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In this paper, we propose the translation-invariant contourlet-like transform with lower redundancy than both the nonsubsampled contourlet transform and the translation invariant contourlet transform.

本文提出了一种具有平移不变性的类轮廓波变换,其冗余度比非抽样轮廓波变换和平移不变轮廓波变换更低。

There arise many techniques in the study of existence of solution for operator equations,such as topological transversality method,upper and lower solutions method,monotone iterative method, and variation method,and bountiful results are obtained.

在算子方程解的存在性研究中产生了许多方法,如拓扑度方法、上下解方法、单调迭代法、变分方法等,获得了丰富的结果。

3At%. Based on the measurement of the grain size, phase contents and their composition, the composition of the trinary interface phase was determined to be 〓, with the thickness of interface phase about 1. 3nm, corresponding to 4~5 atomic layers, and with a lower atomic density as well as a high degree of disorder. In the case, the obtained nano-structure remains stable, unchanged against the continued electropulsing.

在晶粒尺寸和相含量及其成分测定的基础上,确定出三元界面相的化学成分为〓,界面相的厚度约为1.3nm,相当于4~5个原子层,而且具有低原子密度和高无序度,此时,纳米结构相对稳定,在延长的电脉冲处理过程中基本保持不变。

The results show that this kind of roughening elements can possess a wide range of roughness, and the hydraulic resistance decreases with the increase of space between roughness elements, but reduces slowly to a constant, and that flow enters into the turbulently rough zone when Reynolds number reaches about 3 500, in which the hydraulic resistance decreases with increase of relative submergence degree, reducing slowly to a constant too.

通过水槽试验对Y型加糙体阻力特性进行了深入研究。研究结果表明:其糙率具有一个较大的调整范围,且随着加糙间距的增加水力阻力减小,减小的幅度越来越小,最后基本不变;雷诺数在3 500左右水流进入阻力平方区,进入阻力平方区后,随着相对淹没度的增大水力阻力减小,最后达一定值。

The experimental results show that the spectral width caused by using overall affix is 0.28 nm, and the linearity of using two-spot affix increases by 1.89%.

由实验结果得出,在压力为0~4N测量范围内,采用全粘附耦合引起的FBG反射光谱的展宽约为0.28nm;采用两点粘附耦合后,谱宽不随压力而变,而线性度较之全粘贴耦合时提高了1.89%。

In this algorithm, the strongest corner points is adaptively detected with Harris operator and (2n+1)×(2n+1) feature windows is selected for originally mutual gray correlative matching. Continental distance ratio invariant criterion is proposed, and consistency of motion vector is improved by eliminating error matching points with median filter. 9 pairs right points is preserved, 4 pairs composing 1 group, and 5 groups is random distributed to uncoil the motion vector equations. Last, stabilization precision is improved by averaging the 5 groups' solutions.

该方法用Harris算子自适应检测出最强壮的角点,开辟(2n+1)×(2n+1)特征窗进行灰度互相关初匹配;提出欧式距离之比不变准则,通过中值滤波剔除误匹配点,确保运动矢量较高的一致性;最后保留若干正确的匹配点对,分成多组解运动矢量方程,将多组解的平均值作为全局运动矢量以提高稳像精度。

Continental distance ratio invariant criterion is proposed,and consistency of motion vector is improved by eliminating error matching points with median filter.9 pairs right points is preserved,4 pairs composing 1 group,and 5 groups is random distributed to uncoil the motion vector equations.Last,stabilization precision is improved by averaging the 5 groups′ solutions.

该方法用Harris算子自适应检测出最强壮的角点,开辟(2n+1)×(2n+1)特征窗进行灰度互相关初匹配;提出欧式距离之比不变准则,通过中值滤波剔除误匹配点,确保运动矢量较高的一致性;最后保留若干正确的匹配点对,分成多组解运动矢量方程,将多组解的平均值作为全局运动矢量以提高稳像精度。

The polynomial function bases are used to form the approximately matching function. Moreover, the discrete values of grey image is transformed to polinomial function that are exact fit at the considered pixel locations. As a result, The mathematical operations performed such as derivation, integration, and gradient evaluation also give out the polynomial functions, therefore, the system of undetermined coefficient equations is derived to be a system of linear algebraic equations.

我们把立体匹配过程看作泛函的极小化过程,因此选用变分问题近似解法的Ritz法构造数值算法,以多项式函数为基构作匹配函数的近似解,进而又利用多项式过样值点的拟合将离散的灰度图象变换为多项式函数,因此计算中所需的求导,积分,及梯度运算的结果仍然是多项式函数,最终将待定系数方程组化为线性代数方程组。

On the other hand, with the purpose of fuzzy feature extraction and fuzzy classification device design, the undulatory property of maximum and minimum scattering power corresponding respectively to the maximum and minimum eigen-polarization has been investigated in frequency domain. Furthermore, the anisotropy polarization degree of target, which is determined by both maximum and minimum scattering power of target, has been studied; meanwhile, the dynamic changing characteristic of eigen-polarization on Poincare polarization sphere has been investigated by means of the conception of polarization frequency stability, the research result shows that PSD value has a big jump near π, forming a sharp pulse, and different target has their individual distribution property of PSD pulse.

另外,围绕目标模糊特征提取及模糊分类器的设计,研究了目标最大、最小本征极化所对应的目标最大、最小散射能量随观测频率的起伏特性,考察了由目标最大、最小散射能量共同决定的目标的各向异性极化程度;同时,采用极化频率稳定度的概念,研究了本征极化在Poincare极化球面上的动态变化特性,在最大、最小散射能量相等的频率点上,PSD曲线呈现为幅度接近π值的尖锐脉冲,反映了目标极化散射结构对这一频率跳变极为敏感,但不同目标的这种PSD曲线特征又有很大的不同。

By using the variational method the roughness length is calculated and is equal to 0.03 m.

用变分方法计算的地面粗糙度为0.03m。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。