查询词典 unmagnetized

In the frequency domain, the transmission ratios of electromagnetic Gaussian pulses are computed and we analyzed the effect on defect mode properties of unmagnetized photonic crystals produced by its periodic constant, parameters of plasma and parameters of the defect layer, such as its dielectric coefficient, length and position.

从频域角度分析得到微分高斯脉冲的透射率，并讨论该光子晶体的缺陷层介电常数、厚度、位置、光子晶体的周期常数和等离子体参数对其缺陷模的影响。

In this thesis, an unmagnetized, collisionless dusty plasma which consisted of extremely massive, highly negatively charged dust particles, ions and electrons are studied. Considering the effects of hot dust fluid with non-thermal ions and variable dust charge, we study the self-consisted system parameters on the structures of the dust-acoustic solitary waves by reductive perturbation methods.

本论文研究无磁化、无碰撞的、由大质量且带负电量的尘埃颗粒、电子和离子组成的尘埃等离子体，考虑尘埃流体的温度、非热离子和尘埃颗粒电荷绝热变化的因素，使用约化摄动方法研究这个自洽的系统的参数对尘埃声孤波结构的影响。

Due to the fact that water molecule acquired energy from magnetic field and the molecule rotated faster after magnetization process, the growth speed of Escherichia-coli cultivated with magnetized water is faster than that cultivated by unmagnetized tri-distilled, which proved that magnetized water possesses stronger penetrability and solvency.

蛋白质水接触的几率也随之增加，所以磁化水对于蛋白质的结构将有一定的影响。由于磁化过的水水分子活动加快，并获得了高能量，使磁化水培养的大肠肝菌生长速率比普通三蒸水培养的大肠肝菌生长速率快，这就进一步证明了磁化水具有较强的渗透性和对可溶性物质的溶解能力。

The third, since the electrons in the plasma are accelerated and ions move together, some harmful effects are also observed, such as both output powers of RBWO and FEL decrease versus the increase of plasma density. The results agree with the results of linear fluid model. In the unmagnetized plasma-loaded RBWO-FEL, output powers of pump source and FEL are obtained only in a narrow plasma density range and both have maximum. The results of simulation are in good agreement with the experimental results.

模拟分析了磁化等离子体填充的RBWO-FEL，尽管没有发现等离子体填充后RBWO及FEL输出功率的成倍增长，但是观察到等离子体的引入对RBWO-FEL产生以下影响：泵波及FEL的辐射频率的线宽得到明显增加；在较高的等离子体密度下，TM〓模将会被完全抑制；首次观察到T-G模振荡及功率输出，结果同线性理论计算结果基本一致；等离子体中的电子被加速及背景离子的移动将对器件工作产生不利影响。

By the alternating direction implicit and current density recursive convolution technologies for the first time, a new current density recursive convolution alternating direction implicit finite-difference time-domain (CDRC-ADI-FDTD) formulation for collision unmagnetized plasma is presented.

首次把交替方向隐式技术与等离子体的电流密度递归卷积技术结合，给出了碰撞非磁化等离子体的CDRC-ADI-FDTD方法。

A finite-difference time-domain algorithm is applied to study the one-dimensional unmagnetized plasma photonic crystals with inhomogeneous,collision,warm,isotropic plasma under the isothermal hypothesis.

光子晶体的概念最初是80年代末由John S，Yablonovitch E[1-2]等人提出来的，是近年来深受关注的一个新兴的研究方向[3]。光子晶体是由多种介质材料构成，不同介质材料在空间中有周期性的分布结构。

Simulative results show that the electron beam can be transported in the unmagnetized plasma-filled for two reasons. The first, the plasma neutralizes the majority of the space charge forces within the beam. The second, radial electric field generated by electron beam interaction with the plasma leads the beam to converge along axis. By PIC simulation, we find that atomic mass of the background ion effects on the Characteristics of the plasma-filled devices.

非磁化等离子体填充的RBWO-FEL的模拟表明只有在一较窄的背景等离子体密度范围内，电子注才能良好传输，产生泵波及激光功率输出，并都存在有峰值功率点，同实验观测到的结果完全吻合；该范围内，电子注的传输是由于背景离子中和了注中径向发散空间电荷力及注在等离子体中产生的径向的电场使注在轴向汇聚。

The present dissertation gives experimental, theoretical and PIC simulative research on the plasma-filled two-stage backward-wave oscillator and free-electron laser . In experiment, both an unmagnetized plasmafilled and a magnetized plasma-filled RBWO-FEL are studied.

本文在国家&863&计划及国家自然科学基金的资助下，从实验、理论和粒子模拟三个方面全面深入地研究了等离子体填充的相对论返波管-自由电子激光产生高功率微波及激光的物理过程。

The dispersion relations of superluminal waves for the longitudinal collective modes in unmagnetized, collisionless and homogeneous relativistic electron-positron plasmas are derived.

导出了无磁化无碰撞各向同性相对论正负电子对等离子体纵波的色散关系。

It is found thatthere exist three modes in a magnetized, homogeneous, and collisional dusty plasma:the wholly damped mode due to the thermal diffusion, damped electrostatic dustacoustic wave, and damped electrostatic dust cyclotron wavediscovered by the dissertation for the first time; As neutral gas pressure increases,the damping rates of the EDA and EDC waves increase; The effects of dust densityon the EDA and EDC waves are remarkably different from unmagnetized orcollisionless plasma; A possible explanation to plasma crystallization is suggestedon the basis of the present results.

EDA的阻尼速度随中性气体压强的增大而增大，这一点与实验相符，对于EDC也存在同样的关系。尘粒密度对EDA波和EDC波的影响明显不同于非磁化或者无碰撞尘埃等离子体中的情况。当忽略碰撞时，阻尼的EDA和EDC波回到纯振荡波。最后就尘埃等离子体晶化给出了一个可能的解释。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。