等离子体

The effect of plasma densities and plasma collision frequencies on the field amplitude,field phase and reflection coefficient of the cavity is computed and analysed.It is clearly shown that the absorption of plasma to microwave is increase...

数值计算结果表明，在一定的等离子体密度下，随着等离子体碰撞频率的提高，等离子体对微波场的吸收增大，此种开放式的结构可有效地在腔中形成有利于微波等离子体产生的驻波场。

The electron density is an essential parameter in thermonuclear fusion research, for which can be measured mainly by the technique based on transmission characteristic of electromagnetic waves in plasmas.

高温等离子体的电子密度是热核聚变等离子体研究中的一个重要物理量，测量等离子体电子密度的方法主要是应用电磁波在等离子体中的传播特性和技术。

Discussion focuses on the operating principles and structures of the newly developed high density plasma sources,including electron cyclotron resonance,inductively coupled plasma and helicon wave plasma.

对电子回旋共振等离子体，感应耦合等离子体，螺旋波等离子体等几种新型的高密度等离子体源[1] 的工作原理及结构重点作了分析讨论，并从运行参数上对其进行了比较。

Working process of the piccolo injector plasma generator is analyzed and computing model is modified. Improving the piccolo injector model, and having the coupling computation with the model of interior ballistics. From the result of experimentation, the model is validated and can be used in predicting experiment.

修正了D型等离子体发生器的准稳态模型，建立了中心电弧等离子体发生器的准稳态模型；将中心电弧等离子体发生器模拟模型与一维两相流内弹道模型耦合，建立了基于中心电弧等离子体发生器的电热化学炮的内弹道预估模型。

The migration distance is closely relative with the distribution of the magnetic flux density.

对等离子体鞘层的研究是等离子体实验中的一个重要问题，利用磁场调控鞘层中等离子体的动量及能量分布，使等离子体表面工程优化，已成为国际上一个新的研究热点。

It was conclude that the influence of the air pressure on the mechanical effect of the plasma shock wave does much matter with the defocus distance of target. The influence of target materials, target area and target structure on the mechanical effect of the plasma shock wave is analyzed.

论文还分析研究了激光等离子体声波和激光等离子体冲击波力学效应的关系，提出了利用激光等离子体声波特征量判断激光等离子体冲击波力学效应的方法。

A general Godunov finite difference schemes-WENO (Weighted Essentially Non-Oscillatory) schemes which have fifth-order accuracy is used to perform a numerical calculation for 2-dimensional axis symmetrical laser-supported plasma flow field under laser ablated solid target.

采用具有五阶精度的WENO差分格式和简易等离子体状态方程模型对激光与等离子体相互作用的复杂物理过程进行了数值计算，分析了激光束能量在等离子体区中的吸收、屏蔽效应等动态耦合规律以及激光支持等离子体前驱冲击波传播。

We found that in the case of neglecting magnetic shear, the plasma current also can be driven by the shear Alfvén wave and the circularly polarized wave, respectively, the efficiency of current drive in the rotation plasma is independent of the plasma density In addition, it is found that whether m=0 or m≠ 0, the effect of the magnetic shear on the compressional Alfvén wave current drive makes the efficiency be dependent on the plasma density and inversely proportional to it.

当考虑旋转效应而不考虑磁剪切效应时，等离子体平板模型下平面极化压缩阿尔芬波能够驱动旋转等离子体电流，驱动效率也与等离子体密度无关，却与旋转大小成正比，这与Avinash[Phys Plasmas 4，2204（1997）]的结论一致。我们发现在这种情况下剪切阿尔芬波和圆偏振阿尔芬波都可以驱动旋转等离子体电流，旋转效应引起的电流驱动与密度无关。

Experiments have been performed using ultra-short (30fs) ultra-intense laser pulse(up to 1018W/cm2) focused into under-dense plasmas(ne＜1020/cm3). A 2ω0 probe pulse was used for the shadowgraphy and the investigation on the propagation of laser under various condition was presented.

开展超短超强激光与次稠密等离子体相互作用实验，采用探针光对激光等离子体相互作用区域进行阴影成像，研究了不同激光功率与临界功率比值及不同激光脉冲长度与等离子体波波长比值下的激光在次稠密等离子体中的自聚焦传输。

The results showed that the higher thedischarge voltage or charge capacitor was, the higher the temperature of the plasma was,and the longer plasma discharge time was. There was a late discharge when the inputenergy reached the critical value. The greater the capacitance or voltage was, the earlier thelate discharge of the plasma was. The temperature changes of plasma at the beginning of alate discharge were not significant under different discharge conditions. Each SCB had itstemperature range respectively.

结果表明：放电电压或充电电容越大，等离子体温度越高，等离子体的放电时间也越长；对于不同的SCB，当输入能量超过一定的临界值后，将产生等离子体后期放电；电压或电容越大，后期放电开始的时间越早，而后期放电开始时的等离子体温度，在不同的放电条件下变化并不大，不同的SCB均有其各自的温度变化范围。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。