Fire is one of the most common accidents in daily life. In the process of fire accident prevention, monitoring and management, attention should be paid not only to the timeliness of automatic fire alarm equipment, but...Fire is one of the most common accidents in daily life. In the process of fire accident prevention, monitoring and management, attention should be paid not only to the timeliness of automatic fire alarm equipment, but also to the danger of fire caused by building power distribution facilities. Therefore, in the process of design and construction of building electrical systems, We should not only pay attention to the design and installation of the automatic fire alarm system, but also pay attention to the fire protection power distribution system, so that the building electrical system can give full play to its functions, improve the utilization rate of building electrical facilities, and enable the building electrical system to play a good role in the process of fire accident prevention and alarm. This paper will focus on the topic of fire protection power distribution system design and automatic fire alarm system design in the building electrical system.展开更多
Recent years, underground mining method is becoming popular because of its potentially high productivity and efficiency. In this method, a mining machinery; load haul dump(LHD), is used as both an excavator and a tran...Recent years, underground mining method is becoming popular because of its potentially high productivity and efficiency. In this method, a mining machinery; load haul dump(LHD), is used as both an excavator and a transporter of ore. This paper proposes a distributed system that realizes the excavation and transport functions with separated vehicles, an excavator and a transporter. In addition, this research proposes a mining map and configurations suitable for the proposed distributed system. To evaluate the productivity of the proposed system, a simulation environment has been developed. Analysis using the simulator reveals what performance factors of the excavator and the transporter have large impacts on the productivity. Simulation results also demonstrate the difference of potential between LHD system and the distributed system that can be explained based on their functions allocation.展开更多
Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,China.Its accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conduct...Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,China.Its accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conducting 500 MeV linac,and three transport lines.As the beginning of HEPS,a stable linac is quite important,which needs a qualified waveguide distribution system to transmit microwave power from klystrons to accelerating structures.Methods Installation and high-power conditioning of the HEPS linac were performed from February to September 2022.The assembly and conditioning of the waveguide distribution system were completed in April and July,respectively.The design of the waveguide distribution system began in 2018 and was finalized at the end of 2020 after multiple iterations.Results Owing to careful design,fabrication,and assembly preparation,the assembly and conditioning of the system proceeded smoothly and considerable time was saved.Conclusion The entire process from the design to the ultimate realization of the system is introduced in detail in this paper.Satisfactory measurement results were obtained for some waveguide components.展开更多
文摘Fire is one of the most common accidents in daily life. In the process of fire accident prevention, monitoring and management, attention should be paid not only to the timeliness of automatic fire alarm equipment, but also to the danger of fire caused by building power distribution facilities. Therefore, in the process of design and construction of building electrical systems, We should not only pay attention to the design and installation of the automatic fire alarm system, but also pay attention to the fire protection power distribution system, so that the building electrical system can give full play to its functions, improve the utilization rate of building electrical facilities, and enable the building electrical system to play a good role in the process of fire accident prevention and alarm. This paper will focus on the topic of fire protection power distribution system design and automatic fire alarm system design in the building electrical system.
文摘Recent years, underground mining method is becoming popular because of its potentially high productivity and efficiency. In this method, a mining machinery; load haul dump(LHD), is used as both an excavator and a transporter of ore. This paper proposes a distributed system that realizes the excavation and transport functions with separated vehicles, an excavator and a transporter. In addition, this research proposes a mining map and configurations suitable for the proposed distributed system. To evaluate the productivity of the proposed system, a simulation environment has been developed. Analysis using the simulator reveals what performance factors of the excavator and the transporter have large impacts on the productivity. Simulation results also demonstrate the difference of potential between LHD system and the distributed system that can be explained based on their functions allocation.
基金Funded by Youth Innovation Promotion Association CAS(2020015)and the HEPS project.
文摘Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,China.Its accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conducting 500 MeV linac,and three transport lines.As the beginning of HEPS,a stable linac is quite important,which needs a qualified waveguide distribution system to transmit microwave power from klystrons to accelerating structures.Methods Installation and high-power conditioning of the HEPS linac were performed from February to September 2022.The assembly and conditioning of the waveguide distribution system were completed in April and July,respectively.The design of the waveguide distribution system began in 2018 and was finalized at the end of 2020 after multiple iterations.Results Owing to careful design,fabrication,and assembly preparation,the assembly and conditioning of the system proceeded smoothly and considerable time was saved.Conclusion The entire process from the design to the ultimate realization of the system is introduced in detail in this paper.Satisfactory measurement results were obtained for some waveguide components.
