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20961
Proof of Inherent Intelligence Consensus Mechanism Empowering Blockchain-Enabled Transactive Energy
Published 2025-01-01“…We demonstrate PoII’s operation and performance with comprehensive mathematical modeling of energy pool-market trading and scheduling optimization problems. …”
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20962
Foreign trade of Russia and Vietnam: modern trends and prospects of development
Published 2020-12-01“…The study develops a mathematical model for forecasting exports and imports of Russia and Vietnam by individual indicators until 2025. …”
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20963
Assessment of Waterlogging Risk in the Deep Foundation Pit Projects Based on Projection Pursuit Model
Published 2020-01-01“…Then, a projection pursuit model optimized by particle swarm optimization is leveraged to determine the weights of the indicators and the best projection values of evaluation objects, and the mathematical function between the best projection values and the risk levels is constructed by an interpolation algorithm. …”
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20964
Design and Analysis of an Optical Coupler for Concentrated Solar Light Using Optical Fibers in Residential Buildings
Published 2016-01-01“…This study deals with designing and simulating a high-efficiency coupler, employing a mathematical model to connect sunlight with fiber optics for multiple applications. …”
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20965
Enterprise chart question and answer method based on multi modal cross fusion
Published 2025-01-01“…Through practical enterprise application cases, our method has shown its ability to answer four types of chart questions, exhibiting mathematical reasoning capabilities and providing robust support for enterprise data analysis and decision-making.…”
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20966
Visualization of solving problems with sequences of numbers: Statistical comparison of the two methods
Published 2021-01-01“…Exploring the quality of maths teaching in primary school, we found students' knowledge of using modern technologies but also the lack of visual-logical approach in solving mathematical problems. In this paper, we show how the establishment of figurative numbers and selected examples that demonstrate the observation of legality, can direct students to a visual-logical approach to solving tasks with sets of numbers. …”
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20967
Analysis for Variation Characteristics and Trends of Runoff and Sediment in Nandu River
Published 2020-01-01“…As the significant changes of both runoff and sediment content in many rivers in the changing environment,it's practical to analyze the variation characteristics and trends of runoff and sediment for predicting hydrologic situation exactly and identifying the influence mechanism effectively.Based on the data from the Santan Hydrological Station and Longtang Hydrological Station in Nandu River,this paper analyzes the variation characteristics and trends of runoff and sediment in Nandu River by mathematical statistical methods such as correlation analysis and trend analysis.The results show that:There is no significant change in total runoff of either Longtang or Santan Station from year to year.However,compared with 1977—1997,the amount of sediment transport at Longtang station decreased significantly from 1998 to 2007,which reduced about 33.82×10<sup>4</sup> t every year,accounting about 57.61%.The total runoff at Santan Station shows a downward trend,while that at Longtang Station has a slight downward trend.The amount of sediment transport at Santan Station does not change obviously,while that at Longtang Station reduces significantly.In addition,among the factors that affect the variation in runoff and sediment,precipitation is the main reason for the change in runoff,and sediment interception by reservoirs is an important reason for the decrease in sediment transport.…”
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20968
Bench Testing and Modeling Analysis of Optimum Shifting Point of HMCVT
Published 2021-01-01“…To decrease shift impact on agricultural tractors with HMCVT (Hydromechanical Continuously Variable Transmission) and find the best working point, the following methods are proposed in this paper: firstly, conducting all-factor method and response surface method (RSM) to design and carry out bench test of shift impact; secondly, using the basic linear fitting, RSM, and stepwise regression analysis to establish comprehensive mathematical models and selecting models with high prediction accuracy; thirdly, putting forward the method of determining the weight of variance to match parameters of three quality evaluation indexes with inconsistent correlation; finally, establishing the total shift quality evaluation index and obtaining the optimal shift working point. …”
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20969
Insights on Climate-Driven Fluctuations of Cave 222Rn and CO2 Concentrations Using Statistical and Wavelet Analyses
Published 2020-01-01“…For this purpose, we combined a set of mathematical methods that included a statistical and wavelet analysis of a 6-year time series in Rull Cave (Spain). …”
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20970
Accurate calculation of the content volume, density and original weight of museum curated eggs
Published 2024-12-01“…We found a negative correlation between D i and S/V (which reflects the egg metabolism level) and suggest that a female in most species maintains the duration of egg incubation at a constant level that has practically an unchanged value for the respective species. A mathematical algorithm for calculating the D i value depending on the S/V ratio provides the missing link in calculating W of a whole egg from archived collection material.…”
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20971
Determination of Optimum Conditions for the Production of Activated Carbon Derived from Separate Varieties of Coconut Shells
Published 2017-01-01“…The results from experiment and the developed mathematical model were both found to be in agreement giving the optimum concentration of phosphoric acid and pH for producing activated carbon to be 0.67 M and 2.07 for the tall tree variety and 1 M and 1.98 for the dwarf variety at optimum temperatures in the range of 450–575°C and 575°C, respectively.…”
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20972
Investigation of vibration protection system of a seat with quasi-zero stiffness under stochastic effects on the elements of running equipment of a motor grader
Published 2023-03-01“…With the help of a complex simulation mathematical model of a motor grader developed in the Matlab environment, including subsystems of vibration-protective cab supports, a vibration-protective mechanism of the operator's seat, setting stochastic effects on the elements of running equipment when moving along a microrelief, a computational experiment is carried out, when processing the results of which, the influence of a number of system parameters on the root-mean-square seat acceleration deviation in the vertical direction. …”
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20973
Distribution Law of In Situ Stress and Its Engineering Application in Gateroad Maintenance: A Case Study
Published 2022-01-01“…In this study, the stress relief method of hollow inclusion and mathematical-statistical analysis are used to study the in situ stress distribution law of the Guotun coal mine, and the optimization strategy of roadway support is put forward. …”
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20974
Cyclic surfaces accompanying non-ruled quadrics of rotation
Published 2023-09-01“…The geometric scheme of surface shaping is based on a construction that includes: a curvilinear axis of rotation and a one-parameter set of its normal planes; a generatrix whose points describe in normal planes circular trajectories centered on a curvilinear axis. A mathematical model of shaping the surface of non-linear rotation for the general case of specifying the axis of rotation and the generatrix is given. …”
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20975
Filters in 2D and 3D Cardiac SPECT Image Processing
Published 2014-01-01“…Image filtering, a mathematical processing, compensates for loss of detail in an image while reducing image noise, and it can improve the image resolution and limit the degradation of the image. …”
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20976
Stagnation and renewable growth of enterprises: an empirical analysis by sectors of the Russian economy
Published 2023-09-01“…The research methods are the calculation of economic coefficients and the identification of differences between them using methods of mathematical statistics. It was found that in an unfavorable external environment, significant proportion of Russian enterprises showed signs of stagnation or drop in sales. …”
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20977
A modelling technique to determine the high frequency transformer leakage inductance using the winding structure
Published 2025-01-01“…By not varying the average length of turns in the winding configuration, the proposed method was able to maintain a consistent copper loss. A modified mathematical model has been put forward to determine the leakage inductance effectively and precisely. …”
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20978
A novel predictive model for estimation of cell voltage in electrochemical recovery of copper from brass: Application of gene expression programming
Published 2020-01-01“…The modeling results confirmed that the proposed model is a powerful tool in designing a mathematical equation between the parameters of electrochemical dissolution and the voltage induced by variation of these parameters.…”
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20979
Integrated approach for estimating climate change impacts on CO2 sink capacity of inland waterbodies using hydrodynamic modelling and GIS analysis
Published 2025-01-01“…According to the developed approach, CO2 solubility under variable temperature and salinity is mathematically modelled and this model is further used with the developed hydrodynamic model data for Wadi El-Rayan Lakes (temperature, salinity and water depth) to estimate their CO2 sink capacities. …”
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20980
Direct Torque Control of Dual Three Phase Induction Motor fed by Direct Power Control Rectifier using Fuzzy Logic Speed Controller
Published 2025-01-01“…To tackle these challenges, we propose a fuzzy logic-based speed controller for DTC, which enhances adaptability to system dynamics without necessitating a precise mathematical model. The fuzzy logic controller (FLC) is particularly effective in regulating speed under varying load conditions, improving robustness, and minimizing torque ripple. …”
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