Advanced Materials Research Vols. 791-793

Abstract: Embedded wavelet image coding algorithm has excellent localization property in time domain and frequency domain. To some extent, it can fix position for graphic information which has different direction features to any precision level. At the same time, with the disappear of blocking effect and noise, it is able to perfectly match with the visual features of human beings and it has quickly become one of the hot research direction in the field of image processing. This paper firstly defines the wavelet transform and elaborates the principle and connotation of embedded wavelet algorithm. And then, this paper reconstructs the image wavelet. On the basis of this, wavelet algorithm is transformed in frequency domain. At the same time, this paper constructs the image fusion model which is based on embedded wavelet image coding algorithm and further applies the edge detection and image fusion of the model to the track route. Analog simulation is also made in the application of the algorithm and the effect of real virtual composite is obvious. To some extent, it provides new exploration ideas and practice path for the research in this field.

Abstract: In this paper, we conduct a comprehensive survey on the past developments and recent advances of bilevel programming models, algorithms and practical applications in urban transportation network design problems. Moreover, based on this survey, some open problems and future research directions are proposed.

Abstract: The location routing problem (LRP), which simultaneously tackles both facility location and the vehicle routing decisions to minimize the total system cost, is of great importance in designing an integrated logistic distribution network. In this paper a simulated annealing algorithm (SA) based hybrid genetic algorithm was developed to solve the LRP with capacity constraints (CLRP) on depots and routes. The proposed hybrid genetic algorithm modified the population generation method, genetic operators and recombination strategy and realized the combination of the local searching ability of SA and global searching ability of GA. To evaluate the performance of the proposed approach, we conducted an experimental study and compared its results with other heuristics on a set of well-known Barreto Benchmark instances. The experimental results verified the feasibility and effectiveness of our approach.

Abstract: This paper discusses reliability evaluation and management in simulation systems. An evaluation methodology is proposed first that can be used to assess the reliability of simulation models, following which evaluation methodology and evaluation procedures are described. As the application of reliability principles has also become a trying management task, reliability management is discussed at length which is divided into four parts: related responsibilities, guidelines, tasks in the life cycle and reliability auditing and pitfalls.

Abstract: The method to set up visual environment of flight simulation was studied with Open Scene Graph (OSG) technology, and it includes the method and steps to build three dimensional digital earth, the method to read out airport and aircraft model, the method to simulate meters in the cockpit of an aircraft, and the method to simulate an aircraft fly in the visual digital earth environment, etc. Then software was written in VC++ based on the methods and steps given in this paper. The running results of the software in a personal computer shows that OSG technology can build up realistic simulation environment of flight visualization, and it is very helpful to realize realistic feeling and immersion of flight vision simulation of an aircraft in three dimensional digital earth.

Abstract: With the widely use of discrete problems in production scheduling, traffic control, logistics, management science and social science, the restraint of the integer solution to the discrete problem, adding to the difficulties. In this paper, knapsack problem as an example, the computational accuracy and computation in the next, studied the design and analysis of algorithms for solving discrete problems.

Abstract: With the rapid development of computer technology and software technology, the application of linear canonical correlation analysis is more and more widely. But in practical applications, variables are often potential nonlinear relations. Therefore, it is necessary to study the nonlinear canonical correlation analysis algorithm, reveal the nonlinear relationship between variables of potential.

Abstract: The Capacitated Arc Routing Problem is a typical combinational optimization problem, and traditional optimization methods produced premature convergence problem. Artificial immune algorithm, which simulates biological immune system, is a new intelligent optimization algorithm with good global search capability. This paper proposes AIA to solve the CARP and produces the process and steps for this algorithm. Experiments show that this algorithm can get better solution.

Abstract: In order to significantly improve the load capacity of the soldiers and the maneuverability as carrying heavy loads, the mechanism design and simulation of the wearable exoskeleton robot are studied in this paper. Firstly, the mechanism design of the exoskeleton robot is completed and the three-dimensional model of the exoskeleton robot is established. Then, the five-link mathematical model of the exoskeleton robot is established, the dynamics analysis of which is proceed. Finally, through using virtual prototype technology, the walking simulation of the robot is carried out and the results provide a basis for the future work.

Abstract: With the development of computer hardware and software, the simulation of computer virtual simulation has been rapid development. The running process of computer simulation platform need to deal with massive data, and in general software testing technology can not meet the requirements. On the basis of this, an application computer virtual platforms parallel test method is proposed. Firstly, this paper gives a brief introduction for the process of computer simulation, and then the testing method can carry out software programming, it will realize the virtual process of serial FIFO buffer and register through reading and writing function. In order to develop basketball virtual platform as an example, the use of Simulink modules in MATLAB compare the serial and parallel testing of two testing methods used by software debugging time. Finally, we find that the parallel test is the best scheme of computer virtual platform software test, to provide theoretical reference for the design of software testing process.