In this paper, we propose a combination of k-means algorithm and Particle Swarm Optimization (PSO) method. The k-means algorithm is utilized for data clustering. On one hand, the number of clusters (k) should be deter...
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(纸本)9798350314557
In this paper, we propose a combination of k-means algorithm and Particle Swarm Optimization (PSO) method. The k-means algorithm is utilized for data clustering. On one hand, the number of clusters (k) should be determined by expert or found by try-and-error procedure in the k-means algorithm. On the other hand, initial centroids and number of clusters (k) are influenced on the quality of resulted grouping. Therefore, the aim of the proposed procedure is using PSO and the Structural Similarity Index (SSIM) criterion as a fitness function in order to find the best value for k parameter and better initial clusters' center. Due to different value of k parameter, the number of initial centroids which should be produced is variant. Thus, length of particles in PSO method may be different in each iteration. Experimental results show the superiority of this approach in comparison with standard k-means algorithm and both of them are evaluated on image segmentation problem.
The latest research in the field of recognition of image characters has led to various developments in the modern technological works for the improvement of recognition rate and precision. This technology is significa...
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The latest research in the field of recognition of image characters has led to various developments in the modern technological works for the improvement of recognition rate and precision. This technology is significant in the field of character recognition, business card recognition, document recognition, vehicle license plate recognition etc. for smart city planning, thus its effectiveness should be improved. In order to improve the accuracy of image text recognition effectively, this article uses canny algorithm to process edge detection of text, and k-means algorithm for cluster pixel recognition. This unique combination combined with maximally stable extremal region and optimization of stroke width for image text yields better results in terms of recognition rate, recall, precision, F-score and accuracy. The results show that the correct recognition rate is 88.3% and 72.4% respectively with an accuracy value of 90.5% for the proposed method. This algorithm has high image text recognition rate, can recognize images taken in complex environment, and has good noise removal function. It is significantly an optimal algorithm for image text recognition.
Internet technology advancement has led to an exponential surge in text data. Among the pressing data types today, natural language data stands out. Leveraging natural language processing (NLP) technology, computers c...
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This paper aims to study the relationship among weathering, color, species and ornamentation of glass relics by means of data preprocessing and statistical analysis. At the same time, the logistic regression model was...
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The research of image recognition method based on k-means algorithm for digital motor equipment rapid inspection has important background and research significance. It represents a major advance in the field of device...
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Animation scene design and production is an important part of the animation production process, which involves the layout and environmental design of the animation scene, and has a significant impact on the atmosphere...
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The report provides an overview of the dataset and the models and algorithms applied in the project. Initially, we present a comprehensive review of the RFM model and clustering algorithms. Utilizing the online transa...
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In recent years, traditional urban and rural planning analysis models have been continuously improved to deal with complex problems. Since the traditional model still has defects, the design and application of urban a...
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TC11 impeller blades are typical complex curved surface components. Due to the complex machining load variations, these types of components have always been difficult to effectively solve issues such as significant ma...
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TC11 impeller blades are typical complex curved surface components. Due to the complex machining load variations, these types of components have always been difficult to effectively solve issues such as significant machining deformation and large machining errors. This article characterizes complex surface features based on Gaussian curvature and mean curvature. Different machining methods are employed for different regions of the TC11 material after partitioning, and a comparative experiment is conducted between traditional methods and surface slicing methods for machining. Different machining methods are applied to process the different regions of TC11 material after surface partitioning, and a comparative experiment is conducted between traditional methods and surface slicing methods for machining.
Accurate assessing leaf nitrogen content (LNC) is crucial for actual production and fertilizer management. In this research, a portable device was designed to rapidly and non-destructively evaluate LNC with precision....
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Accurate assessing leaf nitrogen content (LNC) is crucial for actual production and fertilizer management. In this research, a portable device was designed to rapidly and non-destructively evaluate LNC with precision. Using hydroponically grown eggplants exposed to different nitrogen content nutrient solutions as experimental samples, we conducted various measurements, including chlorophyll fluorescence (ChlF) induction curves, hyper- spectral images, and LNC values. Correlations between LNC and ChlF parameters were calculated, and the parameter qN obtained the highest correlation with LNC. False color images of qN were segmented using the kmeansalgorithm to obtain three regions. The spectral data and the measured LNC of the corresponding region in the leaf were matched, and a LNC prediction model was developed using the partial least square regression (PLSR) algorithm with the processed spectral data as input and the measured LNC as output. The results showed that the model using standard normal variate-iteratively retains informative variables- successive projections algorithm (SNV-IRIV-SPA-PLSR) yielded the best performance, with a correlation coefficient of prediction (R2) 2 ) of 0.9332, a root mean square error (RMSE) of 2.6890 mg/g, a residual prediction deviation (RPD) of 3.97 and a ratio of performance to interquartile distance (RPIQ) of 7.28. Based on the selected wavelengths from the SNVIRIV-SPA-PLSR-VIP model, six narrow-band light emitting diodes (LEDs) were chosen as the light source for the designed device. Inexpensive modules were employed to assemble the device, and accuracy tests were conducted. The PLSR algorithm was employed to develop the device's LNC evaluation model with the reflectance of the leaf under 6 LEDs as input (resulting in R2, 2 , RMSE, RPD, and RPIQ values of 0.8075 6.6242 mg/g, 2.30 and 4.26, respectively). The model was then embedded in the core processor. To validate the device's performance, an independent set was used, resulti
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