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  • 1
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publication Date: 2024-04-14
    Description: Accurate energy forecasting is important to facilitate the decision-making process in order to achieve higher efficiency and reliability in power system operation and security, economic energy use, contingency scheduling, the planning and maintenance of energy supply systems, and so on. In recent decades, many energy forecasting models have been continuously proposed to improve forecasting accuracy, including traditional statistical models (e.g., ARIMA, SARIMA, ARMAX, multi-variate regression, exponential smoothing models, Kalman filtering, Bayesian estimation models, etc.) and artificial intelligence models (e.g., artificial neural networks (ANNs), knowledge-based expert systems, evolutionary computation models, support vector regression, etc.). Recently, due to the great development of optimization modeling methods (e.g., quadratic programming method, differential empirical mode method, evolutionary algorithms, meta-heuristic algorithms, etc.) and intelligent computing mechanisms (e.g., quantum computing, chaotic mapping, cloud mapping, seasonal mechanism, etc.), many novel hybrid models or models combined with the above-mentioned intelligent-optimization-based models have also been proposed to achieve satisfactory forecasting accuracy levels. It is important to explore the tendency and development of intelligent-optimization-based modeling methodologies and to enrich their practical performances, particularly for marine renewable energy forecasting.
    Keywords: QA75.5-76.95 ; T58.5-58.64 ; Ensemble Empirical Mode Decomposition ; Brain Storm Optimization ; asset management ; institutional investors ; state transition algorithm ; kernel ridge regression ; energy price hedging ; multi-objective grey wolf optimizer ; five-year project ; complementary ensemble empirical mode decomposition (CEEMD) ; active investment ; portfolio management ; Long Short Term Memory ; time series forecasting ; LEM2 ; improved complete ensemble empirical mode decomposition with adaptive noise (ICEEMDAN) ; feature selection ; Markov-switching GARCH ; condition-based maintenance ; substation project cost forecasting model ; Gaussian processes regression ; deep convolutional neural network ; individual ; wind speed ; empirical mode decomposition (EMD) ; crude oil prices ; artificial intelligence techniques ; intrinsic mode function (IMF) ; multi-step wind speed prediction ; support vector regression (SVR) ; short term load forecasting ; energy futures ; General Regression Neural Network ; metamodel ; sparse Bayesian learning (SBL) ; commodities ; ensemble ; comparative analysis ; crude oil price forecasting ; electrical power load ; differential evolution (DE) ; fuzzy time series ; kernel learning ; short-term load forecasting ; data inconsistency rate ; renewable energy consumption ; long short-term memory ; energy forecasting ; modified fruit fly optimization algorithm ; forecasting ; combination forecasting ; Markov-switching ; weighted k-nearest neighbor (W-K-NN) algorithm ; hybrid model ; interpolation ; particle swarm optimization (PSO) algorithm ; regression ; diversification ; thema EDItEUR::U Computing and Information Technology::UY Computer science
    Language: English
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  • 2
    Publication Date: 2023-12-21
    Description: The information fusion technique can integrate a large amount of data and knowledge representing the same real-world object and obtain a consistent, accurate and useful representation of that object. The data may be independent or redundant, and can be obtained by different sensors at the same time or at different times. A suitable combination of investigative methods can substantially increase the profit of information in comparison with that from a single sensor. Multi-sensor information fusion has been a key issue in sensor research since the 1970s and it has been applied in many fields, such as geospatial information systems, business intelligence, oceanography, discovery science, intelligent transport systems, wireless sensor networks, etc. Recently, thanks to the vast development in sensor and computer memory technologies, more and more sensors are being used in practical systems and a large amount of measurement data are recorded and restored, which may actually be the "time series big data". For example, sensors in machines and process control industries can generate a lot of data, which have real, actionable business value. The fusion of these data can greatly improve productivity through digitization. The goal of this Special Issue is to report on innovative ideas and solutions for the methods of multi-sensor information fusion in the emerging applications era, focusing on development, adoption and applications.
    Keywords: TK1-9971 ; The structure and/or levels of multi-sensor fusion system ; Remote sensing data processing ; Information (speech or image ; Uncertain information integration ; Tracking from multi-sensor system ; The basic theory of the information fusion ; Knowledge cognitive based on multi-sensor system ; Possibility theory and other reasoning methods ; etc.) fusion processing ; Modeling by the big data from multi-sensor system ; Fusion decision theory ; bic Book Industry Communication::K Economics, finance, business & management::KN Industry & industrial studies::KNB Energy industries & utilities
    Language: English
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  • 3
    Publication Date: 2023-02-16
    Description: Here we represent pore water, headspace gas, and TOC data from the four cores recovered from the Chukchi Sea by Jumbo Piston Corer (JPC) during the ARA06C Expedition in 2015 to investigate the origin and diagenesis of pore water and gas. The study cores were retrieved from the Chukchi Sea Shelf (ARA06C-JPC01), the Northwind Basin (ARA06C-JPC02), the East Siberia Continental Slope (ARA06C-JPC03), and the Chukchi Basin (ARA06C-JPC04). We collected pore water from Site ARA06C-JPC01, ARA06C-JPC02, ARA06C-JPC03, and ARA06C-JPC04 and performed compositional and isotopic analyses (e.g. major cation and anions, oxygen, and deuterium isotope, carbon-13 isotope of dissolved carbon, 87Sr/86Sr). The analyzed results of pore water were displayed in the PW Table. The compositional and isotopic data of headspace gas (e.g. methane concentration, and carbon-13 isotope of methane and carbon dioxide) from Site ARA06C-JPC01, ARA06C-JPC02, ARA06C-JPC03, and ARA06C-JPC04 as well as TOC content of bulk sediment from Site ARA06C-JPC01, were represented in the HS Table and TOC Table, respectively.
    Keywords: ARA06C Expedtion; Chukchi Sea; Headspace Gas; pore water; TOC
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 4
    Publication Date: 2023-02-16
    Description: Gas composition in the headspace gas was measured by an Agilent 7890A gas chromatograph with flame ionization detector in the KIGAM. The carbon isotopic ratios of CH~4~ and carbon dioxide (CO~2~) in eadspace gases were analyzed using a compound-specific isotope ratio-monitoring gas chromatograph/mass spectrometer at Isotech Laboratories Inc., USA.
    Keywords: ARA06C; ARA06C Expedtion; ARA06C-JPC01; ARA06C-JPC02; ARA06C-JPC03; ARA06C-JPC04; Araon; Chukchi Basin; Chukchi Sea; Chukchi shelf; Cruise/expedition; DATE/TIME; DEPTH, sediment/rock; East Siberia continental slope; Event label; Gas chromatograph, Agilent 7890, coupled with a flame ionization detector; Headspace Gas; Isotope ratio-monitoring gas chromatograph/mass spectrometer; JPC; Jumbo Piston Core; LATITUDE; LONGITUDE; Methane; pore water; Ratio; Sample ID; TOC; δ13C, carbon dioxide; δ13C, methane
    Type: Dataset
    Format: text/tab-separated-values, 100 data points
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  • 5
    Publication Date: 2023-02-16
    Description: Cl- and alkalinity were determined by visual titration with 0.1 M AgNO~3~ and 0.02 M HCl, respectively. NH~4~+ and PO~4~3 were measured spectrophotometrically (UV-2450, Shimazu) at 640 and 885 nm, respectively. Sulfate (SO~4~2-) was analyzed by an ion chromatography (ICS-1500, Dionex) in the Korea Institute of Geoscience and Mineral Resources (KIGAM). Major and minor cations (Na^, K, Mg^2+, Ca^2+, Ba^2+, B, Sr^2+^, and H~4~SiO~4~) were analyzed by an inductively coupled plasma-optical emission spectrometer (Optima 8300 ICP-OES, Perkin Elmer) in the Korea Basic Sciences Institute (KBSI). δ^18^O~H2O~ and δD~H2O~ were determined with a wavelength-scanned cavity ring-down spectroscopy (L2120-i, Picarro Inc.) in the KIGAM. δ^13^C~DIC~ was analyzed with a Finnigan DELTA-Plus mass spectrometer using a Gas-Bench II automated sampler at Oregon State University. 87^Sr/^86^Sr ratio was measured using a Neptune multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS, Thermo Scientific) in the KBSI. The δ^11^B signatures were analyzed with a Neptune MC-ICP-MS in the St. Andrews Isotope Geochemistry Laboratory.
    Keywords: Alkalinity, total; Ammonium; ARA06C; ARA06C Expedtion; ARA06C-JPC01; ARA06C-JPC02; ARA06C-JPC03; ARA06C-JPC04; Araon; Barium; Boron; Calcium; Chloride; Chukchi Basin; Chukchi Sea; Chukchi shelf; Cruise/expedition; DATE/TIME; DEPTH, sediment/rock; East Siberia continental slope; Event label; Finnigan GasBench II, Delta Plus V IRMS; Headspace Gas; ICP-OES, Perkin-Elmer, Optima 8300; Ion chromatograph, Dionex Corporation, ICS-1500; JPC; Jumbo Piston Core; LATITUDE; LONGITUDE; Magnesium; MC-ICP-MS (Thermo Scientific, Neptune); Phosphate; pore water; Potassium; Sample comment; Sample ID; Silicic acid; Sodium; Strontium; Strontium-87/Strontium-86 ratio; Sulfate; Titration; TOC; δ11B; δ13C, dissolved inorganic carbon; δ18O; δ Deuterium
    Type: Dataset
    Format: text/tab-separated-values, 1112 data points
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  • 6
    Publication Date: 2023-02-16
    Keywords: ARA06C; ARA06C Expedtion; ARA06C-JPC01; Araon; Carbon, organic, total; Chukchi Sea; Chukchi shelf; DATE/TIME; DEPTH, sediment/rock; Event label; Headspace Gas; JPC; Jumbo Piston Core; LATITUDE; LONGITUDE; pore water; Rock-Eval 6 (Vinci Technologies); Sample ID; TOC
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
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  • 7
    Publication Date: 2023-09-02
    Description: We present geochemical data collected from volcanic ash-bearing sediments on the upper slope of the northern Hikurangi margin during the RV SONNE SO247 expedition in 2016. Gravity coring and seafloor drilling with the MARUM-MeBo200 allowed for collection of sediments down to 105 meters below seafloor (mbsf). Release of dissolved Sr2+ with isotopic composition enriched in 86Sr (87Sr/86Sr minimum = 0.708461 at 83.5 mbsf) is indicative of ash alteration. This reaction releases other cations in the 30-70 mbsf depth interval as reflected by maxima in pore-water Ca2+ and Ba2+ concentrations. In addition, we posit that Fe(III) in volcanogenic glass serves as an electron acceptor for methane oxidation, a reaction that releases Fe2+ measured in the pore fluids to a maximum concentration of 184 μM. Several lines of evidence support our proposed coupling of ash alteration with Fe-mediated anaerobic oxidation of methane (Fe-AOM) beneath the sulfate-methane transition (SMT), which lies at ∼7 mbsf at this site. In the ∼30-70 mbsf interval, we observe a concurrent increase in Fe2+ and a depletion of CH4 with a well-defined decrease in C-CH4 values indicative of microbial fractionation of carbon. The negative excursions in C values of both DIC and CH4 are similar to that observed by sulfate-driven AOM at low SO concentrations, and can only be explained by the microbially-mediated carbon isotope equilibration between CH4 and DIC. Mass balance considerations reveal that the iron cycled through the coupled ash alteration and AOM reactions is consumed as authigenic Fe-bearing minerals. This iron sink term derived from the mass balance is consistent with the amount of iron present as carbonate minerals, as estimated from sequential extraction analyses. Using a numerical modeling approach we estimate the rate of Fe-AOM to be on the order of 0.4 μmol cm−2 yr−1, which accounts for ∼12% of total CH4 removal in the sediments. Although not without uncertainties, the results presented reveal that Fe-AOM in ash-bearing sediments is significantly lower than the sulfate-driven CH4 consumption, which at this site is 3.0 μmol cm−2 yr−1. We highlight that Fe(III) in ash can potentially serve as an electron acceptor for methane oxidation in sulfate-depleted settings. This is relevant to our understanding of C-Fe cycling in the methanic zone that typically underlies the SMT and could be important in supporting the deep biosphere.
    Keywords: Center for Marine Environmental Sciences; DSRV SONNE; Hikurangi Margin; MARUM; MeBo200; Methane; New Zealand; SlamZ project; SO247; stable carbon isotopic composition; Tuaheni slide complex
    Type: Dataset
    Format: application/zip, 8 datasets
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  • 8
    Publication Date: 2023-08-12
    Description: This data set contains concentrations of major cations and anions in the pore fluid as well as boron stable isotopic ratios (d11B), stable oxygen and hydrogen isotopes of pore fluid (d18O and dD). Sediment samples were collected by using the seafloor drill rig MARUM-MeBo70 onboard 'RV MARIA S. MERIAN'.
    Keywords: CAGE; Center for Marine Environmental Sciences; Centre for Arctic Gas Hydrate, Environment and Climate; MARUM
    Type: Dataset
    Format: application/zip, 10 datasets
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  • 9
    Publication Date: 2024-02-02
    Keywords: Center for Marine Environmental Sciences; Core; DEPTH, sediment/rock; DIC; Dissolved inorganic carbon; GeoB21621-1; Lunde pockmark; Maria S. Merian; MARUM; MeBo; MeBo (Meeresboden-Bohrgerät); MSM57; MSM57/1; MSM57/1_633-1; Optional event label; Sample ID; stable carbon isotopic composition; Vestnesa Ridge; δ13C, dissolved inorganic carbon
    Type: Dataset
    Format: text/tab-separated-values, 21 data points
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  • 10
    Publication Date: 2024-02-02
    Keywords: Center for Marine Environmental Sciences; Core; DEPTH, sediment/rock; DIC; Dissolved inorganic carbon; GeoB21610-1; Lunde pockmark; Maria S. Merian; MARUM; MeBo; MeBo (Meeresboden-Bohrgerät); MSM57; MSM57/1; MSM57/1_622-1; Optional event label; Sample ID; stable carbon isotopic composition; Vestnesa Ridge; δ13C, dissolved inorganic carbon
    Type: Dataset
    Format: text/tab-separated-values, 27 data points
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