Applied Mechanics and Materials Vol. 392

Abstract: In this paper, we discuss the hybrid difference scheme on the Shishkin mesh for the singularly perturbed problems in 2-D. The ε-uniform pointwise convergence is proved by the comparison principle and barrier functions. The experiments support the theoretical result.

Abstract: Traditional Weibull distribution is unable to model the complete lifetime of systems with a bathtub failure rate function. As a consequence, a new model is quoted in this paper, in which the conditions of models with bathtub failure rate function failure mechanism and the method to determine acceleration factor are discussed in detail. Furthermore, I make an example by using the best overall unbiased estimation to illustrate the method. In addition, parameter range of the acceleration factor is given at last.

Abstract: A new four-dimensional chaotic system is presented in this paper. Some basic dynamical Properties of this chaotic system are investigated by means of Poincaré mapping, Lyapunov exponents and bifurcation diagram. The dynamical behaviours of this system are proved not only by performing numerical simulation and brief theoretical analysis but also by conducting an electronic circuit implementation.

Abstract: A new four-dimensional chaotic system is presented in this paper. Some basic dynamical Properties of this chaotic system are investigated by means of Poincaré mapping, Lyapunov exponents and bifurcation diagram. It is a new phenomenon that the phase plane attractors can achieve opposite and topology of exactly by changing the parameter symbol of c.

Abstract: A new three-dimensional chaotic system is presented in this paper. Some basic dynamical Properties of this chaotic system are investigated by means of Poincaré mapping, Lyapunov exponents and bifurcation diagram. The dynamical behaviours of this system are proved not only by performing numerical simulation and brief theoretical analysis but also by conducting an electronic circuit implementation. It is new physical phenomenon that the Poincaré mapping of this system is a group of parallel lines.

Abstract: Experience and knowledge play a very important role in design; however, experts experience and knowledge are difficult to impart effectively and precisely to novices. Artificial intelligence (AI) approaches have been successfully applied to many fields. Among the numerous AI approaches, Case-Based Reasoning (CBR) is an approach that mainly focuses on the reuse of knowledge and experience. However, little work is done on applications of CBR to improve assembly part design. Similarity measures and the weight of different features are crucial in determining the accuracy of retrieving cases from the case base. This research presents a Case-Based Reasoning (CBR) system, CBR-DFA, consisting of a complete CBR cycle to retrieve and evaluate an assembly part design. Experience and knowledge in the form of suggestions include qualitative and quantitative information offered to novices by retrieving and adapting a similar case. Early experimental results indicate that the similar part design is effectively retrieved by these similarity measures.

Abstract: In this paper, we deal with multidimensional backward stochastic equations (BSDES) driven by continuous semi-martingale. We first obtain the existence of solution for this kind of BSDES with locally Lipschitz coefficient, which generalizes the corresponding results in Khaled Bahlali.

Abstract: This paper studies the stabilization control method of based on the ship rocking information of navigation equipment, analyzes the self-stabilization model,puts forworad a ship rocking data filtering method based on the UKF,designs the LOS stabilization control system of a certain shipborne electro-optical equipment and analyzes the stabilization control system precision and isolation by the simulation method.

Abstract: Navigation is a key technology of mobile robot. The information of path planning for navigation is always incomplete in dynamic time-varying environment. In this paper, based on grid environmental model, an improved algorithm of path planning is proposed combining ant colony optimization with rolling window for an unknown complex environment with obstacles. A sub-target point can be searched within a rolling window according to the heuristic information about a target point, the improved algorithm can plan a local optimal path for the mobile robot in a rolling window. Simulations show that the improved method is feasible for path planning in an unknown environment.

Abstract: The unmanned aerial vehicle (UAV) aerial technology increasingly been widely used and attention, this paper first describes the cause of geometric distortion of aerial image, and then using Denavit-Hartenberg (D-H) theory on the flight attitude change of the UAV has led to the phenomenon of image distortion analysis, and the establishment of corresponding image geometric correction model. The terrain is relatively flat areas near a school in Guilin as an aerial target area, geometric correction processing the acquired aerial imagery, experimental results show the effectiveness of the method.