As technology has advanced, electronic components and systems have become smaller and more powerful. A similar trend holds for space systems, and satellites are no exception. As payloads become smaller, so too can the launch vehicles designed to carry them into orbital trajectories. An energy analysis shows that a rocket system with as low as tens of kg of fuel can be sufficient to deliver a 10...

The sharp increase in the number of new COVID-19 cases late 2021 and early 2022, which occurred even countries with high vaccination levels, has raised question about possibility overcoming pandemic only through vaccination. Averaged daily numbers deaths per capita their ratio were used to find links percentages fully vaccinated people boosters tests case ratio. datasets for European some other...

Quantum computing is believed to be particularly useful for the simulation of chemistry and materials, among various applications. In recent years, there have been significant advancements in development near-term quantum algorithms simulation, including VQE many its variants. However, such useful, they need overcome several critical barriers inability prepare high-quality approximations ground...

Abstract In this paper, an integration of a fuzzy-interval credibility-constrained (FIC) model expressed by fuzzy interval sets (FIS) and nonlinear programming (INP), termed FIC-INP model, was proposed applied to two cases. After formulating the upper lower disinfection booster costs can be obtained for cases under various combinations credibility levels limits. The results indicated that incre...

Numerical 2D simulation and research on internal flow field and external flow field of rocket motor nozzle using FLUENT software. Analyze the flow condition of internal flow field and external flow field, and according to add in the amount of the different gas components, obtain the clear distribution of contour of density flow field, pressure flow field and various material components and so o...