The orbits of planets in the once popular geocentric Ptolemaic system are epitrochoids.

Exploration geochemistry is faced with the problem of development in the 21 st Century.

摘要21世纪勘查地球化学面临发展问题.

Organic geochemistry is the study of the origin, transformation, and fate of life-derived matter on Earth.

有机地球化学是用来研究地球上与生命起源有关的物质的产生 、 变化和命运的学科.

Analytical quality control is essential in geochemistry.

在地球化学中,分析质量的控制至关重要.

Petroleum geochemistry is one of support subjects for petroleum exploration and development.

油气地球化学是油气勘探开发的重要支撑学科之一.

Deep-penetrating geochemistry concepts and methods have been developed for exploration of concealed ore deposits.

为了寻找隐伏矿床,近些年提出了深穿透地球化学的概念和发展了深穿透地球化学方法.

It is established on the theory of element geochemistry and the outdoor electrical extraction technique.

它是指通过物理化学手段来发现后生地球化学异常的找矿方法.

Its petrology , petrochemistry and geochemistry feature show the intrusive is post-collision and strongly-peraluminous granite.

岩石学 、 岩石化学、地球化学特征反映该岩体属后碰撞强过铝花岗岩.

Rare earth element pattern is a important way of study on REE geochemistry.

稀土元素模式图是稀土元素,地球化学研究的重要途径.

According to analysis of sedimentary characters and geochemistry characters of Luanchuan Group of New Proterozoic Era.

通过对新元古代栾川群地层沉积特征及地球化学特征分析,栾川群形成于被动大陆边缘构造环境.

This paper studied the geochronology of sandstone-type uranium deposit in the Dongsheng area of Ordos Basin.

文章研究了鄂尔多斯盆地东胜地区砂岩型铀矿成矿年代学特征.

The same, salt-saturated fluids could have filled up the Spanish geode, which lies near the coast.

同样, 饱和食盐水能够填满位于海岸边的西班牙晶洞.

The Geodesic Dome —— the House of the Future?

可测量的圆屋顶——未来的房屋?

In particular, it gives a characterization of closed totally geodesic hypersurfaces in such an ambient space.

特别地, 得到了这类流形中闭全测地超曲面的一个刻画.

By giving the definitions of geodesic main torsion and torsion line, discussing their some properties.

给出了测地主挠率和挠率线的定义, 讨论了测地主挠率和挠率线的一些性质.

From the property of geodesic curve , a new arithmetic of cutting line is put forward.

从测地线的性质出发, 提出了一种新的裁剪线生成算法.

The Very-Long-Baseline Interferometry ( VLBI ) is one of the most powerful techniques for astronomy and geodesy.

甚长基线干涉测量 ( VLBI ) 是天文学和测地学研究中的重要观测技术之一.

Under this method can solve the robust estimation of ill-posed problems in geodesy.

这种方法可以用于解决大地测量中的不适定性问题.

Gives the infimum of the numbers of dege in 2-connected nontrivial geodetic graph; Renew some results.

给出了 非 平凡二连通测地图边数的下确界; 改进了部分结果.

Ill-conditioned problems are widely existed in geodetic surveying.

在大地测量中,病态问题是广泛存在的.

G is geodetic if every pair of vertices is connected by a unique shortest arc.

如果图G上 的任意两点都有唯一的最短路相连,则我们称图G是测地图.