|
|
|
|
|
Peng Zhao, Zhensen Wu, Yushi Zhang, Jinpeng Zhang, Xinyu Xu and Jiaji Wu
The Doppler spectra of sea echoes, which contain abundant information on floating scatterers, are important for exploring the characteristics of sea clutter. Using sea clutter data at low grazing angles observed by a coherent ultra-high frequency (UHF) r...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yi-Xuan Huang and Kung-Ming Chung
This study determines the mean and fluctuating pressures for flow through a rectangular shallow cavity (ratio between the length and the depth = 2.43, 4.43, and 6.14; ratio between the length and the width = 0.5, 1.0, and 2.0) at a Mach number of 0.64 in...
ver más
|
|
|
|
|
|
|
|
|
|
|
Euiho Shin, Young-seek Chung, Seonkyo Kim, Cheolsun Park and Jungsuek Oh
This study proposes broadband direction (DOA) estimation through discrete Fourier transform (DFT) extrapolation. We used DFT extrapolation in the lower band and extended the sampled data to reduce the beam width in the spectral domain and improved the ac...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yonggang Ji, Xu Liang, Weifeng Sun, Weimin Huang, Yiming Wang, Xinling Wang and Zhihao Li
A bistatic high-frequency surface wave radar (HFSWR) with both receiving and transmitting stations placed on different ships (platforms) is a new radar system and referred to as shipborne bistatic HFSWR. In this paper, a first-order ocean surface cross s...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hongyun Zhang, Jin Liu and Jie Liu
The geometric features of ground objects can reflect the shape, contour, length, width, and pixel distribution of ground objects and have important applications in the process of object detection and recognition. However, the geometric features of object...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xinguang Wang, Le Wang and Shengmei Zhao
Based on the extended Huygens?Fresnel principle and the power spectrum of anisotropic oceanic turbulence, the analytical expressions of the average intensity and coherence properties of an off-axis hollow Gaussian-Schell model (OAHGSM) vortex beam propag...
ver más
|
|
|
|
|
|
|
|
|
|
|
Haiming Zhang, Aifeng Tao, Junhao Tu, Junwei Su and Shuya Xie
Intensive wave reflection occurs when the wavelengths of the incident waves and bottom undulations are in a 2:1 ratio. Existing studies have included the Bragg resonance phenomenon of waves passing over a continuous undulating bottom parallel to and obli...
ver más
|
|
|
|
|
|
|
|
|
|
|
James Allen, Gregorio Iglesias, Deborah Greaves and Jon Miles
The WaveCat is a moored Wave Energy Converter design which uses wave overtopping discharge into a variable v-shaped hull, to generate electricity through low head turbines. Physical model tests of WaveCat WEC were carried out to determine the device refl...
ver más
|
|
|
|
|
|
|
|
|
|
|
Oleksandr Yudin,Ruslana Ziubina,Serhii Buchyk,Olena Matviichuk-Yudina,Olha Suprun,Viktoriia Ivannikova
Pág. 56 - 64
Methods for verifying and identifying the operator by the features of the formation of biometric features of a speech signal in control systems of unmanned aerial systems are proposed.A method has been developed for the effective width of the spectrum of...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yang Wang, Zhiyuan Gu, Xiangyue Meng, Lei Zhang and Yuegang Fu
Combining the requirements of spectrometers for unmanned aerial vehicle platforms, a miniaturized airborne wide-angle push-broom imaging spectrometer with an Offner configuration is designed. The system comprises an objective lens and an Offner-type spec...
ver más
|
|
|
|
|
|