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Environmental Conditions Conducive to the Formation of Multiple Tropical Cyclones over the Western North Pacific

Advances in Atmospheric Sciences 2024年第10期41卷 2027-2042页

作者： Yining GU Ruifen zhan Xiaomeng LI Department of Atmospheric and Oceanic Sciences/Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China CMA-FDU Joint Laboratory of Marine Meteorology Shanghai 200030China Institute of Desert and Meteorology China Meteorological AdministrationUrumqi 830002China

There is limited understanding regarding the formation of multiple tropical cyclones(MTCs).This study explores the environmental conditions conducive to MTC formation by objectively determining the atmospheric circulation patterns favorable for MTC formation over the western North *** on 199 MTC events occurring from June to October 1980–2020,four distinct circulation patterns are identified:the monsoon trough(MT)pattern,accounting for 40.3%of occurrences,the confluence zone(CON)pattern at 26.2%,the easterly wave(EW)pattern at 17.8%,and the monsoon gyre(MG)pattern at 15.7%.The MT pattern mainly arises from the interaction between the subtropical high and the monsoon trough,with MTCs forming along the monsoon trough and its *** CON pattern is affected by the subtropical high,the South Asian high,and the monsoon trough,with MTCs emerging at the confluence zone where the prevailing southwesterly and southeasterly flows *** EW pattern is dominated by easterly flows,with MTCs developing along the easterly wave *** in the MG pattern arise within a monsoon vortex characterized by strong southwesterly flows.A quantitative analysis further indicates that MTC formation in the MT pattern is primarily governed by mid-level vertical velocity and low-level vorticity,while mid-level humidity and vertical velocity are significantly important in the other *** meridional shear and convergence of zonal winds are essential in converting barotropic energy from the basic flows to disturbance kinetic energy,acting as the primary source for eddy kinetic energy growth.

关键词： multiple tropical cyclones western North Pacific circulation pattern monsoon trough barotropic energy conversion

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A positively charged silver nanowire membrane for rapid on-site swabbing extraction and detection of trace inorganic explosives using a portable Raman spectrometer

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Nano Research 2016年第8期9卷 2487-2497页

作者： Yu-e Shi Wenshou Wang Jinhua zhan National Engineering Research Center for Colloidal Materials and Key Laboratory of Colloid and Interface Chemistry of Ministry ofEducation Department of Chemistry Shandong University Jinan 250100 China

The sensitive and on-site detection of inorganic explosives has raised serious concerns regarding public safety. However, high stability and non-volatility features currently limit their rapid on-site detection. Surface-enhanced Raman spectroscopy （SERS） is emerging as a powerful technique for the trace-level detection of different molecules. Plasmonic Ag nanowires were produced by a hydrothermal synthesis method using polyvinylpyrrolidone （PVP） as a negatively charged stabilizer. Here, we report a rapid detection method for inorganic explosives based on a simple surface swab with a positively charged diethyldithiocarbamate-modified Ag nanowire membrane coupled with SERS. This membrane, serving as an excellent SERS substrate with high uniformity, stability, and reusability, can capture both typical oxidizers in inorganic explosives and organic nitro-explosives, via electrostatic interaction. The detection level of perchlorates （ClO4-）, chlorates （ClO3-）, nitrates （NO3）-, picric acid, and 2,4- dinitrophenol is as high as 2.0, 1.7, 0.1, 45.8, and 36.6 ng, respectively. In addition, simulated typical inorganic explosives such as black powders, firecrackers, and match heads could also be detected. We believe that this membrane represents an attractive alternative for rapid on-site detection of inorganic explosives with high efficiency.

关键词： Ag explosives nanowire surface-enhanced Ramanscattering on-site detection

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An iterative algorithm for analysis of coupled structural-acoustic systems subject to random excitations

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Acta Mechanica Sinica 2012年第2期28卷 458-467页

作者： Guo-Zhong Zhao Gang Chen zhan Kang State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology116024 DalianChina

This paper analyzes the random response of structural-acoustic coupled systems. Most existing works on coupled structural-acoustic analysis are limited to systems under deterministic excitations due to high computational cost required by a random response analysis. To reduce the computational burden involved in the coupled random analysis, an iterative procedure based on the Pseudo excitation method has been developed. It is found that this algorithm has an overwhelming advantage in computing efficiency over traditional methods, as demonstrated by some numerical examples given in this paper.

关键词： Random excitation Coupled structural-acoustic systems Pseudo excitation method

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KINETIC STUDY ON FORMATION OF BULK GLASS STATE Zr_52.5Ni_14.6Al₁₀Cu_17.9Ti₅ ALLOY

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中国有色金属学会会刊：英文版 1999年第2期9卷 69-73页

作者： He, Guo Bian, zhan Chen, Guoliang Univ of Science and Technology Beijing Beijing China

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１ＩＮＴＲＯＤＵＣＴＩＯＮＭｏｓｔｍｅｔａｌｉｃａｌｏｙｓｕｓｕａｌｙｈａｖｅａｌｏｗｅｒｇｌａｓｔｒａｎｓｉｔｉｏｎｔｅｍｐｅｒａｔｕｒｅＴｇ，ｔｈｅｉｒｇｌａｓｓｔａｔｅａｒｅｆｏｒｍｅｄｉｎｔｈｅｃｏｎｄｉｔｉｏｎｏｆｆａｓｔｅｒｃｏｏｌｉｎｇ...

关键词： Zrbased glass state alloybulk glass state alloymelt injectioncritical cooling rate

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Morphology and molecular phylogeny of three black corals(Antipatharia,Schizopathidae)from seamounts in the Western Pacific Ocean,with description of a new species

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Journal of Oceanology and Limnology 2021年第5期39卷 1740-1757页

作者： Ting LÜ Zifeng zhan Kuidong XU Laboratory of Marine Organism Taxonomy and Phylogeny Shandong Province Key Laboratory of Experimental Marine BiologyInstitute of OceanologyCenter for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Pilot NationalLaboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

Three deep-sea black corals belonging to the family Schizopathidae,are reported from two seamounts on the Caroline Ridge in the tropical Western Pacific:Umbellapathes parva *** depth of 1488-1766 m,Telopathes *** MacIsaac&Best,2013 with depth of 937-1016 m,and Stauropathes ***(Roule,1905)with depth of 942-1353 *** latter two species are the first records in the Western Pacific *** *** characterized by monopodial corallum,relatively long unpinnulated stalk with complex pinnulated branche s developing from the lowermost primary pinnules and small spine *** differs from two known congeners by much smaller spine s and the present of secondary *** MacIsaac&Best,2013 has sparsely branched corallum,relatively long and simple pinnules arranged in subopposite or alternate ***(Roule,1905)is characterized by the corallum with almost planar pinnulated branches,and pinnules arranged in subopposite *** results indicate that the corallum size and shape are variable in conspecific specimens particularly those at different growth *** contrast,the size of the polypar spines as well as the abpolypar spines have little variation and can be served as a main differing feature for schizopathid *** phylogenetic analyses using nuclear internal transcribed spacer region(spanning partial 18 S rDNA,ITS 1,5.8 S,ITS2,and partial 28 S rDNA)and two mitochondrial fragments cox3-IGR-coxl(COI)and trnW-IGR-nad2(NAD2)showed Telopathes,Stau ropathes,and Bathypathes had close relationships,and Umbellapathes formed a sister clade with Alternatipathes.

关键词： Anthozoa black coral new species seamount taxonomy Western Pacific

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Rationally designed synthetic peptide as versatile calibrant to improve the accuracy of protein sequence analysis using MALDI mass spectrometry

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Chinese Chemical Letters 2024年第3期35卷 214-220页

作者： Lingpeng zhan Yanyi Huang Guanbo Wang Institute for Cell Analysis Shenzhen Bay LaboratoryShenzhen 518132China Biomedical Pioneering Innovation Center Peking UniversityBeijing 100871China

Matrix-assisted laser desorption/ionization(MALDI)mass spectrometry(MS)plays an indispensable role in analyzing protein covalent *** reliable identification of amino acid residues and modifications relies on the mass accuracy,which is highly dependent on ***,the accuracy provided by the currently available calibrants still needs further improvement in terms of compatibility with multiple tandem MS modes or ion polarity modes,calibratable range,and minimizing suppression of and interference with analyte *** aiming at developing a versatile calibrant to solve these problem,we designed a synthetic peptide format of calibrant R_x(GDP_n)_m(referred to as“Gly-Asp-Pro,GDP”)according to the chemical natures of amino acids and polypeptide fragmentation rules in tandem *** four types of amino acid residues selected and arranged through rational designs,a GDP peptide produces highly regulated fragments that give rise to evenly spaced signals in each tandem MS mode and is compatible with both positive and negative ion *** internal calibration,its regulated fragmentation pattern minimizes interference with analyte signals,and using a single peptide as the input minimizes suppression of the analyte *** demonstrated by analyses of proteins including monoclonal antibody and Aβ-42,these features allowed significant increase of the mass accuracy and precision,which improved sequence coverage and sequence resolution in sequence analyses(including de novo sequencing).This rational design strategy may also inspire further development of synthetic calibrants that benefit structural analysis of biomolecules.

关键词： Biomolecule design Synthetic peptide Protein sequencing Covalent structure De novo sequencing Mass spectrometry Gas-phase fragmentation

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3 = 1 + 2: how the divide conquered de novo protein structure prediction and what is next?

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National Science Review 2023年第12期10卷 60-65页

作者： Yaoqi Zhou Thomas Litfin Jian zhan Institute of Systems and Physical Biology Shenzhen Bay Laboratory Institute for Glycomics Griffith University

Protein structure prediction has been a challenging problem for>60 years. Its progress has been considered incremental for the past 20 years until leaps were made by Alpha Fold that seemed to suddenly reach experimental accuracy. We argue that this unexpected success in 3D structure prediction was foreshadowed by prior advances in predicting 1D backbone structures and 2D side-chain distance maps in continuous angle and distance space as well as the embedding of these 1D and 2D features for end-to-end learning.

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TR PIV Experimental Investigation on Bypass Transition Induced by a Cylinder Wake

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Chinese Physics Letters 2011年第5期28卷 172-175页

作者： TANG zhan-Qi JIANG Nan Department of Mechanics Tianjin UniversityTianjin 300072 Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin UniversityTianjin 300372

The process of laminar to turbulent transition induced by a cylinder wake is studied by time-resolved(TR)particle image velocimetry(PIV)in a water *** combination of multi-scale local-averaged structure function analysis with criteria is used to identify the generation of secondary transverse vortex structure andto track its evolution along the *** the beginning of transition,with the decent of cylinder wake vortex,the secondary vortex structure is induced near the *** the secondary vortex moves dovnstream,it is induced to lift up by the wake vortex,meanwhile they are diffused and *** to the method of spatial conditional average,a low-speedhump is found in the near-wallregion along the bypass transition zone,accompanied by a low-speed region in the free stream occupied by the vake *** further downstream,the hump in the near-wall region becomes more and more *** the later stage of transition zone,hairpin vortex can be seen by conditional-averaged low-pass filtered *** hairpin head is almost vertical to the wall with an inclination angle of about 90°,which is attributed to the additional lift-up behavior induced by wake *** can be concluded that in the process of bypass transition,the wake vortex would not only induce the secondary vortex but also leaven its growth and evolution,resulting in the robust and rapidly growing hairpin vortex.

关键词： vortex cylinder averaged

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Paragorgia papillata ***.,a new bubblegum coral(Octocorallia:Paragorgiidae)from a seamount in the tropical Western Pacific

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Journal of Oceanology and Limnology 2021年第5期39卷 1758-1766页

作者： Yang LI Zifeng zhan Kuidong XU Laboratory of Marine Organism Taxonomy and Phylogeny Shandong ProvinceKey Laboratory of Experimental Marine BiologyInstitute of OceanologyCenter for Ocean Mega-ScienceChineseAcademy of SciencesQingdao 266071China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China University of Chinese Academy of Sciences Beijing 100049China

A new species of bubblegum coral,Paragorgia papillata ***.,discovered from a seamount located on the Caroline Ridge at the water depth of 858 m,is studied using morphological and molecular *** new gorgonian is white-colored,uniplanar with prominent autozooids,and measures about670-mm high and 690-mm *** genetic distance and phylogenetic analysis showed that *** *** closely related to *** Bayer,1993,but the former differs morphologically from the latter by its prominent calyces(diameter 2.0-4.0 mm and height 1.5-3.0 mm *** diameter and height about 1 mm),white cortex(***),regular 8-radiates in surface cortex(*** 8-radiate derived globular radiates)and highly ornate medullar spindles(length 185-400μm *** more than 150μm).*** *** the third known white-colored species of the genus,and the fifth species found in the tropical Western Pacific.

关键词： Paragorgia gorgonian Scleraxonia Cnidaria new species seamount

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Cobalt-Catalyzed Difunctionalization of Styrenes via Ligand Relay Catalysis

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Chinese Journal of Chemistry 2023年第24期41卷 3633-3638页

作者： Bingcheng Wang Yufeng Sun zhan Lu Department of Chemistry Zhejiang UniversityHangzhouZhejiang310058 China College of Chemistry Zhengzhou UniversityZhengzhouHenan450001 China

Here,we report a cobalt-catalyzed sequential dehydrogenative Heck silylation/hydroamination of styrenes with hydrosilane and diazo compound to access 1-amino-2-silyl compounds with excellent *** difunctionalization reaction could undergo smoothly using 1 mol%catalyst loading with good functional group *** only di-and tri-substituted hydrosilanes,but also alkoxysilane is suitable,which does explore the scope of the family of 1-amino-2-silyl *** ligand relay phenomenon between neutral tridentate NNN ligand and anionic NNN ligand is observed for the first time via absorption spectral analysis in this one-pot,two-step *** primary mechanism has been proposed based on the control experiments.

关键词： Ligand relay catalysis Difunctionalization Styrene Alkoxysilane Hydroamination Diazo compounds

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