根据中国第一次土壤普查得到的土壤各类型分布面积、采样数据、土壤有机质含量，运用GIS技术，来估算土壤碳库。
This paper adopted the soil distribution area, sampling data and soil organic content from the first soil general survey and applied the technique of GIS to estimate soil carbon reservior in China.
使用循环采样设计方案，对海北沼泽化湿地生态系统涡度相关通量观测塔的通量贡献区内叶面积指数进行了实地调查。
Cyclic sampling design was used to investigate leaf area index(LAI)in flux contributing source of eddy covariance flux tower swamp ecosystems of Haibei.
以全面采样取代了几处小面积的对照取样：压实采样精确度可达100%。
Comprehensive sampling instead of several small control samples: 100% of the specimen compacted.
采样周期内实际收割面积计算误差造成的产量数据误差是联合收割机计产数据中的一种常见误差。
Harvested area error of yield point is one of the main reasons to bring yield error in yield data collected by yield monitoring system.
通过在一定的范围内人为改变低流量适配器三通旁支管的断面面积来改变采样流量，从而满足对酯类、腈类等气体采样规范的要求。
Through needle valve can change the tee cross-sectional of low-flow adapter, thus changing the sample flow, and thus able to meet the requirements of toxicology sampling norms.
线采样系统提出以线状样区代替以往成数抽样中的点样区与面积样区概念，通过统计线状样区内作物种植面积成数来反映区域总体农作物种植面积成数。
The GVG system is a new solution, with the conception of sampling lineage instead of the traditional sampling point or sampling area, to extracting crop acreage information.
此算法的关键不同点在于不是让算法结果在采样点的值等于原采样值，而是在一个象素大小的单位面积上得到的平均值等于原采样值。
A key difference is that this algorithm does not give the same value at the sampling point but gives the same average value in unit area of each pixel.
能量不闭合的原因主要是涡度相关仪器与辐射表测定的 源面积之间的差异导致的采样误差，以及忽略了水平对流产生的影响。
The main reasons which resulted in the imbalance of EBC were the advection ignored and the difference of footprint between turbulent energy measurement and available energy measurement.
然后用三次样条法拟合剖面边缘曲线并插值采样，把立体树冠分解成许多微小的切片分别求体积和表面积，依次累加就得到所需结果。
These data are fit with method of spline and resampled to divide crown into many small slices, whose volume and surface add up to the result.
为较完整地反映长江口和黄河口沉积物的磁性特征，对两大河口所覆盖的区域进行大面积布点采样。
To reflect magnetic properties of the sediments from the Changjiang and Huanghe fully, surface sediments were collected from the river channels and higher tidal flat of the estuaries.
为较完整地反映长江口和黄河口沉积物的磁性特征，对两大河口所覆盖的区域进行大面积布点采样。
To reflect magnetic properties of the sediments from the Changjiang and Huanghe fully, surface sediments were collected from the river channels and higher tidal flat of the estuaries.
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