Results 31 to 40 of about 3,061,369 (332)

Application of ultra-high performance concrete in the marine environment [PDF]

E3S Web of Conferences
The development and utilization of marine resources are becoming the focus of all countries. However, the special characteristics of the marine environment pose severe durability challenges to traditional concrete materials.
Zhang Jingtong
doaj   +1 more source

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

FEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini, Nicolò Antonelli, Gianluca Molla   +2 more
wiley   +1 more source

Project plan and research progress on key technologies of seismic zoning in sea areas

地震科学进展, 2020
China is located between the circum-Pacific seismic belt and the Mediterranean-Himalayan seismic belt, the tectonic activity in both the land and sea areas is very strong.
Xiaojun Li, Su Chen, Zhikun Ren, Yuejun Lü, Huawei Tong, Zengping Wen   +5 more
doaj   +1 more source

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Advanced Underwater Measurement System for ROVs: Integrating Sonar and Stereo Vision for Enhanced Subsea Infrastructure Maintenance

Journal of Marine Science and Engineering
In the realm of ocean engineering and maintenance of subsea structures, accurate underwater distance quantification plays a crucial role. However, the precision of such measurements is often compromised in underwater environments due to backward ...
Jiawei Zhang, Fenglei Han, Duanfeng Han, Jianfeng Yang, Wangyuan Zhao, Hansheng Li   +5 more
doaj   +1 more source

Understanding bio‐based polymers: A study of origins, properties, biodegradation and their impact on health and the environment

FEBS Open Bio, EarlyView.
This review provides an overview of bio‐based polymer sources, their unique functional properties and their environmental impact, and addresses their role as sustainable alternatives. It discusses end‐of‐life options, including composting and anaerobic digestion for renewable energy.
Sabina Kolbl Repinc, Blaž Stres, Mirica Karlovits, Igor Karlovits, Petra Jerič, Ondrej Panák, Anja Verbič, Blaž Likozar, Uroš Novak   +8 more
wiley   +1 more source

An Improved Heave Compensation Algorithm for Strapdown INS in Marine Operations

Applied Sciences
Heave compensation is crucial for the improvement of marine engineering. However, there remain two main drawbacks in existing methods. One drawback is that the output accuracy of heave information is insufficient.
Qianqian Gao, Bixin Cai
doaj   +1 more source

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

A large temperature-controlled static and dynamic mechanical testing apparatus on marine soil-structure interfaces for marine engineering

Frontiers in Marine Science
Marine soil–structure interfaces are commonly encountered in marine engineering, where they are inevitably subjected to temperature variations and complex stress conditions, including static, dynamic, and creep loads.
Bowen Yang, Kaiwei Xu, Kun Tan, Peng Cui, Peng Cui, Xianhui Feng   +5 more
doaj   +1 more source

A modular plasmid toolkit applied in marine bacteria reveals functional insights during bacteria-stimulated metamorphosis

mBio, 2023
A conspicuous roadblock to studying marine bacteria for fundamental research and biotechnology is a lack of modular synthetic biology tools for their genetic manipulation.
Amanda T. Alker, Morgan V. Farrell, Alpher E. Aspiras, Tiffany L. Dunbar, Andriy Fedoriouk, Jeffrey E. Jones, Sama R. Mikhail, Gabriella Y. Salcedo, Bradley S. Moore, Nicholas J. Shikuma   +9 more
doaj   +1 more source