Papers by Author: Tong Rang Fan

Abstract: In order to solve the problem of Enterprise employees’ access to motor parameter anytime, anywhere, understand the work state of motor. We apply the WAP related technologies, design motor parameters test based on WAP system, meanwhile, we give the function modules design, software architecture, the key technologies of system realization as well as some problem-solving methods.

Abstract: To address problems of Least squares method (LSM) fitting curves in application domains, the essay attempts to build a new model by using LMS (Least Median Squares) to analyze the error points, and pretreating the dynamic measuring errors and then getting the fitting curves of testing data. This model is used for electromotor parameters testing which includes load testing and unload testing. Experiments show that the model can erase the influence of outline points, while improving the effects of data curve fitting and reflecting the characteristic of the motor, provide more accurate data fitting curve with small sample data that is in discrete distribution compared with Least squares method.

Abstract: The current research in access control is analyzed, and the features of access control in collaborative design systems are discussed. According to the new requirements of the access control technology in collaborative design systems, the attribute-based access control (ABAC) model is improved to a new one: supporting role and task ABAC model. The concept of role entity and task entity is introduced into the ABAC model. The formal definition and object model of the improved model are given, and the features of the newly-introduced model elements are discussed.