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Geotechnical engineering in tension damage is one of the major failure modes. For a long time, Brazil test has practical significance and wide application value that has been used to determine the tensile strength of rock. When the specimen center destroyed tensile stress play a major role that is the theoretical basis of Brazil test. This is uniaxial tensile stress state, but the reality is complex stress state. Theoretical analysis shows that the Brazilian test does not truly reflect the tensile strength of rock, its test results to error. In this paper, two-parameter parabolic Mohr strength criterion for this error analysis, and propose amendments to the formula.

This paper simulates the impact of industrial development on the manufacturing from the perspective of sustainable development. We discussed the industrial development and environmental changes and the results show that industrial waste and pollution levels are gradually slowing down towards improvement, the results show that the reducing the amount of industrial wastewater discharge may strengthen the implementation of environmental policy and industrial wastewater treatment investments related, and there are signs of a rebound and volatility.

The national partner countries through international trade on manufacturing engineering and engineering technology advances have different degrees of impact, the paper analyzes the development of China's manufacturing variations and export trade, and then from theory to explain the import, export trade on TFP the impact mechanism. Finally, this industry grouping, according to manufacturing industry technical standards, industry size compared regression results are grouped reasons for the differences. Empirical analysis based on the main conclusions drawn papers and put forward relevant policy recommendations.

This paper suggests an improved genetic algorithm to seek the minimum range value in the ideal-plane flatness measurement. This algorithm increases measurement accuracy by using dynamic cross factor, mutation factor and a new concept called chromosome fitness. It was proved in simulation experiments that its accuracy is better than other flatness error evaluating algorithms like the minimal territory evaluating algorithm and the computational geometry algorithm etc. So it can be used for measuring industrial production components error and verifying assumed models in reverse engineering etc.