Results 21 to 30 of about 8,041 (308)

A Spatial Registration Method for Multi-UAVs Based on a Cooperative Platform in a Geodesic Coordinate Information-Free Environment

Applied Sciences, 2023
The satellite navigation system of Unmanned Aerial Vehicles (UAVs) is susceptible to external interference in a complex environment, resulting in the loss of their own geodetic coordinate information. A spatial registration method for multi-UAVs based on
Qiuyang Dai, Faxing Lu, Junfei Xu
doaj   +1 more source

Equivalent Phase Shift Induced by Longitudinal Temperature Distribution in Pumped DFB Fiber Laser

Photonics
The pump heating effect of DFB fiber laser is normally ignored due to the short length of the laser cavity. However, by fabricating a phase-shifted FBG on high concentration Er-Yb codoped fiber to obtain a 16 mm long DFB fiber laser, the gradient surface
Wen Liu, Hongcan Gu, Su Zhang, Yandong Pang, Gaofei Yao, Hongwei Han, Junbing Huang   +6 more
doaj   +1 more source

Acoustic Scattering Characteristics of Underwater Eight-grid Air-filled Cavity Corner Reflector

水下无人系统学报, 2022
Underwater corner reflectors have a strong acoustic scattering ability and can be used to mark underwater structures and simulate underwater false targets. In accordance with the limitation of the reflection range of a single-grid corner reflector, a new
Zi-chao CHU, Yi LUO, Wu-di WEN
doaj   +1 more source

Fort Mose Weaponry 1

, 2022
An exhibit showcasing weaponry used at Fort Mose, including an 18th-century flintlock pistol replica, musket balls, lead shots, and gunflints, emphasizing the military readiness of the fort.https://stars.library.ucf.edu/staugustine2022/1135/thumbnail ...
Howard, Wendy S
core  

A Novel Anti-DRFM Active Jammer Method for Two-Station Netted Radar Based on Extended Kalman Filtering

International Journal of Antennas and Propagation
Active jammers in the form of digital radio frequency memory (DRFM) could produce false targets with a coherence of range and velocity, making it increasingly efficient in interrupting radar systems based on data correlation analysis.
Yasong Luo, Zhaodong Wu, Chengxu Feng, Shengliang Hu   +3 more
doaj   +1 more source

Experience With Performing Rheocarna Therapy via the Single‐Needle Method for Treatment of Chronic Limb‐Threatening Ischemia

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction This study investigated the safety and efficacy of single‐needle Rheocarna therapy for chronic limb‐threatening ischemia (CLTI) with wounds. Methods Six patients with CLTI involving ulcers unresponsive to revascularization underwent single‐needle Rheocarna treatment.
Yasutaka Yamauchi, Rie Tanaka, Reona Kawahira, Shingo Nabeta, Kouhei Naoi, Kazuhito Kitajima, Akira Wada, Tomonari Takagi, Norihiko Ohura, Akira Miyamoto   +9 more
wiley   +1 more source

Analysis of the Measurability Requirement for Weaponry

, 2011
Now, a great deal of high tech weaponry are equipped for army, to ensure combat effectiveness of equipment in the Entire Life Cycle (ELC) and improve battle effectiveness, the measurability of equipment should be paid more and more attention to.This ...
Wei Jiang
core   +1 more source

A 3D Multipath Planning Method for Guided Vehicles Using Improved A∗ Algorithm Based on Multiple Avoidance Tactics and Terminal Attack Angles

International Journal of Aerospace Engineering
Existing path planning methods have limitations such as random solutions, lack of sharing initial and terminal waypoints, and rare consideration of avoidance between multipaths in 3D. This paper presents a 3D multipath planning method for guided vehicles
Jun Huang, Pengfei Wu, Xiaobao Li, Yue Liu   +3 more
doaj   +1 more source

Dynamic Doppler Characteristics of Maritime Airborne Corner Reflector

Journal of Marine Science and Engineering
The maritime airborne corner reflector (ACR) is a radar reflector that can measure wind speed in an unknown sea area in real time over a long distance. To improve our understanding of how the ACR works, we investigated the Doppler characteristics of the ...
Lingang Wu, Shengliang Hu, Chengxu Feng, Yasong Luo, Zhong Liu, Li Lin   +5 more
doaj   +1 more source

Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?

FEBS Letters, EarlyView.
This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes, Guilherme M. Azevedo, Amanda P. Barcellos, Diana Bahia   +3 more
wiley   +1 more source