Selection of reliability parameters and targets assessment for certain missile turbofan engine

According to the difference of each measuring point of construction equipment,which is over 5dB(A),this paper gives the result that we cannot only use average value,we should regard the surfacing average noise level of a grade as evaluating index.

It introduces the forming and factors of rut,elaborates evaluating index of hi-temperature stability,analyses some ways of solving hi-temperature stability of bitumen mixture,and points out that proper quantity choice is a effective measures of raising its stability.

By experimenting and researching, it is confirmed that regarding uniformity as the evaluating index of mixing performance is not reasonable, and suggestions for the improvement are put forward.

According to the characters of desulfurization,a new desulfurization efficiency index is put forward as an evaluation index for desulfurization process,It is tested by two sets of real desulfurization data.

The factors in connection with the selection of gear precision evaluation index are fully introduced in this paper,and the selection is analysed in detail,which provides the reliable theoretical basis for the correct selection of gear precision evaluation index and assures the design accuracy of gear consequently.

Explains the the basis of evaluation criteria for the test results and characteristics of test platform of 20 000 t Heavy Haul Train test.

Based on the availab le data,a system atic analysis has been m ade of the rare and endangered p lant spec ies in the JinfoMountain Nature Reserve and a tentative system of seven quantitative assessing indexes,inc lud ing deposit coeffic ient and endangerm ent coeffic ient,has been form ed.