Results 1 to 10 of about 2,483,424 (310)

Joint Channel Estimation, Data Decoding, and Group-Sparse Impulsive Noise Estimation for Slowly Time-Varying Single Carrier Underwater Acoustic Communications

IEEE Access
The Gaussian noise assumption is usually made for slowly time-varying underwater acoustic communication (UWAC) systems, which is entirely adequate for most cases.
Minhao Zhang, Jiang Zhu, Yifan Wang, Yanbing Fu, Yan Wei, Xingbin Tu, Fengzhong Qu   +6 more
doaj   +1 more source

Increasing deep-water overflow from the Pacific into the South China Sea revealed by mooring observations

Nature Communications, 2023
Cold and dense water from the North Pacific Ocean that spills through the Luzon Strait, the only deep conduit between the South China Sea (SCS) and the Pacific Ocean, renews deep-water mass, modulates hydrographic and biogeochemical cycles, and drives ...
Chun Zhou, Xin Xiao, Wei Zhao, Jiayan Yang, Xiaodong Huang, Shoude Guan, Zhiwei Zhang, Jiwei Tian   +7 more
doaj   +1 more source

In situ magnetometry study on the origin of anomalously capacity in transition metal sulfides

ChemPhysMater, 2023
Cobalt sulfides are considered as promising candidates for lithium-ion battery (LIB) anode materials with high energy densities. Their energy storage mechanism is widely understood to involve the traditional intercalation and conversion reaction. However,
Yan Liu, Yuanyuan Han, Shuxuan Liao, Fangchao Gu, Hengjun Liu, Xixiang Xu, Zhiqiang Zhao, Xiancheng Sang, Qinghao Li, Weijin Kong, Qiang Li   +10 more
doaj   +1 more source

Toward a Consistent Arctic Sea Ice Albedo Record From FengYun-3 Satellites

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Sea ice albedo is a crucial parameter affecting the radiation energy balance in the Arctic. Long-term, consistent albedo records are imperative for detecting and understanding Arctic climate change, but constructing them is hindered by biases between ...
Xiaohui Sun, Mingkun Liu, Shuguo Chen, Lei Guan   +3 more
doaj   +1 more source

A Fast Calibration Method for Phased Arrays by Using the Graph Coloring Theory

Sensors, 2018
Phased array radars are able to provide highly accurate airplane surveillance and tracking performance if they are properly calibrated. However, the ambient temperature variation and device aging could greatly deteriorate their performance.
Lijie Yang, Ruirui Dang, Min Li, Kailong Zhao, Chunyi Song, Zhiwei Xu   +5 more
doaj   +1 more source

Research on Hydrodynamics of Trans-Media Vehicles Considering Underwater Time-Varying Attitudes

Journal of Marine Science and Engineering
A trans-media vehicle is a new type of equipment that can adapt to two environments, water and air, to maintain optimal hydrodynamic and aerodynamic performance.
Shuo Liu, Chihao Du, Yijie Han, Yu Zhang, Wanglin Lin, Yong Cai, Tao Wang   +6 more
doaj   +1 more source

Noise Cancellation Method for Mud Pulse Telemetry Based on Discrete Fourier Transform

Journal of Marine Science and Engineering
Mud pulse telemetry (MPT) systems are widely recognized for their effectiveness and are most commonly used to transmit downhole data to the surface in real time. These data facilitate the drilling process and make it more cost-efficient.
Jingchen Zhang, Zitong Sha, Xingbin Tu, Zhujun Zhang, Jiang Zhu, Yan Wei, Fengzhong Qu   +6 more
doaj   +1 more source

Preparation of carboxyl-functionalized poly （methyl methacrylate） microspheres and their adsorption behavior towards methylene blue

Cailiao gongcheng
The carboxyl-functionalized poly（methyl methacrylate） microspheres were successfully synthesized via soap-free emulsion polymerization， utilizing methyl methacrylate and styrene as monomers， acrylic acid as functional monomer， and methyl methacrylate ...
ZHANG Linghui, GAO Min, GUO Shuang, YAN Xuefeng, YU Liangmin   +4 more
doaj   +1 more source

Monitoring ocean currents during the passage of Typhoon Muifa using optical-fiber distributed acoustic sensing

Nature Communications
In situ observations under typhoon conditions are sparse and limited. Distributed acoustic sensing (DAS) is an emerging technology that uses submarine optical-fiber (OF) cables to monitor the sea state.
Jianmin Lin, Sunke Fang, Runjing He, Qunshu Tang, Fengzhong Qu, Baoshan Wang, Wen Xu   +6 more
doaj   +1 more source

CASF-Net: Underwater Image Enhancement with Color Correction and Spatial Fusion

Sensors
With the exploration and exploitation of marine resources, underwater images, which serve as crucial carriers of underwater information, significantly influence the advancement of related fields.
Kai Chen, Zhenhao Li, Fanting Zhou, Zhibin Yu   +3 more
doaj   +1 more source