谐振模式

The works in the project just done can be summarized as five respects.(1) A device was designed to fabricate the asymmetrical resonant cavities by a pendant drop. A series ARCs with variable parameters provides a valuable experimental method for investigating the characteristics of ARCs.(2) The relationship between the number of active modes and the shape parameters in an ARC was investigated. The experimental lasing threshold was compared with theoretical result, the good agreement between two shown that it was the decrease of the number of active modes in an ARC that decreased lasing threshold.(3) Dye lasing gain was used to enhance the signals of stimulated Raman scattering of the weak gain Raman modes in a circular cavity made by a pendant drop, the instantaneous SRS spectra of weak gain Raman modes in ethanol was obtained by this new method.(4) The SRS signals of minority compound in a binary chemical complex was obtained by using dye lasing gain method. The detection concentration of minority compound was reduced to an order compared with normal SRS method.(5) A cylindrical circular cavity was formed by a liquid jet, which was used to reduce the pump intensity required for laser induced plasma spectroscopy. The limit of detection of trace element in aqueous sample was greatly decreased by this new method.

我们设计并成功制作了使悬垂液滴连续变形的装置，用此装置可以方便地改变非圆对称谐振腔的几何参数，为ARCs的研究提供了一种有效的实验方法；研究了ARCs中活性模式数和变形参数间的变化规律，激光阈值的数值计算结果和激光辐射的实验结果作了比较，二者吻合的曲线说明ARCs中活性模式数量的减少是受激辐射放大阈值降低的原因；在由单元化合物构成的微型圆对称谐振腔中，首次尝试用"激光增益"增强弱增益拉曼模式的受激拉曼散射信号，获得了乙醇分子中弱增益拉曼模式的瞬态SRS光谱；在由二元混合物构成的微型圆对称谐振腔中，用染料的激光增益增强了少量化合物的SRS信号，把少量化合物的SRS信号探测浓度降低了近一个数量级，在SRS应用于瞬态过程的组份分析方面做了卓有成效的探索；用石英毛细管形成的稳定液拄构成拄形谐振腔，降低了激光诱导等离子体光谱需要的激励能量，有效地降低了水相样品的痕量元素分析极限，为LIPS应用于微量元素的化学分析开拓了一条新的技术路线。

A basic theory for constructing cavity resonator with a kind of slowwave transmission lines is presented, the procedure of determining sizes of cavity for a designed resonant frequency is proposed.

分析了盘荷同轴型谐振腔的TM慢波模式，并给出TM主模特征值和谐振频率的计算方程，证明了单一的TM高次模不能作为慢波模式单独存在于这种谐振腔之中，必须由多个高次模共同组成一个谐振模式。

Side of the transformer, hence at the end of the flyback phase.

在准谐振模式里，由变压器电感和场效应晶体管输出电容引起的谐振促使开关的开通时刻发生在漏源极电压的最小值上。

Based on the analogy of the conventional TL resonant mode numbering, a conventionalresonator resonates in only positive-o...

因此，与普通传输线的谐振模式相比，复合左右手的谐振模式可以为正，可以为负，也可以为零。

It is found that the levitation force can be remarkably enhanced by choosing optimum value of R or D, and the possibility of this enhancement for spherically curved reflectors is the largest.

发现通过选择最优化的R或D值，可以显著提高声悬浮力，并且谐振模式数越小，反射端截面半径越大，提高的程度就越大。

It is indicated that the sidelobe has a great influence on the internal resonance modes, the SMSR and the vernier effect.

研究表明：取样光栅的旁瓣对激光器内部谐振模式、激射光的边模抑制比和vernier调谐效应等都有很大影响。

This model builds up the relationship between the levitation capabilities and the geometric parameters of a single-axis acoustic levitator, and proves to be successful in predicting resonant modes, Hm ( m =1, 2, 3, 4), and in explaining the axially symmetric deviation of the levitated samples near the reflector and emitter.

该模型揭示了声悬浮性能和以声波长为参考的悬浮器几何参数之间的本征关系，成功地预测声场的谐振模式 Hm ( m =1， 2， 3， 4为模式数， Hm 为反射端-发射端谐振间距)，并解释了反射端和发射端附近的悬浮样品偏离对称轴的实验现象。

Effective separation of magnetron mode is one of the important problems for stable operation and improvement of efficiency. In this paper, based on field theory and equivalent circuit approaches, characteristics of electromagnetic field and dispersion in several resonance systems of magnetrons are systematically analyzed.

谐振模式的有效分隔是保证磁控管稳定工作、提高效率的关键问题之一，本文应用场论和等效电路的方法，系统地分析了几种磁控管谐振系统中的电磁场分布和色散特性，论证了模式分隔特性对稳定磁控管工作及提高效率的重要作用。

In order to support a preselected resonant mode, a series of concentric rings (18) is formed in the blocking layer (16, 19), surrounding the resonant cavity (2) so as to provide a Bragg structure which reflects light from the cavity with a phase characteristic that supports the preselected transverse resonant mode.

为支持预定的谐振模式，在阻挡层（16、19）中形成一组围绕谐振腔（2）的同心环（18）以提供一种反射腔中的光的布拉格结构，其相位特性支持预定的横向谐振模。

Considering the design parameters of the BEPCⅡ, in the case of one cavity type being adopted, the thesis analyzes the RF performance of accelerating mode, the suppression of higher order modes , and the restriction caused by HOMs against beam current threshold.

结合BEPCⅡ的设计参数，论文对其中一种腔型在BEPCⅡ上使用时加速模式的微波性能、高次模的抑制效果以及高次模对储存流强阈值的限制等方面进行了分析，并在铝模型腔上测量了加铁氧体高次模抑制器前后，超导腔中各种谐振模式的有载品质因子及其频率的分布。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。