Utilization Of Marine Resources Research Articles

Digital Twins in the Marine Industry

The ocean holds abundant resources, but the utilization of those resources for the marine economy presents a complex and dynamic industrial situation. Exploring sustainable development in this industry is of practical value, as it involves the rational use of marine resources while protecting the environment. This study provides an innovative review of the current application status of Digital Twins Technology (DTT) in various sectors of the marine industry, including the ship-building industry (SBI), Offshore Oil and Gas Industry, marine fishery, and marine energy industry. The findings reveal that DTT offers robust support for full life cycle management (LCM) in SBI, including digital design, intelligent processing, operation, and error management. Furthermore, this work delves into the challenges and prospects of DTT application in the marine industry, aiming to provide reference and direction for intelligent systems in the industry and guide the rational development and utilization of marine resources in the future.

Research Progress and Prospect of Wave Attenuation Performance and Integration of Wave-Energy Converter of Floating Breakwater

A floating breakwater can significantly reduce the wave invasion of marine structures and provide a safe construction environment and service environment for wave attenuation protection for marine structures. With the development and utilization of marine resources, the application of floating breakwaters in engineering is becoming more and more important; research on integrated systems of a floating breakwater and wave-energy converter (WEC) is also valuable. However, existing research has not yet systematically improved the influencing factors of wave attenuation performance of floating breakwaters and the summary of the wave attenuation mechanism; there are few summaries about the integration of floating breakwaters and wave-energy converters. Therefore, the research progress on the wave attenuation performance and wave-energy integration of floating breakwaters is reviewed and summarized. Firstly, according to the structural shape, floating breakwaters are divided into three types: box type, floating cylinder type, and other types. Secondly, the wave attenuation performance of three types of breakwaters and the research progress of floating breakwater-WEC integrated devices are discussed and reviewed. Finally, the problems to be solved in the study of various breakwaters and the key directions for future research are summarized. This review is helpful to deepen the cognition and understanding of wave attenuation performance of floating breakwater and floating breakwater-WEC integration devices, which can provide reference for the optimization research and engineering application of floating breakwaters.

Research on the High-Quality Development of Approach to the Sea Economy

Marine economy is one of the important strategic directions of national development. In recent years, the high-quality development of my country's marine economy has made remarkable achievements, but at the same time it is also facing many problems. This paper takes the high-quality development of Xianghai economy as the research object, analyzes its development status and existing problems, and proposes corresponding solutions. Specifically, this paper discusses issues such as the development and utilization of marine resources, environmental protection, and industrial upgrading, and puts forward suggestions such as strengthening scientific and technological innovation, strengthening industrial cooperation, and promoting the construction of marine law, in order to provide reference for the high-quality development of my country's seaward economy.

Realizing high-efficient oxygen reduction reaction in alkaline seawater by tailoring defect-rich hierarchical heterogeneous assemblies

The development of efficient and stable oxygen reduction reaction (ORR) electrocatalysts in seawater electrolyte is the key to realizing marine resource utilization and expanding metal-air battery applications. Herein, defect-rich Fe-doped Co nanoparticles encapsulated by N-doped hierarchical carbon (D-FeCo@NHC) are rationally designed and synthesized. It is worth mentioning that the Fe doping helps to promote the generation of metal defect and adjust the electronic structure of D-FeCo@NHC. Density functional theory (DFT) demonstrate that the metal defect and carbon defect jointly optimize the d-band center of D-FeCo@NHC. As a result, in alkaline seawater electrolyte, D-FeCo@NHC display a half-wave potential of 0.874 V, and the assembled liquid Zn-air battery exhibit a high peak power density (173 mW cm−2) and ultra-long cycling stability (over 800 h). This work highlights the defect engineering in the construction of seawater-based oxygen reduction electrocatalysts, which provide a significant and promising approach for seawater-based metal-air cathode materials.

Research on Design System of Offshore Platform Accommodation Cabin Based on Kansei Engineering

_ Accommodation cabin is a living place for operators, and it should play a role in alleviating the fatigue and stress. This paper focuses on the problem of monotony and lack of emotional care in the design of accommodation, and develops a design system to meet the emotional needs of operators based on Kansei Engineering. First, the key design elements affecting emotional comfort are extracted and the virtual reality experimental platform is established. Second, the affective factors are extracted, constituting the semantic space. Third, the mapping relationship between affective factors and design elements is established. Finally, the design system of accommodation cabin based on the emotional needs is developed. The system can output and evaluate the design scheme through virtual reality technology, so it makes the design process more intuitive and efficient. It has a certain reference value for improving the comfort experience of operators and the design level of accommodation cabin. Introduction Offshore platform is an important guarantee for territorial development and utilization of marine resources. As offshore platform is relatively special, it has particular structure that is different from buildings on land. It is made of steel and equipped with a lot of large equipment, so it is relatively closed. During offshore operation, operators need to work and life on offshore platforms for a long time. Monotonous working condition and long-term alienation from terrestrial landscape and relatives will have impact on their physical and mental health (Xu et al. 2013). According to the survey, about 13% of the workers who have worked on the platform for more than 10 years will have psychologic or behavioral abnormalities (Wu 2015). It has affected their normal life, and even increased the safety risk.

Preparation of fish decalcified bone matrix and its bone repair effect in rats.

Decalcified bone matrix has great potential and application prospects in the repair of bone defects due to its good biocompatibility and osteogenic activity. In order to verify whether fish decalcified bone matrix (FDBM) has similar structure and efficacy, this study used the principle of HCl decalcification to prepare the FDBM by using fresh halibut bone as the raw material, and then degreasing, decalcifying, dehydrating and freeze-drying it. Its physicochemical properties were analyzed by scanning electron microscopy and other methods, and then its biocompatibility was tested by in vitro and in vivo experiments. At the same time, an animal model of femoral defect in rats was established, and commercially available bovine decalcified bone matrix (BDBM) was used as the control group, and the area of femoral defect in rats was filled with the two materials respectively. The changes in the implant material and the repair of the defect area were observed by various aspects such as imaging and histology, and its osteoinductive repair capacity and degradation properties were studied. The experiments showed that the FDBM is a form of biomaterial with high bone repair capacity and lower economic cost than other related materials such as bovine decalcified bone matrix. FDBM is simpler to extract and the raw materials are more abundant, which can greatly improve the utilization of marine resources. Our results show that FDBM not only has a good repair effect on bone defects, but also has good physicochemical properties, biosafety and cell adhesion, and is a promising medical biomaterial for the treatment of bone defects, which can basically meet the clinical requirements for bone tissue repair engineering materials.

Antimicrobial peptides from marine animals: Sources, structures, mechanisms and the potential for drug development

The emergence of antibiotic-resistant bacteria has become a major challenge in current clinical treatment. As essential natural molecules involved in innate immunity, antimicrobial peptides (AMPs) have the potential to break the limits of antibiotic resistance. While AMPs are widely presented in various organisms on this planet, the marine environment is unique in generating a large number of AMPs that exhibit characteristic structures and functions. This review summarizes the structures and mechanisms of action of AMPs derived from invertebrates, fish, amphibians, reptiles, and mammals in the ocean. The comparison of AMPs from organisms in different habitats demonstrates the preference of Arg (arginine) and Leu (leucine) in marine AMPs, which might be associated with the adaptation to the unique features of bacterial membranes in marine environments. In addition, the potential and applications of marine AMPs for the development of novel antibiotics are also described. These summaries are expected to provide a reference for the development and utilization of marine resources in drug development or aquiculture.

Deep learning-based marine big data fusion for ocean environment monitoring: Towards shape optimization and salient objects detection

ObjectiveDuring the last few years, underwater object detection and marine resource utilization have gained significant attention from researchers and become active research hotspots in underwater image processing and analysis domains. This research study presents a data fusion-based method for underwater salient object detection and ocean environment monitoring by utilizing a deep model.MethodologyA hybrid model consists of an upgraded AlexNet with Inception v-4 for salient object detection and ocean environment monitoring. For the categorization of spatial data, AlexNet is utilized, whereas Inception V-4 is employed for temporal data (environment monitoring). Moreover, we used preprocessing techniques before the classification task for underwater image enhancement, segmentation, noise and fog removal, restoration, and color constancy.ConclusionThe Real-Time Underwater Image Enhancement (RUIE) dataset and the Marine Underwater Environment Database (MUED) dataset are used in this research project’s data fusion and experimental activities, respectively. Root mean square error (RMSE), computing usage, and accuracy are used to construct the model’s simulation results. The suggested model’s relevance form optimization and conspicuous item prediction issues in the seas is illustrated by the greatest accuracy of 95.7% and low RMSE value of 49 when compared to other baseline models.

Trend oceanography research for enhancing ocean literacy to support sustainable development goals (SDGs): A systematic literature review

The ocean, as the most extensive ecosystem on the planet, holds significant importance in environmental sustainability. This study aims to review and compare research investigations into articles regarding oceanography research through a systematic literature review (SLR). This SLR follows the five-step procedures Denyer and Tranfield (2009) proposed. A search was conducted in the Scopus database using the terms “oceanography, ocean literacy (OL), and the Sustainable Development Goals (SDGs)” in the disbursement menu, resulting in the retrieval of 145 articles. In addition, 20 papers satisfied the established criteria for analysis. The findings of this observation article are in the form of research trends regarding oceanography research. Most oceanography research is in the distribution year category 2022 (5 articles). Most prominent authors originate from the United Kingdom (9 articles) and America (8 articles). Collaborative research is more common (85%). Most research articles are published in the journal Marine Policy. The dominant fields of study are Social Sciences (45%) and Environmental Sciences (30%). Oceanography research has a very important role in increasing OL and Supporting the attainment of SDGs, especially SDG 14, which emphasizes the need to protect and utilize marine resources sustainably.

Zoning System in Biodiversity Conservation and Marine Ecological Sustainability: An Emic Perspective of the Bajo People in Southeast Sulawesi

The spirit of fisheries modernization or known as the blue revolution is to transform traditional fishing communities into modern fishermen. This paradigm aims to utilize marine resources in a modern way to increase the income of fishing communities in particular, and the income of the State in general. However, in its implementation, the use of maritime resources tends to lead to massive exploitation, thus causing damage to biodiversity and threatening ecological sustainability. Therefore, it is necessary to manage sustainable marine resources as carried out by the Bajo people. This study aims to describe the zoning system in marine resource conservation, the values of local wisdom contained in the marine conservation system, and its benefits in ecological sustainability. Methodologically, this study uses a qualitative approach, a type of ethnography. Data was collected through a process of in-depth interviews and observations. There are three main issues in the findings of this research. First, there are three zoning systems in the management of marine resources in the Bajo community, namely: sacred zone (Toroh Pamali), coral conservation zone (Tubba Dikatutuang), and free fishing zone (Sapa). Second, the existence of the zoning system is based on the local wisdom values of the Bajo community in Sama Bahari Village, including social, economic, and ecological values. Third, the existence of the zoning system to date is considered quite effective in maintaining the ecological, social, and economic sustainability of the Bajo community in Wakatobi Regency, Southeast province.

Chemical compositions of bivalves shells: Anadara senilis, Crassostrea gasar, and Mytilus edulis and their potential for a sustainable circular economy

The paradigm termed circular blue economy has become a concept that is greatly associated with the utilization of marine resources to ensure continued sustainability. Several constraints and limitations related to plants and plant products means human needs to look beyond green economy. The chemical constituents of animals also allow researchers to evaluate their growth and development. This study evaluates the proximate and chemical compositions of Anadara senilis, Crassostrea gasar, and Mytilus edulis, with emphasizes on their calcium and calcium carbonate contents and industrial importance. A total of 270 live bivalve samples were collected from March to May 2021 from Lagos Lagoon harbour. Each bivalve sample collected was opened to separate the flesh from the species’ shell, sun-dried and transported to the laboratory for analysis. One-way analysis of variance was adopted to estimate the significance level at 5% (P < 0.05). Post-HOC LSD test was performed to verify the disparity of mean. The results of this study revealed that Mytilus edulis shells had the highest moisture, crude protein, and crude fat at 1.15 ± 0.05%, 4.29 ± 0.43%, and 0.96 ± 0.15%, respectively and showed significant difference (P < 0.05). Anadara senilis shells had high levels of calcium (51.00 ± 2.87 mg/kg), magnesium (0.59 ± 0.23 mg/kg) and calcium carbonate (60.91 ± 2.50 mg/kg). Due to the high Ca and CaCO3 contents obtained, these shells can be processed alongside other biomaterials into food supplements, animal feeds, dental products, plant nutrient supplements, ornamental purpose, construction, agricultural industries among others. These would enhance the development of cottage industries, promotes farming of shell animals, help to alleviate the unemployment crisis and creation of wealth from substances which would have been regarded as waste.

Game of Marine Natural Resources Management: A strategy for Determining Rights Registration

The unified right confirmation and registration of natural resources in sea areas (URCRNRSA) has been considered a key approach to the effective management and sustainable utilization of marine resources. In China, the system of URCRNRSA is insufficient due to the lack of central auditing supervision and public participation. In this study, the mechanism of stakeholder interaction is clarified based on the game relationship among the tripartite of the central government, local governments, and the public. The evolutionary process of tripartite decision-making is simulated with an evolutionary game model. On this basis, the strategic choices of the tripartite were analyzed in the four evolutionary scenarios of high-quality URCRNRSA. It was demonstrated that the tripartite could jointly affect the URCRNRSA through cooperation-constraint, principal-agent, and incentive-compatibility relationships. The most effective, realistic, and feasible URCRNRSA strategy was the trinity system with local government high-quality rights confirming, the central government auditing as a hard constraint and the public participating as a soft constraint. The main influencing factors for the tripartite to make different strategy selections were clarified through parameter sensitivity analysis, including cost, benefit, reward, and punishment. Accordingly, the policy recommendations were put forward to ensure the stable and efficient implementation of the URCRNRSA in China.

Is China’s Fishing Capacity Management Sufficient? Quantitative Assessment of China’s Efforts toward Fishing Capacity Management and Proposals for Improvement

As the country with the world’s largest fishing capacity, China suffers from the depletion of living marine resources, mainly caused by overexploitation, the effects of which also distinctly influence global sustainable utilization of marine resources and maritime order. The country has implemented a series of measures to control its national fishing capacity, notably since the late 1980s, and strongly expressed its responsibility and commitment to sustainable resource utilization in the 13th Five-Year Plan (2016–2020). This study quantitatively assesses the effect of China’s fishing capacity management efforts by examining changes in the fishing capacity of marine capture fisheries by region from 1979 to 2019 in Chinese waters, based on window data envelopment analysis (DEA), and further proposes directions for policy adjustment. The results suggest that China’s coastal and offshore fisheries are still subject to overcapacity of approximately 20%, despite major corrective efforts invested in past decades. This implies that China needs to further improve its fishing capacity management and set clear objectives, as determined by the availability of resources and regional features. Global fisheries management’s focus is shifting from input to output control, but overcapacity still threatens the sustainable use of fisheries resources in China and poses obstacles to other systems.

Investigation of mechanical strength and permeability characteristics of pervious concrete mixed with coral aggregate and seawater

The availability of the conventional raw materials required to produce pervious concrete on sea islands remote from the mainland is lacking, which could be alleviated by utilizing marine resources. This study aimed to develop seawater coral aggregate pervious concrete (SCAPC) by utilizing coral waste and seawater and assess the potential application of this method to sea islands. The SCAPC specimens were designed with different coral aggregate sizes (2.36–4.75 mm, 4.75–9.5 mm) and aggregate/binder ratios (2, 2.5, 3), and the addition of 10 % of sea sand. The physical properties (hardened density and porosity), mechanical strengths (compressive and splitting tensile strengths), water permeability, and sulfate attack resistance were investigated. The failure surface under mechanical loading and the microtopography between matrix and coral aggregate of SCAPC samples were also characterized. The results showed that the compressive strength and water permeability coefficient of the resulting SCAPCs at 28 days with a porosity ranging from 16.9 % to 33.5 % could reach 6.2–18.5 MPa and 12.9–26.5 mm/s, respectively. This not only satisfied the ACI 522R-recommended values for pervious concrete applicable to pedestrian road areas, but the samples demonstrated excellent permeability. The SCAPC specimens manufactured with aggregate/binder ratios of 2.5 incorporating 10 % sea sand were found to achieve the required balance between compressive strength (11.8–12.5 MPa) and water permeability coefficient (19.6–20.9 mm/s). The failure patterns of the SCAPC samples presented a markedly different complete fracture of coral aggregate point from that of traditional aggregate pervious concrete, ascribing this variation to the characterized fragility of coral aggregate and intensified interfacial adhesion.

Blood removal and water behavior in horse mackerel Trachurus japonicus muscle using water perfusion

Blood removal is widely applied in the fisheries and aquaculture industries because it maintains the quality of fish muscle during storage, which improves the market value and effective utilization of marine resources. Water perfusion, such as Tsumoto-shiki, has recently attracted attention as a novel blood removal procedure; however, its detailed effect has not been clarified thus far. Herein, to utilize water perfusion as a novel blood removal technology, the influence of water perfusion according to Tsumoto-shiki with modifications, for 4–60 s on the blood removal and water behavior in horse mackerel Trachurus japonicus muscle was investigated compared with that of a sample conventionally bled by cutting the gill. The results were subjected to multiple comparison tests using the Tukey–Kramer method. The hemoprotein content in the perfused sample was significantly lower than that in the control sample without blood removal and the bled sample (p < 0.05), independent of the perfusion time. The moisture content and expressible drip in the perfused sample increased in a perfusion time-dependent manner. Low-field nuclear magnetic resonance (LF-NMR) measurements showed that 1H T2 relaxation time was prolonged in samples perfused for 30–60 s (p < 0.05). In 1H T2-weighted images obtained using magnetic resonance imaging (MRI), high signal intensities were mainly observed in the dark muscle and segmental arteries and veins of samples perfused for 30–60 s, indicating the presence of free water that leaked from blood vessels. Therefore, water perfusion is an effective procedure for blood removal compared with conventional bleeding. Furthermore, in this study, water perfusion for 4–10 s was appropriate for both removing blood and preventing the quality deterioration induced by increased moisture content and expressible drip in horse mackerel muscle.

Comparative Study of Marine Ranching Recognition in Multi-Temporal High-Resolution Remote Sensing Images Based on DeepLab-v3+ and U-Net

The recognition and monitoring of marine ranching help to determine the type, spatial distribution and dynamic change of marine life, as well as promote the rational utilization of marine resources and marine ecological environment protection, which has important research significance and application value. In the study of marine ranching recognition based on high-resolution remote sensing images, the convolutional neural network (CNN)-based deep learning method, which can adapt to different water environments, can be used to identify multi-scale targets and restore the boundaries of extraction results with high accuracy. However, research based on deep learning still has problems such as rarely considering the feature complexity of marine ranching and inadequate discussion of model generalization for multi-temporal images. In this paper, we construct a multi-temporal dataset that describes multiple features of marine ranching to explore the recognition and generalization ability of the semantic segmentation models DeepLab-v3+ and U-Net (used in large-area marine ranching) based on GF-1 remote sensing images with a 2 m spatial resolution. Through experiments, we find that the F-score of the U-Net extraction results from multi-temporal test images is basically stable at more than 90%, while the F-score of DeepLab-v3+ fluctuates around 80%. The results show that, compared with DeepLab-v3+, U-Net has a stronger recognition and generalization ability for marine ranching. U-Net can identify floating raft aquaculture areas at different growing stages and distinguish between cage aquaculture areas with different colors but similar morphological characteristics.

Unity Engine 기반 수중 로봇 3차원 포지셔닝 프로그램 구현

A number of studies related to underwater robots are being conducted to utilize marine resources. However, unlike ordinary drones, underwater robots have a problem that it is not easy to locate because the medium is water, not air. The monitoring and positioning program of underwater robots, an existing study for identifying underwater locations, has difficulty in locating and monitoring in small spaces because it aims to be utilized in large spaces. Therefore, in this paper, we propose a three-dimensional positioning program for continuous monitoring and command delivery in small spaces. The proposed program consists of a multi-dimensional positioning monitoring function and a ability to control the path of travel through a three-dimensional screen so that the depth of the underwater robot can be identified. Through the performance evaluation, a robot underwater could be monitored and verified from various angles with a 3D screen, and an error within the assumed range was verified as the difference between the set path and the actual position is within 6.44 m on average.

Regulatory effects of marine polysaccharides on gut microbiota dysbiosis: A review.

The gut microbiota dysbiosis is a state which the physiological combinations of flora are transformed into pathological combinations caused by factors such as diets, pollution, and drugs. Increasing evidence shows that dysbiosis is closely related to many diseases. With the continuous development and utilization of marine resources, marine polysaccharides have been found to regulate dysbiosis in many studies. In this review, we introduce the types of dysbiosis and the degree of it caused by different factors. We highlight the regulating effects of marine polysaccharides on dysbiosis as a potential prebiotic. The mechanisms of marine polysaccharides to regulate dysbiosis including protection of intestinal barrier, regulatory effect on gut microbiota, alteration for related metabolites, and some other possible mechanisms were summarized. And we aim to provide some references for the high-value utilization of marine polysaccharides and new targets for the treatment of gut microbiota dysbiosis by this review.

Construction and application of bionic antifouling coatings inspired by soft coral

AbstractMarine biofouling will bring a series of environmental and social problems, which restrict the development and utilisation of marine resources. Therefore, how to prevent biofouling has become a global issue. With the exploration of antifouling methods, bionic antifouling technology with environmentally friendly, broad‐spectrum, and long‐term advantages has gradually attracted people's attention. Inspired by the antifouling strategy of soft coral (Sarcophyton trocheliophorum), the silicone rubber (RTV‐2) with similar elasticity to coral skin was selected as the substrate. The composite structure of the upper transparent layer and the lower porous layer was prepared by simulating the structure of soft coral as the structural factors of the bionic antifouling coatings. Meanwhile, several organic antifouling components with high content contained in soft coral were added to the transparent layer and porous layer, respectively, as the component factors of biomimetic coatings. The bionic antifouling coatings, which are highly consistent with the coral structure, obtained the best antifouling performance under static and dynamic conditions. The above results provide new ideas for the synthesis of environmentally friendly bionic antifouling coatings.

Assessing the conjugacy of the marine economy-ecology-society composite system: China’s Case

As of now, the development and utilization of marine resources have entered a new stage of “refinement, orderliness, and high quality”. It has become a top priority to coordinate the relationship among marine economy, ecology, and society. At the same time, the comprehensive evaluation of the conjugacy of the marine composite system has replaced the single evaluation that only relies on economic indicators to measure the operation effect of the marine system. The operational effect of the marine system needs to be comprehensively measured from three aspects: the profitability of the marine economic subsystem, the sustainability of the marine ecological subsystem and the effectiveness of the marine social subsystem. The combination of composite ecosystem theory and conjugate ecosystem theory was applied to the marine economic-ecological-social composite system, the concept of “conjugate degree of marine composite system” was proposed, the conjugate mechanism of marine composite system subsystem was discussed, the conjugate degree measurement model and prediction model of marine composite system were constructed, the conjugate degree measurement index system of marine composite system was constructed, and the cases of China’s coastal areas were empirically analyzed. The empirical results show that 1) the conjugation degree of the marine composite system in Shandong Province is in a steady growth and “moderate conjugation” state. 2)The conjugation degree of marine composite systems in China’s coastal areas is mostly in the state of “low conjugation”. 3)The balance development of the three subsystems of marine economy, ecology and society is the basic premise of the high conjugate degree of the marine composite system.4) It is unscientific and unreasonable to measure the development of the marine system by the gross marine product. Finally, the policy recommendations for the conjugate development of the marine composite system were proposed. The multi-objective comprehensive evaluation of ocean system operation was explored to provide decision support and policy basis for promoting the balanced, sustainable and high-quality development of ocean system.