查询词典 resonance cavity

The influence on absorption coefficient brought from shape choice with cylindrical or cone-shaped cavity, square or hexagonal profile, from different closure as air or water, from different material properties and structure sizes, are analyzed based on the numerical calculations. Some general characteristics are summarized. It shows that lowest resonance frequency of sound absorbent coefficient is inversely proportional to volume of cavity and sound absorbent coefficient is proportional to perforated percentage.

2通过数值方法研究了吸声结构内腔为圆柱腔和圆锥腔、基材的剖面形状为正四边形和正六边形、不同背衬、基材材料特性、尺寸大小对整体吸声效果的影响，总结了这些情况下非旋转对称吸声结构的声学特性变化规律，得出腔体体积越大，吸声系数最低共振频率越低；穿孔率越大，吸声系数越大的结论。

The resonance property of the pair of left-handed metamaterial and negative permittivity medium is analyzed in depth, and the results are applied to the design of an improved miniaturized cavity resonator.

通过探讨双负介质与负介电常数介质交叠结构的谐振特性，实现了一种能够同时缩小长度和宽度的改进的小型化谐振腔。

The lock in effect and threshold expressions caused by backscattering from cavity mirrors in a passive resonator gyroscopy are derived based on the resonance characteristics of cavity .

从谐振腔的谐振特性出发，严格地推导出无源谐振腔激光陀螺中由腔镜背散射引起的闭锁效应关系式及闭锁阈值表达式。

According to the frequency formulae of the two kinds of oscillations, the relation between depth of cavity and speed of flow for cylindrical cavity is derived, when the coupling resonance condition is satisfied.

根据文中得到的两种振荡的频率公式，还导出了圆柱形腔满足耦合共振条件时腔深和流速之间的关系。

According to condition of phase resonance of fiber grating F-P cavity, the relationship between fiber Bragg grating period and cavity length for fiber grating F-P cavity has been deduced, which provide a basis for the manufacture of the F-P filter based on fiber Bragg grating.

根据光纤Bragg光栅F-P腔的相位谐振条件，推导了光纤光栅F-P腔的腔长与光纤Bragg光栅常数之间的关系，从而为研制基于光纤Bragg光栅的F-P滤波器提供了依据。

We calculated resonance spectrum and resonance mode profiles of the DQPC twin and triple-cavity by 3D finite-difference time-domain method.

利用三维有限时域差分法我们可以计算准光子晶体二重以及三重共振腔中的共振场图和模态图。

The resonance in the sinus cavity is the highest location for resonance in the human body.

头腔共鸣是人体内部最高位置的共鸣，它能把整个声区的声音统一到高位置上，让声音产生出色彩和穿透力。

It is because through the apertures the exterior electromagnetic field will couple with the cavity, and excite resonance in the cavity.

甚至在空腔中特定位置有著比无屏蔽时更大的场，对於封装内的电路构成额外的干扰。

Results show that the modification effect is better when the sample is at 120 mm away from the resonance cavity＂ than that at 80 mm.

试验结果表明：试件距反应腔120mm时处理效果略好于试件距反应腔80mm时的效果，短时间微波等离子处理即可降低柚木表面接触角，提高表面自由能。

Not only that, in China, the United States through the sound of singing the national or through the same Nationalization of the Bel Canto won the people's acceptance and love, in concert, stressed respiratory depth, the smooth voice, chest, oropharyngeal cavity, the first cavity resonance mixed Use, and the atmosphere of confrontation and support highs to close or cover up the use of methods to find the best conversion after the treble, and so on, are made consistent with the requirements of Bel Canto, but certain requirements such as the transport chamber music and highlight areas The national style and characteristics, make it more Singing the national flavor, and this is the U.S.

不仅如此，在我国，通过美声化的民族唱法或通过民族化的美声唱法同样赢得了人们的认同和喜爱，在演唱时强调呼吸深度、声音的通畅，胸腔、口咽腔、头腔共鸣的混合使用，气息的支持与对抗以及高音区运用关闭或掩盖的方法来找到转换之后的最佳高音等方面，均作出了与美声唱法一致的要求，但某些要求如旋律的运腔等方面又突出了民族的风格与特色，使之更具民族唱法的韵味，这便是美声化的民族唱法。

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。