A summary review of dominant regions of cassava growing in China;

Analysis on the regional advantages of the cities in Yangtze River delta in development;

Then the new regional comparative advantages of this area is analyzed,Finally,the major countermeasures for bringing the regional advantages into full play and raising the competitiveness of regional entirety are suggested.

Giving full play to regional advantages and building high effective ecotype crops system are expounded, including following four ways, such as the unprocessed food grains type taking good quality rape, special wheat and quality rice as the key, the multiple.

Based on the investigation on the production and current export situation of China s producing area,the change of customer demand in Japan s market and the characteristic of competitors are analyzed,and an approach in offered to exert the regional advantage,aim .

From the facet of the regional advantage, the paper mainly uses the indexes of the specialized rate of area and the growth elastic coefficient ,quantitatively analyzes the extant and potential advantages of trades of the tertiary industry in Jinan city and puts forward the consulting suggestion to adjust and optimize the structure.

The new interpretation of the clusters might give new content to regional advantages and offer new th.

By using the concentration comparison method and a graphic algorithm which absorbs the advantages from convex polygon method and scan point by point method, predominance diagrams and Pourbaix diagrams for V-H_2O, Cl-H_2O and V-Cl-H_2O systems were generated in this paper by computer.