%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 …
To 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, …
The 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 …
Another 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 …
The 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 ...
Put 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 ...
Tests 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 …
Research 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 ...
Colorado 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 ...
In 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.
Accurate 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 …
& 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
In 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 …
Balanced Packing: Packing your pre-roll with the right density prevents air pockets and promotes consistent airflow. Avoiding overly tight or loose packing ensures an optimal burn rate. Enhanced Smoke: Proper density encourages the controlled release of flavors and aromas, resulting in a richer, more enjoyable smoke.
Ref. 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 ...
AboutTranscript. 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 …
To 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 …
Tracking 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 ...
This 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 …
gangue content of 0− are collected and the TFDFs are extracted. Third, the MS-TFDF-F-based coal gangue recognition model is established. Then, the …
Cemented 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 …
To 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.
Natural selection is one of the mechanisms that drives evolution. To be an active characteristic or trait causing natural selection to take place, the trait has to have the following features: Heritability. A trait can only influence evolution through natural selection if it is passed on from parents to descendants. Functionality.
intensity from coal seams, so natural γ X-ray technology has wide applicability in coal gangue identification. 2.4 Radiation characteristics of coal and rock strata in ty pical thick coal seam ...
Manual gangue selection is a backward method with excessive labor intensity and low production efficiency. ... and carries out the fitting calculation of the …
The 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, …
Coal 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 …
Improved YOLOv7 Network Model for Gangue Selection Robot for Gangue and Foreign Matter Detection in Coal ... enabling the determination of optimal model weights. ... Li F., Yang X., Ma Q. Spatial Effect Analysis of Coal and Gangue Recognition Detector Based on Natural Gamma Ray Method. Nat. Resour. Res. 2022; 31:953–969. doi: 10.1007/s11053 ...
The system simulation shows that optimal selection of key control parameters of the grinder and proper selection of robot control strategies can efficiently suppress chatter in the grinding process. Furthermore, having the ability to predict material removal rate, the comprehensive simulation platform is also demonstrated to be a strong …
Ref. 15 established an approximately optimal feature subset through feature selection to represent ... C. Radiation characteristics of natural gamma-ray from coal …
gangue content of 0− are collected and the TFDFs are extracted. Third, the MS-TFDF-F-based coal gangue recognition model is established. Then, the recognition effectof the two TFDF-F sample sets was compared, and the results show that the time− frequency domain feature selection fusion method (TFDFS-FM) has higher accuracy.
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 …
Coal gangue, produced during coal mining and processing [1, 2], is one of the most extensively produced solid wastes in China [1, 3], accounting for approximately 10%‒20% of raw coal production [].The accumulation of coal gangue causes serious environmental, social, and economic problems in the coal mining area [].Heavy metals …
When the gangue mixing rate is low, the coal sample temperature plays a controlling role in the change of infrared image characteristics of coal gangue mixture; When the mixed gangue rate is less ...
The inability to identify accurately coal and gangue has been the bottleneck restricting the intellectualization of top coal caving. The difficulty of coal and gangue recognition lies on the fact that with the advance of working face, the change of coal caving space requires the relative position of the detector and coal–gangue to be synchronized. …