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Multi-objective decision-making fuzzy set theory in the economic evaluation of deposits

r ~ j - giΣ (a 6] (a 1,2, ..., n). (2) type (2) the multi-objective fuzzy decision making model. 3 application example of a gold deposit because of its geological characteristics,[link widoczny dla zalogowanych], ore processing technology performance and the special natural and economic and geographical conditions, determine its mining, elections, the rule of multiple programs. According to the experimental results of the design department, total of 12 mining Xuanye technology options. the economic benefits of the program , resources and social benefits aspects have their advantages and disadvantages, it is difficult to determine which one or more programs is better. The following multi-objective fuzzy decision model with to solve this problem. He cicada Science 1: multi-objective decision model adopted pavilion Set Theory in the economic evaluation of deposits in selected index should follow the basic principles: completeness, computability, and minimum of non-repetitive. In view of this, select the gross profit, net present value, the financial internal rate of return, the National Eight received net value added, for the exchange rate, employment effects,[link widoczny dla zalogowanych], the degree of resource utilization and environmental impact of a total of eight indicators to evaluate each program's cost, resources, and social benefits (Table 1). through appropriate indicators of transformation have membership matrix ( Table 2). this membership matrix as input,[link widoczny dla zalogowanych], through a multi-objective fuzzy decision model to be superior vector matrix (Table 2). Congyou vector matrix X and the program can be seen in the evaluation of the program four more gold atlas】 sprouts Characteristics of target indicators of access Ao ■ Decision Matrix gold mine in 1999 the highest (O.9947 and 0.9853). program is a joint four mining method, the product is flotation concentrate, mine construction in two phases, the production scale of 1000t / d. The program actually one of the original gold mine planning and design of some of the ideas. program X is the use of underground mining, ore flotation products,[link widoczny dla zalogowanych], mine construction in two phases, the production scale 1000td economic point of view alone,[link widoczny dla zalogowanych], the program Four is better, but the economic, social, resource and other environmental benefits into account, the program X is better. After much consideration, the production design department to finalize the adoption of the program ten, and later production practice has fully proved its overall efficiency is better