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A multi-objective optimization method for the optimization of the efficiency and weight of helicopter transmission planetary gear train was established. Taking the transmission ratio, efficiency weight, and reliability as critical design parameters, taking the conditions of the planetary gear train itself and the strength check constraint for the gear train as constraint functions, making the weight and efficiency of the planetary gear train asoptimization targets and using the Matlab function fgoalattain, a multi-objective optimization has been made. Comparison between the initial and the optimized results showed the success of the optimized planetary gear train in reducing the weight and increasing the efficiency.

The process of preparation of Fe-Si cores is studied, and the influence of different amounts of insulating compounds addition on magnetic properties of the cores is discussed. The results show that the effective permeability is 71.4 when the amount of insulation is 0.5wt%. When the content is increased to 2.5wt%, the DC Bias characteristic becomes the best. When the insulating compounds addition is 2.5wt%, the sample has the lowest power loss, which is 308.4 mW/cm3at f=50 kHz and B=50 mT.

The aesthetic education and its application to engineering education and personality development are considered in this paper. First, we investigate main reasons causing the weakness of the aesthetic aspect in engineering education. Next, we analyze the important roles of aesthetic education to help cultivate the healthy personality. Finally, we propose concrete strategies of incorporating the aesthetics into the engineering education and the personality development for university students, which are expected to be helpful to improve the effectiveness of the higher education.

In this paper, an intelligent monitoring management system of tower crane is designed based on PLC and WinCC. As the core of tower crane electrical control unit, PLC processes the data from sensors and transmits the operation parameters to WinCC configuration screens for real-time display. The system can give the alarm when overweight, high torque or too large inclination happens, and anti-collision self-learning function is added in the system. The experiments prove that the system can play a good role in tower crane safety protection.

The 0.05%Gd3+ /0.4%Eu3+ co-doped TiO2 composite nanopowders have been prepared by sol-gel method and characterized by the techniques such as XRD, SEM/EDAX. The photocatalytic degradation of Methylene blue in aqueous solution was used as a probe reaction to evaluate their photocatalytic activity. The results show that the 0.05%Gd3+ /0.4%Eu3+ co-doped TiO2 are only structuresd by anatase phase with grain sizes of about 16nm at 540 °C for 4 h. The photocatalutic degradation of Methylene blue was 96.7% in 120 min of irradiation when the pH value was 9.

Based on finite element theory, pillar structure of the model parameters was established, and analyzed its static and dynamic performance. At the same time, the structural deformation of pillar load and deformation characteristics were analyzed. The choosing shape method was used to get the improvements in pillar. The Improved models were done modal analysis, and got their natural frequencies.