Aerosol optical depth （AOD） is the most basic paxalneter that describes the optical properties of atmospheric aerosols, and it can be used to indicate aerosol content. In this study, we assimilated AOD data from the...Aerosol optical depth （AOD） is the most basic paxalneter that describes the optical properties of atmospheric aerosols, and it can be used to indicate aerosol content. In this study, we assimilated AOD data from the Fengyun-3A （FY-3A） and MODIS meteorological satellite using the Gridpoint Statistical Interpolation three-dimensional variational data assimilation system. Experiments were conducted for a dust storm over East Asia in April 2011. Each 0600 UTC analysis initialized a 24-h Weather Research and Forecasting with Chemistry model forecast. The results generally showed that the assimilation of satellite AOD observational data can significantly improve model aerosol mass prediction skills. The AOD distribution of the analysis field was closer to the observations of the satellite after assimilation of satellite AOD data. In addition, the analysis resulting from the experiment assimilating both FY-3A/MERSI （Medium-resolution Spectral Imager） AOD data and MODIS AOD data had closer agreement with the ground-based values than the individual assimilation of the two datasets for the dust storm over East Asia. These results suggest that the Chinese FY-3A satellite aerosol products can be effectively applied to numerical models and dust weather analysis.展开更多
This paper presents investigations of bankruptcy predicting models which can be useful for external users of a financial statement. Only the methods of financial analysis for insolvency prediction, useful on the basis...This paper presents investigations of bankruptcy predicting models which can be useful for external users of a financial statement. Only the methods of financial analysis for insolvency prediction, useful on the basis of financial statements, were investigated. The paper studied the influence of insolvency on the development of the Latvian Economy, including such relevant points： dynamics of number of insolvency cases in Latvia, data of the payment discipline of debts, tax liabilities of the insolvent companies, dynamics of unemployment support payments. Empirical investigations shows that only Altman＇s Z＇＂ and Fulmer＇s H models demonstrate accuracy above 80% in all analyzed business sectors and they are applicable for Latvian companies. The other models are useful to some particular business sector.展开更多
基金supported by the National Key Research and Development Program of China (Grant Nos.2017YFC1502100 and 2016YFA0602302)the Natural Science Foundation of Jiangsu Province (Grant Nos.BK20160954 and BK20170940)+3 种基金the Beijige Funding from Jiangsu Research Institute of Meteorological Science (Grant Nos.BJG201510 and BJG201604)the Startup Foundation for Introducing Talent of NUIST (Grant Nos.2016r27,2016r043 and 2017r058)a project for data application of Fengyun3 meteorological satellite [FY-3(02)UDS-1.1.2]the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Aerosol optical depth （AOD） is the most basic paxalneter that describes the optical properties of atmospheric aerosols, and it can be used to indicate aerosol content. In this study, we assimilated AOD data from the Fengyun-3A （FY-3A） and MODIS meteorological satellite using the Gridpoint Statistical Interpolation three-dimensional variational data assimilation system. Experiments were conducted for a dust storm over East Asia in April 2011. Each 0600 UTC analysis initialized a 24-h Weather Research and Forecasting with Chemistry model forecast. The results generally showed that the assimilation of satellite AOD observational data can significantly improve model aerosol mass prediction skills. The AOD distribution of the analysis field was closer to the observations of the satellite after assimilation of satellite AOD data. In addition, the analysis resulting from the experiment assimilating both FY-3A/MERSI （Medium-resolution Spectral Imager） AOD data and MODIS AOD data had closer agreement with the ground-based values than the individual assimilation of the two datasets for the dust storm over East Asia. These results suggest that the Chinese FY-3A satellite aerosol products can be effectively applied to numerical models and dust weather analysis.
文摘This paper presents investigations of bankruptcy predicting models which can be useful for external users of a financial statement. Only the methods of financial analysis for insolvency prediction, useful on the basis of financial statements, were investigated. The paper studied the influence of insolvency on the development of the Latvian Economy, including such relevant points： dynamics of number of insolvency cases in Latvia, data of the payment discipline of debts, tax liabilities of the insolvent companies, dynamics of unemployment support payments. Empirical investigations shows that only Altman＇s Z＇＂ and Fulmer＇s H models demonstrate accuracy above 80% in all analyzed business sectors and they are applicable for Latvian companies. The other models are useful to some particular business sector.
