Having finished the tests, the weight losses of the specimens were measured, the coefficient of friction values were calculated, optical and SEM investigations were performed and finally the wear behaviour of conventionally used sliding bearing alloys was characterized.
Within eight replicates of the same type of specimens, the average correlation coefficient of array expression signals was very high at 0.96 ± 0.02 which showed an impressive technological reproducibility.
From this theory, relationships between the number of specimens in a group, the coefficient of variation obtained after testing the specimens, the targeted precision index and confidence interval are given.
To determine the coefficient of friction, standard ring compression specimens of outer diameter: inner diameter: height ratio of 6 3 2 (20:10:6.67) were prepared by machining the sintered specimens.
The coefficient of permeability was calculated for each of the test specimens, and the oxygen permeability index (OPI) is given as the negative log of the average coefficients of the specimens.
The intra-specimen coefficient of error values for the measured DNA content of all the examined hippocampal pyramidal layers were below 0.06 (Fig. 1c), indicating acceptable levels of precision [36].
The result showed that the friction coefficients of the treated specimen pairs were remarkably lower than those of untreated ones, and with the increase of normal loads, the coefficient decreased.
The ZrC reinforced specimens showed the lower coefficient of friction and maximum wear resistance.
In addition, the coefficient of variation in the fiber volume fraction distribution is inferred to be ∼ 6%; by comparison, measurements made on relatively large specimens yield a coefficient of variation of ∼ 3%.
"The coefficient is incredibly important.
