%0 Conference Proceedings %T DocInfer: Document-level Natural Language Inference using Optimal Evidence Selection %A Mathur, Puneet %A Kunapuli, Gautam %A Bhat, Riyaz %A Shrivastava, Manish %A Manocha, Dinesh %A Singh, Maneesh %Y Goldberg, Yoav %Y Kozareva, Zornitsa %Y Zhang, Yue %S Proceedings …
عرض المزيدTo investigate the effectiveness and optimal ratio of waste incineration byproducts as calcium sources for alkali-activated coal gangue geopolymers, this study first examined the effect of fly ash and bottom ash content on the strength of CGFA/BA geopolymers by using a liquid‒solid ratio of 0.5 and a NaOH/Na 2 SiO 3 ratio of 50:50, …
عرض المزيدCoal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value. In this study, the formation mechanism and influencing factors of coal-gangue-based silicon fertilizer …
عرض المزيدThe over-exploitation of resources caused by the increasing coal demand has resulted in a sharp increase in solid waste emissions mainly gangue, which has made the burden on the environment, economy, resources, and society of our country heavier. In order to achieve a balance between energy consumption and solid waste emission in the …
عرض المزيدTracking foreign objects in coal of belt conveyor gangue selection robot. The utilization of machine vision technology for detecting and tracking extraneous matter, such as coal gangue and anchor rods, on the belt conveyor is of utmost significance. ... Optimal camera focal length detection method for GPS-supported bundle adjustment in UAV ...
عرض المزيدRef. 15 established an approximately optimal feature subset through feature selection to represent ... C. Radiation characteristics of natural gamma-ray from coal …
عرض المزيدColorado hosted its third duel of the 2024 Natural Selection Tour when Salomon team-mates Nils Mindnich and Victor Daviet went board-to-board in Durango, Colorado. The spot was naturally enhanced ...
عرض المزيدAboutTranscript. Natural selection is a mechanism of evolution and explains how species adapt to their environment over time through variations in traits. Examples include the peppered …
عرض المزيدAnother point to note is that large amounts of extracted coal gangue accumulation causes severe damage to ecological environments. Heaps of gangue cause soil erosion, occupy land resources, and pollute water resources and soil resources (as shown in Fig. 4).The waste gangue generated by mining is difficult to handle, is widely …
عرض المزيدThe ratio of gangue slurry is coal gangue to mine water = 7:3, and the mass fraction of gangue slurry is 70%. The grouting pump used in this experiment is a plunger pump, with a maximum ...
عرض المزيدPut the detector in the chamber, with the detection face upward and the bottom pad 20 cm above the ground. During the test, first count the background under diferent threshold values (0.08–1 V ...
عرض المزيدTo address these issues, this study proposes an improved method for detecting gangue and foreign matter in coal, utilizing a gangue selection robot with an enhanced YOLOv7 network model. The proposed approach entails the collection of coal, gangue, and foreign matter images using an industrial camera, which are then utilized to …
عرض المزيدFirstly, the multispectral imaging technology is used to identify and locate coal gangue. Three optimal combination bands are selected from 25 bands for coal gangue detection research by the OIF theory, which can effectively reduce the redundant multispectral information. Second, a fast detection model is designed.
عرض المزيدAiming at the problems of long detection time and low detection accuracy in the existing coal gangue recognition, this paper proposes a method to collect the multispectral images of coal gangue ...
عرض المزيدManual gangue selection is a backward method with excessive labor intensity and low production efficiency. ... and carries out the fitting calculation of the …
عرض المزيدA Bayesian optimal convolutional neural network approach for classification of coal and gangue with multispectral imaging ... Wet selection of gangue mainly …
عرض المزيدThe most common gangue minerals have been selected in Table 133.1, identifying them with the same symbols (abbreviations) as in Annex 1.3 (Gangue). As Table 133.1 shows, most of the gangue species are classified in only two of the Berzelius classes, namely (in approximate order of decreasing abundance and noting the main families …
عرض المزيد& The grinder base mounted on the floor is considered rigid & m 1 is the mass of the grinder head & C 1 is the damping coefficient of the air cylinder for the contact force compensation Fig. 3 Belt grinder and its CAD model. a Belt grinder. b CAD model of the belt grinder Fig.2 Path generation and system kinematics. a CAD model of a
عرض المزيدCemented backfill mining is a green mining method that enhances the coal mining rate and the safety of mined-out regions. To transport the cemented gangue …
عرض المزيدIn addition, the composition of coal gangue is closely associated with coal mining process. At present, the comprehensive utilization of coal gangue is mainly selected according to the carbon content and calorific value. Coal gangue with a high carbon content (>20%) is commonly used for power generation and heating.
عرض المزيدgangue content of 0− are collected and the TFDFs are extracted. Third, the MS-TFDF-F-based coal gangue recognition model is established. Then, the …
عرض المزيدBy comparing the composition of coal gangue sand with natural sand, ... Combined with the results of two orthogonal test designs, it is concluded that the optimal mix ratio of high-volume coal gangue concrete is 90% coal gangue, 60% coal gangue sand, and 0.40 water-binder ratio. Large, natural crushed stone should not use crushed …
عرض المزيدTo address these issues, this study proposes an improved method for detecting gangue and foreign matter in coal, utilizing a gangue selection robot with an enhanced YOLOv7 network model.
عرض المزيدConsidering 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 …
عرض المزيدGangue sand with a particle size of 0.6 - 0.3 mm. DE. Differential evolution algorithm. E. Gangue sand with a particle size of 0.3 - 0.15 mm. F. Gangue sand with a …
عرض المزيدAccurate identification of coal and gangue is very important for realizing efficient separation of coal and gangue and clean utilization of coal. Therefore, a method for identifying coal and gangue by using multispectral spectral information and a convolutional neural network (CNN) model is proposed. First, 200 pieces of coal and 200 pieces of …
عرض المزيدRef. 15 established an approximately optimal feature subset through feature selection to represent ... C. Radiation characteristics of natural gamma-ray from coal and gangue for recognition in top ...
عرض المزيدTests on the basic properties of gangue materials. As shown in Fig. 2, the composition of gangue was analysed by RXD spectroscopy in this experiment.The …
عرض المزيدEvolution - Natural Selection, Adaptation, Genetics: The central argument of Darwin's theory of evolution starts with the existence of hereditary variation. Experience with animal and plant breeding had demonstrated to Darwin that variations can be developed that are "useful to man." So, he reasoned, variations must occur in nature that are favourable or …
عرض المزيدThe experimental results show that the average accuracy of detecting coal-gangue in the test set reaches 98.34 %, and the detection time is about 3.62 s by using the model of YOLOv5.1 to train the RGB image of coal-gangue. This method can not only accurately identify coal-gangue, but also obtain the relative position of coal-gangue, …
عرض المزيدIn the unsupervised feature selection method based on spectral analysis, constructing a similarity matrix is a very important part. In existing methods, the linear low-dimensional projection used in the process of constructing the similarity matrix is too hard, it is very challenging to construct a reliable similarity matrix. To this end, we propose a method to …
عرض المزيدThis chapter discusses the methodology for characterisation and identification of the minerals defined and selected in Chap. 133 as common gangue minerals. As shown in the compilation presented (Table 134.1), the very low reflectance of most gangue minerals (either measured or reckoned by the Fresnel equation) distinguishes them …
عرض المزيدDefinition. Natural selection is a pressure that causes groups of organisms to change over time. Animals inherit their genetics from their parents or ancestors, and the environment is constantly …
عرض المزيدNatural selection acts on an organism's phenotype, or observable features.Phenotype is often largely a product of genotype (the alleles, or gene versions, the organism carries).When a phenotype produced by certain alleles helps organisms survive and reproduce better than their peers, natural selection can increase the frequency of the …
عرض المزيدImproved YOLOv7 Network Model for Gangue Selection Robot for Gangue and Foreign Matter Detection in Coal ... enabling the determination of optimal model weights. ... Li F., …
عرض المزيدResearch on coal gangue recognition based on multi-layer time domain feature processing and recognition features cross-optimal fusion ... Liu et al. [4] proposed a high-precision real-time detection method of low-level natural γ-ray radiation in coal and rock strata and the principle of automatic recognition of coal gangue, which improved the ...
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