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- variable density filter 可变密度滤光片
- variable density filtering 可变密度滤过
- The inviscid linear stability of variable density swirling jets is analyzed by normal mode method. 用正则模方法研究了变密度无粘旋拧射流线性稳定性特征。
- By means of the multidisciplinary analysis of acoustic variable density logging data and dynamic/static data of oil fie. 声波-变密度测井主要应用于检查新井固井质量,为新井投产提供资料。
- The status for acoustic variable density log in Daqing Oilfield is introduced including applied techniques and logging tool levels. 介绍了大庆油田声波变密度测井的现状、应用的技术和仪器的水平。
- M2B tools acoustic amplitude and variable density signals become distortional in large boreholes, slow formation such as coal beds, and so on. 但该仪器在大井眼、煤层等慢速地层、低密度固井井段,声幅及变密度曲线有失真现象。
- It has multiple interfaces matching with CSU,and it can realize electrode array measurement,perforation coring,acoustic variable density logging,and so on. 该系统采用微型计算机和高速处理技术 ,应用计算机自动控制理论 ,设计了多道与CSU仪器配接的端口 ,能实现电极系测量、射孔取芯、声波变密度、连斜测量等多项功能。
- By variable density method, an optimal topology model is established with the help of the software ANSYS to support the optimal topology design of the horsehead pumping unit. 文章应用有限元分析软件ANSYS,采用变密度法建立拓扑优化模型,对抽油机驴头进行拓扑优化设计。
- This work refers to as the thermally compressible flow, the variable density flow due to temperature variation, with dimentionless heating number to describe its compressibility. 本文把由温度引起密度变化的运动流体称为热可压流，并由无因次加热数来度量其压缩程度。
- The section density model wasessablished with the help of variable density horizontal trapezoid body,ac th6 calculated theoretical anomalies are coincideal with the measured Bouguer gravity anomalies. 根据剖面密度模型，可以合理地解释布格重力异常。
- Linear gradient neutral density filter 线性变密度中性滤光片
- A New Method for Variable Density Log 实现变密度测井的一种新方法
- Combined with density filtering technique to improve the smoothness of density field, the mesh-dependence phenomenon is overcome. 采用密度过滤技术进一步提高密度场的连续性和光滑性，从而消除了网格依赖性现象。
- Variable Density Analysis of Frost Process 结霜过程的变密度分析
- variable density thin light pipe 可变密度薄光导
- variable density groundwater flow 变密度水流
- Unsafe filters include color film, some non-silver black and white film, medical x-ray films with images on them, smoked glass, photographic neutral density filters and polarizing filters. 任何彩色负片、不含银的黑白负片、被烟熏黑的或用墨汁涂黑玻璃片、太阳眼镜、拍摄用中性减光滤镜、偏振镜、磁盘、光盘等，都是不安全的，肉眼看不见的光线（比如红外线）可能大量穿透这些物品，长时间观看会对眼睛造成很大伤害，因此请不要使用这些替代品进行观日。专业的日食观测镜请到专业可信赖的机构购买。
- Identifying micro-rings through acoustic variable density logging 用声波变密度测井识别微环的存在
- A constant, variable, function name, or expression. 一种常数、变量、函数名或表达式。
- The prices are variable, shop around by all means. 价格高低不一，所以一定要货比三家逐店选购。
