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forward computation
    Forward computation of high order derivative of gravity anomaly relating to complex geologic body
    复杂形体重力异常高阶导数的正演计算
    USE OF FORWARD COMPUTATION IN CONSTRUCTION OF BALANCED CROSS SECTION
    平衡剖面的正演计算及其应用
    Fast Algorithm for Forward Computation in Media with an Arbitrary Number of Planar Layers
    任意平面分层介质中正演计算的快速方法
    The forward computation of 2D geoelectric models are done on the Universe-68 micro-computer.
    针对实际计算中存在的困难,采取了一些必要措施,并在宇宙68微机上实现了二维模型的正演计算
    It is of interest for interpreting the thin-bedded AVO anomaly to calculate the equation of reflection coefficient in the solid multilayered medium as derived in the paper and based on which to write the reflection forward computation program.
    文中推导的固体多层介质情况下计算反射系数的公式及据此编制的反射波正演计算程序对于薄层AVO异常的解释是有意义的。
    In forward computation for seismic waves, subsurface media arc usually assumed to be completely clastic or acoustic.
    在地震波正演计算中,常假设地下介质是各向同性的理想弹性介质或声学介质,而实际介质通常是各向异性和非完全弹性的。
    The article also describes how we distinguish thephenomena of these problems, design crosshole model for forward computation,analyse their generation mechanisms quantitatively and qualitatively,and take somesatisfactory measures for coping with them so as to improve the effect of tomogra-phy.
    文中展示了这些问题的现象,并设计了井间模型进行正演计算,从理论上定量或定性地分析其形成机制,提出相应的改正方法和对策,旨在提高层析成像的效果。
    The method takes two essentia1 measures:. Improve the forward computation accuracy by making steep-dip approximation of the diffraction term equation.
    该方法中主要采用两点措施:①通过衍射项方程的陡倾角近似,提高正演计算的精度;
    This algorithmhas the advantages of both these methods, results in quite high computation accura-cy and efficiency, and applies to the forward computation of elastic wave field.
    该方法结合了有限元法和虚谱法的优点,具有较高的精度和计算效率,适用于弹性波场的正演计算
    Its basic idea is that the model space is quantified into finite model sets, then select a most prospective model according to a certain searching tactics to perform forward computation, compare the forward results with the observed data and compute the objective function; if the function value is less than a given value, then the model is the inversion result, and if not, continue searching, forward com-putation and comparing repeatedly until a satisfactory solution estimate is found.
    其基本思想是把模型空间量化成有限模型集,而后按一定的搜索策略选择一个最有希望的模型进行正演计算,再把正演结果与观测数据比较并计算目标函数,如果目标函数小于给定值,则此时的模型即为反演结果,否则继续搜索、正演、比较,不断重复此过程,直到找到一个满意的解估计。
    This paper briefly reviews the development and the status quo of ground penetrating radar technique, analyses its research and application status, mainly including data processing methods and theoretic forward computation research, emphatically discusses some problems existing at present about single-transmit single-receive radar and brings forward the idea of phased array ground penetrating radar. Its basic thought is to apply ripe phased array technology in military affairs at present to ground penetrating radar, so as to overcome the deficiency that the current radar has.
    本文简要回顾了探地雷达技术发展的历史和当前的现状,分析了其研究与应用状况,主要有探地雷达资料处理方法和理论正演计算研究,着重分析了现行单发单收探地雷达存在的一些问题,并提出了相控阵探地雷达的思想,其基本思路是将目前军事上成熟的相控阵技术应用于探地雷达,以此来克服现行雷达存在的不足。
    This algorithm being easily understood and realized, has the advantages of both finite difference and pseudospectrum methods with results in high computation accuracy and efficiency, and can be applied to the forward computation of seismic wave field.
    该方法原理简单、易于实现,结合了有限差分与伪谱法的优点,具有较高的精度和计算效率,适用于地震波场的正演计算,同时还给出了二维地震波场的理论计算实例。
 

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