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Catalytic combustion of methane over nano ZrO_2-supported copper-based catalysts

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Chinese Chemical Letters 2007年第8期18卷 993-996页

作者： Fen Fen qua Wei Chu Li Min Shi Mu Hua Chen Jin Yan Hu department of environmental Science and Engineering Sichuan University Chengdu 610065 China department of Chemical Engineering Sichuan University Chengdu 610065 China

The nano ZrO2-supported copper-based catalysts for methane combustion were investigated by means of N2 adsorption, TEM, XRD, H2-TPR techniques and the test of methane oxidation. Two kinds of ZrO2 were used as support, one （ZrO2-1） was obtained from the commercial ZrO2 and the other （ZrO2-2） was issued from the thermal decomposition of zirconium nitrate. It was found that the CuO/ZrO2-2 catalyst was more active than CuO/ZrO2-1. N2 adsorption, H2-TPR and XRD measurements showed that larger surface area, better reduction property, presence of tetragonal ZrO2 and higher dispersion of active component for CuO/ZrO2-2 than that of CuO/ZrO2-1. These factors could be the dominating reasons for its higher activity for methane combustion.

关键词： Nano ZrO2 Copper-based catalysts Catalytic combustion Methane

Post-disaster Assessment of Northeastern Coastal Region for the 2011 Sendai Earthquake and Tsunami

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Post-disaster Assessment of Northeastern Coastal Region for ...

Understanding Weather, Climate,and Birthweight:Findings from the *** Data Files 1969-78

2011 International Symposium on Water Resource and environmental Protection(ISWREP 2011)

作者： Ruopu Li School of Natural Resources University of nebraska-Lincoln Lincoln NE USA 68583 Shishi Liu Geography department University of California-Santa Barbara Santa Barbara CA USA 93106 Qingfeng Guan Yi Peng School of Natural Resources University of nebraska-Lincoln Lincoln NE USA 68583

The 2011 Sendai Earthquake has hit the north-east of Japan triggering a destructive tsunami that has caused extensive damage. A fast and effective post-disaster assessment is highly imperative for the recovery of this region. This study modeled the tsunami-affected areas of coastal Fukushima Prefecture using Landsat-7 ETM+ data and terrain analysis. The result shows that most of the coastal areas were significantly affected by the tsunami. The low-lying plains along the coast are particularly vulnerable to the tsunami.

关键词： Sendai Earthquake and Tsunami Sendai tsunami Fukushima Landsat NDVI GDEM

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Understanding Weather, Climate,and Birthweight:Findings from...

2011 International Symposium on Water Resource and environmental Protection(ISWREP 2011)

作者： Ge Lin College of Public Health 984350 University of nebraska Medical Center Omaha NE 68198-4350 Song Feng School of Natural Resources University of nebraska-Lincoln Lincoln NE 68583-0987 U.S.A.

Weather and extreme weather events are thought to be related to low birth weight. If this relation is held, it will have a wide range of public health impacts as birth weight is a key indicator of many life course health outcomes, and climate change increases the intensity of extreme weather events. The current study examines the relationship between birth weight and weather variables during the birth month while controlling other known risk factors. While the preliminary results seem to suggest a relationship between birth weight and extreme hot temperature, the result does not hold when individual and other risk factors are introduced. It is concluded that birth weight is primarily related to the temperature of birth month: the colder the month, the heavier the baby, to some degree. Even though we did not confirm the relationship between birth weight and extreme weather events, global warming is still likely to negatively affect birth outcomes.

关键词： birth weight ambient temperature, weather, extreme temperature days

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基于混合式控制结构的多机器人编队控制研究

计算机工程与应用 2010年第11期46卷 49-52页

作者：雷艳敏朱齐丹冯志彬哈尔滨工程大学自动化学院哈尔滨150001 长春大学电子信息工程学院长春130022 空军航空大学航空救生系长春130021

针对多机器人的编队控制问题,提出把基于Motor Schema的反应式控制结构和分层式结构结合起来,设计了一种混合式体系结构。根据反应式结构设计了四种基本行为,并提出利用模糊神经网络来设计各种行为。最后利用神经元来融合各种行为的输... 详细信息

针对多机器人的编队控制问题,提出把基于Motor Schema的反应式控制结构和分层式结构结合起来,设计了一种混合式体系结构。根据反应式结构设计了四种基本行为,并提出利用模糊神经网络来设计各种行为。最后利用神经元来融合各种行为的输出作为最终的输出,控制执行器来执行动作。该方法提高了整个编队系统的智能性和环境适应性。通过仿真验证了该方法的可行性和有效性。

关键词：编队控制体系结构模糊神经网络神经元

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环境因素影响牦母牛最高月产奶量的研究

四川畜牧兽医 2002年第B5期29卷 26-28页

作者：文勇立陈智华西南民族学院生命科技学院四川成都610041

牦母牛的最高月产奶量是具有重要育种价值和生产意义的数量性状,研究影响最高月产奶量的环境因素,可以通过提高月产奶量来实现提高牦母牛产奶性能的目的。孕前期体重和管理因素对最高月产奶量的影响极显著(p<0.01),孕后期简单补饲的影... 详细信息

牦母牛的最高月产奶量是具有重要育种价值和生产意义的数量性状,研究影响最高月产奶量的环境因素,可以通过提高月产奶量来实现提高牦母牛产奶性能的目的。孕前期体重和管理因素对最高月产奶量的影响极显著(p<0.01),孕后期简单补饲的影响显著(p<0.05)。孕前期体重因素中最差水平组可减少最高月产奶量达18.3kg(49.75%,p<0.01),管理因素中最好水平组比最差水平组增加最高月产奶量达14.9kg(35.92%,p<0.01),孕后期简单补饲组比对照组增加最高月产奶量达5.6kg(11.9,p<0.05)。

关键词：环境因素牦母牛最高月产奶量牦牛泌乳性能