Projection Pursuit method invert a number of evaluating indicator into a one-dimensional projection values by the best projection direction, to avoid anthropogenic interference with the expert scoring factors. Application of projection pursuit method for three models of the submarine launched torpedoes capability to conduct a comprehensive evaluation, the best projection direction of the evaluation indicator is got, and a synthetic comprehensive evaluation order of the models is obtained. These supply scientific budget for the operational use , improvements and development of torpedoes.

Aiming at the security problem of railway transport caused by loading position of large equipment, a security alarm system for railway transport of large equipment is developed based on displacement detection by photoelectric matrix. The technologies of photoelectric measurement, wireless communication and computer control are comprehensively integrated, the wide temperature components, low power circuit and high-capacity batteries are used, a variety of energy saving operation modes and anti-interference technical measures are adopted, systematically optimized and comprehensively analyzed. Tests show that the designed system has the characteristics of perfect function, low power consumption, strong anti-interference capability and high reliability, which plays important role on security of railway transport and avoids traffic accidents caused by loading position of large freight.

The development of CubeSats and more frequent launch chances of sounding rockets are a total game changer to the space program, and it allows us to build space instruments that are technologically feasible and affordable. Therefore, it gives us a good opportunity to build a small cosmic-ray detector which has capabilities to measure the flux, direction, and even energy of cosmic rays at an altitude above the limitation of balloon experiments, and it may open a new door for building a constellation of detectors to study cosmic-ray physics. Compact Scintillator Array Detector (ComSAD) is a funded sounding rocket mission of Taiwan’s National Space Organization. In this paper, we present the concept, design, and performance of ComSAD which is also suitable for future CubeSat missions.