The trace elements emission could result in harmness to the environment and human health during coal combustion.The removal of trace elements before coal combustion is an effective method.The transformation and remova...The trace elements emission could result in harmness to the environment and human health during coal combustion.The removal of trace elements before coal combustion is an effective method.The transformation and removal behavior of arsenic in Wujiaping(WJP) coal during sub-critical water treatment was studied in a semi-continuous apparatus.Effects of temperature,pressure,residence time and water flow rate on the arsenic removal were discussed.The occurrence modes of arsenic in WJP raw coal and residuals treated by sub-critical water were also studied by float-sink experiments and sequential chemical extractions.The results show that with the increasing of temperature,pressure,residence time and water flow rate,the arsenic removal in WJP coal also increases;and at the condition of 380 ℃,15 MPa,60 min and water flow rate of 0.58 L/h,the arsenic removal is about 62%.Arsenic in WJP coal mainly is associated with sulfates & mono sulfides,disulfide & some organic matters and "insoluble forms".Sub-critical water treatment can decrease all these arsenic forms in coal and transfer them into the volatile form.展开更多
在网络化控制系统(Networked Control Systems,简记为NCSs)中,由于网络的介入使控制系统的规模和复杂性显著增加,且产生了各种新问题,为了使控制更加容易,需要设计合理的估计策略。主要从控制和通信2个角度出发,集中考虑了在量化影响、...在网络化控制系统(Networked Control Systems,简记为NCSs)中,由于网络的介入使控制系统的规模和复杂性显著增加,且产生了各种新问题,为了使控制更加容易,需要设计合理的估计策略。主要从控制和通信2个角度出发,集中考虑了在量化影响、时延与丢包、不确定性等通信受限因素下状态估计策略的研究与进展。一直以来,状态估计都是诸如过程监控、故障诊断等控制领域中不可缺少的重要部分,当前已成为网络化控制系统研究的热点和难点,为抵消网络环境不确定性对闭环系统性能的影响,设计最优的状态估计策略必将成为不可缺少的因素之一。展开更多
文摘The trace elements emission could result in harmness to the environment and human health during coal combustion.The removal of trace elements before coal combustion is an effective method.The transformation and removal behavior of arsenic in Wujiaping(WJP) coal during sub-critical water treatment was studied in a semi-continuous apparatus.Effects of temperature,pressure,residence time and water flow rate on the arsenic removal were discussed.The occurrence modes of arsenic in WJP raw coal and residuals treated by sub-critical water were also studied by float-sink experiments and sequential chemical extractions.The results show that with the increasing of temperature,pressure,residence time and water flow rate,the arsenic removal in WJP coal also increases;and at the condition of 380 ℃,15 MPa,60 min and water flow rate of 0.58 L/h,the arsenic removal is about 62%.Arsenic in WJP coal mainly is associated with sulfates & mono sulfides,disulfide & some organic matters and "insoluble forms".Sub-critical water treatment can decrease all these arsenic forms in coal and transfer them into the volatile form.
文摘在网络化控制系统(Networked Control Systems,简记为NCSs)中,由于网络的介入使控制系统的规模和复杂性显著增加,且产生了各种新问题,为了使控制更加容易,需要设计合理的估计策略。主要从控制和通信2个角度出发,集中考虑了在量化影响、时延与丢包、不确定性等通信受限因素下状态估计策略的研究与进展。一直以来,状态估计都是诸如过程监控、故障诊断等控制领域中不可缺少的重要部分,当前已成为网络化控制系统研究的热点和难点,为抵消网络环境不确定性对闭环系统性能的影响,设计最优的状态估计策略必将成为不可缺少的因素之一。
