本文针对机械结构动力修改的特征导数法(EDM)所存在的问题，提出逆特征导数法(IEDM)。
In this paper, an inverse eigen derivative method (IEDM) for dynamic modification of mechanical structures is formulated for improving the eigen derivative method (EDM).
采用矩阵迭代法可以直接迭代计算特征向量导数，避免了对奇异灵敏度方程的求解。
Using matrix iteration methods, the eigenvector derivatives can be iterated directly, solving the singular sensitivity equation can be avoided.
而且为了保持图像特征，利用图像的方向导数局部地调整非线性扩散系数。
To preserve image features, the nonlinear diffusion coefficients are locally adjusted according to the directional derivatives of the image.
为了保持图像的特征和细节，文章利用图像的方向导数局部地调整正则系数。
To preserve image features and fine part, the regular coefficient is locally adjusted according to the directional derivatives of the image.
通过分析函数的一阶导数与二阶导数图像的特征，提出了一种含有权值的图像边缘锐化的新算法。
By analyzing the characteristics of the function's once and quadratic differential coefficient's image, a new algorithm of images' edge sharpening which contains weights.
本文利用数学定理和新的灵敏度定义给出特征值和特征向量导数的精确解。
The exact solution of derivatives of eigenvalue and eigenvector is presented by utilizing the mathematical theorem and new definitions of sensitivities.
对流线分布和压力响应特征曲线的综合分析表明，部分射开井的压力导数曲线出现两条水平直线段。
Pressure response characteristics for partially perforated wells were obtained by analyzing synthetically the streamline distribution and the pressure response characteristic curves.
将重力场的垂直导数和向上延拓结合起来，有利于揭示地壳上部构造特征。
The combination of vertical derivatives and upward continuation of gravity field is efficient to display the features of shallow structure.
利用能量范数的导数的性质，将超越特征值问题转化为常微分方程的初值问题。
And by using the property of derivatives of energy norms, the eigenproblem is transformed safely into a specific initial value problem of an ordinary differential equation.
在特征集的基础上，讨论了其参数导数的构成情况，用有限个点和函数表示了无穷个参数导数的情形。
Based on characteristic set, the case of infinity parameters is described by using of finite value and functions.
压力导数的子波变换曲线具有明显的形态特征，它是一种正负相间、具有振荡形式的曲线。
Pressure characteristic function curve with significant characters is one kind of curve with oscillation shape and its value between positive and negative.
为求出随机特征对的方差，借助于模态截断概念推出诸特征值与特征向量对随机变量的偏导数。
Partial derivatives of eigenvalues and eigen vectors with respect to random variables for structures are deduced by means of the concept of mode truncation.
当网络连接权值矩阵的最小特征值大于激活函数导数的倒数时，网络并行收敛。
When the minimal eigenvalue of connection weights matrix is greater than the reciprocal of derivation of its neuron activation function, the network will be convergent in parallel update mode.
以光滑函数的一阶导数作为小波母函数 ，研究了管道泄漏特征信号拐点区间的敏感性 ，突出小波变换系数的局部极值性。
The differential coefficient of smooth function was taken as a mother wavelet for researching the sensitivity segment of inflexion of pipeline leakage signal.
以光滑函数的一阶导数作为小波母函数 ，研究了管道泄漏特征信号拐点区间的敏感性 ，突出小波变换系数的局部极值性。
The differential coefficient of smooth function was taken as a mother wavelet for researching the sensitivity segment of inflexion of pipeline leakage signal.
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