谐振的

The tunable photon broad band radio frequency phaser based on a silicon ring resonance cavity comprises a pumping signal light-generating system, a carrier wave light-restraining double-sideband generating system, a silicon ring resonance system and a measuring system; wherein, the silicon ring resonance system comprises a light coupling device and the silicon ring resonance cavity; the output of the light coupling device is connected with the input port of the silicon ring resonance cavity; wherein, the silicon ring resonance cavity is composed of a silicon annulet and a root of a straight waveguide; the air gap distance between the silicon annulet and the root of the straight waveguide is several ten nanometers or several hundred nanometers; the taking characteristic of the silicon ring resonance cavity is the characteristic of a seasonal reject trap; the transmission rate in the position of a resonance wavelength is equal to zero or is very close to zero.

本发明包括：泵浦信号光发生系统、载波抑制光双边带产生系统，硅基环形谐振腔系统，以及测量系统。所述硅基环形谐振腔系统包括一个光耦合器和一个硅基环形谐振腔，光耦合器的输出连接到硅基环形谐振腔的输入端口，其中：硅基环形谐振腔由一个硅基微环和一根直波导构成，硅基微环和一根直波导之间的空气隙间隔为几十至几百纳米，硅基环形谐振腔频谱特征是周期性的带阻滤波特性，在谐振波长处的透射率等于0或非常接近0。

Three reference current detecting methods are presented for single-phase active power filter, i.e. fundamental current detecting method based on parallel resonance of passive LC filter, fundamental current detecting method based on switched-capacitor filter, harmonic current detecting method based on d-q transformation and its improved circuits.

同样通过采用并联变压器二次侧多补偿绕组的结构来提高有源电力滤波器的容量。4、提出三种单相有源电力滤波器指令电流的提取方法，即基于LC并联谐振的基波电流检测方法、基于开关电容滤波器的基波电流检测方法、基于单相d-q变换的谐波电流检测方法及其改进电路。

Because the conical resonance tube can enhance shock waves, the gas at the end of the conical resonance tube has higher pressure oscillation amplitudes and higher temperatures and heating rates than that at the end of the cylindrical resonance tube.

因为圆锥形谐振管对激波有增强作用，所以在相同条件下，圆锥形谐振管中气体压强的振荡幅度和加热温度、速度都要高于圆柱形谐振管，因而圆锥形谐振管加热性能比圆柱形谐振管好。

Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论，对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟，发现采用锥形谐振管可有效降低工质气体的速度振幅，进而减小在谐振管中声功率的损失；与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比，结果表明，在使用锥形管作为谐振管的热声发动机系统中，谐振管中的非线性效应得到了明显的抑制，热声发动机在基频模式下稳定运行，压比增大而加热温度降低。

The design of aircraft hydraulic system emphasizes particularly on choice of hydraulic component, calculation of fluid self-excitation resonance, avoidance of coupling of pump's ripple frequency and natural frequency of pipeline, and layout of pipeline system, but the design of aircraft structure emphasizes particularly on calculation of stress and intensity.

飞机液压系统的设计侧重于液压元件的选择、流体自激谐振的计算、避免液压泵脉动频率与管道固有频率的耦合及管路系统的布局，而飞机结构设计侧重于应力和强度的计算。

Statistical Energy Analysis is a module measure, which use relationship of energy flow to evaluate dynamics, vibrating response level and sound radiation of the mulriple and syntonic assembly structure.

统计能量分析是个模块化方法，它运用能量流关系式对复合的、谐振的组装结构进行动力特性、振动响应级及声辐射的理论评估，SEA特别适用于高模态密度的高频区，传统的数值计算方法如有限元和边界方法对应力和振动建模获得了很大成功，但对噪声应用存在明显的局限。

And this causes a frequency change Δf. The resonant point tracing algorithm describes how to detect Δf. So it can introduce a feedback frequencydifference -Δf through a closed loop to realize the resonant state o In the digitaldetection scenario, using staircase wave to replace saw tooth wave, it can overcome a lot of shortcomings in the analog system. The character of the staircase wave affects the detection precision directly. This thesis analyzes a high precision scenario producing a staircase waveform in detail. It can reduce the number of the bits in D/A converter greatly. This thesis proposes another method to improve the detection precision in case that the A/D converter has comparatively little number of bits, while this method will not increase the cost of the system greatly.

在谐振式光纤陀螺中，环形谐振腔的旋转使得谐振腔的谐振频率发生了变化，从而产生了一个与旋转速度成正比的频率变化值△f，谐振点跟踪算法描述了如何检测出△f，从而可以通过闭环在系统中引入反馈频差-△f，实现光路的谐振状态；在数字闭环检测方案中，用阶梯波作为反馈信号来代替锯齿波，可以克服原来模拟系统中锯齿波的很多缺点，阶梯波的性能直接影响着系统的测量精度，本论文详细分析了一种高精度阶梯波生成方案，使得所需D／A的位数大大降低；本文还分析了A／D转换器对系统测量精度的影响，提出了一种A／D转换器位数较少的情况下提高系统测量精度的措施，同时又不会增加太多的系统成本。

A multiplayer chip LC resonator was fabricated using planar inductor and parallel plate capacitor. Because lumped inductor has small Q value and there is stray parameter effect in high permittivity substrate, the Q value of chip LC resonator is not high. Resonators based on λ/4 stripline with end short circuited were designed and fabricated. Input and output pads, coupled to the stripline using gap-coupling capacitor, are in the same layer with the center conductive strip. This new structure is very convenient for manufacturing in comparison with the conventional structure.

采用间隙电容耦合结构实现的谐振频率为1.8GHz四分之一波长终端短路带状线单端口谐振器的Q值最大值为225，谐振频率为1GHz双端口谐振器的Q值为83，谐振频率和Q值与耦合间隙、带状线的厚度和耦合引线长度有关；二分之一波长带状线谐振器的Q值和四分之一波长相比较尺寸较大，由于导电带较长，造成金属的损耗增加，从而导致谐振器的Q值较低；带状线结构的谐振器频率调节困难，本文提出了改变接地端的宽度实现谐振频率的微调方法，可实现频率调节量约1.5%。

When it is under certain perturbation, a quasi-elliptic response with transmission zeros to improve the transition can be obtained using the transmission zero technique given in the dissertation. Further, a multi-mode resonator composed of a half wavelength resonator loaded with two shunt series LC circuit is also investigated intensive.

本文提出了一种新型准集总元件谐振器，它既具有结构紧凑的优点，又能够引入传输零点构成准椭圆特性响应；本文也提出了一种由半波长传输线加入微扰构成的双模谐振器，并对它的传输零点技术做了全面系统的研究，这种双模谐振器相比传统的环形双模谐振器有更加紧凑的尺寸；本文提出了一种由半波长传输线加载并联串联LC电路构成的多模谐振器并对其在宽带滤波器的应用进行了研究；论文对一种复合谐振器及其在双通带滤波器设计中的应用进行了研究。

The present invention relates to a kind of tunable plasma resonant cavity for PCVD optical fiber perform rod processing machine. The tunable plasma resonant cavity includes cylindrical resonant cavity casing and cut-off waveguides set on two ends of the casing, and features the tuning piston, which is set on one end of the cylindrical resonant cavity and has middle part with through hole and back end stretched beyond the casing.

本发明涉及一种用于PCVD光纤预制棒加工机床的可调谐等离子体谐振腔，包括有圆柱型谐振腔壳体，在圆柱型谐振腔壳体的两端设置截止波导，其不同之处在于在圆柱型谐振腔腔体的一端安设调谐活塞，调谐活塞的中部开设通孔，后端延伸至圆柱型谐振腔壳体外端。

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。