During the near three decades, high - frequency ground wave radar detecting for sea has been regarded for its high performance by many countries.
近三十年来，高频地波对海探测雷达因其本身所特有的优点而引起了许多国家的高度重视。
In the same measuring point, the reduction effect to the noise with high frequency was significant near by the surface.
同一测点，不同高度时，近地面处高频交通噪声减弱效果明显；
The physical mechanism about reflection of low-emission glass in near-infrared region is explained by using plasma cut-off frequency theory.
利用等离子体截止波长理论，解释了低辐射玻璃红外反射的物理机制。
By inserting a slot at the edge of the rectangular slot on the ground plane and loading a C-shaped resonator near the microstrip line, dual band-notched characteristic at the central frequency at 3.
通过在地板上的矩形槽的边缘开槽和在馈线旁加载C形谐振器，该天线实现在中心频率3。
The patterns of near field and far field are compared through experiment. Considering the fact, an experiment is made on the testing error caused by distance error and frequency drift.
考虑到实际应用，对距离标定误差和频率漂移引起的测试误差进行了实验研究。
The simulation shows that the first mode frequency for performance is near 1000Hz, which is much lower than that of the second mode. The displacement of mirror is caused by the torsion of beam.
模拟结果表明，该微动作器的第一模态频率远低于第二模态，镜子的位移由梁的扭转引起。
The simulation shows that the first mode frequency for performance is near 1000Hz, which is much lower than that of the second mode. The displacement of mirror is caused by the torsion of beam.
模拟结果表明，该微动作器的第一模态频率远低于第二模态，镜子的位移由梁的扭转引起。
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