In this paper,recursive equations are obtained for compound distribution with the number of claims belonging to(a,b)-family and the severity distribution of the mixed type.Numerical methods to solve these equations ar...In this paper,recursive equations are obtained for compound distribution with the number of claims belonging to(a,b)-family and the severity distribution of the mixed type.Numerical methods to solve these equations are presented,and some numerical results are given.展开更多
The characteristics of the moving course of Typhoon Matsa (No.0509), associated heavy rain and physical quantities fields have been analyzed, with the focus on the reason of the typhoon’s abrupt northeastward turn in...The characteristics of the moving course of Typhoon Matsa (No.0509), associated heavy rain and physical quantities fields have been analyzed, with the focus on the reason of the typhoon’s abrupt northeastward turn in Anhui Province and heavy rain concentrating in the northeast of typhoon center instead of near it. Meaningful conclusions are as follows. The reasons for typhoon abrupt turning are that the subtropical high pressure was moving southward and divergence fields of 200 hPa were to the right of the typhoon center; there was no obvious cold air invading Shandong after the typhoon entered the westerly belt; the southeasterly jet of typhoon and shear brought heavy rainfall to the Shandong peninsula before the typhoon entered Shandong. But after the typhoon’s movement into Shandong, the typhoon’s inverted trough brought the rainfall to the northern and central Shandong.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.19831020&10071003).
文摘In this paper,recursive equations are obtained for compound distribution with the number of claims belonging to(a,b)-family and the severity distribution of the mixed type.Numerical methods to solve these equations are presented,and some numerical results are given.
基金National Oceanographic and Meteorological Forecasting and Prewarning System (Phase I)
文摘The characteristics of the moving course of Typhoon Matsa (No.0509), associated heavy rain and physical quantities fields have been analyzed, with the focus on the reason of the typhoon’s abrupt northeastward turn in Anhui Province and heavy rain concentrating in the northeast of typhoon center instead of near it. Meaningful conclusions are as follows. The reasons for typhoon abrupt turning are that the subtropical high pressure was moving southward and divergence fields of 200 hPa were to the right of the typhoon center; there was no obvious cold air invading Shandong after the typhoon entered the westerly belt; the southeasterly jet of typhoon and shear brought heavy rainfall to the Shandong peninsula before the typhoon entered Shandong. But after the typhoon’s movement into Shandong, the typhoon’s inverted trough brought the rainfall to the northern and central Shandong.
