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An ecological perspective on Joseph Rock’s(1884-1962)plant collection activities in China

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Journal of Plant Ecology 2024年第4期17卷 100-113页

作者： Jifan Luo Ruozhi Huang Hai yan Renwu Wu Shuai Liao Zhoubing Xiang Yongxi zou Liangchen Shi ke Wang Zhiyi Bao College of Landscape Architecture Zhejiang Agriculture and Forestry UniversityHangzhou 311300China Zhejiang Agriculture and Forestry University Landscape Architecture Institute Hangzhou 311300China South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China

In the early 20th century,numerous western botanists,often referred to as‘plant hunters’,embarked on ambitious expeditions to China,playing a crucial role in the study of botany and botanical *** their contributions,comprehensive assessments of their explorations are *** bridge this gap,this article focuses on the work of Joseph Charles Francis Rock,a notable figure in that *** work revisits Rock’s botanical expeditions within the broader context of botanical diversity *** outlines his historical experiences in collecting plants in China and enumerates the species composition and phenotypic traits of the plants he ***,it also analyzes the spatial distribution of the species,the completeness of his collection and the α-and β-diversity of the plants he *** findings reveal that Rock led four major botanical expeditions in China between 1922 and 1933,amassing a total of 28184 sheets and 16608 numbers across 204 families,1081 genera and 4231 *** focus was predominantly on ornamental species,which exhibit a variety of flower colors and *** collection work spanned 5 provinces,35 cities and 72 counties,with a notable concentration in the Hengduan Mountains,a current biodiversity *** study not only reconstructs Rock’s botanical legacy but also offers valuable historical data and fresh analytical insights for understanding contemporary plant *** contributes to the ongoing discourse on the importance of preserving plant diversity as a cornerstone of environmental sustainability.

关键词： Joseph Charles Francis Rock plant specimen collection history plant diversity plant collector

Engineering Geological Assessment for Route Selection of Railway Line in Geologically Active Area:A Case Study in China

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Journal of Mountain Science 2013年第4期10卷 495-508页

作者： HUANG Run-qiu LI yan-rong QU ke WANG ke State key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology AGECON Ltd. The Second Survey and Design Institute of China Railways

The Cheng-Lan railway links Chengdu, a central city in Southwestern China, and Lanzhou, a central city in Northwestern China. The railway passes through the Longmenshan fault zone (Wenchuan earthquake happened there on May 12, 2008), Minjiang fault zone, and Dongkunlun fault zone, which are all active. It runs over the yangtze River and the Yellow River, and crosses high mountains and deep valleys. There exists, along the railway's alignment, different kinds of strata of hard granite and soft, weak metamorphic rocks such as carbonaceous slate, schist, and phyllite. It is, therefore, a key issue for such an infrastructure construction to assess the engineering geological conditions and risks, so as to mitigate or avoid possible georisks and to offer optional designs. Geological survey and georisk assessment along the railway corridor are carried out. Special attention is given to active faults, earthquakes and seismic zones. Based on these, discussions about geological aspects for route selection of the railway are conducted and countermeasures for georisk control are proposed accordingly. Main conclusions are achieved as follows: (1) Geohazards such as landslides, rockfalls and debries flows dominate both the route selection of the railway and the engineering structures (e.g., tunnels or bridges) adopted; (2) Tunnel has been proved to be an excellent structure for linear engineering in geologically active area; and (3) In the case where avoiding is impractical, necessary protection measures should be taken to engineering slopes in high earthquake intensity areas, especially the area with earthquake of Ms. 8 or greater.

关键词： Railway route selection Geologicallyactive area Earthquake Active fault

Enhanced Bio-corrosion Resistance by Cu Alloying in a Micro-alloyed Pipeline Steel

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Acta Metallurgica Sinica(English Letters) 2022年第10期35卷 1731-1743页

作者： Yunpeng Zeng Wei yan Xianbo Shi Maocheng yan Yiyin Shan ke yang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China CAS key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

On the composition base of commercial X65 grade pipeline steels,a Cu modified pipeline steel was designed to show improved resistance to microbially induced corrosion(MIC).The mechanical properties of the Cu-added steel and its corrosion behavior in a soil solution inoculated with sulfate-reducing bacteria(SRB)were investigated in this *** results demonstrated that Cu-added steel exhibits a good combination of strength and *** ions released from the Cu-added steel could effectively kill the SRB attaching on the steel surface,thus evidently decreased the pit depth and diameter of Cu-added ***,during the long-term immersion,the Cu-rich film formed by the enrichment of Cu in the corrosion product layer on the steel surface could also contribute to the improvement of the bio-corrosion resistance of Cu-added steel.

关键词： Pipeline steel Mechanical property Microbiologically influenced corrosion Cu alloyed steel Corrosion mechanism Sulfate-reducing bacteria(SRB)

BOUSSINESQ MODELLING OF NEARSHORE WAVES UNDER BODY FITTED COORDINATE

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Journal of Hydrodynamics 2012年第2期24卷 235-243页

作者： FANG ke-zhao zou Zhi-li LIU Zhong-bo YIN Ji-wei State key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024China key Laboratory of Coastal Disaster and Defence Ministry of Eduoation Hohai University Nanjing 210098China E-mail： kfang@***

A set of nonlinear Boussinesq equations with fully nonlinearity property is solved numerically in generalized coordinates,to develop a Boussinesq-type wave model in dealing with irregular computation boundaries in complex nearshore regions and to facilitate the grid refinements in *** governing equations expressed in contravariant components of velocity vectors under curvilinear coordinates are derived and a high order finite difference scheme on a staggered grid is employed for the numerical *** developed model is used to simulate nearshore wave propagations under curvilinear coordinates,the numerical results are compared against analytical or experimental data with a good agreement.

关键词： Boussinesq equation waves body fitted coordinate

Prediction of Seasonal Tropical Cyclone Activity in the NUIST-CFS1.0 Forecast System

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Advances in Atmospheric Sciences 2023年第7期40卷 1309-1325页

作者： ke PENG Jing-Jia LUO yan LIU key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Institute for Climate and Application Research(ICAR)Nanjing University of Information Science and TechnologyNanjing 210044China School of Atmospheric Sciences and Key Laboratory of Mesoscale Severe Weather/Ministry of EducationNanjing UniversityNanjing 210023China

Prediction skill for the seasonal tropical cyclone(TC)activity in the Northern Hemisphere is investigated using the coupled climate forecast system(version 1.0)of Nanjing University of Information Science and Technology(NUISTCFS1.0).This assessment is based on the seven-month(May to November)hindcasts consisting of nine ensemble members during 1982–*** predictions are compared with the Japanese 55-year Reanalysis and observed tropical storms in the Northern *** results show that the overall distributions of the TC genesis and track densities in model hindcasts agree well with the observations,although the seasonal mean TC frequency and accumulated cyclone energy(ACE)are underestimated in all basins due to the low resolution(T106)of the atmospheric component in the ***-CFS1.0 closely predicts the interannual variations of TC frequency and ACE in the North Atlantic(NA)and eastern North Pacific(ENP),which have a good relationship with indexes based on the sea surface *** the western North Pacific(WNP),NUIST-CFS1.0 can closely capture ACE,which is significantly correlated with the El Ni?o–Southern Oscillation(ENSO),while it has difficulty forecasting the interannual variation of TC frequency in this *** the WNP is further divided into eastern and western subregions,the model displays improved TC activity forecasting ***,it is found that biases in predicted TC genesis locations lead to inaccurately represented TC–environment relationships,which may affect the capability of the model in reproducing the interannual variations of TC activity.

关键词： seasonal tropical cyclone activity interannual variation global ocean-atmosphere coupled forecast system

Packing unequal circles into a square container based on the narrow action spaces

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Science China(Information Sciences) 2018年第4期61卷 229-231页

作者： Kun HE Mohammed DOSH yan JIN Shenghao zou School of Computer Science and Technology Huazhong University of Science and Technology Shenzhen Research Institute of Huazhong University of Science and Technology Faculty of Education for Girls Kufa University

The single container packing problem consists of allocating a number of items inside one container in order to find the densest packing patterns without *** an important class of optimization problems,packing problems... 详细信息

关键词： PCI Packing unequal circles into a square container based on the narrow action spaces PAS

Effect of microstructure on the low temperature toughness of high strength pipeline steels

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 254-261页

作者： yan-ping Zeng Peng-yu Zhu ke Tong School of Materials Science and Engineering University of Science and Technology Beijing CNPC Tubular Goods Research Institute

Microstructure observations and drop-weight tear test were performed to study the microstructures and mechanical properties of two kinds of industrial X70 and two kinds of industrial X80 grade pipeline steels. The effective grain size and the fraction of high angle grain boundaries in the pipeline steels were investigated by electron backscatter diffraction analysis. It is found that the low temperature toughness of the pipeline steels depends not only on the effective grain size, but also on other microstructural factors such as martensite-austenite （MA） constituents and precipitates. The morphology and size of MA constituents significantly affect the mechanical properties of the pipeline steels. Nubby MA constituents with large size have significant negative effects on the toughness, while smaller granular MA constituents have less harmful effects. Similarly, larger Ti-rich nitrides with sharp corners have a strongly negative effect on the toughness, while fine, spherical Nb-rich carbides have a less deleterious effect. The low temperature toughness of the steels is independent of the fraction of high angle grain boundaries.

关键词： high strength pipe steels microstrucmre low temperature toughness influencing factors

Transcriptome-based identification and expression analysis of the glutathione S-transferase(GST)family in tree peony reveals a likely role in anthocyanin transport

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Horticultural Plant Journal 2022年第6期8卷 787-802页

作者： Lulu Han Hongzhu zou Lin Zhou yan Wang Research Institute of Forestry Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland AdministrationChinese Academy of ForestryBeijing 100091China

For red-flowered cultivars of tree peony(Paeonia suffruticosa),anthocyanin content is a critical factor determining the different petal *** S-transferases(GSTs)are ubiquitous and multifunctional conjugating proteins that may be responsible for the transport of anthocyanin pigments from the cytoplasm to *** underlying function of the GST family in tree peony,however,remains *** this study,we systematically isolated and identified a total of 54 putative full-length Ps GST genes through a combination of bioinformatics approaches from transcriptome *** phylogenetic analyses revealed extensive differentiation in their coding sequences and divided them into 10 of the 14 known classes of plant *** phylogenetic relationships,evolutionary characteristics,protein domain,and motif organization were clearly conserved among the different phylogenetic *** results of the RNA-seq and quantitative real-time polymerase chain reaction experiments exhibited extensive variation in gene expression profiles among different developmental stages and ***,the phylogenetic relationships,expression profiles,protein interactions,weighted gene co-expression network analysis,and correlation analysis results suggested that PsGSTF3(Unigene 0064200)is a candidate participant in anthocyanin transport and the promotion of pigment accumulation,exhibiting a strong positive correlation with anthocyanin content among different tissues(r=0.908**)and an increasing rate of anthocyanin content during the flower developmental process(r=0.961*).These results furthered our understanding of the transport and accumulation functions of the GST family as well as the enhancement of tree peony breeding through molecular biology techniques.

关键词： GST Paeonia suffruticosa Functional prediction Expression analysis Anthocyanin transportation

Time-Dependent Demographic Prediction Based on Time-Back-Propagation Method

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Chinese Journal of Electronics 2018年第1期27卷 35-40页

作者： ke Yuyang XIONG yan HU Yiqing LIU Shichen School of Computer Science University of Science and Technology of China Department of Computer Science Hefei University

In various applications like personalized search and recommendation, full demographic information is a precondition for many applications’ well performance,but such ideal dataset rarely exists in practical ***’s worse, absence of key characteristics(e.g., baby’s age in maternal and infant commodity recommendation)makes these applications struggle. We design a novel solution to solve the problem of time-dependent demographic prediction. The key insight behind our approach is, we leverage a Time-back-propagation(TBP) method to take the internal time correlation of historical behaviours into consideration and collect all available data to train a classifier, which is a mapping from user’s historical behaviours to the demographic information. We demonstrate the effectiveness of our method through experiments of baby’s age prediction. Our algorithm performs more balanced on each age group, and can predict Baby’s age(BA) accurately in 78.2% on a real-world dataset with 2,058,909 items of a ma jor E-commerce site.

关键词： Time-back-propagation(TBP) Time series Time-dependent demographic prediction