Results 21 to 30 of about 429,305 (296)

An Experimental Platform for Multi-spacecraft Phase-Array Communications

, 2017
The emergence of small satellites and CubeSats for interplanetary exploration will mean hundreds if not thousands of spacecraft exploring every corner of the solar-system.
Babuscia, Alessandra, Nallapu, Ravi Teja, Ravindran, Aaditya, Thangavelautham, Jekan, Vazco, Jose, Warren, Andrew   +5 more
core   +1 more source

Encrypted malicious traffic detection based on neural network

Dianzi Jishu Yingyong
With the widespread application of encrypted communications, traditional malicious traffic detection methods based on content analysis have gradually become ineffective.
Xia Longfei, Zhang Qihao, Wu Xianyun, Zhu Xuetian, Gu Xin, Tian Min   +5 more
doaj   +1 more source

A Study on Fuel Estimation Algorithms for a Geostationary Communication & Broadcasting Satellite [PDF]

Journal of Astronomy and Space Sciences, 2000
It has been developed to calculate fuel budget for a geostationary communication and broadcasting satellite. It is quite essential that the pre-launch fuel budget estimation must account for the deterministic transfer and drift orbit maneuver ...
Jong Won Eun
doaj  

Wideband Cooperative Localization Through Generalized Cross-Correlation

IEEE Access
This work proposes a novel algorithm for robust cooperative localization using wideband time difference of arrival (TDoA) measurements and information coupling between nodes.
Andreas Fuchs, Lukas Wielandner, Klaus Witrisal   +2 more
doaj   +1 more source

Analysis of Raindrop Shapes and Scattering Calculations: The Outer Rain Bands of Tropical Depression Nate

Atmosphere, 2020
Tropical storm Nate, which was a powerful hurricane prior to landfall along the US Gulf coast, traversed north and weakened considerably to a tropical depression as it moved near an instrumented site in Hunstville, AL.
Merhala Thurai, Sophie Steger, Franz Teschl, Michael Schönhuber   +3 more
doaj   +1 more source

Satellite-to-ground quantum communication using a 50-kg-class micro-satellite

, 2017
Recent rapid growth in the number of satellite-constellation programs for remote sensing and communications, thanks to the availability of small-size and low-cost satellites, provides impetus for high capacity laser communication (lasercom) in space ...
Carrasco-Casado, Alberto, Fujiwara, Mikio, Kitamura, Mitsuo, Sasaki, Masahide, Takenaka, Hideki, Toyoshima, Morio   +5 more
core   +1 more source

RTUAV-YOLO: A Family of Efficient and Lightweight Models for Real-Time Object Detection in UAV Aerial Imagery

Sensors
Real-time object detection in Unmanned Aerial Vehicle (UAV) imagery is critical yet challenging, requiring high accuracy amidst complex scenes with multi-scale and small objects, under stringent onboard computational constraints.
Ruizhi Zhang, Jinghua Hou, Le Li, Ke Zhang, Li Zhao, Shuo Gao   +5 more
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Pedestrian Dead Reckoning Based on Motion Mode Recognition Using a Smartphone

Sensors, 2018
This paper presents a pedestrian dead reckoning (PDR) approach based on motion mode recognition using a smartphone. The motion mode consists of pedestrian movement state and phone pose.
Boyuan Wang, Xuelin Liu, Baoguo Yu, Ruicai Jia, Xingli Gan   +4 more
doaj   +1 more source