1) dark focus
暗焦点
1.
Practical application of laser optometer for dark focus;
暗焦点检查仪的实际应用
2) dark spot
暗点
1.
The results indicate the reservoir characteristics and physical property of T1f1-2 is better,its reflection coefficient is bigger than T1f3,and the characteristics of bright spots and dark spots are obvious in Puguang Gasfield.
通过对飞仙关组气藏的岩石学特征、地震反射系数变化特征以及地震响应特征等方面的研究,分析认为飞仙关组一、二段(T1f1-2)储集层物性较好,其地震反射系数比飞三段(T1f3)变化大,"亮点"和"暗点"反射特征表现明显,通过运用地震反射特征进行气田井位部署,应用后取得了较好的效果。
3) dim spot
暗点
1.
As a result it has the typical seismic reflection characteristics of gas reservoir: 1) dim spot at top interface of gas reservoir, 2) bright spot at bottom interface of gas reservoir, 3) flat spot at gas-water contact, and 4) seismic response shape of gas reservoir.
二连盆地阿尔善背斜下白垩统腾格尔组中部的天然气藏埋深500m，属断背斜层状浅气藏，加之地表条件好，故在地震剖面上出现了典型的气藏地震反射特征，即：①气藏顶界面的暗点；②气藏底界面的亮点；③气水界面的平点；④气藏地震响应的外型。
2.
The seismic and geologic proof is concluded in this article,which can explain the dim spot existed at the deep Kekeya s E 2 k gas reservoir,from studying the acoustic impedance and the surface reflection coefficient of Kekeya gas-bearing carbonate rock.
通过对柯克亚含气碳酸盐岩波阻抗及界面反射系数的研究,取得了柯克亚深部E2k气藏暗点存在的地震地质依据。
3.
We built up a model to identify high efficiency payzones with high permeability by using dim spots of "weak chaotic reflection",and then identified two types of dim spots,i.
以三维三分量地震勘探资料为基础,通过高效储渗区储层测井及波阻抗特征、地震响应特征对比分析、模型正演验证等方法,建立"杂乱弱反射"地震暗点高效储渗区识别模式,划分出PP波/PS波"单弱"及"双弱"2种暗点类型,解剖了其地质及地球物理成因机理,提出"双弱"模式为最优类型。
4) Scotoma
[英][skə'təumə] [美][skə'tomə]
暗点
1.
Methods Central Scotoma and fixation nature were performed in the patients:20 cases with full-thickness macular hole,10 cases with lamellar macular hole and 10 cases with cystoid macular degeneration.
方法对20例全层黄斑裂孔和10例板层黄斑裂孔及10例囊样黄斑变性患者进行了中心暗点及固视性质检查。
5) scotoma
[英][skə'təumə] [美][skə'tomə]
暗点，盲点
6) focus to object-rotating-axis distance(FOD)
焦点焦距
补充资料：X线管的焦点
X线管的焦点
放射学术语。X线管内X线的发源点，即X线管阳极，接受电子撞击并产生X线的部位。X线管阳极的焦点并非为一个无限小的点，而是具有一定几何学的面积，故又称焦点面。由于X线管阳极靶面实际接受电子撞击的面积与其参与X线几何投影的有效面积不同，故焦点有实际焦点
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条