Results 41 to 50 of about 11,222 (247)

DBnet: A Lightweight Dual-Backbone Target Detection Model Based on Side-Scan Sonar Images

Journal of Marine Science and Engineering
Due to the large number of parameters and high computational complexity of current target detection models, it is challenging to perform fast and accurate target detection in side-scan sonar images under the existing technical conditions, especially in ...
Quanhong Ma, Shaohua Jin, Gang Bian, Yang Cui, Guoqing Liu   +4 more
doaj   +1 more source

A simple method for retrieving significant wave height from Dopplerized X-band radar [PDF]

Ocean Science, 2017
Retrieving spectral wave parameters such as the peak wave direction and wave period from marine radar backscatter intensity is very well developed.
R. Carrasco, M. Streßer, J. Horstmann
doaj   +1 more source

A Curvelet-Transform-Based Image Fusion Method Incorporating Side-Scan Sonar Image Features

Journal of Marine Science and Engineering, 2023
Current methods of fusing side-scan sonar images fail to tackle the issues of shadow removal, preservation of information from adjacent strip images, and maintenance of image clarity and contrast. To address these deficiencies, a novel curvelet-transform-
Xinyang Zhao, Shaohua Jin, Gang Bian, Yang Cui, Junsen Wang, Bo Zhou   +5 more
doaj   +1 more source

Changes in Ocean Heat, Carbon Content, and Ventilation: A Review of the First Decade of GO-SHIP Global Repeat Hydrography.

Annual Review of Marine Science, 2016
Global ship-based programs, with highly accurate, full water column physical and biogeochemical observations repeated decadally since the 1970s, provide a crucial resource for documenting ocean change.
L. D. Talley, R. Feely, B. M. Sloyan, R. Wanninkhof, M. O. Baringer, J. Bullister, C. Carlson, S. Doney, R. Fine, E. Firing, N. Gruber, D. A. Hansell, M. Ishii, G. C. Johnson, K. Katsumata, R. Key, M. Kramp, C. Langdon, A. Macdonald, J. Mathis, E. McDonagh, S. Mecking, F. Millero, C. Mordy, T. Nakano, C. Sabine, W. M. Smethie, J. Swift, T. Tanhua, A. Thurnherr, M. J. Warner, J.-Z. Zhang   +31 more
semanticscholar   +1 more source

The Hidden Harvest: Harnessing Colorado's Geodiversity and Environmental Heterogeneity for Sustainable Agritourism

Sustainable Development, EarlyView.
ABSTRACT Colorado's geologic, pedologic, topographic, hydrological, and climatic contrasts create strong but under‐synthesized opportunities for sustainable agritourism. This review investigates how geodiversity, and the broader environmental heterogeneity within which it operates, can be used to diversify farm income, strengthen place‐based visitor ...
Bonface O. Manono
wiley   +1 more source

A Method for Full-Depth Sound Speed Profile Reconstruction Based on Average Sound Speed Extrapolation

Journal of Marine Science and Engineering
The speed of sound in seawater plays a crucial role in determining the accuracy of multibeam bathymetric measurements. In deep-sea multibeam measurements, the challenge of inadequate longitudinal coverage of sound speed profiles arises from variations in
Wei Zhang, Shaohua Jin, Gang Bian, Chengyang Peng, Haixing Xia   +4 more
doaj   +1 more source

Holocene hydrography evolution in the Alboran Sea: a multi-record and multi-proxy comparison

Climate of the Past, 2019
. A new high-resolution deglacial and Holocene sea surface temperature (SST) reconstruction is presented for the Alboran Sea (western Mediterranean), based on Mg∕Ca ratios measured in the planktonic foraminifera Globigerina bulloides.
A. Català, I. Cacho, J. Frigola, L. Pena, F. Lirer   +4 more
semanticscholar   +1 more source

Trace Element Contamination in Top Predatory Elasmobranchs From the Southern Black Sea: Implications for Ecosystem Health and Risk Assessment

Environmental Toxicology, EarlyView.
ABSTRACT Environmental pollution resulting from the rapid increase in human population, urbanization, intensive use of chemicals in agriculture, and industrial development has reached a level that threatens natural life today. Trace elements are one of the most important factors causing significant levels of pollution in the environment and are added ...
Levent Bat, Süleyman Özdemir, Zekiye Birinci Özdemir, Ayşah Öztekin   +3 more
wiley   +1 more source

Fishing Activity Affected Odontocete Cetacean Distribution in a Marine Protected Area in the East China Sea

Integrative Zoology, EarlyView.
Spatiotemporal distribution of odontocete cetaceans within China's Jiushan Archipelago National Nature Reserve was investigated. Fishing vessels significantly reduced both cetacean acoustic detections and feeding activity, whereas gillnets selectively suppressed cetacean feeding behavior without affecting overall cetacean detection rates.
Yifan Liu, Zitong Zhou, Peng Ding, Yu Pan, Zhi Yang, Haochi Wang, Fangqiao Wang, Tianshi Wei, Pengxiang Duan, Tomonari Akamatsu, Zhitao Wang   +10 more
wiley   +1 more source

Hydrography of the Nile [PDF]

The Geographical Journal, 1905
n ...
W., A. S., Garstin, William
openaire   +1 more source