Using 8253 and 8255 sent out the sound with fixed frequency.

并利用8253定时器和8255可编程控制器发出了指定频率的声音。

With fixed frequency control circuit, it provides with over voltage, over current, overheat and short circuit protection.

该系列电源适配器，采用固定频率控制电路，具备限流、限压、过温、短路全功能保护。

But Steady low fan speed change, so that airflow and vibration according to a fixed frequency, so we might as natural wind moderate.

但稳定低风扇速度变化，使气流和振动按固定频率，因此我们可能是自然风温和。

With the drastic frequency competition of communication, the usual communications with fixed frequency suffer from a serious threat.

随着通信领域的频率竞争愈演愈烈，惯用的定频通信受到了严重威胁。

The fixed frequency sample PWM method is put forward in this paper together with the theoretical analysis about their switch strategy.

本文提出恒频采样电流跟踪型PWM方式，并对其开关策略进行了理论分析。

The virtual signal generator has 12-channels outputs for linear scanning frequency signal or fixed frequency sine wave excitation signal.

该发生器可以输出相位差可调的12通道线性扫频正弦激励信号或者输出12通道定频正弦激励信号。

This approach the problem of conquers phase excursion and frequency drift that anciently adopts fixed frequency filter and its frame is simple.

这种方法克服了以往采用固定频率滤波器带来的相移和频率漂移问题，而且结构简单。

Through adding varactors, a new structure is introduced and it realizes controllable wave-beam of fixed frequency which is better for practical use.

文章提出一种新型结构，通过加入变容二极管，实现了在固定频点上波束可控，更适于实际应用。

The transmitting rate of the system varies in period for the fixed frequency lying in the pass band when the thickness of media continuously increases.

对于通带中的固定频率，透射率随介质厚度的增加呈周期性变化。

Through a new feeding construction with phase-shifter, the main lobe of the pattern of the microstrip leaky-wave antenna can scan at a fixed frequency.

通过控制微带漏波天线中部馈电端口移相器，成功实现了工作频率固定下微带漏波天线主波束扫描，并使用电子开关实现微带漏波天线主波束双向扫描。

This platform can simulate the ray tracing for a fixed frequency or sweeping frequencies, also can calculate the group path and the covered region of rays.

该平台可实现定频或扫频射线轨迹演示，计算各射线群路径，覆盖区域等功能。

Besides switching at a fixed frequency for Flyback converters, quasi-resonant mode is widely used due to its lower switch-on losses and better EMI performance.

除了工作在固定的开关频率模式外，由于更小的开通损耗和更好的EMI性能，准谐振工作模式在反激式变换器中得到较广泛的应用。

Real-time timing or fixed times downtime, boot maintain current status, The whole timing or fixed frequency tracking open action if they are qualified, Print the test report.

实时定时或定次数停机，开机保持当前状态；全程定时或定次数跟踪开启动作是否合格；打印检测报告。

Most electrical devices requiring a fixed frequency, electric power control requirements to reduce the adverse effects of nets, these factors need to use active control to control wind turbine.

大多数电气设备要求有固定频率的电源，电力控制要求减少风力发电并网时的不利影响，这些因素都需要使用主动控制的风电机组。

For fixed damping and fixed excited frequency the motion of the beam under small amplitude of force is periodic, but becomes chaotic through period doubling bifurcation with increase of the force.

对固定的参数激励频率和阻尼，当参数激励幅值较小时梁的运动是周期的，但大幅值激励会使运动通过倍周期分岔变为混沌。

In this paper a new torque controller with fixed switching frequency is proposed.

文中提出了一种新型的开关频率固定的转矩控制器。

It features in low torque ripple, low flux ripple and fixed switching frequency.

它具有开关频率恒定，转矩和磁链波动小等特点。

Stereo channels are configured in the same way, but with a fixed-frequency 4-band eq (blue).

立体声道配置以同样的方式，但有固定频率4波段均衡器(蓝色)。

The frequency of a sound wave, perceived as pitch, is the number of compressions that pass a fixed point per unit time.

声波的频率就是感觉的音调，是单位时间通过定点的压缩数目。

Using this algorithm, this paper has adopted fixed sampling rate when measuring without adjusting sampling intervals according to network frequency.

使用本算法，在测量时可以以固定采样率进行采样，不必根据电网频率调整采样间隔。

To lower the operation frequency I use fixed capacitors in parallel with the variable capacitor.

为了降低操作频率，我用固定电容器，可变电容器并联。

Derived and solved the governing vibration equations of orthotropic membrane, and obtained the power series formula of nonlinear vibration frequency of rectangular membrane with four edges fixed.

得到了按矩形四边固支边界考虑时，膜材大挠度非线性振动频率的幂级数表达式。

The structure, working principle, measuring circuit and frequency characteristics of contact potential difference nondestructive testing equipment using fixed probe am intro - duced.

介绍了接触电位差法固定探头式无损探伤装置的结构，工作原理，测量电路及其频率特性。

The output of common ultralow frequency signal generator has only a few fixed waveforms which can not be changed.

常用超低频信号发生器的输出只有几种固定的波形，不能更改。

Pulse width and frequency can be adjustable in succession within the range of the fixed one.

该电源输出脉冲电流的幅值、脉宽和频率都可以在规定的范围内连续可调。

In this paper, a current control mathematical model is established with fixed switching frequency for three-phase pulse width modulated (PWM) converter.

建立了三相电压型PWM整流器电流控制数学模型，输入电流在静止坐标系下实现了固定开关频率的解耦控制。

This scheme is based on the rotor flux, through the fixed switching frequency and using space vector modulation (SVPWM) method vector control.

本文方案是基于转子磁链定向、通过固定开关频率、运用空间矢量调制(SVPWM)方法的矢量控制。

It is convenient to change the optical intensity of the sidebands by tuning the DC bias voltage while the microwave modulation frequency and power are fixed.

当微波调制频率及功率一定时，可方便地调节直流偏置电压来改变各阶光波的强度。