Search

Because of a vast amount of business process, difficult tracking, low turnover efficiency, processing of logistics management information behind time and with antiquated means, the application of advanced RFID technology in the field of logistics and storage management is proposed to solve the above problems on the basis of analyzing the shortages. In this paper, the logistics warehouse management information system based on RFID is conducted. The working flow and process structure of the logistics and storage arc given on the basis of analysis of the traditional logistics and storage service flow. The integral framework of the logistics and storage service system based on RFID technology is established. This thesis mainly does research about the pattern of RFID application in warehouse, the system framework and the information flow. On the base, it designs the information system and realizes its function module.

A 7.8m/s vertical drop simulate of a full composite fuselage section was conducted with energy-absorbing floor to evaluate the crashworthiness features of the fuselage section and to predict its dynamic response to dummies in future. The 1.52m diameter fuselage section consists of a high strength upper fuselage frame, one stiff structural floor and an energy-absorbing subfloor constructed of Rohacell foam blocks. The experimental data from literature [6] were analyzed and correlated with predictions from an impact simulation developed using the nonlinear explicit transient dynamic computer code MSC.Dytran. The simulated average acceleration did not exceed 13g, by contrast with experimental results, whose relative error is less than 11%. The numerical simulation results agree with experiments well.

The paper discussed the minimum level of passenger demand which could make intercity railway project social profitability in China. The analysis of the costs and benefits linked to other alternative transport modes has been taken into account. The results show that the intercity railway studied is socially profitable with a demand of 4.07 million passengers and a social discount rate of 7%, and the conclusion also applies to other intercity railways in China with similar line conditions and regional economic level.

Traditional INS/GPS integrated system would degrade sharply when GPS outages, a new method is proposed in this paper, which is a NN(Neural Network) aided KF (Kalman Filter) integration method.The structure of the method was shown summarily, the NN and KF design flow was discussed briefly, test experimentations have been done to prove the availability of the proposed method. Primary test results have shown that the proposed method can reduce the navigation solution during GPS outages, by about 70%, in comparison with INS stand alone results in GPS outage of 60 seconds.

The media access control (MAC) protocol based on fixed slot allocation has low throughput and high delay in high load wireless mesh network. In order to improve the performance of wireless mesh network, we propose a scalable adaptive time division multiple access (TDMA) slot allocation algorithm based on the existing fixed TDMA. The algorithm uses the network structure of clustering and builds a more optimized frame structure, cluster head dynamically allocates time slot according to the packet number of the cluster member sent and the priority level, at the same time taking into account the situation of nodes joining and leaving to improve the scalability of the network The simulation results on OPNET network simulation platform show that the algorithm is superior to fixed TDMA algorithm in both throughput and delay.