查询词典 frequency

The waves cause the tip to vibrate, and when the frequency of the incoming wave matches the resonance frequency of the tube, the device can convert the transmission into an audible signal.

电波引起末端振动，当接收的电波频率与管共振频率相配，该装置就能把波形转换成音频信号。

With the much application of multimedia technique,video frequency data and audio frequency data need to be processed.

随着多媒体技术的大量应用，需要对视频和音频数据进行处理，由于现实的网络状况难以满足较好的实时视频通讯的要求，因此对音频数据的处理就显得更加重要。

The difficult problem for complicated data mining need to be solved is telling from audio frequency and video frequency.

复杂数据挖掘要解决的难题就是音频和视频识别。

The characteristics of high frequency switch power supply are analyzed. The problems in its application on audio frequency power amplifier and the main methods to solve them are pointed out.

分析了高频开关电源的特点及将其应用到音频功率放大器中所遇到的主要问题，以及解决这些问题的基本方法。

Audio devices performances in playback are evaluated by their frequency response in the whole audio frequency range.

音频设备对于信号的重放能力是由其频率响应特性来衡量的。

The outlook of high frequency switch power supply in application to high fidelity audio frequency power amplifier is indicated.

指出了高频开关电源在高保真音频功率放大器中广阔的应用前景。

Audio frequency and video frequency compression technology, real-time data transmission technology and network technology make it impossible to achieve multimedia communication on IP network.

音频和视频压缩技术、实时数据传输技术及网络技术的成熟，使得在IP网络上实现多媒体通信成为可能。

Frequency range from audio, video, radio frequency to the microwave band.

频率范围由音频、视频、射频到微波波段。

Methods Pure-tone audiometry and statistical analysis of the hearing threshold of the speech frequency and high frequency were performed in 60～70 years old elders.

方法对 6 0～ 70岁有军事噪声暴露史的老年人 79例(15 8耳)及无军事噪声暴露史的老年人 36 4例(72 8耳)进行纯音测听，将言语听阈和高频听阈进行统计分析。

It locks the frequency of the carrier-wave at 35MHz.The stabilization of the carrier-wave can be 4×10-5,the accuracy can be 3×10-5.The frequency modulation and the confection of the carrier-wave are realized by the capacity-changing diode V149 and the integration voltage-control oscillator MC1648 chip.The end power amplifier uses the audion 2SC1970 to make it work in the third magnifying state,it improves the efficiency of the magnifier and the power of the output reaches the design demand.

发射部分采用锁相环式频率合成器技术， MC145152和MC12022芯片组成锁相环，将载波频率精确锁定在35MHz，输出载波的稳定度达到4×10-5，准确度达到3×10-5，由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制；末级功放选用三极管2SC1970，使其工作在丙类放大状态，提高了放大器的效率，输出功率达到设计要求。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"