Three pipeline coating detection technologies, multiple-frequency current method, ground potential-electrical field method, and pipe-to-soil potential method, are introduced.
本文在分析国内外现有的防腐层检测技术的基础上，提出了地下金属管线防腐层状态检测的新方法----电流梯度法。
Since its output frequency is as twice as the device frequency and it has the merit of soft-switching characteristic, multiple-frequency induction heater is widely used in high frequency application.
倍频式感应加热电源负载输出频率为功率开关管工作频率的二倍，且功率开关器件工作时具有软开关特性，在需要高频应用的场合很有意义。
Results are readily displayed and allow the user to quickly understand duplicated values or drill back into the full frequency distribution for single or multiple columns as Figure 11 shows.
评价结果立即显示出来，使用户可以快速理解重复的值，或者回过头查看单个或多个列的全部频率分布，如图11所示。
Wireless frequencies are a scarce resource, so wireless providers use multiplexing to send multiple calls over a single frequency.
无线频率是稀有的资源，因此无线频率提供商使用多路复用技术通过一个频率发送多个呼叫。
The root cause for interoperability remains the same--multiple users in different frequency bands using different waveforms.
同样，这也是使用不同波形、不同频率的多个用户不能保持互操作性的根本原因。
OFDMA is based on the idea of frequency-division multiplexing, which is a method to transmit multiple data streams over a channel.
OFDMA是根据频分多路传输系统的思想，这是一种在一个频道上传输多个数据流的方法。
The SNEP will employ the MPM1000 Net Centric Waveform Satellite Modem to provide Multi-Frequency-Time Division Multiple Access Bandwidth on demand technology for tactical mobile operations.
该SNEP将采用MPM1000网络中心波形卫星调制解调器，为战术机动作战提供所需的多频时分多址接入带宽技术。
To facilitate realistic testing, the heart of real is the radio frequency attenuation network, a system designed to simulate realistic field conditions for multiple radios.
为方便实际测试，REAL实验室的核心是射频衰减网络，可模拟多个无线电的真实部署。
Digitized multiple frequency CW radar is a kind of new system radar.
数字化多频连续波测距雷达是一种新体制雷达。
In this paper, the step frequency response equation of optical-region radar target is firstly established by using theories of multiple scattering centers and local resonance.
本文首先根据多散射中心理论与局部谐振原理，建立了雷达目标在光学区阶梯频率波形激励下的响应方程。
Multiple gauge high and low frequency wire networks for accurate, natural sound reproduction.
多个指标高和低频率线网络的准确，自然的声音复制。
The MIMO systems use multiple antennas at both the transmitter and receiver to transmit signal in the same frequency band at the same time can significantly increase the channel capacity.
MIMO系统在发送端和接收端利用多个天线同时在相同的频带内传输信号，使得信道容量得到很大的增加。
Within each tissue type, they calculated the frequency that multiple genes were mutated in the same sample.
在每种组织类型中，他们计算了在相同的标本中多基因变异的频率。
However, due to the size of a mobile and carrier frequency constraints, multiple antennas can not be possibly implemented.
然而由于移动台的尺寸和载频的限制，使多天线技术很难实现。
A packet scheduling algorithm for mixed traffics was proposed in orthogonal frequency division multiple access (OFDMA) systems.
提出了一种基于正交频分多址接入系统的混合业务分组调度算法。
Simulation shows the algorithm has good results in case of estimating single frequency, multiple frequencies and changing frequency under different SNR, and has robustness for noise inference.
仿真结果表明，该方法对于单频、多频和频率变化等情况均具有较好的估计结果，且对于噪声干扰具有较强的鲁棒性。
The HMM based multiple frequency line tracking algorithms of work well under very low SNR, except for a high complexity of computation and for generally unnegligible quantization error.
基于隐马尔可夫模型的多频率线跟踪算法，能在很低的SNR环境下工作，但量化误差较大，和计算量大。
AimTo use the common sample frequency in low speed to the sample of band-pass signals of multiple different frequency point in full frequency rage.
目的用公共的低速采样频率对全频段内许多不同频点的带通信号进行采样。
A joint blind estimation method based on spectrum overlap for uplink interleaved orthogonal frequency division multiple access carrier frequency offset and timing synchronization is proposed.
提出了一种基于功率谱叠加的交织正交频分多址系统上行链路载波频偏和定时同步联合估计算法。
The circuit includes an antenna interface module adapted to receive multiple frequency components via an antenna.
该电路包括适 于通过天线接收多个频率成分的天线接口模块。
The calculation result indicates that the torsional vibration frequency will avoid from power frequency and multiple frequency.
计算结果表明，机组扭振频率避开了工频与倍频，轴系不会因共振而破坏。
But compare with FFT, the calculation time needed by the multiple frequency rotate transform is very long, which has influenced its wide application to a certain extent.
但是，与快速傅立叶变换相比，倍频旋转变换理论所需要的计算时间很长，这在一定程度上影响了它的广泛应用。
Harmonic measure method is the key of the measurement. In this paper, the harmonic measure method which based on the multiple frequency rotate transform theory is researched and analyzed.
谐波测量方法是谐波测量的核心环节，本文对基于倍频旋转变换理论的谐波测量方法进行了研究分析。
The realization mode of solving ambiguity for multiple frequency ranging usually has two kinds:quadric difference frequency and uneven dual frequency.
多频测距解模糊的实现方式通常有两种：二次差频和参差双频。
Operation principle of harmonic balance method is explained through the input of single frequency and multiple harmonic.
通过单频输入和多谐波输入说明了谐波平衡法的工作原理。
Recently, Orthogonal Frequency Division multiple access (OFDMA) as a new multiple access technology has received a lot of attention.
近年来，正交频分多址接入系统做为一种新的多址接入技术受到了极大关注。
The theory of multiple input-output frequency response functions estimation is studied based on the finite Fourier transform.
以有限富氏变换为基础，研究多输入-多输出频响函数估计的一般原理。
This paper introduces the designing and testing of the wide frequency multiple dimensional snubber as well as its application in the infrared line scanner.
本文介绍了一种宽频多维减振器的设计、制作和试验以及它在红外行扫仪中的应用。
A multiple carrier frequency offsets (CFOs) estimation algorithm for multiple Input multiple Output Orthogonal frequency Division Multiplexing (MIMO-OFDM) systems based on pilot symbols was proposed.
提出了一种基于导频符号的多输入多输出正交频分复用(MIMO - OFDM)系统多频偏估计算法。
A multiple carrier frequency offsets (CFOs) estimation algorithm for multiple Input multiple Output Orthogonal frequency Division Multiplexing (MIMO-OFDM) systems based on pilot symbols was proposed.
提出了一种基于导频符号的多输入多输出正交频分复用(MIMO - OFDM)系统多频偏估计算法。
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