查询词典 stand on

The map is compiled by some of the mathmatical models that is established according to the quantiative relations between the stand density of slash pine and the different factors of tree measuration, on the basis of data of 220 plots of slash pine in Guangdong, and the law of stand density effect.

用全省范围内调查所得的220块标准地作为编图、检验材料，以林分密度效应规律为基础，根据湿地松林分密度与林分各测树因子之间的数量关系，建立各种数学模型，编制出广东省湿地松人工林密度管理图。

Our products line includes different crowd control barrier,sign stand,umbrella packing machine,banner stand and so on.

我们的产品线包括不同人群的屏障，签订立场、雨伞包装机、旗帜站等。

The result showed that the content of soil carbon indices on slope cropland were lower and increased dramatically in linear pattern after the cropland were abandoned for some time. 50 years after abandonment, OC, AOC and NAOC would increase by 169%, 144% and 210% respectively, compared to the slope cropland and would be 35 %, 39 % and 33 % respectively, of t he natural Chinese arborvitae stand. The carbon pool index and carbon pool management index would sharply increased by 169% and 117%, comapared to the slope cropland would increase by 35% and 42% respectively, compared to natural Chinese arborvitae stand.

结果表明：侵蚀环境的坡耕地土壤碳库各组分含量较低，土壤碳库处于高速低效率运转；撂荒后可以显著增加土壤碳库各组分含量，并随恢复年限呈显著线性关系，50 a时，TOC、LOC和NLOC分别较坡耕地增加169%、144%和201%，为侧柏林的35%、39%和33%；碳库指数和碳库管理指数较坡耕地明显增加，增幅分别达到169%和117%，仅为侧柏林的35%和42%。

According to stand biomass data of Cunninghamia lanceolata Hook measured in Minjiang watershed, based on the compatibility of models, the relations of each component were analyzed, and the stand biomass compatible models were established by using SPSS analysis software.

本研究根据闽江流域杉木林分的生物量实测数据，从模型相容性的定义出发，分析各分量的代数关系，利用SPSS统计分析软件构建了林分各分量的相容性模型。

Two relatively recent independent developments stand behind (stand behind:后援,做后盾) the current major research effort on nitrogen fixation, the process by which bacteria symbiotically render leguminous plants independent of nitrogen fertilizer.

两项相对近期且互为独立的事态发展激励了研究者目前对固氮作用进行重大的研究努力，而所谓固氮作用，是指细菌通过这一过程，以共生关系的手段，致使豆科植物独立于氮肥。

According to the analysis of features of the key outcrop sequence stratigraphy, build the sequence frame, through the section comparison, and the study of feature of the 5 key outcrops, then it can be concluded that, conglomerate on the denudation plane or the other contrastive sediment are the main features surrounding the bottom border of the sequence. In the foreland basin sediment environment, the transilient group of mud rock and sandstone are the main sediment features of low-stand system tract. Thick mud rock and sandstone interbedded is the chief component of transgressive system tract, sometimes together with thick turbidity current sandstone; High-stand system tract is composed by the combination of mud rock and sandstone interbedded, with the progradation as its main style. Maximum flooding surface Sediment are usually mudstone, and the thickness is different from each other.

依据关键露头剖面高精度层序特征分析，通过剖面对比建立高精度等时层序地层格架，通过对5条关键露头剖面的详细高精度层序特征分析，认识到：剥蚀面上的粗碎屑岩或与之可区域对比的其它沉积是层序底部边界附近的主要沉积特征；在盆地沉积环境中，砂泥岩发育，厚层、块状砂岩与泥质岩类的突变组合是低位体系域的主要沉积特征；湖进体系域以厚层泥岩夹砂岩为主，有时夹厚度较大的重力流砂体；高位体系域为砂泥互层沉积组合，以进积式叠加样式为主；最大湖泛面多为泥岩，但其厚薄不一。

The CVD is an important index to indicate tree diameterdifferentiating.On basis of dynamic change and tendency of CVDamong trees in stand,three models of square CVD are proposed.i.e.,basic model,stand factor model,and thinning effects model.All threemodels are of mechanism,asymptotic characteristic,and invariance forprojection length.Futhermore,there are compatiability and extremevalues in thinning effects model for thinned and unthinned stands.

直径变动系数是描述林木直径分化的重要指标，根据林木直径变动系数的动态变化和趋势，本文提出了直径变动系数平方动态变化的三个模型：基本模型，与林分因子相关的模型，考虑间伐效应的模型，上述三个模型均具有一定的机理性、渐近性和步长不变性，特别是考虑间伐效应的模型为间伐林分和未间伐林分的相容性模型，它还具有相容性和极值性。

The result pointed out that the vertical distribution of foliage for each species was different,however,generally speaking,the foliage in upper crown (0.3CL) for broad-leaved species in natural secondary forest took a small percentage,about 10%;in middle or middle lower of the crown(0.4CL to 0.8CL) the branches here took the majority percentage of whole foliage,almost 60%to 75%;but in lower crown(0.8CL),there was about 10%of whole foliage.(5)The interspecies competition of trees in secondary forest was expressed by Hegyi competitioin index,and the active competitor was calculated by the competition zone radius and the tree position,DBH,and distance in the zone,it was not all competitors in tranditional calculation.The study introduced crown area overlap index to describe the crown competition between subject tree and its competitors,furthermore,the crown area was classified into 5 levels with a method of equal crown projection area,therefor,the resulting crown area overlap index showed more realities of existing stand conditons.(6)Based on the theoretics of multiply divide,the spatial strcture optimizing model of secondary forest stand selective thinning was developed by diversity mingling,aggregation index,competition index and crown area overlap index,also designed 10 constraint conditions which were related to forestry meanings,the objective function was solved by the implicit enumeration method with LINGO 9.0,using 0-1 integer programming.

并且得出，每个树种在树冠内相对高度上的叶量的垂直分布是不同的，天然次生林阔叶树种的叶量在树冠的上部(0.3CL以下)所占比例很小，约占10%左右；在树冠的中部以及中下部(0.4CL～0.8CL)，叶量所占比例最大，几乎集中了整个树冠60%～75%的叶量；而在树冠的下部(0.8CL以下)，几乎占很少的叶量，大约10%左右。5、采用Hegyi竞争指数来表现次生林内林木的竞争关系，并且根据竞争圈的大小和林木在竞争圈内的分布位置、大小与距离来计算有效的竞争木，并不是传统意义上的全部竞争木；本研究提出用树冠叠加指数来表示林木与周围树木的树冠竞争情况，并采用等树冠投影面积法把树冠分为5级，这样计算的树冠叠加指数更加与现实林分相符。6、本研究基于乘除法的思想，用多样性混交度、聚集指数、竞争指数和树冠叠加指数构建了天然次生林择伐空间优化模型，设计了10个与林学意义相一致的约束条件，并采用0-1整数规划的思路，在LINGO9.0软件中使用了隐枚举法对目标函数求得最优解。7、以M702标准地为应用实例，具体计算出了每株采伐木，经过择伐后，目标函数值按模型设计的要求发生了极大的改变，增加了5倍多，说明了最后这个解的优良性，满足了设计的要求。

The stillness of the morning is impressive. The floor creaks under our feet as we move toward the window to look abroad through some clear space over the fields. We see the roofs stand under their snow burden. From the eaves and fences hang stalactites of snow, and in the yard stand stalagmites covering some concealed core. The tree and shrubs rear white arms to the sky on every side; and where were walls and fences, we see fantastic forms stretching in frolic gambols across the dusky landscape, as if Nature had strewn her fresh designs over the fields by night as models for man's art.

安静的早上总是令人难忘，我们踏着吱呀作响的地板走到窗前，站在一块无雪的地方来观望广阔的田野，我们看到屋顶都覆盖着皑皑白雪，屋檐和篱笆上挂满了冰棱，院子里的东西也被白雪覆盖了，像石笋一般，无从知晓里边究竟是什么，大树小树向四方伸展着它们洁白的枝丫；而在昏暗的大地上，院墙和篱笆以不可思议的形式向各处伸延，像是在愉快的跳跃，仿佛一夜的功夫，大自然就重新设计了一幅美景，供人类来临摹。

We see the roofs stand under their snow burden. From the eaves and fences hang stalactites of snow, and in the yard stand stalagmites covering some concealed core. The trees and shrubs rear white arms to the sky on every side; and where were walls and fences, we see fantastic forms stretching in folic gambols across the dusky landscape, as if Nature had strewn her fresh designs over the fields by the night as models for man's art.

我们的视线穿过空旷的地带向田野眺望：一幢幢房屋全是白雪盖顶；屋檐下，篱笆上挂满了钟乳石般的冰柱；院子里立着石笋似的雪桩，里面藏着什么，我们不得而知；大树小树向四面八方伸出白色的手臂，指向天空；墙壁和篱笆在黎明的景色中呈现出欢蹦乱跳的奇异形态，仿佛大自然一夜之间重新设计了田野风景，好让人间的画师临摹。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。