工作频率

叶簇穿透超宽带SAR工作频率分析与选择

Frequency Analysis and Selection of Penetrating Foliage UWB SAR

结与微波的耦合采用磁耦合方式，微波工作频率为x频带。

The magnetic coupling between the junction and the applied microwave was used in X band waveguide .

RFID系统常见的工作频率有低频、高频、超高频和微波。

RFID systems use low frequency , high frequency , ultra high frequency or microwave .

IGBT逆变技术、工作频率高、高效、低躁音。

IGBT inverter high inverter running frequency , high efficiency , low noise .

在DSP最高工作频率下，数据处理速率可达3MB/s，压缩比达32.4%。

When DSP works at the highest frequency , the data processing rate can reach 3MB / s and the compression ratio is 32.4 % .

为了更好地解决上述问题，应用BP神经网络方法，以保证工作频率稳定。

In order to solve the above problems efficiently a frequency stabilization system , based on the BP neural network method is presented in the paper .

CPU电源管理说明了如何调整处理器的工作频率，从而节省大部分能量而不会明显降低性能。

CPU Power Management shows how to adjust the processor 's frequency to save a maximum of energy without losing too much performance .

介绍了一种无碎屑、高亮度、高工作频率的气体靶激光等离子体软X射线源。

This paper describes a debris-free laser plasma soft X-ray source with a gas target , which has high operating frequency and can produce strong soft X-ray radiation .

声表面波（SAW）器件的工作频率随基片表面上的负载质量变化而发生漂移，通常利用这一性质作气相分析与检测，已经有了若干用SAW延迟线器件制成的化学传感器。

Surface Acoustic Wave ( SAW ) device responds to Changes in the mass on its Surface with a shift in frequency and is most frequently used in gas-phase sensing applications .

随着射频电路（RF）工作频率和集成度的提高，衬底材料对电路性能的影响越来越大。

With the improvement of the operation frequency and integration of radio frequency circuits , the impact of the substrate on the circuit performance is becoming more and more serious .

随着电器的小型化、高频化，工作频率已经进入到MHz、GHz频段。

Electrical applications have become smaller and smaller , utilizing higher and higher working frequency which now enters the range of MHz and GHz .

SOI集成电感相对于硅集成电感品质因数和工作频率都有大幅度的提高等。

The quality factor and the self-resonance of the inductor made on SOI can be improved relative to that of the inductor made on silicon .

于是，它们的工作频率是50Hz。

Hence , the working frequency of them is 50 Hz .

三是CCD摄像系统的成本问题，CCD的像点电荷都是以行为单位一步一步地转移到读出区的，这一个特征大大制约了CCD的工作频率。

Third is to decrease the cost of imaging system . For CCD imaging sensor , the electric charge move to reading area under line unit one by one that limit the working frequency .

传统TMD因其控制频率的单一性显然不能满足多工作频率的结构减振要求。

Because of the singleness of frequency control , the traditional TMD method obviously does not meet the vibration reduction requirements of the multi-frequency structure .

超大规模集成电路向着高集成度、片上系统（SOC）以及越来越高的工作频率的趋势发展，增加了对电路可靠性的关注。

Because of the development trend of very large scale integrated circuit which is higher integration , SOC and higher work frequency , people pay more attention to reliability of circuit .

遥感海洋表面动力学参数时，希望高频地波雷达的技术指标和参数可变，如工作频率、最大探测距离、距离分辨力，Doppler分辨率、相干积累时间等。

When it is used to extract ocean parameters , we hope the working parameters of radar are flexible , such as working frequency , the most detecting distance , range resolution and Doppler frequency resolution , etc.

为了实现较高的效率，设计的DC-DC变换器是一款基于PWM（Pulsewidthmodulation）控制方式的开关电源式升压变换器，采用电压控制模式，工作频率可以调整。

To achieve the high efficiency , it was a PWM ( Pulse Width Modulation ) based Boost converter , using voltage control mode and the switching frequency could be adjusted basing on the application requirement .

结果表明：雷达工作频率、带宽以及路径电子总量（TEC）是影响成像质量的决定因素。

The results show that the crucial factors for imaging quality are carrier frequency , band width and TEC ( total electron content ) .

针对两相无阀脉冲爆震发动机（PDE），研究了点火能量、工作频率、发动机直径、进气方式和燃料种类等对PDE点火-起爆性能的影响。

The ignition-detonation performance of two-phase valveless pulse detonation engines ( PDEs ) with the inner diameters of50 mm and120 mm in different operation cases was investigated .

提出了一种基于直接数字合成（DDS）技术的锁定放大电路设计。该电路工作频率可在0~1.25MHz范围内调整，并具有自动相位跟踪的特点。

Based on Direct Digital Synthesis ( DDS ) technique , a lock-in amplification circuit was designed with programmable working frequency between 0 and 1.25 MHz and automatic phase tracing ability .

硬件系统设计，完成对雷达测速仪基带处理单元的设计，包括A/D转换器的选择，确定DSP芯片及其外围电路的工作频率元器件的选择，硬件连接电路的设计，工作方式设置等。

Hardware system design is to complete the baseband processor unit design of radar system , including choosing the A / D converter , determining the DSP chip and its peripheral circuit operating frequency , connections of DSP and MCU .

常规的PWM逆变电路，电力电子开关器件在大电压下导通，大电流下关断，处于强迫开关过程，因而存在开关损耗大，工作频率低、体积大及电磁干扰严重等缺点。

The switch devices in the conventional PWM inverter turn on with high voltage and turn off with heavy current . It results in more consumed power , low frequency , and large volume , severe EMI etc.

为了给显示板提供正负电源，采用了多相DC-DC转换器结构，同时减小了充电泵的工作频率。

We have adopted a multi-phase DC-DC converter structure to supply the positive and negative voltage source for the panel , and decreased the operational frequency of the charge pump .

从微带线的等效分布电感电容出发，结合模拟和试验结果以及滤波器结构参数对滤波特性的影响，提出该滤波器的等效LC电路模型以及计算中心工作频率的经验公式。

Meanwhile , based on the equivalent capacitance and inductance of microstrip lines , the equivalent LC circuit and approach formula for center frequency have been obtained by means of simulation and experiment results .

分析了激励频率和外加磁场变化对磁阻抗的影响，结果显示，Co基非晶丝的GMI效应在高频的表现优于低频，在其实际应用中，工作频率应在高频。

The result shows that Co-based amorphous wires exhibit better GMI effect at high frequency than at lower frequency . Therefore , in its practical application the operating frequency should be high .

目前，器件特征尺寸已经接近纳米级，电路工作频率已经进入GHz时代，专用集成电路的集成度已经超过千万门晶体管规模[1]。

The feature dimension of device approached to nanometer level , the working frequency of circuit entered GHz times and the integration level of ASIC exceeded ten million gate transistor dimensions .

采用0.35μMCMOS工艺参数进行仿真，结果表明，在3.3V电源电压下其工作频率可达4.1GHz。

The simulation results in 0.35 μ m CMOS process show that the maximum input frequency is 4.1 GHz at the power supply of 3.3 V.

根据变截面杆纵向振动的波动方程，推导了余弦形变幅杆的频率方程和重要参数的计算公式.用数学软件Matlab设计了同工作频率、不同面积比的余弦形变幅杆；

Based on the wave equation of longitudinal vibration of variable cross-session rod , the frequency equation and parameter formula of cosine horn are educed , the cosine horn with same frequency and different area ratio is designed by using Matlab language .

这些移动通信系统的工作频率都已达到或超过1GHz。

The operation frequency of these wireless systems has been up to 1 GHz .