激波

Our main work is as follows: the stable laser mode theory in uniform plasmas is extended to non-uniform plasma cases; the discussion of the sufficient and necessary conditions for laser self-focusing in uniform plasmas is developed to non-uniform plasma cases; a quantitative approach to judge the impact of different plasma density distribution on laser self-focusing is proposed; the evolution properties of asymmetric laser filed in non-uniform and uniform plasmas are discussed and mechanisms that symmetric channel-like plasmas can confine the laser centroid around the plasma channel axes and symmetrize initially asymmetric laser beams are proposed; the formation of solitary standing wave in moderate plasma density is studied by PIC simulations and can be explained by stimulated Raman scattering of laser beams in plasmas.

主要工作为：把均匀等离子体中激光的稳定模理论推广到横向非均匀等离子体情形；把均匀等离子体中激光自聚焦的充分和必要条件的讨论推广到横向非均匀等离子体情形；给出横向密度分布不同的等离子体影响激光自聚焦的定量判据。讨论了初始不对称的激光场在横向非均匀及均匀等离子体中的演化特性，并提出了具有对称腔道结构的等离子体箍缩激光质心和对称化初始不对称激光场的物理机制。用粒子模拟讨论了激光场在等离子体中形成孤立驻波的过程，认为前向受激拉曼散射是发生此现象的可能机制。

The influence of uniform magnetic field or PPM field on suppressing BWO(back-wave oscillation) is analyzed on the basis of the 2-D small signal model.

在2维小信号模型的基础上，分析了均匀和周期永久聚焦磁场对抑制返波自激振荡的影响。

In order to solve those problems,this paper presents a signal conditioning method with the averaged value of the first harmonic and proposes an intermitted exciting mode.

为了解决这些问题，本文提出了基波平均值的信号调理方法和间歇激磁方法，检定结果表明了该种方法的有效性。

It has nonreciprocity similar to that of ferromagnet on condition that the external magnetic field is parallel to magnetic lattices, and the dispersion relation of the antiferromagnet has nonreciprocity , too.

通过计算和讨论得到了当外磁场沿x轴方向，原磁晶磁矩沿z轴方向，波矢沿±y轴方向时，反铁磁质表面磁极化激元的极化与铁磁质在平行于磁晶磁矩的外磁场下的极化相类似，具有非对易性，且其色散关系也具有非对易性。

Early spring uses "to protect sets up general" 100 time of fluids + Baume 3 lime sulphurs clear gardens disinfection, not only the sterilization extinguishes the insect, but also can suppress the extraneous source gene stable heredity, thus stimulates a series of defense response, causes the fruit tree to have the intense resistance, at the same time may hit stirs up the fruit tree "the gene alarm clock", when does the reminder fruit tree regain consciousness from the hibernation, when germinates, blossoms, the sensitive plant nerve, causes the fruit tree vegetal period to be full of vigor.

早春用&护树将军&100倍液+波美3度石硫合剂清园消毒，不但杀菌灭虫，还能抑制外源基因稳定性的遗传，从而激发一系列防卫反应，使果树产生强烈抗性，同时可撞激果树的&基因闹钟&，提醒果树何时从冬眠中苏醒，何时发芽，开花，敏感植物神经，使果树生长期精神饱满。

Based on the well known optical them distribution in free space a generalizedstimulated Raman scattering coupled wave equation is deduced and a simplemethod to calculate the temporal and spatial distribution of pump beam and Stokes beamin SRS is proposed in the paper.

基于在自由空间光束的分布是已知的条件下，推导出适用于任意束分布的广义化的耦合波方程并得到一种计算受激拉曼散射过程中泵浦束与斯托克斯束的时、空分布的简单方法。

Firstly, we studied the interaction between the excitons and the multi-mode light field under rotating-wave approximation .

首先研究了旋转波近似下，激子和多模光场相互作用模型。

We calculate the eigen decay rate andmixture of the excitons with different vave vectors.

求出了各个本征衰率和不同波矢激子的混合。

The ANSYS/LS-DYNA software was used to simulate the stress wave pattern and the pulse width in the process, as the hammers had different masses and the radius of impact head and its elastic modulus had different impact velocities, and the prestressed bolt was excited by hammers with different masses and different hardnesses in laboratory.

然后运用ANSYS/LS-DYNA软件模拟了不同质量、撞击头半径和弹性模量的撞击杆以不同的速度撞击长杆的应力波形态和脉冲宽度，并在实验室对预应力锚杆用不同质量、不同硬度的力锤进行了激振试验。

The InGaAs/GaAs/AlGaAs strained layer quantum well lasers were grown by molecular beam epitaxy. Ridge waveguide InGaAs/GaAs/AlGaAs strained layer quantum well lasers operating in the fundamental transverse mode up to 140 mW at a wavelength of 980 nm were fabricated.

利用分子束外延生长了InGaAs/GaAs/AlGaAs应变量子阱激光器材料并研制出基横模输出功率大于140 mW，激射波长为980 nm的脊形波导应变量子阱激光器，其微分量子效率为0.8 W/A，垂直和平行结平面方向远场发散角分别为28°和6.8°。

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。