In order to solve the problem of metal impurities mixed in the production line of wood pulp nonwoven raw materials,intelligent metal detection and disposal automation equipment is designed.Based on the principle of el...In order to solve the problem of metal impurities mixed in the production line of wood pulp nonwoven raw materials,intelligent metal detection and disposal automation equipment is designed.Based on the principle of electromagnetic induction,the precise positioning of metal coordinates is realized by initial inspection and multi-directional re-inspection.Based on a geometry optimization driving algorithm,the cutting area is determined by locating the center of the circle that covers the maximum area.This approach aims to minimize the cutting area and maximize the use of materials.Additionally,the method strives to preserve as many fabrics at the edges as possible by employing the farthest edge covering circle algorithm.Based on a speed compensation algorithm,the flexible switching of upper and lower rolls is realized to ensure the maximum production efficiency.Compared with the metal detection device in the existing production line,the designed automation equipment has the advantages of higher detection sensitivity,more accurate metal coordinate positioning,smaller cutting material areas and higher production efficiency,which can make the production process more continuous,automated and intelligent.展开更多
Background of the development and achievement on sets equipment technologies for coal mine longwall face in China was reviewed initially. On the theoretical side, a coupling model of hydraulic support and surrounding ...Background of the development and achievement on sets equipment technologies for coal mine longwall face in China was reviewed initially. On the theoretical side, a coupling model of hydraulic support and surrounding rock, support pa- rameters optimization and threedimensional （3D） dynamic design method were presented. On the practical side, this paper out lined some of practical issues and discussed some relative methods and technologies. In thin seam coal longwall mining, how to lower equipment height is the first problem that should be solved. Roof pressure regularity, control of rooffall and collapse, and hydraulic support stability were investigated preferentially in 5-7 m coal seam longwall mining. The application of equip- ment for longwall mining with 5-7 m cutting height in China was concluded. The characteristics of full-mechanized top coal caving for extra thick seam coal were presented. The automation of top-caving hydraulic support and relevant equipment have achieved important breakthrough. At the end of this paper, further development of China＇s coal industry and longwall mining technologies and equipment were prospected in brief. This paper gives readers a comprehensive understanding of China＇s coal mine longwall face equipment technologies. It will give help to other countries on its coal mining development.展开更多
深海微生物在全球碳氮循环中起到重要作用,目前对深海微生物的精细化研究主要以实验室高压模拟培养检测为主,当深海样品采集至实验室培养检测时,温度、压力等环境参数会有一定程度的变化,影响后续的试验与检测。为此,设计了一种用于深...深海微生物在全球碳氮循环中起到重要作用,目前对深海微生物的精细化研究主要以实验室高压模拟培养检测为主,当深海样品采集至实验室培养检测时,温度、压力等环境参数会有一定程度的变化,影响后续的试验与检测。为此,设计了一种用于深海微生物原位自动序列培养的装置(ocean automatic series incubation system,OASIS)。文章围绕OASIS的工作原理、系统组成和试验验证等方面展开论述,重点研究深海液体转移精度问题。OASIS已经通过了水池试验、压力试验、海上试验等各项测试,试验结果表明:该装置能在30MPa高压下正常工作,按照时间顺序自动完成对微生物的培养与生命信息固定,对准确认识深海生态系统的生态效益提供了良好的设备支撑。展开更多
基金National Key Research and Development Program of China(Nos.2022YFB4700600 and 2022YFB4700605)。
文摘In order to solve the problem of metal impurities mixed in the production line of wood pulp nonwoven raw materials,intelligent metal detection and disposal automation equipment is designed.Based on the principle of electromagnetic induction,the precise positioning of metal coordinates is realized by initial inspection and multi-directional re-inspection.Based on a geometry optimization driving algorithm,the cutting area is determined by locating the center of the circle that covers the maximum area.This approach aims to minimize the cutting area and maximize the use of materials.Additionally,the method strives to preserve as many fabrics at the edges as possible by employing the farthest edge covering circle algorithm.Based on a speed compensation algorithm,the flexible switching of upper and lower rolls is realized to ensure the maximum production efficiency.Compared with the metal detection device in the existing production line,the designed automation equipment has the advantages of higher detection sensitivity,more accurate metal coordinate positioning,smaller cutting material areas and higher production efficiency,which can make the production process more continuous,automated and intelligent.
文摘Background of the development and achievement on sets equipment technologies for coal mine longwall face in China was reviewed initially. On the theoretical side, a coupling model of hydraulic support and surrounding rock, support pa- rameters optimization and threedimensional （3D） dynamic design method were presented. On the practical side, this paper out lined some of practical issues and discussed some relative methods and technologies. In thin seam coal longwall mining, how to lower equipment height is the first problem that should be solved. Roof pressure regularity, control of rooffall and collapse, and hydraulic support stability were investigated preferentially in 5-7 m coal seam longwall mining. The application of equip- ment for longwall mining with 5-7 m cutting height in China was concluded. The characteristics of full-mechanized top coal caving for extra thick seam coal were presented. The automation of top-caving hydraulic support and relevant equipment have achieved important breakthrough. At the end of this paper, further development of China＇s coal industry and longwall mining technologies and equipment were prospected in brief. This paper gives readers a comprehensive understanding of China＇s coal mine longwall face equipment technologies. It will give help to other countries on its coal mining development.
文摘深海微生物在全球碳氮循环中起到重要作用,目前对深海微生物的精细化研究主要以实验室高压模拟培养检测为主,当深海样品采集至实验室培养检测时,温度、压力等环境参数会有一定程度的变化,影响后续的试验与检测。为此,设计了一种用于深海微生物原位自动序列培养的装置(ocean automatic series incubation system,OASIS)。文章围绕OASIS的工作原理、系统组成和试验验证等方面展开论述,重点研究深海液体转移精度问题。OASIS已经通过了水池试验、压力试验、海上试验等各项测试,试验结果表明:该装置能在30MPa高压下正常工作,按照时间顺序自动完成对微生物的培养与生命信息固定,对准确认识深海生态系统的生态效益提供了良好的设备支撑。
