首先,综述了图像域中分形编码的特性,然后导出在离散余弦变换(简称DCT)域中仿射变换的伸缩因子和偏移量的对应公式。
We firstly overview the properties of fractal coding in image domain, then we derive the corresponding formula of scaling factor and offset of affine transform in DCT domain.
在考虑瞬态过程中动量扩散速度基础上,用拉普拉斯变换法对无限长平板突然起动瞬态动量定解方程进行了求解,并按涡量定义求出涡量分布函数。
Based on the limited momentum propagation velocity, this paper presents the solution of the transient momentum equation by Laplace transform. The distribution functions of velocity and eddy are given.
从压缩算符、压缩相干态、压缩变换与哈密顿量的对角化等几个方面对单模压缩态进行了讨论。
The squeezed state of single module is discussed frome aspects of squeezed operator, squeezed coherent state, squeezed transformation, the diagonalization of Hamiltionian, and so on.
该方法可用于能够产生规则傅里叶变换频谱的所有被测物体的几何量。
This method can be used to measure similar objects with the regular Fourier transform spectrum (FTS).
直接利用电磁场场量的相对论变换,得出了运动分界面处电磁场的边值关系。
The relativistic transforms of electromagnetic field components are utilized, and the relationships between electromagnetic field components on moving interface are derived.
文中用逼近法和双线性变换法,设计了用于圆度测量的高斯数字逼近滤波器,并给出了零相移的递归滤波算法,计算量小,计算效率高,易于实现。
A series of Gaussian digital approximation filters used in roundness measurement were designed on the basis of approximation method and bilinear transformation.
利用FDSP在数字信号处理上的优势,优化改进了离散傅立叶变换(DFT)算法来提取信号特征量。
Making use of the advantage of the FDSP in the digital signal processing, we can optimize and improve discrete Fourier transform (DFT) in order to acquire the characteristic variables of the signal.
与传统的数据长度补零逆傅里叶变换方法相比,在相同的采样分辨率条件下,该方法能有效减小计算量。
Compared with traditional inverse Fourier transform method, which used zeros padding method, at the same condition of sampling resolution, the method proposed could decrease the calculation load.
通过聚焦操作,把各个窄带频率处的阵列输出矢量变换到聚焦频率处,然后求其累积量矩阵。
By focusing operation, array output vectors at different frequency bins are transformed to focusing frequency and individual cumulants matrix is got.
为了提高该算法的速度和精度,对系统的量测空间进行了等价变换,而等价系统的状态空间却没有改变。
In order to improve the speed and precision of this algorithm, an equivalent transformation was taken for the system's measurement-space at the same state space.
该算法将配电网中的功率量测变换为电流量测,实现了雅可比矩阵常数化,支路电流实虚部解耦求解。
Power measurements are all transformed to equivalent current measurements that make the Jacobian matrix constant and calculates current real and imaginary part dividualiy.
该文采用小波矩量法求解导电平面上的三维腔体散射,利用小波变换稀疏化矩量矩阵,加速其求逆,减少了腔体散射的总体计算时间。
Scattering from three-dimensional cavities is solved using the wavelet-MoM method, while the moment matrix is sparsified with help of the wavelet transform.
从群的角度出发,导出了量子力学中的基本力学量与对称变换群中的生成元的关系式。
This paper derives the relationship between the fundamental mechanical quantity in quantum mechanics and the generation element in symmetry transformation group.
结合图像压缩编码的具体应用,从硬件可实现性和计算量两个方面对比了提升框架变换和小波变换。
Combined with various applications in image coding and compression, lifting scheme transform is compared with wavelet transform in both hard realization and computation burden.
本文首先简述一般变换法的有关概念,然后者重论述相量法。
Here we review simply some concepts concerning transform, and then introduce the phasor analysis.
本文提出了用变换控制量的方法来分析含受控源的电路。
The article introduces the method of analyzing the circuit containing controlled source by converting control variable.
同时,该算法的计算量较多尺度小波变换计算量小,有利于工程实现。
Meanwhile, it should be indicated that this algorithm has less computational complexity than multi-resolution wavelet transform, which makes it possible to put into practice.
在双子格模型中,运用HP变换、付里叶变换和玻戈留波夫变换,将简单亚铁磁体的海森伯交换作用哈密顿量对角化。
In the two-sublattice model, the Heisenberg exchange interaction Hamiltonian of the simple ferrimagnetic crystal can be made diagonalization by the use of HP, Fourier and Bogoliubov transformation.
在运动非常激烈时,则首先采用小波变换,然后再用本方法进行块匹配搜索,可减少大量复杂的运算量。
If the movement is drastic, adopt the wavelet transformation first, then use this method to search block match, which can reduce a great deal of complicated calculating.
相量法是分析正弦稳态电路的数学工具,实质上是一种变换方法。
The phasor analysis is a mathematical method analysing sinusoidal steady state circuit. It is essentially a style of transform.
而对于酉变换而言,最重要的一个特征量之一就是保真度。
For the unitary transformation, one of the most important characteristic quantity is fidelity.
最后以直接线性变换法作为测量解算依据、VC 6.0作为软件开发平台建立起了近景摄影量测系统,并对其精度进行了测试。
At last we use the directly linear translation as measure basis and VC6. 0 as software platform to establish a close-range photograph survey system. and also test it's precision.
本文围绕将小波变换应用到变压器的微机保护算法中,为保护算法提取所需的电气特征量方面进行了探讨。
This paper mainly focuses on the implement of wavelet to the Microcomputer-based protection for power transformer, especially to extract some useful information for the protection algorithms.
描述电磁现象的场量在不同的惯性系中有不同的量值,利用洛伦兹变换关系式导出它们之间的变换形式。
We can describe quantities of electric magnetic field in different inertia system, and use Lorentz transformations to educe the transformations between them.
中—低—低变换工艺具有操作简便、蒸汽耗量低、触媒使用寿命长的特点。
The medium low low temperature shift process has the features of simple operation, low steam consumption and long catalyst service life.
从文中分析可以看出,量测变换技术的应用虽提高了算法的运算速度但牺牲了估计精度。
From the analysis results it is shown that the computation speed of the algorithm can be increased by applying measurement transformation technology, but the estimation accuracy will be sacrificed.
首次将团体理论中的LLP变换用于处理两能级原子与驻波场相互作用体系的全量子哈密顿量。
The Hamiltonian solution of two-level atoms interaction with sounding lightwave field is given by using a new method of LLP transformation in solid state physics.
利用多传感器对切削力和振动信号进行监测,通过频率变换提取切削力特征量,采用小波包分解技术提取振动信号特征量。
Signals of cutting force and vibration are measured with multi-sensor and features in frequency domain and time-frequency domain are extracted by using wavelet package decomposition.
另外新算法结合了变换图目标区域的轴向投影统计策略,保证了匹配运算量的降低;
Collecting the distance axis projection, this algorithm not only work well when the target has the scale change or rotation, but also has the low operation cost.
研究了在动态业务量时,可调谐光收发器和波长变换器对生存性WDM网络性能的影响。
The influence of tunable transceiver and wavelength converter to the performance of survivable WDM network under the condition of dynamic traffic is studied in this paper.
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