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To satisfy the requirements for passive safety protection during railway vehicle collisions, a front-end energy absorbing structure for a certain railway vehicle was designed with its collision performance evaluated based on integral analysis of the characteristics of a thin-walled metal structure and an aluminium honeycomb structure.
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Both heavy trucks and concrete barriers were modeled using finite element methods (FEM) to simulate dynamic collision performances.
Structural and material optimization schemes are proposed on the basis of conceptual design in this research, and protective devices constructed of sandwich panels prove to have the best anti-collision performance.
The means of improving anti-collision performance can be to increase the strength of the beam section or to exchange the steel material with novel fiber reinforced polymer laminates.
Raising the anti-collision performance of roadside guardrails is a countermeasure to lessen the severity of heading on collisions.
Flight results demonstrate a significant improvement of collision detection performance, mostly due to the change in angular rate estimation accuracy, and confirm data fusion effectiveness for facing EO detection issues.
In conjunction with the aforementioned discussion, it is important to check the collision rate performance of the proposed channel selection mechanism.
The collision probability performance is also demonstrated for different values of initial contention window size, CW min = 16, CW min = 24, and CW min = 32.
Also we examine the effect of receiver collisions to performance measures evaluation developing analytic Markovian models for finite population.
In addition, since nodes in power saving mode wake up simultaneously to send frames after receiving a beacon frame from the AP, the hidden node problem can become worse, resulting in frequent packet collisions and performance degradation.
The results show that the student pilots significantly improved the accuracy of their estimation of time to collision and their performance in selecting the collision avoidance manoeuvers.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com