Results 31 to 40 of about 7,038 (175)

Preliminary Research on the Effectiveness of Gestalt Perceptual Principles in SAR Images

Leida xuebao
Synthetic Aperture Radar (SAR) images are an important data source in microwave vision research; however, computer vision cannot interpret these images effectively based on optical perceptual principles.
Ruixi YOU, Yutong QIAN, Feng XU
doaj   +1 more source

Tunable Multiband Microwave Photonic Filters

Photonics, 2017
The increasing demand for multifunctional devices, the use of cognitive wireless technology to solve the frequency resource shortage problem, as well as the capabilities and operational flexibility necessary to meet ever-changing environment result in an
Mable P. Fok, Jia Ge
doaj   +1 more source

Physically Explainable Intelligent Perception and Application of SAR Target Characteristics Based on Time-frequency Analysis

Leida xuebao
The current state of intelligent target recognition approaches for Synthetic Aperture Radar (SAR) continues to experience challenges owing to their limited robustness, generalizability, and interpretability.
Zhongling HUANG, Chong WU, Xiwen YAO, Lipeng WANG, Junwei HAN   +4 more
doaj   +1 more source

Research Advances on the Rotational Doppler Effect of Vortex Electromagnetic Waves

Leida xuebao, 2021
Traditional radars can detect moving targets using the Doppler effect. However, traditional radars have shadow areas in detecting the angular motion of the rotating targets.
Zhongyi GUO, Yanzhe WANG, Yunlai WANG, Kai GUO   +3 more
doaj   +1 more source

Should we think about green or white analytical chemistry? Case study: Accelerated sample preparation using an ultrasonic bath for the simultaneous determination of Mn and Fe in beef

Heliyon, 2023
Green Analytical Chemistry (GAC) metrics include a variety of criteria, such as the regent amounts and toxicity, energy consumption, generated waste, among others. The analytical greenness metric (AGREE) and its variant for sample preparation (AGREEprep)
Javier Silva, Valery Bühl, Fiorella Iaquinta, Mariela Pistón   +3 more
doaj   +1 more source

A Survey on Robot Semantic Navigation Systems for Indoor Environments

Applied Sciences, 2023
Robot autonomous navigation has become a vital area in the industrial development of minimizing labor-intensive tasks. Most of the recently developed robot navigation systems are based on perceiving geometrical features of the environment, utilizing ...
Raghad Alqobali, Maha Alshmrani, Reem Alnasser, Asrar Rashidi, Tareq Alhmiedat, Osama Moh’d Alia   +5 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Edge detection by spiral phase contrast imaging at terahertz frequencies

Electronics Letters, 2021
This paper proposes the spiral phase contrast (SPC) imaging at terahertz (THz) frequencies to achieve the target edge detection. The THz SPC imaging is built based on a classical 4f imaging system, and a spiral phase plate is placed in the Fourier plane ...
Hui Liu, Shiyou Wu, Meng Zhao, Shen Zheng, Chao Li, Guangyou Fang   +5 more
doaj   +1 more source

Unsupervised domain adaptation for Global Precipitation Measurement satellite constellation using Cycle Generative Adversarial Nets

Environmental Data Science, 2022
Artificial intelligence has provided many breakthroughs in the field of computer vision. The fully convolutional networks U-Net in particular have provided very promising results in the problem of retrieving rain rates from space-borne observations, a ...
Vibolroth Sambath, Nicolas Viltard, Laurent Barthès, Audrey Martini, Cécile Mallet   +4 more
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source