不变性

As translation, scale and rotation invariant features, the Orthogonal Fourier-Mellin Moments are robust and have good ability of image classification and reconstruction. They have been widely used in scenery analysis, target recognition and image classification.

正交傅里叶-梅林矩由于具有平移、尺度、旋转不变性，以及较强的鲁棒性和图像分类和重建能力，在景物分析、目标识别和图像分类中得到了广泛的应用。

However, proving axisymmetry for the Onsager model is still very difficult, at least for two reasons: The first is that we lack methods for proving axisymmetry, even though there are method for proving radial symmetry or translation invariance.

但是，证明了Onsager模型轴对称仍然是非常困难的，至少有两个原因：第一，我们缺乏证明轴对称的方法，即使是证明辐射对称或平移不变性的方法。

To combine the relative unchangeability and the existence of the difference of the human nature, added with system method, is the presumption and basic road to rebuild economics.

把人性的相对不变性和人性的差别存在有机地结合起来，辅之以系统论方法，则是经济学重建的前提和基本出路。

It is hard to change a person's nature only illustrates nature's relative stability, but does not mean its absolute unchangeableness.

本性"难移"，只是表明本性具有相对的稳定性，但并不表明其具有绝对的不变性。

Based on Wu's elimination method and "divide-and-conquer" strategy, the undetermined coefficient method for constructing polynomial conservation laws of nonlinear differential-difference equations was improved. Furthermore, a Maple package CLawDDEs was developed to automatically derive conserved densities and associated fluxes of polynomial differential-difference equations.

基于吴消元法和"分治"策略，改进了基于标度不变性构造非线性微分差分方程多项式形式守恒律的待定系数算法，并在计算机代数系统Maple上实现了改进后的算法，其中的软件包CLawDDEs可自动推导出微分差分方程的守恒密度及连带流。

Unlike the LSD,the SIC-LSD Hamiltonian is not invariant undera unitary transformation among the occupied orbitals,which must be determined self-consistentlyfrom minimizing the SIC-LSD total energy.

与LSD近似不同，SIC-LSD近似的哈密顿量没有占据态的幺正变换不变性，单粒子态由SIC-LSD近似下的总能量极小决定。

The multi-filter technique for recogn ition of three-dimensional targets is proposed in this paper,which is based upo n the principle of distortion-invariant correlation recognition.

本文基于三维空间目标不变性识别的原理，采用多滤波器并行处理和综合判断的光学相关检测技术，对三维空间目标进行识别。

A linear camera calibration method with vanishing point and the invariance of cross-ratio is proposed.

在已知一个消隐点的情况下，利用交比不变性及消隐点的知识对摄像机进行标定。

Based on the vector module's characteristics of invariance of translation and rotation coordinate transformation,a new fragment matching method is brought forward.

根据向量模在平移、旋转等坐标变换中具有不变性的特征，给出了一种新的碎片匹配算法。

A currency formula of Laplace space solutions is obtained on the non-dimensional reservoir pressure and the non-dimensional wellborn pressure.

在尺度变换下具有"自相似性"和"标度不变性"，从有限认识无限的特殊规律的科学。

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％。