Error-regulating method for magnetorheological finished aspherics focused on spatial frequency;
基于空间频率评价磁流变抛光非球面中频误差
Influence of spatial frequency calibration on OTF test precision;
光学传递函数测试及空间频率标定方法
Qualitative Investigation to Diffraction efficiency Versus Spatial Frequency of Hologram Grating;
全息光栅衍射效率与空间频率的定性研究
Results We find that for normal adult,the latencies evoked by square-wave checkerboard at periphery of four direction are getting longer and longer by increasing the space frequency,for the amplitud.
结果正常人的周边VEP在这4个方向上的N75、P100的潜伏期均随空间频率的增大而增大;N75-P100的峰值却有一个最适的空间频率,即N75-P100峰值只在这个最适空间频率下最大;另外周边区VEPN75、P100的潜伏期均较中央区VEPN75、P100的潜伏期明显延长,周边区VEPN57-P100的峰值均较中央区VEPN75-P100的峰值低。
Taking the ratio space frequency error and the mean gradient as criterions,experimental results demonstrate that the algorithm is very effective and is able to fuse multi-source images.
该算法对多源图像进行提升小波分解,并针对分解后的低频和高频分量各自的特点,选用不同的规则进行融合,即低频近似系数采用基于邻域空间频率加一致性检验,高频细节系数采用基于像素点的绝对值取最大,最后进行提升小波逆变换得到融合图像。
Methods 89 children with amblyopia(139 eyes) received wearing spectacles,traditional patching,space frequency stimulation therapy.
方法对89例(139眼)弱视患儿进行戴镜、遮盖或压抑治疗、弱视训练及自律空间频率视觉刺激训练等综合治疗,观察其治疗效果及其相关因素。
A new kind of moire fringe projector controlled by computer is used for changing the spacial frequency to adapt the contour of the object to be measured.
它采用了一种可由计算机控制的、可变空间频率的莫尔条纹投影仪，利用不同空频的两次变精度测量，以适应待测物体形面的突然起伏。
A new method for improving signal/noise ratio and resolution by dual direction prediction in frequency-space domain;
一种频率空间域双向预测提高信噪比及分辨率的新方法
Combined boundary conditions of quasi-P wave within frequency-space domain in VTI media.;
VTI介质准P波频率空间域组合边界条件研究
Numerical simulation in the frequency-space domain has inherent advantages,such as:it is possible to simulate wave propagation from multiple sources simultaneously;there are no cumulative errors;only the interesting frequencies can be selected;and it is more suitable for wave propagation in viscoelastic media.
频率空间域地震波数值模拟具有独特的优势:可以同时模拟多源的波传播、每个频率之间独立并行地计算、计算频带选择灵活、不存在累计误差、容易模拟粘弹性介质中地震波传播。
Quasi P-wave forward modeling in frequency-space domain in VTI media.;
VTI介质频率-空间域准P波正演模拟
Seismic modeling of scalar seismic wave propagation with finitedifference scheme in frequency-space domain.
标量地震波频率-空间域有限差分法数值模拟
optical spatial frequency filter
光学空间频率滤色器
It includes topics such as spatial frequency filtering, holography.
它包括空间频率滤光、全息摄影。
Effects of Spatial Frequency , Strokes, and Word Frequency on Chinese Character Recognition
空间频率、笔画数及字频对汉字识别的影响
Methods based on spatial frequencies evaluate the coefficients of the autocorrelation function of the texture.
基于空间频率的方法估计纹理的自相关函数。
Relation between Spatial Frequency Due to Small Perturbation of Optical Beam and Gain of Kerr Medium;
Kerr型介质的增益与光束小扰动空间频率的关系
Researches of Visually Cognitive Phenomena Based on Spatial Frequency Multi-Channels
基于空间频率多通道的视觉认知现象的研究
Spatial Frequency Ratio Image Fusion Method Based on Improved Lifting Wavelet Transform
改进提升小波变换的空间频率比图像融合
Frequency Regulation Frequency regulation is a measure that states the difference between no-load and full-load frequency as a percentage of full-load frequency.
频率调整率频率调整率是指空载和满载之间频率的差别与满载频率的百分比。
It is the natural frequency of emission of the hydrogen atoms in space .
这是空间氢原子“释放”的自然频率。
The Space Vector PWM Technique Base on the Random Switching Frequency
随机开关频率电压空间矢量SVPWM技术
The Extraction of Spontaneous EEG Based on Time, Frequency and Spatial Information;
基于时间、频率和空间域的自发脑电信号提取
It represents the spatial encoding of frequency, just like a piano. (example).
就象一架钢琴，它代表了频率的空间编码(举例)。
The Research on Gait Recognition by Integrating Spatial Features and Frequency Features;
空间特征与频率特征相结合的步态识别研究
A Ka-Band Spatial Power Dividing/Combing Transition Circuit
一种Ka频段空间功率分配/合成过渡电路
Research and Development of High Voltage Converter Power Unit by Virtual Space Technology
高压变频器功率单元采用虚拟空间技术的研发
Iterative Detection of MIMO System over Frequency Selective and Spatial Correlative Channel
频率选择性信道下空间相关MIMO的迭代检测技术
A High Efficient 50W Ku-band CW Spatial Power Combined Amplifier
Ku频段高效50W连续波空间功率合成放大器
Research on Natural Frequency Characteristics of Horizontal Layered Soils on Half Space
半空间上水平层状场地自振频率特性研究