Taille écrasée, Taille trop courte et engoncée. Il signifie encore figurément Perdre quelqu'un, détruire entièrement ses moyens de fortune, de considération, et plus généralement Détruire, anéantir, réduire à rien. La …
Machine vision methods based on visible light are widely used in the coal preparation field. Zhang et al. proposed an image analysis-based method for ash content prediction [7] and density fraction prediction [8] of coarse coal. ... When the gangue density is higher than 1.8 g/cm 3, ME and RA are set to 0.05 and 50%, respectively, thereby ...
In this paper, the ensemble-learning algorithm XGBoost is combined with spectral imaging technology to realize the rapid and accurate identification of coal and coal gangue, which is of great significance to …
Least squares vector machine has a strong ability to classify, so the use of least squares vector machine to achieve coal gangue identification, and build coal …
To improve the accuracy of coal gangue identification in the coal mining process, a coal gangue identification method based on histogram of oriented gradient (HOG) combined with local binary ...
Computer-vision-based separation methods for coal gangue face challenges due to the harsh environmental conditions in the mines, leading to the reduction of separation accuracy. So, rather than purely depending on the image features to distinguish the coal gangue, it is meaningful to utilize fixed coal characteristics like density. This …
Intelligence is the inevitable direction of mining development in the future (Li, 2017; Liu, 2017; Yu et al., 2019).Statistical analysis of the main automatic and intelligent working face at home and abroad shows that the technology of automatic recognition of coal and gangue is still the technical bottleneck of the development of intelligent top coal …
Maintenance et réparation d'un Tour parallèle f38 Chapitre II Généralités sur les machines-outils et l'usinage Avec la machine-outil, le secteur de l'industrie gagne en efficacité, et les entreprises sont moins exposées aux difficultés liées aux …
The coal gangue picking robot is based on the machine vision system, which is an integrated technology using computer image processing technology and analysis …
2. The Basic Properties of Coal Gangue. 2.1. Technical Properties of Coal Gangue Aggregate. In this study, coal gangue was produced by Shanxi Zezhou Coal Plant, and it …
This paper proposes a modified YOLOv4 model, named GYOLO, for coal gangue recognition with the aim of reducing model parameters, improving calculation speed, and reducing equipment requirements. To achieve this, the paper optimizes the feature extraction network structure by using linear operation instead of traditional …
Large–scale underground coal mining is bound to cause serious surface subsidence problems. However, conventional filling and mining methods have problems such as high cost and process difficulty. In order to achieve the purpose of high efficiency and low cost, this paper proposes using the technology of CGSG. To achieve the …
Experimental results indicate that the method proposed in this article can be used to recognize coal and gangue more effectively (at a rate up to 95.12%), compared to the conventional image processing recognition method. ABSTRACT This article proposes a method that can be used to improve the differentiation of coal and gangue via image …
Traditional coal-gangue recognition methods usually do not consider the impact of equipment noise, which severely limits its adaptability and recognition accuracy. This paper mainly studies the ...
Gangue-cemented paste backfill is one kind of paste backfill that is composed of cement, fly ash, and gangue, which is widely used in mining operation for controlling the strata movement and ...
In response to the multiscale shape of coal and gangue in actual production conditions, existing coal separation methods are inefficient in recognizing coal and gangue, causing environmental pollution and other problems. Combining image data preprocessing and deep learning techniques, this paper presents an improved EfficientNetV2 network …
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Sorting. Multi-Arm Global Cooperative Coal Gangue Sorting Method Based on Improved Hungarian Algorithm. 22 (20):7987. 10.3390/s22207987. CC BY 4.0. Show all 6 authors. Download full-text PDF ...
International Journal of Mineral Processing, 10 (1983) 45--60 45 Elsevier Scientific Publishing Company, Amsterdam -- Printed in The Netherlands MIXING AND GANGUE DISPERSION IN FLOTATION MACHINE PULPS C.C. HARRIS, N. ARBITER and M.J. MUSA Henry Krumb School of Mines, Columbia University, New York, NY 10027 …
In the process of coal mining, the separation of coal and gangue is a very important step. Traditional coal preparation methods include manual coal preparation, heavy medium coal preparation, ray projection coal preparation, etc. these methods can not separate coal and gangue under the condition of safety and speed at the same time. Therefore, to improve …
A Coal Gangue Identification Method Based on HOG Combined with LBP Features and Improved Support Vector Machine. Symmetry 2023, 15, ... a machine vision platform for coal gangue
gangue ɡɑ̃ɡ féminin. (Minéralogie) Substance pierreuse ou autre qui enveloppe les minéraux dans le sein de la terre. Pour fondre les matières étrangères du minerai, on ajoute en outre un fondant qui est destiné à former avec la gangue terreuse des silicates fusibles ou laitiers. La nature du fondant dépend de celle de la gangue ...
Coal gangue sorting is a necessary process in coal mine production, and removing gangue is the basis for the coal production of clean energy; it is also an important approach to reduce the cost of ...
Fig. 1 compares the surface state differences of coal and gangue in various situations based on the proposed model. In the ideal laboratory environment, the light intensity is high, the coal and gangue image acquisition process is simple, and the camera receives more light signals, so it is easy to distinguish coal and gangue; however, in the …
Waste discharge and surface damage are the unavoidable consequences of coal mining. However, filling waste into goaf can help reuse waste materials and protect the surface environment. In this paper, it is proposed to fill coal mine goaf with gangue-based cemented backfill material (GCBM), while the rheological and mechanical performances …
Considering that Huainan is an important coal producing area. the coal-gangue and coal blocks used in the experiment were obtained from Huainan mining area [11], and 300 coal and gangues with similar sizes were selected for spectral image acquisition.In order to improve the accuracy of detection, not only the multispectral image …
In coal production, the raw coal contains a large amount of gangue, which affects the quality of coal and pollutes the environment. Separating coal and gangue can improve coal quality, save energy, and reduce consumption and make rational use of resources. The separated gangue can also be reused. Robots with computer vision …
Therefore, the extraction stability of coal and gangue with nonlinear classifier will be higher. At the same time, many isolated samples and noise points often appear in the extraction of coal and gangue. Fuzzy support vector machine is an important method to deal with nonlinear indivisible problems. It changes the inequality constraint of support
The experimental results show that grey wolf algorithm to optimize support vector machine has a good effect on classification of coal gangue images, which proves the feasibility and accuracy of the proposed method. Identification of coal and gangue is one of the important problems in the coal industry. To improve the accuracy of coal gangue …
Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally …
Coal gangues are industrial wastes obtained during coal mining and processing [1].In 2018, the global coal production reached 7.85 billion tons, with approximately 117–157 million tons of coal gangue [2].In particular, approximately 5 billion tons of coal gangue has currently been deposited in China, resulting in severe …
The identification of coal gangue is of great significance for its intelligent separation. To overcome the interference of visible light, we propose coal gangue recognition based on multispectral imaging and Extreme Gradient Boosting (XGBoost). The data acquisition system is built in the laboratory, and 280 groups of spectral data of coal …
Z. Ding et al.: Real-Time Multilevel Fusion Recognition System for Coal and Gangue Based on Near-Infrared Sensing TABLE 1. Performance comparison of different separation …
It can be seen from Table 7 that the coal-gangue detection model based on traditional machine learning is faster in detection speed but lower in accuracy, while the coal-gangue detection method based on deep learning has higher recognition accuracy but lower recognition speed, which cannot meet the real-time and accuracy requirements of …
1. Introduction. Gangue minerals accounts for between 15% and 20% of raw coal in China (Qian et al., 2007).Indeed, as coal production has increased, so has gangue generation; by the end of 2009, the total amount of gangue produced added up to 5.0 × 10 9 t, encompassing 40% of the total Chinese solid waste (Miao and Qian, 2009).The …
