Results 31 to 40 of about 189,054 (358)

Research on an Adaptive Coupling Technique for Spatially Scattered Light

Sensors
Focusing on the problems of difficult alignment and low efficiency when coupling the spatially scattered light from 532 nm underwater LiDAR to a single-mode fiber, this paper presents an analysis and simulation of the coupling principle of spatially ...
Xin Liu, Shiyang Shen, Lei Zhu, Lisong Deng, Xiangyu Wang, Mingfeng He, Fei Xiao   +6 more
doaj   +1 more source

Transmit and Receive Array Structure Design of Two-Dimensional hybrid Phased-MIMO Radar based on Nested Array

MATEC Web of Conferences, 2018
In order to reduce the loss of Degree of Freedom (DOF) brought by the transmit subarray splitting of two-dimensional hybrid phased-MIMO radar, this paper presents a design method of transmitting and receiving array based on nested array structure ...
Cheng Tianhao, Wang Buhong, Liu Qiaoge, Tian Jiwei   +3 more
doaj   +1 more source

Climatological characteristics and influencing factors of precipitation from landfalling tropical cyclones in East China

Frontiers in Earth Science
IntroductionThis study investigates the precipitation characteristics of tropical cyclones (TCs) making landfall in East China from 1960 to 2010.MethodsStatistical and factor analysis methodologies were employed, leveraging TC precipitation separation ...
Longbin Ye, Longbin Ye, Jing Zhu, Zhengshuai Wang, Zhizhong Su   +4 more
doaj   +1 more source

Phased electromagnetic acoustic transducer array for Rayleigh wave surface defect detection [PDF]

, 2020
A phased electromagnetic acoustic transducer (EMAT) array system has been developed for detection and characterisation of surface breaking defects. An array of four linear coils which are individually controlled are used to generate a Rayleigh wave.
Dixon, S., Edwards, R. S. (Rachel S.), Greenshields, David, Xiang, L.   +3 more
core   +1 more source

Focusing Modeling of OPFC Linear Array Transducer by Using Distributed Point Source Method

Abstract and Applied Analysis, 2014
The improvement of ultrasonic phased array detection technology is a major concern of engineering community. Orthotropic piezoelectric fiber composite (OPFC) can be constructed to multielement linear array which may be applied conveniently to actuators ...
Ziping Wang, Ying Luo
doaj   +1 more source

Multi-Antenna Phased Array Radar-Guided Search Resource Optimization Algorithm Based on MADDPG [PDF]

Jisuanji gongcheng
An optimization algorithm for multi-antenna phased array radar search parameters based on the Multi-Agent Deep Deterministic Policy Gradient (MADDPG) is proposed to address the problem that search parameters of the traditional single-antenna phased array
WANG Teng, HUANG Junsong, WANG Leting, ZHANG Caikun, LI Xiaoyang
doaj   +1 more source

Digital Predistortion Utilizing Over-the-Air Feedback for Phased Arrays

IEEE Access, 2021
In this paper, an efficient digital predistortion (DPD) architecture utilizing over-the-air (OTA) feedback is presented to linearize phased array transmitters.
Ying Liu, Xiangjie Xia, Qiannan Zhang, Wensheng Pan, Shihai Shao, Youxi Tang   +5 more
doaj   +1 more source

Redundancy Calibration of Phased Array Stations [PDF]

, 2012
Our aim is to assess the benefits and limitations of using the redundant visibility information in regular phased array systems for improving the calibration. Regular arrays offer the possibility to use redundant visibility information to constrain the
Noorishad, Parisa, van Ardenne, Arnold, van der Hulst, Thijs, Wijnholds, Stefan J.   +3 more
core   +3 more sources

Phased burst error-correcting array codes [PDF]

, 1993
Various aspects of single-phased burst-error-correcting array codes are explored. These codes are composed of two-dimensional arrays with row and column parities with a diagonally cyclic readout order; they are capable of correcting a single burst error ...
Goodman, Rodney M., McEliece, Robert J., Sayano, Masahiro   +2 more
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source