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The fast Fourier transform technology is adopted to calculate the dyadic Green's operator and its adjoint operator during each iteration of CSI, which ensures the high efficiency of the algorithm in stratified medium.

CSI的每一次迭代过程均采用快速Fourier变换技术计算并矢Green函数算子及其共扼算子，确保了该算法在三维层状介质情况下的高效率。

But this does not mean that the adjoint method can not be used to calculate the gradient.

但这并不意味着在梯度计算中不能使用伴随方法。

The adjoint model method is introduced to calculate the gradient of the objective function, and then the inverse problem is solved.

正问题和反问题有着本质的不同，在解的定义和求解方法上也有很大的区别。

I wanted not to understand, make an appointment with what write in their conduct propaganda hourly can earn advertisement to expend amount to RMB 50 yuan, adroitness hind can amount to 70 yuan, can earn 100 above everyday, how do this calculate?

我就想不明白了，他们宣传中写的每小时约能赚广告费折合人民币50元，熟练后可达70元，每天可以赚一百块以上，这个怎么算？

Methods On the basis of a great deal empirical and calculated data, a fundamental calculating formula was derived to calculate cosmic radiation dose rate in aerosphere from sea level to altitude of 25 km.

在大量实验和计算数据的基础上，推导出计算从海平面至25 km高度地球大气层中任意位置宇宙辐射剂量率的基本计算公式。

A finite element model is proposed to calculate the mechanical state of a moored aerostat system. The difficulty in matching the loads of the tethers is overcome by releasing the tether constraints and applying the load step by step. The causes of non-convergence during computation is investigated and solved by modifying the criterion appropriately.

针对浮空器地面系留系统采用多级系绳集束设计导致有限元建模中系留力难以施加的问题，提出了分步加载，对系绳节点逐级建立载荷匹配关系的建模技术；对囊体局部应力集中导致计算难以收敛的问题进行了分析并提出解决方法。

This method utilizes the invariant properties of affine geometry to calculate the affine invariant, which has a more fast process speed.

该方法利用仿射几何中的特征区域面积比的不变性质构造仿射不变量，在处理速度上具有较为明显的优势。

Firstly, we calculate the Lie point symmetry of 1+2-dimensional nonlinear evolution equation:Which arises from the motion of plane curves in affine geometry.

我们首先计算了来自射影几何的平面曲线运动的非线性发展方程：所容许的李点对称群。

The paper studies the rational back aggraclation width of yellow river dike with reliable theory,researches and formulates the finite element reliability program of Monte-carlo filtration for calculate the failure probability of filtration stability for soil body of different distance from slope base of yellow river dike under design flood level,thus determines the rational back aggradation width.

利用可靠性理论对黄河堤防淤背设计的合理宽度问题进行了系统的分析研究，充分考虑了黄河堤防土体参数的随机变异性，研制了蒙特卡洛渗流有限元可靠度程序，用来计算在设计洪水位下距黄河堤防背河坡脚不同距离的地层土体渗流稳定破坏概率，从而确定合理的淤背宽度。

You can make better conclusions if you can calculate the volume of air in the balloon.

若你能算出气球中空气的体积，就能得到更好的结论。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了