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In paper the fuzzy matrix equation AX+XB=C is investigated. The fuzzy matrix equation is converted to a fuzzy linear system. Then the fuzzy linear system is extended into a crisp system of linear equations. The fuzzy approximate solution of the original fuzzy systems is derived from solving the crisp function linear equations. An example is given to illustrate the proposed method finally.
A new kind of multi-resources leveling model with changeable resource intensity is presented in this paper. Prolonging of activity duration is allowed in order to decrease resource intensity of activity in this model. A dimensionless variable named as duration prolonging rate is introduced to show the prolonged degree of activity duration. Time constraints among activities can be automatically satisfied...
In this paper, a class of semi-fuzzy matrix equation Ax = B is investigated. The original fuzzy matrix equation is extended into a crisp matrix equation SX =Y(r) and the solvability of the crisp matrix equation is also discussed. Then the undetermined coefficients method for solving the crisp matrix equation is designed in detail. Finally, an example is given to illustrate the proposed method.
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