Abstract Spiroid gear is one of the progressive varieties intersecting axis gears. It has a number advantages: increased overlap coefficient, favourable contact conditions. gears are notable for high loading and overloading ability, smooth running less sensitivity to manufacturing assembly errors, reliability durability. The analysis results experiment on research vibration spiroid PS-124 shown...

Abstract To improve the adaptability of polycarboxylic acid water reducer to different machine-made sands, this paper adopts methacrylic and m-aminobenzene sulfonic obtain esterification monomer then conducts free radical polymerization with highly active polyether macromonomer unsaturated silane under action redox initiator system synthesize green adaptable reducer. The test results showed tha...

SUMMARY Multivariate normal or Student importance sampling is a commonly used technique for integration problems in statistical inference. This integration approach is easy to implement, has straightforward error estimates and is eeective in a number of problems. A variety of variance reduction techniques can be considered with importance sampling. Stratiied sampling is one of these and in fact...