复杂振动中频率最低的成分(基频或一次谐波)。
The component having the lowest frequency in a complex vibration (fundamental frequency or first harmonic).
其中频率优化是对网络优化有着举重轻重作用的基础性工作。
The frequency optimization is to optimize the network has a role in the severity of the basic weight lifting work.
结果：该设计能时实动态显示出DNA杂交反应中频率的变化。
Result this circuit can do real time monitoring for frequency change of DNA hybridization reaction.
石英谐振器在贮存、使用过程中频率随时间变化的现象称为老化。
During storage or in operation the frequency of the crystal resonator will change according to the duration period, which is define as aging in crystal field.
介绍了基于DSP的微机继电保护装置中频率测量的CPLD实现。
This paper introduces CPLD realization of frequency measure in digital relay protection equipment powered by DSP.
并利用三维动态有限元模拟了点焊接头疲劳裂纹扩展过程中频率变化特性。
Then the characteristics of frequency variation during the fatigue crack propagation process are simulated by three - dimensional dynamic finite element analysis.
为提高扫描过程中频率的精度和准确度需要选择合适的扫描信号和检测方法。
We should choose the suitable sweep signal and good test method to improve the precision and accuracy of frequency.
意思就是说重力异常中频率比较高的信号可能与沉积层覆盖下的基底的起伏有关。
It follows, that where the igneous basement is concealed by a sediment cover, the gravity anomaly may contain a high spatial frequency signal corresponding to the morphology of the buried basement.
本文分析了数字锁相环路的寄生频偏，它是现代通讯系统中频率合成器的重要指标之一。
This paper gives an analysis of parasitic frequency deviation in the digital phase locked loop, which is one of the important specifications of modern communication systems.
这对于高纯频率捷变合成信号源和军用数字通信设备中频率合成器的设计具有重要意义。
It has important significance in the design of high purity spectrum agile signal synthesizer and frequency synthesizer in military digital communication equipment.
在现有计算机内存和运算速度条件下，电性各向异性地层中频率域电磁响应的数值模拟是一个难点。
The numeric simulation of electromagnetic responses in frequency domain for electrical anisotropic formation is a challenge in current conditions of computer memory and operation speed.
根据系统的带宽，在控制器中加入低通滤波器，以保证系统跟踪效果，过滤控制信号中频率过高部分。
According to the system bandwidth, the low pass filter was added in controller to assure the tracking effect of system and filter the super-high frequency in control singles.
地震波反演的另一个障碍，主要是所记录的地震波响应中频率信息及相应的振幅真值的不完整与严重缺失。
The other problem in seismic inversion is that the frequency information and amplitude real value recorded by seismograph are incomplete and severely absent.
从真空中模态特征频率出发用迭代法直到水中频率收敛为止而得到水中方板的特征频率，进而计算了方板的棤态辐射效率。
Moreover the vibration frequencies of the plate are computed using iterative method, which begins with the in vacuo eigenfrequency and continues until in-water eigenfrequency con-verges.
根据水声mfsk或跳频通信中频率估计特点，提出了一种基于自适应线谱增强器(ale)理论的实用高分辨频率估计新方法。
A novel adaptive line enhancer (ALE) with high frequency resolution was presented, which suitable for underwater acoustic communication with MFSK or frequency hopping (FH) modulation.
方法在传感器体系中，于不同温度条件下测定空白芯片、已包被芯片在气相中和液相中频率达到稳定的时间，和抗原抗体反应时间随温度变化量。
Methods To detect the time consumed before frequency becoming stable in air and in solution under different temperature. And the time varied with the change of temperature.
在信号的中频数字接收过程中，数字下变频、载波频率与相位跟踪是设计的关键所在。
In the process of signal digital intermediate-frequency received, digital down convertion, frequency tracking of carrier and phase locked loop are the keys.
合成孔径成像系统在获得高截止频率的同时，降低了系统的中频性能，并且合成孔径成像系统的信息获取在方向上具有可选择性。
The cut-off spatial frequency is got higher at the cost of the loss of mid-spatial frequency, and the information got by the system are different in all directions.
通过对信号进行基于瞬时自相关的瞬时频率提取的方法对中频信号进行分析、识别，然后可以在FP - GA内部构造一个多通道匹配滤波器对信号进行匹配。
The article analyses the signal through the method of gaining instant frequency on the base of instant correlation, then we can make up a multicenter matching filter in the FPGA.
该电路具有低功耗、增益可调范围宽和频率范围宽的特点，适用于一般的中频接收机。
This circuit has the characteristics of low power, wide gain adjustable range and wide bandwidth.
本文提出了通过系统设计的方法将频率捷变雷达综合测试仪频率跟踪精度的检定在中频进行。
The system design method proposed by the paper examines the frequency tracking accuracy of the frequency agile radar synthesis detection unit at intermediate frequency.
其中频谱的非零频率信息可提取噪声能量，频谱的零频率信息可提取信号能量。
Then, noise energy can be abstracted from the nonzero frequency information of the spectrum, and signal energy from zero frequency information.
为使系统的功率因数较高，采用电压源型负载串联谐振中频逆变器和频率跟踪技术。
In order to improve the power parameter further, the intermediate frequency inversion of an electric voltage power type series resonance and frequency trace technique are adopted.
中频频率和水平磁偶极子天线(垂直环状天线)是井下采区无线通信可使用的频段和天线型式。
Medium frequencies and horizontal magnetic dipoles (vertical loop antennas) can be used in underground radio communication in mining sections of coal mines.
对该新方案进行了理论分析，进而对这种改进二次变频方案提出了采用的频率配置关系和中频滤波器参数设计准则，并结合一个工程实例完成了相关设计。
Based on the theory analysis of this scheme and an engineering example, formula of frequency planning and design rules of intermediate frequency filter's parameter are proposed.
给出了全相参雷达频率源的中频相干振荡源及时钟频率之间的最佳频率关系。
Best frequency relation is given between IF coherent oscillating source and clock frequency of full coherent radar.
介绍锻钢冷轧工作辊双频感应淬火设备特点，国内首创较低的中频频率的选定，与同类淬火设备比较的优点。
This paPer introduces the equipments of double-frequency induction heating the forged steel cold work roller, and compare with the same kind induction heating equipments.
该方案的显著特点是：调制方式、调制速率、中频频率皆可编程设置。
The outstanding features of this plan lie in the programmable modulate mode, modulate rate, IF rate and so on.
给出了V型人工电源网络规范中对阻抗模值和相角修改的内容，并对人工电源网络使用频率范围中的低频、中频和高频增加相角规范内容的原理进行了详细分析。
Gives the amendment of impedance magnitude and phase angle on AMN V-netwoks and analyses the rationale of the addition of impedance phase angle at low, medium and high frequencies.
给出了V型人工电源网络规范中对阻抗模值和相角修改的内容，并对人工电源网络使用频率范围中的低频、中频和高频增加相角规范内容的原理进行了详细分析。
Gives the amendment of impedance magnitude and phase angle on AMN V-netwoks and analyses the rationale of the addition of impedance phase angle at low, medium and high frequencies.
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