社区机会网络中节点的移动具有一定的相关性且不同的节点往往具有不同的移动特点,当前机会网络中主流的多拷贝路由算法并未充分考虑到这些特点,将该算法直接应用于这类网络会导致资源消耗较高、传输成功率低等问题。针对这些问题,提出...社区机会网络中节点的移动具有一定的相关性且不同的节点往往具有不同的移动特点,当前机会网络中主流的多拷贝路由算法并未充分考虑到这些特点,将该算法直接应用于这类网络会导致资源消耗较高、传输成功率低等问题。针对这些问题,提出一种基于社区的低功耗消息路由算法,其能自适应地控制消息拷贝数量,并根据节点与目标社区节点和本地社区节点相遇的历史信息来设置其目标社区和本地社区的活跃度,依靠活跃度较高的节点来完成消息传输。仿真结果表明,在延迟要求比较宽松的社区机会网络中,该算法在消息传输的成功率及占能耗最主要部分的消息转发次数方面明显优于Spray and Focus算法。展开更多
Burnt lime is an important material in steelmaking and its activity degree is a key factor for liquid steel quality. The burnt lime was made by the calcination of limestone in a high pressure electric furnace. The bur...Burnt lime is an important material in steelmaking and its activity degree is a key factor for liquid steel quality. The burnt lime was made by the calcination of limestone in a high pressure electric furnace. The burnt lime mineralogical phases and micro-morphologies were characterized by X-ray diffraction （XRD） and field emission scan- ning electron microscopy （FE-SEM）. The burnt lime activity degree was determined by acid-base titration, the burnt lime pore distribution was measured by mercury intrusion porosimetry （MIP）, and the thermal effect of a mixture of burnt lime and slag was measured by differential scanning calorimetry （DSC）. The results showed that the CaO grain size and pore size of burnt lime made under high pressure were larger than those of burnt lime made under atmos- pheric pressure. The CaO grain size and pore size increased and the laminate phenomenon also occurred clearly under high pressure. The activity degree of burnt lime made under high pressure was greater than that made under atmos- pheric pressure. The maximum activity degree was 437 mL for burnt lime made under a pressure of 0.4 MPa. For the same ratio of CaO to SiOz, the melting temperature, hemisphere temperature and fluidity temperature of slag decreased with increasing burnt lime activity degree. The higher the activity degree the burnt lime had, the better the slag forming occurred. It was advantageous for -2CaO · SiO2 and 3CaO · SiO2 forming at lower temperatures if the burnt lime activity degree was increased.展开更多
文摘社区机会网络中节点的移动具有一定的相关性且不同的节点往往具有不同的移动特点,当前机会网络中主流的多拷贝路由算法并未充分考虑到这些特点,将该算法直接应用于这类网络会导致资源消耗较高、传输成功率低等问题。针对这些问题,提出一种基于社区的低功耗消息路由算法,其能自适应地控制消息拷贝数量,并根据节点与目标社区节点和本地社区节点相遇的历史信息来设置其目标社区和本地社区的活跃度,依靠活跃度较高的节点来完成消息传输。仿真结果表明,在延迟要求比较宽松的社区机会网络中,该算法在消息传输的成功率及占能耗最主要部分的消息转发次数方面明显优于Spray and Focus算法。
基金Sponsored by National Natural Science Foundation of China(51174075,51274084)Natural Science Foundation of Hebei Province of China(E2012209024,E2014209157)
文摘Burnt lime is an important material in steelmaking and its activity degree is a key factor for liquid steel quality. The burnt lime was made by the calcination of limestone in a high pressure electric furnace. The burnt lime mineralogical phases and micro-morphologies were characterized by X-ray diffraction （XRD） and field emission scan- ning electron microscopy （FE-SEM）. The burnt lime activity degree was determined by acid-base titration, the burnt lime pore distribution was measured by mercury intrusion porosimetry （MIP）, and the thermal effect of a mixture of burnt lime and slag was measured by differential scanning calorimetry （DSC）. The results showed that the CaO grain size and pore size of burnt lime made under high pressure were larger than those of burnt lime made under atmos- pheric pressure. The CaO grain size and pore size increased and the laminate phenomenon also occurred clearly under high pressure. The activity degree of burnt lime made under high pressure was greater than that made under atmos- pheric pressure. The maximum activity degree was 437 mL for burnt lime made under a pressure of 0.4 MPa. For the same ratio of CaO to SiOz, the melting temperature, hemisphere temperature and fluidity temperature of slag decreased with increasing burnt lime activity degree. The higher the activity degree the burnt lime had, the better the slag forming occurred. It was advantageous for -2CaO · SiO2 and 3CaO · SiO2 forming at lower temperatures if the burnt lime activity degree was increased.
