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The TiO2 films with hierarchical structure consisting of porous structure and spinodal phase separation structure have been synthesized by sol-gel method. The influence of the different photomonomers, different coating times and different heat treatment temperatures on the structure and photocatalytic activity of TiO2 film has been investigated and the possible mechanism was proposed. The performances of as-prepared TiO2 films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD). The photocatalytic activities of the as-prepared TiO2 films have been carried out by the degradation of methylene blue (MB) dye under the UV irradiation. The results indicated that the as-prepared TiO2 film with hierarchical structure exhibited significant photocatalytic activity, which might be due to its high specific surface area and high-speed electron migration that enhanced the subsequent photocatalytic reactions and led to a positive synergistic effect.

The plasma spraying Al2O3-13%TiO2 (abbreviated as AT-13) ceramic coatings on Q235B steel surface were dealed with laser remelting technique. The microstructure and properties before and after laser remelting were studied. Experiment results shown that the microstructure of laser remelted ceramic coatings was dense, no porosity appeared. The main compositions of laser remelted ceramic coatings were α-Al2O3 and a small amount of TiO2 and TiAl2O5. Microhardness of AT-13 plasma spraying coatings and laser remelting coatings were measured with vickers, and the maximum microhardness value of the former was 1000 HV0.2 , while that of the latter was 1700 HV0.2; The average bonding strength value of AT-13 plasma spraying coating was 24.36 Mpa, while the average bonding strength value of laser remelting coating was more than 67.02 Mpa. The wear resistance of laser remelting coatings was higher than that of AT-13 plasma spraying coatings through the pin-dish particle wear test.

In this paper, based on Ansys the deformation and stress for high pressure long cylindrical natural gas storage tank are analysed. And obtain the stress distribution of the storage tank. The changes of stress are analysed in thickness direction and along the rigid wall. The results and theoretical results are accordance. On this basis, the modal analysis of tank is completed too. Obtained the tank various order natural frequency and vibration mode. The calculation results show that the method is effective and provide the theoretical basis for high pressure tank design

In this paper, based on ANSYS the topology optimization design for high pressure storage tank was studied by the means of the finite element structural analysis and optimization. the finite element model for optimization design was established. The design variables influence factors and rules on the optimization results are summarized. according to the calculation results the optimal design result for tank is determined considering the manufacturing and processing. The calculation results show that the method is effective in optimization design and provide the basis to further design high pressure tank.

Traction load in electrified railway result in the power supply system contains a lot of negative sequence, harmonic and reactive current. It is necessary to analysis the compensation principle based on active compensation of electrified railway traction power supply system. According to the relation between primary winding and secondary winding of regular traction transformer, we deduced general voltage and general current transform formula, and then deduced completely and negative sequence compensation formulas. It also gives the method of reduce active compensation capacity.

The performance advantages of the newly full-hydraulic internal circulation two-platen injection molding machine were investigated deeply and comprehensively. The application prospects were also forecasted. Thanks to the use of internal circulation cylinders in the injection molding machine, the hydraulic system is greatly simplified. Mold-moving and mold-locking are actuated by different cylinders respectively which not only balance the force and velocity but obtain excellent mold-locking properties and high molding stability. The injection molding machine was equipped with servomotor which drives quantified pump in order to save energy and lower noise. The newly full-hydraulic internal circulation two-platen injection molding machine will be the next generation injection molding machine.

This paper introduces the basic theory and significance to study injection molding defects. By virtue of the visualization experimental equipments, generation processes of several typical defects are directly observed and recorded. The generation mechanism of these defects is analyzed. Finally future study plan is advanced.