The increasing demand for industrial automation and intelligence has put forward higher requirements for the reliability of industrial wireless communication technology.As an international standard based on 802.11,Wir...The increasing demand for industrial automation and intelligence has put forward higher requirements for the reliability of industrial wireless communication technology.As an international standard based on 802.11,Wireless networks for Industrial Automation-Factory Automation(WIA-FA)greatly improves the reliability in factory automation scenarios by Time Division Multiple Access(TDMA).However,in ultra-dense WIA-FA networks with mobile users,the basic connection management mechanism is inefficient.Most of the handover and resource management algorithms are all based on frequency division multiplexing,not suitable for the TDMA in the WIA-FA network.Therefore,we propose Load-aware Connection Management(LACM)algorithm to adjust the linkage and balance the load of access devices to avoid blocking and improve the reliability of the system.And then we simulate the algorithm to find the optimal settings of the parameters.After comparing with other existing algorithms,the result of the simulation proves that LACM is more efficient in reliability and maintains high reliability of more than 99.8%even in the ultra-dense moving scenario with 1500 field devices.Besides,this algorithm ensures that only a few signaling exchanges are required to ensure load bal-ancing,which is no more than 5 times,and less than half of the best state-of-the-art algorithm.展开更多
为明确不同雪茄品种生长发育对光强的响应差异,在室内模拟条件下,以雪茄品种BES NO H382(简称H382)和古引4号为材料,设置高光强[T200,光照强度为200±12μmol/(m^(2)·s)]和低光强[T100,光照强度为100±12μmol/(m^(2)·...为明确不同雪茄品种生长发育对光强的响应差异,在室内模拟条件下,以雪茄品种BES NO H382(简称H382)和古引4号为材料,设置高光强[T200,光照强度为200±12μmol/(m^(2)·s)]和低光强[T100,光照强度为100±12μmol/(m^(2)·s)]两个光强处理,分析了H382和古引4号在叶片形态、生物量、光合特性等方面对光强的响应差异。结果表明,与高光强处理相比,低光强处理下,H382和古引4号叶长分别增加19.8%、8.6%,叶宽分别增加18.1%、9.3%,叶面积分别增加42.1%、15.6%,H382叶片大小对光强变化的响应更敏感。同时,低光强处理下,H382和古引4号的生物量分别降低20.8%、41.8%,叶脉密度分别降低12.4%、9.4%,叶片厚度分别降低15.7%、19.7%,古引4号的生物量和叶片厚度对光强变化的响应更敏感。低光强处理下H382的表观量子效率升高34.4%,最大净光合速率和光补偿点分别降低21.9%、38.0%,而古引4号无显著变化。综上,H382和古引4号均对光强变化有一定的响应,可望通过遮荫等栽培措施调控烟叶生长。展开更多
基金supported by NSFC project(grant No.61971359)Chongqing Municipal Key Laboratory of Institutions of Higher Education(grant No.cquptmct-202104)+1 种基金Fundamental Research Funds for the Central Universities,Sichuan Science and Technology Project(grant no.2021YFQ0053)State Key Laboratory of Rail Transit Engineering Informatization(FSDI).
文摘The increasing demand for industrial automation and intelligence has put forward higher requirements for the reliability of industrial wireless communication technology.As an international standard based on 802.11,Wireless networks for Industrial Automation-Factory Automation(WIA-FA)greatly improves the reliability in factory automation scenarios by Time Division Multiple Access(TDMA).However,in ultra-dense WIA-FA networks with mobile users,the basic connection management mechanism is inefficient.Most of the handover and resource management algorithms are all based on frequency division multiplexing,not suitable for the TDMA in the WIA-FA network.Therefore,we propose Load-aware Connection Management(LACM)algorithm to adjust the linkage and balance the load of access devices to avoid blocking and improve the reliability of the system.And then we simulate the algorithm to find the optimal settings of the parameters.After comparing with other existing algorithms,the result of the simulation proves that LACM is more efficient in reliability and maintains high reliability of more than 99.8%even in the ultra-dense moving scenario with 1500 field devices.Besides,this algorithm ensures that only a few signaling exchanges are required to ensure load bal-ancing,which is no more than 5 times,and less than half of the best state-of-the-art algorithm.
文摘为明确不同雪茄品种生长发育对光强的响应差异,在室内模拟条件下,以雪茄品种BES NO H382(简称H382)和古引4号为材料,设置高光强[T200,光照强度为200±12μmol/(m^(2)·s)]和低光强[T100,光照强度为100±12μmol/(m^(2)·s)]两个光强处理,分析了H382和古引4号在叶片形态、生物量、光合特性等方面对光强的响应差异。结果表明,与高光强处理相比,低光强处理下,H382和古引4号叶长分别增加19.8%、8.6%,叶宽分别增加18.1%、9.3%,叶面积分别增加42.1%、15.6%,H382叶片大小对光强变化的响应更敏感。同时,低光强处理下,H382和古引4号的生物量分别降低20.8%、41.8%,叶脉密度分别降低12.4%、9.4%,叶片厚度分别降低15.7%、19.7%,古引4号的生物量和叶片厚度对光强变化的响应更敏感。低光强处理下H382的表观量子效率升高34.4%,最大净光合速率和光补偿点分别降低21.9%、38.0%,而古引4号无显著变化。综上,H382和古引4号均对光强变化有一定的响应,可望通过遮荫等栽培措施调控烟叶生长。
