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681
Optimal Control Systems by Time-Dependent Coefficients Using CAS Wavelets
Published 2009-01-01“…This paper considers the problem of controlling the solution of an initial boundary-value problem for a wave equation with time-dependent sound speed. …”
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682
Anomaly detection model for multivariate time series based on stochastic Transformer
Published 2023-02-01“…Aiming at the problem that the existing multivariate time series anomaly detection models based on variational autoencoders could not propagate long-term temporal dependencies between stochastic variables in latent space, the stochastic Transformer for MTS anomaly detection (ST-MTS-AD) model which combined Transformer encoder with VAE was proposed.In the inference network of the ST-MTS-AD, the MTS long-term temporal dependent features generated by Transformer encoder and the sampled values of the stochastic variables at the previous moment were inputted into the multilayer perceptron, the approximate posterior distribution of the stochastic variables at the current moment was generated by the multilayer perceptron, and the temporal dependencies between stochastic variables were realized.The gated transition function(GTF) was used to generate the prior distribution of stochastic variables.The generation network of the ST-MTS-AD reconstructed the distribution of the MTS values at each moment by the multilayer perceptron whose input was the MTS long-term temporal dependent features generated by the inference network and the approximate posterior sampling values of stochastic variables.The distribution of normal MTS dataset was learned by the variational inference technology, and the abnormal MTS segment was determined by the log-likelihood of the reconstruction probability.Experiments on four public datasets show that the ST-MTS-AD model significantly improves the F1 score over the typical baseline models.…”
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683
Influence of status of heart rate autonomic control on the course of the post-infarction period and cardiac rehabilitation
Published 2019-12-01“…The comparison group of 79 healthy volunteers was necessary to determine the normal ranges of heart rate variability. One hundred and twenty patients on the 7th-9th day, the 24th and the 48th week of STEMI underwent a 12-lead Holter monitoring with an assessment of time parameters of heart rate variability. …”
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684
Research on Vehicle Path Planning Method with Time Windows in Uncertain Environments
Published 2024-12-01“…Practical constraints like time windows and load capacity are incorporated, and uncertain variables, such as carbon emission factors, are modeled using normal distributions. …”
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685
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Recursive Estimation of the Expectile-Based Shortfall in Functional Ergodic Time Series
Published 2024-12-01“…More preciously, we assume that the input-variable is valued in a pseudo-metric space, output-variable is scalar and both are sampled from ergodic functional time series data. …”
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687
ESTIMATION OF THE ADDED VALUE OF WHEAT CROP PRODUCTION IN NINEVEH GOVERNORATE FOR THE AGRICULTURAL SEASON 2019-2020
Published 2022-12-01“…The results of the research indicated that there are problems and obstacles with regard to the process of preparing the state for production requirements for farmers in terms of inappropriate timings for cultivation and low quantities distributed, This leads to higher variable costs than production costs. and the presence of delays in the process of marketing and receiving the yield from the silos, The study recommends early development of the agricultural plan, opening centers to collect the crop in the harvest season, close to the farms in order to reduce costs and facilitate the marketing process, and work to develop a marketing mechanism and the receipt of the crop by the silos, and expedite the process of disbursing the financial dues to farmers.…”
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688
Updated plant hardiness zones for Canada and assessment of change over time
Published 2025-07-01Get full text
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689
Observer Design for RIP Stability Using Takagi-Sugeno Fuzzy Model and Mean Value Theorem
Published 2025-02-01“…By combining the differential mean value theorem with sector nonlinearity transformation, the observer guarantees robust performance in the presence of unmeasured premise variables. …”
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690
AFFECTING FACTORS OF AGRICULTURAL GDP VALUE IN IRAQ AND NEIGHBORING ARAB COUNTRIES DURING (1980-2010)
Published 2018-03-01“…In order to prove the hypothesis of this search a number of economic factors that vary in their impact on the value of agricultural GDP and of (b crop area planted, the number of agricultural workers, agricultural tractors, combine harvesters agricultural, fertilizer, chemical, agricultural loans, farm subsidies, the exchange rate) had been selected the data had been used from those for time - series variables standing thirty -one-year– old. …”
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691
Community- and government-managed marine protected areas increase fish size, biomass and potential value.
Published 2017-01-01“…We also assessed protection effects on the potential monetary value of fish; a variable that increases non-linearly with fish body mass and is particularly important from a fishery perspective. …”
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692
Teachers’ generative AI self-efficacy, valuing, and integration at work: Examining job resources and demands
Published 2024-12-01“…Among 368 Australian primary and secondary school teachers, our findings revealed that genAI support was associated with greater genAI self-efficacy and genAI valuing. Time pressure was also linked with greater genAI valuing, whereas disruptive student behavior was not linked with the genAI motivation or engagement variables. …”
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693
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Causal relationship between renewable energy consumption and manufacturing value added: Evidence from Kazakhstan
Published 2025-05-01“…The aim of the study is to assess the direction and nature of causality between these variables over the period from 2000 to 2021. To this end, the Toda-Yamamoto Granger causality test is applied, offering robust results regardless of the order of integration of the time series data. …”
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696
Procedure Time of Endovascular Thrombectomy as Performance Measure of Acute Stroke Treatment
Published 2025-07-01“…PT <60 minutes was significantly associated with successful recanalization after adjusting for confounding variables (aOR: 1.66, 95% CI: 1.33–2.07). Moreover, after adjusting for covariates, age≥65 years (aOR: 1.20, 95% CI: 1.05–1.38), onset-to-door time (aOR: 1.03, 95% CI: 1.01–1.04), door-to-puncture time (aOR: 1.05, 95% CI: 1.03–1.06), posterior circulation stroke (PCS) (aOR: 1.13, 95% CI: 1.02–1.28), and smoking (aOR: 1.24, 95%CI: 1.09–1.45) independently predicted PT ≥60 minutes. …”
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697
Ready-to-eat mango and peanut bar as a value-added alternative for producers and market demand
Published 2025-06-01“…A three-component mixture design was applied: mango (74–88 %), peanut (7–20 %), and walnut (1–5 %), with extreme vertices and two process variables (temperature and time). An optimized mango bar with dehydrated fruit was made under conditions of 60 °C for 3 h and a mixture of 85.8, 8.7, 3.5, and 2 % mango, peanut, walnut, and almond, respectively. …”
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698
Modelling of non-scheduled air transportation time series based on ARIMA
Published 2024-12-01“…To forecast non-scheduled air transportation demand, historical data, including relevant variables are firstly collected. The data are processed by identifying and addressing any missing values, outliers, or trends that could affect the model's performance. …”
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699
Performance analysis of butanol-diesel blends in internal combustion engines as pathway to bioenergy integration toward sustainability goals
Published 2025-07-01“…This study examines the performance, combustion, and emission characteristics of butanol-diesel blends (B10–B40) in a single-cylinder compression ignition (CI) engine across variable operating conditions. A particular focus is placed on evaluating the influence of injection pressure (200–260 bar) and timing (20°–26° bTDC) to identify optimal parameters for cleaner combustion. …”
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700
Real-time classification of EEG signals using Machine Learning deployment
Published 2024-12-01“…Machine learning has emerged as a powerful tool for simplifying the analysis of complex variables, enabling the effective assessment of the students' concentration levels based on specific parameters. …”
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