It is critical to forecast the electric load for a region. Traditional electric load forecasting frequently predicts the load of multiple transformers in the region after directly summing them, but directly predicting...
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ISBN:
(纸本)9781665490542
It is critical to forecast the electric load for a region. Traditional electric load forecasting frequently predicts the load of multiple transformers in the region after directly summing them, but directly predicting the total load after accumulating the load of each distribution transformer will weaken the individual time-series characteristics and reduce prediction accuracy, so it is necessary to forecast the total load of the region while appropriately retaining the individual time-series characteristics. To address the aforementioned issues, this paper clusters transformer load curves, narrows the load characteristics of the same category of transformers using the weighting concept. It stores the load characteristics of multiple transformers in a neural network. This paper develops a virtual transformer load forecasting model in which the sum of all transformer loads in the region is a number of times the virtual transformer load forecasting result.
In order to improve the reliability of the cold chain logistics supply chain and shorten the response time of the supply chain, a quality evaluation method of agricultural cold chain logistics supply chain based on k-...
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Sports competition data analysis and strategy optimization are important ways to enhance athlete competitiveness and team collaboration. The current competition analysis and strategy formulation have strong subjectivi...
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Sports competition data analysis and strategy optimization are important ways to enhance athlete competitiveness and team collaboration. The current competition analysis and strategy formulation have strong subjectivity, making it difficult to deeply understand the performance characteristics and patterns of athletes and teams. Traditional analysis methods cannot accurately identify the performance differences of different athletes, and there are limitations in their feature recognition and classification. In order to enhance the scientificity of strategy formulation and improve the performance of athletes in competitions, this article combined the k-means clustering algorithm and focused on basketball sports to conduct an in-depth analysis of sports competition data analysis and strategy optimization. Firstly, the competition data was collected and preprocessed. Then, feature selection was carried out from three dimensions: competition results, player performance, and team characteristics. Finally, the k-means clustering algorithm was used to perform hierarchical clustering on the original data through a hierarchical method. To verify its effectiveness, this article conducted practical analysis on the data of nearly 5 basketball competitions in 10 university basketball leagues in a certain province and optimized strategies based on cluster analysis. The results showed that in terms of player performance, compared to before optimization, the average number of rebounds, assists, and steals of team players optimized based on algorithm strategy increased by about 38.9%, 25.0%, and 63.2%, respectively. The conclusion indicates that the application of k-means clustering algorithm in sports competition data analysis and strategy optimization can help improve the competitive level of athletes and enhance their performance.
Through the spectrum noise logging technology, the oil field is dynamically monitored, and according to its simple logging instrument and convenient operation, the position of the outer channeling of the casing can be...
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Through the spectrum noise logging technology, the oil field is dynamically monitored, and according to its simple logging instrument and convenient operation, the position of the outer channeling of the casing can be qualitatively judged by the abnormal noise of the measurement record, and the downhole production status of the water injection well can be accurately diagnosed. Fully grasp the problems of oil casing leakage, outer channeling and packer leakage in water injection wells, and enrich downhole operations. In this paper, the downhole noise signal data are standardized, and the k-means clustering algorithm is used to classify the downhole noise signal according to the correlation coefficient of different frequencies to obtain the low-frequency noise signal, and the low-frequency noise signal is clustered twice to obtain the channeling frequency band and the reservoir fluid frequency band. The accurate channeling frequency range is determined and conforms to the domestic and foreign research data. The channeling frequency band is processed by wavelet threshold, and the useless noise in the channeling frequency band is eliminated. The channeling noise signal curve after processing is analyzed, and the main output layers have an obvious amplitude back channeling. The k-means clustering algorithm is used to analyze the channeling frequency band, and the channeling noise is processed by wavelet threshold. It is a new noise signal curve processing method, which provides a new idea for the spectrum noise logging technology to master the problem of channeling outside the pipe in the water injection well.
Traditional high school English textbooks often need to be revised to address the varied learning preferences of students, resulting in disparities in teaching efficacy. This study takes the 2020 Yilin Edition of the ...
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ISBN:
(纸本)9798350375343;9798350375336
Traditional high school English textbooks often need to be revised to address the varied learning preferences of students, resulting in disparities in teaching efficacy. This study takes the 2020 Yilin Edition of the high school English textbook as an example for analysis due to its widespread use and adherence to contemporary educational standards. It aims to remedy these gaps by applying a cluster-based analytical method to reform textbook content, focusing on individual differences. Through a detailed analysis of language difficulty, content breadth, and stylistic differences, the cluster-based analytical method reveals hidden patterns in textbook content distribution that provide empirical support for adjusting textbook structure and allocating personalized content. The findings indicate that this method effectively identifies textbook imbalances while offering a scientific direction for optimizing course design. The research underscores the utility of data mining in education and propounds an advisable methodology for advancing high school English instruction.
This study analyses the data structure in cluster analysis. It is a clustering method that randomly selects a known number of points and then continues to expand. Through the comparative experiments on the clustering ...
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This study analyses the data structure in cluster analysis. It is a clustering method that randomly selects a known number of points and then continues to expand. Through the comparative experiments on the clustering accuracy of different similarity matrices, the experimental analysis on the effectiveness of the model, the distribution of e-commerce data under cloud computing and the calculation time of different clusteringalgorithms, we can better understand the k-means clustering algorithm and the status of e-commerce in cloud computing environment. The experimental results show that if the appropriate similarity function is selected, the result of spectral clustering is usually not lower than that of simple k-meansclustering. When the number of users reaches 4000, the list reading time of the k-means clustering algorithm is 3.15 s, while the other three algorithms consume more time.
In order to overcome the problems of time-consuming, low-precision and redundant rules in association rule mining of big data, a parallel association rule mining method based on an improved k-meansclustering algorith...
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In order to overcome the problems of time-consuming, low-precision and redundant rules in association rule mining of big data, a parallel association rule mining method based on an improved k-means clustering algorithm is proposed. Establish a data object criterion function and optimise k-means clustering algorithm. The improved k-means clustering algorithm is used to cluster big data and improve the efficiency of mining association rules. This paper introduces the matter-element theory of extension, combines matter-element theory and database, and constructs the matter-element relation database model of extension to realise the mining of parallel association rules in big data on the basis of extension. Redundant algorithms and equivalent transformations are used to eliminate redundant association rules. The experimental results show that the proposed method has high mining efficiency, high mining accuracy, and high rule association, which proves that the proposed method has better application performance.
This paper proposes a method for optimizing prediction models based on the ARIMA time series and the k-means clustering algorithm to address the challenge of solving world puzzle games. The method aims to offer player...
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ISBN:
(纸本)9798350387780;9798350387797
This paper proposes a method for optimizing prediction models based on the ARIMA time series and the k-means clustering algorithm to address the challenge of solving world puzzle games. The method aims to offer players a diverse range of challenges by anticipating and predicting imbalances in difficulty and content in advance. To achieve this, the paper first establishes an ARIMA time series model to fit the data and calculate the goodness of fit. Subsequently, employing keywords such as vowels, consonants, word composition, and usage, the k-means clustering algorithm is applied to compute the clustering center of the data and generate a clustering result graph. Finally, different regression models were established for the characteristics of various difficulty samples, and the words were digitally encoded. The least squares method was used for fitting. Faced with different attempts, a reasonable prediction interval was obtained based on the analysis results. Experimental results indicate that, in comparison to traditional algorithms, the proposed method demonstrates higher accuracy in predicting word attribute classifications. The findings of this research offer an effective approach for game developers to manage puzzle game difficulty, enabling better balancing of game challenges and enhancing the gaming experience and engagement for players.
Transport mode detection in urban areas with the help of mobile phones is not anymore, a challenging problem. Most studies via machine and deep learning models using GPS and inertial mobile sensors can distinguish dif...
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ISBN:
(纸本)9781665455305
Transport mode detection in urban areas with the help of mobile phones is not anymore, a challenging problem. Most studies via machine and deep learning models using GPS and inertial mobile sensors can distinguish different modes with various prediction accuracies. This paper presents a new way to count the number of stations in metro trips using a magnetometer sensor where GPS, internet, and wireless positioning are unavailable. The primary source for this investigation was recorded via mobile magnetometer sensor of metro riders. We first find contextual features that can effectively recognize acceleration state according to the 3D magnetometer data and then classification with a k-means unsupervised method into different classes. Finally, we present a station counter algorithm to count the number of metro stations in metro-based trips. Results from experiments in Rome and Stockholm metro systems show that our final algorithm can count the number of stations with an accuracy of 86 % where there is no internet, GPS, and WiFi access.
The wellbore flow analysis of optical fiber vibration signal depends on distributed optical fiber logging. Distributed optical fiber logging technology identifies the fluid in the well through distributed optical fibe...
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The wellbore flow analysis of optical fiber vibration signal depends on distributed optical fiber logging. Distributed optical fiber logging technology identifies the fluid in the well through distributed optical fiber acoustic sensor (DAS) and distributed optical fiber temperature sensor (DTS). Distributed optical fiber sensor has the advantages of small underground interference, high efficiency and low cost. In this paper, the wellhead data extracted by the distributed optical fiber acoustic sensor is used to calculate the upper bound of the fluid sound frequency band in the pipe by nonlinear least squares fitting. The k-means clustering algorithm is used to cluster the optical fiber vibration signals in the low frequency band. According to the clustering results, the ratio of the optical fiber signal eigenvalues of each production layers is obtained, and the trend of the ratio of the optical fiber signal eigenvalues of each production layers is judged to be close to the trend of the water absorption intensity. Compared with traditional acoustic logging, the wellbore flow analysis using distributed optical fiber acoustic sensor can quickly determine the production contribution of each layer and the change of fluid phase state in the production cycle. Combined with traditional production logging technology, distributed optical fiber logging shows its reliability and accuracy in data collection, logging interpretation and production application. Starting from the principle of distributed optical fiber acoustic sensing technology, this paper briefly expounds the properties of distributed optical fiber acoustic sensor and the principle of injection profile logging, systematically introduces the processing of distributed optical fiber acoustic data, and emphatically introduces the accuracy of k-means clustering algorithm for analyzing distributed optical fiber acoustic signal and qualitative judgment of production layer, which provides a new idea for judging the accura
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