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The low-frequency variance of the ocean surface wave field in the area of the Antarctic Circumpolar Current

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Acta Oceanologica Sinica 2013年第5期32卷 15-21页

作者： zhang xiaoshuang WU Kejian WANG Bin WANG Zhifeng Ocean University of China Key Laboratory of Marine Environmental Information Technology National Marine Data and Information ServiceState Oceanic Administration Physical Oceanography Laboratory Ocean University of China

The low-frequency variance of the surface wave in the area of the Antarctic Circumpolar Current （ACC） and its correlation with the antarctic circumpolar wave （ACW） are focused on. The analysis of the series of 44 a significant wave height （SWH） interannual anomalies reveals that the SWH anomalies have a strong periodicity of about 4-5 a and this signal propagates eastward obviously from 1985 to 1995, which needs about 8 a to complete a mimacircle around the earth. The method of empirical orthogonal function （EOF） is used to analyze the filtered monthly SWH anomalies to study the spatio-temporal distributions and the propagation characteristics of the low-frequency signals in the wave field. Both the dominant wavenumber- 2 pattern in space and the propagation feature in the south Pacific, the south Atlantic and the south Indian ocean show strong consistency with the ACW. So it is reasonable to conclude that the ACW signal also exists in the wave field. The ACW is important for the climate in the Southern Ocean, so it is worth to pay more attention to the large- scale effect of the surface wave, which may also be important for climate studies.

关键词： significant wave height antarctic circumpolar wave empirical orthogonal function low-frequ-ency variance

PEDOT:PSS:From conductive polymers to sensors

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Nanotechnology and Precision Engineering 2021年第4期4卷 89-107页

作者： xiaoshuang zhang Wentuo Yang Hainan zhang Mengying Xie Xuexin Duan State Key Laboratory of Precision Measuring Technology and Instruments Tianjin UniversityTianjin 300072China

PEDOT:PSS conductive polymers have received tremendous attention over the last two decades owing to their high conductivity,ease of processing,and *** a flexible versatile material,PEDOT:PSS can be developed into various forms and has had a significant impact on emerging sensing *** review covers the development of PEDOT:PSS from material to physical *** focus on the morphology of PEDOT:PSS in the forms of aqueous dispersions,solid films,and *** processes are summarized,including coating,printing,and lithography,and there is particular emphasis on nanoimprinting lithography that enables the production of PEDOT:PSS nanowires with superior sensing *** to various physical sensors,for humidity,temperature,pressure,and strain,are ***,we discuss the challenges and propose new directions for the development of PEDOT:PSS.

关键词： PEDOT:PSS Conductive polymer Sensor Physical sensor Manufacturing process Morphology

Improving the estimate of wind energy input into the Ekman layer within the Antarctic Circumpolar Current

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Acta Oceanologica Sinica 2013年第3期32卷 19-27页

作者： zhang Yuming WU Kejian zhang xiaoshuang BI Fan SONG Zhaoyang LIU Shouhua Physical Oceanography Laboratory Ocean University of China Key Laboratory of Marine Environmental Information Technology State Oceanic AdministrationNational Marine Data and Information Service National Marine Data & Information Service

Based on the data and method offered by Liu et al. （2009）, the direct wind and Stokes drift-induced energy inputs into the Ekman layer within the Antarctic Circumpolar Current （ACC） area are reestimated since the results of the former have been proved to be underestimated. And the result shows that the total rate of energy input into the Ekman-Stokes layer within the ACC area is 852.41 GW, including 649.75 GW of direct wind energy input （76%） and 202.66 GW of Stoke drift-induced energy input （24%）. Total increased energy input, due to wave-induced Coriolis-Stokes forcing added to the classical Ekman model, is 52.05 GW, accounting for 6.5% of the wind energy input into the classical Ekman layer. The long-term variability of direct wind and Stokes drift-induced energy inputs into the Ekman layer within the ACC is also investigated, and the result shows that the Stokes drift hinders the decadal increasing trend of direct wind energy input. Meanwhile, there is a period of 4-5 a in the energy spectrums, as same as the Antarctic circumpolar wave.

关键词： energy input Ekman-Stokes layer Coriolis-Stokes forcing Antarctic Circumpolar Current

Prunus sunhangii: A new species of Prunus from central China

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Plant Diversity 2019年第1期41卷 19-25页

作者： xiaoshuang zhang Zhilin Jiang Ziyoviddin Yusupov Menghua zhang Daigui zhang Komiljon Tojibaev Ying Meng Tao Deng Key Laboratory of Plant Resources Conservation and Utilization Jishou University Puer University Institute of Comparative Study of Traditional Materia Medica Institutes of Integrative Medicine Fudan University Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of Botany Chinese Academy of Sciences Central Herbarium of Uzbekistan Institute of Botany Academy Sciences of Uzbekistan

A new species of Rosaceae from Central China, Prunus sunhangii D. G. zhang & T. Deng, sp. nov., is described and illustrated. The new species is placed in Prunus subgenus Cerasus by flower and fruit characteristics. It is most similar to Prunus cerasoides, but differs by having longitudinally 2-lobed apical petals, an acuminate leaf apex, 17—25 stamens, white petals, dark black drupes, brown hypanthium, and different phenology. The phylogenetic placement of this species was assessed based on morphological and molecular data. Molecular analysis(cp DNA + ITS) corroborated its placement in subgenus Cerasus,specifically Prunus section Serrula.

关键词： Phylogenetic analyses Taxonomy Cerasus Section Serrula

A numerical estimation of the impact of Stokes drift on upper ocean temperature

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Acta Oceanologica Sinica 2014年第7期33卷 48-55页

作者： zhang xiaoshuang WANG Zhifeng WANG Bin WU Kejian HAN Guijun LI Wei Key Laboratory of Marine Environmental Information Technology National Marine Data and Information ServiceState Oceanic Administration Ocean University of China National Ocean Technology Center State Oceanic Administration

The impact of Stokes drift on the mixed layer temperature variation was estimated by taking into account an advective heat transport term induced by the Stokes drift in the equation of mixed layer temperature and using the oceanic and wave parameters from a global ocean circulation model （HYCOM） and a wave model （Wave Watch III）. The dimensional analysis and quantitative estimation method were conducted to assess the importance of the effect induced by the Stokes drift and to analyze its spatial distribution and seasonal variation characteristics. Results show that the contribution of the Stokes drift to the mixed layer temperature variation at mid-to-high latitudes is comparable with that of the mean current, and a substantial part of mixed layer temperature change is induced by taking the Stokes drift effect into account. Although the advection heat transport induced by the Stokes drift is not the leading term for the mixed layer temperature equation, it cannot be neglected and even becomes critical in some regions for the simulation of the upperocean temperature.

关键词： sea surface waves Stokes drift mixed layer temperature

Highly stable aqueous phase black phosphorus quantum dots with enhanced fluorescence property

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Journal of Materials Science & Technology 2022年第21期116卷 50-57页

作者： Yingli Ma Xiaoguang Xu xiaoshuang zhang Mayifei Rong Liying Lu Yan Li Wenhao Dai Hongwu Du Yong Jiang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China

Black phosphorus quantum dots(BPQDs)are a kind of outstanding optical material due to the tunable band ***,their fluorescence property and stability are obviously weakened in the aqueous phase,which extremely restricts the development of ***,we propose a new method to prepare stable BPQDs in an aqueous solution directly with high absolute fluorescence quantum *** phase BPQDs are synthesized by liquid exfoliation and hydrothermal with NH_(2)-polyethylene glycol(PEG)-NH_(2) as the modification agent to protect the BPQDs,which have high stability more than six *** addition,NH_(2)-PEG-NH_(2) is also a surface passivation agent to enhance the emission of BPQDs by forming P-N bonds,which is confirmed by an absolute fluorescent quantum yield of 11.5%.Moreover,BPQDs show excellent resistance to a strong acid environment and high ionic strengths except for Fe^(3+).Therefore,the BPQDs are a kind of highly selective and linear response fluorescence probe for Fe^(3+).Considering the good biocompatibility of BPQDs,they are employed as cell fluorescent label probes and show excellent fluorescence imaging *** on the unique structural stability and fluorescence performance in the aqueous phase,BPQDs are potential candidates for Fe^(3+)detection and optical bio-imaging.

关键词： Black phosphorus Quantum dots Fluorescence Iron detection Cell imaging

Plasmon Bi in-situ anchored on BiOCl nanosheets assembled microspheres towards optimized photothermal-photocatalytic performance

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Chinese Chemical Letters 2024年第2期35卷 469-476页

作者： Dongxue Song Mingxia Li Fan Yang Menghan Yu Zhenzi Li Jie Chen xiaoshuang zhang Wei Zhou School of Chemistry and Materials Science Key Laboratory of Functional Inorganic Material ChemistryMinistry of Education of the People's Republic of ChinaHeilongjiang UniversityHarbin 150080China Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical EngineeringQilu University of Technology (Shandong Academy of Sciences)Ji'nan 250353China

Interface engineering is of great importance to improve the photocatalytic ***,in-situ formation plasmon Bi/BiOCl nanosheets assembled heterojunction microspheres are fabricated via facile reductive solvothermal *** aldehyde group in the DMF structure is used to exert the weak reducing property of the solvent and thus strip out the metal Bi in *** metal Bi is anchored on surface of BiOCl firmly due to in-situ formation engineered interface,which could realize efficient charge transfer *** resultant Bi/BiOCl heterojunctions assemblies with narrow bandgap of 3.05 eV and mesoporous structure extend the photoresponse to visible light region and could provide sufficient surface active *** visible-light-driven photocatalytic degradation of high-toxic norfloxacin for Bi/BiOCl heterojunctions is up to 95.5%within 20 min,representing several times that of pristine BiOCl nanosheets and the physical *** is attributed to the in-situ formation of Bi/BiOCl heterojunctions and surface plasmon resonance(SPR)effect of plasmon Bi promoting charge transfer,and the obvious photothermal effect promoting the photocatalytic reaction,which are verified by experimental and density functional theory(DFT)*** strategy provides ideal perspectives for fabricating metal/semiconductor heterojunctions photocatalysts with high-performance.

关键词： Photocatalysis BiOCl Heterojunction Plasmon Bi Mesoporous structure

A New Multigrid 3D-VAR Optimization Method for Bottom Friction Using HF Radar Current Observation

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Journal of Ocean University of China 2019年第6期18卷 1247-1255页

作者： zhang xiaoshuang WU Xinrong LI Wei WANG Bin ZHU Xiande LIU Kexiu SHAO Caixia SUN Chunjian CHAO Guofang zhang Tiecheng Key Laboratory of Marine Environmental Information Technology National Marine Data and Information ServiceMinistry of Natural ResourcesTianjin 300171China School of Marine Science and Technology Tianjin UniversityTianjin 300072China National Ocean Technology Center Ministry of Natural ResourcesTianjin 300112China Marine Environment Institute Tianjin 300200China

This paper proposes a new method for data assimilation of the surface radial current observed by High Frequency ground wave radar and optimization of the bottom friction *** this method,the shallow water wave equation is introduced into the cost function of the multigrid three-dimensional variation data assimilation method as the weak constraint term,the surface current and the bottom friction coefficient are defined as the analytical variables,and the high spatiotemporal resolution surface radial flow observed by the high-frequency ground wave radar is used to optimize the surface current and bottom friction *** method can effectively consider the spatiotemporal correlation of radar data and extract multiscale information from surface radial flow data from long waves to short *** the shallow water wave equation into the cost function as a weak constraint condition can adjust both the momentum and mass fields simultaneously to obtain more reasonable analysis *** optimized bottom friction coefficient is introduced into the regional ocean numerical model to carry out numerical *** test results show that the bottom friction coefficient obtained by this method can effectively improve the accuracy of the numerical simulation of sea surface height in the offshore area and reduce the simulation error.

关键词： multigrid 3D-VAR optimization radial current velocity bottom friction

Accident Analysis and Emergency Response Effect Research of the Deep Foundation Pit in Taiyuan Metro

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Journal of Donghua University(English Edition) 2020年第3期37卷 199-206页

作者： zhang xiaoshuang FENG Chao HAN Yunshan zhang Jun School of Science North University of ChinaTaiyuan 030051China Key Laboratory of Highway Construction and Maintenance Technology in Loess Region Shanxi Trasnsportaion Research InstitueTaiyuan 030006China

Taking the deep foundation pit accident occurring at a station of metro Line 2 in Taiyuan as an example,the influence of the seepage and inrush of the foundation pit on the retaining structure and surrounding environment were studied under the geological conditions of the confined aquifer on the east coast of Fenhe *** causes of deep foundation pit accident were also analyzed systematically based on the monitoring data,and various emergency measures were proposed to control the occurrence of secondary accident for deep foundation *** results showed that the occurrence of inrush for foundation pit was mainly caused by the insufficient *** development of the accident was effectively controlled by the adding of the dewatering wells,local grouting of retaining structure to stop seepage,surface grouting to reinforcement and uplift *** successful experience can provide some guidance to the construction of similar projects in the proposal.

关键词： metro station deep foundation pit inrush seepage grouting reinforcement