查询词典 density distribution

The particle velocity distribution in slugging is analyzed, which shows a nearly Maxwellian distribution despite strong heterogeneity in density.

更大规模上鼓泡的模拟虽受计算量的制约，但能观察到它从均匀初态的产生和发展过程，并与实际定性相符。

In this paper, nanopowders of rare earth oxides and tungsten were prepared and 0-3 type nano-composit rare earth tungsten thermionic emission materials were fabricated with novel technics. The raw material selection, preparation technic parameter, structure, physical and chemical characteristic, the rare earth distribution and the emission behavior were studied. The influence between the active layer and the thermionic emission performance, rare earth elements diffusion and distribution along depth were investigated in detail. The surplus RE formation and the electron transfer were discussed in theoretically. The thermionic emission current density of the single surplus RE on the active layer was educed. We adopted "liquid-liquid mixing, freeze-drying and two stage-reduction" working step firstly to produce the RE-W nanopowders including La-W powder, Ce-W powder and Y-W powder.

本文采用细化显微组织的新工艺，制备了纳米稀土钨粉末和0-3型纳米复合稀土钨热电子发射材料，探讨研究其原料选择、制备工艺及参数、结构特征、物理和化学特性、稀土分布均匀性、以及热电子发射特性；系统研究了稀土元素的高温扩散情况、高温状态下活性层中稀土的纵向深度分布、以及表面活性物质和活性层厚度对热发射性能的作用；从理论上分析阐释了超额稀土的形成及其电子的传递过程；并从理论上推导了活性层中单个超额稀土的热电子发射电流密度。

The spatial distribution of effective root density for Black locust is different from that of Arborvitae,butthe regularity of vertical distribution is same.

在垂直方向上，两树种吸收性根系主要分布在距地表0-30cm内。

In order to determine organic storage and its space distribution characteristics in paddy field of region, on the basis of second soil survey database, the space databases in unit of soil local type were set up by adoption Arcview software, integrated with GIS software, basined on soil type methods and region scale, the distribution of soil organic carbon storages in purple paddy soil of Chongqing were investigated. The results showed that the storage of SOC in Banan district of Chongqing was 6.48×10^6 t and average SOC density in Banan district with 8.31 kg/m^2 was higher than that of China.

为了明确区域稻田土壤碳库蓄积量及其空间分布特征，以全国第二次土壤普查数据资料为基础，运用地理信息系统软件Arcview建立研究区以土种为单位的空间数据库，结合GIS空间分析功能，基于土壤类型法估算重庆市巴南区稻田土壤有机碳储量及其空间分布特征，结果表明：研究区稻田土壤有机碳总储量约为6.48×10^6t，平均土壤有机碳密度为8.31kg/平方公尺，略高于全国平均水平。

We extracted data about environmental factors of 90 Chinese Chiroptera species at known distribution points by using GIS,and conducted PCA and stepwise regression analyses to evaluate impacts of these environmental factors on geographical distribution and species density of Chinese Chiroptera.

利用地理信息系统提取了中国翼手目90个物种已知地理分布点的环境因子数据，并利用主成分分析和逐步回归分析研究了这些环境因子对中国翼手目动物地理分布和种数密度分布的影响程度。

When picking information.those factors should be taken into consideration.(1)The kinds of rock and its distribution,(2)Geomorphy and slope class,(3)The landcover calss and grading,(4)The landuse class,(5)The townand city distribution and population density,(6)Hydrologic condition and rainfall.

信息采集时必须考虑的主导因子有：（1）岩石类型及空间分布；（2）地貌类型及坡度等级；（3）植被覆盖类型及等级；（4）土地利用类型；（5）区域城镇分布及人口密度；（6）水文条件、降雨量。

The distribution density of oil cells, the distribution types of oil cells and mucilage cells and their localization in the mesophyll are of some taxonomic value at the specific level in the Lauraceae.

油细胞的分布密度、油细胞与粘液细胞是否共存、是否单独存在或无，以及其具体分布部位等方面在种间存在一定的差异，这对于属以下等级的区分具有一定意义。

We found, GLP-1-IR cells in various guts of rat, pig and foetus of human with distribution scatteredly among the basal portion of intestinal glands. The cell shape corresponded with open type cells, i.e. L-cells. The density of GLP-1-IR cells was different in races, but the distribution regularity of GLP-1-IR cells was same. It showed that a continuous increase from the proximal to the distal portion of small and bowel.

结果发现：在各段肠管都可见到GLP-1-IR细胞；GLP-1-IR细胞散在于肠腺的柱状上皮细胞之间，多位于肠腺的基底部，呈开放型内分泌细胞形态，即L细胞；不同种属问GLP-1-IR细胞密度不同，但分布规律相同，即自小肠和大肠的近端向远端逐渐增大。

The results showed that small-scale gaps were the predominant types of disturbance. The average gap density was 12.5 km^(-1). The distribution pattern of gaps was aggregated on south facing slopes and was approximately homogeneous on north facing slopes. Conifer trees were the primary gap-makers in this forest that was dominated by Abies faxoniana, Tsuga chinensis, Betida utilis, both in abundance and diameter rank. The decay class distribution of gap-makers indicated that the mode of gap formation and gap-maker species changed with age of the forest; the contribution of conifer species to gap formation decreased with time and broadleaf species increased.

结果表明：l本区以小型林隙干扰为主，林隙平均密度为12.5个km^(-1)，林隙的分布格局在阳坡和山脊为集聚分布，阴坡近均匀分布；林隙形成木以针叶树为主，岷江冷杉、铁杉和糙皮桦在形成木的数量和径级组成上均居前列。2林隙形成木的腐烂等级分布揭示出林隙形成木的形成方式和种类组成均随时间变化。

It can be seen that mercury contents in sulfides of the density fractions are different from each other in the same coal, which implied that mercury is distributed in sulfide unhomogeneously. The reasons of the unhomogeneity of mercury distribution in sulfide may be that mercury exist in sulfide in form of submicrometer size individual mineral such as cinnabar, and not in form of solid solution in pyrite, or that in coal, there are multi-stage and multi-origin sulfides among which the distribution and modes of mercury are different from each other.

这种差异性说明煤中黄铁矿中汞的分布是不均匀的，这表明：汞在黄铁矿中可能不是以固溶体形式存在，而可能是以细小的呈机械包裹物的独立矿物形式赋存于黄铁矿中；或者煤中存在多期、多成因的黄铁矿，不同期次成因的黄铁矿间汞的分布和赋存状态具有差异性。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。