This paper analyzes the correlativity between new products output and science ＆ technology resources input by the method of Gray Relevancy model, and finds that the spending for new products has greatest correlativit...This paper analyzes the correlativity between new products output and science ＆ technology resources input by the method of Gray Relevancy model, and finds that the spending for new products has greatest correlativity with new products output in large and medium sized state-owned industrial enterprises.展开更多
Here, we estimate the rationality of specific agricultural inputs and discuss the sensitivity of integrated agricultural output to various resources input for Chaohu City, China. We used two parameters, marginal outpu...Here, we estimate the rationality of specific agricultural inputs and discuss the sensitivity of integrated agricultural output to various resources input for Chaohu City, China. We used two parameters, marginal output and elastic coefficient, and the Technique for Order Preference by Similarity to Ideal Solution （TOPSIS） method, which has an unambiguous geometric meaning and is simple and convenient, to integrate various output and input. The results indicate that for most of 2001-2009, agricultural inputs rose except that the number of people engaged in agricultural production fell. Although integrated agriculture output increased, the proportion of resources with a negative utilization efficiency was 23.82% from 2001 to 2009. Integrated output was more sensitive to agricultural pesticide, the irrigation ratio and the use of plastic film. Integrated outputs may be increased by moderate decreases in input. This type of agricultural production meets the requirements of resource saving and is a sustainable mode of resource utilization.展开更多
With the Taihu Basin as a study area,using the spatially distributed and mechanism-based SWAT model,preliminary simulations of nutrient transport in the Taihu Basin during the period of 1995~2002 has been carried out....With the Taihu Basin as a study area,using the spatially distributed and mechanism-based SWAT model,preliminary simulations of nutrient transport in the Taihu Basin during the period of 1995~2002 has been carried out.The topography,soil,meteorology and land use with industrial point pollution discharge,the loss of agricultural fertilizers,urban sewerage,and livestock drainages were all considered in the boundary conditions of the simulations.The model was calibrated and validated against water quality monitoring data from 2001 to 2002.The results show that the annual total productions of nitrogen(TN)and phosphorus(TP)into Lake Taihu are 40000t and 2000t respectively.Nutrient from the Huxi Region is a major resource for Lake Taihu.The non-point source(surface source)pollution is the main form of catchment sources of nutrients into Lake Taihu,occupied TN 53%and TP 56%respectively.TN and TP nutrients from industrial point pollution discharge are 30%and 16%,and sewerage in both forms of point source and non-point source are TN 31%and TP 47%.Both the loss of agricultural fertilizers and livestock drainages from the catchment should be paid more attention as an important nutrient source.The results also show that SWAT is an effective model for the simulation of temporally and spatially nutrient changes and for the assessment of the trends in a catchment scale.展开更多
文摘This paper analyzes the correlativity between new products output and science ＆ technology resources input by the method of Gray Relevancy model, and finds that the spending for new products has greatest correlativity with new products output in large and medium sized state-owned industrial enterprises.
基金National Natural Science Foundation of China (No. 41271467 and No. 40930103)
文摘Here, we estimate the rationality of specific agricultural inputs and discuss the sensitivity of integrated agricultural output to various resources input for Chaohu City, China. We used two parameters, marginal output and elastic coefficient, and the Technique for Order Preference by Similarity to Ideal Solution （TOPSIS） method, which has an unambiguous geometric meaning and is simple and convenient, to integrate various output and input. The results indicate that for most of 2001-2009, agricultural inputs rose except that the number of people engaged in agricultural production fell. Although integrated agriculture output increased, the proportion of resources with a negative utilization efficiency was 23.82% from 2001 to 2009. Integrated output was more sensitive to agricultural pesticide, the irrigation ratio and the use of plastic film. Integrated outputs may be increased by moderate decreases in input. This type of agricultural production meets the requirements of resource saving and is a sustainable mode of resource utilization.
基金supported by the Na-tional Key Fundamental Research Development Planning Project(GrantNo.2002CB412300-1)the Knowledge Innovation Project of the Chinese Academy of Sciences(GrantNo.KZCX1-SW-12-1).
文摘With the Taihu Basin as a study area,using the spatially distributed and mechanism-based SWAT model,preliminary simulations of nutrient transport in the Taihu Basin during the period of 1995~2002 has been carried out.The topography,soil,meteorology and land use with industrial point pollution discharge,the loss of agricultural fertilizers,urban sewerage,and livestock drainages were all considered in the boundary conditions of the simulations.The model was calibrated and validated against water quality monitoring data from 2001 to 2002.The results show that the annual total productions of nitrogen(TN)and phosphorus(TP)into Lake Taihu are 40000t and 2000t respectively.Nutrient from the Huxi Region is a major resource for Lake Taihu.The non-point source(surface source)pollution is the main form of catchment sources of nutrients into Lake Taihu,occupied TN 53%and TP 56%respectively.TN and TP nutrients from industrial point pollution discharge are 30%and 16%,and sewerage in both forms of point source and non-point source are TN 31%and TP 47%.Both the loss of agricultural fertilizers and livestock drainages from the catchment should be paid more attention as an important nutrient source.The results also show that SWAT is an effective model for the simulation of temporally and spatially nutrient changes and for the assessment of the trends in a catchment scale.
