In the process of English translation, traditional interactive English translation system is not obvious in English semantic context. The optimal feature selection process does not achieve the optimal translation solution, and the translation accuracy is low. Based on this, this paper designs an interactive English Chinese translation system based on a feature extraction algorithm. By introducing the feature extraction algorithm, the optimal translation solution is selected, and the semantic mapping model is constructed to translate the best translation into English Chinese translation. The real experiment results show that the interactive English Chinese translation system based on feature extraction algorithm can get the best solution.

Effects of solid grains with different concentrations on cavitation evolution around NACA0015 hydrofoil were investigated. The concentrations were 5%, 10%, and 20%. Variations of averaged lift and drag coefficients and lift-drag ratio under all concentration conditions were analyzed; corresponding evolution processes of cavitation bubbles were discussed. Results indicated that with the growing of the concentration, averaged lift coefficient decreased, averaged drag coefficient increased, and lift-drag ratio reduced. They were less than their counterparts in pure water cavitation flow. Cavitation bubble evolution process and distribution of streamlines were various under the effects of the concentration. With the growing of the concentration, shedding dominant frequency and Strouhal number decreased.

Silt particle abrasion characteristics of the centrifugal pump were numerically investigated. Mean diameter of the employed silt particles was 0.025 mm and the concentration was 1%. Results indicated that for diverse pressure and suction surfaces, distributions of silt particle mass concentration were various. The distribution scope on suction surface was larger than that of the pressure surface. Silt particle abrasion rate on suction surface was greater than in the pressure surface. They were alternation change. The laws on suction surface were contrary to that of pressure surface. The investigations could provide theoretical supports for engineering applications in hydraulic machinery engineering fields.

Numerical simulations on effects of diverse silt particle concentrations on cavitation evolution in the centrifugal pump were performed. It was silt particle-water cavitation flow. The concentrations employed were 1%, 5%, and 10%. Evolutions of cavitation bubbles and streamlines and variations of head were studied. Results indicated that under the cavitation number of 0.55, cavitation evolution degree under the concentration of 1% became stronger than in pure water cavitation flow (PWCF); for 5% and 10%, the degrees were weaker than that of PWCF. Streamlines were more disorder and corresponding regions were larger for 1% and 10%; for 5%, they had contrary variations. Head increased first and then, decreased. At the cavitation number of 0.11, cavitation evolution degree under all concentration conditions were more intense than in PWCF. With the concentration increase, cavitation evolution degree was stronger; streamline disorder degree was more intense and corresponding regions were larger; head decreased steadily.

Effects of different particle concentrations on cavitation development in the Venturi tube were experimentally investigated. The concentrations selected were 0.5%, 1.0%, and 1.5%. High-speed camera was used to observe shapes of cavitation bubbles and distributions of particles. Analyses on cavitation development degree at T 0 ms, T 0 + 30 ms, and T 0 + 91 ms moments were performed to determine the role of concentration. Results indicated that particles distributed in cavitation regions, which showed that they had a close relation with cavitation development. Cavitation regions became larger steadily with time. Under different moments, effects of the concentration on cavitation evolution were various. At T 0 ms moment, cavitation evolution was steadily promoted with the concentration increase; for T 0 + 30 ms and T 0 + 91 ms moments, cavitation development degree became more intense first and then, was weaker.