算子域

Moreover, we give some dual properties of these problems, and on this basis, we present a dual algorithm for solving the nonconvex conic model trust-region subproblem.

论文分析了这些问题的对偶性质，在此基础上，通过对偶提出了求解锥模型信赖域子问题的算法，同时证明了算法的全局收敛性以及局部Q-超线性收敛性，并给出了一些数值算例以说明算法的有效性。

This paper firstly proposed some clarity- evaluation- functions of out- of- focus blurred image,they are the sum of square of gray- level gradient vector module,the sum of Roberts- gradients,and the sum of L apla- cian operator.

本文首次提出了用图像灰度梯度向量模方和、Roberts梯度和与拉普拉斯(8邻域微分)算子和作为由于离焦产生的模糊图像的评价函数。

To perform CRS stack depends on the determination of three wave attributes,compared with conventional common middle point stack and dip move out stack,CRS stack can focus more energy in the vicinity of the reflector,therefore can obtain a better zero offset section by stacking events with same phase.

共反射面元的旅行时响应由三个波场属性参数确定，相比常规共中心点(commonmiddlepoin ，CMP)叠加和倾角时差校正(dipmoveout，DMO)叠加，CRS叠加算子能够将地下反射点附近一个邻域内的能量进行聚焦并实现同相叠加，因此能得到更好的零炮检距剖面。

This one-way wave equation fits eikonal equation and transport equation corresponding to full acoustic wave equation in travel-time and first order amplitude. According to the perturbation theory often used in inverse solution, we split the velocity field into intraformational constant velocity background and variable velocity disturbance. Then we calculate time-shift quantity of migration and amplitude correction coefficients for wavefield depth continuation in total uniform formation and each formation.

基于反问题求解中常用的摄动理论，把速度场分裂为层内常速背景和变速扰动，求得整个均匀层波场深度延拓的偏移时移量及振幅校正系数、各层的偏移时移量及振幅校正系数，从而得到一个基于傅里叶有限差分法的双域保幅叠前深度偏移算子方程。

Then, Otus's threshold method is used to segment the image and locate the sea-sky-line, through which the target potential area can be determinated.

采用维纳自适应滤波，抑制随机噪声和高斯噪声；利用Otus阈值法分割图像，确定海天线和目标潜在区；利用Top Hat算子进行形态滤波处理，抑制平缓变化背景并保留高亮度区的目标和强噪声；选择结构元素进行形态开运算，去掉细小的背景杂波干扰；针对远距离舰艇小目标总是出现在海天线附近以及红外目标灰度高于其邻域背景的特点，确定阈值即可分离出真正的目标。

Then it gives two examples for numerical modeling with the Ricker wavelet. Finally, we write out the detailed proving process of the Ricker wavelet formula from time domain to frequency domain.

然后列出2个数值模拟算例并且在最后给出了Ricker子波表达式由时间域变换为频率域的详细推导过程。

Since Gabor feature is robust to illumination and expression variations and has been successfully used in face recognition area. First, the proposed method decomposes the normalized face image by convolving the face image with multi-scale and multi-orientation Gabor filters to extract their corresponding Gabor magnitude maps. Then, the local binary patterns operates on each GMM to extract the local neighbor pattern. Finally, the input face image is described by the histogram sequence extracted from all these region patterns.

鉴于Gabor特征对光照、表情等变化比较鲁棒，并已在人脸识别领域得到成功应用，首先对归一化的人脸图像进行多方向、多分辨率Gabor小波滤波，并提取其对应不同方向、不同尺度的多个Gabor幅值域图谱(Gabor magnitude map，简称GMM)，然后在每个GMM上采用局部二值模式(local binary pattern，简称LBP)算子抽取局部邻域关系模式，最后由这些模式的区域直方图形成的序列来描述人脸。

Based on the conclusion, we adopt a new method to eliminate multiples, which is to use the statistic character of error, obtain inverse wavelet's estimation, correct misshaped inverse wavelets for non-orthogonality in inverse wavelet domain by the estimation. The method mainly has four steps.

在此基础上，本文提出了在逆子波域（单道自适应相减滤波的滤波算子的集合），利用其误差的概率分布特征，对逆子波进行估计，用逆子波的估计对逆子波进行校正来消除多次波的方法。

sobel operator is one of common image fringe detection techniques, using image element's left and right, top and bottom neighborhood field's ash degree weighting algorithm, basing on the principle of reaching extremum at the fringe dot, we carry through fringe detection.

sobel算子是图像边缘检测中常用的方法之一，利用像素的左、右、上、下邻域的灰度加权算法，根据在边缘点处达到极值这一原理进行边缘检测。

Advancing wavefields by the degenerate migrators is actually a linear interpolation between two splitstep terms in the wavenumber domain.

退化的Fourier偏移算子通过在两个分裂步项之间作波数域线性插值来实现波场延拓，每延拓一层需要比常规的SSF地震偏移方法多一次快速Fourier变换。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。