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THE PROPERTIES OF SILICA FUME-MAGNESIUM OXYCHLORIDE CEMENT MATERIALS

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 1038-1040页

作者： H.F.Yu 1) ,P.Q.Liu 1) and W.H.Wang 2) 1) Department of Materials Science and Engineering, shenyang Architectural and Civil Engineering Institute,shenyang 110015,china.2) Department of Airport, CAAC Eastnorth Management, shenyang 110043.Chin

The properties of a new magnesium Oxychloride cement (MOC) material formed by silica fume uniformly mix in MOC paste was presents. The influence of silica fume on the water resistance and compressive strength of MOC paste was invesigated in this study. It is shown that when 3. weight percent of silica fume is added to the MOC paste, a high strength and water resisting new material with 112MPa compressive strength and 1 00 water resisting coefficient could by obtained.

关键词： silica fume magnesium oxychloride cement (MOC),compressive strength,water resistance

Spectral response of rice(Oryza sativa L.) leaves to Fe^(2+) stress

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Science china.Life Sciences) 2009年第8期52卷 747-753页

作者： CHI GuangYu1,2,CHEN Xin1,SHI Yi1 & LIU XinHui3.1 Key Laboratory of Terrestrial Ecological Process,Institute of Applied Ecology,Chinese Academy of Sciences,shenyang 110016,china.2 Graduate School of Chinese Academy of Sciences,Beijing 100049,china.3.State Key Joint Laboratory of Environmental Simulation and Pollution Control,School of Environment,Beijing Normal University,Beijing 100875,{3. Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang China Graduate School of Chinese Academy of Sciences Beijing China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing China

In the management of lake eutrophication,the regulation effect of Fe is considered,in addition to the controlling nitrogen-and phosphorus *** on the "Fe hypothesis",this paper tentatively applied plant spectral response to the remote sensing early-warning mechanism of lake eutrophication.A laboratory water culture experiment with rice(Oryza sativa L.) was conducted to study Fe uptake by plants and the chlorophyll concentration and visible-near infrared spectrum of vegetable leaves as well as their interrelations under Fe2+ *** spectral indices,i.e.,A1(integral value of the changes of spectral reflectivity in the range 460―670 nm under Fe2+ stress),A2(integral value of the changes of spectral reflectivity in the range of 760―1000 nm under Fe2+ stress) and S(blue-shift range of red edge curve under Fe2+ stress),were used to establish quantitative models about the relationships between the rice leaf spectrum and Fe2+ *** the increase of Fe2+ in a culture solution,the Fe content in rice plants increased,while the chlorophyll concentration in vegetative leaves *** spectral reflectivity of vegetable leaves increased in the visible light band but decreased in the near infrared band,and the blue-shift range of the red edge curve *** indices A1,A2 and S all had significant correlations with the Fe content in rice leaves,the correlation coefficient being respectively 0.951(P 0.96) and predict the Fe level in rice leaves.

关键词： rice(Oryza sativa L.) spectrum Fe2+ lake eutrophication

Effect of Heat Treatment on the Mechanical Properties and the Carbide Characteristics of a High Strength Low Alloy Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 143-147页

作者： ZHANG Wen-feng,HU Ping,ZHOU Qiang-guo,YAN Wei,SHAN Yi-yin,YANG Ke (Institute of Metal Research,Chinese Academy of Sciences,shenyang 110000,Liaoning,china. Chinese Acad Sci Inst Met Res Shenyang 110000 Liaoning Peoples R China

Effect of heat treatment on the mechanical properties and the corresponding morphology changes of carbides such as (NbTi)C and Mo,Cr rich carbides in a high strength steel was studied in the *** was found that the strength depend more on tempering temperature than quenching *** the toughness seemed to be sensitive to both quenching temperature and tempering *** the as water quenched condition,the toughness gave a peak value at the quenching temperature of 860℃.Under the as tempered condition,the toughness showed a temper brittleness at the temperature range of 23.℃ to 450℃.The morphology changes of the carbides in the experimental steel were explained from the view of the thermal dynamic behavior.

关键词： ultra high strength steel carbides heat treatment mechanical properties

Investigations on removal of SO_2 from flue gas by aerosol formation in pulsed corona discharge process

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Journal of Environmental Sciences 1998年第2期10卷 17-23页

作者： Zhao Zhi bin, Liu Ji yong Department of Environmental and Chemical Technology, Northeast Electric Power Research Institute, shenyang 110006, china.Yu Cun qing, Li Ji hong Department of Environmental Protection, Bureau of Northeast Electric Power Industry, shenyang 110006, {3.

The removal of SO 2 from flue gas by pulsed corona discharge in presence of ammonia was experimentally investigated. The results showed that the SO 2 removal mainly depends on thermal reaction of SO 2 with NH 3.and enhancements of 0%—25% by pulsed corona discharge in the range of the specific energy 0—5 Wh/Nm 3. The aerosol mass concentration, mainly composed of ammonium sulfate, increased with specific energy dissipated into the reactor. With an initial concentration of 2000—2100 ppmv SO 2 and energy consumption of 3.Wh/Nm 3. when a stoichiometric amount of ammonia is injected, the removal efficiency of SO 2 and percentage of ammonium sulfates in reaction products are all ≥80%. The collection efficiency of the reactor for aerosol is about 74% at a flue gas temperature of 60 to 65℃ and a water vapor content of 9% to 11% volume.

关键词： pulse corona discharge desulphurization of flue gas collection of reaction products.

Study on water-demand Regularities and water Use Efficiencies of Rice under Paper mulching

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Study on Water-demand Regularities and Water Use Efficiencie...

2011 International Conference on New Technology of Agricultural Engineering(ICAE 2011)

作者： LIU Cuihong College of Engineering shenyang Agricultural University shenyang P.R.china.REN Wentao College of Engineering shenyang Agricultural University shenyang P.R.china

It is great significant for field water management of the rice to study water-demand regularities of rice under paper *** order to explore the evapotranspiration characteristics of rice during various growing stage and analyze the regularities of influence on the soil water and yield of rice under paper mulching,a potted experiment under paper mulching was done in {3.,china.*** results show that the water requirement of rice is attaining maximum in booting stage,and the water-saving effect of paper mulching is obvious（P＜0.05） from reviving to booting *** mulching can suppress the water leakage effectively,and its effect on soil moisture content is *** yield and water use efficiency of rice under paper mulching improve 6.82%and 10.91%respectively than without paper *** good usage of controlling irrigation technology and effective utilization of agricultural water resources must improve water use efficiency,which will give full play roles to saving water and increasing production of papermulching planting technology.

关键词： rice paper mulching water-demand regularites water use efficiencies

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埋地UPVC供水管线静力试验

沈阳建筑大学学报（自然科学版） 2009年第6期25卷 1069-1073页

作者：周静海刘飞杨永生沈阳建筑大学科技产业处辽宁沈阳110168 沈阳建筑大学土木工程学院辽宁沈阳110168 沈阳建筑大学学报编辑部辽宁沈阳110168

目的分析埋地UPVC地下供水管线柔性接口的抗震性能,建立力与接口位移的数学模型.方法在覆土的条件下,对接口采用胶圈连接的6根管径为3.5 mm和6根管径为200 mm UPVC供水管,进行抗拉静载试验.结果6组覆土管径3.5 mm和6组覆土管径200 mm试... 详细信息

目的分析埋地UPVC地下供水管线柔性接口的抗震性能,建立力与接口位移的数学模型.方法在覆土的条件下,对接口采用胶圈连接的6根管径为3.5 mm和6根管径为200 mm UPVC供水管,进行抗拉静载试验.结果6组覆土管径3.5 mm和6组覆土管径200 mm试件的P-S曲线的上下浮动不是很大,所以可以用平均值法取值.分别对两种管径的P-S关系曲线取平均值,进行二次曲线拟合和三次曲线拟合,建立了数学模型.结论二次多项式拟合误差较大,三次拟合误差较小,基本控制在±10%范围内,对于有精度要求实际工程中,建议使用三次多项式拟合模型.

关键词：管线抗震拟合精度误差分析

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银杏叶提取物的多维指纹图谱研究

色谱 2003年第6期21卷 562-567页

作者：马欣孙毓庆沈阳药科大学药学院辽宁沈阳110016

利用高效液相色谱/二极管阵列检测/质谱/质谱法,建立了银杏叶提取物的多维指纹图谱,同时建立了总离子流指纹图谱,使同时检测银杏叶中两类有效成分黄酮和内酯类化合物成为可能。采用ZorbaxSB C18色谱柱(250mm×4.6mmi d ,5μm),流动相为... 详细信息

利用高效液相色谱/二极管阵列检测/质谱/质谱法,建立了银杏叶提取物的多维指纹图谱,同时建立了总离子流指纹图谱,使同时检测银杏叶中两类有效成分黄酮和内酯类化合物成为可能。采用ZorbaxSB C18色谱柱(250mm×4.6mmi d ,5μm),流动相为水(含0 5%甲酸)和乙腈,二元梯度洗脱,流速为1 0mL/min,3.0nm下检测。采用电喷雾离子源,负离子检测模式下采集质谱数据。利用指纹图谱相似度计算软件,以芦丁为内参比峰,考察了不同厂家银杏叶提取物与标准银杏叶提取物EGb761的相似度。初步认为相似度低于0 8的EGb样品与EGb761差异显著。该指纹图谱的建立为银杏叶提取物的质量控制提供了一定的依据。

关键词：银杏叶提取物多维指纹图谱中药成分分析高效液相色谱二极管阵列检测器质谱

CONCENTRATION DISTRIBUTION OF ALLOYING ELEMENTS IN SURFACE LAYER OF Ti ALLOY MELTS

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Acta Metallurgica Sinica(English Letters) 1992年第8期5卷 142-144页

作者： KONG Fanya YANG Kenu LU Yong’an SUN Shuxue Institute of Metal Research,Academia Sinica,shenyang,china

The concentration distribution of alloying elements such as Al,Sn,V,Si and Mo in surface layer of quenched Ti alloy melts(TC4,TA 7 and TC9)has been determined by *** al- loy samples were melted and evaporized by electron beam in water cooled copper *** activity coefficient of alloy elements in Ti alloy melts are:γ_(Al)=0.009—0.018 and γ_(Sn)=0.066 —0.123.at 1921—2106℃;γ_V=0.713.at 2021℃;γ_(Si)=0.020 and γ_(Mo)=0.913.at 1921℃.The rate controlling steps of the evaporation of alloying elements Al,Sn,V,Si and Mo from Ti al- loy melts have been discussed with the data of evaporation activation energies of such alloy el- ements.

关键词： titanium alloy evaporation activity coefficient Surface concentration

Simulating the exchanges of carbon dioxide, water vapor and heat over Changbai Mountains temperate broad- leaved Korean pine mixed forest ecosystem

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Science china.Earth Sciences 2005年第Z1期48卷 148-159页

A process-based ecosystem productivity model BEPS (Boreal Ecosystem Productivity Simulator) was updated to simulate half-hourly exchanges of carbon, water and energy between the atmosphere and terrestrial ecosystem at a temperate broad-leaved Korean pine forest in the Changbai Mountains, china. The BEPSh model is able to capture the diurnal and seasonal variability in carbon dioxide, water vapor and heat fluxes at this site in the growing season of 2003. The model validation showed that the simulated net ecosystem productivity (NEP), latent heat flux (LE), sensible heat flux (Hs) are in good agreement with eddy covariance measurements with an R2 value of 0.68, 0.86 and 0.72 for NEP, LE and Hs, respectively. The simulated annual NEP of this forest in 2003.was 3.0.5 gC/m2, and was very close to the observed value. Driving this model with different climate scenarios, we found that the NEP in the Changbai Mountains temperate broad-leaved Korean pine mixed forest ecosystem was sensitive to climate variability, and the current carbon sink will be weakened under the condition of global warming. Furthermore, as a process-based model, BEPSh was also sensitive to physiological parameters of plant, such as maximum Rubisco activity (Vcmax) and the maximum stomatal conductance (gmax), and needs to be carefully calibrated for other applications.

关键词： carbon cycle, water cycle, BEPSh model, eddy covariance measurement, china.LUX.