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Experimental study on CCl_4/CH)4/O_2/N_2 oxidation

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Science china(Technological Sciences) 2010年第4期53卷 1016-1022页

作者： WANG Bo1,2,CHI Yong2,YAN JianHua2 & NI MingJiang2 1 College of Energy and Power Engineering,university of Shanghai for Science and Technology,Shanghai 200093,china 2 State Key laboratory of Clean Energy utilization,Zhejiang university,Hangzhou 310027,china 1. College of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai 200093 China2. State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

Oxidation within the system CCl4/CH4/O2/N2 is studied at atmospheric pressure in a tubular flow reactor to investigate the influence of reaction temperature and chlorine content on chlorinated waste combustion and find incineration process optimization methods for pollution *** reaction temperature varies from 700℃ to 1000℃ and the CCl4/CH4(or Cl/H) mole ratio of the inlet mixture varies from 0.21 to *** profiles are measured with *** is shown that at the same initial CCl4 concentration and reaction temperature adding CH4 favors CCl4 destruction and CO2 *** the destruction and removal efficiency(DRE) of CH4 decreases with lower Cl/H and higher concentrations of toxic products of incomplete combustion such as COCl2 and CH3Cl are formed at the same *** chlorine in the system favors CH4 decomposition,but it also inhibits further oxidation of *** temperature assists in both CCl4 destruction and CH4 conversion,and the concentration of toxic combustion intermediates is *** the temperature is the most effective way to enhance CCl4 *** CO2 concentration increases with temperature.A CO concentration peak is observed around 800℃:with a certain Cl/H,the CO concentration first increases with temperature and then *** effect of increasing CH4 concentration on CCl4 destruction becomes mild above 900℃.Rather,it enhances the interaction between chlorine and carbonaceous radicals,which leads to higher concentration of toxic products.

关键词： hazardous waste destruction and removal efficiency(DRE) oxidation carbon tetrachloride chlorinated compounds methane

Phylogenetic diversity of bacteria associated with the marine sponge Agelas robusta from South china Sea

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Acta Oceanologica Sinica 2010年第5期29卷 65-73页

作者： SUN We DAI Shikun WANG Guanghua XIE Lianwu JIANG Shumei LI Xiang Key laboratory of Marine bio-resources Sustainable utilization （LMB-CAS） Guangdong Key Laboratory of Marine Materia Mediea （LMMM-GD） South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate university of the Chinese Academy of Sciences Beijing 100049 China Central South university of Forestry and Technology Changsha 410004 China

It is well known that marine sponges harbor large numbers of bacteria,some of which have been proved to be *** diversity of bacteria in marine sponges distributed along the coast of South china Sea has been previously studied but that of bacteria in sponges inhabiting the open sea has been rarely *** this report,the diversity of bacteria associated with the marine sponge Agelas robusta from a remote coral reef in the South china Sea was documented employing 16S rDNA library construction,amplified ribosomal DNA restriction analysis（ARDRA） and phylogenetic analysis.A total of 32 phylotypes were finally categorized in nine phyla including Cyanobacteria,Proteobacteria,Chloroflexi,Firmicutes,Actinobacteria,Acidobacteria,Planctomycetes,Bacteroidetes and *** dominant phylum was Proteobacteria whereas the dominant genus was Synechococcus in *** spongespecific bacteria were also found in the bacteria population,but the proportion（5 OTUs/32 OTUs） was much lower than other *** study reveals the phylogenetic diversity of bacteria in *** and confirms the presence of some sponge-specific bacteria in the South china *** the diversity of sponge-associated bacteria in china assists to exploit the bacteria resources for biotechnology.

关键词： South china Sea Agelas robusta phylogenetic diversity sponge-specific bacteria

The EST Analysis of A Suppressive Subtraction cDNA Library of Chinese Wild Vitis pseudoreticulata Inoculated with Uncinula necator

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Agricultural Sciences in china 2010年第2期9卷 233-241页

作者： SHI Jiang-li, WANG Yue-jin, ZHU Zi-guo and ZHANG Chao-hong Key laboratory of Horticultural Plant Germplasm utilization in Northwest china, Ministry of Agriculture/Shaanxi Key laboratory of Molecular biology for Agriculture/College of Horticulture, Northwest A&F university, Yangling 712100, P.R.china [a] Key laboratory of Horticultural Plant Germplasm utilization in Northwest china Ministry of Agriculture/Shaanxi Key Laboratory of Molecular Biology for Agriculture/College of Horticulture Northwest A&F University Yangling 712100 P.R. China

Uncinula necator is a worldwide serious fungus disease causing annual heavy lost on grapevine production. In order to get more informations on defense related EST sequences and help breeding program, we constructed and characterized a suppression subtractive hybridization cDNA library with artificially inoculated leaves and control Chinese wild Vitis pseudoreticulata clone Baihe-35-1, which is highly resistant to powdery mildew. In the library, the length of 58 EST fragments known as putative functions varied from 130 to 800 bp, and 60% of the ESTs exhibited high similarity to known sequences in database of GenBank with BLASTX analysis. These genes were involved in stress/defense response, detoxification, signal transduction, disease defense, and etc., and 14 ESTs remained unknown or hypothetical proteins, which may be new genes. The experiment provided an important basis for studying the disease-resistance mechanism and obtaining the genes for the aim of improving grapevine powdery mildew resistance.

关键词： Chinese wild Vitis pseudoreticulata disease resistance SSH cDNA library EST sequence

Experimental investigation of the influence of electric field on frost layer growth under natural convection condition

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Progress in Natural Science:Materials International 2006年第4期16卷 410-415页

作者： ZHANG Xinhua, LIU Zhongliang, WANG Jieteng, GOU Yujun, MENG Sheng and MA Chongfang Key laboratory of Enhanced Heat Transfer and Energy conservation, Ministry of Education Key laboratory of Heat Transfer and Energy Conversion, Beijing Education Commission, Beijing university of Technology, Beijing 100022, china [a]Key laboratory of Enhances Heat Transfer and Energy conservation Ministry of Education Key laboratory of Heat Transfer and Energy Conversion Beijing Education Commission Beijing University of Technology Beijing China

The influence of direct current (DC) electric field on the thickness and mass of frost on a cold vertical plate was investigated. The photos of frost layer growth were taken with and without the presence of electric field, and results showed that the electric field has a strong influence on the frost thickness. The influences of cold plate temperature and ambient temperature on frost thickness and frost mass were also investigated under the natural convection condition with electric field. Experimental results demonstrated that the cold plate temperature has very strong effect on the frost layer thickness, but its influence on frost mass is minor; the influence of ambient temperature on the frost mass is more obvious than that on the frost thickness.

关键词： frost formation electric field natural convection.

A decision-making model of development intensity based on similarity relationship between land attributes intervened by urban design

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Science china(Technological Sciences) 2010年第7期53卷 1743-1754页

作者： WANG JianGuo1, ZHANG Yu2 & FENG Han3 1 School of Architecture, Southeast university Key laboratory for Urban and Architectural Heritage conservation, Ministry of Education, Nanjing 210096, china 2 School of Architecture, Southeast university, Nanjing 210096, china 3 Faculty of Architecture, Delft university of Technology, 2628 CR Delft, Netherlands 1. Key laboratory for Urban and Architectural Heritage conservation Ministry of Education Nanjing 210096 China2. School of Architecture Southeast University Nanjing 210096 China3. Faculty of Architecture Delft University of Technology 2628 CR Delft Netherlands

The paper presents a dynamic model intervened by urban design for the decision-making of land development intensity, which expresses the inherent interaction mechanism between lands based on the evaluation of land attributes and their similarity relationship. Each land unit is described with several factors according to their condition and potential for development, such as land function, accessibility, historical site control, landscape control, and so on. Then, the dynamic reference relationship between land units is established according to the similarity relationship between their factors. That means lands with similar conditions tend to have similar development intensities, which expresses the rule of the spontaneous urban development. Therefore, the development intensities of the pending lands can be calculated by the confirmed ones. Furthermore, the system can be actively intervened by adjusting the parameters according to urban design or planning intentions. And the reaction of the system offers effective support and reference for reasonable decision. The system with multiple intervention input is not only a credible tool for deriving development intensities, but also a platform to activate urban design conception. Above all, the system as a socio-technical tool integrates the optimization of form, function and environment, and embodies the principle of impersonality, justice and flexibility in the decision of land development intensity.

关键词： land development intensity urban design land attribute similarity relationship complex system FAR

Integrated erosion control measures and environmental effects in rocky mountainous areas in northern china

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International Journal of Sediment Research 2010年第3期25卷 294-303页

作者： HE Jijun1, CAI Qiangguo2, LI Guoqiang3, and WANG Zhongke41 Ph. D, Lecturer, Capital Normal university, Elementary Educational College, Beijing 100048, china State Key laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Water and Soil conservation, Chinese Academy of Sciences and Ministry of Water resources, Yangling 712100 Shanxi, china. 2 Prof., Institute of Geographical Sciences and Natural resources Research, Key laboratory of Water Cycle and Related Land Surface Processes, CAS, Beijing 100101, china, 3 Graduate student, Huazhong Agricultural university, College of resources and Environment, wuhan 430070, china 4 Prof., Zhangjiakou Supervision Station of Water Conservancy Project, Zhangjiakou Supervision Sub-station of Soil and Water conservation and environment, Zhangjiakou 075000, china [a] Ph. D Lecturer Capital Normal University Elementary Educational College Beijing 100048 China State Key laboratory of Soil Erosion Dryland Farming on the Loess Plateau Institute of Water Soil conservation Chinese Academy of Sciences Ministry of Water resources Yangling 712100 Shanxi China [b] Prof. Institute of Geographical Sciences Natural resources Research Key Laboratory of Water Cycle Related Land Surface Processes CAS Beijing 100101 China [c] Graduate student Huazhong Agricultural University College of Resources Environment wuhan 430070 China [d] Prof. Zhangjiakou Supervision Station of Water Conservancy Project Zhangjiakou Supervision Sub-station of Soil Water conservation environment Zhangjiakou 075000 China

Based on observations of runoff plots and field investigations of gully cross-sections, impacts of various soil and water conservation measures on runoff and sediment yield are analyzed for different rainfall conditions. The results show that antecedent rainfall and rainfall intensity are the main factors affecting the runoff and soil erosion processes. Rainfall events with antecedent rainfall can produce high runoff and sediment yield. Large differences in the characteristics of two rainfall events will result in greater variations of total runoff and sediment yield from the same runoff plot. Under the same soil control measure and rainfall condition, soil and water conservation measures can reduce the impacts of antecedent rainfall and rainfall intensity on runoff and soil erosion. Among various measures, level terrace seems to be the greatest for soil conservation purposes. Combining with engineering measures,Vegetation measures is also effective in controlling runoff and soil erosion. In the initial stage of vegetation enclosure measures, engineering measure is necessary to improve the environment for ecological recovery. Gully head protection can control gully erosion effectively, but the effectiveness of gully head protection would be reduced when rainfall intensity increases. Therefore, the design of a gully head protection structure must be based on local hydrological conditions.

关键词： Rainfall character Antecedent rainfall Gully head protection Cumulated erosion amount

Fractal model for simulation of frost formation and growth

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Science china(Technological Sciences) 2010年第3期53卷 807-812页

作者： LIU YaoMin,LIU ZhongLiang,HUANG LingYan&SUN JunFang Education Ministry Key laboratory of Enhanced Heat Transfer and Energy conservation,College of Environmental and Energy Engineering,Beijing university of Technology,Beijing 100124,china 1. Education Ministry Key laboratory of Enhanced Heat Transfer and Energy conservation College of Environmental and Energy Engineering Beijing University of Technology Beijing 100124 China

A planar fractal model for simulation of frost formation and growth was proposed based on diffusion limited aggregation(DLA)model and the computational simulation was carried out in this *** changing the times of program running circulation and the ratio of random particles generated,the simulation figures were gained under different conditions.A microscope is used to observe the shape and structure of frost layer and a digital camera with high resolution is used to record the pattern of frost layer at different *** comparing the simulation figures with the experimental images,we find that the simulation results agree well with the experimental images in shape and the fractal dimension of simulation figures is nearly equal to that of experimental *** results indicate that it is reasonable to represent frost layer growth time with the program circulation times and to simulate the frost layer density variation during its growth process by reducing the random particle generation *** feasibility of using the suggested model to simulate the process of frost formation and growth was *** insufficiencies and its causes of this fractal model are also discussed.

关键词： fractal frost formation and growth DLA simulation

Oligomerization of Ethylene by Fe(salphen)/EAO and Fe(salen)/EAO Catalysts

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Chinese Journal of Catalysis 2000年第2期21卷 99-100页

作者： QIAN Mingxing, WANG Mei, HE RenOpen laboratory of Comprehensive utilization for Carbon resources, Dalian university of Technology, Dalian 116012, china) 大连理工大学碳资源综合利用开放实验室辽宁大连 116012

The oligomerization was studied of ethylene catalyzed by Fe(salphen) (A, salphen = N,N'-o-phenylenebis (salicylideneaminato)) and Fe(salen) (B, salen = N,N'-ethylenebis (salicylideneaminato)) which were prepared according to earlier description. The catalytic activity and selectivity of the two complexes with EAO (ethylaluminoxane) as cocatalyst for ethylene oligomerization were studied at various reaction temperatures, Al/Fe ratios, and reaction time. Both A and B showed higher catalytic activity and selectivity for low-carbon olefins. The catalytic activity of A/EAO and B/EAO catalysts for ethylene oligomerization were strongly affected by the reaction temperatures. When temperature was raised from 90°to 200°C, the activity increased by 25 times for A/EAO and by 26 times for B/EAO. Both catalysts displayed decreased selectivity for low-carbon linear α-olefins as the temperature was raised. The effect of n(Al)/n(Fe) ratio on ethylene oligomerization was also studied.

关键词： ethylene oligomerization iron complexes ethylaluminoxane

Application analysis of empirical mode decomposition and phase space reconstruction in dam time-varying characteristic

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Science china(Technological Sciences) 2010年第6期53卷 1711-1716页

作者： ZHANG ZhiJun1,2,3,GU ChongShi1,2,BAO TengFei1,2,ZHANG Lan1,2 & YU Hong1,2 1 State Key laboratory of Hydrology-Water resources and Hydraulic Engineering,Hohai university,Nanjing 210098,china 2 National Engineering Research Center of Water resources Efficient utilization and Engineering Safety,Hohai university,Nanjing 210098,china 3 Department of Civil,Environmental and Geomatic Engineering,Swiss Federal Institute of Technology,Zurich 8093,Switzerland 1. State Key laboratory of Hydrology-Water resources and Hydraulic Engineering Hohai University Nanjing 210098 China2. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 China3. Department of Civil Environmental and Geomatic Engineering Swiss Federal Institute of Technology Zurich 8093 Switzerland

In view of some courses of the time-varying characteristics processing in the analysis of dam deformation,the paper proposes a new method to analyze the dam time-varying characteristic based on the empirical mode decomposition and phase space reconstruction *** of all,to reduce the influences on the traditional statistical model from human factors and assure the analysis accuracy,response variables of the time-varying characteristic are obtained by the way of the empirical mode decomposition;and then,a phase plane of those variables is reconstructed to investigate their processing *** methods have already been applied to an actual project and the results showed that data interpretation with the assists of empirical mode decomposition and phase space reconstruction is effective in analyzing the perturbations of response variables,explicit in reflecting the entire development process,and valid for obtaining the evolution rules of the time-varying *** methodology is a powerful technical support for people to further master the rules of dam operation.

关键词： dam safety monitoring dam time-varying characteristic empirical mode decomposition phase space reconstruction