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《保鲜与加工》1997,(6):116-121
A review on environment-monitoring biosensors is presented.During recent years,various environment-monitoring biosensors are fast developed.They are applied to various areas,such as aquatic environment,atmosphere environment et al.The developing trend of environment_monitoring biosensors is also discussed. 相似文献
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The externality of surrounding is introduced into the 2-capital of economical increasing models, which includes human factors, to explore the influences of circumstances contradiction on the human capital formation. The normal and special nash equilibrium of environmental and human capital is presented through a limited boundary model of overlapping generations. The character of equilibrium trail and its economical meaning are examined. The study on the model shows that laissez faire economy will be either stagnant,growing,or collapsing in the long-run,depending on the returns of the learning technology with respect to the two kinds of capital,the initial state of economy,and the relative price of the environmental and consumption goods. 相似文献
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Mathematical model of power frequency electric field is established based on Charge Simulation Method(CSM) to analyze power frequency electric field caused by EHV lines with overhead ground wires and its effect, which are entering the megalopolis. Calculative method on the electric field under the transmission lines is analyzed and validated. According to the criterion of environmental evaluation, the distributing characteristic of electric field is summarized, in case of various arrangement manners of lines. At last, some advice and methods of eliminating electric field under the transmission lines entering the megalopolis is proposed with regard to protecting environment. 相似文献
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JIA Yan-yan 《保鲜与加工》2004,(2):106-109
In this paper, the problems of bringing natural resources and environmental condition into accounting are discussed and lay emphasis on object measurement, imaging and disclosure in accounting report of environmental accounting. The author suggests that the environmental accounting is the necessary production of global economy for sustainable development in modern society; it is also a new ecological accounting subject formed by the result of environmental economies and accounting penetrating into each other. As a contribution of accounting circles to sustainable development, environmental accounting has become a hot topic in recent years. 相似文献
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Gao Shixian 《保鲜与加工》1988,(3)
The problem of fuzzy evaluation of environmental pollution is importantboth in environment science and in environmental protection.Usual evaluationmethods have their own characteristics.This paper puts forward a mathematicalmodel of fuzzy evaluation method in grades by means of systematic analysisfor environmental pollution.At the same time,it assigns weighted values byordering based on paired comparison. 相似文献
59.
基于环境费用-效益分析的农村户用沼气池效益分析 总被引:6,自引:0,他引:6
利用环境经济学中环境费用-效益分析的原理和方法,对农村户用沼气池的效益进行分析和计算,并且将环境效益考虑在内进行分析,结果显示户用沼气池建设有显著的效益. 相似文献
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