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An ocean-land-atmosphere coupled model for tropical cyclone landfall processes: The multi-layer ocean model and its verification

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Acta Oceanologica Sinica 2006年第2期25卷 33-48页

作者： DUAN Yihong YU Runling li yongping Shanghai Typhoon Institute of China Meteorological Administration Shanghai 200030China

POM (Princeton ocean model) tentatively taken as the ocean part of an ocean-land atmosphere coupled modcl is verified for the ultimate purpose of studying the landfall process of tropical cyclone (TC) in the western North Pacific. The POM is tested with monthly mean wind stress in the summer and given lateral boundary conditions. The results indicate that the equilibrium state of the ocean is in accordance with the climate mean, with the error in sea surface temperature (salinity) less than 0.5 ℃ (0.5). The simulated occan currents are reasonable as *** numerical experiments are designed to verify the oceanic response to a stationary or moving TC. It is found that the results agree fairly well with the previous work, including both the drop magnitude and the distribution ofsca temperature. Compared with the simple two-layer ocean model used by some other studies, the response of the ocean to a TC is more logical here. The model is also verified in a real case with a TC passing the neighborhood of a buoy station. It is shown that the established ocean model can basically reproduce the sea surface temperature change as observed.

关键词： tropical cyclone ocean coupled model

Electronic Structure of Si-C Alloys

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Chinese Physics Letters 1994年第11期11卷 689-692页

作者： li yongping ZHANG Haifeng HUANG Xintang Department of Physics and Structural Research Laboratory University of Science and Technology of ChinaHefei 230026 Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026 Department of Physics Huazhong Normal UniversityWuhan 430070

We have systematically studied the electronic structure of the ordered Si-C alloys,fourteen models were created according to the different carbon *** linear muffin-tin orbitals method was used to calculate their energy band *** functional relation of band gap upon carbon contents conflicts with the point of view of Soref[***.56(1990)734],but agrees well with that of Alexander's[***.B 48(1993)2207].

关键词： alloys Alloys ordered

The Jackson Inequality for the Best L^2-Approximation of Functions on [0,1] with the Weight x

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Numerical Mathematics(Theory,Methods and Applications) 2008年第3期1卷 340-356页

作者： Jian li yongping liu School of Mathematical Sciences Beijing Normal University Beijing 100875China

Let L^2（[0, 1], x） be the space of the real valued, measurable, square summable functions on [0, 1] with weight x, and let n be the subspace of L2（[0, 1], x） defined by a linear combination of Jo（μkX）, where Jo is the Bessel function of order 0 and {μk} is the strictly increasing sequence of all positive zeros of Jo. For f ∈ L^2（[0, 1], x）, let E（f, n） be the error of the best L2（[0, 1], x）, i.e., approximation of f by elements of n. The shift operator off at point x ∈[0, 1] with step t ∈[0, 1] is defined by T（t）f（x）=1/π∫0^π f（√x^2 ＋t^2-2xtcosO）dθ The differences （I- T（t））^r/2f = ∑j=0^∞（-1）^j（j^r/2）T^j（t）f of order r ∈ （0, ∞） and the L^2（[0, 1],x）- modulus of continuity ωr（f,τ） = sup{｜｜（I- T（t））^r/2f｜｜：0≤ t ≤τ] of order r are defined in the standard way, where T^0（t） = I is the identity operator. In this paper, we establish the sharp Jackson inequality between E（f, n） and ωr（f, τ） for some cases of r and τ. More precisely, we will find the smallest constant n（τ, r） which depends only on n, r, and % such that the inequality E（f, n）≤ n（τ, r）ωr（f, τ） is valid.

关键词： Jackson inequality modulus of continuity best approximation Bessel function.

Analysis and prognosis of tropical cyclone genesis over the western North Pacific on the background of global warming

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Acta Oceanologica Sinica 2007年第1期26卷 23-34页

作者： li yongping WANG Xiaofeng YU Runling QIN Zenghao Open Laboratory for Typhoon Research Shanghai Typhoon Institute China Meteorological Administration Shanghai 200030

As revealed by the observational study, there are more tropical cyclones generated over the western North Pacific from the early 1950s to the early 1970s in the 20th century and less tropical cyclones from the mid-1970s to the present. The decadal change of ＂tropical cyclones activities are closely related to the decadal changes of atmospheric general circulation in the troposphere, which provide favorable or unfavorable conditions for the formation of tropical cyclone. Furthermore, based on the simulation of corresponding atmospheric general circulation from a coupled climate model under the schemes of Intergovemmental Panel on Climate Change （IPCC）,special report on emission scenarios （SRES） A2 and B2 emissions scenarios an outlook on the tropical cyclone frequency generated over the western North Pacific in the coming half century is presented. It is indicated that in response to the global climate change the general circulation of atmosphere would become unfavorable for the formation of tropical cyclone as a whole and the frequency of tropical cyclones formation would likely decrease by 5% within the next half century, although more tropical cyclones would appear during a short period in it.

关键词： IPCC SRES A2 and B2 general circulation anomaly frequency of tropical cyclone

An inexact risk management model for agricultural land-use planning under water shortage

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Frontiers of Earth Science 2016年第3期10卷 419-431页

作者： Wei li Changchun FENG Chao DAI yongping li Chunhui li Ming liU College of Urban and Environmental Science Peking University Beijing 100871 China College of Environmental Science and Engineering Peking University Beijing 100871 China Sino-Canada Resources and Environmental Research Academy North China Electric Power University Beijing 102206 China School of Environment Beijing Normal University Beijing 100875 China

Water resources availability has a significant impact on agricultural land-use planning, especially in a water shortage area such as North China. The random nature of available water resources and other uncertainties in an agricultural system present risk for land-use planning and may lead to undesirable decisions or potential economic loss. In this study, an inexact risk management model （IRM） was developed for supporting agricultural land-use planning and risk analysis under water shortage. The IRM model was formulated through incorporating a conditional value-at-risk （CVaR） constraint into an inexact two-stage stochastic programming （ITSP） framework, and could be used to control uncertainties expressed as not only probability distributions but also as discrete intervals. The measure of risk about the second-stage penalty cost was incorporated into the model so that the trade-off between system benefit and extreme expected loss could be analyzed. The developed model was applied to a case study in the Zhangweinan River Basin, a typical agricultural region facing serious water shortage in North China. Solutions of the IRM model showed that the obtained first-stage land-use target values could be used to reflect decision-makers＇ opinions on the long-term devel- opment plan. The confidence level a and maximum acceptable risk loss fl could be used to reflect decision- makers＇ preference towards system benefit and risk control. The results indicated that the IRM model was useful for reflecting the decision-makers＇ attitudes toward risk aversion and could help seek cost-effective agricul- tural land-use planning strategies under complex uncer- tainties.

关键词： agricultural land-use planning risk manage-ment CVaR uncertainty water shortage

Establishment of Retinoblastoma Model in NOD-SCID Mice and Study of Metastasis

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Eye Science 2005年第3期21卷 185-191页

作者： Bo Zhang yongping li Zhonshan Ophthalmic Center Sun Yat-sen University Guangzhou 510060 China

Purpose: To establish model of retinoblastoma subcutaneously in NOD-SCID mice and study rules of formation and distribution of retinoblastoma ***: Retinoblastoma cells SO-RB50 were inoculated subcutaneously in NOD-SCID mice. Animal acts and tumor formation, growth and metastasis in NOD-SCID mice were observed. Primary and metastatic tumors were studied pathohistologically by HE and immunohistochemical ***: The latent periods of tumor growth were 12～19 days and the taken rate of tumor was 100%. 32 days later, 5 NOD-SCID mice were found with tumors that had metastasized to areas mainly located in the abdominal cavity and the side of the kidney; the metastatic time of tumors in the mice also differed. The tumor cells of the primary nodules and the metastasis were similar with human retinoblastoma cells and positive in immunohistochemical staining of ***: The subcutaneous model of retinoblastoma in NOD-SCID mice showed a high taken rate and a short latent period of tumor, which had a high metastatic rate and was the best model in research of behaviors of retinoblastoma at present.

关键词：眼癌动物实验 NOD-SCID 小鼠肿瘤转移

Reannotation of the cultivated strawberry genome and establishment of a strawberry genome database

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Horticulture Research 2021年第1期8卷 590-598页

作者： Tianjia liu Muzi li Zhongchi liu Xiaoyan Ai yongping li Institute of Fruit and Tea Hubei Academy of Agricultural Sciences/Fruit and Tea Subcenter of Hubei Innovation Center of Agricultural Science and TechnologyWuhanChina Department of Cell Biology and Molecular Genetics University of Maryland College ParkCollege ParkMDUSA School of life Sciences and State Key Laboratory of Agrobiotechnology Chinese University of Hong KongShatinHong KongChina

Cultivated strawberry(Fragaria×ananassa)is an important fruit crop species whose fruits are enjoyed by many *** octoploid of hybrid origin,the complex genome of this species was recently sequenced,serving as a key reference genome for cultivated strawberry and related species of the Rosaceae *** current annotation of the *** genome mainly relies on ab initio predictions and,to a lesser extent,transcriptome ***,we present the structure and functional reannotation of the *** genome based on one PacBio full-length RNA library and ninety-two Illumina RNA-Seq *** improved annotation of the *** genome,v1.0.a2,comprises a total of 108,447 gene models,with 97.85%complete *** models of 19,174 genes were modified,360 new genes were identified,and 11,044 genes were found to have alternatively spliced ***,we constructed a strawberry genome database(SGD)for strawberry gene homolog searching and annotation ***,the transcriptome of the receptacles and achenes of *** at four developmental stages were reanalyzed and qualified,and the expression profiles of all the genes in this annotation are also ***,this study provides an updated annotation of the *** genome,which will facilitate genomic analyses across the Rosaceae family and gene functional studies in cultivated strawberry.

关键词： straw Fragaria database

Vibrational Properties Study on Canter Fractal Structure

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Chinese Physics Letters 1995年第2期12卷 91-94页

作者： ZHANG Haifeng TANG Tao XU Wenlan li yongping Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026 Department of Physics University of Science and Technology of ChinaHefei 230026 National Infrared Laboratory Shanghai Institute of Technical PhysicsAcademia SinicaShanghai 200083

A new system of Canter fractal models was created and studied,the density of states(DOS)as well as wavefunctions of the phonon in this kind of structure were calculated and discussed,in which it shows a new kind of br... 详细信息

关键词： Fractal DOS fractal

Eyelid Basal Cell Carcinoma Arising on the Site of a Congenital Port Wine Hemangioma

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Eye Science 2012年第1期27卷 44-46页

作者： Jianhua Yan yongping li State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510060China

Purpose:Only one previous case of eyelid basal cell carcinoma arising in a facial port wine stain without previous local radiotherapy has been *** now report a second ***:A 42-year-old female patient with eyelid basal cell carcinoma developing within a facial port wine stain underwent incisional biopsy,surgical excision and ***:The patient had a mass at the inner canthus of the left eye for two *** had a left facial congenital port wine hemangioma involving the left eyelid,for which no topical treatment had been *** examination disclosed a 1.5 ×1.2 cm ulcerated skin mass with irregular borders in the medial canthal region involving the medial aspect of both upper and lower left *** biopsy revealed basal cell *** underwent surgical excision by Mohs'.technique and subsequent reconstructive eyelid *** wound healed well *** 2 years of follow up the patient showed no ***:Patients with congenital facial port wine stain may develop basal cell carcinoma,and should be regularly monitored.

关键词：葡萄酒先天性细胞基底眼睑癌血管港口