谐振

The results show when the frequency ratio of the two-dimensional harmonic potential is a rational number, the quantum level density is discrete.

计算结果表明：当二维谐振子势的频率比值是有理数时，量子能级是分立的，能级密度中的每一条峰正好对应一个量子能级。

Shandong factory mainly produces quartz crystal resonator and oscillator clock and so on.

山东工厂主要生产石英晶体谐振器、钟控振荡器等。

Products for quartz crystal resonators, crystal clock oscillators, voltage controlled crystal oscillator, temperature compensated crystal oscillator.

产品为石英晶体谐振器，时钟晶体振荡器，电压控制晶体振荡器，温度补偿晶体振荡器。

Plate and λ/2 plate were placed inside the Nd∶YVO4KTP green laser cavity with angle 90°between their fast axis.The composite plate composed of HWP,QWP and KTP has the function of QWP.The composite plate with Nd∶YVO4 can effectively suppress the coupling of polarized modes,and multi-longitudinal-mode lownoise green laser was obtained.Since the composite plate counteracted the phase shift induced by temperature sensitivity of quartz plate,the green laser operated with lownoise reliability in different output power and different operation temperature.The threelongitudinalmode, the noise of less than 0.5% and output power stability of less then 1% for 12 hour are obtained in the green laser.

介绍了一种LD泵浦腔内倍频全固体Nd∶YVO4KTP多纵模、低噪音、高功率稳定绿激光器在Nd∶YVO4KTP绿激光器组成的谐振腔内放置厚度约相等的石英晶体λ2波片和λ4波片，使两波片快轴夹角互呈90°，HWP、QWP与KTP构成复合波片，其作用相当于QWP，此复合波法与各相异性Nd∶YVO4共同作用有效抑制了腔内偏振模耦合，获得多纵模低噪音绿光输出此复合波片相互作用由于抵消了石英晶体波片温度敏感引起的相位延迟量漂移，所以此激光器在不同功率、不同工作温度下，均能稳定可靠地运转于低噪音状态实验结果为，绿光输出纵模数为3个，噪音小于0.5%，12 h功率稳定性优小于1

High-frequency continuous modulation on the high-power semiconductor laser is required in our ladar system. The theory and driving methods of the semiconductor laser is summarized in this article. Two kinds of driving circuit including linear power amplifier and resonance power amplifier are designed for continuous and quasi continuous modulated laser.

针对研制的无扫描激光雷达系统，需要对大功率半导体激光器进行高频连续调制，本文总结了半导体激光器的原理和驱动方法，并针对连续和准连续调制大功率激光器的特点分别设计了两套驱动电路，包括线性功率放大驱动电路和谐振功率放大驱动电路。

An important advantage of this system is that boththe energy level splitting and the decay rate of the DQD can be well tuned by varyingthe gate voltage.

利用双量子点冷却谐振子的优点在于，双量子点之间的能级差以及它的耗散速率都可以通过门电压来调节。

As an example,a kind of plan′s RCS in the resonance frequency was calculated.

本文借助该方法计算了一种飞机在谐振区的RCS。

At the same time it had been found that the surface plasmon resonance absorbance of the DDP-modified gold nanoparticles had a large red shift.

用红外光谱分析了DDP与金颗粒表面的结合方式，并通过对等离子体振动特点的分析，用谐振子模型解释了红移发生的原因。

The frequency and the circuit parameters of a rectangular reentrance resonant cavity have been studied by the unperturbed theory and the principle of the equivalent circuit of a ridged waveguide, respectively.

分别采用导体微扰原理和脊波导的等效电路参数，研究了矩形重入谐振腔的频率和电路参数。

The relationship between multivalued spacing of relative permittivity,measuring frequency and length of the sample has been gained.

在微波和毫米波波段，介质复介电常数的测量按测量原理可分为谐振腔法和网络参数法两大类[1]。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。