The ability to measure extremely low thrust levels with unusual precision is becoming more critical as attempts are made to characterize the performance of emerging micropropulsion systems. Many new attitude control concepts for nanospacecraft involve the production of thrust below 1 μN. A simple, but uniquely successful thrust stand has been developed and used to measure thrust levels as low a...

To avoid the potential distortion problem in curve and surface design, a set of improved basis functions is introduced to construct interpolatory curves and surfaces passing through given data points. Compared with the basis functions used in Zhang and Ma (2011) [33], the accuracy of the partition of unity of the improved basis functions exceeds the computation limit of the floating-point in co...

Welding machine is a that facilitates human work in joining metals. There are two types usually used by humans, namely carbide welding machines and electric machines. Which both have their respective advantages as metal connector. This article lifted from the problem occurs frame or on table which experiences severe enough bending of top (head support) can damage unknown load (force) received s...