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Xiangxu Lei, Shengfu Xia, Hongkang Liu, Xiaozhen Wang, Zhenwei Li, Baomin Han, Jizhang Sang, You Zhao and Hao Luo
The Changchun Observatory of the National Astronomical Observatories, Chinese Academy of Sciences, and the Shanghai Astronomical Observatory are used to generate very short arc (VSA) angle observations of objects in low Earth orbit (LEO) and geostationar...
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Nattawut Phetmak and Jittat Fakcharoenphol
We consider a problem in computational origami. Given a piece of paper as a convex polygon P and a point f located within, we fold every point on a boundary of P to f and compute a region that is safe from folding, i.e., the region with no creases. This ...
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Anastasiia Zharkova
Pág. 24 - 28
A finite dynamic system of graph orientations is considered. The states of such a system are all possible orientations of a given graph, and the evolutionary function of the system transforms digraphs by reorientation of all arcs entering the sinks. Bran...
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Jordi-Roger Riba
Due to the increase in electrical power demand, future more electric and all-electric aircraft designs will operate at higher voltage levels compared to current aircraft. Due to higher voltage levels and reduced operating pressure, insulation systems wil...
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Daniela Ambrosino, Carmine Cerrone and Anna Sciomachen
This paper presents a new heuristic algorithm tailored to solve large instances of an NP-hard variant of the shortest path problem, denoted the cost-balanced path problem, recently proposed in the literature. The problem consists in finding the origin?de...
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Federico Mosquera, Pieter Smet and Greet Vanden Berghe
A direct way of reducing the number of cars on the road is to dissuade individuals from exclusively using their car and instead integrate public transport into their daily routine. Planning multi-modal journeys is a complex task for which individuals oft...
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Zhigang Zeng, Xuebo Yin, Xiaoyuan Wang, Yu Yan and Xueying Zhang
Gold and other metals (Cu, Zn, Ag, etc.) are enriched in vent fluids, approximately 3?5 orders of magnitude higher than those in seawater, and this leads to the formation of sulfide enrichment in Cu, Zn, Au, and Ag deposited on the mid-ocean ridge and is...
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Hye In Kim, Tae-Seong Roh, Hwanil Huh and Hyoung Jin Lee
With the growth of the satellite industry, the demand for a propulsion system for small launch vehicles and spacecraft has increased. Small liquid rocket engines may require Ultra-Low specific speed centrifugal pumps due to the low required thrust and vo...
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Bogdan Armaselu
An important topic in the field of geometric optimization is finding the largest rectangle separating two different points sets, which has significant applications in circuit design and data science. We consider some extensions of the maximum bichromatic...
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Jian Huang, Xiangxu Lei, Guangyu Zhao, Lei Liu, Zhenwei Li, Hao Luo and Jizhang Sang
For Geosynchronous Earth Orbit (GEO) objects, space-based optical surveillance has advantages over regional ground surveillance in terms of both the timeliness and space coverage. However, space-based optical surveillance may only collect sparse and shor...
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