geoid

简明释义

英[ˈdʒiːɔɪd]美[ˈdʒiːɔɪd]

n. 大地水准面

英英释义

单词用法

同义词

反义词

例句

1.The altimetry geoid undulation is mainly conducted by convergence between two or three plates, and its components at short wavelength characterize tectonics within basins.

测高大地水准面反映了研究区板块相互作用的特点，其高频成分可以刻画各海盆的构造特征。

2.The volcanic eruptions are correlated with geoid, the positive geoid anomaly can build up high normal stress, which is in favor of huge eruptions.

火山喷发活动还与当地的重力势有关，重力势正异常可能与高的正压力有关，有利于产生特大喷发。

3.This paper introduces statistical learning theory and support vector machine, proposes a new method, support vector machine technology, to simulate quasi-geoid.

介绍统计学习理论和支持向量机，提出利用支持向量机技术进行似大地水准面拟合。

4.Which coincide with the mean sea level surface is the geoid.

其中与平均海平面重合的面就是大地水准面。

5.The symmetry of the planetary relief is broken in the western Pacific where the geoid surface is uplifted.

在西太平洋中，星球地势起伏的对称受到破坏，那里的地球体表面受到抬升。

6.The maximum difference of geoid undulation between the model and EGM96(to 70 degrees) is 2.

该模型与EGM96相比（70阶次），大地水准面起伏差异最大为2。

7.The main purpose of physical geodesy is to ascertain the outer Earth gravity field and geoid.

物理大地测量的主要目标是确定地球外部重力场和大地水准面。

8.The shape of the Earth is often approximated as a geoid, which reflects sea level variations.

地球的形状通常被近似为一个地球模型，它反映了海平面的变化。

9.In geodesy, the geoid is used to define the zero reference surface for elevation measurements.

在大地测量学中，地球模型用于定义高程测量的零参考面。

10.Satellite data can help in calculating the precise shape of the geoid over different regions.

卫星数据可以帮助计算不同区域的地球模型的精确形状。

11.Understanding the geoid is crucial for accurate GPS positioning.

理解地球模型对于准确的GPS定位至关重要。

12.The concept of the geoid allows scientists to study variations in Earth's gravitational field.

地球模型的概念使科学家能够研究地球重力场的变化。

作文

The term geoid refers to a model of Earth's shape that is based on mean sea level and the gravitational field of the planet. It is a crucial concept in geodesy, which is the science of measuring and understanding the Earth's geometric shape, orientation in space, and gravity field. The geoid provides a reference surface from which elevations can be measured, making it essential for various applications such as mapping, navigation, and construction. Understanding the geoid is vital because it helps scientists and engineers accurately determine how high or low a point is above or below this reference surface. Unlike a simple geometric shape like a sphere or an ellipsoid, the geoid is irregular due to variations in Earth's gravitational pull caused by factors such as mountains, valleys, and the distribution of mass within the Earth. This means that the geoid is not perfectly smooth but rather fluctuates in height, reflecting the complexities of our planet's structure. In practical terms, when surveying land or constructing buildings, engineers must take into account the local geoid to ensure that their measurements are accurate. For instance, if a surveyor measures the height of a mountain, they need to know how that height relates to the geoid to determine its elevation above sea level. This relationship is critical for creating accurate topographic maps, which are used for everything from urban planning to environmental conservation. Moreover, the geoid plays a significant role in satellite navigation systems. Global Positioning System (GPS) technology relies on precise measurements of distances from satellites to receivers on Earth. To provide users with accurate location data, GPS systems must incorporate the geoid into their calculations. This ensures that the elevation data provided to users reflects true heights above the geoid, rather than just raw measurements that could be misleading. In addition to its practical applications, the study of the geoid also contributes to our understanding of Earth’s internal processes. By analyzing the geoid, scientists can infer information about the distribution of mass within the Earth, including the presence of tectonic plates and volcanic activity. This information is invaluable for predicting geological events such as earthquakes and volcanic eruptions, thereby enhancing public safety. In conclusion, the concept of the geoid is fundamental to many fields, including geodesy, engineering, and environmental science. Its intricate relationship with Earth's gravitational field makes it a complex yet essential model for understanding our planet. As technology advances, the methods for measuring and utilizing the geoid continue to improve, leading to more accurate representations of Earth's surface and better tools for managing our natural resources and infrastructure. Understanding the geoid is not just an academic exercise; it has real-world implications that affect how we navigate, build, and protect our environment.

术语geoid指的是基于平均海平面和地球引力场的地球形状模型。这是大地测量学中的一个关键概念，大地测量学是测量和理解地球几何形状、空间方向和重力场的科学。geoid提供了一个参考面，从中可以测量高度，这使得它在制图、导航和建筑等各种应用中至关重要。 理解geoid是非常重要的，因为它帮助科学家和工程师准确确定某个点相对于这一参考面的高度或深度。与简单的几何形状如球体或椭球体不同，geoid由于山脉、山谷和地球内部物质分布等因素造成的地球引力变化而不规则。这意味着geoid并不是完全光滑的，而是由于我们星球结构的复杂性而在高度上波动。 在实际应用中，当进行土地测量或建筑施工时，工程师必须考虑当地的geoid以确保他们的测量是准确的。例如，如果测量员测量一座山的高度，他们需要知道该高度与geoid的关系，以确定其相对于海平面的高度。这种关系对于创建精确的地形图至关重要，地形图用于城市规划到环境保护等各个方面。 此外，geoid在卫星导航系统中也发挥着重要作用。全球定位系统（GPS）技术依赖于从卫星到地球接收器的精确距离测量。为了向用户提供准确的位置数据，GPS系统必须将geoid纳入其计算中。这确保了提供给用户的高度数据反映了相对于geoid的真实高度，而不仅仅是可能误导的原始测量。 除了实际应用外，geoid的研究还促进了我们对地球内部过程的理解。通过分析geoid，科学家可以推断出有关地球内部质量分布的信息，包括构造板块和火山活动的存在。这些信息对于预测地质事件如地震和火山喷发是无价的，从而增强公众安全。 总之，geoid的概念对许多领域至关重要，包括大地测量学、工程学和环境科学。它与地球引力场的复杂关系使其成为理解我们星球的复杂但必不可少的模型。随着技术的进步，测量和利用geoid的方法不断改进，导致对地球表面的更准确表示，以及更好的管理自然资源和基础设施的工具。理解geoid不仅仅是学术练习；它具有影响我们如何导航、建设和保护环境的现实意义。