本文提出的“射线参数法”，可由多道地震记录谱直接估算层速度或层速度线性梯度值。
A new method, the ray parameter method, is presented in this paper to derive velocity - or its linear gradient-depth information, directly from multi-channel seismic data.
稳定化双共轭梯度法用于求解稀疏线性方程组，可调节参数的修正迭代法用于求解非线性代数方程组。
Linear equations of sparse matrix are solved by Biconjugate Gradients Stabilized Method and nonlinear algebraic equations are solved by parameter-regulated iterative procedures.
分离系统的线性部分和非线性部分参数学习都采用自然梯度算法。
The natural gradient method is applied for parameter learning of the linear and nonlinear parts of the separating system.
针对两种非线性温度梯度模式及具有不同顶、底板厚度的一般箱梁桥，推导了等效线性化后的特征参数计算公式。
The formula of characteristic coefficient for equivalent linearization is derived for two kinds of thermal gradient modes and general box girders with different depths of top and bottom flanges.
针对复杂背景及目标的分形特性差异，提取图像四个方向的灰度梯度，选择最小梯度大于阈值的区域进行平滑滤波，最后对分维参数进行分段线性拉伸。
Aiming at characteristic differences of background and target, four-direction gradient is extracted out and areas with large gradient are smoothed by a linear threshold filter.
利用最优控制理论可以求得性能指标对参数的梯度，然后利用非线性规划的方法求得最优参数。
Time nodes are parameterized by using this method, and the parameterized control can approximate a piecewise continuous function.
利用最优控制理论可以求得性能指标对参数的梯度，然后利用非线性规划的方法求得最优参数。
Time nodes are parameterized by using this method, and the parameterized control can approximate a piecewise continuous function.
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