Airborne ultra-low profile ultra-wideband omnidirectional antenna based on tightly coupled arrays
December 2024
Against the backdrop of electromagnetic space integration, the radio system of equipment platforms, such as next-generation aircraft, must possess multifunctional integration and electromagnetic stealth...
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Numerical design of an efficient Ho3+-doped InF3 fiber laser at ∼3.2 μm
September 2024
In this work, we theoretically unlock the potential of Ho3+-doped InF3 fiber for efficient ∼3.2 μm laser generation (from the 5F4,5S2→5F5 transition), by employing a novel dual-wavelength pumping scheme...
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Effective approach for conformal subarray design based on maximum entropy of planar mappings
September 2024
In this paper, an effective algorithm for optimizing the subarray of conformal arrays is proposed. The method first divides the conformal array into several first-level subarrays. It uses the X algorithm...
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An approach to estimate tree height using PolInSAR data constructed by the Sentinel-1 dual-pol SAR data and RVoG model
September 2024
We estimate tree heights using polarimetric interferometric synthetic aperture radar (PolInSAR) data constructed by the dual-polarization (dual-pol) SAR data and random volume over the ground (RVoG)...
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Global-local combined features to detect pain intensity from facial expression images with attention mechanism
September 2024
The estimation of pain intensity is critical for medical diagnosis and treatment of patients. With the development of image monitoring technology and artificial intelligence, automatic pain assessment...
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Source localization based on field signatures: Laboratory ultrasonic validation
September 2024
Location awareness in wireless networks is essential for emergency services, navigation, gaming and many other applications. This article presents a method for source localization based on measuring...
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Sparse antenna array design methodologies: A review
September 2024
Designing a sparse array with reduced transmit/receive modules (TRMs) is vital for some applications where the antenna system's size, weight, allowed operating space, and cost are limited. Sparse arrays...
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De-biased knowledge distillation framework based on knowledge infusion and label de-biasing techniques
September 2024
Knowledge distillation, as a pivotal technique in the field of model compression, has been widely applied across various domains. However, the problem of student model performance being limited due...
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A 27 GHz, simple 2-bit 1×8 phased array
September 2024
This study demonstrates a simple 2-bit phased array operating at 27 GHz that supports one-dimensional beam scanning with left-handed circular polarization (LHCP). The antenna is constructed using a...
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Electromagnetic scattering and imaging simulation of extremely large-scale sea-ship scene based on GPU parallel technology
June 2024
Aiming to solve the bottleneck problem of electromagnetic scattering simulation in the scenes of extremely large-scale seas and ships, a high-frequency method by using graphics processing unit (GPU)...
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Enhancing personalized exercise recommendation with student and exercise portraits
June 2024
The exercise recommendation system is emerging as a promising application in online learning scenarios, providing personalized recommendations to assist students with explicit learning directions. Existing...
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Data augmentation method for insulators based on Cycle GAN
June 2024
Data augmentation is an important task of using existing data to expand data sets. Using generative countermeasure network technology to realize data augmentation has the advantages of high-quality...
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Miniaturized power detection module operating in millimeter wave band
June 2024
The miniaturized broadband detection module can be embedded into the microwave application system such as the front end of the transmitter to detect the power or other parameters in real time. It is...
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CNN-LSTM based incremental attention mechanism enabled phase-space reconstruction for chaotic time series prediction
June 2024
To improve the prediction accuracy of chaotic time series and reconstruct a more reasonable phase space structure of the prediction network, we propose a convolutional neural network (CNN)-long short-term...
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Machine learning algorithm partially reconfigured on FPGA for an image edge detection system
June 2024
Unmanned aerial vehicles (UAVs) have been widely used in military, medical, wireless communications, aerial surveillance, etc. One key topic involving UAVs is pose estimation in autonomous navigation....
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Efficient ECG classification based on Chi-square distance for arrhythmia detection
June 2024
This study introduces a new classifier tailored to address the limitations inherent in conventional classifiers such as K-nearest neighbor (KNN), random forest (RF), decision tree (DT), and support...
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Low profile cavity-embedded ultra-wideband UHF array antenna with end-fire beams
June 2024
A low profile, vertically polarized, ultra-wideband array antenna with end-fire beams operating in an ultra-high frequency (UHF) band is developed in this paper. The array antenna consists of 1×16 log-periodic...
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Evaluation of a software positioning tool to support SMEs in adoption of big data analytics
March 2024
Big data analytics has been widely adopted by large companies to achieve measurable benefits including increased profitability, customer demand forecasting, cheaper development of products, and improved...
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Big data challenge for monitoring quality in higher education institutions using business intelligence dashboards
March 2024
As big data becomes an apparent challenge to handle when building a business intelligence (BI) system, there is a motivation to handle this challenging issue in higher education institutions (HEIs)....
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Iterative physical optics method based on efficient occlusion judgment with bounding volume hierarchy technology
March 2024
This paper builds a binary tree for the target based on the bounding volume hierarchy technology, thereby achieving strict acceleration of the shadow judgment process and reducing the computational...
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Benchmarking YOLOv5 models for improved human detection in search and rescue missions
March 2024
Drone or unmanned aerial vehicle (UAV) technology has undergone significant changes. The technology allows UAV to carry out a wide range of tasks with an increasing level of sophistication, since drones...
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