Applied Mechanics and Materials Vols. 157-158

Abstract: In this paper, we compare the Differential transformation method and Adomian decomposition method to solve Euler-Bernoulli Beam vibration problems. The natural frequencies and mode shapes of the clamped-free uniform Euler-Bernoulli equation are calculated using the two methods. The Adomian decomposition method avoids the difficulties and massive computational work inherent in Differential transformation method by determining the very rapidly convergent analytic solutions directly. We found the solution between the two methods to be quite close. According to calculation of eigenvalues, natural frequencies and mode shapes, we compare the convergence of Differential transformation method and Adomian decomposition method. The two methods can be alternative ways to solve linear and nonlinear higher-order initial value problems.

Abstract: In this paper, based on geological power division method of qidong well find out fault block coal mine, determined the change law of the ground stress coal mine, combining geological structure distribution situation, distribution, coal seam gas igneous rock and the pressure distribution rule, the structure of coal change situation analysis, USES the many factors in wanhei coal and electricity group coal mine coal layer 3 qidong well of coal and gas outburst prediction area, for mine power phenomenon regional prediction has provided a new way and method.

Abstract: A road background generation and update method that is based on segment statistics is put forward. It is to generate background by image segmentation and statistic of the gray average in each gray segment interval. It realizes background update with the measurement features of adopting the gray average in each segment and the standard deviation, detects and eliminates the stationary vehicles in the background through complexity comparison of the edge. The experiment shows that the generated background has good quality, and can accurately detect and update the area of stationary vehicles in the background.

Abstract: Mice action data is important part of the experimental data in neurology, physiological etc. subjects. A algorithm was proposed on action analysis of mice in this paper. Difference of mice in inter-frame was extracted while the position relationship between mice contours and change information was taken into account. Then K-Means clustering algorithm was used to cluster the information while the cluster center was used as the key frame. In the recognition phase, the similarity measure function was defined according to practical significance of the center of K-Means algorithm, the most similar sample class with it was the result. Experimental results showed that the action analysis algorithm is very effective.

Abstract: In order to improve the efficiency of pattern making based on CAD system for garment, the application of ET2007 CAD system was discussed in the paper. Through in-depth study found that function of its intelligence pen tools is very powerful. Because the tools is very convenient for finding the point inline, so it should be fully used for reducing greatly the steps and improving significantly the efficiency. It is also found that the order of pattern making and the tools used all influence the efficiency. For structure more complex garment, the pattern making on a basic block can also reduce greatly the steps and improving significantly the efficiency.

Abstract: Wireless sensor network is always deployed in specific area for intrusion detection and environmental monitoring. The sensor nodes suffer mostly from their limited battery capacity.Maximizing the lifetime of the entire networks is mainly necessary considered in the design. Sliding the sensors in different barriers under the optimal barrier construction is a good solution for both maximizing network lifetime and providing predetermined coverage ratio. The simulation results demonstrate that the scheme can effectively reduce the energy consumption of the wireless sensor network and increase the network lifetime.

Abstract: In this paper, a novel control approach is presented for a gas turbine. The approach is based on the active disturbance rejection concept, which can design an Active Disturbance Rejection Controller (ADRC) without an explicit mathematical model of the plant. The controller regards the friction and the coupling effects of several main subassemblies as the internal disturbance. And it can estimate and compensate the disturbances using the Extended State Observer (ESO) in the each sampling period. Hence ADRC is robust against the variations of plant. Using the parameters of turbine engine Titan 130 the simulation was developed. Through the results of simulation, it is verified that the proposed approach is superior to the classical PID regulator in maintaining the stability.

Abstract: This paper mainly deals with the influence of the variety of span-thickness ratio of beams on arching action of reinforced concrete frame beams through trial experiment research and theory analyzes.By experimental study and theoretical analysis,limit carrying capacity of reinforced concrete frame beams can be enhanced largely owing to arching action.The larger span-thickness ratio of beams is,the lower arching action of reinforced concrete frame beams and limit carrying capacity is,but the reduction is disproportionate.

Abstract: Based on the definition of rough graph, this paper makes further research on rough properties of rough graph. The concept of edge precision is presented to measure rough properties of rough graph. Furthermore, by using rough equal and rough similarity degree, different rough graphs are compared. Some basic conclusions are presented.

Abstract: A new semi-anonymous non-contact offline mobile payment protocol based on improved concurrent signature is proposed. The customers can keep anonymous to merchants during the regular transactions. However, the merchants can obtain customers’ identity information in questionable tractions from the issuer offline without supervision of a third party. The offline transaction needs two interactions and its benefits include fairness, high efficient and no third party. The new protocol’s fairness has solved the anti-pull problem in offline non-contact mobile instant payment.