BIER是一个基于分段显示路由的骨干网多播技术,将多播分发信息编码到BIER(Bit Index Explicit Replication)头部,免除了中间节点维护多播状态的复杂功能。针对BIER故障保护,提出一种基于P圈的快速重路由方法,设计一种有方向P圈序列的构...BIER是一个基于分段显示路由的骨干网多播技术,将多播分发信息编码到BIER(Bit Index Explicit Replication)头部,免除了中间节点维护多播状态的复杂功能。针对BIER故障保护,提出一种基于P圈的快速重路由方法,设计一种有方向P圈序列的构造算法,并利用广度优先搜索(Breadth First Search,BFS)映射形成备用转发表。以通用的NSF拓扑为例开展可行性验证。展开更多
The features of the techniques of fast reducing roasting （FRR） and conventional magnetic roasting, as well as tremendous demands of iron ores in iron and steel industry of China, were briefly described. The test equ...The features of the techniques of fast reducing roasting （FRR） and conventional magnetic roasting, as well as tremendous demands of iron ores in iron and steel industry of China, were briefly described. The test equipment suitable for FRR of fine-grained materials was introduced. Weakly magnetic materials with grain size of 〈0.30 mm were converted into strongly magnetic materials by FRR for several to dozens of seconds. In a weakly reducing atmosphere and at 740-800 ~C, refractory powder iron material （〈0.30 mm） which is rich in specularite, limonite and Mg-Mn siderite was subjected to FRR for a few seconds to 60 s. Concentrate with iron grade of 55.67%-55.21%, high contents of Mg and Mn in the ore is obtained and the yield of magnetic separation reaches 81.66%-86.57%. The results of X-ray diffraction （XRD） analysis and magnetism detection of the material before and after FRR indicate that weakly magnetic material is mainly converted into strongly magnetic material Fe304 with specific saturation magnetic moment. The efficiency of FRR is consistent with TFe recovery of magnetic separation; meantime, the specific sa^u＇ation magnetic moment increases from 33 to 42 times after FRR. Calculations show that speeds of flash magnetic roasting are obtained from several dozen to two or three hundred times, compared with rotary kiln or shaft furnace. This indicates that it is practicable to use the fast reducing roasting technique to improve the comprehensive utilization of iron ore resources.展开更多
文摘BIER是一个基于分段显示路由的骨干网多播技术,将多播分发信息编码到BIER(Bit Index Explicit Replication)头部,免除了中间节点维护多播状态的复杂功能。针对BIER故障保护,提出一种基于P圈的快速重路由方法,设计一种有方向P圈序列的构造算法,并利用广度优先搜索(Breadth First Search,BFS)映射形成备用转发表。以通用的NSF拓扑为例开展可行性验证。
基金Project(20070497048) supported by China Scholarship Council,Ministry of Education of China
文摘The features of the techniques of fast reducing roasting （FRR） and conventional magnetic roasting, as well as tremendous demands of iron ores in iron and steel industry of China, were briefly described. The test equipment suitable for FRR of fine-grained materials was introduced. Weakly magnetic materials with grain size of 〈0.30 mm were converted into strongly magnetic materials by FRR for several to dozens of seconds. In a weakly reducing atmosphere and at 740-800 ~C, refractory powder iron material （〈0.30 mm） which is rich in specularite, limonite and Mg-Mn siderite was subjected to FRR for a few seconds to 60 s. Concentrate with iron grade of 55.67%-55.21%, high contents of Mg and Mn in the ore is obtained and the yield of magnetic separation reaches 81.66%-86.57%. The results of X-ray diffraction （XRD） analysis and magnetism detection of the material before and after FRR indicate that weakly magnetic material is mainly converted into strongly magnetic material Fe304 with specific saturation magnetic moment. The efficiency of FRR is consistent with TFe recovery of magnetic separation; meantime, the specific sa^u＇ation magnetic moment increases from 33 to 42 times after FRR. Calculations show that speeds of flash magnetic roasting are obtained from several dozen to two or three hundred times, compared with rotary kiln or shaft furnace. This indicates that it is practicable to use the fast reducing roasting technique to improve the comprehensive utilization of iron ore resources.
