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Assimilation of atmospheric infrared sounder radiances with WRF-GSI for improving typhoon forecast

Frontiers of Earth Science 2018年第3期12卷 457-467页

作者： Yan-An LIU Zhibin SUN Maosi CHEN hung-lung allen huang Wei GAO Key Laboratory of Geographic Information Science (Ministry of Education) East China Normal University Shanghai 200241 China School of Geographic Sciences East China Normal University Shanghai 200241 China ECNU-CSU Joint Research Institute for New Energy and the Environment East China Normal University Shanghai 200062 China Joint Laboratory for Environmental Remote Sensing and Data Assimilation East China Normal University Shanghai 200241 China Natural Resource Ecology Laboratory Colorado State University Fort Collins CO 80523 United States Cooperative Institute for Meteorological Satellite Studies University of Wisconsin-Madison Madison WI 53706 United States

The Atmospheric Infrared Sounder （AIRS） can provide the profile information on atmospheric temperature and humidity in high vertical resolution. The assimilation of its radiances has been proven to improve the Numerical Weather Prediction （NWP） in global models. In this study, regional assimilation of AIRS radiances was carried out in a community assimilation system, using Gridpoint Statistical Interpolation （GSI） coupled with the Weather Research and Forecasting （WRY） model. The AIRS channel selection, quality control, and radiances bias correction were examined and illustrated for optimized assimilation. The bias correction scheme in the regional model showed that corrections on most of the channels produce satisfactory results except for several land surface channels. The assimilation and forecast experiments were carried out for three typhoon cases （Saola, Damrey, and Haikui in 2012） with and without including AIRS radiances. Results show that the assimilation of AIRS radiances into the WRF/GSI model improves both the typhoon track and intensity in a 72-hour forecast.

关键词： AIRS WRF/GSI model radiance assimilation typhoon forecast

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Analysis of spatio-temporal variability of aerosol optical depth with empirical orthogonal functions in the Changjiang River Delta, China

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Frontiers of Earth Science 2015年第1期9卷 1-12页

作者： Tianyong ZHAI Qing ZHAO Wei GAO Runhe SHI Weining XIANG hung-lung allen huang Chao ZHANG Key Laboratory of qeographic Information Science (Minislay of Education) East China Normal University Shanghai 200062 China Joint Laboratory for Environmental Remote Sensing and Data Assimilation ECNU&CEODE Shanghai 200062 China Colorado State University Natural Resource Ecology Laboratory Fort Collins Colorado 80521 USA Shanghai Key Laboratory for Urban Ecology and Sustainability East China Normal University Shanghai 200062 China University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies (CIMSS) Madison Wisconsin 53706 USA

This work aims to analyze the spatial and temporal variability of aerosol optical depth （AOD） from 2000 to 2012 in the Changjiang River Delta （CRD）, China. US Terra satellite moderate resolution imaging spectroradiometer （MODIS） AOD and Angstrom exponent （a） data constitute a baseline, with the empirical orthogonal functions （EOFs） method used as a major data analysis method. The results show that the maximum value of AOD observed in June is 1.00±0.12, and the lowest value detected in December is 0.40±0.05. AOD in spring and summer is higher than in autumn and winter. On the other hand, the a-value is lowest in spring （0.86±0.10）, which are affected by coarse particles. High a-value appears in summer （1.32±0.05）, which indicate that aerosols are dominated by fine particles. The spatial distribution of AOD has a close relationship with terrain and population density. Generally, high AODs are distributed in the lowlying plains, and low AODs in the mountainous areas. The spatial and temporal patterns of seasonal AODs show that the first three EOF modes cumulatively account for 77% of the total variance. The first mode that explains 67% of the total variance shows the primary spatial distribution of aerosols, i.e., high AODs are distributed in the northern areas and low AODs in the southern areas. The second mode （7%） shows that the monsoon climate probably plays an important role in modifying the distribution of aerosols, especially in summer and winter. In the third mode （3%）, this distribution of aerosols usually occurs in spring and winter when the prevailing northwestern or western winds could bring aerosol particles from the inland areas into thecentral regions of the CRD.

关键词： AOD MODIS EOFs Angstrom exponent,Changjiang River Delta

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Analysis of air quality variability in Shanghai using AOD and API data in the recent decade

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Frontiers of Earth Science 2013年第2期7卷 159-168页

作者： Qing ZHAO Wei GAO Weining XIANG Runhe SHI Chaoshun LIU Tianyong ZHAI hung-lung allen huang Liam E. GUMLEY Kathleen STRABALA Key Laboratory of Geographic Information Science (Ministry of Education) East China Normal University Shanghai 200062 China Joint Laboratory for Environmental Remote Sensing and Data Assimilation ECNU&CEODE Colorado State University Shanghai 200062 China Colorado State University Natural Resource Ecology Laboratory Fort Collins Colorado 80521 USA Shanghai Key Laboratory for Urban Ecology and Sustainability East China Normal University Shanghai 200062 China University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies (CIMSS) Madison Wisconsin 53706 USA

We use the aerosol optical depth （AOD） measured by the moderate resolution imaging spectrometer （MOD1S） onboard the Terra satellite, air pollution index （API） daily data measured by the Shanghai Environmental Monitoring Center （SEMC）, and the ensemble empirical mode decomposition （EEMD） method to analyze the air quality variability in Shanghai in the recent decade. The results indicate that a trend with amplitude of 1.0 is a dominant component for the AOD variability in the recent decade. During the World Expo 2010, the average AOD level reduced 30% in comparison to the long-term trend. Two dominant annual components decreased 80% and 100%. This implies that the air quality in Shanghai was remarkably improved, and environmental initiatives and comprehensive actions for effective. AOD and API reducing air pollution are variability analysis results indicate that semi-annual and annual signals are dominant components implying that the monsoon weather is a dominant factor in modulating the AOD and API variability. The variability of AOD and API in selected districts located in both downtown and suburban areas shows similar trends; i.e., in 2000 the AOD began a monotonic increase, reached the maxima around 2006, then monotonically decreased to 2011 and from around 2006 the API started to decrease till 2011. This indicates that the air quality in the entire Shanghai area, whether urban or suburban areas, has remarkably been improved. The AOD improved degrees （IDS） in all the selected districts are （8.6±1.9）%, and API IDS are （9.2±7.1）%, ranging from a minimum value of 1.5% for Putuo District to a maximum value of 22% for Xuhui District.

关键词： air quality of Shanghai MODIS AOD API EEMD method World Expo 2010

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STABILITY OF THE RAREFACTION WAVE IN THE SINGULAR LIMIT OF A SHARP INTERFACE PROBLEM FOR THE COMPRESSIBLE NAVIER-STOKES/allen-CAHN SYSTEM

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Acta Mathematica Scientia 2024年第4期44卷 1507-1523页

作者： Yunkun CHEN Bin huang Xiaoding SHI School of Mathematics and Computer Science Anshun UniversityAnshun 561000China College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China

This paper is concerned with the global well-posedness of the solution to the compressible Navier-Stokes/allen-Cahn system and its sharp interface limit in one-dimensional *** the perturbations with small energy but possibly large oscillations of rarefaction wave solutions near phase separation,and where the strength of the initial phase field could be arbitrarily large,we prove that the solution of the Cauchy problem exists for all time,and converges to the centered rarefaction wave solution of the corresponding standard two-phase Euler equation as the viscosity and the thickness of the interface tend to *** proof is mainly based on a scaling argument and a basic energy method.

关键词： compressible Navier-Stokes equations allen-Cahn equation rarefaction wave sharp interface limit stability

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MBA:A market-based approach to data allocation and dynamic migration for cloud database

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Science China(Information Sciences) 2012年第9期55卷 1935-1948页

作者： huang allen Microsoft SQL China R&D Center

With the coming shift to cloud computing,cloud database is emerging to provide database service over the *** the cloud-based environment,data are distributed at Internet scale and the system needs to handle a huge number of user queries simultaneously without *** data are distributed among the servers has a crucial impact on the query load distribution and the system response *** this paper,we propose a market-based control method,called MBA,to achieve query load balance via reasonable data *** MBA,database nodes are treated as traders in a market,and certain market rules are used to intelligently decide data allocation and *** built a prototype system and conducted extensive *** results show that the MBA method significantly improves system performance in terms of average query response time and fairness.

关键词： market-based control data distribution load balancing

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林乐知与上海中西书院:古代书院的传承与嬗变

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苏州教育学院学报 2024年第3期41卷 38-45页

作者：黄冠平苏州大学光电科学与工程学院江苏苏州215006

林乐知在创办中西书院的过程中努力实践“中西并重”的教育观。虽然林乐知的本质仍然是基督教文化的传播者,但他到中国以后通过学习、研究中国语言、文化,对中国传统文化有了相当程度的了解和理解,其中显示的他的知识适应性和文化适应... 详细信息

林乐知在创办中西书院的过程中努力实践“中西并重”的教育观。虽然林乐知的本质仍然是基督教文化的传播者,但他到中国以后通过学习、研究中国语言、文化,对中国传统文化有了相当程度的了解和理解,其中显示的他的知识适应性和文化适应性超越了同时代的其他传教士。因而他对中国古代书院文化的传承与嬗变,是中西书院之所以取得办学影响,至今仍有回顾和研究价值的原因。

关键词：古代书院中西书院林乐知传承嬗变

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A Study on Retrieving Atmospheric Profiles from EOS/AIRS Observations

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Acta meteorologica Sinica 2005年第1期19卷 112-119页

作者：官莉 allen huang 李俊 Department of Electronic Engineering Nanjing University ofInformation Science & Technology Nanjing 210044 China University of Wisconsin Madison WI 53705 USA

The paper presents the algorithms for retrieving atmospheric temperature andmoisture profiles and surface skin temperature from the high-spectral-resolution AtmosphericInfrared Sounder (AIRS) with a statistical technique based on principal component analysis. Thesynthetic regression coefficients for the statistical retrieval are obtained by using a fastradiative transfer model with atmospheric characteristics taken from a dataset of global radiosondesof atmospheric temperature and moisture profiles. Retrievals are evaluated by comparison withradiosonde observations and European Center of Medium-Range Weather Forecasts (ECMWF) analyses. AIRSretrievals of temperature and moisture are in general agreement with the distributions from ECMWFanalysis fields and radiosonde observations, but AIRS depicts more detailed structure due to itshigh spectral resolution (hence, high vertical spatial resolution).

关键词： AIRS (Atmospheric Infrared Sounder) principal component regression atmospheric profile retrieval

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Driving efficiency in a high-throughput metabolic stability assay through a generic high-resolution accurate mass method and automated data mining

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Protein & Cell 2011年第8期2卷 680-688页

作者： Wenqing Shui Song Lin allen Zhang Yan Chen Yingying huang Mark Sanders College of Life Sciences Nankai UniversityTianjin 300071China High-Throughput Molecular Drug Discovery Center Tianjin Joint Academy of Biotechnology and MedicineTianjin 300074China Metabolism&Pharmacokinetics NovartisEmeryvilleCA 94608USA Thermo Fisher Scientific San JoseCA 95134USA

Improving analytical throughput is the focus of many quantitative workflows being developed for early drug *** drug candidate screening,it is common practice to use ultra-high performance liquid chromatography(U-HPLC)coupled with triple quadrupole mass *** approach certainly results in short analytical run time;however,in assessing the true throughput,all aspects of the workflow needs to be considered,including instrument optimization and the necessity to re-run samples when information is *** we describe a high-throughput metabolic stability assay with a simplified instrument set-up which significantly improves the overall assay *** addition,as the data is acquired in a non-biased manner,high information content of both the parent compound and metabolites is gathered at the same time to facilitate the decision of which compounds to proceed through the drug discovery pipeline.

关键词： metabolic stability high-resolution mass spectrometry accurate mass ultra-high performance liquid chromatography

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Effects of the combination of mask preconditioning with midazolam pretreatment on anxiety and mask acceptance during pediatric inhalational induction and postoperative mask fear in children

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Chinese Medical Journal 2012年第11期125卷 1908-1914页

作者： LAN Yun-ping huang Zhen-hua G. allen Finley ZUO Yun-xia Translational Medical Neuroscience Center and Department of Anesthesiology West China Hospital Sichuan University Chengdu Sichuan 610041 China Department of Anesthesia and Psychology IWK Health Centre Dalhousie University 5850 University Avenue Halifax NS B3K 6R8 Canada

Background Anxiety and fear frequently causes an aversion to applying a face mask and increases difficulty during pediatric induction. There is at present little study of this problem. Therefore, the aim of this study was to investigate the effect of the combination of mask preconditioning and midazolam pretreatment on mask acceptance during pediatric induction and on postoperative mask fear. Methods One hundred and sixty children were randomly assigned into four groups： the mask preconditioning group （MaG）, the midazolam pretreatment group （MiG）, the mask/midazolam combination group （Ma/MiG）, and the saline group （SAG）. The Modified Yale Preoperative Anxiety Scale （m-YPAS） was employed to assess the anxiety in the operation room （OR）. A Mask Acceptance Score （MAS） was measured during inhalational induction and the incidence of mask fear （MAS 〈2） was evaluated postoperatively. Results The MaG and Ma/MiG groups had the highest mask acceptance scores but there were no differences between these two groups （P 〈0.05）. The average anxiety level of children entering the OR was much lower in the MaG and Ma/MiG groups than in the SaG group （P 〈0.05）. During induction, the anxiety level increased in the SaG and MaG groups but decreased in the MiG and Ma/MiG groups （P 〈0.05）. At the postoperative third day, the incidence of mask fears was as high as 23% in the SaG group, 15% in the MiG group, but only 2.5% in the MaG and Ma/MiG groups. Conclusions The single use of mask preconditioning has a better influence than midazolam for increasing mask acceptance during inhalational induction and reducing postoperative mask fear, reducing the anxiety level during induction, improving induction compliance and shortening the total mask time. A mask preconditioning and midazolam combination did not increase mask acceptance during inhalational induction, reduce mask fears postoperatively, improve induction compliance, nor shorten the total mask time. But it can better reduce the anxiety lev

关键词： mask acceptance, mask fear inhalational induction, child temperament, midazolam

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Studies on TOP executive performance evaluation system of Chinese listed companies

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Journal of Harbin Institute of Technology(New Series) 2004年第6期11卷 671-674页

作者：王德武姜国庆姜硕 huang allen R School of Management Shenyang University of Technology Shenyang 110023 China Griffith University Australia

According to the development status of Chinese listed companies, it is important to implement a stock option incentive plan for the top executives (TE) of the companies. It is necessary to establish a set of indices to evaluate a top executive’s performance and award performance-based stock options to them scientifically and reasonably. This thesis sets indices from the perspective of the top executive’s behaviour and results, which differs from the traditional methods performance evaluation.

关键词：中国列名公司企业管理性能评估系统指数集最高级行政管理人员股权选择奖金计划

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