Vehicles need to detect threats on the road, anticipate emerging dangerous driving situations and take proactive actions for collision avoidance. Therefore, study methods of target detection recognition are practical value a self-driving system. However, single sensor has its weakness, such as poor weather adaptability with lidar camera. In this article, we propose novel spatial calibration method based multi-sensor systems, approach utilizes rotation translation coordinate The validity...

Sea clutter has a major impact on the detection performance of shipborne high-frequency surface wave radar (HFSWR) system. Due to platform motion HFSWR, Doppler spectrum first-order sea suffers from some broadening so that targets submerged in this can be hardly detected. In letter, an improved oblique projection (IOP) method, combining (OP) algorithm and method suppression domain, is proposed suppress both domain spatial for HFSWR. Compared with OP orthogonal weighting algorithms, IOP shown...

This paper deals with the problem of sea clutter suppression for shipborne high frequency surface wave radar (HFSWR) based on joint domain localized (JDL) adaptive processing algorithm. The performance novel method is compared 2D FFT plus digital beamforming (FFT-DBF) and orthogonal weight in different azimuths. results simulated real data show that provides higher detection than others.

It is difficult to detect the target submerged in spread spectrum of first-order sea clutter caused by platform motion shipborne high frequency surface wave radar (HFSWR). Based on oblique projection operators with steering vector, a technique for detection proposed this paper, which can completely suppress interference coming from known incident direction. The simulation and experimental results demonstrate reliable estimation HFSWR.

For detection of target submerged in the spread Doppler spectrum first‐order sea clutter shipborne high‐frequency surface‐wave radar (HFSWR), there still remains a challenge. In this study, an improved orthogonal weighting (OW) algorithm is proposed for HFSWR to suppress both domain and spatial domain. By combining OW with method suppression domain, performance azimuth estimation thus preserved. Compared two‐dimensional fast Fourier transform plus digital beamforming, new approach verified...

The integration of Artificial Intelligence (AI) in retail has redefined customer experience, offering new opportunities for personalisation, service quality enhancement, and continuous delivery. This study investigates the impact AI on customers’ experience at Giant Hypermarkets Klang Valley, Malaysia, focusing four key areas: quality, hassle-free service, service. Using quantitative methods, data were gathered from 365 respondents to assess influence AI-driven services experience. findings...

Sea clutter has a serious influence on the detection performance of shipborne high-frequency surface wave radar (HFSWR) system, especially when target is submerged in spread Doppler spectrum first-order sea clutter. A prediction cancellation (PC) method based radial basis function neural network (RBFNN) put forward to suppress time domain for HFSWR. Using RBFNN trained by averaged data from range cells surrounding cell interest, PC algorithm implemented interested cell. Compared with...

This paper firstly introduces generation mechanism and motion characteristics of ocean mesoscale eddies. Then a simple cross-sectional model eddy is set up. At last, it makes study on the simulation eddies with Shipboard High Frequency Surface Wave Radar, by using point target synthesis analysing sum echo signals within area affected The article gives sea clutter spectrums in different cases, providing an effective theoretical basis for monitoring under ideal situation. (4 pages)

In order to further investigate HF radar waves echo chaotic characteristics, we study data. The correlation dimension and Kolmogorov entropy are calculated based on the phase space reconstruction theory. calculation of dimension, fuzzy K-means algorithm is used determine scale-free range improve accuracy calculation. value fraction. According formula calculating K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> proposed by Grassberger...