脉冲波

In order to improve the operation frequency, the self-suck resonator pulse detonation engine was founded, the ignition principle of the new engine use the method of shock focus autooscillation, so, it possess high ignition and operation frequency, many experts have taken experiment and numerical simulation. However, the physical processes in the resonator cavity are very complicate,the reliable theory haven't set up by now, require the further study.

为了提高脉冲爆震发动机的工作频率，自吸气共振型脉冲爆震发动机模型被提出，该新型发动机点火原理采用激波谐振聚焦点火方式，具有很高的点火及工作频率，许多专家对此进行了实验研究和数值模拟，但由于谐振腔内的物理过程非常复杂，到目前为止没有一套可靠的理论，有待于进一步研究。

Press waveform deci:Can is divided into continuously sine wave, pulse voltage, pulse sequence etc..

按波形分：可分为持续正弦波、脉冲电压、脉冲序列等等。

The application of reflected optical difference system in surface crack of aluminum detection is also discussed. By analyzing the experimental data, we found that the reflected pulsed wave techniques could be used to measure the position of crack precisely and depth imprecisely. Transmitted wave contain much size information of the crack, despite without position information. The spectrum of transmitted is sensitive to the depth of crack. The deeper the crack is, the narrower the spectrum bandwidth is.

使用自建的光偏转差分检测系统，对铝样品中多种表面缺陷进行了检测，对表面波直达波，反射波，透射波波形及频谱进行了分析，讨论超声表面波与各种缺陷相互作用后的变化，通过对实验结果的分析，发现缺陷脉冲发射法可以精确测定缺陷位置，粗略估计缺陷深度；而透射法测的波形无法定出缺陷位置，但包含了缺陷大小信息，透射波频谱对缺陷深度非常敏感，随缺陷深度的加深，频谱不断的左移。

D False images caused by side lobe, multiple reflection images, and secondary reflection images

雨雪回波脉冲的旁瓣回波，多次反射回波，二次反射回波。

The system provides a choice of three different effects toning lifting, improving circrlation and mrscle relaxtion. It does this by varying the shapes of the impulses or waveforms. The waveforms are sine ramp and square.

花想容微波拉皮仪提供了三种不同的效果以供我们选择：收紧和提升，改善血液循环和放松肌肉，它靠几种不同的脉冲或微波来达到这种效果，这些微波是：正弦波、斜波、方波。

The target model is structured using vector resultant of multi-scatter center. Second, based on the character of land clutter, different kinds of land clutter are simulated. Last, the hardware of the system is designed.

首先分析了目标的反射特性，利用多散射点合成的方法建立目标回波模型；然后根据地杂波的特性，模拟产生了不同分布类型的地杂波；最后设计了脉冲体制目标模拟器的硬件实现方案。

The performance of PML is investigated using FDTD modeling of the propagation of sinusoidally modulated Gaussian pulse in a rectangular waveguide.

首先通过模拟正弦调制的高斯脉冲在波导中的传输来验证 PML 的吸收性能，然后将采用 PML 吸收边界的 FDTD法应用于矩形波导填充有限媒质时的 S参数和圆形波导中矩形薄膜片反射系数的计算。

The SAR imaging algorithm of moving spot targets in the background of ground clutter s;2. To perform the simulation of ground clutter received by space-based pulse doppler radar,a method based on the analysis of cohered video is illustrated in this paper.

针对星载脉冲多普勒雷达的地杂波仿真问题，介绍了基于视频信号的模拟方法，并且给出了具体的计算公式、原理和步骤；从理论上分析了星载PD雷达的地杂波谱；最后通过仿真分析了主瓣杂波与天线视角的关系，以及主瓣杂波与地球转动之间的关系。

The essence of range measurement technique in pulse laser fuzes is to measure the time difference of transmitted pulse and echo pulse.

采用电子计数法实现脉冲激光引信定距的本质是测量发射脉冲和目标反射回波脉冲的时间差。

In order to satisfy the equipment of physical experiment, it developed beam pulse technology research on ns-200 accelerator. It uses sine-wave beam adjustment pipe focused beam match design research beam pulse system、high frequency power supply system, pulse measure system and distance auto-control system.

在ns-200中子发生器上开展了束流脉冲化技术研究工作，采用正弦波速调管聚束方法设计了束流脉冲化系统，研制了高频电源系统、脉冲测量系统和远程自动控制系统。

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。