基准面

Based on the principles that the cyclic change of base level controls the formation and distribution of sequences and in combination with the comprehensive analyses of drilling, logging and seismic section, the Ordovician sequence stratigraphic framework in Tazhong area is established.

根据基准面旋回变化控制层序形成和展布的有关规律，并结合钻井、测井和地震等资料，综合分析建立了塔中地区奥陶系的层序地层格架，共包括5个三级层序。

Irregular surface severely distorts the primary reflections from subsurface. Traditional time shift static correction is valid only under the conditions of surface consistency. CFP-based redatuming from irregular surface provides a new way for solving this problem.

复杂地表条件严重影响了来自地下的反射信息，如果地表一致性的条件不能满足，常规的时移静校正就不再适用，基于共聚焦点技术的起伏地表基准面重建为解决此类问题提供了一种新的思路。

In the shape analysis of stress surface contour of 3D footprint, the consistency of datum plane cannot be strictly controlled, so a descriptor insensitive to perspective transform is needed.

在立体足迹的重压面边界围线的形状分类和识别中，由于不能严格控制基准面方向的一致性，必须采取对透视变换不敏感的描述方法。

According to feather element tree, the base level and base coordinate system are created, then we can choose them when we need them at any time.

根据特征元素树创建了基准面和基准坐标系，使我们很方便的在需要参照基准的时候来选取它。

Some authors proposed that the analyses of transfer cycles of high frequency base level and key surface correlation could be used to correlate isochronal strata.

在前人提出的高频基准面转换旋回分析和关键界面对比分析来确定等时性的基础上，以板中东油田板2油组水下冲积扇沉积为例，就湖盆内事件沉积的特点，提出可以结合洪泛面和事件沉积界面以及异旋回和自旋回来进行高分辨率层序地层的对比研究。

The surface subsidence in the Yellow River delta foreland area brings changes to the land surface height there, and the depth datum in the bathymetric survey is determined on the basis of the level of land bench mark, so the changes in the level of land bench mark will affect the determination of depth datum and the accuracy of bathymetric survey.

国家海洋局，第一海洋研究所，山东青岛 266061文章摘要：黄河三角洲前沿的陆地由于受地面沉降的影响，使地面高程不断发生变化。在水深测量中，深度基准面是根据陆地水准点高程确定的，陆地水准点高程的变化影响深度基准面的确定，从而影响水深测量的准确性。

Historically, datums have been based on ellipsoids that best represent the geoid within the region the datum is intended to map.

历史上，大地基准面一般基于与制图区域大地水准面最接近的地球椭球面构建。

Taking the demolition of a large sewage tank as an example, the design of blasting parameters, unit-area load, a reference-area for load and the principle of selecting total reference-area, the calculation of total load, charge structure, priming network and others are discussed.

以拆除一大型污水处理池为例，讨论了爆破参数的设计、单位面积装药量的确定、选取装药基准面和确定装药基准面总面积的原则、总装药量的计算，以及装药结构和起爆网路等；并简述了这种方法的爆破机理。

The geoid is used to be regarded as the theoretic global vertical reference .The actual national height references are regional mean sea levels determined by tide gauge station. The difference between them is apparent. The satellite altimetry has developed as a kind of important space geodetic technique since 1970s.

大地水准面作为全球高程测量的理论基准面，在现实工作中，国家或者地区高程系统的起算面是利用验潮方法来确定局部平均海平面的，两者之间的差距是显而易见的。

Mercator is the type of projection you see used on Live maps and Google maps, but as many often mistakenly thinks, they do NOT use WGS84 for the projected map, although WGS84 is used when you directly input longitude/latitude values using their API.

Live Map和Google Map都使用墨卡托投影，但并不像人们认为的那样他们使用WGS84基准面，虽然你在他们的API中输入的值是WGS84下的值。【译注：原因是WGS84基准面是基于椭球面的，而LiveMap和GoogleMap使用的是球面。另外，YahooMap使用的是等距圆柱投影。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。