Today environmental assessment is considered and used as the basis and foundation of any kind of human activity. This is the science which gives human the consciousness about abilities and disabilities of his surround...Today environmental assessment is considered and used as the basis and foundation of any kind of human activity. This is the science which gives human the consciousness about abilities and disabilities of his surroundings. This study tried to assess and provide the potential survey of lands in Khuzestan province for agricultural activities by taking into account the climatic elements and displaying different elements in different seasons. To achieve this goal, first produced data were analyzed in GIS software and then the data was tested by professors and experts of department of soil science and was weighted using the Buckley geometric mean model. Finally, the obtained weights were applied in the software and the obtained results are as follow: except some east parts of Khuzestan province which have proper climate for agricultural activities, other regions are not in good conditions and it is necessary to use cultivation with low water requirements and high resistance to heat and sunlight in these areas.展开更多
The seawater complexation capacity for heavy metals (copper, lead and cadmium )in the South China Sea was determined by anodic voltammetry and the conditional stability constants of these complexes were calculated. Th...The seawater complexation capacity for heavy metals (copper, lead and cadmium )in the South China Sea was determined by anodic voltammetry and the conditional stability constants of these complexes were calculated. The data showed that the complexation capacity of the South China Sea water was greater than that of seawater in the Huanghe Estuary and the coast water of Qingdao. The sequence of complexation capacity is C(CuL)】C(PbL)】C(CdL), and the conditional stability constants were in an opposite sequence: K.(CuL)【K(PbL)【 K(CdL).The types and shapes of the complexation capacity profiles for Cu 】 Cd and Pb were similan to those obtained by Buckley (1986) for the Atlantic Ocean water. Complexation capacity is maximum at the surface layer, decreasing with depth, reaching minimum at 750m, but increasing again near the sea bottom.展开更多
On testing for no effect of a predictor on response variable, some tests have been proposed in the literature. In this paper, one of them being a cusum test proposed by Buckley[1] is studied further. This test can be ...On testing for no effect of a predictor on response variable, some tests have been proposed in the literature. In this paper, one of them being a cusum test proposed by Buckley[1] is studied further. This test can be extended to treating the non-normal and time series cases. A Kolmogonov- Smirnov type test is suggested and studied too. The main observation is the link between the statistic and the Brownian bridge. Some small sample experiments are conducted to examine the power of the tests. In some non-normal cases the power is encouraging.展开更多
文摘Today environmental assessment is considered and used as the basis and foundation of any kind of human activity. This is the science which gives human the consciousness about abilities and disabilities of his surroundings. This study tried to assess and provide the potential survey of lands in Khuzestan province for agricultural activities by taking into account the climatic elements and displaying different elements in different seasons. To achieve this goal, first produced data were analyzed in GIS software and then the data was tested by professors and experts of department of soil science and was weighted using the Buckley geometric mean model. Finally, the obtained weights were applied in the software and the obtained results are as follow: except some east parts of Khuzestan province which have proper climate for agricultural activities, other regions are not in good conditions and it is necessary to use cultivation with low water requirements and high resistance to heat and sunlight in these areas.
基金This project was supported by a grant from the State Educational Commission for subsidizing excellent young teachers and a grant from the National Science Foundation Commission of China.
文摘The seawater complexation capacity for heavy metals (copper, lead and cadmium )in the South China Sea was determined by anodic voltammetry and the conditional stability constants of these complexes were calculated. The data showed that the complexation capacity of the South China Sea water was greater than that of seawater in the Huanghe Estuary and the coast water of Qingdao. The sequence of complexation capacity is C(CuL)】C(PbL)】C(CdL), and the conditional stability constants were in an opposite sequence: K.(CuL)【K(PbL)【 K(CdL).The types and shapes of the complexation capacity profiles for Cu 】 Cd and Pb were similan to those obtained by Buckley (1986) for the Atlantic Ocean water. Complexation capacity is maximum at the surface layer, decreasing with depth, reaching minimum at 750m, but increasing again near the sea bottom.
基金the National Natural Sciences Foundation of China a Grant from the United College of Chinese University of Hong Kong
文摘On testing for no effect of a predictor on response variable, some tests have been proposed in the literature. In this paper, one of them being a cusum test proposed by Buckley[1] is studied further. This test can be extended to treating the non-normal and time series cases. A Kolmogonov- Smirnov type test is suggested and studied too. The main observation is the link between the statistic and the Brownian bridge. Some small sample experiments are conducted to examine the power of the tests. In some non-normal cases the power is encouraging.
