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1·Maximum observed frequency in HF backscatter ionogram and day variblelaw of slope distance.

高频返回散射电离图中最高观测频率、斜距的日变化规律；

2·Simultaneously, a migration imaging technique using the whole MT observed frequency bands information was realized.

同时实现了可包含所有观测频率信息的全频段MT偏移成像技术。

3·When biologists say that they have observed evolution, they mean that they have detected a change in the frequency of genes in a population.

当生物学家说他们观察到进化时，意思是他们发现了一个种群中基因频率的变化。

4·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。

5·The phenomena of ice-induced steady state vibration and frequency lock-in between ice force and response were observed on offshore platform.

在海洋平台上观测到了冰致结构的稳态振动，以及冰力和平台响应问的频率锁定现象。

6·This paper points out that the first-order perturbation photon flux produced by this system has not observed effect when GWs is different from frequency of Gaussian beam.

笔者指出，当入射引力波和高斯束不同频率时，高斯束谐振系统产生的一阶扰动光子流没有观测效应。

7·Based on observed signals analysis and comparison in time - domain and frequency -domain, the method of distinguishing interfere signals and abnormal electromagnetic radiation signals is given.

基于对观测信号的时域、频域分析的比较，给出了干扰信号与异常电磁辐射信号的判别方法。

8·Methods: the effect of gi on frequency of angina attacks, ECG, nitric oxide (NO) and endothelin (et) were observed and contrasted with that of nitroglycerin.

方法选择硝酸甘油针剂作对照，观察其对心绞痛发作频率、心电图、一氧化氮(NO)及内皮素(et)的影响。

9·Utilizing the information observed, a new type of slip frequency controlled torque-speed double closed loop system is developed.

基于观测出的状态信息，构成了转差频率控制的转矩速度双闭环新型变频调速系统。

10·The frequency locking, frequency jump between neighboring modes and the hysteresis phenomenon are observed.

观察到锁频，相邻模式间的频率跳变及滞后等现象。