12 results on '"Zhang, Dianhua"'
Search Results
2. Flying Gauge Change
- Author
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Zhang Dianhua and Xu Kuangdi
- Published
- 2023
3. Strip Cold Rolling
- Author
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Zhang Dianhua and Xu Kuangdi
- Published
- 2022
4. Optimization of the Schedule for the Whole Process in Hot Strip Manufacturing
- Author
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Yafeng Ji, Ma Jianyang, Jinggou Ding, Zhang Dianhua, Xiaorui Chen, Jie Sun, and Wen Peng
- Subjects
lcsh:TN1-997 ,Production line ,0209 industrial biotechnology ,Schedule ,Computer science ,0211 other engineering and technologies ,Metals and Alloys ,Process (computing) ,02 engineering and technology ,Function (mathematics) ,Energy consumption ,Automotive engineering ,020901 industrial engineering & automation ,differential evolution algorithms ,Heating energy ,multi-objective function ,energy consumption ,hot strip manufacturing ,General Materials Science ,Boundary value problem ,lcsh:Mining engineering. Metallurgy ,Energy (signal processing) ,021102 mining & metallurgy - Abstract
Optimization of the schedule is an effective way to reduce energy consumption in hot strip manufacturing. The heating energy and the rolling energy contribute the vast majority of the energy consumption. In order to reduce the energy consumption for the whole process, an optimization method based on the multi-objective function was applied, and the heating energy and rolling energy were both taken into consideration during the function modeling. Meanwhile, process constraints and equipment limitations were taken as objective function boundary conditions, and the tapping temperature in the furnace exit and thickness of each pass were decision variables. Further, to obtain the optimal solution of the objective function, the differential evolution algorithm was used, finally, the optimal tapping temperature and the thickness were obtained successfully. Meanwhile, the validity of the calculated results was verified by comparing with the actual process in a hot rolling production line in Hebei province, the results indicated that with the proposed method, a more reasonable schedule were obtained, compared with the existing actual schedule of typical specification, the energy consumption can be reduced by about 1.5%.
- Published
- 2020
- Full Text
- View/download PDF
5. Improved Path Planning Algorithm on the Rugged Road
- Author
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Gao Mingke, Chen Yimin, Zhang Dianhua, and Chen Huang
- Subjects
0209 industrial biotechnology ,Mathematical optimization ,General Computer Science ,Trafficability ,Computation ,Elevation ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Terrain ,02 engineering and technology ,Grid ,Fuzzy logic ,020901 industrial engineering & automation ,Control and Systems Engineering ,0202 electrical engineering, electronic engineering, information engineering ,Robot ,020201 artificial intelligence & image processing ,Motion planning ,Algorithm ,Mathematics - Abstract
The path planning problem is an important problem in the research area of robot, games and group animation. This paper shows a 2.5-dimensional terrain grid which can reduce the amount of computation. By applying the fuzzy logic theory, the terrain trafficability of the rugged road can be evaluated based on different gradient, roughness, elevation difference; the trafficability factor can be achieved and applied to the heuristic function. The improved algorithm can solve the symmetry problem of path planning on uneven surfaces, reduce the search space.
- Published
- 2016
6. Gesture Interaction for Coronary Heart Diseases Based on Wavelet Transform and Semi-Continuous Hidden Markov Model in Augmented Reality
- Author
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Chen Huang, Rongrong Lu, Yimin Chen, Zeyu Li, Zhang Dianhua, Siyu Jiang, Jiahui Lu, Shengqing Lv, and Mingke Gao
- Subjects
Computer science ,business.industry ,Speech recognition ,Wavelet transform ,Computer vision ,Augmented reality ,Artificial intelligence ,Electrical and Electronic Engineering ,Hidden Markov model ,business ,Coronary heart disease ,Electronic, Optical and Magnetic Materials ,Gesture - Published
- 2017
7. Coronary Heart Disease Preoperative Gesture Interactive Diagnostic System Based on Augmented Reality
- Author
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Yimin Chen, Chen Huang, Jiahui Lu, Gao Mingke, Quan Liu, Zhang Dianhua, Zou Yibo, Siyu Jiang, and Zeyu Li
- Subjects
020205 medical informatics ,Computer science ,Medicine (miscellaneous) ,Coronary Disease ,Health Informatics ,02 engineering and technology ,Motion (physics) ,Health Information Management ,0202 electrical engineering, electronic engineering, information engineering ,Humans ,Computer vision ,Hidden Markov model ,Modality (human–computer interaction) ,Gestures ,business.industry ,Orientation (computer vision) ,Reproducibility of Results ,Hand ,Gesture recognition ,Trajectory ,020201 artificial intelligence & image processing ,Augmented reality ,Artificial intelligence ,business ,Algorithms ,Information Systems ,Gesture - Abstract
Coronary heart disease preoperative diagnosis plays an important role in the treatment of vascular interventional surgery. Actually, most doctors are used to diagnosing the position of the vascular stenosis and then empirically estimating vascular stenosis by selective coronary angiography images instead of using mouse, keyboard and computer during preoperative diagnosis. The invasive diagnostic modality is short of intuitive and natural interaction and the results are not accurate enough. Aiming at above problems, the coronary heart disease preoperative gesture interactive diagnostic system based on Augmented Reality is proposed. The system uses Leap Motion Controller to capture hand gesture video sequences and extract the features which that are the position and orientation vector of the gesture motion trajectory and the change of the hand shape. The training planet is determined by K-means algorithm and then the effect of gesture training is improved by multi-features and multi-observation sequences for gesture training. The reusability of gesture is improved by establishing the state transition model. The algorithm efficiency is improved by gesture prejudgment which is used by threshold discriminating before recognition. The integrity of the trajectory is preserved and the gesture motion space is extended by employing space rotation transformation of gesture manipulation plane. Ultimately, the gesture recognition based on SRT-HMM is realized. The diagnosis and measurement of the vascular stenosis are intuitively and naturally realized by operating and measuring the coronary artery model with augmented reality and gesture interaction techniques. All of the gesture recognition experiments show the distinguish ability and generalization ability of the algorithm and gesture interaction experiments prove the availability and reliability of the system.
- Published
- 2017
8. Influence Factors of Stirring Speed of Self- Stirring Tubular Reactor Used in Bauxite Digestion Process
- Author
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ZHANG Zimu, ZHAO Qiuyue, ZHANG Dianhua, ZHANG Ting- an, LIU Yan, LYU Guozhi, DOU Zhihe, and ZHANG Changdong
- Published
- 2016
9. Key Intelligent Technology of Steel Strip Production through Process
- Author
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Wen Peng, Li Xu, Jie Sun, Ding Jingguo, and Zhang Dianhua
- Subjects
lcsh:TN1-997 ,0209 industrial biotechnology ,Computer science ,media_common.quotation_subject ,Supply chain ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Process design ,02 engineering and technology ,Dynamic priority scheduling ,steel strip ,020501 mining & metallurgy ,020901 industrial engineering & automation ,Steel mill ,General Materials Science ,Quality (business) ,supply chain optimization ,Process engineering ,lcsh:Mining engineering. Metallurgy ,media_common ,business.industry ,product quality improvement ,Metals and Alloys ,Process (computing) ,through-process optimization ,0205 materials engineering ,intelligent manufacturing ,Intelligent control ,Supply chain optimization ,business - Abstract
Because of the complexity of procedure interface and working conditions, the further improvement of steel strip quality and production efficiency is limited. Realizing the optimization of product quality and production process in multi-process, system-level through intelligent key technology is one of the strategic directions in steel strip production. (1) Collaborative intelligent optimization and dynamic scheduling technology for steel manufacturing supply chain oriented to customized production, reducing the cost of raw material purchase and production operations and improving production efficiency and precision service ability, (2) Online monitoring, diagnosis and optimization technology of product quality. Getting through the process information flow of product, the correlation analysis of process quality parameters, the tracing of quality anomalies, the reverse optimization of process parameters and the optimization of process route will be realized, (3) Multi-process coordination optimization and quality control based on CPS architecture. The precise control technology of process quality parameters will be developed, the structure of multi-process coordination optimization system is established and optimization of key quality parameters in the through process will be realized, and (4) Microstructure and mechanical property optimization and surface quality intelligent control technology in the hot strip rolling process. Intelligent prediction of microstructure and mechanical properties, rapid dynamic design and steel grade merging technology will be formed and green process design technology of oxide scale will be developed.
- Published
- 2018
10. Three-Dimensional Path Planning and Guidance of Leg Vascular Based on Improved Ant Colony Algorithm in Augmented Reality
- Author
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Li Zeyu, Ming-Ke Gao, Chen Yimin, Chen Huang, Quan Liu, and Zhang Dianhua
- Subjects
Time Factors ,Computer science ,Ant colony optimization algorithms ,Vascular access ,Medicine (miscellaneous) ,Optical head-mounted display ,Reproducibility of Results ,Health Informatics ,Radiation Exposure ,Surgical training ,Imaging phantom ,Imaging, Three-Dimensional ,Health Information Management ,Preoperative Period ,Critical Pathways ,Humans ,Augmented reality ,Computer Simulation ,Motion planning ,Electromagnetic tracking ,Vascular Surgical Procedures ,Simulation ,Algorithms ,Vascular Access Devices ,Information Systems - Abstract
Preoperative path planning plays a critical role in vascular access surgery. Vascular access surgery has superior difficulties and requires long training periods as well as precise operation. Yet doctors are on different leves, thus bulky size of blood vessels is usually chosen to undergo surgery and other possible optimal path is not considered. Moreover, patients and surgeons will suffer from X-ray radiation during the surgical procedure. The study proposed an improved ant colony algorithm to plan a vascular optimal three-dimensional path with overall consideration of factors such as catheter diameter, vascular length, diameter as well as the curvature and torsion. To protect the doctor and patient from exposing to X-ray long-term, the paper adopted augmented reality technology to register the reconstructed vascular model and physical model meanwhile, locate catheter by the electromagnetic tracking system and used Head Mounted Display to show the planning path in real time and monitor catheter push procedure. The experiment manifests reasonableness of preoperative path planning and proves the reliability of the algorithm. The augmented reality experiment real time and accurately displays the vascular phantom model, planning path and the catheter trajectory and proves the feasibility of this method. The paper presented a useful and feasible surgical scheme which was based on the improved ant colony algorithm to plan vascular three-dimensional path in augmented reality. The study possessed practical guiding significance in preoperative path planning, intraoperative catheter guiding and surgical training, which provided a theoretical method of path planning for vascular access surgery. It was a safe and reliable path planning approach and possessed practical reference value.
- Published
- 2015
11. A Novel Self-Stirring Tubular Reactor Used in Bauxite Digestion Process
- Author
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Zhang Zimu, Zhao Qiuyue, Zhang Dianhua, Zhang Ting-an, Liu Yan, Lv Guozhi, Dou Zhihe, and Zhang Changdong
- Published
- 2015
12. Study of Path Planning Algorithm Based on Fuzzy Logic
- Author
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Zhang Dianhua, Mingke Gao, Chen Huang, and Chen Yimin
- Subjects
Mathematical optimization ,Trafficability ,Computation ,Robot ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Terrain ,Motion planning ,Grid ,Algorithm ,Fuzzy logic ,Any-angle path planning ,Mathematics - Abstract
The path planning problem is an important problem in the research area of robot, games and group animation. However, the current path planning algorithms don't consider practical problems such as roughness, gradient, and barrier height etc. This paper shows a 2.5- dimensional terrain grid which can reduce the amount of computation. By applying the fuzzy logic theory, the terrain trafficability of the rugged road can be evaluated based on different gradient, roughness, elevation difference; the trafficability factor can be achieved and applied to the heuristic function. The improved algorithm can solve the symmetry problem of path planning on uneven surfaces, reduce the search space, and improve the search speed.
- Published
- 2015
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