| 1. | Unfortunately , up to now , there is no an efficient algorithm to deal with the iterative reconstruction algorithm , especially from fan - scanned projections
对于迭代重建，目前尚无很好地解决该问题的算法，特别是对扇束投影重建问题。 |
| 2. | Reconstruction via iteration is used for fault data recovery in this thesis . iterative reconstruction is a process of sliding the measure to pcs along the direction of fault
本文采用了迭代重构法进行数据恢复，迭代重构就是沿着故障方向，逐步逼近主成分子空间的过程。 |
| 3. | We performed crosswell tomography on a real crosswell seismic line from shengli oilfield by using simultaneous iterative reconstruction technique ( sirt ) based on shortest path tree ( spt ) curved ray tracing
摘要利用基于最短路径树弯曲射线追踪的联合迭代重建层析成像( sirt )技术进行井间地震层析成像，对胜利油田的一对井间实际资料进行了处理。 |
| 4. | For this method , the matrix inversion and iterative reconstruction are selected based on the quantity and quality of data , and then the physical model and the actually measured data are processed by using this method
层析成像算法根据数据量大小、品质来选择矩阵反演法与迭代重建法，然后对物理模型、实测资料进行层析成像处理，结果获得满意的重建异常体图像。 |
| 5. | The paper focuses on the art ' s capability when it comes to reconstruction with incomplete and noisy projection data . iterative reconstruction method is an important kind of reconstruction methods , which has superior advantages when reconstructing images with incomplete and noisy projection data
迭代法是图像重建算法中的一大重要类别，尤其是在处理投影数据不完全及噪声干扰较为严重的情况下具有不可代替的优势。 |
| 6. | The authors established an initial velocity model based on the first break time of the actual data , then realized the forward calculation with the improved shortest path ray tracing algorithm , and applied the improved constrained damped simultaneous iterative reconstruction technique ( cdsirt ) to solve large - scale and sparse equations for inversing the near - surface velocity field
根据实际地震数据的初至波时间建立初始速度模型；采用改进的最短路径射线追踪算法进行正演；利用改进的约束带阻尼联合迭代重建技术( cdsirt )求解大型、稀疏的方程组来反演近地表的速度场。 |
