Erosion and transport of soil has worldwide implications for agriculture, landscape stability, climate, natural hazards, and clean, renewable resources of water and air. Assured access to clean water and a healthy and...Erosion and transport of soil has worldwide implications for agriculture, landscape stability, climate, natural hazards, and clean, renewable resources of water and air. Assured access to clean water and a healthy and safe environment requires an ethic of conservation and protection. The minimum scale in which these principles apply successfully is basin wide. These are the fundamental concerns of the Sino-US Centers for Soil and Water Conservation and Environmental Protection.展开更多
In 2009,the pig iron output of China increased dramatically up to 543.75 Mt and was 15.87%higher than that in 2008,accounting for 60.53%of the world production.The processing of pig iron must consume huge amount of ir...In 2009,the pig iron output of China increased dramatically up to 543.75 Mt and was 15.87%higher than that in 2008,accounting for 60.53%of the world production.The processing of pig iron must consume huge amount of iron ores and coal and consequently leads to the shortage of ores and cokemaking coals supply,with prices soaring but quality worsening remarkably.How to maintain or even improve the efficiency of blast furnace production under negative conditions of constantly worsening resources of iron ore and coal has become an important scenario the Chinese ironmaking industry must face.In this paper,the production with high coal injection rate,low fuel rate and big productivity in the Wuhan Iron and Steel Corporation(Group) was introduced and revealed.The quantitative correlation between blast furnace production efficiency and diverse technical measures through combined mass-heat balances and gas-liquid counter-current flow dynamics analysis.Moreover,potential problems and countermeasures in ironmaking by feeding high Al_2O_3 and low grade iron ores were also discussed.展开更多
This study presents a spatial analysis of priority areas for biodiversity conservation (PABCs) in Brazil and their coverage by federal protected areas as an indicator of the level of protection afforded to biodiversit...This study presents a spatial analysis of priority areas for biodiversity conservation (PABCs) in Brazil and their coverage by federal protected areas as an indicator of the level of protection afforded to biodiversity in the country and the convergence of environmental protection policies in the sphere of federal government. Georeferenced data were processed using a geographic information system, enabling the calculation of areas, analyses of superimpositions, localizations, and the obtainment of other information using spatial features manipulated in this system. A comparative analysis is done of the PABCs mapped in two periods (2003 and 2007) to ascertain the evolution of this public policy instrument in detecting environmental priorities in protected areas. The improved coverage of PABCs by protected areas in the more recent mapping indicates a good convergence of environmental policies, which are enhanced by technical improvements to mapping procedures and methods for identifying such areas. As a result, the priority areas for biodiversity conservation could become a protected area regulated and recognized by the federal government.展开更多
In 1995, the total output of motor vehicles in China was around 1.45 million units, ranking the 11th in the world; the total motorcycle output 7.83 million, ranking the first in the world. As for the vehicle populatio...In 1995, the total output of motor vehicles in China was around 1.45 million units, ranking the 11th in the world; the total motorcycle output 7.83 million, ranking the first in the world. As for the vehicle population in China, there are about 10.50 million automobiles, 18 million motorcycles, and nearly 10 million展开更多
文摘Erosion and transport of soil has worldwide implications for agriculture, landscape stability, climate, natural hazards, and clean, renewable resources of water and air. Assured access to clean water and a healthy and safe environment requires an ethic of conservation and protection. The minimum scale in which these principles apply successfully is basin wide. These are the fundamental concerns of the Sino-US Centers for Soil and Water Conservation and Environmental Protection.
文摘In 2009,the pig iron output of China increased dramatically up to 543.75 Mt and was 15.87%higher than that in 2008,accounting for 60.53%of the world production.The processing of pig iron must consume huge amount of iron ores and coal and consequently leads to the shortage of ores and cokemaking coals supply,with prices soaring but quality worsening remarkably.How to maintain or even improve the efficiency of blast furnace production under negative conditions of constantly worsening resources of iron ore and coal has become an important scenario the Chinese ironmaking industry must face.In this paper,the production with high coal injection rate,low fuel rate and big productivity in the Wuhan Iron and Steel Corporation(Group) was introduced and revealed.The quantitative correlation between blast furnace production efficiency and diverse technical measures through combined mass-heat balances and gas-liquid counter-current flow dynamics analysis.Moreover,potential problems and countermeasures in ironmaking by feeding high Al_2O_3 and low grade iron ores were also discussed.
文摘This study presents a spatial analysis of priority areas for biodiversity conservation (PABCs) in Brazil and their coverage by federal protected areas as an indicator of the level of protection afforded to biodiversity in the country and the convergence of environmental protection policies in the sphere of federal government. Georeferenced data were processed using a geographic information system, enabling the calculation of areas, analyses of superimpositions, localizations, and the obtainment of other information using spatial features manipulated in this system. A comparative analysis is done of the PABCs mapped in two periods (2003 and 2007) to ascertain the evolution of this public policy instrument in detecting environmental priorities in protected areas. The improved coverage of PABCs by protected areas in the more recent mapping indicates a good convergence of environmental policies, which are enhanced by technical improvements to mapping procedures and methods for identifying such areas. As a result, the priority areas for biodiversity conservation could become a protected area regulated and recognized by the federal government.
文摘In 1995, the total output of motor vehicles in China was around 1.45 million units, ranking the 11th in the world; the total motorcycle output 7.83 million, ranking the first in the world. As for the vehicle population in China, there are about 10.50 million automobiles, 18 million motorcycles, and nearly 10 million