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Linkage Between Winter Temperatures in the Yellow Sea and Atmospheric Circulation Indices

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Journal of Ocean University of China 2019年第2期18卷 261-270页

作者： YUAN chengyi WEI Hao LUO Xiaofan KUANG Xiaodi College of Marine and Environmental Sciences Tianjin University of Science and Technology School of Marine Science and Technology Tianjin University National Marine Environmental Forecasting Center

This study investigated the linkage between winter temperature in the Yellow Sea(YS), China, and atmospheric indices and established this linkage through statistical models. The water temperature was obtained through hindcast simulation using a global–regional nested ocean model for the period of 1958–2007. The interannual variations of the simulated temperature were validated using satellite and in-situ observations. In the YS, the winter sea surface temperature(SST) had obvious interannual variations, with the maximum SST exceeding 2℃, and a significant shift from the cold to warm phase during 1988–1989. Based on the mechanism study, statistical models for the variations of water temperature in the YS were established using suitable atmospheric indices as predictors. For the northern YS(NYS) and the coastal region of the southern YS(SYS), statistical models of SST were established using linear regression based on the December–January–February mean Arctic oscillation index(AOI), representing the dominant large-scale atmospheric variability in boreal winter. For the YS warm current(YSWC) region, statistical models were established using both the AOI and the first principal component of the local wind stress curl(PC1-Curl), derived from the empirical orthogonal functions analysis. The PC1-Curl represents the influence of the local wind stress curl on the west-to-east shifts of the YSWC pathway. The applications proved that the models presented in this study have the ability to estimate winter temperatures in the YS within the recent years.

关键词： water temperature statistical model interannual variations atmospheric variability empirical orthogonal function analysis

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美国儿童阅读推广机制调研及其对我国的启示

大学图书情报学刊 2025年第1期43卷 137-144页

作者：廖颖深圳市南山区图书馆 518000

儿童阅读推广服务不仅是图书馆服务的重点领域,也是其发展的关键环节。文章采用网络调研与文献分析法,系统梳理和分析了美国公共图书馆在儿童阅读推广方面的策略和实践。研究重点包括美国公共图书馆儿童服务的政策框架、实施策略、社会... 详细信息

儿童阅读推广服务不仅是图书馆服务的重点领域,也是其发展的关键环节。文章采用网络调研与文献分析法,系统梳理和分析了美国公共图书馆在儿童阅读推广方面的策略和实践。研究重点包括美国公共图书馆儿童服务的政策框架、实施策略、社会参与、数字化融合、分级阅读推广情况与方式。研究表明,美国通过政策支持、多元化服务模式、紧密的社区与家庭合作、积极适应数字化转型以及注重儿童分级阅读推广等措施,有效满足了儿童的多元化阅读需求,进而提出构建全面的政策框架、深化社区及家庭参与、积极实施分级阅读策略、拥抱数字化转型等建议,以期推动我国儿童阅读推广高质量可持续性发展。

关键词：数字化转型儿童阅读推广实施策略多元化阅读政策框架可持续性发展家庭参与图书馆服务

Spatial Heterogeneity of Embedded Water Consumption from the Perspective of Virtual Water Surplus and Deficit in the Yellow River Basin,China

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Chinese Geographical Science 2024年第2期34卷 311-326页

作者： MA Weijing LI Xiangjie KOU Jingwen LI chengyi College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065China School of Economics and Management Ningxia UniversityYinchuan 750021China

Virtual water trade(VWT)provides a new perspective for alleviating water crisis and has thus attracted widespread ***,the heterogeneity of virtual water trade inside and outside the river basin and its influencing factors remains further *** this study,for better investigating the pattern and heterogeneity of virtual water trade inside and outside provincial regions along the Yellow River Basin in 2015 using the input-output model(MRIO),we proposed two new concepts,i.e.,virtual water surplus and virtual water deficit,and then used the Logarithmic Mean Divisia Index(LMDI)model to identify the inherent mechanism of the imbalance of virtual water trade between provincial regions along the Yellow River Basin and the other four regions in *** results show that:1)in provincial regions along the Yellow River Basin,the less developed the economy was,the larger the contribution of the agricultural sector in virtual water trade,while the smaller the contribution of the industrial sector.2)Due to the large output of agricultural products,the upstream and midstream provincial regions of the Yellow River Basin had a virtual water surplus,with a net outflow of virtual water of 2.7×10^(8) m^(3) and 0.9×10^(8) m^(3),respectively.3)provincial regions along the Yellow River Basin were in a virtual water deficit with the rest of China,and the decisive factor was the active degree of trade with the *** study would be beneficial to illuminate the trade-related water use issues in provincial regions along the Yellow River Basin,which has farreaching practical signific-ance for alleviating water scarcity.

关键词： virtual water trade(VWT) input-output model(MRIO) virtual water surplus virtual water deficit Yellow River Basin,China

Mounded seismic units in the modern canyon system in the Shenhu area,northern South China Sea:Sediment deformation,depositional structures or the mixed system?

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Acta Oceanologica Sinica 2022年第9期41卷 107-116页

作者： Xishuang Li chengyi Zhang Baohua Liu Lejun Liu First Institute of Oceanography Ministry of Natural ResourcesQingdao266061China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China National Deep Sea Center Ministry of Natural ResourcesQingdao266237China

The canyon system,including 17 small slope-confined canyons in the Shenhu area,northern South China Sea,is significantly characterized by mounded or undulating features on the canyon flanks and canyon ***,the mechanism underlying the formation of these features has yet to be *** previous studies,most of them were interpreted as sediment deformation on the exploration seismic *** this paper,we collected high-resolution bathymetric data,chirp profiles and geotechnical test data to investigate their detailed morphology,internal structures,and *** bathymetric data indicated that most mounded seismic units have smooth seafloors and are separated by grooves or *** distance between two adjacent mounded units is only hundreds of *** chirp profiles,mounded seismic units usually exhibit chaotic reflections and wavy reflections,of which the crests migrate *** slope stability analysis results revealed that the critical angle of the soil layers in the study area tends to be 9°,indicating that most mounded seismic units on the canyon flanks and heads are stable at *** terrain characteristics and seismic configurations combined with the slope stability analysis results indicated that most mounded seismic units are not sediment deformation but depositional structures or mixed systems composed of deformation and depositional structures.

关键词： northern South China Sea submarine canyons mounded seismic units chirp profile slope stability

A ratiometric fluorescent probe for hypoxanthine detection in aquatic products based on the enzyme mimics and fluorescence of cobalt-doped carbon nitride

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Food Science and Human Wellness 2024年第2期13卷 879-884页

作者： Xin Wang chengyi Hong Zhengzhong Lin Zhiyong Huang College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China

A ratiometric fluorescent probe for hypoxanthine(Hx)detection was established based on the mimic enzyme and fluorescence characteristics of cobalt-doped graphite-phase carbon nitride(Co doped g-C_(3)N_(4)).In addition to emitting strong fluorescence,the peroxidase activity of Co doped g-C_(3)N_(4)can catalyze the reaction of O-phenylenediamine and H_(2)O_(2)to produce diallyl phthalate which can emit yellow fluorescence at 570 *** the decomposition of Hx by xanthine oxidase,Hx can be indirectly detected by the generating hydrogen peroxide based on the measurement of fluorescent ratio I(F_(570)/F_(370)).The linear range was 1.7-272.2 mg/kg(R^(2)=0.997),and the detection limit was 1.52 mg/kg(3σ/K,n=9).The established method was applied to Hx detection in bass,grass carp,and shrimp,and the data were verified by *** result shows that the established probe is sensitive,accurate,and reliable,and can be used for Hx detection in aquatic products.

关键词： Co doped g-C_(3)N_(4) Ratiometric fluorescent probe Hypoxanthine Freshness Aquatic products

A six-variable quasi-3D isogeometric approach for free vibration of functionally graded graphene origami-enabled auxetic metamaterial plates submerged in a fluid medium

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Applied Mathematics and Mechanics(English Edition) 2025年第1期 157-176页

作者： Wei CHEN Zhihong TANG Yufen liao Linxin PENG College of Civil Engineering University of South China College of Civil Engineering and Architecture Guangxi University Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education Guangxi University

This paper presents, for the first time, an effective numerical approach based on the isogeometric analysis(IGA) and the six-variable quasi-three dimensional(3D)higher-order shear deformation theory(HSDT) to study the free vibration characteristics of functionally-graded(FG) graphene origami(GOri)-enabled auxetic metamaterial(GOEAM) plates submerged in a fluid medium. The plate theory incorporates the thickness stretching and the effects of transverse shear deformation without using any shear correction factors. The velocity potential function and Bernoulli's equation are used to derive the hydrodynamic pressure acting on the plate surface. Both horizontally and vertically immersed plate configurations are considered here in the form of inertia *** plates are composed of multilayer GOEAMs, with the GOri content varying through the plate's thickness in a layer-wise manner. This design results in graded auxetic *** material properties are evaluated by mixing rules and a genetic programming(GP)-assisted micromechanical model. The governing equations of motion for the FG-GOEAM plates immersed in a fluid medium are derived by Hamilton's principle. After validating the convergence and accuracy of the present model, a comprehensive parametric study is carried out to examine the effects of the GOri content, GOri distribution pattern, GOri folding degree, fluid level, immersed depth, and geometric parameter on the natural frequencies of the FG-GOEAM plates. The results show that the natural frequencies for the four GOri distribution patterns increase with the increase in the layer number when the lay number is fewer than 10, and then stabilize after the layer number reaches ***, in general, the natural frequency of the FG-GOEAM plate in a vacuum or fluid increases when the GOri content increases, while decreases when the GOri folding degree increases. Some additional findings related to the numerical results are presented in the conclusions. It is belie

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Stem cell research in hepatocellular carcinoma

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Frontiers of Medicine 2008年第1期2卷 1-4页

作者： chengyi SUN Shi ZUO Department of Hepatobiliary Surgery the Affiliated Hospital of Guiyang Medical CollegeGuiyang 550001China

The traditional view that adult human liver tumors,mainly hepatocellular carcinoma(HCC),arise from mature cell types has been challenged in recent *** results of several studies suggest that HCC can be derived from liver stem *** are four levels of cells in the liver stem cell lineage:hepatocytes,hepatic stem cells/oval cells,bone marrow stem cells and hepato-pancreas stem ***,whether HCC is resulted from the differentiation block of stem cells and,moreover,which liver stem cell lineage is the source cell of hepatocarcinogenesis remain *** this review,we focus on the current status of liver stem cell research and their roles in carcinogenesis of HCC,in order to explore new approaches for stem cell therapy of HCC.

关键词： liver carcinoma,hepatocellular stem cell

Camera localization for augmented reality and indoor positioning:a vision-based 3D feature database approach

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International Journal of Digital Earth 2020年第6期13卷 727-741页

作者： Jing Li chengyi Wang Xuejie Kang Qiang Zhao Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeople’s Republic of China Laboratory of Remote Sensing Image Processing Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China

The recent fast development in computer vision and mobile sensor technology such as mobile LiDAR and RGB-D cameras is pushing the boundary of the technology to suit the need of real-life applications in the fields of Augmented Reality(AR),robotics,indoor GIS and *** localization is often a key and enabling technology among these *** this paper,we developed a novel camera localization workflow based on a highly accurate 3D prior map optimized by our RGBD SLAM method in conjunction with a deep learning routine trained using consecutive video frames labeled with high precision camera ***,an AR registration method tightly coupled with a game engine is proposed,which incorporates the proposed localization algorithm and aligns the real Kinetic camera with a virtual camera of the game engine to facilitate AR application development in an integrated *** experimental results show that the localization accuracy can achieve an average error of 35 cm based on a fine-tuned prior 3D feature database at 3 cm accuracy compared against the ground-truth 3D LiDAR *** influence of the localization accuracy on the visual effect of AR overlay is also demonstrated and the alignment of the real and virtual camera streamlines the implementation of AR fire emergency response demo in a Virtual Geographic Environment.

关键词： Augmented reality(AR) virtual geographic environment(VGE) indoor positioning indoor GIS LiDAR 3D reconstruction localization camera pose

Fluoride-mediated nano-sized high-silica ZSM-5 as an ultrastable catalyst for methanol conversion to propylene

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Journal of Energy Chemistry 2018年第4期27卷 1225-1230页

作者： Junjie Li Min Liu Xinwen Guo chengyi Dai Chunshan Song State Key Laboratory of Fine Chemicals PSU-DUT Joint Centre for Energy Research School of Chemical Engineering Dalian University of Technology Department of Energy and Mineral Engineering EMS Energy Institute PSU-DUT Joint Centre for Energy Research Pennsylvania State University

Fluoride mediated nano-sized ZSM-5 （ZSM-5-F） with a high Si/AI ratio of 181 was fabricated using a seed-induction method and evaluated the catalysis of the methanol to propylene （MTP） reaction. High propylene selectivity （45%） was similar to ZSM-5-OH synthesized via a hydroxide route. However, ZSM- 5-F showed much longer lifetime （305 h） compared with ZSM-5-OH （157 h） in spite of similar crystal size and aluminum content. Characterization by NH3-TPD. Py-IR, OH-IR, SEM, TG-DTA, XRD and 1H MAS NMR techniques indicated that the enhanced catalytic performance of ZSM-S-F is attributed to the fewer structural defects in the form of internal silanol groups and silanol nests.

关键词： Fluoride route Nano-sized High Si/Al Structural defects MTP