pulse diffraction

Its crystal structure, specific surface area, pore size distribution, oxygen storage capacity ( OSC) and redox behavior were investigated by X-ray diffraction, BET, oxygen pulse adsorption and H_ ( 2)-temperature programmed reduction ( H_ ( 2)-TPR).

采用X射线衍射、BET、氧脉冲吸附和H2程序升温还原（H2-TPR）等技术对材料的晶体结构、比表面积、孔结构、储氧性能和还原性能进行了研究。

Considering the influences of the thermally induced diffraction losses and the turn-off time of AO Q-switch on the dual-wavelength pulse, a rate equation model describing the actively Q-switched laser with AO modulator has been established.

在考虑到热致衍射损耗及声光开关时间对双波长调Q脉冲性能影响的基础上，给出了描述LD泵浦调Q双波长激光运转速率方程模型。

It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduced pulse response of acoustic lens.

光声信号声透镜层析成像方法的提出，并依基耳霍夫衍射理论推导了声透镜的脉冲响应。

The temporal and spectral properties of Bessel-Gauss pulsed beams with constant diffraction length in a linear dispersive medium are studied. It is shown that by a suitable choice of the spatial parameter β, Bessel-Gauss pulsed beams propagate along the axis without noticeable pulse broadening.

对等衍射长度贝塞尔-高斯脉冲光束在色散介质中的时间和光谱特性作了研究，结果表明，通过选择适当的空间参数，贝塞尔-高斯脉冲光束沿轴上传输时，脉冲宽度不变。

Taking the Gaussian pulse as a typical example, the characteristics for ultrashort pulsed Gaussian beams with constant diffraction length between propagating in normal and abnormal dispersive media are summarized.

以高斯型脉冲为例，总结等衍射脉冲高斯光束在正常、反常色散介质中的特点。