An indicator system closely connected with eco-environment, in which indicator involves in such fields as society, economy, resources, environment and ecology, is first proposed for eco-environmental quality assessmen...An indicator system closely connected with eco-environment, in which indicator involves in such fields as society, economy, resources, environment and ecology, is first proposed for eco-environmental quality assessment. Then, a hierarchical model with four levels is established by virtue of these indicators and attributes. In the model, weights of indicators and attributes are determined by combining Delphi method with the Analytic Hierarchy Process (AHP) and a statistic method is used to eliminate the influences arising from the differences in dimension and magnitude of indicators. On these grounds, an AHP-statistics model is provided for regional eco-environmental quality assessment. As a case, such AHP-statistics model is utilized in the dynamic analysis of regional eco-environmental assessment in Chaohu Lake basin. Study results show that natural environmental quality in the watershed was in the declining state while social environmental quality was in a markedly improved situation from 1996, and the synthetic eco-environmental quality was gradually and slowly improved under the common influences of both natural and social environmental factors. Example of application testified the capacities of above methodology to evaluate the real and dynamic state of regional eco-environmental quality.展开更多
Zinc(Zn) deficiency in animals became of interest until the 1950s.In this paper,progresses in researches on physiology of Zn deficiency in animals,phytate effect on bioavailability of Zn,and role of phytase in healing...Zinc(Zn) deficiency in animals became of interest until the 1950s.In this paper,progresses in researches on physiology of Zn deficiency in animals,phytate effect on bioavailability of Zn,and role of phytase in healing Zn deficiency of animals were reviewed.Several studies demonstrated that Zn is recycled via the pancreas;the problem of Zn deficiency was controlled by Zn homeostasis.The endogenous secretion of Zn is considered as an important factor influencing Zn deficiency,and the critical molar ratio is 10.Phytate(inositol hexaphosphate) constituted up to 90% of the organically bound phosphorus in seeds.Great improvement has been made in recent years on isolating and measuring phytate,and its structure is clear.Phytate is considered to reduce Zn bioavailability in animal.Phytase is the enzyme that hydrolyzes phytate and is present in yeast,rye bran,wheat bran,barley,triticale,and many bacteria and fungi.Zinc nutrition and bioavailability can be enhanced by addition of phytase to animal feeds.Therefore,using phytase as supplements,the most prevalent Zn deficiency in animals may be effectively corrected without the mining and smelting of several tons of zinc daily needed to correct this deficiency by fortification worldwide.展开更多
Through denoting each expert as an agent and viewing a multiple criteria decision-making as a synthesis problem of aggregating experts＇ ratings, a multi-agent blind model （MABM） is developed for regional eco-enviro...Through denoting each expert as an agent and viewing a multiple criteria decision-making as a synthesis problem of aggregating experts＇ ratings, a multi-agent blind model （MABM） is developed for regional eco-environmental quality assessment. In this model, the ratings of the evaluated object under an index, given by expert group, are first utilized to construct a series of blind numbers. In general, each index will correspond to different blind numbers. On the basis of aggregating index weights, the rank score in the form of a blind number is obtained for the evaluated object. Then, by means of calculating expected value of the above blind number, its rank score is further converted into a crisp value. By way of comparing the expected value with classification standards, eco-environmental quality of the evaluated sample could he identified successfully in the end. As a case, the MABM is used to evaluate the eco-environmental quality of Chaohu Lake basin. Study result shows that the MABM is a useful model for regional eco-environmental quality assessment.展开更多
基金Under the auspices of Tackling Key Program for Science and Technology of Anhui Province (No. 07010302165)Natural Science Foundation of Anhui Province (No. 050450303)
文摘An indicator system closely connected with eco-environment, in which indicator involves in such fields as society, economy, resources, environment and ecology, is first proposed for eco-environmental quality assessment. Then, a hierarchical model with four levels is established by virtue of these indicators and attributes. In the model, weights of indicators and attributes are determined by combining Delphi method with the Analytic Hierarchy Process (AHP) and a statistic method is used to eliminate the influences arising from the differences in dimension and magnitude of indicators. On these grounds, an AHP-statistics model is provided for regional eco-environmental quality assessment. As a case, such AHP-statistics model is utilized in the dynamic analysis of regional eco-environmental assessment in Chaohu Lake basin. Study results show that natural environmental quality in the watershed was in the declining state while social environmental quality was in a markedly improved situation from 1996, and the synthetic eco-environmental quality was gradually and slowly improved under the common influences of both natural and social environmental factors. Example of application testified the capacities of above methodology to evaluate the real and dynamic state of regional eco-environmental quality.
文摘Zinc(Zn) deficiency in animals became of interest until the 1950s.In this paper,progresses in researches on physiology of Zn deficiency in animals,phytate effect on bioavailability of Zn,and role of phytase in healing Zn deficiency of animals were reviewed.Several studies demonstrated that Zn is recycled via the pancreas;the problem of Zn deficiency was controlled by Zn homeostasis.The endogenous secretion of Zn is considered as an important factor influencing Zn deficiency,and the critical molar ratio is 10.Phytate(inositol hexaphosphate) constituted up to 90% of the organically bound phosphorus in seeds.Great improvement has been made in recent years on isolating and measuring phytate,and its structure is clear.Phytate is considered to reduce Zn bioavailability in animal.Phytase is the enzyme that hydrolyzes phytate and is present in yeast,rye bran,wheat bran,barley,triticale,and many bacteria and fungi.Zinc nutrition and bioavailability can be enhanced by addition of phytase to animal feeds.Therefore,using phytase as supplements,the most prevalent Zn deficiency in animals may be effectively corrected without the mining and smelting of several tons of zinc daily needed to correct this deficiency by fortification worldwide.
基金Under the auspices of the Natural Science Foundation of Anhui Province (No. 050450303 )
文摘Through denoting each expert as an agent and viewing a multiple criteria decision-making as a synthesis problem of aggregating experts＇ ratings, a multi-agent blind model （MABM） is developed for regional eco-environmental quality assessment. In this model, the ratings of the evaluated object under an index, given by expert group, are first utilized to construct a series of blind numbers. In general, each index will correspond to different blind numbers. On the basis of aggregating index weights, the rank score in the form of a blind number is obtained for the evaluated object. Then, by means of calculating expected value of the above blind number, its rank score is further converted into a crisp value. By way of comparing the expected value with classification standards, eco-environmental quality of the evaluated sample could he identified successfully in the end. As a case, the MABM is used to evaluate the eco-environmental quality of Chaohu Lake basin. Study result shows that the MABM is a useful model for regional eco-environmental quality assessment.
