查询词典 frequency

Based on seismic section explanation of thousands of kilometers, the authors selected 4 seismic parameters (frequency, swing, continuity and inner reflect configuration), adopted multiple nomenclative principle of seismic facies of "figure+configuration+swing+frequency+continuity" and generalized 10 seismic and 5 sedimentary facies for the northern sag of South Yellow Sea Basin.

在数千公里地震剖面解释基础上，选用频率、振幅、连续性及内部反射结构等4个地震参数，采用&构形+结构+振幅+频率+连续性&的地震相复合命名原则，总结出南黄海盆地北部坳陷白垩系近10种地震相单元，5种沈积相类型。

Noncoherent space-frequency coding in MIMO-OFDM is an important method to obtain space and frequency diversity in the absence of channel state information.

非相干空频编码是在无法得到精确信道信息的情况下获取MIMO-OFDM系统中空间分集和频率分集的重要手段，而目前非相干空频码的研究还是将整个OFDM符号看作是一个码字，这样大大增加了系统的编译码复杂度。

Up to now, the performance analysis of noncoherent space-frequency coding whose receiver does not know the channel state information and the methods to reduce the encoding-decoding complexity have not been solved, and this has constituted a bottleneck of the research of noncoherent space-frequency coding.

非相干空频码具有接收端不需要知道信道信息的特点，而到目前为止，针对非相干空频码的性能分析和如何降低编译码复杂度的问题还没有得到很好的解决，这些问题已成为研究非相干空频码的瓶颈。

To reduce the receiver complexity,a differential space-frequency transmit diversity scheme was developed with a noncoherent detection method based on the frame structure of the time domain synchronous-orthogonal frequency division multiplexing system.

在采用相干检测方法的发射分集方案中，进行信道估计需要付出很高的代价，为了降低接收端的实现复杂度，根据时域同步正交频分复用系统结构的特点，提出了差分空频发射分集及相应的非相干检测方法。

In the buckling question under nonconservation force,a simply example( the dynamic stability question under the uniformly follower forces with small deformation % linear elastic, straight normal.) is considered.The variational equation of braid composite cylindrical shells subjectd to uniformly follower forces is deduced based on the variation principle of quasinatural frequency of elastic nonconservative system self-excited vibration.The calculated formulas of the flutter load and quasinatural frequency of shells are obtained. The program for calculating the flutter load is developed.The numerical example is given and some useful conclusions are obtained.

对非保守力作用下的屈曲问题，具体研究了圆柱壳在比较简单的情况，即小变形、线弹性、直法线假设下在随动力作用下的壳屈曲问题，由拟固有频率变分原理推出了圆柱壳受随从力作用的变分方程，得到了颤振载荷与壳弯曲的固有频率的计算公式，编制了相应的计算机程序，并给出了具体算例，得到了一些有益的结论。

Second, all the compounds generate large nonresonant optical nonlinearities over a wide frequency zone, which can be used for a frequency conversion optical material.

此类体系在较大的宽频区表现出较小的色散行为，它们可以用于频率转换材料。

As a result of the frequency conversion electrical machinery particularity, uses the junction to hand over the frequency changer power supply the electrical power system, caused the electric current and the voltage waveform has the distortion, the profile turned the nonsine wave by the original sine wave.

由于变频电机的特殊性，采用交交变频器供电的电源系统，使得电流和电压波形发生了畸变，波形由原来的正弦波变成非正弦波。

At last, the proposed algorithm is simulated under such conditions as sinusoidal voltage, nonsinusoidal voltage, frequency fluctuation, sampling frequency and sampling time length in change.

最后分别在电压无畸变、电压含谐波、电压频率波动、采样频率以及采样时间长度变化时，对文中提出的介损测量正交分解法进行仿真验证，并与谐波分析法进行比较分析。

Photonic quantum-well structures can be constructed by stacking 3 photonic crystals with the same photonic band gap and different defect modes. On condition that the defect mode of the PC in the well region is located into nontransmission frequency ranges of the PCs in the barrier regions, the confined photonic state appears and can completely transmit through the structure by tunneling. However, its transmission will be strongly prohibited due to vanishing of the photonic QW induced by shifting the defect mode frequency of either of the PCs in the surrounded regions to that of the middle PC.

把三块各带有一个缺陷的光子晶体结合起来，如果中央晶体的缺陷模处在两侧晶体的禁带中，缺陷模内的光波会受到两侧晶体的阻碍并被局域在中央晶体内，形成量子阱结构；若一侧晶体的缺陷模被移动到中央晶体缺陷模处，则只有一侧晶体阻碍在中央晶体缺陷模内传播的光波，量子阱效应完全消失，光的传输受到最大程度的阻碍。

Frequency modulation; frequency processing; echolocating; odontocete cetaceans; ultrasound; bioacoustics; sound localization; midbrain; binaural; mesencephalon; auditory cortex; clicks; auditory evoked potentials; inferior colliculus; superior colliculus

调频；频率处理；凭回声定位的方向；odontocete cetaceans；超声；生物声学；声源测定；中脑；两耳的；中脑；听觉皮层；棘爪；听觉诱发电位；下丘；上丘

Some questions asked by the adjudicators in one English Speaking Contest still run upon me very often.

我参加了一场以"我心中的奥运会"为主题的英语演讲竞赛，其间评判提的几个问题时时萦绕我的心头。

He called InTERActive our most profitable release of the year.

他呼吁互动的我们的最有利可图的释放一年。