The region of south China is sometimes subject to major climatic catastrophes in winter. To have a clear understanding, the time in which extremely severe cold months occur in the south China wintertime over the past ...The region of south China is sometimes subject to major climatic catastrophes in winter. To have a clear understanding, the time in which extremely severe cold months occur in the south China wintertime over the past 45 years are determined and characteristics of the 500-hPa geopotential fields and SST fields are studied for the simultaneous and preceding 6-month periods. Similarity exists in the 500-hPa geopotential fields between each current severely cold month, with the geopotential pattern of being high in the north, but low in the south, of Asian-Pacific region and meridional circulation developing. The work presents anomalies of the months with significant differences in the 500-hPa geopotential field of the previous periods. The SSTA is continuous in the distribution from each extremely severe cold winter month back to the 6 months leading up to it for the region of south China while the SST pattern is of El Ni?o in January and the preceding 1 ~ 6 months for equatorial eastern Pacific but of La Ni?a in February and December. It is concluded that the prediction of severely cold winter months are possible with the use of the geopotential field at 500 hPa and the SST fields for the months ahead of the target time.展开更多
CHINA BUSINESS MONTHLY The top 500 foreigninvested enterprises in China (2000-2001) was announced recently. These enterprises were ranked on the basis of their sales revenue. With the annual sales revenue of 31.289 bi...CHINA BUSINESS MONTHLY The top 500 foreigninvested enterprises in China (2000-2001) was announced recently. These enterprises were ranked on the basis of their sales revenue. With the annual sales revenue of 31.289 billion yuan in 2000, Motorola (Tianjin) Electronics Limited topped Shanghai Volkswagon Automotive Company Ltd. for the first time and became the No.1 in the new rank. Following them were Guangdong Mobile Technology Co., Ltd., China Offshore Petroleum (China) Limited, SAIC-Volkswagon Sales Co...展开更多
Some brief informations about AC 500 kV substations inChina, historical data of their design and essential design principles arepresented in thes paper. Some technical and engineering problems ofAC 500 kV substation d...Some brief informations about AC 500 kV substations inChina, historical data of their design and essential design principles arepresented in thes paper. Some technical and engineering problems ofAC 500 kV substation design and construction are discussed. It isemphasized to introduce the 500 kV substation scales, main electricalconnections, selection of equipment and apparatus, insulationcoordination, distribution sWitchyard, control and protection etc.. Herewe also discuss the policy of project cost control at present time and aprospective view of China AC substahons in future.展开更多
基金Research on short-term climatic prediction systems in China" - a key scientific and technological project in the national 9th
文摘The region of south China is sometimes subject to major climatic catastrophes in winter. To have a clear understanding, the time in which extremely severe cold months occur in the south China wintertime over the past 45 years are determined and characteristics of the 500-hPa geopotential fields and SST fields are studied for the simultaneous and preceding 6-month periods. Similarity exists in the 500-hPa geopotential fields between each current severely cold month, with the geopotential pattern of being high in the north, but low in the south, of Asian-Pacific region and meridional circulation developing. The work presents anomalies of the months with significant differences in the 500-hPa geopotential field of the previous periods. The SSTA is continuous in the distribution from each extremely severe cold winter month back to the 6 months leading up to it for the region of south China while the SST pattern is of El Ni?o in January and the preceding 1 ~ 6 months for equatorial eastern Pacific but of La Ni?a in February and December. It is concluded that the prediction of severely cold winter months are possible with the use of the geopotential field at 500 hPa and the SST fields for the months ahead of the target time.
文摘CHINA BUSINESS MONTHLY The top 500 foreigninvested enterprises in China (2000-2001) was announced recently. These enterprises were ranked on the basis of their sales revenue. With the annual sales revenue of 31.289 billion yuan in 2000, Motorola (Tianjin) Electronics Limited topped Shanghai Volkswagon Automotive Company Ltd. for the first time and became the No.1 in the new rank. Following them were Guangdong Mobile Technology Co., Ltd., China Offshore Petroleum (China) Limited, SAIC-Volkswagon Sales Co...
文摘Some brief informations about AC 500 kV substations inChina, historical data of their design and essential design principles arepresented in thes paper. Some technical and engineering problems ofAC 500 kV substation design and construction are discussed. It isemphasized to introduce the 500 kV substation scales, main electricalconnections, selection of equipment and apparatus, insulationcoordination, distribution sWitchyard, control and protection etc.. Herewe also discuss the policy of project cost control at present time and aprospective view of China AC substahons in future.
