Research on Influence Evaluation Based on RkNN and Its Application in Location Problem

摘要

The influence of spatial position means how deep it affects the spatial objects and can be measured by the number of affected spatial objects. The evaluation of spatial position influence which widely used in architectural planning and facility location is a typical study in the spatial database. In previous studies, a spatial object was supposed to affect only one spatial position, the influence of the object calculated by the number of the space objects in the area. However, the spatial object can affect many spatial positions and the effects are multiple. In this study, we provide a new evaluation model based on RkNN. A new measurement method was proposed by calculating the weight of the contribution based on the distance between the space object and the space position. The new measurement method makes the model more suitable for the practical application. In addition, a location algorithm was proposed based on the RkNN influence evaluation model. The algorithm can solve the problem such as making the facilities to provide the best service to the customers and using each facility effectively. The influence of each facility is calculated in this algorithm and the rationality of the location scheme is evaluated by equilibrium coefficient, the smaller the equilibrium coefficient, the more reasonable the scheme. The location algorithm based on the new model shows a better performance in the practical application, it contributes to the more reasonable and effective facility location.