Results 121 to 130 of about 118,033 (340)

Doppler Frequency Shift Prediction and Acquisition Method for High-Speed Aircraft Relative to Low Orbit Satellites

天地一体化信息网络
The rapid relative displacement between high-speed aircraft and low-Earth orbit (LEO) satellites causes Doppler frequency shifts, affecting signal synchronization, acquisition, and demodulation performance.
LI Yi, ZHOU Kangyan
doaj  

Enhancing Microrobot Swarm Stability and Adaptation by Autonomous Field‐of‐View Planning

Advanced Intelligent Systems, EarlyView.
This work presents an adaptive cross‐field‐of‐view navigation strategy for microrobot swarms in large‐scale workspaces by integrating global path planning via A* and local replanning using optimized informed rapidly‐exploring random tree star . The hybrid approach ensures efficient and robust trajectory execution in dynamic environments, enhancing the ...
Zhaowen Su, Lijun Fang, Hoyeon Kim, U. Kei Cheang   +3 more
wiley   +1 more source

Rotational Doppler Effect of Vector Beams

Photonics
The optical rotational Doppler effect occurs when vortex beams are scattered by rotating objects and demonstrate the Doppler frequency shifts in scattered beams, which are associated with the optical angular momentum of vortex beams and the relative ...
Hehe Li, Dong Xu, Xinzhong Li
doaj   +1 more source

Simplified Doppler Frequency Shift Measurement Enabled by Serrodyne Optical Frequency Translation [PDF]

, 2022
Yang Chen, Taixia Shi
openalex   +1 more source

Skin‐Like Airflow Odometry for Micro Aerial Vehicles Based on Distributed Thermal Anemometers

Advanced Intelligent Systems, EarlyView.
A novel bioinspired skin‐like airflow odometry system for micro aerial vehicles employs distributed thermal anemometers to enable motion estimation in GNSS‐denied environments. Computational fluid dynamics simulation validates sensor deployment feasibility, while a transformer‐enhanced gated recurrent unit network extracts high‐precision airflow ...
Weicheng Di, Shihao Dang, Zheng Gong, Jiahui Zhang, Jinwu Xiang, Yonggang Jiang, Daochun Li, Zhan Tu   +7 more
wiley   +1 more source

Observation of Doppler frequency shift and time of flight of a temporally modulated HF wave propagating through ionosphere [PDF]

, 2022
Takashi Iwamoto, Mao Konishi, Norio Ikeda, Shota Kameoka   +3 more
openalex   +1 more source

Impact of Biomimetic Pinna Shape Variation on Clutter Echoes: A Machine Learning Approach

Advanced Intelligent Systems, EarlyView.
Bats with dynamic ear structures navigate dense, echo‐rich environments, yet the echoes they receive are highly random. This study shows that machine learning can reliably detect structural signatures in these seemingly chaotic biosonar signals. The results open new directions for biologically inspired sensing, where time‐varying receiver shapes ...
Ibrahim Eshera, Sanmeel Lagad, Rolf Müller   +2 more
wiley   +1 more source

Frequency Correction for MIRO Chirp Transformation Spectroscopy Spectrum [PDF]

This software processes the flyby spectra of the Chirp Transform Spectrometer (CTS) of the Microwave Instrument for Rosetta Orbiter (MIRO). The tool corrects the effect of Doppler shift and local-oscillator (LO) frequency shift during the flyby mode of ...
Lee, Seungwon
core   +1 more source

Biocompatibility and healing patterns in experimentally induced canine tibial fractures using Pedicle screw‐Rod external fixation

Animal Models and Experimental Medicine, EarlyView.
This study demonstrates that using a Pedicle screw‐Rod configuration for the external fixation of non‐articular tibial osteotomy aligns well with the principles of biological osteosynthesis, resulting in secondary bone healing characterized by callus formation and neovascularization.
Mohammad Mahdi Gooran, Ramin Mazaheri‐Khameneh, Seyed Mohammad Hashemi‐Asl, Rahim Hobbenaghi   +3 more
wiley   +1 more source

Development of an efficient mice model of cancer‐associated cardiac cachexia

Animal Models and Experimental Medicine, EarlyView.
This work establishes a preclinical framework for targeting ubiquitin pathways to mitigate the morbidity of cancer‐related cardiopathy. Our integrated approach delineates a hierarchical progression from subcellular dysfunction to macroscopic cardiac deterioration. These findings mechanistically link tumor‐induced cachexia to cardiac dysfunction through
Shijie Xiong, Huiting Zheng, Teng Wu, Jing Tan, Tongsheng Huang, Conghui Shen, Yuanjun Ji, Mengying Liu, Junhong Wan, Weibin Cai   +9 more
wiley   +1 more source