Smart fisheries are an important way to promote the sustainable development of fisheries, and efficient reliable marine communication systems key realizing smart fisheries. As emerging technology, VHF Data Exchange System (VDES) has advantages a high data transmission rate, large capacity, wide coverage, providing new opportunities for transformation upgrading This paper introduces technical architecture functions VDES, compares it with existing technologies, analyzes requirements fishery,...

Artificial reefs (ARS) are structures placed in the ocean, and their posture position affect placement effect of reef. Quantitative data on reef can provide references for creation a favorable environment marine organisms. This paper focuses improving quality assessment methods deployment ARS habitats. Based images detected by forward-looking sonar, new method is proposed to determine three-dimensional effectiveness reefs, with aim obtaining more detailed information about assist evaluating...

Rapid acquisition of the spatial distribution soil nutrients holds great implications for farmland productivity safety, food security and agricultural management. To this end, we collected 1297 samples measured content total nitrogen (TN), available phosphorus (AP) potassium (AK) in Zengcheng, north Pearl River Delta, China. Hyperspectral remote sensing images (115 bands) Chinese Environmental 1A satellite were used as auxiliary variables dimensionality reduction was performed using Pearson...

Pacific sardine (Sardinops sagax) is a commercially important species and supports fisheries in the Northwest Ocean (NPO). Understanding habitat distribution patterns of great significance for fishing ground prediction stock management. In this study, both single-algorithm ensemble models were established through Biomod2 package by combining occurrence data, sea surface temperature (SST), height (SSH), salinity (SSS) chlorophyll-a concentration (Chla) NPO during main season (June–November)...

An accurate estimation of soil organic matter (SOM) content for spatial non-point prediction is an important driving force the agricultural carbon cycle and sustainable productivity. This study proposed a hybrid geostatistical method extreme learning machine-ordinary kriging (ELMOK), to predict variability SOM content. To assess feasibility ELMOK, case was conducted in regional scale area Shaanxi Province, China. A total 472 topsoil (0–20 cm) samples were collected. 14 auxiliary variables...

Standardized catch per unit effort (CPUE) data not only yield precise and biologically meaningful abundance indices but also provide crucial insights into the spatio-temporal distribution of fisheries resources, critical for their sustainable utilization management. In this study, we integrated chub mackerel fishery statistics from Northwest Pacific Ocean (NPO) marine remote sensing environmental data, constructed CPUE standardization models based on generalized linear mixed model (GLMM)...

The purpleback flying squid (Sthenoteuthis oualaniensis) is an economically significant cephalopod species in the Northwest Indian Ocean. Predicting its fishing grounds can provide a crucial foundation for fishery management and production. In this research, we collected data from China’s light-purse seine Ocean 2016 to 2020 train validate AlexNet VGG11 models. We designed partitioning method (DPM) divide training set into three scenarios, namely DPM-S1, DPM-S2, DPM-S3. Firstly, DPM-S1 was...

This research evaluates the potential spaces of deep offshore waters for cultivating Larimichthys crocea, analyzing ocean profile temperature data from 2000 to 2022 according species' environmental suitability. There are significant seasonal variations and differences in habitat distributions different ranges China's surrounding waters. The range maximum living space obtained tolerance shows a trend being larger summer smaller winter; viable based on suitable optimal winter. Broad areas...

The Northwest Indian Ocean is a key fishing ground for China’s pelagic fisheries, with the purpleback flying squid being significant target. This study uses commercial logs of between 2015 and 2021, alongside seawater temperature its vertical difference within 0–200 m depth range, to construct generalized additive models (GAMs) gradient boosting tree (GBTs). These two are evaluated using cross-validation assess their ability predict distribution squid. findings show that factors like year,...

In order to further analyze the impact of marine environment factors in Northwest Pacific Ocean on distribution chub mackerel Scomber japonicus resources, a spatio-temporal weighted regression model was constructed based environmental and fishery data China's light purse seine production high seas Ocean. Six factors, including sea surface temperature (SST), chlorophyll concentration (Chl-a), eddy kinetic energy (EKE), SST gradient intensity (GSST), longitudinal (xGSST) latitudinal (yGSST)...

Understanding the spatial patterns of neon flying squid is important for monitoring and management fishery resources. Mesoscale eddies Kuroshio Extension play roles in variation fishing ground Ommastrephes bartramii. However, way which influence distribution bartramii requires further understanding. In this study, activity change gravity were analyzed using automatic identification system (AIS) data. There a positive correlation between latitudinal direction indicators based on...

The decadal spatio-temporal distribution of the fishing effort and catch per unit (CPUE) for Chilean jack mackerel, Trachurus murphyi, stock are poorly understood. Data from Chinese mackerel fleet was used to describe location relationship between standardized CPUE sea surface temperatures (SST) during period 2001–2010. A significant change in observed study period. From January March, average generally <15 tonnes (t) net, except 2007–2009. increased significantly autumn-winter (April...

Torque ripple and acoustic noise are two major drawbacks to switched reluctance motors. The abrupt change of phase current is main cause noise, while both commutation wave shape factors contributing high torque ripple. In order simultaneously reduce a specific modulation based on real inductance profile can be employed recently proposed pseudo-sinusoidal motor (PSSRM). Performance comparison including ripple, efficiency with conventional square half-sine modulations investigated. performance...

With the repaid urbanization process, scattered existence of urban construction land and over use restrict healthy development city. The remote sensing monitoring can help to monitor layout realize meticulous management land. Based on Worldview-2 high resolution image, combined with Bayesian algorithm classification regression tree (CART) algorithm, this paper objectively classified Haizhu district, Guangzhou city, China. results showed that segmentation scale was 40, color parameter 0.8,...

Zhang, S.; Tang, F.; Fan, W.; Yang, Zhu, H., and Cui, X., 2023. Analysis of hauling net hours for Gazami crab (Portunus trituberculatus) gillnets based on the Beidou vessel monitoring system (BDVMS). Journal Coastal Research, 39(4), 663–674. Charlotte (North Carolina), ISSN 0749-0208. Gillnets are among most widely used fishing gear in world, there nearly 97 thousand gillnetters China's offshore. With decline resource fisheries, quota has remained a topic concern world's nations. At...

Low efficiency as a special kind of urban construction land, which inhibits the blind expansion boundaries and achieves land intensive high efficiency. In this paper, information feature classification low-cost use was carried out by combining Worldview-2 resolution remote sensing images in 2011 2016, located central business district (CBD) Tianhe Guangzhou city, China. Based on extraction results low dynamic changes. The showed that multi-scale segmentation better when scale 15, color...