Welding robot has played an extremely important role in the welding production of high-quality, high-efficiency. The paper designed the hardware structure and software of spot welding robot. The hardware design mainly includes the major modules of arm and base; the…

In this paper, DEA model and AHP model combined with a new method to evaluate the performance of the small and medium enterprises. In this paper, mainly introduced the analytic hierarchy process（AHP）and data envelopment analysis ( DEA ), based on the existing on the small and medium-sized enterprise performance evaluation methods are analyzed, finally, through empirical analysis that the method of DEA based on AHP and has good applicability and feasibility. 

A new method of tracking the near space hypersonic vehicle is put forward. According to hypersonic vehicles’ characteristics, we improved current statistical model through online identification of the maneuvering frequency. A Monte Carlo simulation is used to analyze the performance…