Results 1 to 10 of about 384,643 (168)
Guidance law with impact time and impact angle constraints
Chinese Journal of Aeronautics, 2013 AbstractA novel closed-form guidance law with impact time and impact angle constraints is proposed for salvo attack of anti-ship missiles, which employs missile’s normal acceleration (not jerk) as the control command directly. Firstly, the impact time control problem is formulated as tracking the designated time-to-go (the difference between the ...
Youan Zhang
exaly +2 more sources
The Impact of Elevation Angle on MIMO Capacity [PDF]
2006 IEEE International Conference on Communications, 2006 Many channel models for MIMO systems have appeared in the literature. However, with the exception of a few recent results, they are largely focussed on two dimensional (2D) propagation, i.e., propagation in the horizontal plane, and the impact of elevation angle is not considered.
Mansoor Shafi +4 more
openaire +1 more source
Regenerative tourism: the challenge of transformational leadership [PDF]
Journal of Tourism Futures, 2022 Purpose – The aims of this paper are to share how one cohort of tourism practitioners viewed the transformative change needed within the tourism industry and to explore the implications for leadership in the future.
Jenny Cave +14 more
doaj +1 more source
Adaptive Sliding Mode Guidance With Impact Time and Angle Constraints
IEEE Access, 2020 Based on adaptive sliding mode control method, this paper considers the interception problem to deal with both impact time and angle constraints. The stability and convergence characteristic of proposed guidance law are analyzed.
Xiaodong Liu, Guofei Li
doaj +1 more source
Probing Magnetic Pulse Welding of Thin-Walled Tubes
Journal of Manufacturing and Materials Processing, 2020 Magnetic pulse welding is a solid-state joining technology, based on the use of electromagnetic forces to deform and to weld workpieces. Since no external heat sources are used during the magnetic pulse welding process, it offers important advantages for
Koen Faes, Rishabh Shotri, Amitava De
doaj +1 more source
Materials Research Express, 2020 The present study investigated the erosion wear behavior of WC-Ni and WC-Cr _3 C _2 -Ni cermet coatings deposited by high velocity oxy-fuel (HVOF) spray process on the substrate of 1Cr18Ni9Ti stainless steel.
Yirui Chen +4 more
doaj +1 more source
Erosion Behaviour of API X100 Pipeline Steel at Various Impact Angles and Particle Speeds
Metals, 2016 Erosion is the gradual removal of material due to solid particle impingement and results in a failure of pipeline materials. In this study, a series of erosion tests were carried out to investigate the influence of particle speed and impact angle on the ...
Paul C. Okonkwo +3 more
doaj +1 more source
Erosion Behavior of Steel Pipes Carrying of Some Iraqi Crude Oils [PDF]
Engineering and Technology Journal, 2016 This paper deals with erosion that is defined as a process of progressive removal of material from a target surface due to repeated impacts of solid particles for the special case of two phases (liquid and solid). Experimental investigation dependence on
Ali H. Ataiwi +2 more
doaj +1 more source
Advanced top-attack trajectory guidance law with impact angle [PDF]
Journal of Engineering Science and Military Technologies, 2021 tanks armoring, which made old generations of anti-tank missiles areno longer able to counteract modern tanks by hitting armor in the frontor the side sections of the tank.
Abdallah Abu El-Wafa +3 more
doaj +1 more source
Impact-Sliding of Sintered Steel: Effect of Lubrication
Tribology Online, 2013 Sintered steel is used as a material for valve seat insert in automotive engines. During operation, a dynamic contact occurs between the valve and its seat.
Maha Messaadi +2 more
doaj +1 more source