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1421
Gaussian Process Regression Total Nitrogen Prediction Based on Data Decomposition Technology and Several Intelligent Algorithms
Published 2023-01-01“…Total nitrogen (TN) is one of the important indicators to reflect the degree of water pollution and measure the eutrophication status of lakes and reservoirs.To improve the accuracy of TN prediction,based on the empirical wavelet transform (EWT) and wavelet packet transform (WPT) decomposition technology,this paper proposes a Gaussian process regression (GPR) prediction model optimized by osprey optimization algorithm (OOA),rime optimization algorithm (ROA),bald eagle search (BES) and black widow optimization algorithm (BWOA) respectively.Firstly,the TN time series is decomposed into several more regular subsequence components by EWT and WPT respectively.Then,the paper briefly introduces the principles of OOA,ROA,BES,and BWOA algorithms and applies OOA,ROA,BES,and BWOA to optimize GPR hyperparameters.Finally,EWT-OOA-GPR,EWT-ROA-GPR,EWT-BES-GPR,EWT-BWOA-GPR,WPT-OOA-GPR,WPT-ROA-GPR,WPT-BES-GPR,WPT-BWOA-GPR models (EWT-OOA-GPR and other eight models for short) are established to predict the components of TN by the optimized super-parameters.The final prediction results are obtained after reconstruction,and WT-OOA-GPR,WT-ROA-GPR,WT-BES-GPR and WT-BWOA-GPR models based on wavelet transform (WT) are built.Eight models,including EWT-OOA-SVM based on support vector machine (SVM),the paper compares the unoptimized EWT-GPR,WPT-GPR models,and the uncomposed OOA-GPR,ROA-GPR,BES-GPR,and BWOA-GPR models.The models were verified by the monitoring TN concentration time series data of Mudihe Reservoir,an important drinking water source in China,from 2008 to 2022.The results are as follows.① The average absolute percentage error of eight models such as EWT-OOA-GPR for TN prediction is between 0.161% and 0.219%,and the coefficient of determination is 0.999 9,which is superior to other comparison models,with higher prediction accuracy and better generalization ability.② EWT takes into account the advantages of WT and EMD.WPT can decompose low-frequency and high-frequency signals at the same time.Both of them can decompose TN time series data into more regular modal components,significantly improving the accuracy of model prediction,and the decomposition effect is better than that of the WT method.③ OOA,ROA,BES,and BWOA can effectively optimize GPR hyperparameters and improve GPR prediction performance.…”
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1422
Spatiotemporal Distribution of Phytoplankton Functional Groups in Baihua Reservoir: Implications for Ecosystem Management
Published 2025-03-01“…The succession rate (SR) and the average variation degree (AVD) of the functional groups were determined, and the corresponding driving factors were analyzed by using the Random Forest model, hierarchical partitioning, and Mantel test. …”
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1423
Solid Sr2Ti1-xMnxO4 (x = 0; 0,01; 0,025; 0,05; 0,1) solutions with K2NiF4 structure
Published 2024-12-01“…Formate complexes of the corresponding metals synthesized by an original method were used as precursors. The products of thermolysis of the obtained complexes with an organic ligand are isostructural single-phase samples, which crystallize as agglomerates with an average size of 1 μm. …”
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1424
Synergistic effect of artificial intelligence and new real-time disassembly sensors: Overcoming limitations and expanding application scope
Published 2025-01-01“…First, relevant parameter data of a certain enterprise’s generator can be collected on-site, and the Pearson correlation coefficient method can be used to calculate the correlation between the generator data parameters and the target fault type, ensuring the degree of correlation in extracting data features. …”
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1425
Netosis in patients with systemic lupus erythematosus
Published 2020-12-01“…Nitroxide-producing properties were determined using the Crow (1999) method in spontaneous and stimulated samples for the accumulation of the nitrated amino acid tyrosine (3-nitrothyrosine, 3-NTBAS, and 3-NTST, respectively). …”
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1426
THE ROLE OF ANTICOAGULATION THERAPY IN PATIENTS WITH PROSTHETIC HEART VALVES
Published 2016-09-01“…Cardiac surgery is the only radical method of treatment of valvular defects (congenital or acquired): valve preservation procedures or prosthetics operations. 250 000 – 280 000 valve prostheses are implanted every year worldwide, while the number of prosthetic valves operation increases by an average of 5–7 % per year (biological prostheses – 8–11 %, mechanical prostheses – 3–5 %). …”
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1427
A Hybrid Gaze Distance Estimation via Cross-Reference of Vergence and Depth
Published 2024-01-01“…The findings showed that the proposed method significantly outperformed current methods with a visual angle error of 0.132 degrees under ideal conditions. …”
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1428
Bilateral middle ear cholesteatoma in children: A single-center retrospective study
Published 2025-09-01“…Objectives: To analyze the clinical characteristics of bilateral cholesteatoma in children and summarize the clinical treatment pathway. Methods: In this retrospective cohort study, we analyzed the records of children with bilateral middle ear cholesteatoma who underwent surgery in our department between 2016 and 2023. …”
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1429
Nutritionally adequate, healthy, and climate-friendly diets following the Nordic Nutrition Recommendations 2023: an optimization study for Norway
Published 2025-05-01“…Still, dietary change in favor of plant foods is a controversial climate mitigation measure, especially in the Nordic region where agri-food heritage is linked to ruminant husbandry.ObjectiveIn this study we aimed to explore sustainable diets for the Norwegian context by (1) investigating the environmental impacts of nutritionally optimized diets following the Nordic Nutrition Recommendations 2023 (NNR2023), (2) estimating potential for environmental impact reduction across scenarios of meat and legume consumption, and (3) identifying nutritional challenges.MethodsQuadratic optimization was employed to minimize departure from the average observed Norwegian diet while meeting nutrient, health, and carbon footprint constraints. …”
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1430
Clinical and Epidemiological Manifestations of Ixodic Tick-Borne Borreliosis Foci in the Tomsk region
Published 2022-09-01“…The number of requests annually averages 20.8 thousand. As a result of an annual study using PCR tests of ticks taken from people who applied to emergency prevention centers, Borrelia DNA was detected on average in 40% of samples; blood samples from individuals affected by tick bites were positive on average in 3.7% of cases. …”
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1431
Effect of the Protein Composition of Whole Nutrition Food for Special Medical Purposes on in Vitro Digestion Properties and Cell Calcium Transport Promotion
Published 2025-08-01“…In vitro digestion study was conducted following the international INFOGEST method and the samples were subsequently analyzed for free α-amino acid content, degree of hydrolysis, peptide sequences, and amino acid composition. …”
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1432
Investigation of the Nanoparticles Motion Modes within the Framework of Stochastic System
Published 2012-10-01“…Within the framework of the phase-plane method the kinetics of the transition between the modes of the nanoparticles motion was investigated.…”
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1433
POSSIBILITIES OF DIAGNOSIS OF RADIATION INJURIES AND REHABILITATION OF PATIENTS AFTER COMBINED TREATMENT OF MALIGNANT TUMORS OF THE BREAST
Published 2016-03-01“…Traditional means of rehabilitation (silicone-biological prosthetics) have a number of significant shortcomings in the form of discomfort from the displacement of the prosthesis – 33.6%, a heavy feeling of foreignness and – 43.3%, raising the temperature in the area of operational scar an average of 2.5 degrees. Innovative Rehabilitation (adhesive siliconebiological prosthetics) show a decrease in the incidence of edema of the hand to 8.3% – the emergence of the feeling of comfort and identity in 84.1% -providing reduce body temperature in the operating scar to normal values.…”
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1434
Investigating the concentration of heavy metals and their health risk assessment in the water resources of northwestern Iran
Published 2025-07-01“…The probability of carcinogenicity of water consumption with the monitored concentration of arsenic metal in the studied area has a high risk. According to the average of all monitored metal concentrations, there is a possibility of carcinogenicity in different degrees in all water sources. …”
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1435
Investigating Job Hardiness and Its Related Factors Among Emergency Medical Technicians in Qom, Iran
Published 2025-03-01“…A significance level of less than 0.05 was deemed statistically significant. Findings: The average age of participants was 32.26 ± 6.34 years, with over two-thirds having bachelor's degrees and working rotating shifts. …”
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1436
Development of specific competencies in gymnastics in specialized higher education
Published 2024-02-01“…Grade A3: third year - specialization discipline ”Methods of teaching gymnastics in school”. Grades B1 and C1: ”Didactics of gymnastics I” (first semester). …”
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1437
Factores de riesgo asociados al dolor de espalda en escolares de entre 10 y 12 años de Mallorca (Risk factors associated with low back pain among schoolchildren aged 10-12 years in...
Published 2010-01-01“…The questionnaire and method for gathering the data were previously validated using the test-rest reliability method. …”
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1438
Removal of the Textile Dye Indanthrene Olive Green from Aqueous Solution Using Chitosan
Published 2009-12-01“…The chitosan was characterised in terms of its average degree of de-acetylation (DD) and by XRD, TGA/DTG, IR, SEM and specific BET surface area methods. …”
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1439
Time to pregnancy recognition among users of an FDA-cleared fertility application
Published 2024-12-01“…Most participants (with non-missing information) identified as Non-Hispanic White, and one-third reported obtaining a university degree. We used two-tailed Welch’s t-test, Mann–Whitney U-test, and two-tailed Z-tests to compare time to pregnancy recognition between those using the app to conceive or contracept.Results Participants using an app to conceive recognised pregnancy on average at 31.3 days from last menstrual period (LMP) compared to 35.9 days among those using the app to prevent pregnancy.Conclusion Generalisability is limited, as all participants were using a fertility app and had relatively homogenous sociodemographic characteristics.…”
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1440
The effect of statin therapy on oxidative stress indices in patients with arterial hypertension and type 2 diabetes mellitus
Published 2018-02-01“…Objective: to study the effect of statin therapy on the oxidative and antioxidant systems parameters in patients with arterial hypertension (AH) and concomitant type 2 diabetes mellitus (DM2T). Materials and methods. 126 patients (55 males and 71 females, average age was 57.8 ± 6.2 years) with AH stage II and compensated DM2T were divided into 2 groups: the 1 group – with AH and DM2T (n = 69), who were constantly taking statins (rosuvastatin 10 mg/day or atorvastatin 20 mg/day) for at least 1 year; the 2 group – patients with AH and DM2T (n = 57) who did not take statins. …”
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