【摘 要】
：
By using orthogonal regression method, a systematic comparison is made between body wave magnitudes deter-mined by Institute of Geophysics of China Earthquake Administration (IGCEA) and National Earth
【出 处】
：
Acta Seismologica Sinica(English Edition)
论文部分内容阅读
By using orthogonal regression method, a systematic comparison is made between body wave magnitudes deter-mined by Institute of Geophysics of China Earthquake Administration (IGCEA) and National Earthquake Informa-tion Center of US Geological Survey (U
其他文献
Multiresolution modeling is becoming a powerful tool for fast display, and geometric data compression and transmission of complex shapes. Most of the existing literatures investigating the multiresolu
提出了一种能有效实现物体表面三维图像数据配准的算法.该算法利用了三维数据采集时的三维点的阵列信息,这些三维点的阵列信息在采集原始三维数据时可以很容易获得,同时,还利用了三维数据矢量/顶点相似特征作为数据匹配的基础.采用迭代最小均方误差算法来自适应优化变换矩阵参数.这些方法可以有效地提高三维图像配准的性能,加快匹配过程的运算速度.实验结果表明该算法可以获得较好的配准后三维图像的主观效果.尽管该方法主
针对人脸识别中人脸图像的特征提取问题,提出了一种将全局特征与局部特征相融合的人脸识别方法.全局特征的提取采用主成分分析算法.主动外观模型定位58个特征点,在其中17个特征点处进行Gabor小波变换则可提取局部特征.归一化的全局匹配度(局部匹配度)可由测试图像和训练图像的全局特征(局部特征)得到.对归一化的全局匹配度和局部匹配度进行融合后,融合匹配度最大的训练图像所属的类即为识别结果.实验利用2个人
为了消除在磁共振成像过程中奇、偶回波之间的相位移动产生的ghost伪影,提出了基于混合空间投影的方法.首先运用混合空间沿相位方向的投影来计算奇、偶回波的相位差,然后对相位差进行非线性拟合并对奇偶回波的相位进行恢复,最后沿相位编码方向作傅立叶逆变换得到校正图像.实验结果表明运用该方法线性和非线性相位差均可以被校正,可以明显降低ghost伪影的强度.实验结果证明了算法消除ghost伪影的有效性.
纵观2005年IT新技术的发展轨迹,我们惊讶地发现,所有这些新技术几乎都指向了同一个目标——数字家庭!对于已经占领了办公室,并全面入住您家书房的IT产品来说,客厅将是下一个主力战场,而作为数字家庭核心的那台新型电脑,也将成为您客厅中的新宠。
Based on one type of practical Biots equation and the dynamic-stiffness matrices of a poroelastic soil layer and half-space, Greens functions were derived for uniformly distributed loads acting on an
The development of Web-based global 3D visual system has made progresses. However, there exist few mature and effective ways for managing, transmitting and visualizing massive spatial data. Based on t
A new method for iris identification based on multiwavelets is proposed. By means of the properties of multiwavelets, such as orthogonality, symmetry, vanishing moments and approximation order, the ir
There is increasing evidence for considerable interlinking between the responses to heat stress and oxidative stress, and recent researches suggest heat shock transcription factors (Hsfs) play an impo