变换

Then based on CWMS, we propose a new method to enhance the resolution of seismic traces. Firstly, we divide the seismic signal into proper segments by Gabor molecule-windows adaptive to the signal, where each segment is regarded stationary, and then transform it into the Gabor domain. Secondly, we deal with the amplitude spectrum for each segment to expand the frequency band of the spectrum in the Gabor domain. Finally, taking inverse Gabor transform on modified time-frequency coefficients, we get the high-resolution signal.

然后基于变子波模型，提出了一种新的提高地震记录分辨率的方法：第一步，用自适应于地震记录的Gabor分子窗把地震记录恰当地划分成若干片断，每段内信号近似平稳，然后将地震记录变换到时间-频率域；第二步，在变换域对每个分子窗内信号的振幅谱进行处理以拓宽频带；最后把处理后的时间-频率域函数反变换回时间域得到提高分辨率后的结果。

The relative satisfactory results of evaluating the peak height could be achieved by using the graphical measures established on this appropriate baseline in the case of different dilations or resolutions, degrees of separation and parameters of the peak.

基于小波变换是线性变换，提出了一种小波变换用于双组分重叠方波伏安信号定量分析的新的基线选取方法，(1)通过该基线建立的定量测量方法在不同尺度或不同分解次数，不同分离度以及不同峰参数的影响下，均可得到比较满意的峰高定量结果。

An improved wavelet packet algorithmis introduced. Inrushes under different conditions can be identified form different kinds of internal fault on power transformers using the WPA. Simulation results show that correct identification of the inrush can be made with half-cycle sampled data under all kinds of condition.

其中包括：提出利用小波变换对变压器励磁涌流和各种内部故障进行时域分析，构造了一种基于小波包变换的识别变压器励磁涌流的快速算法；设计了一种基于正交小波变换的电力系统振荡与故障的快速识别算法。

By using fast Fourier transform and Hankel inversion algorithms, a data processing method based on Abel inversion for measuring temperature distribution of plasma is studied.

采用基于快速傅里叶变换和汉克耳变换的阿贝尔逆变换数值方法，研究出一种等离子体二维温度场分布的数据处理方法，并进行了计算精度分析。

The relationship between orthogonal linear transformation and theorem of projection is demonstrated in the angle of mathematics analysis meanwhile validating its correctness through analyzing typical applications of transformation.

本文从数学分析的角度推证了正交变换与投影定理的内在联系，通过信号分析中典型正交变换的应用进行了验证，从而揭示了正交变换的内在本质。

Better used to transform the two-dimensional geometry of understanding, such as translation, rotation, zooming, and the master sequence transform matrix of usage.

详细说明：加深对常用的二维几何变换的了解，如平移，旋转，放大缩小等，掌握变换顺序和变换矩阵的用法。

Two-stage matrix converteris a novel matrix converter,which developes from conventional matrix converter.Besides of adopting many ideal characteristics of CMC,TSMC also has many other merits,such as:fewer power switchings,more simplified clamp circuit,simple and reliable inversion,much simple control strategy,etc.

双级矩阵变换器(two-stage matrix converter，简称TSMC)是一种新型矩阵变换器，它继承了传统矩阵变换器(conventional matrix converter，简称CMC)的诸多理想特性，又具有功率开关器件相对较少、箝位电路大大简化、换流简单可靠、控制算法的复杂性降低等优点。

Based on the analysis of traditional converters, a novel circuit is proposed, what it defers from traditional two switches/phase converter is that it has not dump resistance, and that the rise time and falling time of the phase currents can be effectively reduced, and the torque and output power performance of the system is improved.

在分析了常用的功率变换电路基础上，提出了一种基于双开关功率变换电路的改进电路，该电路与常规双开关功率变换电路的区别在于不需要能耗制动电路，能够利用关断相绕组中储存的能量有效缩短相电流的建立和关断时间，改善SR电机高速运行时输出转矩下降和转矩脉动严重的问题，并且电机的输出功率也得到提高。

In this paper, with the Buck circuit topology as the exampleof zero-transition soft-switching PWM DC/DC converters, theoperation principle and characteristics of the conventionalZVT-PWM converter and a novel two phase ZVT-PWM converter areanalyzed in-depth respectively.

文中以Buck型电路拓扑作为研究零过渡PWM软开关DC／DC变换器的代表，分别对传统ZVT-PWM变换器和一种新型的两相ZVT-PWM变换器的工作原理及特性进行了深入的分析。

Monadlist belt reframes improve small commutation algorithm, undertake decomposing to signal with when reframing, use fast Fourier to alternate and fast Fourier inversion are changed is right each child take signal to undertake handling.

单子带重构改进小波变换算法，对信号进行分解和重构时，利用快速傅里叶变换和快速傅里叶逆变换对各子带信号进行处理。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。