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The Contribution of United States Aircraft Reconnaissance Data to the China Meteorological Administration Tropical Cyclone Intensity Data:An Evaluation of Homogeneity

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Advances in Atmospheric Sciences 2024年第4期41卷 639-654页

作者： ming ying Xiaoqin LU Shanghai Typhoon Institute China Meteorological AdministrationShanghai 200030China

This paper investigates the homogeneity of United States aircraft reconnaissance data and the impact of these data on the homogeneity of the tropical cyclone(TC)best track data for the seasons 1949-1987 generated by the China Meteorological Administration(CMA).The evaluation of the reconnaissance data shows that the minimum central sea level pressure(MCP)data are relatively homogeneous,whereas the maximum sustained wind(MSW)data show both overestimations and spurious abrupt *** comparisons suggest that both the reconnaissance MCP and MSW were well incorporated into the CMA TC best track *** no spurious abrupt changes were evident in the reconnaissance-related best track MCP data,two spurious changepoints were identified in the remainder of the best-track MCP ***,the influence of the reconnaissance MSWs seems to extend to the best track MSWs unrelated to reconnaissance,which might reflect the optimistic confidence in making higher estimates due to the overestimated extreme wind“observations”.In addition,the overestimation of either the reconnaissance MSWs or the best track MSWs was greater during the early decades compared to later decades,which reflects the important influence of reconnaissance data on the CMA TC best track *** wind-pressure relationship(WPR)used in the CMA TC best track dataset is also evaluated and is found to overestimate the MSW,which may lead to inhomogeneity within the dataset between the aircraft reconnaissance era and the satellite era.

关键词： tropical cyclone intensity homogeneity best track aircraft reconnaissance

Research progress on seismic imaging technology

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Petroleum Science 2022年第1期19卷 128-146页

作者： Zhen-Chun Li ying-ming Qu School of Geosciences China University of PetroleumQingdaoShandong266580China Shandong Provincial Key Laboratory of Deep Oil&Gas China University of PetroleumQingdaoShandong266580China

High-precision seismic imaging is the core task of seismic exploration,guaranteeing the accuracy of geophysical and geological *** the development of seismic exploration,the targets become more and more *** on complex media such as subsalt,small-scale,steeply dipping and surface topography structures brings a great challenge to imaging ***,the seismic imaging methods range from stacking-to migration-to inversion-based imaging,and the imaging accuracy is becoming increasingly *** review paper includes:summarizing the development of the seismic imaging;overviewing the principles of three typical imaging methods,including common reflection surface(CRS)stack,migration-based Gaussian-beam migration(GBM)and reverse-time migration(RTM),and inversion-based least-squares reverse-time migration(LSRTM);analyzing the imaging capability of GBM,RTM and LSRTM to the special structures on three typical models and a land data set;outlooking the future perspectives of imaging *** main challenge of seismic imaging is to produce high-precision images for low-quality data,extremely deep reservoirs,and dual-complex structures.

关键词： Common reflection surface stack Gaussian-beam migration Reverse-time migration Least-squares reverse-time migration

Decision framework of group consensus with hesitant fuzzy linguistic preference relations

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CAAI Transactions on Intelligence Technology 2020年第3期5卷 157-164页

作者： Yang Lin ying-ming Wang School of Economics Fujian Normal University350117 FuzhouPeople’s Republic of China Decision Science Institute Fuzhou University350116 FuzhouPeople’s Republic of China

Group decision making typically requires eliciting and coordinating the preferences of group *** this study,the authors develop an overall framework of group consensus in context of hesitant fuzzy linguistic preference relations(HFLPRs).A new notion of distance measure between two HFLPRs is defined,based on which a consensual framework consists of two mechanisms,the automatic consensus reaching and the interactive consensus reaching is ***,they,respectively,design two algorithms to implement these ***,a group decision problem of green supplier selection is provided to exemplify and verify both of the proposed methods,and a comparative analysis with some related approaches is performed.

关键词： verify typically notion

Measurements of spectral lines observed with Hinode/EIS as implications for coronal heating

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Research in Astronomy and Astrophysics 2009年第7期9卷 829-840页

作者： ying Li ming-De Ding Department of Astronomy Nanjing University Nanjing 210093 China

We have measured the line widths and nonthermal velocities in 12 solar regions using high resolution EUV data taken by Hinode/EIS. We find that there exists a positive correlation between the intensity and nonthermal velocity for the Fe xII emission line as well as some other lines. The correlation coefficients decrease from the disk center to the limb. However, the nonthermal velocities of a particular spectral line do not vary much in different regions, so they are considered isotropic. In particular, we find that for a coronal loop structure, the largest widths and nonthermal velocities occur at the footpoints, where outflows appear. Based on these observational results, we discuss several physical processes responsible for coronal heating.

关键词： line: profiles - Sun: corona - Sun: UV radiation

Scientific articles recommendation with topic regression and relational matrix factorization

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第11期15卷 984-998页

作者： ming YANG ying-ming LI Zhongfei(Mark) ZHANG Department of Information Science and Electronic Engineering Zhejiang University

In this paper we study the problem of recommending scientific articles to users in an online community with a new perspective of considering topic regression modeling and articles relational structure analysis simultaneously. First, we present a novel topic regression model, the topic regression matrix factorization （tr-MF）, to solve the problem. The main idea of tr-MF lies in extending the matrix factorization with a probabilistic topic modeling. In particular, tr-MF introduces a regression model to regularize user factors through probabilistic topic modeling under the basic hypothesis that users share similar preferences if they rate similar sets of items. Consequently, tr-MF provides interpretable latent factors for users and items, and makes accurate predictions for community users. To incorporate the relational structure into the framework of tr-MF, we introduce relational matrix factorization. Through combining tr-MF with the relational matrix femtorization, we propose the topic regression collective matrix factorization （tr-CMF） model. In addition, we also present the collaborative topic regression model with relational matrix factorization （CTR-RMF） model, which combines the existing collaborative topic regression （CTR） model and relational matrix factorization （RMF）. From this point of view, CTR-RMF can be considered as an appropriate baseline for tr-CMF. Further, we demonstrate the efficacy of the proposed models on a large subset of the data from CiteULike, a bibliography sharing service dataset. The proposed models outperform the state-of-the-art matrix factorization models with a significant margin. Specifically, the proposed models are effective in making predictions for users with only few ratings or even no ratings, and support tasks that are specific to a certain field, neither of which has been addressed in the existing literature.

关键词： Matrix factorization Probabilistic topic modeling Relational matrix factorization Rccommender system

Uncertainty in Tropical Cyclone Intensity Predictions due to Uncertainty in Initial Conditions

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Advances in Atmospheric Sciences 2020年第3期37卷 278-290页

作者： Chenxi WANG Zhihua ZENG ming ying Shanghai Typhoon Institute China Meteorological Administration

Focusing on the role of initial condition uncertainty,we use WRF initial perturbation ensemble forecasts to investigate the uncertainty in intensity forecasts of Tropical Cyclone(TC)Rammasun(1409),which is the strongest TC to have made landfall in China during the past 50 *** results indicate that initial condition uncertainty leads to TC forecast uncertainty,particularly for TC *** uncertainty increases with forecast time,with a more rapid and significant increase after 24 *** predicted TC develops slowly before 24 h,and at this stage the TC in the member forecasting the strongest final TC is not the strongest among all ***,after 24 h,the TC in this member strengthens much more than that the TC in other *** variations in convective instability,precipitation,surface upward heat flux,and surface upward water vapor flux show similar characteristics to the variation in TC intensity,and there is a strong correlation between TC intensity and both the surface upward heat flux and the surface upward water vapor *** initial condition differences that result in the maximum intensity difference are smaller than the errors in the analysis *** in initial humidity,and to a lesser extent initial temperature differences,at the surface and at lower heights are the key factors leading to differences in the forecasted TC *** differences in initial humidity and temperature relate to both the overall values and distribution of these parameters.

关键词： uncertainty tropical cyclone intensity initial conditions

Long Time Behavior of the Fokker-Planck-Boltzmann Equation

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Acta Mathematicae Applicatae Sinica 2014年第2期30卷 533-554页

作者： ming-ying ZHONG Hai-liang LI Department of Mathematical and Information Sciences Guangxi University Department of Mathematics Capital Normal University

This paper is devoted to the existence and long time behavior of the global classical solution to Fokker-Planck-Boltzmann equation with initial data near the absolute Maxwellian.

关键词： Fokker-Planck-Boltzmann equation global existence long time behavior

Molecular recognition and biological application of modified β-cyclodextrins

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Science China Chemistry 2019年第5期62卷 549-560页

作者： ying-ming Zhang Qiao-Yan Xu Yu Liu College of Chemistry State Key Laboratory of Elemento-Organic ChemistryNankai University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The molecular recognition based on cyclodextrins(CDs) has become a focus of interest in modern supramolecular *** are known to encapsulate various ions and organic/inorganic molecules in their hydrophobic cavities and form stable inclusion complexes through cooperative noncovalent interactions. During the past few decades, a large variety of modified CDs have been elaborately designed and synthesized, which significantly promotes our molecular-level understanding of the structure–function relationship in many supramolecular systems. Through the accurate analysis on the molecular binding behaviors, one can create a library of CD-based nanoassemblies with controlled physicochemical properties. In this review, we will focus on the stability constant-directed molecular recognition and the biological activities of β-CDs toward some representative bioactive substrates, including metal ions, steroids, porphyrins, amino acids and oligopeptides, as well as drug molecules, with the final goal of promoting their practical applications in the biomedical field.

关键词： Host-guest chemistry molecular recognition cyclodextrin biological function

Synthesis and Crystal Structure of Bis(cyclopentadienyl) Ytterbium Complex Supported by β-Diketiminate

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Chinese Journal of Structural Chemistry 2006年第2期25卷 139-142页

作者： XUE ming-Qiang YAO ying-ming SHEN Qi YU Kai-Bei College of Chemistry and Chemical Engineering Suzhou University Suzhou 215006 China Chengdu Institute of Organic Chemistry The Chinese Academy of Sciences Chengdu 610041 China

Treatment of the β-diketiminate-supported ytterbium dichloride LYbCl2（THF）2 1 （L = N,N＇-bis（2,6-dimethylphenyl）-2,4-pentanediiminate） with 2 equiv of C5H5Na gave rise to the title complex LYb（C5H5）2 2 （C31H35N2Yb, Mr = 608.65）, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P2 1/n with a = 14.417（2）, b = 10.432（2）, c = 18.040（4） ,A°, β= 95.73（2）°, V= 2699.6（9） ,A°, Dc = 1.498 g/cm^3, Z = 4, 2（MoKa） = 0.71073 ,A°,μ = 3.485 mm^-1, F（000） = 1220, the final R = 0.0304 and wR = 0.0703 for 3962 observed reflections with I 〉 2σ（I）. In the molecular structure of the title complex, the central metal atom Yb is eight-coordinated by two cyclopentadienyl groups and two nitrogen atoms of ,β- diketiminate group to form a distorted tetrahedral geometry.

关键词： ytterbium β-diketiminate ligand crystal structure synthesis