This paper offer the algebra ray method to preserve protective coal pillar.
本文采用代数射线法留设保护煤柱。
A new ray-tracing method - total iterative ray-tracing method in random interface is studied.
研究了一种适用于任意界面下射线追踪的新方法——整体迭代射线追踪法。
Therefore, constantly improving the ray-tracing method has always been the human's studied hot spot.
所以不断改进射线追踪方法一直是人们的研究热点。
Natural gamma ray spectral log is a new type of well logging method.
自然伽马能谱测井是一种新的测井方法。
So we have to find a better way based on ray tracing method.
因此需要寻找合适的射线追踪方法。
The X-ray phase analysis without standards is an important quantitative method.
无标样法是X射线定量分析的重要方法。
Conclusions the X-ray film exam is an important method for straight back syndrome.
结论X线胸片检查对直背综合征的检查有重要意义。
The crystal structure was determined by X-ray diffraction method.
用X射线单晶衍射仪测定了它的晶体结构。
The crystal structure was determined by X-ray diffraction method.
用X射线单晶衍射仪测定了它的晶体结构。
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