The adaptive power management strategy is developed for a four-mode plug-in hybrid electric vehicle in this paper. For a given driving pattern, dynamic programming is employed to obtain the global optimum as the performance upper bound to benchmark the proposed strategy. A selforganizing fuzzy controller is used to adaptively adjust the equivalence factor for converting the electric power usage...

Because of the serious non-linearity and coupling among state variables caused by the complex energy conversion process in ultrasonic motor, the motion control strategy of ultrasonic motor still need to be studied in detail to obtain better performance. As a kind of special control method, the low-frequency PWM control strategy can make the on-line optimum control easier, and may be an effectiv...

This paper presents a Multi-MetaHeuristic combined Ant Colony System (ACS)-Travelling Salesman Problem(TSP) algorithm for solving the TSP. We introduce genetic algorithm in ACS-TSP to search solutions space for dealing with the early stagnation problem of the traveling salesman problem. Moreover, we present a new strategy of Minimum Spanning Tree (MST) coupled with Nearest Neighbor(NN) to const...

This paper presents a novel approach for mobile phone centric observation of a user’s facing direction, relying solely on built-in accelerometer and magnetometer. Our approach achieves greater accuracy and independence by an automatic detection of the wearing position of the mobile device on the user’s body and subsequent selection of an optimum strategy for estimating the user direction. We re...

This paper presents a soft computing strategy to determine the optimum die openings of parison programming of extrusion blow molding process. The design objective is to obtain a uniform thickness of blown parts. The proposed strategy, Fuzzy Neural-Taguchi, first establishes a back propagation network using Taguchi’s experimental array to predict the relationship between design variables and res...

An effective warranty servicing strategy should be made considering both warranty cost and product availability. Based on the two-dimensional free repair warranty, a strategy combining the imperfect preventive maintenance and minimal repair is proposed where the imperfect preventive maintenances are implemented in a special subregion of the warranty and all other failures are repaired minimally...

This paper undertakes the problem of Design Centering and Tolerancing (DCT). This subject plays important role in design of analog circuits. Practically it is impossible to obtain the optimum solution by mathematically described computational methods, and the problem is numbered to NP-difficult category. Optimum nominal values and tolerances of analog circuit parameters such as resistance, capa...

The determination of the “optimum pit limit” of a mine is considered to be a fundamental problem in mine planning as it provides information which is essential in the evaluation of the economic potential of a mineral deposit, and in the formulation of long-, intermediate-, and short-range mine plans. A number of mathematical techniques have been proposed to solve this problem, some of the more ...

The evaluation of operations number for the system design has been done for general design strategy. More general methodology for the system and circuit design was elaborated by means of optimum control theory formulation. This approach generalizes the design process and generates infinite number of the different design strategies. The main equations for this general design methodology were ela...

The focus of this paper is on developing ways to evaluate teaching performance on a regular basis as a means of improving teaching effectiveness and increasing student learning in the classroom. In particular, this paper shows how an instructor-developed pretest, when given at the start of an introductory economics course as part of a preand post-test strategy, can be used as a diagnostic and d...