The Load Coordinate Control System of CFBB

循环流化床锅炉(CirculatingFluidizedBedBoiler，简称CFBB或CFB锅炉)作为高效、低污染、燃料适应性广、负荷调节性能好的洁净燃煤技术，在全世界受到广泛重视，正在成为燃煤技术的主力军。循环流化床锅炉商业化的迅速发展给它的运行自动化提出了很高的要求。因此在我国大力开发研制循环流化床锅炉的自动控制技术是一项迫在眉睫的战略性任务，尤其是开发适合中国国情的循环流化床热工控制系统。 由于现有的控制系统都是建立在近似线性化模型或是辨识模型的基础上，根据过程的输入输出数据直接建模，过于依赖过程的输入输出数据，模型不具有可解释性。因此，我们希望在本实验室已开发的循环流化床锅炉机理...Circulation Fluidized Bed (CFB) is becoming the main coal combustion technique all over the world for its attractive advantages of high combustion efficiency，Efficient Sulfur Removal, Low NO2 Emission，fuel flexibility and good load-following capability. High demand of automatic control of CFBB is proposed with its fast commercial development. Study of the control strategy for CFBB is getting more ...学位：工学硕士院系专业：化学化工学院化学工程与生物工程系_化学工程学号：20043301

等离子喷涂Al_2O_3-13%TiO_2涂层的海水腐蚀磨损性能

基于等离子喷涂技术构筑了高耐磨、耐蚀的Al_2O_3-13%TiO_2涂层(AT13涂层),利用Rtec磨蚀试验机研究AT13涂层在干摩擦、去离子水和人工海水介质中的摩擦磨损性能,并利用电化学工作站分析了涂层在静态腐蚀和滑动磨损中的开路电位和极化曲线的变化,探讨了AT13涂层的腐蚀磨损机理。结果表明:热喷涂AT13涂层由α-Al_2O_3、γ-Al_2O_3、金红石型TiO_2和Al_2TiO_5相组成,其中富Ti相呈条带状分布于富Al基体中;AT13涂层在海水工况具有较好的润滑性,与干摩擦相比,其摩擦因数减小了0.15,且具有较好的稳定性;在3种工况下,AT13涂层都具有优异的耐磨损性能,海水润滑条件下,AT13涂层具有最小的磨损率,且随载荷的增加而减小;磨损过程加重了海水对涂层的腐蚀,但影响较小

干燥方式对迷迭香脂溶性抗氧化物质 得率及抗氧化活性的影响 Effects of drying methods on yield and antioxidant activity of fat-soluble antioxidant components from Rosmarinus officinalis

通过研究不同生长期对迷迭香脂溶性抗氧化物质（鼠尾草酸、鼠尾草酚和熊果酸）得率的影响筛选出最佳生长期，在此基础上测定不同干燥方式（阴干、烘干（45 ℃）和晾晒）下迷迭香脂溶性抗氧化物质得率，DPPH自由基、ABTS+自由基、羟自由基清除能力和铁还原力，以考察不同干燥方式对迷迭香脂溶性抗氧化物质抗氧化活性的影响。结果表明：迷迭香抗氧化物质积累的最佳生长期为10个月，3种不同干燥方式中烘干处理的迷迭香所提脂溶性抗氧化物质的得率最大，DPPH自由基、ABTS+自由基、羟自由基清除能力和铁还原力均最强，但弱于TBHQ，其清除DPPH自由基、ABTS+自由基、羟自由基的半抑制浓度（IC50）分别为0.034、0.068、0.067 mg/mL。因此，采用生长期10个月、烘干处理的迷迭香所提脂溶性抗氧化物质具有较强的抗氧化活性，能较好地保留迷迭香脂溶性抗氧化物质，适用于工业生产。The optimal growth period was selected by studying the effect of different growth periods on the yield of fat-soluble antioxidant components (carnosic acid, carnosol and ursolic acid) in Rosmarinus officinalis，then the yield of Rosmarinus officinalis fat-soluble antioxidant components, the scavenging capacity of DPPH radical, ABTS+ radical, hydroxyl radical and iron reducing power were determined under different drying methods (shade drying, sun drying and hot air drying at 45 ℃) to investigate the effect of different drying methods on the antioxidant activity of Rosmarinus officinalis fat-soluble antioxidant components.The results showed that ten months was the optimal growth period for the accumulation of fat-soluble antioxidant components in Rosmarinus officinalis.Rosmarinus officinalis treated with hot air drying had the highest yield of fat-soluble antioxidant components, the strongest scavenging ability of DPPH radical, ABTS+ radical, hydroxyl radical and iron reducing power, but weaker than TBHQ, and its semi-inhibitory concentration(IC50) of scavenging DPPH radical, ABTS+ radical and hydroxyl radical were 0.034,0.068, 0.067 mg/mL,respectively.In general,the hot air-dried Rosmarinus officinalis grew for ten months showed stronger antioxidant activity,which could well retain the fat-soluble antioxidant components of Rosmarinus officinalis,and it was suitable for industrial production

产量与经济效益共赢的高效生态农业模式:以弘毅生态农场为例

化学物质的大量投入以及元素不能循环导致农田生态系统退化,耕地质量和产量均呈下降趋势,食物链受到污染.本研究从低产田开始,通过秸秆养牛、腐熟牛粪还田恢复地力;以物理+生物方法控制虫害;以人工+机械管理杂草,停用农药、化肥和除草剂,同时不用地膜、人工合成激素、转基因种子生产优质安全食品,并在线上与线下销售.10年的长期实验结果表明,所在村庄农田生态环境改善,减少农药用量58.3%;物理+生物控虫效果明显,每盏灯年捕获量从2009年的33 kg下降到2014年的2.1 kg,下降93.8%;年消耗秸秆1000 t,秸秆利用率从1.1%提高到62.5%.有机肥还田提高了土壤生物多样性,有机果园蚯蚓数量317条m~(-2),而普通果园只有16条m~(-2);大量有机肥还田(75 t hm~(-2)),土壤有机质从实验初期的0.7%提高到2.4%.粮食产量从最初的11.43 t hm~(-2)提高到目前的17.43 t hm~(-2),其中冬小麦(Triticum aestivum)、夏玉米(Zea mays)、大豆(Glycine max(Linn.)Merr.)和花生(Arachis hypogaea Linn.)产量分别超出山东省平均水平42.6%,60.9%,32.2%和38.1%.由于质量好,产品已销售往除西藏以外的30个省、市、自治区,经济效益明显,平均每公顷效益是普通农田的3~5倍,带动所在村庄67户农民从事高效生态农业.本研究可为国家制定生态农业发展规划、精准扶贫、农村环境保护等提供科学依据

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies