Results 21 to 30 of about 31,731,292 (314)
Impact of Weak Localization in the Time Domain [PDF]
Physical Review Letters, 2004 We find a renormalized "time-dependent diffusion coefficient", D(t), for pulsed excitation of a nominally diffusive sample by solving the Bethe-Salpeter equation with recurrent scattering. We observe a crossover in dynamics in the transformation from a quasi-1D to a slab geometry implemented by varying the ratio of the radius, R, of the cylindrical ...
Cheung, Sai Kit +4 more
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Aerospace, 2022 The problem of three-dimensional impact time control guidance considering field-of-view constraints and time-varying velocity is investigated in this study.
Shuai Ma +3 more
semanticscholar +1 more source
Journal of Public Health in Africa, 2023 Background: The COVID-19 pandemic has seriously impacted access to healthcare facilities across the world, but there is little evidence of how the pandemic influences the use of essential healthcare in the world. Objective: This study aimed to evaluate
Jamal Tikouk +2 more
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Role of offset during drop-on-drop impact dynamics on a superhydrophobic substrate
Results in Surfaces and Interfaces, 2023 Droplet impacting on another deposited droplet (drop-on-drop) is present in various applications. However, the actual impact configuration deviates from completely aligned case.
Ankush Kumar Jaiswal, Sameer Khandekar
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Impact Time Control Cooperative Guidance Law Design Based on Modified Proportional Navigation
Aerospace, 2021 The paper proposes a two-dimensional impact time control cooperative guidance law under constant velocity and a three-dimensional impact time control cooperative guidance law under time-varying velocity, which can both improve the penetration ability and
Jiang Zhanyuan +3 more
semanticscholar +1 more source
Time discretization of vibro‐impact [PDF]
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2001 Summary: We consider vibro-impact problems, i.e. mechanical systems with a finite number of degrees of freedom submitted to perfect unilateral constraints. The dynamics is basically described by a second-order measure differential inclusion for the unknown position completed with a constitutive impact law.
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Field-of-View Constrained Impact Time Control Guidance via Time-Varying Sliding Mode Control
Aerospace, 2021 The problem of impact time control guidance with field-of-view constraint is addressed based on time-varying sliding mode control. The kinematic conditions that satisfy the impact time control with field-of-view constraint are defined, and then a novel ...
Shuai Ma, Xugang Wang, Zhongyuan Wang
semanticscholar +1 more source
International Journal of Aerospace Engineering, 2021 Impact time control guidance (ITCG) is an important approach to achieve saturation attack on targets. With the increasing complexity of warfare requirements for missiles, an ITCG with field-of-view (FOV) constrained for antiship missiles is proposed ...
Shuangxi Liu +4 more
semanticscholar +1 more source
Impact of Screen Time on Sleep Quality
Indian Journal of Psychiatric Nursing, 2021 Background: Technology that years ago we could only dream of or read in science fiction novels, which we then actually created with much hope in their power of connecting people, has become a tool of gratification.
Renju Sussan Baby +6 more
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Distributed Guidance for Multi-wave Arrivals of Multiple Missiles
Guidance, Navigation and ControlCoordinating multiple missiles to arrive in structured waves, where missiles within each wave arrive simultaneously and successive waves are separated by specified time intervals, offers substantial operational advantages but remains challenging under ...
Jialing Zhou, Kexin Liu, Jinhu Lü
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