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- The mathematics required for more sophisticated treatment of downward continuation is beyond the level of this book. 对于向下延拓更完善的论述所需要的数学已越出本书的范围。
- Aeromagnetic data downward continuation to sea level instead of marine magnetic survey data can improve use capability of survey data. 采用航磁数据向下延拓到海面代替船测数据,可提高磁力测量成果的综合利用率。
- A preliminary simulation experiment supports the "fictitious compress recovery" approach and the "downward continuation" approach is given in this paper. 初步的模拟实验检验支持虚拟压缩恢复法以及由此而引申出的“向下延拓”法。
- Based on high order generalized screen propagator, we used the method of "wave field downward continuation" to realize prestack depth migration from irregular topography. 基于高阶广义屏算子，应用直接下延法，实现了起伏地表条件下的高阶广义屏算子深度偏移。
- fictitious downward continuation 虚拟向下延拓
- fictitious downward continuation of gravity field 重力场的虚拟向下延拓
- downward continuation of potential field 位场向下延拓
- Potential field downward continuation 位场向下延拓
- downward continuation problem of the gravity field 重力场向下延拓问题
- The downward continuations are made by the iteration method and the FFT for a model and practical data, respectively.The effect of the iteration method is much better than the FFT. 本文用迭代法对模型数据和实际数据进行向下延拓，对比了迭代法与常规的FFT法在位场向下延拓中的效果，迭代法显著优于FFT法。
- She laid the picture face downward on the table. 她把那幅画正面朝下放在桌上。
- DISCRETIZATION SCHEMES USED IN DOWNWARD CONTINUATION OF GRAVITY 用于重力向下延拓的离散化方法
- A downward tendency, as in the price of a stock. 下降趋势如股票价格等的下降趋势
- Prices started a downward plunge. 价格开始猛跌。
- This road is a continuation of the motorway. 这条公路是高速公路的延伸。
- DOWNWARD CONTINUATION OF AEROMAGNETIC ANOMALY FROM FLYING ALTITUDE TO TERRAIN 将航磁异常从飞行高度向下延拓至地形线
- He looked downward to avoid my eyes. 他低著头看,以避开我的目光。
- A downward incline or passage; a slope. 斜面，斜坡向下的斜面; 倾斜面
- Projecting downward; overhanging. 向下突出的; 悬伸在外的
- He argued for a continuation of the search. 他主张继续搜查。
