Results 61 to 70 of about 1,467,178 (193)

Target identification using bistatic high‐resolution range profiles

IET Radar, Sonar & Navigation, 2017
A novel target identification scheme that utilises high‐resolution range profiles (HRRPs), which are obtained using bistatic (BS) radar (BS‐HRRPs) and four‐dimensional (4D) parameter sets (PSs), is described. These PSs uniquely determine the BS‐HRRPs. In the proposed scheme, a new feature to cope with the scale variances of the BS‐HRRPs is devised by ...
Seung, Jae-Lee, Jeong, Seong-Jae, Yang, Eunjung, Kim, Kyung-Tae   +3 more
openaire   +2 more sources

High Accuracy Profile Measurement With a New Virtual Multi-Probe Scanning System

IEEE Access, 2020
We present a novel virtual multi-probe scanning system and a new error separation method for the exact optical profile reconstruction. The system realized the multi-probe function by a single probe that fixed on a flexible hinge stage. The flexible hinge
Ning Chai, Ziqiang Yin, Jianhua Yao
doaj   +1 more source

Group-Fusion One-Dimensional Convolutional Neural Network for Ballistic Target High-Resolution Range Profile Recognition with Layer-Wise Auxiliary Classifiers

International Journal of Computational Intelligence Systems, 2023
Ballistic missile defense systems require accurate target recognition technology. Effective feature extraction is crucial for this purpose. The deep convolutional neural network (CNN) has proven to be an effective method for recognizing high-resolution ...
Qian Xiang, Xiaodan Wang, Jie Lai, Yafei Song, Rui Li, Lei Lei   +5 more
doaj   +1 more source

An attractor for the dynamical state of the intracluster medium

, 2012
Galaxy clusters provide us with important information about the cosmology of our universe. Observations of the X-ray radiation or of the SZ effect allow us to measure the density and temperature of the hot intergalactic medium between the galaxies in a ...
Barber, Binney, Buote, Cavaliere, Frederiksen, Hansen, Hansen, Host, Host, Kennicutt, Kneib, Li, Lynden-Bell, Sparre, Vikhlinin, Vikhlinin, ZuHone   +16 more
core   +1 more source

Few-shot Radar High-resolution Range Profile: Target Recognition with Simulated Data Assistance

Leida xuebao
Research on target recognition using radar High-Resolution Range Profiles (HRRPs) is extensive and diverse in methodology. In particular, the application and development of deep learning to radar HRRP target recognition have enabled efficient, precise ...
Jian CHEN, Gang YU, Lan DU, Wenqiang DONG, Yuchen GUO   +4 more
doaj   +1 more source

The rationale and suggested approaches for research geosynchronous satellite measurements for severe storm and mesoscale investigations [PDF]

The measurements from current and planned geosynchronous satellites provide quantitative estimates of temperature and moisture profiles, surface temperature, wind, cloud properties, and precipitation.
Adler, R. F., Chesters, D., Shenk, W. E., Susskind, J., Uccellini, L.   +4 more
core   +1 more source

NIHAO IV: Core creation and destruction in dark matter density profiles across cosmic time

, 2019
We use the NIHAO simulations to investigate the effects of baryonic physics on the time evolution of Dark Matter central density profiles. The sample is made of $\approx 70$ independent high resolution hydrodynamical simulations of galaxy formation and ...
Brook, Chris, Buck, Tobias, Di Cintio, Arianna, Dutton, Aaron A., Gutcke, Thales A., Kang, Xi, Keller, Ben W., Macciò, Andrea V., Penzo, Camilla, Stinson, Greg S., Tollet, Edouard, Wadsley, James, Wang, Liang   +12 more
core   +3 more sources

High-Sensitivity 86GHz (3.5mm) VLBI Observations of M87: Deep Imaging of the Jet Base at a 10 Schwarzschild-Radius Resolution [PDF]

, 2015
We report on results from new high-sensitivity, high-resolution 86GHz (3.5 millimeter) observations of the jet base in the nearby radio galaxy M87, obtained by the Very Long Baseline Array in conjunction with the Green Bank Telescope. The resulting image
Akiyama, Kazunori, Doi, Akihiro, Giovannini, Gabriele, Giroletti, Marcello, Hada, Kazuhiro, Hagiwara, Yoshiaki, Honma, Mareki, Kino, Motoki, Lico, Rocco, Nagai, Hiroshi, Orienti, Monica, Tazaki, Fumie   +11 more
core   +2 more sources

Limited Sample Radar HRRP Recognition Using FWA-GAN

Remote Sensing
In radar High-Resolution Range Profile (HRRP) target recognition, the targets of interest are always non-cooperative, posing a significant challenge in acquiring sufficient samples.
Yiheng Song, Liang Zhang, Yanhua Wang
doaj   +1 more source

HST Observations of Chromospheres in Metal Deficient Field Giants

, 2007
HST high resolution spectra of metal-deficient field giants more than double the stars in previous studies, span about 3 magnitudes on the red giant branch, and sample an abundance range [Fe/H]= -1 to -3.
A. K. Dupree, Barnes T. G., Bates B., Cousins A. W. J., Gondoin P., Graeme H. Smith, Gratton R. G., Johnson H. L., Kemp S. N., Kurucz R. L., Lyons M. A., Mallia E. A., Murray C. A., Pizzolato N., Rutten R. G. M., Sanders W. L., Schrijver C. J., Seaton M. J., Strassmeier K. G., Timothy Q. Li   +19 more
core   +1 more source