查询词典 medium frequency

The angular distribution of the bistaticscattering coefficient of HH polarization were obtained by numerical implementation. Influences of the permittivity and the mean layer thickness of intermediate medium, friction velocity and the frequency of the incident wave on the bistatic scattering coefficient were discussed. The basic characteristics, the zonal characteristics and the characteristics with varying of frequency of the scattering coefficient from stratified sea surface were obtained. The numerical results show that the scattering coefficient has approximate "quantization" characteristics.

通过数值计算得到了HH 极化双站散射系数随散射角的变化曲线，讨论了中间介质介电常数和厚度、摩擦风速和入射波频率对双站散射系数的影响，得到改进的一维分形分层海面散射系数的基本特征、分区特征和随频率变化的特征，结果表明散射系数近似具有"量子化"特征。

The following are the expressionsfor the mean pressure set up at the detection plate and for the time of the signal toprogagate from the radiator to the detector:这里是1个公式,省略） where Re is the real part of the expression appearing within the braces, 0 is the density ofthe medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in themedium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel andthe axis of the tube, r = vro/c, v is the flow speed of the fluid, d is thediameter of the pipe, m is the circular frequency, k is the wave number,where a is the radius of the plate (this is taken as the same for the emitting and receivingplates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, andThe triple sums in the expressions for N~ and N2 may be neglected if the flow speed islow, since the contributions for these become negligible.

以下是表达式平均压力为定于检测板和为信号时间progagate从散热器到探测器：（这里是1个公式，省略）假如再是出现在大括号表达式的实部，0是密度中期，沃是速度的振动幅度，C是健全的速度中，D2中=我+的导向8，z是对之间的距离发射与接收板，B是声之间的通道轴角该管的轴，R =中心内大多分为/荤，v是流体的流动速度，，D是管道直径，m是圆频率，k是波数，的其中一盘是半径（这是为重点，同样的发射与接收为le简单板，但没有讨论板的困难，在半径不同毫克），，是发光板振动频率，和在N的表达式的三重总结和N2可以忽略，如果流速低，因为这些变得微不足道的贡献。

Based on the theory of medium polarization, the dielectric properties of the mixture of oil and water researched, it is found that the best frequency for measuring dielectric constant of the oil-water mixture ranges between 10〓—— 10〓Hz considering medium polarization, EM wave modes, circuit simplification and so on.

本文的主要研究内容和研究成果如下：(1)根据介质极化理论，通过对油水混合介质的介电特性的研究，结合介质极化、电磁波的模式以及简化实现电路等因素，提出了测量油水混合介质介电常数的最佳工作频率在10〓～10〓Hz之间。

When the microspores were cultured in the medium with 16% sucrose for 3 days, and then added an equal volume of medium with 13% sucrose, the embryoid induction frequency was enhanced greatly, up to 3.7 times of that cultured all time in the medium with 13% sugar.

如果在16%蔗糖培养基中培养3天后，添加等体积的13%蔗糖培养基，能够大大提高胚状体的诱导频率，为仅用13%蔗糖培养基培养的3.7倍。

Plasma is a dispersive medium and its equivalent refractive index is related to the frequency of the incident electromagnatic wave and the plasma frequency, so it is feasible to shift the syntonic frequency of plasma defect by changing the plasma parameters, which behaves as a tunable filter.

据等离子体的强色散特性，其等效折射率与电磁波频率及等离子体频率等参数有关，因而可以通过改变等离子参数，使一维微波光子晶体缺陷层的谐振频率发生偏移，实现微波光子晶体的可调谐滤波特性。

The structure parameters of the component are further varied, to obtain multivarious frequency components. The resonance frequency of a component is reduced by filling high permittivity medium, and this makes it possible to keep the design of a component compact at low frequency even.

进一步改变结构参数，可获取不同谐振频率的器件，且可在腔体中填充高介电常数介质来减小器件的谐振频率，克服了以往使用腔体结构在低频段时体积过大等问题。

In conventional seismic data processing, the earth is regarded as prefectly elastic medium.However,the pores of stratum rock often contain fluid. So, when the seismic wave propagates in it, there are energy attenuation and phase distortion related to frequency. Moreover, the attenuation, scattering,and dispersion of high-frequency components are far higher than that of low-frequency components.

常规地震资料处理中把大地看成是完全弹性介质，实际上，地层岩石孔隙中常常含有流体，当地震波在其中传播时要发生与频率相关的能量衰减和相位畸变，且高频成分的衰减、散射和弥散远高于低频成分。

Assume that medium A has an audience of 100.000persons and medium B, 90.000, if 40.000 of the persons exposed to medium B are also members of A' s audience, then buying the two media yields an unduplicated audience of 150.000---not 190.000, duplication leads to frequency, which is the number of times the target audience is exposed to a message within a given tome period--- usually four weeks.

假定一个具有中等及中等100.000persons观众乙、90.000、如果人接触了40.000乙同属一个中型的观众然后买了两产量媒体地表观众---不150.000190.000，导致重复频率这是多少次接触对象是一个特定的讯息--通常四星期内托。

Results indicated there were significant seasonal and spatial distribution characteristics. Drought occurred in high frequency at the stage of tasselling to silking and thereafter. Drought frequency obviously increased with backwards shift of growth stage. Light drought happened in higher frequency than medium and severe drought.

结果表明，湖南春玉米生长季节内干旱呈现明显的季节性和空间区域分布特征：干旱频率较高的时段主要在玉米抽雄－吐丝阶段及其后的生育阶段，且随生育期后移干旱频率明显增加，以轻旱程度为主。

The invention is a method for designing and preparing binary reinforced damping magnesium alloy having medium rigidity, medium strength, high-medium damping and medium raw material cost, the prepared alloy is beneficial for balancing required elements in practical application, including optimized rigid, wide frequency band, wide strain amplitude, wide temperature zone, strength, enough high-temperature-resistance, creep resistance, toughness, price, anticorrosion treatment and heat processing, and is beneficial for solving the problems in industry, such as lacking of variety of damping magnesium base alloy, selecting and using of rare-earth resource or drawback of substitution.

设计和制备中等刚度、中等强度、上中等阻尼性能和中等原料成本的二元增强阻尼镁基合金的方法，得到的该合金有利于平衡优化刚度、宽频段、宽的应变振幅、宽温度区间、强度、足够耐高温、抗蠕变、韧性、价格、利于防腐处理和利于热加工等实际应用中需求的要素，利于解决工业上可供选择的阻尼镁基合金品种不多以及稀土资源选择利用或替代利用性不足的问题。

Graf, without question, is the greatest women's player in history.

格拉芙，现在，毫无疑问是女子网坛历史上最伟大的选手。

If not, you will have to look around at all your important data.

如果没有，您将需要检查所有的重要数据。