查询词典 frequency

Keyboard function set through waveform type,frequency,amplitude,duty cycle,and other parameters of a signal to the microprocessor 89C51 control,MAX038 generated by the various signals,In this process,four-channel signal through D/A converters have simulated voltage and current,It transported up through the analog signal amplification,it enters the frequency MAX038 coarse-IIN,fine-tuning FADJ end,the duty cycle control-DADJ. In its COSC port received a three relays and oscillation frequency capacitance as a choice.

通过键盘设定函数波形种类、频率、幅度、占空比等参数的一个信号进入单片机89C51控制，由MAX038产生各种波形信号，在此过程中信号通过四通道D/A转换器产生模拟电压和电流，它再通过运放将模拟的信号放大，它进入MAX038的频率粗调端IIN、微调端FADJ、占空比控制端DADJ、在它的COSC端口接一个继电器和三个振荡电容作为频率选择。

In this paper, based on the frequency-domain processing model of the multi-polarization, low frequency UWB SAR system, with the consideration of the low frequency UWB electromagnetic scattering characteristics of the calibrators, the polarimetric calibration method is proposed.

该文基于多极化低频UWB SAR频域处理模型，考虑了极化校准中定标体的低频超宽带电磁散射特性的问题，给出了极化校准方法。

The three-dimensional models are successfully imported to ADAMS software through the special interface MECH/PRO, and then the virtual prototype models are founded by toolbox of ADAMS to apply forces and constraints to the parts of the models. The dynamic simulation of the multi-rigid-body rifle model is carried out under the condition of the single shoot by the low firing frequency, high firing frequency and superhigh firing frequency when the rifle model is fixed on the ground, then the dynamic simulation of the multi-rigid-body man-weapon system is operated under the conditions of single and repeating shoots.

通过Pro／E和ADAMS的接口MECH／PRO将三维实体模型顺利导入ADAMS中，并对高频点射步枪和人枪系统施加约束和力，建立高频点射步枪和人枪系统的虚拟样机模型，并且对高频点射步枪及人枪系统进行了较为系统的多刚体系统动力学分析和研究，分别对高频点射步枪固定状态下次高频、高频和超高频点射过程进行了多刚体系统动力学的仿真，在此基础上对高频点射步枪人枪系统点射和连发进行了仿真。

RF modules covering GSM, CDMA, TD-SCDMA, WCDMA, WLAN and Wimax wireless communications systems, active modules include power and frequency of the linear power amplifier, transceiver components, modules and integration of selected frequency modules, Passive radio frequency modules, including various types of filters, diplexers, a road, splitters and couplers; wireless network optimization campaign整机including PHS, GSM, CDMA, TD-SCDMA and WCDMA straight-machine, RF Rafah Yuan and indoor distribution systems, digital television, including digital TV mobile wireless transceiver modules, wireless transponders, digital mobile TV repeater, and so on.

射频模块涵盖了GSM、CDMA、TD-SCDMA、WCDMA、WLAN和Wimax等无线通信系统，有源模块包括各种功率和频率的线性功率放大器、收发组件、选频模块和一体化模块等，无源射频模块包括各类滤波器、双工器、合路器、功分器和耦合器等；无线网络优化系列整机包括PHS、GSM、CDMA、TD-SCDMA和WCDMA直放机、射频拉远和室内分布系统等；数字移动电视包括数字电视无线收发模块、无线转发器、数字移动电视直放站等。

Pitch frequency by the sound level of the object decision, high frequency sound on the high, low frequency sound is low, the existing international standard pitch was in May 1939 in London by the International Standards Association of a1 = 440 Hz.

音高是由发音物体振动频率的高低决定的，频率高声音就高，频率低声音就低，现行的国际标准音高为1939年5月国际标准协会在伦敦通过的a1＝440赫兹。

Each House Detective installation kit comes with three primary test instruments; a frequency agile signal level meter, a frequency agile radio frequency leakage detector, and a zero foot dead zone time-domain reflectometer; all three housed together in a durable hard case.

每家侦探安装套件具有三个主要的测试仪器，一个频率捷变信号电平表，一个频率捷变射频泄漏探测器和一个零脚死区时域反射计；所有三个关在同一个持久的疑难案件。

Using upper sideband also allow the actual carrier frequency to be determined easily simply by adding the dial frequency to the audio modulation frequency.

使用上边带还允许实际载波频率确定仅仅通过增加拨号频率的音频调制频率容易。

After transverse Zeeman effect is introduced to reduce the mode coupling, the laser could produce two orthogonal linear polarized components with 5MHz beat frequency. The effect of the magnetic field's direction to generation of the dualfrequency and the polarization property of the laser is investigated Based on theoretical study and experimental investigation to the beat frequency tuning character, a novel method for stabilizing the laser beat frequency is brought forward.

现代机械工业的发展使得机床、三坐标测量机等的运行速度已提高至1m/s，为适应这种发展趋势，本文研究了高频差（5MHz）激光干涉仪的光源、稳频和外差信号的处理等基本问题，建立了测量速度可达1m/s的高测速激光干涉仪，并对其在加工中心主轴热漂移测量系统和加工中心误差实时测量系统中的应用进行了研究。

We add a frequency compensation loop in an all digital CDR. This frequency compensation technique compensate large frequency variation in spread spectrum data.

在一全数位化的时脉与资料回复电路中，加上另一回路，以补偿在展频技术下产生的较大的频率变动。

The traditional frequency only shows the status in the past so we have advanced the absolute frequency.

由于传统的使用频率是代表过去一段时间内对象被使用情况，因此我们引入了相对使用频率和绝对使用频率。

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。"