Results 1 to 10 of about 672,495 (309)

Weapon performance drives weapon evolution

open access: yesProceedings of the Royal Society B: Biological Sciences, 2021
Many sexually selected traits function as weapons, and these weapons can be incredibly diverse. However, the factors underlying weapon diversity among species remain poorly understood, and a fundamental hypothesis to explain this diversity remains untested. Although weapons can serve multiple functions, an undeniably important function is their role in
Zachary Emberts   +2 more
openaire   +5 more sources

Research on Tangential Velocity Solution and Accuracy Analysis of Radar Target [PDF]

open access: yesMATEC Web of Conferences, 2023
In this paper, a calculation method for the tangential velocity solution of radar target based on linear vector method is proposed. It makes full use of the advantage of high precision radial velocity measurement of radar, and realizes the accurate ...
Yin Qi   +3 more
doaj   +1 more source

Exploration and Reform of Helicopter Power Supply System Curriculum Based on Chinese OBE Teaching Mode [PDF]

open access: yesSHS Web of Conferences, 2023
The OBE concept is result oriented education, focusing on whether students have obtained phased research results and enhancing their sense of learning acquisition. Once proposed, it has been deeply recognized by engineering researchers and widely studied.
Fu Yabin, Wang Ling, Li Yiwen
doaj   +1 more source

An Intelligent Classification Approach via Multiple Classifier Fusion and Its Application to the Fault Diagnosis

open access: yesIEEE Access, 2023
The performance of classifiers plays a crucial role in identifying fault categories under mechanical fault diagnosis task. This paper presents a new intelligent classification approach via NA-MEMD and multiple classifier fusion for fault diagnosis, which
Lin Li   +4 more
doaj   +1 more source

BMP9 maintains the phenotype of HTR-8/Svneo trophoblast cells by activating the SDF1/CXCR4 pathway

open access: yesBMC Molecular and Cell Biology, 2023
Background Bone morphogenetic protein 9 (BMP9) has been shown to regulate processes such as angiogenesis, endothelial dysfunction, and tumorigenesis. However, the role of BMP9 in preeclampsia (PE) is unclear.
Xue Yang   +6 more
doaj   +1 more source

Study on the Jamming-Position Maneuver Algorithm of Off-Board Active Electronic Countermeasure Unmanned Surface Vehicles

open access: yesIEEE Access, 2021
The existing off-board active decoys face such common technical problems as short action time, limited jamming power, and difficult control over deployment situation and effective directive jamming beam direction. For this reason, this paper introduces a
Yasong Luo   +3 more
doaj   +1 more source

Collision and obstacle avoidance for agents based on velocity programming in unknown environments under kinematical constraints

open access: yesIET Control Theory & Applications, 2023
This paper conducts research on obstacle and collision avoidance under kinematical constraints in unknown environments, while communication and simultaneous localization and mapping (SLAM) are unavailable to agents. Then a strategy based on mixed‐integer
Zhigang Xiong   +4 more
doaj   +1 more source

An Adaptive and Bounded Controller for Formation Control of Multi-Agent Systems with Communication Break

open access: yesApplied Sciences, 2022
Aiming at maneuvering, input saturation, and communication interference in the controller design for formation control multi-agent systems, a novel nonlinear bounded controller is proposed.
Zhigang Xiong   +3 more
doaj   +1 more source

IFormerFusion: Cross-Domain Frequency Information Learning for Infrared and Visible Image Fusion Based on the Inception Transformer

open access: yesRemote Sensing, 2023
The current deep learning-based image fusion methods can not sufficiently learn the features of images in a wide frequency range. Therefore, we proposed IFormerFusion, which is based on the Inception Transformer and cross-domain frequency fusion.
Zhang Xiong   +3 more
doaj   +1 more source

Remaining Useful Life Interval Prediction for Complex System Based on BiGRU Optimized by Log-Norm

open access: yesIEEE Access, 2022
The task of remaining useful life (RUL) uncertainty management is the major challenge in solving the failure of the complex mechanical system. Primary research methods use statistical models or stochastic processes to fit the distribution of historical ...
Xiaojia Yan, Weige Liang, Dongxue Xu
doaj   +1 more source

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