频率

Paired t-test analysis was performed on the thresholds of SVR and PTA at each frequency (0.5, 1, 2 and 4kHz), and analysis of variance was performed on the difference between the pure tone audiometry threshold and the evoked potential threshold among different frequency.

对听力正常的46名志愿者，分别对双耳进行0.125~8kHz频率范围内的PTA阈值及0.5~4kHz频率范围内的SVR反应阈测试，通过配对t检验比较0.5、1，2、4kHz频率范围的SVR反应阈与PTA阈值的差异，并运用方差分析比较不同频率间的SVR反应阈与PTA阈值差值的差异。

The result indicated that frequency of fish-shaped cable truss support system would decrease, resulting in increase of temperature.

算例表明，预应力鱼腹式索桁架支承体系固有频率随着温度的升高而减小，具有较强的非线性，其自振频率随着振幅发生变化，其非线性振动呈现&硬弹簧&特性，非线性自振频率高于线性振动频率。

For frequency information fluid identification technology:the basic theory of fluid identification based on frequency information has been introduced,for inner and external factor affecting frequency,some steps have been proposed to attain reserved amplitude and frequency analysis data with high resolution,high S/N ratio;through the comparison of time-frequency analysis method, the high accuracy time-frequency analysis method has been selected to extract time-frequency attributes;the analysis method flow of common single frequency fluid identification has been proposed,according to the data of full frequency band,several anomaly zone modes of common single frequency attribute have segregated; incorporating converted wave and compression wave,fluid identification method based on PS wave combined time-frequency analysis has been proposed;the AVO property of various fluid type in frequency domain has been studied;the generalized fourier analysis method,Proni absorption filter has been introduced,and researched for anti-noise and for the seismic processing interpretation flow.The above technology have been applied to fluid identification of organic reef in WBT area in the east of Sichuan and fluid identification of clastic rock in GUANGAN area in the middle of Sichuan,the results show that the above methods are effective.

基于频率信息的流体识别技术方面：介绍了利用频率信息流体识别的基本理论，针对影响频率的内、外在因素，提出一些针对措施，以获得高分辨率、高信噪比的保幅、保频分析数据；通过时频分析方法的比较，选取高精度的时频分析方法提取时频属性；提出共单频属性进行流体识别的分析方法流程，结合全频带数据，分出几种共单频属性异常带模式；联合转换波资料和纵波资料，提出基于纵横波联合时频分析进行流体识别方法；研究了频率域内不同流体类型AVO现象；引进一种广义傅立叶分析方法：Proni吸收滤波，研究其抗噪性以及进行地震处理解释的流程；将这些技术应用川东北五百梯区块进行生物礁储层流体的识别和川中广安陆相碎屑岩的流体识别，取得较好的效果。

This invention utilizes multiplier frequency of picture frequency to reduce the interference between picture frequency, to recognise the warp of the inverter switch frequency and to ensure this warp.

本发明利用图像频率的倍增频率，一方面减少与图像频率间的干扰，另一方面识别反相器开关频率的偏差，并保障其偏差。

Frequency regulation is a measure that states the difference between no-load and full-load frequency as a percentage of full -load frequency.

频率调整率频率调整率是指空载和满载之间频率的差别与满载频率的百分比。

Frequency Regulation Frequency regulation is a measure that states the difference between no-load and full-load frequency as a percentage of full-load frequency.

频率调整率频率调整率是指空载和满载之间频率的差别与满载频率的百分比。

Thus, the neurons with sharp frequency tuning and high Q 10 -dB values showed that there was certain relationship between echolocation call and frequency tuning of IC neurons in the leaf-nosed bats.

结果表明，大蹄蝠回声定位信号与下丘神经元频率调谐存在相关性，表现为最佳频率在回声定位信号主频附近的神经元频率调谐曲线的Q10-dB值较大，具有很强的频率分析能力。

The results showed that the echolocation calls of the leaf-nosed bats were constant frequency-frequency modulation signals with 2-3 harmonics and the second one among these three harmonics was its dominant frequency. The constant frequency components of three harmonics (Mean±SD, n=18 ) were 33.3±0.2 kHz, 66.5±0.3 kHz, and 99.4±0.5 kHz, respectively. In examined FTCs of 72 IC neurons, their Q 10 -dB values ranged from 0.5 to 95.4 (9.2±14.6) and the neurons whose best frequency around the dominant frequency had sharp frequency tuning.

结果发现，大蹄蝠回声定位叫声为恒频-调频(constant frequency-frequency modulated，CF-FM)信号，一般含有2~3个谐波，第二谐波为其主频，CF成分频率(Mean±SD，n=18)依次为：(33.3±0.2)、(66.5±0.3)、(99.4±0.5)kHz；电生理实验共获得72个神经元的频率调谐曲线，Q10-dB值的范围是0.5~95.4(9.2±14.6， n=72)，最佳频率(best frequency，BF)在回声定位主频附近的神经元具有尖锐的频率调谐特性。

The effects of frequency veering features on mode localization of the mistuned system were analyzed with L. It is shown that the distance between the frequency veering curves at nodal diameters is a key parameter, and it exists a minimum value for the parameter, around which blade modes are very sensitive to mistuning, and can result in dramatic fluctuation of the mode localization degree.

研究表明，频率转向曲线之间关于节径的最小间隙是反映频率转向特征的重要参数，并存在一个转向频率间隙的极小值点，在该极值点附近，频率转向区内的模态对叶片失谐非常敏感，并会导致模态局部化程度剧烈变化。

The mathematical relation formula is derived from the train running speed,distance and the output voltage frequency of tacho generator.

推导了列车运行速度、走行距离与测速发电机输出电压频率的数学关系式，给出了利用CMOS数字集成电路和频率合成原理实现上述关系的电路框图，并对其速度接口电路、轮径输入方法及频率合成电路、分频电路和BCD比例乘法器电路、显示电路、基准频率发生电路、电源电路等作了分析与说明。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。