系数域

According to the similarity both in aliasing /separation of signal of the ICA model and the embeding/extraction process in the watermarking system, the scrambling image is embeded into the wavelet domain with the linear supraposition.

根据ICA模型中的信号混叠/分离与数字水印嵌入/提取过程之间的相通性，以线性叠加的方式将置乱水印嵌入到图像小波域的某些系数上，检测/提取时通过ICA技术提取水印。3。

The three nodes triangle or the four nodes quadrilateral, especially the trapeziform, are commonly used to generate the arbitrary computational mesh.

计算域初始条件的处理也很重要，初始条件包括计算网格的平均高程、计算网格的糙率系数及初始水深。

On the basis of understanding all kinds of ceding techniques, the system choose DCT technique.

在进行变换域系数编码中，考虑到空间图象传输中信道噪声的影响，本系统没有采用一般压缩编码中常用的Huffsman编码，游程编码和DPCM技术，而是选用了区域编码，分配固定比特的方法，经过分析这种方案的抗噪声能力较强。

Eight 3×3 Kirsch direction templates are convoluted with a SAR image respectively and the maximum of convoluting results is used as the edge strength value of the central pixel in the window. The output gray level of the central pixel is the weighted average of gray levels of its eight neighboring pixels, and the weighting coefficients are corresponding edge strength values.

该方法利用8个3×3的Kirsch方向模板分别与SAR图像进行卷积运算，取其中的最大值作为窗口中心像素的边缘强度值，中心像素灰度值的滤波输出为它的8个邻域像素灰度值的加权平均，加权系数为每个像素的边缘强度值。

The digital watermark was hided by the modification of DCT coefficient of chromatism in the YC_bC_r, the matrix of chromatism was disparted into 8×8 blocks, which were divided into two types by the density of edge point, then the watermark components with different strength were hided into the blocks according to the classification.

利用彩色图像在YCbCr域内对色差分量的DCT系数的改变加入水印，将色差分量矩阵进行8×8分块，根据每个小块内边缘点的密度将所有小块分成两类，不同类的小块分别按照不同的拉伸因子，加入水印信息。

This algorithm quantizes the wavelet coefficients to different region according to the watermarking bit to be embedded, and introduce the features of human auditory system to gain the proper quantization step. In the detection, it uses threshold judgment to achieve blind detection.

该算法仍在小波域上进行，根据不同的水印信息将小波系数量化到不同的区间，并根据心理声学模型的一个结论讨论了量化步长的选择，检测时用门限判别实现了盲检测。

The traditional two-times excitation technique can be improved based on the proposed algorithm in which high accurate recognition of the primary frequency of excitation can be achieved.

研究发现，只有在信噪比较高时，才能用时域最小二乘法来识别油膜的线性动特性系数。

Moreover, the radius of attraction of memorized sample patterns is presented. A Hybrid neural network model for pattern recognition is presented. The model consists of a cascade connection of three neural networks, which are hetero—associative NN、2—D local—connected NN and classification NN respectively.

提出了一种适于模式识别的复合神经网络，它由三个小网：异联想记忆网、局域连接神经网和分类网级联而成，其输入为模式的二维自相关系数，输出为预定的编码，此网可以有效地进行平移不变模式识别，且有很好的容错性和抗噪声能力。

It is pointed out that the stable region minishes while the excitations increase or the damping coefficient d_(33) decrease.

通过分析比较指出随着随机激励强度的增加或随着阻尼系数d_(33)的减少，稳定域减小。

An algorithm for decomposition of multi wave and multi component data into upgoing and downgoing P wave and S wave was derived in frequency wave number domain in this paper. The reflection coefficient versus incident angle was calculated, which can provide foundational data for the AVO inversion of elastic parameters and prediction of fluid factor.

在频率波数域中采用解析法，解出多层条件下海底实测的多分量地震数据分解成上行和下行P波和S波的算法，导出海底各层地震反射系数随入射角变化的递推计算公式，为海底多波多分量AVO弹性参数的反演及流体因子预测提供基础数据。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。