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2 2025

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Effect of column segment diameter ratio on flow field and separation performance of the composite column-cone hydrocyclone

Liu Peikun, Xu Xiangxi, Yang Xinghua, Li Anjun, Chen Bo, Liu Gang, Gao Yunzhu

Physicochemical Problems of Mineral Processing

2025

Vol. 61, iss. 1

art. no. 200063

To address the misplacement of fine particles in the underflow caused by structural defects in conventional hydrocyclones, a composite column-cone hydrocyclone (C-C hydrocyclone) was proposed, featuring a cone-column-cone structure. Computational Fluid Dynamics (CFD) techniques were employed to study the diameter ratio and various configurations of C-C hydrocyclone, assessing the impact on separation performance. Results indicated that increasing the column section diameter ratio from 0.5 to 0.7 reduced the cutting size by 22.96 %, enhanced sharpness by 9.87 %, and improved separation efficiency. These findings offer valuable insights for the design and application of C-C hydrocyclones based on specific requirements such as grinding classification and flotation operations.

Optimization of VR Human-computer Game Interaction Based on Improved PIFPAF Algorithm and Binocular Vision

Zhu Hong, Chen Bo

Machine Graphics and Vision

2025

Vol. 34, No. 3

3--30

To make virtual reality human-computer games more accurate and provide users with animmersive gaming experience, the study combines the method of improved part intensity field and partassociation field (PIFPAF) with binocular vision to optimize the interaction of VR human-computergames. The experimental results indicated that the PIFPAF algorithms performed relatively well withnumber of errors and target keypoint correlation of 0.22 and 0.97, respectively. In terms of processingspeed, the algorithm performed faster in both 640×480 and 320×240 resolutions, with 13 fps and 19 fps,respectively. Among the five predefined gestures, the “pointing” gesture was recognized correctly thelargest number of times in 30 test sessions, with 29 successful identifications. In contrast, the “clenchedfist” gesture had the fewest correct recognitions, totaling 26. The success of the suggested approachis confirmed by the experimental findings, which show that the optimized human-computer interactionsystem has high accuracy and processing speed. This study offers a fresh approach to the advancementof human-computer interaction technology and encourages technological integration innovation in therealm of virtual reality human-computer gaming.