Applied Mechanics and Materials Vols. 155-156

Abstract: The article focused on the study of the ATM of Industrial and Commercial Bank in Qinhuangdao. To achieve the purposes of improving customers’ satisfaction and optimizing the allocation of resources, the article calculated some major quantity index including average queue length and waiting queue length, average waiting time and sojourn time as well as utilization rate of the system, analyzed ATM working efficiency of queuing system and gave some suggestions for improvement.

Abstract: This study proposes a multi-attribute decision making based approach for product design concept evaluation and selection. The technique for order preference by similarity to ideal solution (TOPSIS) is combined with fuzzy sets and information entropy. While the fuzzy sets theory is employed to capture the associated vagueness in the expert judgment, the combination of information entropy method with multi-attribute decision making makes the approach computationally efficient. We present the results of the evaluation of design concepts which demonstrate the feasibility and practicability of the approach. The proposed approach will result in considerable time and cost saving by identifying the most promising product design concepts and short-listing for further design and development activities.

Abstract: Aerobics can through the big load workout, consumption of excess fat in the body, the body form and body composition have greatly improved, and this can help shape and size of the strong and handsome youth healthy physique. The author through the contrast experiment method to young students body composition and cardiopulmonary function measurement, in order to understand the aerobic exercise to young students' physical effects. The results showed that after aerobic exercise of young students measurements close to our country race standards; BMI, WHR, body fat rate are significantly lower; Cardiopulmonary function increase apparently.

Abstract: This paper adopts finite-element method to analyze and test the factors which influence the brake shimmy. Based on the prototype of a particular heavy truck, finite element model of the brake shimmy about drum brake is developed upon the mechanism analysis of drum brake. The reasons that drum brake has oscillation phenomenon during braking process is analyzed by simulation and calculation the transient response in this process. Tests indicate that results of finite element analysis are consistent with the conclusion of real vehicle road test.

Abstract: Image Matching is a key technology in the intelligent navigation system for the blind, which is based on the computer video. The images of moving blind people, collected at real time, have variety of changes in light, rotation, scaling, etc. Against this feature, we propose a practical matching algorithm, which is based on the SIFT (Scale Invariant, Feature Transform). That is the image matching algorithm. We focus on the algorithm of the SIFT feature extraction and matching, and obtain the feature points of the image through feature extraction algorithm. We verify the effect of the algorithm by selecting practical images with rotation, scaling and different light. The result is that this method can get better matches for the blind road environmental image.

Abstract: Unsteady CFD method based on realizable k-ε model is used for predicting unsteady forces of propeller working in non-uniform inflow. CFD method was firstly validated by cases of propeller P4118 in 3-cycle and 4-cycle inflow. The influence of the little difference between experiment and CFD flow field on propeller unsteady forces was estimated by 2D unsteady method which has been proved to be correct. The results of CFD agree well with experimental data. Then several propellers with different blade thickness are simulated, the results show that, as a whole, average thrust, torque and unsteady forces decrease slightly as blade thickness increases.

Abstract: Having already carried on on-line examination under the network environment several years of history, regardless which kind examines it is ,the problems is divided into objective and subjective. It have been very mature to Automatically grade examination papers in the objective by database technique For automatic checking over subjective examination, its procedure involves some restriction theory and technique development,such as artificial intelligence, natural language comprehension and mode identification etc., So far, there is no accepted system.This paper put forward to the research direction of the algorithm in automatic checking over subjective examination by analyzing the present condition for grading examination papers.

Abstract: To investigate the response of PCL rupture on the biomechanics of cartilage and menisci, the MRI images of normal human knee at various flexion angles(0°,25°,60° and 80°)were developed 1.5T and the intact and PCL deficient knee models were built based on these images. Then three different loads were applied on these models for the finite element simulation to obtain the von Mises equivalent stress of cartilages and menisci and the reaction force among them. Based on the four flexion angles finite element simulation in ANSYS11.0, we drew the conclusions that: (1) the reaction forces and equivalent stresses were sensitive to PCL deficient at 0° and 60° degrees, (2) The reaction force and equivalent stress of the lateral components increased at 0° and 60°, while the medial components increased at 0 degree and decreased at 60 degree after PCL deficient.

Abstract: The excellent braking characteristics is a key security measure for automobile operation. Braking system is used in modern automobiles for enhanced safety and reliability. During automobile design stage, a full model of automobile is established in ADAMS software circumstance in according to structural feature and main parameters. The article focuses on modeling and parameter settings of brake system, tire system and body system. Based on the requirement of country standard and national standard, the braking performance analysis and appraise is carried out in this study, at the same time, the braking performance is optimized.

Abstract: Abstracting underwater target azimuth tendency feature is a common method to identify underwater target dimension. The cross-spectrum method of splitting beam is often used to abstracting underwater target azimuth tendency feature. But when the SNR is very low, this method is inefficient. In this thesis, an improved algorithm is presented to abstract underwater target azimuth tendency feature which can be used in the low SNR. In the algorithm, the underwater target highlight structure feature is used, and by least square fitting twice the underwater target azimuth tendency feature will be finally obtained. The simulation experiment results show that the proposed algorithm can be used to abstract underwater target azimuth tendency feature even when the SNR is very low. The improved algorithm has made an important foundation for further studying the feature detection and recognition of an underwater target dimension.