Results 31 to 40 of about 186,351 (332)

Dynamic Characteristics of LOX/Kerosene Variable Thrust Liquid Rocket Engine Test System Based on General Modular Simulation Method

open access: yesInternational Journal of Aerospace Engineering, 2022
For the research demand of reusable LOX/kerosene variable thrust liquid rocket engine, a test system with electric displacement pumps is designed and a multidisciplinary modular dynamic simulation method based on AMESim platform is used to analyze the ...
Qingdong Su   +5 more
doaj   +1 more source

Live–virtual–constructive simulation for testing and evaluation of air combat tactics, techniques, and procedures, Part 2: demonstration of the framework [PDF]

open access: yes, 2021
In this paper, the use of the live (L), virtual (V), and constructive (C) simulation framework introduced in Part 1 of this two-part study is demonstrated in the testing and evaluation of air combat tactics, techniques, and procedures (TTP).
Don Harris   +5 more
core   +1 more source

Automatic LPI radar waveform recognition of overlapping signals based on vision language model

open access: yesScientific Reports
Low probability of intercept (LPI) microwave waveforms are commonly utilized in multiple radar systems. Identifying precisely the modulation formats of LPI waveform is of importance in complex electromagnetic environment.
Pengkun Yang   +4 more
doaj   +1 more source

Craniofacial impalement injury: Projectile fragment to the head

open access: yesArchives of Trauma Research, 2018
Circular saws and angle grinders are two of the most dangerous pieces of electrical equipment on a worksite. Besides the danger that any high-powered, sharp piece of equipment possesses, these pieces use circular saw blades that can splinter into ...
Celia Y Quang   +5 more
doaj   +1 more source

MISSILE POSITION ESTIMATION USING UNSCENTED KALMAN FILTER

open access: yesBarekeng, 2022
Missiles are military rocket weapons having an automatic control system to locate its targets or adjust its direction. Indonesia itself, which is a country of archipelago, covers air area of its largest territory, followed by sea area and land area ...
Teguh Herlambang, Subchan Subchan
doaj   +1 more source

An AI‐Enabled All‐In‐One Visual, Proximity, and Tactile Perception Multimodal Sensor

open access: yesAdvanced Robotics Research, EarlyView.
Targeting integrated multimodal perception of robots, an AI‐enabled all‐in‐one multimodal sensor is proposed. This sensor is capable of perceiving three types of modalities, including vision, proximity, and tactility. By toggling an ultraviolet light and adjusting the camera focus, it switches smoothly between multiple perceptual modalities, enabling ...
Menghao Pu   +7 more
wiley   +1 more source

The North Korea–United States Summit and Possibilities for New Security-Oriented Thinking

open access: yesJournal for Peace and Nuclear Disarmament, 2019
In this paper, the first in PSNA Working Paper Series, the author demonstrates that we are now entering an era when nuclear deterrence as a security measure is ineffective, by taking an example of the issue of North Korea’s denuclearization talks. Unlike
Kyoji Yanagisawa
doaj   +1 more source

Visualizing and Quantifying Impact with Mechanochromic Sensing Paints Based on Self‐Assembled Polydiacetylene‐Silk Core‐Shell Vesicles

open access: yesAdvanced Science, EarlyView.
Tracking physical impacts is important in many fields. Self‐assembled microparticles made from polydiacetylene and silk fibroin that change color from blue to red when hit can provide an alternative approach to traditional mechanical transducers, quantitatively visualizing impact with responses ranging from <100 to 770 N.
Marco Lo Presti   +4 more
wiley   +1 more source

Multi-Mode Electric Actuator Dynamic Modelling for Missile Fin Control

open access: yesAerospace, 2017
Linear first/second order fin direct current (DC) actuator model approximations for missile applications are currently limited to angular position and angular velocity state variables.
Bhimashankar Gurav   +3 more
doaj   +1 more source

Numerical modeling of the impact of projectiles on metal structures / Численное моделирование удара снаряда пo mеталлической структуре / Numeričko modelovanje udara projektila o metalne strukture [PDF]

open access: yesVojnotehnički Glasnik, 2018
This paper describes the numerical modeling of impact damage caused by impacts of projectiles on metal structures and the experimental results of impacts of projectiles of different shapes on metal structures.
Dragoljub M. Spasić
doaj   +1 more source

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