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Grigoriev, I. S.; Grigoriev, K. G.

doi:10.1023/a:1024063317807

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…Russell [139] simplified the low-thrust transfer trajectory problem to only a few parameters through the primer vector theory and calculus of variations. Grigoriev et al [140,141] derived the first-order optimal necessity conditions for complex dynamic models and complex interior point constraints. They also introduced the complementary relaxation and rigidity conditions into inequality constraints.…”

Section: Figure 15: Optimal Design Approaches Of Low-thrust Trajectorymentioning

confidence: 99%

Overview of Earth-Moon Transfer Trajectory Modeling and Design

Zhang¹,

Yu²,

Dai³

2023

Computer Modeling in Engineering &Amp; Sciences

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The Moon is the only celestial body that human beings have visited. The design of the Earth-Moon transfer orbits is a critical issue in lunar exploration missions. In the 21st century, new lunar missions including the construction of the lunar space station, the permanent lunar base, and the Earth-Moon transportation network have been proposed, requiring low-cost, expansive launch windows and a fixed arrival epoch for any launch date within the launch window. The low-energy and low-thrust transfers are promising strategies to satisfy the demands. This review provides a detailed landscape of Earth-Moon transfer trajectory design processes, from the traditional patched conic to the state-of-the-art low-energy and low-thrust methods. Essential mechanisms of the various utilized dynamic models and the characteristics of the different design methods are discussed in hopes of helping readers grasp the basic overview of the current Earth-Moon transfer orbit design methods and a deep academic background is unnecessary for the context understanding.

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Section: Figure 15: Optimal Design Approaches Of Low-thrust Trajectorymentioning

confidence: 99%

Overview of Earth-Moon Transfer Trajectory Modeling and Design

Zhang¹,

Yu²,

Dai³

2023

Computer Modeling in Engineering &Amp; Sciences

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“…These are different types of five-storeyed block and brick buildings equipped with outdated utilities (water mains, sewage etc.) [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Rational designing of the internal water supply system in reconstructed residential buildings of mass standard series

Orlov

2018

MATEC Web Conf.

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Abstract. The issues of water supply system reconstruction in mass series buildings are reviewed with consideration of water-and resource saving. Principal points for location of plumbing cells in apartments, arrangement of water devices and wastewater receivers, selection of pipelines for reconstructed water line are described. Comparative analysis of design variants of inner water line before and following reconstruction are given. It was found that applying the developed system design approaches the head losses in the inner water supply line will be significantly decreased as well as the water mains length will be decreased with material and installation saving. Based on the data the conclusions on necessity to review standard arrangement solutions of water supply systems in the reconstructed buildings were made. Recommendations on water loss reduction in the system by installation of special water saving fittings on water devices and touchless faucets.

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