In order to research the effect of different cutting orders on breaking mechanism of TBM cutters for the rock without joints, this paper established the simulation models of breaking rock three TBM cutters in simultaneous and sequential orders, which is based on the 2D discrete element method. A series of numerical experiments were designed and the whole process of production and propagation of crack and rock breaking was successfully simulated. The simulation results showed that the cutter order determines the breaking mode, which is carefully analyzed: The chipping stress under the sequential order is higher than simultaneous way. The chips are formed by the side cracks under the two loading modes, while the shape of the rock chip are different. The distribution of the principal stress contour is almost symmetrical in different cutting order. Finally, conclusions and future work are summarized.

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This paper focuses on the research of the de-noising of the passive sonar based on the Gabor. Based on the modeling and simulating of the underwater robot about ship radiated noise, this paper analyzes and compares the effect of de-noising of the passive sonar of ship radiated noise. It is shown that better de-noising effect are achieved by using the Gabor method. This method have a significant foreground in de-noising of passive sonar.

The Key of Web Services lies in how to describe and find Web serve, and which is mainly realized depending on UDDI technology is realized. The company which provided the services by UDDI can register information, it can make the potential user and/or cooperative partner find the services and simple shelf of the business of these companies. At the same time, UDDI can make company find other company, so as to expand the potential business partnership. We can say UDDI has offered the chance for company to step into new market and service, also make the companies in all scales expand their own place business among the global market rapidly.

Research for algorithm of non-preemptive scheduling on multiprocessor is of great theoretical significance and practical significance. Based on non-preemptive scheduling, the performance of the algorithm is analyzed and investigated on two different objective functions about the turnaround time of the system and the low-cost problem with a limitation of time. Finally, the relevant conclusion is obtained which is the basis of the further research. It gives a guarantee to the algorithm performance which is designed for the practical application.