脉冲波

In chapter 4, the influence of the wave-front curvature of Raman pulses on the measurement precision of gravitational acceleration in atom interferometers is analyzed with the method of a transmission matrix. It is shown that the measurement precision of gravitational acceleration is highly dependent on the spot size of the Raman pulse, the temporal interval between Raman pulses and the optical path difference of the two counter-propagating Raman pulses.

第四章运用高斯光束传输矩阵的方法计算了原子干涉仪实验中拉曼光束波前弯曲对重力加速度测量精度的影响，得出了精度与拉曼光束光斑大小，拉曼脉冲作用的间隔时间，以及拉曼光束光程差之间的关系。

The contributions to the induced current and voltage by various electromagnetic field components, such as the vertical electrical field, the horizontal electrical field and the horizontal magnetic field, are compared in this paper in terms of integral of Green function and superposition theorem.

结果显示，Agrawal和Taylor模型得到的电压、电流响应是一致的，可以考虑在有界波电磁脉冲模拟器中进行短线缆的效应实验；由于相同的场分量在不同的模型中对电压、电流响应的贡献并不相同，因此在阐述某一场分量对线缆响应贡献大小时，应该首先说明所采用的传输线模型。

The characteristics of the ground and sea clutter have some important effects on the airborne PD radars with look-down mode.

地海面杂波特性对主要采用下视工作方式的机载脉冲多普勒雷达具有十分重要的影响。

We designed a high performance digital front-end system with the function of tissue harmonic imaging in pulse inversion technology.

该前端具有64个通道，支持高斯谱发射和镜像发射，支持反相脉冲谐波成像，能分别对基波和谐波进行动态滤波。

In order to construct the Hermitian matrix,an appropriate pulse in less than 1?ns duration time was generated firstly based on wavelet.

基于小波函数和Hermitian矩阵特征向量，提出了一种产生超宽带正交成形脉冲序列的方法。

The electrodes emitted from a hot cathode (3) and needed for irradiation are focused and then pulsed with waves at a given predefined frequency in an acceleration unit. The electrons are emitted at a given frequency from the irradiation device and directed towards the item (5) to be irradiated.

从用于照射目的而所需的白炽阴极（3）发出的电子在加速器装置中利用特定的可预先确定的频率的波聚焦并形成脉冲，并以特定的频率从电子发射装置发出，并被引导到要被照射的物品（5）上。

Chap. 5 deals with the influence of exciting current distribution on slow decay effect in transient EM radiation. The index theorem is modified.

然后，以行波脉冲天线为例验证了我们关于广谱辐射慢衰减以及电磁导弹形成的理论。

Through studying the mechanism of the electric exploding, an inductive storage circuit with two electric explosive switches is designed to produce shot nanosecond pulse by chopped wave.

论述了电爆炸导体的爆炸机制，设计了两个电爆炸断路开关的电感储能电路，通过斩波来产生一个纳秒级大电流的单触发脉冲。

The result for an aluminum sphere with gaussian pulse incident wave was compared to the theor y value obtained by inverse Fourier transform from the product of Rayleigh serie s with incident wave in the frequency domain, which shows a good agreement.

计算了高斯形脉冲入射下弹性铝球的无量纲反向散射声压，并和由频域的Rayleigh 简正级数解与入射波的频谱的乘积作反变换得到的精确解做了比较，两者趋势基本一致。

The principles are as follows:①preliminary interpretation is carried out on crosswell seismic data in depth domain to establish an accurate velocity model;②sinc interpolating function is used in depth-time conversion to realize waveform fidelity;③the recognition of surface seismic data is utilized to ascertain the reflection characteristics of crosswell seismic data in time domain;④ good spatial continuity of surface seismic data is adopted to retrieve the "hopper" defect in crosswell seismic profiles and the deficiency of lateral contrast between crosswell seismic data;⑤in fine calibration of well-side traces of crosswells and surface seismic data, coincident time-depth relation is used to match two seismic data so as to make the calibration more reasonable;⑥in multi-crosswell seismic data inversion by sparse spike inversion method, lateral restraints are strengthened to ensure the continuity of inversed wave impedance profile.

实现反演的基本原理是：对深度域井间地震资料进行初步解释；建立精确的速度模型；在对井间地震剖面进行深时转换时采用sinc插值函数实现波形保真；利用对地面地震资料的认识来落实时间域井间地震资料的反射特征；利用地面地震资料良好的空间连续性弥补井间地震剖面的"漏斗"缺陷和井间资料之间横向对比性的不足；在井间地震和地面地震井旁道精细标定中，通过一致的时深关系来实现两种地震资料之间的匹配，使井旁道的标定更加合理；在利用稀疏脉冲反演方法进行连井井间地震资料反演时，通过增强横向约束保证反演波阻抗剖面的连续性。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。