In this paper, the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance.

本文首先根据多散射中心理论与局部谐振原理，建立了雷达目标在光学区阶梯频率波形激励下的响应方程。

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Models of acute crush injury of sciatic nerve in rabbits were established, and were (observed) by high-frequency ultrasonography 1, 2, 4 and 8 weeks respectively after damage.

建立兔坐骨神经急性挤压伤模型，损伤后第1、2、4、8周，分别应用高频超声在同一水平上观察双侧坐骨神经的变化。

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The topological optimization model of continuum structure that minimizes weight and subjects to static displacement and frequency constraints is established by ICM method.

用ICM方法建立了静位移及频率约束下、重量最小为目标的连续体结构拓扑优化模型。

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Its state-of-the-art radio frequency (RF) performance exceeds requirements established by EMVCo and the NFC Forum.

ENGADGET: Qualcomm announces cheap, battery efficient NFC chip, hopes to put it in phones next year

The account was established prior to the August 18th news but adopted a zanier tone and revved up the frequency of its tweets after the announcement.

FORBES: HP's webOS Drama Spawns Parody Twitter Accounts

And because fancy cars don't rent with the same frequency as mid-market ones, travelers can often find deals online, both with established agencies and lesser-known firms seeking a foothold in the market.

WSJ: The Rise of the Rent-a-Porsche