Tourism has been one of the largest industries in China. At present the townsmen＇s travel expenditure has been a bit more than countrymen＇s. It has become one of the most popular topics in the tourism research liter...Tourism has been one of the largest industries in China. At present the townsmen＇s travel expenditure has been a bit more than countrymen＇s. It has become one of the most popular topics in the tourism research literature. So based on the data of past years, this paper tries to analyze the expenditure structures of domestic tourism of urban residents in China.展开更多
Novel composite material with a wide pore distribution was synthesized by an in situ technique using spent FCC catalyst as raw material. The characterization results indicated that the composite material contained 56....Novel composite material with a wide pore distribution was synthesized by an in situ technique using spent FCC catalyst as raw material. The characterization results indicated that the composite material contained 56.7% of zeolite Y and exhibited a much larger specific surface area and pore volume as well as strong hydrothermal stability. Fluid catalytic cracking(FCC) catalyst was prepared based on the composite material. The results indicated that the as-prepared catalyst possessed a unique pore structure that was advantageous to the diffusion-controlled reactions. In addition, the attrition resistance, activity and hydrothermal stability of the studied catalyst were superior to those of the reference catalyst. The catalyst also exhibited excellent nickel and vanadium passivation performance, strong bottoms upgrading selectivity, and better gasoline and coke selectivity. In comparison to the reference catalyst, the yields of the gasoline and light oil increased by 1.61 and 1.31 percentage points, respectively, and the coke yield decreased by 0.22 percentage points, and the olefin content in the produced gasoline reduced by 2.51 percentage points, with the research octane number increased by 0.7 unit.展开更多
To set up self-rule organizations forsocial life of the mass at city’s local level isnot uncommon in other countries.But toset up a resident committee of completestructure and with overall functions thatserves as an ...To set up self-rule organizations forsocial life of the mass at city’s local level isnot uncommon in other countries.But toset up a resident committee of completestructure and with overall functions thatserves as an intermediate between the localpolitical organization and family units issomething peculiar to China.Then。展开更多
文摘Tourism has been one of the largest industries in China. At present the townsmen＇s travel expenditure has been a bit more than countrymen＇s. It has become one of the most popular topics in the tourism research literature. So based on the data of past years, this paper tries to analyze the expenditure structures of domestic tourism of urban residents in China.
基金provided by the National Natural Science Foundation of China(No.21371055)the Hunan provincial Natural Science Foundation of China(No.11JJ2008)the Hunan provincial Colleges and Universities Innovation Platform Open Fund Project(No.15K049)
文摘Novel composite material with a wide pore distribution was synthesized by an in situ technique using spent FCC catalyst as raw material. The characterization results indicated that the composite material contained 56.7% of zeolite Y and exhibited a much larger specific surface area and pore volume as well as strong hydrothermal stability. Fluid catalytic cracking(FCC) catalyst was prepared based on the composite material. The results indicated that the as-prepared catalyst possessed a unique pore structure that was advantageous to the diffusion-controlled reactions. In addition, the attrition resistance, activity and hydrothermal stability of the studied catalyst were superior to those of the reference catalyst. The catalyst also exhibited excellent nickel and vanadium passivation performance, strong bottoms upgrading selectivity, and better gasoline and coke selectivity. In comparison to the reference catalyst, the yields of the gasoline and light oil increased by 1.61 and 1.31 percentage points, respectively, and the coke yield decreased by 0.22 percentage points, and the olefin content in the produced gasoline reduced by 2.51 percentage points, with the research octane number increased by 0.7 unit.
文摘To set up self-rule organizations forsocial life of the mass at city’s local level isnot uncommon in other countries.But toset up a resident committee of completestructure and with overall functions thatserves as an intermediate between the localpolitical organization and family units issomething peculiar to China.Then。
