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陆地生态系统碳循环对土地利用变化的响应

土壤通报 2010年第1期41卷 216-221页

作者：王丽丽宋长春中国科学院东北地理与农业生态研究所吉林长春130012 中国科学院研究生院北京100039

陆地生态系统碳循环在全球碳循环中占有重要地位,而土地利用变化是估测陆地生态系统碳储存与释放的最大不确定性因素。植被和土壤是陆地生态系统的两大碳库,是碳循环中的两个重要纽带,土地利用变化影响陆地生态系统土壤和植被碳的固定... 详细信息

陆地生态系统碳循环在全球碳循环中占有重要地位,而土地利用变化是估测陆地生态系统碳储存与释放的最大不确定性因素。植被和土壤是陆地生态系统的两大碳库,是碳循环中的两个重要纽带,土地利用变化影响陆地生态系统土壤和植被碳的固定、积累与释放,从而影响整个碳循环过程。本文主要从土壤和植被碳库的角度出发,综述了近年来土地利用变化对陆地生态系统碳循环的影响及其机理,以及研究方法进展,着重分析了模型在此方面的应用;并提出了未来研究方向的展望。

关键词：土地利用变化陆地生态系统植被碳库土壤碳库模型

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复杂场景中海量外存地形模型的实时绘制算法

系统仿真学报 2009年第20期21卷 6510-6514,6518页

作者：郎兵方金云韩承德中国科学院计算技术研究所空间信息处理技术实验室北京100190 中国科学院研究生院北京100049

针对地形相关复杂三维场景应用需求,提出一种海量地形外存实时绘制算法,该方法使用离散细节层次技术并结合视点相关动态连续细节层次选择。基于元网格连通边权值简化地表模型,并基于Hausdorff距离进行视点无关批LOD误差控制。提出一种... 详细信息

针对地形相关复杂三维场景应用需求,提出一种海量地形外存实时绘制算法,该方法使用离散细节层次技术并结合视点相关动态连续细节层次选择。基于元网格连通边权值简化地表模型,并基于Hausdorff距离进行视点无关批LOD误差控制。提出一种海量数据实时调度方法,通过分层增量控制,两级数据预取和改进的快速视锥裁减实现了对外存数据的动态装载与调度。实验表明,该算法处理海量地形数据时占用较低系统资源,从而能够在复杂场景环境下进行快速实时绘制。

关键词：地形绘制细节层次地表简化外存模型元网格

The observation of pyrenoids of order Ulvales collected from Qingdao coast

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The observation of pyrenoids of order Ulvales collected from...

庆祝中国藻类学会成立30周年暨第十五次学术讨论会

作者： Linhong Teng~(1,2) Lanping Ding~(1**) and Xiaoli Hu~3 (1.Institute of Oceanology,chinese academy of sciences,Qingdao 266071,china 2.graduate university of chinese academy of sciences,beijing 100049,china 3.College of marine life science,Ocean university of china,Qingdao 266003,china)

＜正＞Pyrenoids found in green algal Order Ulvales have important taxonomical *** pyrenoids of several usual kinds of green algae collected along the Qingdao coast were *** the use of light microscopy,the morphology and distribution of pyrenoids,with its change by different parts of frond and time period,the optimal conditions are *** basal parts of frond have more distinct pyrenoids with average diameter 2.42μm in Enteromorpha *** some species,pyrenoids are not clear,and darkness can make them more *** process of pyrenoid in different algae is *** found that in ***,pyrenoids disappear faster than those in *** cells of most green algae observed,pyrenoids appear as single spherical ***,the pyrenoids of marginal parts are more observable than those of the center parts.

关键词： Order Ulvales morphology pyrenoid taxonomy apoptosis process

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煤与生物质热重分析及动力学研究

燃料化学学报 2009年第5期37卷 538-545页

作者：武宏香李海滨赵增立中国科学院广州能源研究所中国科学院可再生能源与天然气水合物重点实验室广东省新能源和可再生能源研究开发与应用重点实验室广东广州510640 中国科学院研究生院北京100049

利用热重分析仪对稻秆、麦秆、木屑和煤单独及混合热解特性进行了研究。通过对不同混合比例热解与单独热解对比表明,混合热解中不同生物质起始热解温度、生物质挥发分最大析出温度、煤挥发分最大析出温度随着煤混合比例的变化呈规律性... 详细信息

利用热重分析仪对稻秆、麦秆、木屑和煤单独及混合热解特性进行了研究。通过对不同混合比例热解与单独热解对比表明,混合热解中不同生物质起始热解温度、生物质挥发分最大析出温度、煤挥发分最大析出温度随着煤混合比例的变化呈规律性变化。对混合热解实验数据与单独热解参数按混合比例后特性参数分析表明,混合热解导致固体产物产率提高。实验通过对稻秆两种方式的脱灰及脱挥发分处理后混合热解分析,脱挥发分稻秆与脱灰分稻秆对煤的热解都起到了促进作用,证明了生物质中的碱/碱土金属能促进煤在较低温度下热解,硅元素对热解速率起抑制作用。推测生物质与褐煤的共热解中存在协同作用。

关键词：生物质褐煤共热解

Quantitative Analysis on the Relationship between Population Distribution and Environment Factors in Mountain Area

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Meteorological and Environmental Research 2011年第3期2卷 77-80页

作者： SUN Yu-lian1,2,ZHAO Yong-tao1,CAO Wei-chao1,2,YU Hui1,MA Yue-wei1,2 1.Institute of Mountain Hazards and Environment,chinese academy of sciences,Chengdu 610041,china 2.graduate university of chinese academy of sciences,beijing 100049,china

[Objective] The aim was to analyze the relationship between population distribution and environment factors in mountain area quantitatively.[Method] Taking the contiguous area of Sichuan,Yunnan and Guizhou Province as study object,population density and residential point density were chosen as the indices of population distribution,and the quantitative relationship between population distribution and environment factors (including altitude,topography relief amplitude,land use,road network and river network) in mountain area was analyzed.[Result] Altitude and topography relief amplitude in mountain area had obvious negative correlation with population density and residential point density,and the correlation coefficients with population density were-0.731 *** addition,residential points were fewer in the region far from rivers,but there was no obvious correlation between population density and river network *** point density was higher in cultivated land and construction land,and population density had obvious positive correlation with the area proportions of cultivated land and construction land,with the correlation coefficients of 0.895 and 0.726,***,the more distant from road,the smaller residential point density,and there was obvious positive correlation between population density and road network density,with the correlation coefficient of 0.823.[Conclusion] The study could lay a foundation for the further development of spatiality of population data in study region.

关键词： Population distribution Environmental factors Quantitative analysis Mountain area china

A new record species of epiphytic marine green algae,Entocladia leptochaete（Chaetophoraceae,Chlorophyta）with its primary experimental biology from china

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A new record species of epiphytic marine green algae,Entocla...

庆祝中国藻类学会成立30周年暨第十五次学术讨论会

作者： Yunyan Deng~(1,2) Xiaorong Tang~3 Lanping Ding~(1**) and Shaoxing Lian~1 (1.Institute of Oceanology,chinese academy of sciences,Qingdao 266071,china 2.graduate university of chinese academy of sciences,beijing 100049,china 3.Marine Genetics and Breeding Laboratory,Ocean university of china,Qingdao 266003,china)

＜正＞Entocladia leptochaete,a new record species in Chaetophoraceae（Chlorophyta）, was observed during our recent laboratory culture of marine benthic green alga, Chaetomorpha *** mainly morphological characteristics of the species are as follows:Thallus is composed of microscopic,prostrate,uniseriate branched filaments. Elongated filaments with some short lateral branches consolidate centrally into *** branches in the external frond are rectangular to slightly swollen and sometimes irregular or distorted at the *** at external frond is rounded or irregular in shape,7-14（-17）μm diameter,14-33μm long,3-5 times as long as *** of cells have 2-4（-6） pyrenoids, occasionally single with diameter of pyrenoids ranging from 2.5μm to 5μ*** parietal chloroplasts are slightly lobed. The first report of this species in china will bridge its distributional range from Europe to *** morphologies,taxonomy and distribution were introduced and discussed in *** culture experiments at different temperatures and light intensities were also carried *** results suggested that the species could adapt well to extensively aquicolous environment.

关键词： china Entocladia leptochaete morphology and taxonomy new record experimental biology

蜂窝状堇青石基CuO／Al2O3催化剂烟气脱硝性能

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石油化工 2008年第5期37卷 512-517页

作者：苏军划刘振宇黄张根赵有华张先龙中国科学院山西煤炭化学研究所煤转化国家重点实验室

以铝粉和氯化铝为原料制备了Al2O3溶胶,并涂敷在蜂窝状堇青石载体上,再负载CuO制备了蜂窝状堇青石基CuO/Al2O3催化剂;考察了Al2O3和CuO负载量对催化剂脱硝活性和稳定性的影响。结果表明,催化剂的比表面积和孔结构不是影响催化剂脱硝活... 详细信息

以铝粉和氯化铝为原料制备了Al2O3溶胶,并涂敷在蜂窝状堇青石载体上,再负载CuO制备了蜂窝状堇青石基CuO/Al2O3催化剂;考察了Al2O3和CuO负载量对催化剂脱硝活性和稳定性的影响。结果表明,催化剂的比表面积和孔结构不是影响催化剂脱硝活性的主要原因;Al2O3负载量对催化剂的稳定脱硝活性无影响,但影响脱硝稳定性,Al2O3负载量越大,催化剂的脱硝活性越稳定;CuO只有负载在Al2O3涂层载体上,催化剂才具有较高的脱硝活性,CuO负载量对催化剂的稳定脱硝活性有影响,当CuO高度分散时,稳定脱硝活性随CuO负载量的增大而增加,在反应100h时,不同CuO负载量的催化剂的脱硝活性趋于相同。

关键词：氧化铝涂层氧化铜堇青石选择催化还原烟气脱硝稳定性

Preliminary Study on the Life History of Chaetomorpha valida（Cladophoraceae,Chlorophyta） in laboratory culture

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Preliminary Study on the Life History of Chaetomorpha valida...

庆祝中国藻类学会成立30周年暨第十五次学术讨论会

＜正＞Chaetomorpha valida Kützing,as a fouling green alga,was found in aquaculture ponds in coast of northern china recent *** spring and summer,mass occurrence of the macroalga causes great damage to *** on the unialgal culture and microscope observation,development stages of life cycle of the species were studied. Its life history is typical alternation of generations between isomorphic,unisexual haploid gametophytes and diploid *** and female gametes are released from gametangia of gametophytes to fuse into zygotes and settled,then developed into new *** reproduction was presented by quadriflagellate *** germination pattern of both zygote and zoospore were a bipolar erect type as observed in some other species of *** results also contribute to increase the understanding about seasonal abundances of the macroalgae.

关键词： Chaetomorpha valida life history unialgal culture alternation of generations

Mapping the MLT tides from meteor radar observations of a meridional chain

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Mapping the MLT tides from meteor radar observations of a me...

中国地球物理学会第二十七届年会

作者： You Yu~(1,2) Weixing Wan~(1*) Baiqi Ning~1 Libo Liu~1 Zhengui Wang~(1,2) 1.beijing National Observatory of Space Environment,Institute of Geology and Geophysics, chinese academy of sciences,beijing,10029 2.graduate university of chinese academy of sciences,beijing 100049, china

＜正＞Mesosphere and low thermosphere（MLT）,as an important coupling region in upper atmosphere,plays important roles in the dynamical processes as well as the transportation of energy and *** decades, to understand this complicated dynamical region,extensive wind observations have been conducted from the ground-based and space-based *** of observations have revealed a wealth of information on atmospheric tides,but they suffer from lack of global structure and local time coverage *** article proposes a technique to map the tidal winds in mesosphere and lower thermosphere（MLT） region from the observation of the meteor radar chain located along the 120°E meridional circle in china[*** et al,2004]. The observed zonal and meridional winds were first decomposed into mean,diurnal,semidiurnal and terdiurnal tidal components in the altitude range 82～94 km for stations at different latitudes（from 18.3°N to 40.3°N） in the

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