads to obvious improvements in flatness.

关键词： Variable speed Magnetic abrasive finishing Corrective abrasive finishing Finishing efficiency Surface flatness Aluminum alloy(A5052)

Unlicensed Band Sharing Based on Bargaining Game for heterogeneous Networks

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China Communications 2022年第12期19卷 129-141页

作者： haixia Cui Shujie zou School of Electronics and Information Engineering South China Normal UniversityFoshan 528225China School of Physics and Telecommunication Engineering South China Normal UniversityGuangzhou 510006China

Currently,limited licensed frequency bands cannot meet the increasing demands for various wireless communication applications any *** is necessary to extend wireless communication networks to unlicensed *** this paper,we propose a new bargaining framework for unlicensed band access to achieve high spectrum efficiency,where one radio access technology(rAT)(such as macro cellular network)“competes”the unlicensed bands with multiple other rATs(such as small cellular networks or Wi-Fi)*** that macro cell can share unlicensed frequencies with multiple small cells which are in the same coverage area for more freedom,we use bargaining game theory to fairly and effectively share the unlicensed spectrum between macro and multiple heterogeneous small cell networks,where bargaining loss and time dissipation loss for virtual“price”of unlicensed bands are mainly *** the oneto-many bargaining process,we also develop a multiple rAT alliance game strategy to reduce transmission loss in a joint *** results show that the proposed unlicensed band sharing algorithm significantly improves the spectrum efficiency performance compared with the other practical schemes for heterogeneous networks.

关键词： unlicensed spectrum bargaining game alliance game one-to-many bargaining game

Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture

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Journal of rock Mechanics and Geotechnical Engineering 2020年第4期12卷 732-741页

作者： Liangchao zou Vladimir Cvetkovic Division of resources Energy and InfrastructureDepartment of Sustainable DevelopmentEnvironmental Science and EngineeringRoyal Institute of TechnologyStockholm10044Sweden Department of Physical Geography Stockholm UniversityStockholm10691Sweden

The impact of normal stress-induced closure on fluid flow and solute transport in a single rock fracture is demonstrated in this *** fracture is created from a measured surface of a granite rock *** Bandis model is used to calculate the fracture closure due to normal stress,and the fluid flow is simulated by solving the reynold *** Lagrangian particle tracking method is applied to modeling the advective transport in the *** results show that the normal stress significantly affects fluid flow and solute transport in rock *** causes fracture closure and creates asperity contact areas,which significantly reduces the effective hydraulic aperture and enhances flow ***,the reduced aperture and enhanced channeling affect travel time *** particular,the enhanced channeling results in enhanced first arriving and tailing behaviors for solute *** fracture normal stiffness correlates linearly with the 5th and 95th percentiles of the normalized travel *** finding from this study may help to better understand the stress-dependent solute transport processes in natural rock fractures.

关键词： Normal stress Fluid flow Solute transport Stiffness Particle tracking

Bifurcation and multiplicity of positive solutions for nonhomogeneous fractional Schrödinger equations with critical growth

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Science China Mathematics 2020年第8期63卷 1571-1612页

作者： Xiaoming he Wenming zou College of Science Minzu University of ChinaBeijing 100081China Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

In this paper we study the nonhomogeneous semilinear fractional Schr?dinger equation with critical growth{(−∆)su + u = u^2∗s−1 + λ(f(x, u) + h(x)), x ∈ r^N ,u ∈ hs(r^N ), u(x) > 0, x ∈ rN ,where s∈(0,1),N>4 s,andλ>0 is a parameter,2s*=2 N/N-2 s is the fractional critical Sobolev exponent,f and h are some given *** show that there exists 0h that the problem has exactly two positive solutions ifλ∈(0,λ*),no positive solutions forλ>λ*,a unique solution(λ*,uλ*)ifλ=λ*,which shows that(λ*,uλ*)is a turning point in hs(rN)for the *** proofs are based on the variational methods and the principle of concentration-compactness.

关键词： fractional Schrödinger equation bifurcation and multiplicity concentration-compactness principle critical Sobolev exponent