basic frequency

Study on the basic frequency analysis of external prestressed concrete beams based on perturbation

基于摄动法的体外预应力梁基频分析

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The calculating formulae and short_cut methods for design, which are about the basic frequency of vibration, and the structural coefficient of the basic vibration model, are put forward.

提出了筒承式群仓平动自振基频、结构基本振型指数的计算公式及简化设计方法。

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The result has no difference under earthquake generated in different ways, with basic frequency of 3.6 Hz and normal-symmetry pattern, and agree with data observed at similar dams abroad.

实测资料表明，各种不同激振方法所得成果甚为一致，坝体基本频率为3.60HZ，其对应振型为正对称型，与国内外同类型砼拱坝原体实测资料也基本相近。

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This work deals with the fundamentals of basic frequency band signal transmission sys-tem for well logging and analyzes the bipolar return-to-zero system and Manchester trans-mission system for well logging in detail.

本文介绍了基带传输系统的原理，并较详细地分析了用于测井的双流归零制基带传输系统和曼彻斯特传输系统。

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From the analysis results, one can get the conclusions as follows: ( 1) The soft soil's affection to the basic frequency of BIS-SSI is much less than the ordinary structure.

通过分析，得出以下结论：（1）软土地基对隔震结构基本频率的影响远小于软土地基对非隔震结构基本频率的影响。

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The various tendencies of the basic frequency and the damping ratio of the pile-soil-frame structure system model has been analyzed with the top structure quality increase.

分析了随上部结构质量的增加，桩-土-框架结构体系模型的基本频率和阻尼比的变化趋势。

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The analyst works with these inferences as well as the basic frequency distribution to assess the integrity of the domain or column and report findings.

分析师使用这些推断和基本频率分布来评估域或列的完整性，并报告得到的发现。

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A simple formula for finding basic frequency is derived by use of relation of root and coefficient, and an example is enumerated to illustrate its application.

对特征方程利用根与系数的关系，导出了一个计算基频的简便公式，并结合实例说明其有一定的实用价值。

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Last, the effect on structural basic frequency by partial scathing components and the scathing parts' position in the scathing space truss structure may be found out by anti-analysis.

最后，总结出特定空间网格结构正常使用允许的频率范围，以及部分构件损伤对结构基频造成的影响，从而反分析出有损伤的空间网格结构的损伤部位。

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Based on the measured basic frequency and crack characteristic, the dynamic characteristic of the whole bridge was divided into the dynamic properties of single beams.

基于实测基频和裂缝特征将整桥的动力特性分解为单梁的动力特性，应用钢筋混凝土单梁模型试验研究成果，对RC梁桥结构性能进行评估。

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The Effect of the Interaction between Silos and Foundation on the Basic Frequency of Silo Vibration

相互作用对筒承式筒仓自振基频的影响

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Research of the Numerical Emulation and Dynamic Simulation of the Relation Between the Basic Frequency Equivalent Impedance of the TCSC and Basic Frequency Reactance of the TCR

可控串补基频等效阻抗与TCR基频电抗关系的仿真和动模实验研究

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Combine to in a transformer substation with more content of power system harmonics how applied the FFT precision to measure the basic frequency U, I to carry on the study.

并对在谐波含量较多的变电站中如何应用傅氏算法精确测量基频U、I进行了探讨。

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Let's write something that uses basic frequency analysis to decode an encoded message.

让我们编写一些程序以使用基本频率分析将编码信息解码。

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A novel all optical scheme for extracting clock pulses with basic frequency from the receiving non uniform OTDM optical signal is proposed.

提出从接收到的光信号脉冲串中提取光基频时钟的方案。

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The PLL system is a stable phase feedback control system with many useful outputs, and it is robust to its inner parameters and small change of input's basic frequency.

该改进PLL系统是一个稳定的相位反馈控制系统，产生的多个输出信号可用于多种电能质量扰动的检测，而且对于检测系统的内部参数和电力系统频率的变化是鲁棒的。

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Basic Frequency Band Signal Transmission System for Well Logging

用于测井的基带传输系统

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Study of Carry-over Displacement on the Floor Vibration Beyond the Basic Frequency Resonance

扰频超过基频后楼板振动传递位移的研究

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By analysising above measured data get the relationship between actual impact coefficient of and speed/ basic frequency.

由以上实测数据分析结构基频、车速两个因素对实测冲击系数的影响并作了相关分析。

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Theoretical analysis shows that the basic frequency and the mass of flexible base are the most two important factors which influence the isolation efficiency.

理论分析表明，柔性基础的基频和质量是影响隔振效果的最重要因素。

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The gastric electrical activity parameter of post-treatment compared with that of prior-treatment: basic frequency and main power increased significantly;

FD患者治疗后与治疗前胃电参数指标进行比较：主频、主功率显著增加（P

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Numerical studies showed that small variation of the basic frequency might cause a qualitative movement change of the fibrous cap.

数值模拟结果表明，纤维帽内外压力差脉动频率的微小变化有可能导致纤维帽运动形式产生质的改变；

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So the model of dynamic assessment is structural basic frequency and crack characteristic-rigidity-nominal ratio of reinforcement-resistance to bending of single beam.

综上所述，本文建立的动力法评估模型为：结构基频和裂缝特征→刚度→名义配筋率→单梁抗弯能力。

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First, the wavelet coefficients of basic frequency are extracted to identify the short duration disturbance like voltage sag, swell and interruption.

先提取基波频段所在的小波系数将电压凹陷、电压凸起和电压中断分别检测出来；

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The beam quality of the frequency-doubled beam deteriorates seriously with the beam quality of basic frequency reducing.

发现随着基频光束模式变差，倍频光束质量严重恶化。

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The results show that the basic frequency is higher and the models are not dense;

结果表明，结构体系的基频较高，模态不密集；

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Under harmonic loads, when the load frequency is less than the basic frequency of the SDOF systems, the amplitude is reduced with the increase of the post-yield stiffness.

在简谐荷载作用下，当荷载频率低于结构自振频率时，总体上振幅随后期刚度增大而减小；

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Discussion on fault location filter of transmission line based on basic frequency measurement

基于基频电气量的输电线路故障测距的滤波探讨

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Due to restrictions on power and frequency, Further raises the single processor basic frequency is limited.

由于受到功耗和频率的限制，进一步提高单处理器的主频受到限制。

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Their basic frequency error performance and probability of loss-of-lock at various signal-to-noise ratios is compared by tracking a common simulated high-dynamic trajectory.

并以均方根估计误差和失锁概率为性能指标，通过对同一模拟的接收机高动态轨迹的跟踪估计，比较了两种不同估计技术的基本性能。

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