参考点

All AMDB features must be located within 20 km of the Aerodrome Reference Point.

所有的可用性管理数据库的使用，必须设在机场参考点20km 以内。

A fixed reference point on the concave side of a conic section.

圆锥截面凹面的固定参考点。

The method will make a break in the theory of earth-space location; achieve space-space location .

与第一种方法相比，该方法有如下优点：(1)不需要在星载SAR的视场中使用任何位置确知的参考点，因此将真正突破现存的地-空定位理论，达到空-空定位水平；(2)其定位精度将仅仅取决于星历数据的准确性、地球模型的有效性、脉冲时延所决定的目标斜距精度、以及成像中多普勒信息的估计精度。

This is the most convenient reference level for most electrostatic problems.

对大多数的静电问题来说，这是最方便的参考点。

The result of benefit evaluations indicator system show that the seven location built by ecological engineering will help to distinguish the integration of local ecological network and irrigated ecological systems. The biomass, IBI index and results of ecological efficiency assessment are best of Yongcyuan waterway and in Taitung and Kolin Yongcyuan waterway in Yiland for irrigation canals and drainage canals respectively. Thus, the results can be an reference point of other locations selecting in future, benefit evaluating, design and construction.

效益评估方法评估结果发现七个实施生态工程建设地点皆有助於区域生态网络及基地生态体系完整度之提升，而圳路类以台东涌水圳、大排类以宜兰柯林涌泉圳的生物量、IBI指数、生态效益评估结果最佳，可作为后续其他工程地点选址、规划设计施工、效益评估之参考点。

Each ball image is a reference point in time and space.

球的每个图像都是时间和空间上的一个参考点。

A reference point of the objective value considered is introduced in the algorithm and it is generated in each iteration step to adapt to decision maker's information, which makes the solution space compressed.

该算法引入目标参考点，在算法的每一次交互步骤中，让决策者通过调整目标参考点来寻找满意解，并压缩了目标搜索空间。

To exam the validity of the Bloch-Grüneisen formula at megabar pressures, we use the electrical conductivity data point of ε-iron at relatively low pressure (～40GPa) reported by Keeler as a reference point, a formula for calculating the conductivity of the ε-iron under high-pressure and temperature was deduced via Bloch-Grüneisen,where v is specific volume , T is temperature and σ is electrical conductivity .

为了检验Bloch-Grüneisen公式在兆巴压力冲击压缩下的有效性，本文取Keeler在较低压力下ε相区的一个电导率数据作为参考点，得到了Bloch-Grüneisen公式关于ε-铁在高温高压下电导率的一个解析表达式：σ=〓，这里，比容v的单位是cm〓/g，温度T的单位是K，电导率σ的单位是Ω〓cm〓。

So considering uncertainty variety of spatial data because of it, this paper introduces centriod as a reference point, and expanded uncertainty parameter changed with variable scales in 16-direction relation cone-shaped model and describes them with formalization. The model partitions the direction relations with smooth transition regions, which accord with percipience on direction concept description.

本文考虑了由此带来的空间数据不确定性变化，用质心作为参考点，并在16方向模型中添加了不确定度的参数，来适应尺度变化引起的空间关系的变化，并对其进行形式化描述，以更好的描述空间关系，使得方向关系的划分上有个平滑的过渡区，在方向概念的表达上更符合人的认知。

After setting your first reference point, use the other path operations which both update the reference point and connect to it in some way.

在设置第一个参考点后，以相同的方式，使用其他路径更新参考点和连接操作设置新的参考点。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。