Strict planetary protection practices are implemented during spacecraft assembly to prevent inadvertent transfer of earth microorganisms to other planetary bodies. Therefore, spacecraft are assembled in cleanrooms, which undergo strict cleaning and decontamination procedures to reduce total microbial bioburden. We wanted to evaluate if these practices selectively favor survival and growth of ha...

Abstract. Scene classification based on multi-source remote sensing image is important for interpretation, and has many applications, such as change detection, visual navigation retrieval. Deep learning become a research hotspot in the field of scene classification, dataset an driving force to promote its development. Most datasets are optical images, multimodal relatively rare. Existing that c...

Productivity can be greatly improved by converting the traditional assembly line to a seru system, especially in the business environment with short product life cycles, uncertain product types and fluctuating production volumes. Line-seru conversion includes two decision processes, i.e., seru formation and seru load. For simplicity, however, previous studies focus on the seru formation with a ...

Assembly line balancing is a classic ill-structured problem where total enumeration is infeasible and optimal solutions uncertain for industrial problems. A quantitative approach to classifying problem difficulty and solution quality is therefore important. Two existing measures of difficulty, Order Strength and West Ratio are compared to a new compound expression of difficulty, Project Index. ...

this paper presents a summary of the results from the simulation of a given two-stages production system which uses jit. the system consists of an assembly line with two automated assembly cells and two assembly stock points and one manufacturing cell with three manufacturing stock points for storing reserved parts and one receiving stock. carts with fixed capacity are used for handling the par...

Since the NASA space exploration roadmap has been oriented toward the “back to the Moon” paradigm in 2004, most space agencies (and ESA in particular) consider the Moon as the very likely next destination for human exploration of the solar system (Mars being obviously in line of sight). Planetary exploration endeavors in the solar system rely more and more on robotic tools and platforms, as pre...