脉冲波

Such characteristic vector can be applied to further signal processing and fault diagnosis of high current LIA.

应用小波变换具有良好的时频局部特性，通过对强流直线感应加速器脉冲信号的去噪声、信号突变点检测以及时间间隔测量等处理，表明小波变换在LIA信号处理中有广泛的应用前景；利用小波包分析的每个节点都代表了对应频带的信号特征的特点，对"神龙一号"快脉冲波形数据进行小波包变换，以各频带信号能量为元素构造特征向量，实现了高维波形数据的特征值提取，达到了数据压缩和降维的目的，为进一步实现LIA故障智能诊断、预测维护提供了一种可行的途径。

Direct numerical simulations have been carried out for acoustic, vorticity and density pulses in two- subs...

对二维情况，计算了亚音速均匀流中初始声、涡和熵脉冲波问题，得到了很好的结果。

The acoustic field of the pulse wave source is measured, the measuring value is in accordance with the calculating results on the whole.

对脉冲波声场的测试结果表明，数值计算和实测结果有较好的一致性。

The main characteristics include: the quiet Sun corona has a rapid response to the flare heating, within 2 second the corona temperature increases nearly one order of magnitude, but later such increase becomes very slowly; the downward velocity at early stage of impulsive phase is too small to be negnected; chromospheric evaporation made by conduction shows some intensely, the maximum evaporated velocity may be as large as 1000 km/s; the chromospheric condensation appears just when the chromospheric evaporation takes place and its place always coincide with that of transition region in the early stage; the maximum of chromospheric condensation occurs also in the early stage of impulsive phase, at which the density in condensation may be larger two order of magnitude than that of surround and the downward velocity may be as large as 100 km/s; after the maximum of chromospheric condensation, its strongth decreases gradually but its width becomes greater with time and have a tendency to transport into deep chromosphere; the front of chromospheric condensation heats atmosphere obviously and the temperature in the chromospheric condensation is higher than the original case; the downware velocity of transition region may be greater than 100 km/s at the early stage; when the evaporated material collide at the top of loop, the densityand the presure there increase rapidly, which result in the formation of a shock wave; and so on.

在改善色球辐射损失和精确分辨过渡区的基础上，通过联立求解连续性方程、动量方程和能量方程，构造了一维磁限制性耀斑环在热沉积作用下的大气动力学模型，获得了耀斑热模型下脉冲相早期较为细致的大气演化理论图象，其主要特征是：耀斑对宁静日冕的加热相当迅速，仅2秒钟日冕温度增加即达一个量级，之后日冕温度增加缓慢；脉冲相早期日冕向下速度很小，几乎可以忽略，热传导驱动色球蒸发，其过程较为激烈，蒸发极大速度可达到1000km/s；色球压缩区与色球蒸发几乎同时形成，且在早期其位置总是与过渡区位置重合；色球压缩极大发生在脉冲相早期，其时密度可高于周围约2个量级，向下速度可超过100km/s；色球压缩极大后，其强度逐渐减弱，但宽度明显增大，且渐渐脱离过渡区往色球传播；压缩区内物质温度要高于原先的大气温度；过渡区下降在脉冲相早期相当迅速，可超过100km/s；当蒸发物质在环顶高速相碰时，环顶的密度、压力迅速增大，且温度也有所增加，导致形成激波，其波面以每秒上百公里的速度自环顶向下传播；在脉冲相前期，日冕软x辐射对色球的加热作用可以忽略；等。

Result Biphasic electrical field pulse extended the APD longer than that with monophasic one.

结果 双相电场脉冲比单相脉冲更多地扩展细胞的动作电位时程；不同强度的双相波电场脉冲，对动作电位时程的扩展能力非常相近，而不同强度的单相波对动作电位的扩展能力差别很大，电击后动作电位时程空间分布不均匀；动作电位的扩展主要取决于脉冲强度的峰值，和脉冲持续时间关系不大。

For a relatively longer intense short-pulse laser, especially when local phase matching in the laser pulse between the ponderomotive force and the wake plasma oscillation occurs, there is strong electron acceleration in the laser-excited wake field and weak acceleration inside the laser pulse.

对于脉冲相对较长的短脉冲激光，尤其是在激光脉冲内等离子体尾波振荡和有质动力发生局域的相位匹配时，在激光激发的尾波场电子有很强的能量，这时在激光脉冲内电子的有质动力加速效率很低。

Effects of pulsing electromagnetic fields with different wave forms on proliferation of osteoblasts.

不同脉冲波电磁场对成骨细胞增殖的作用。

According to the comparison analysis for the force-displacement relationship obtained from stets of earthquake simulation tests for 3 RC single story structures and the quasi-static test for one RC single story structure (identical with the former 3 models), as well as the analyses for the natural frequency change of the 3 RC single story structures with the increase of the excitation levels, it is found that the accumulated hysteretic energy-dissipation capacity is critical for the structural safety even after serious damage.

本文首先通过对近场破坏性地震动的特性分析，给出了脉冲型地震动的量化定义，并通过研究归一化反应谱变化规律的方法，分析了两类脉冲组合即：波前脉冲组合以及波后脉冲组合对于主脉冲作用效应的影响，总结归纳出波前脉冲与波后脉冲对主脉冲作用效应的不同贡献规律，并通过单层钢结构模型的地震模拟振动台试验验证了理论分析结果，为进一步研究揭示脉冲型地震动中主脉冲的破坏能力奠定了基础。

They have magnetrons, microwave-generator s, amplifiers and integrated systems.

两个或两个以上的脉冲波传送器，攻击目标区域，并加强其效果。

This paper expouds the characteristics of quasi-continuous wave radar,and compares the pulse Doppler radar with CW radar and quasi-CW radar.

阐述了准连续波雷达的特点，并对脉冲多普勒雷达、连续波雷达和准连续波雷达进行了比较，结果表明准连续波雷达优于脉冲多普勒雷达和连续波雷达。

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。