出版社：Canadian Research & Development Center of Sciences and Cultures
摘要：In this paper, we propose the schedules designed for different tour trips along the Big Long River. We build three models on the basis of the characteristics of drifts, that is: the model based on maximum effective coefficient, the model based on optimization the utilization of the camping sites, the model based on the distribution of camping sites for motorizes boats. According to our analysis, there are certain relationships with the number of tourists on the river at present, the number of newly-launching tourists, the number of tourists finishing their journey and the number of previous tourists on the river. Making use of the method of iteration, we construct the model based on maximum effective coefficient to maximum the effective coefficient and to reach the minimum contact. Introducing 0-1 variables ant colony algorithm, total launching tours every day, the transport choice and each tour group sailing days are available.
其他摘要：In conditions of capital constraints, a single-objective nonlinear 0-1 integer programming model is proposed based on grey theory. First, application of Grey Theory deals with uncertainty of attribute weights’ values given by experts and projects’ scores under different attributes. Second, we construct two multi-attribute utility objective functions by comparing situations of considering interactions and without interactions, and two new multi-project portfolio optimization models are established. Finally, a numerical example illustrates effectiveness and practicality of the proposed model.
