查询词典 inversion problem

A new non-linear quadratic programming Bayesian prestack three-terms inversion method is developed; Firstly, this method is based on Bayesian parameter estimation theory, Gaussian distribution is used for likelihood function and modified Cauchy distribution is used for prior distribution; Secondly, covariance matrix is used to describe the degree of correlation between the parameters; rock physics relations are used to constrain the inversion results; at last, this method is transformed into non-linear quadratic programming problem, and inversion results are acquired under several constraints.

本文提出了一种基于非线性二次规划的叠前三参数反演方法。首先基于贝叶斯参数估计理论，假设似然函数服从高斯分布，并使待反演的参数服从于改进的Cauchy分布，从而提高了反演结果的分辨率；其次用协方差矩阵来描述参数间的相关程度，进一步提高了反演结果的稳定性；最后将问题转化为一个非线性二次规划的求解问题，并在多种约束下得到问题的解。

In order to solve the composite inversion problem of the flexible arm structure, an improved identification method is proposed by combining the relaxation method with the modified total compensation method.

为了解决悬臂型桥墩结构在输入信息未知条件下的物理参数识别问题，采用将松弛法与改进的全量补偿算法结合起来的算法，通过对参数的离散化，对输入未知条件下的－悬臂型桥墩结构的多个物理参数进行了识别。

During the past ten years, inversion problem of geophysical data devoted much attention to many geophysicalistes; moreover, variousinversion approaches were advanced.

近十年来，地球物理资料的反演问题引起了越来越多地球物理学家的注意，提出了各种反演方法。

Under analysis the principle of the ant colony optimization, an improved ant colony optimization in solving the seismic data inversion problem is proposed.

蚁群算法具有正反馈性、分布式计算和贪婪式启发搜索的特点，克服了传统优化算法的缺陷。

Introduced the very development present condition of contents of the medicine dynamics research in brief, induce a differential equation inversion problem to lift the method finally.

简单的介绍了药物动力学研究的内容极其发展现状，最后归纳出微分方程反演问题的提法。

Genetic algorithm for regularize inversion is designed, which can avoid linearization difficulty in the nonlinear problem and solve the ill-posed problem in magnetotelluric inversion.

设计了基于正则化反演的实数编码混合遗传算法，避免了非线性问题的线性化困难，并较好的解决了大地电磁测深反演的不适定性和非唯一性。

The advantage and disadvantage of scheduling tasks adopted by the system are analysed.The priority inheritance protocol solution is proposed in view of the emergence of the priority inversion problem.

分析了系统采用的调度方法的优缺点，提出了用优先级继承协议解决优先级反转问题的方法，并将优先级继承协议结合到系统中，最后用实验验证了算法的正确性。

Using the potential function method,we turn the illposed inversion problem into goodposed one,and provide the conditions of the edgepreserving potential function.

通过势函数方式将波阻抗反演的病态问题转为良态问题，并且给出了边界保护势函数所具备的条件。

Then a dynamic inversion tracing control method and a dynamic inversion fuzzy integrated control method are used to design depth control systems for a torpedo respectively. The simulation results illustrate that dynamic inversion fuzzy integrated control method can solve the problem of torpedo depth control more satisfactorily than the dynamic inversion tracing control method can.

提出了基于动态逆的跟踪控制方法和动态逆模糊集成控制方法，并分别将这两种方法用于鱼雷深度控制中，通过仿真说明动态逆模糊集成控制方法比基于动态逆的跟踪控制方法更好地解决了鱼雷的深度控制问题。

In this paper, the following progress has been discussed:(1) the improved conjugate gradient algorithm which combines the inversion equation;(2) the formulation for velvet gene at all directions and the approximation method of Jacobian matrics based on disturbance method;(3) the model is adjusted by analyzing the influence of damp coefficient and correction factor to inversion result ;(4) the influence of damp coefficient to the resolution of inversion is studied. to some degree, we improved the problem of "barycenter ascending shift" to electric anomalous body in 3-D resistivity inversion.

本文主要讨论了以下几个方面的内容：（1）结合反演方程式改进的共轭梯度算法；（2）基于扰动法的线源Jacobi矩阵的近似计算方法及光滑系数矩阵在各个方向上的光滑因子的计算公式；（3）通过分析阻尼系数与修改量校正量对反演结果的影响，提出了利用校正系数对模型修正量进行校正；（4）较为系统的讨论了阻尼系数λ对反演分辨能力的影响，较好的改善了三维电阻率反演中的电性异常体重心的&上漂&现象。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。