检索结果-南通市图书馆

Assimilation of All-sky Geostationary Satellite Infrared Radiances for Convection-Permitting Initialization and Prediction of Hurricane Joaquin(2015)

引用

Advances in Atmospheric Sciences 2022年第11期39卷 1859-1872页

作者： Lei ZHU Zhiyong MENG yonghui weng Fuqing ZHANG Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environmental Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science and TechnologyNanjing 210044China Laboratory for Climate and Ocean–Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China I.M.System Group(IMSG) at Environmental Modeling Center(EMC)NCEPNWSNOAACollege ParkMD 20740USA Department of Meteorology and Atmospheric Science and Center for Advanced Data Assimilation and Predictability TechniquesThe Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA

Intensity forecasting is one of the most challenging aspects of tropical cyclone(TC) forecasting. This work examines the impact of assimilating high-resolution all-sky infrared radiance observations from geostationary satellite GOES-13 on the convection-permitting initialization and prediction of Hurricane Joaquin(2015) with an ensemble Kalman filter(EnKF)based on the Weather Research and Forecasting(WRF) model. Given that almost all operational global and regional models struggled to capture Hurricane Joaquin(2015)'s intensity, this study examines the potential in improving Joaquin's prediction when assimilating all-sky infrared radiances from GOES-13's water vapor channel. It is demonstrated that, after a few 3-hour cycles assimilating all-sky radiance, the WRF model was able to forecast reasonably well Joaquin's intensity,including its rapid intensification(RI). The improvement was largely due to a more realistic initial hurricane structure with a stronger, warmer, and more compact inner-core. Ensemble forecasts were used to further explore the important physical mechanisms driving the hurricane's RI. Results showed that the RI forecasts were greatly impacted by the initial inner-core vortex structure.

关键词： all-sky infrared radiance TC intensity EnKF inner-core structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dynamics of local extreme rainfall of super Typhoon Soudelor (2015) in East China

引用

Science China Earth Sciences 2018年第5期61卷 572-594页

作者： Jinsong PAN Daigao TENG Fuqing ZHANG Lingli ZHOU Ling LUO yonghui weng Yunji ZHANG Zhejiang Meteorological Observatory Hangzhou 310021 China Department of Meteorology and Atmospheric Sciences and Center for Advanced Data Assimilation and Prediction Techniques Pennsylvania State University University Park Pennsylvania 16802 USA

The characteristics and dynamics associated with the distribution, intensity, and triggering factors of local severe precipitation in Zhejiang Province induced by Super Typhoon Soudelor(2015) were investigated using mesoscale surface observations, radar reflectivity, satellite nephograms, and the final(FNL) analyses of the Global Forecasting System(GFS) of the National Center for Environmental Prediction(NCEP). The rainfall processes during Soudelor's landfall and translation over East China could be separated into four stages based on rainfall characteristics such as distribution, intensity, and corresponding dynamics. The relatively less precipitation in the first stage resulted from interaction between the easterly wind to the north flank of this tropical cyclone(TC) and the coastal topography along the southeast of Zhejiang Province, China. With landfall of the TC in East China during the second stage, precipitation maxima occurred because of interaction between the TC's principal rainbands and the local topography from northeastern Fujian Province to southwestern Zhejiang Province. The distribution of precipitation presented significant asymmetric features in the third stage with maximal rainfall bands in the northeast quadrant of the TC when Soudelor's track turned from westward to northward as the TC decayed rapidly. Finally, during the northward to northeastward translation of the TC in the fourth stage, the interaction between a mid-latitude weather system and the northern part of the TC resulted in transfer of the maximum rainfall from the north of Zhejiang Province to the north of Jiangsu Province,which represented the end of rainfall in Zhejiang Province. Further quantitative calculations of the rainfall rate induced by the interaction between local topography and TC circulation(defined as "orographic effects") in the context of a one-dimensional simplified model showed that orographic effects were the primary factor determining the intensity of precipitation in this case,and accounted for over 50% of

关键词：降雨特征动力学华东台风地极相互作用预报系统浙江省

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

FURTHER EXPLORING THE POTENTIAL FOR ASSIMILATION OF UNMANNED AIRCRAFT OBSERVATIONS TO BENEFIT HURRICANE ANALYSES AND FORECASTS

引用

Tropical Cyclone Research and Review 2015年第2期4卷 64-70页

作者： JASON ASIPPEL FUQING ZHANG yonghui weng SCOTT ABRAUN DANIEL JCECIL IM Systems Group RockvilleMarylandUSA National Oceanographic and Atmospheric Administration Environmental Modeling CenterCollege ParkMarylandUSA Department of Meteorology The Pennsylvania State UniversityPennsylvaniaUSA Laboratory for Atmospheres NASA Goddard Space Flight CenterMarylandUSA NASA Marshall Space Flight Center AlabamaUSA

This study explores the potential of assimilating data from multiple instruments onboard high-altitude,longendurance unmanned aircraft to improve hurricane analyses and forecasts.A recent study found a signifi cant positive impact on analyses and forecasts of Hurricane Karl when an ensemble Kalman fi lter was used to assimilate data from the High-altitude Imaging Wind and Rain Airborne Profi ler(HIWRAP),a new Doppler radar onboard the NASA Global Hawk(GH)unmanned airborne system.The GH can also carry other useful instruments,including dropsondes and the Hurricane Imaging Radiometer(HIRAD),which is a new radiometer that estimates large swaths of wind speeds and rainfall at the ocean surface.The primary fi nding is that simultaneously assimilating data from HIWRAP and the other GH-compatible instruments results in further analysis and forecast improvement for Karl.The greatest improvement comes when HIWRAP,HIRAD,and dropsonde data are simultaneously assimilated.

关键词： VWP FURTHER EXPLORING THE POTENTIAL FOR ASSIMILATION OF UNMANNED AIRCRAFT OBSERVATIONS TO BENEFIT HURRICANE ANALYSES AND FORECASTS

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structural insight into the dual-antagonistic mechanism of AB928 on adenosine A_(2)receptors

引用

Science China(Life Sciences) 2024年第5期67卷 986-995页

作者： Yuan weng Xinyu Yang Qiansen Zhang Ying Chen Yueming Xu Chenyu Zhu Qiong Xie yonghui Wang Huaiyu Yang Mingyao Liu Weiqiang Lu Gaojie Song Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai 200241China Department of Medicinal Chemistry School of PharmacyFudan UniversityShanghai 201203China

The adenosine subfamily G protein-coupled receptors A_(2A)R and A_(2B)R have been identified as promising cancer immunotherapy candidates.One of the A_(2A)R/A_(2B)R dual antagonists,AB928,has progressed to a phaseⅡclinical trial to treat rectal cancer.However,the precise mechanism underlying its dual-antagonistic properties remains elusive.Herein,we report crystal structures of the A_(2A)R complexed with AB928 and a selective A_(2A)R antagonist 2-118.The structures revealed a common binding mode on A_(2A)R,wherein the ligands established extensive interactions with residues from the orthosteric and secondary pockets.In contrast,the cAMP assay and A_(2A)R and A_(2B)R molecular dynamics simulations indicated that the ligands adopted distinct binding modes on A_(2B)R.Detailed analysis of their chemical structures suggested that AB928 readily adapted to the A_(2B)R pocket,while 2-118 did not due to intrinsic differences.This disparity potentially accounted for the difference in inhibitory efficacy between A_(2B)R and A_(2A)R.This study serves as a valuable structural template for the future development of selective or dual inhibitors targeting A_(2A)R/A_(2B)R for cancer therapy.

关键词： adenosine receptor A2AR A2BR inhibitor dual-antagonism drug discovery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on variational aerosol fields over Beijing and its adjoining areas derived from Terra-MODIS and ground sunphotometer observation

引用

Chinese Science Bulletin 2003年第18期48卷 2010-2017页

作者： XU Xiangde ZHOU Xiuji weng yonghui TIAN Guoliang LIU Yujie YAN Peng DING Guoan ZHANG Yuxiang MAO Jietai QIU Hong Chinese Academy of Meteorological Sciences Beijing 100081China Institute of Remote Sensing Chinese Academy of SciencesBeijing 100101China National Satellite Meteorological Center Beijing 100081China Department of Atmospheric Sciences Peking UniversityBeijing 100871China

This paper presents a comprehensive observa-tion technique on derived aerosols data from mobile sun-photometer graph and Terra-Moderate Resolution Imaging Spectroradiometer (MODIS) observation. Research results suggest that after being treated by the variational technique with respect to sunphotometer observations, the Terra- MODIS remote sensing aerosol data are remarkably im-proved, thus for the first time revealing features of the influ-ence of aerosols and pollution emissions of Beijing and its adjoining areas (Hebei, Shandong, etc. provinces). The re-gional impact features of aerosols are related with the pe-ripheral U-shape topography of Beijing. Analyses with Hy-brid Single Particle Lagrangian Integrated Trajectory model (HYSPLIT-4) and meteorological data in the case studied confirm the pollutants diffusion process along the trajectory from the sources in the south-west region, and the regional aerosol impact features.

关键词： MODIS sunphotometer variationl correction optical depth.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

北京地区PM_(10)浓度空间分布特征的综合变分分析

引用

应用气象学报 2007年第2期18卷 165-172页

作者：程兴宏徐祥德陈尊裕丁国安李成才翁永辉中国气象科学研究院 Department of Civil and Structural Engineering Hong Kong Polytechnic UniversityHung HomHong Kong 北京大学大气科学系北京100871

利用2003年10月北京地区PM10浓度流动观测资料和同期MODIS AOD(Aerosol Optical Depth)高分辨率遥感资料,采用卫星遥感-地面观测变分订正处理方法,综合分析了北京地区PM10浓度的空间分布特征以及机动车排放的影响效应。动态观测试验结... 详细信息

利用2003年10月北京地区PM10浓度流动观测资料和同期MODIS AOD(Aerosol Optical Depth)高分辨率遥感资料,采用卫星遥感-地面观测变分订正处理方法,综合分析了北京地区PM10浓度的空间分布特征以及机动车排放的影响效应。动态观测试验结果表明:北京城区大部分为轻污染区,北京近郊区PM10浓度高值区沿环路呈环状分布,其中北京西南部、南部和东北部污染较严重,北京城郊街区PM10的空间分布受机动车排放的影响较大。MODIS卫星遥感资料分析表明:北京城区及近郊区AOD值较远郊区高得多,AOD空间分布场中存在虚假高值区,AOD非均匀分布特征不明显。采取点-面结合综合观测研究思路,运用卫星遥感-地面观测综合变分分析方法,可以取得客观订正的显著效果。经地面实测PM10浓度变分订正后的AOD变分场可以较高分辨率信息描述北京地区AOD的非均匀分布特征,弥补地面PM10浓度观测的缺陷。

关键词：机动车排放 PM10 气溶胶光学厚度变分订正

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

应用TOVS资料变分分析技术增加青藏高原地区摸式初始场信息

引用

气象学报 2000年第6期58卷 679-691页

作者：翁永辉徐祥德柏晶瑜董超华中国气象科学研究院北京100081 国家气象局卫星气象中心北京100081

首次在测站稀少的高原地区引入经变分技术处理的 TOVS卫星资料 ,通过动力诊断探讨了解决高原地区测站少、数值预报模式初始场信息误差大的技术关键问题 ,提出了采用TOVS反演资料在高原地区增加模式初始场信息的构思 ,并应用变分法处理 T... 详细信息

首次在测站稀少的高原地区引入经变分技术处理的 TOVS卫星资料 ,通过动力诊断探讨了解决高原地区测站少、数值预报模式初始场信息误差大的技术关键问题 ,提出了采用TOVS反演资料在高原地区增加模式初始场信息的构思 ,并应用变分法处理 TOVS反演资料 ,显著地提高了高原初始场信息的可靠性 ;并从动力诊断分析角度 ,进一步证实了 TOVS反演资料的应用有利于提高高原动力系统特征的描述能力。

关键词： TOVS反演资料变分法青藏高原初始场数值预报

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

杜鹃花的文化意蕴及其在园林绿化中的应用

引用

中国农学通报 2007年第9期23卷 376-380页

作者：张永辉姜卫兵翁忙玲南京农业大学园艺学院江苏南京210095

杜鹃原产中国,家族庞大,种类繁多,具有极高的观赏价值,是中国十大传统名花之一,自古以来被誉为花中"西施"。本文依据相关文献,归纳了中国观赏价值较高的杜鹃品种的生态习性和观花期,阐述了杜鹃的文史内涵和观赏特征,提出了在园林绿化中... 详细信息

杜鹃原产中国,家族庞大,种类繁多,具有极高的观赏价值,是中国十大传统名花之一,自古以来被誉为花中"西施"。本文依据相关文献,归纳了中国观赏价值较高的杜鹃品种的生态习性和观花期,阐述了杜鹃的文史内涵和观赏特征,提出了在园林绿化中的应用途径和主要配置方式。

关键词：杜鹃文化内涵园林绿化应用

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

裴李岗遗址出土石磨盘表面淀粉粒的鉴定与分析

引用

第四纪研究 2011年第5期31卷 891-899页

作者：张永辉翁屹姚凌张居中周昱君方方崔炜中国科学技术大学科技史与科技考古系合肥230026

文章论述了从河南新郑裴李岗遗址(8500～7000aB.P.)出土的8件石磨盘表而提取的1000多颗淀粉粒的研究情况,根据其形态特征分析,其来源至少可分为栎属(Quercus spp.)果实(橡子)、小麦族(Triticeae Dumort.)、粟(Setaria italica)或黍(Pani... 详细信息

文章论述了从河南新郑裴李岗遗址(8500～7000aB.P.)出土的8件石磨盘表而提取的1000多颗淀粉粒的研究情况,根据其形态特征分析,其来源至少可分为栎属(Quercus spp.)果实(橡子)、小麦族(Triticeae Dumort.)、粟(Setaria italica)或黍(Panicum miliaceum)或薏苡属(Coix spp.)、根茎类四大类;此外,还有一部分淀粉粒无法鉴定。研究表明:裴李岗遗址石磨盘的功能具有多样性;橡子可能是当时先民的重要食物来源,其次是小麦族、粟或黍或薏苡属。本实验结果可为中国农业起源研究提供一些新思路和新线索。同时,丰的植物种类及组合也与当时温暖湿润的气候环境相吻合,从另一个角度为环境考古研究提供了一批新资料。

关键词：淀粉粒分析植物性食物石磨盘裴李岗遗址

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

五倍子单宁酸同步提取-酶解工艺的研究

引用

食品科技 2020年第7期45卷 235-241页

作者：杨秋明茹毅翁惠芬肖琼肖安风张永辉集美大学食品与生物工程学院福建厦门361021 福建省食品微生物与酶工程重点实验室福建厦门361021 福建省海洋功能食品工程技术研究中心福建厦门361021

单宁酸是一种较强的蛋白质沉淀剂。在酶法制备没食子酸的过程中,高浓度单宁酸会严重抑制单宁酶活性,因此很难直接利用单宁酸进行没食子酸的工业生产。为了解除单宁酸对单宁酶的抑制作用,研究建立了五倍子单宁酸同步提取-酶解工艺,反应90... 详细信息

单宁酸是一种较强的蛋白质沉淀剂。在酶法制备没食子酸的过程中,高浓度单宁酸会严重抑制单宁酶活性,因此很难直接利用单宁酸进行没食子酸的工业生产。为了解除单宁酸对单宁酶的抑制作用,研究建立了五倍子单宁酸同步提取-酶解工艺,反应90 min,同步提取-酶解工艺没食子酸浓度达到13.9 g/L,没食子酸生产效率明显高于同步提取-酸解工艺和五倍子单宁酸先提取后酶解工艺。对五倍子单宁酸同步提取-酶解工艺进行优化,结果表明在料液比1:50、加酶量32 U/mL、pH6~7、温度50℃和提取时间75 min时,没食子酸产量和得率最大,分别达到15.4 g/L和76.8%。在最优条件下进行多次投料试验,没食子酸最终产量可提高至34.0 g/L。

关键词：五倍子单宁酸单宁酶没食子酸同步提取-酶解工艺

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：