In this longitudinal study, 4, 689 Iceland residents aged 33to 65 first participated in a population study and were questionedabout frequency of headaches and symptoms.
在这个纵向研究中，有4，689名冰岛居民，年龄在33到65岁之间，首次参与到人口研究中来，进行关于频发头痛及症状的调查。
Secondly, when the operation frequency is given, the dispersion relation between transverse wave vectors were analyzed with various longitudinal wave vector or modulation coefficients.
其次，在给定工作频率的情况下，分析了不同纵向波矢量和不同调制系数时的横向波矢量间布里渊区色散特性。
A lot of subjects such as the difference between longitudinal and transverse conductivity, proton compensate, frequency response, and sample geometry etc, remained for further study.
但测试过程中还有许多问题有待进一步研究，如膜的纵向与横向电阻的差别、质子补偿、膜的频率响应特性、测试几何尺寸的影响等。
Based on equivalent four-terminal networks of the longitudinal ultrasonic transformer, the resonant frequency equation and the amplitude magnification coefficient, with reactive load, are studied.
在负载为纯力抗的状况下，利用纵振型变幅杆等效四端网络，对频率方程和放大系数进行了研究。
The longitudinal distributions of source intensity spectrum of several typical ships is given on the basis of time frequency analysis of the passage signature of ship radiated noises.
籍助对舰船噪声通过特性信号的时频分析，得到了若干典型舰船的噪声源强度谱纵向分布特性。
The natural longitudinal or torsional vibration of a wedge-shaped shaft is studied with perturbation method. The vibration mode function and the frequency characteristic equation are derived.
采用摄动法研究了楔形杆轴的固有纵扭振动，并且推导出了其固有纵扭振动的振型函数及频率特征方程。
A nonlinear parametric excitation equation is obtained for ships in longitudinal waves, and the dynamic stability is analyzed when the natural frequency of heave and roll are approximately equal.
本文建立了在纵浪上航行船舶的非线性参数激励横摇运动方程，研究了当升沉固有频率接近横摇固有频率时船舶的稳定性。
By changing the cross sectional radius decay coefficient of the exponential metal horns, the longitudinal and torsional vibrations in the transducer could resonate at the same resonance frequency.
通过改变换能器前后指数型盖板的半径减编系数，得出了换能器中纵向与扭转两种振动模式同频共振的条件。
Based on mechanic equivalent circuit of the longitudinal ultrasonic horn, the resonance frequency and the amplitude magnification coefficient of three kinds of loaded horns are studied.
在纵振型变幅杆等效电路的基础上，研究了三类负载超声变幅杆的共振频率与放大系数。
The theoretical derivation shows that the vibro-rotary forging efficiency is directly proportional to the vibration frequency and feedrate and higher than that of longitudinal vibration forging.
通过本文的理论推导表明，扭转振动摆动辗压的效率与振动频率和进给速度成正比，扭转振动摆动辗压成形的成形效率比纵向振动摆动辗压成形的成形效率高。
Therefore, the horizontal linkages system reduced the effect of the longitudinal cracks on the positively symmetrical transverse bending mode frequency.
横向联系体的存在减小了纵向裂缝对横向正对称弯曲模态频率的影响。
The designing principle is that the E-field longitudinal distribution and the local quadrupole cut-off frequency should be kept as constant as possible.
其设计原则是尽可能地保持电场的纵向分布和四极截止频率保持不变。
The resonance frequency equations for the longitudinal and flexural vibrations in the transducer are derived.
通过修正金属细棒的长度和横截面积，实现了换能器中纵向振动与弯曲振动的同频共振。
A low frequency multi mode ultrasonic Lamb wave method suitable for characterizing shear and longitudinal wave velocities, thickness and density of ultra thin elastic layers is presented.
提出了用低频多模式超声兰姆波定征方法来估计超薄弹性层的纵波声速、横波声速、厚度和密度等参数。
A low frequency ultrasonic (Lamb like) wave method is used for characterizing the shear, longitudinal wave velocities, the thickness, and the density of ultra thin two layered bonding composite.
提出用低频超声类兰姆波定征方法来估计超薄双层胶结复合结构各层的纵波声速、横波声速、厚度和密度等参数。
Sound example 5: "Yankee Doodle" played on strings tuned to the same pitch (transverse frequency) but with different longitudinal mode frequencies (two versions in different keys).
健全例如5：“扬基歌”上播放字符串调整同一球场（横向频率），但不同的纵模频率（两个版本在不同的键）。
A low frequency ultrasonic Lamb like wave method suitable for characterizing the thickness, density, shear and longitudinal wave velocities of the ultra thin bonding composite is presented.
提出用低频超声类兰姆波定征方法来估计超薄黏结复合结构各层与黏结层的厚度、密度、纵波声速和横波声速等参数。
The principle of a frequency stabilizing unit and its power circuit for a double longitudinal mode laser are introduced.
介绍一种双纵模激光器的稳频装置原理及其电源电路。
A method of calculating the waveguide invariant based on the frequency-shift compensation method, which is used to improve the longitudinal correlations of acoustic fields, is developed in this paper.
基于提高声场水平纵向相关的频移补偿方法，提出了一种声场波导不变量的计算方法。
This paper discussed an opto-heterodyne technique for small-plane-angle measurement with a frequency-stabilized longitudinal Zeeman laser as the light source.
文本用纵向塞曼双频稳频激光器作光源，提出了一种光学超外差法小平面角的精密测量方法。
The attenuation factor of longitudinal wave was changing linearly, whereas the attenuation factor of the slow shear wave kept nearly constant with a low frequency on the exploration seismic band.
纵波的衰减系数在地震频带内基本上呈线性变化，而横波的衰减系数在地震频带内除低频外基本保持稳定。
A broadband underwater Tonpilz transducer was designed by using the coupling of transducer's longitudinal vibration mode and the bending vibration mode of front mass to widen its frequency band.
该换能器利用前盖板的弯曲振动与换能器的纵向振动耦合展宽频带。
The subtle interactions between magnetohydrodynamics and high-frequency plasma waves involving transverse and longitudinal modes are investigated.
本文研究了磁流体力学与高频等离子体波(包括纵横模式)之间的精巧的相互作用。
The frequency response function, frequency-domain and time-domain expressions for the longitudinal vibration velocity at the pile top were obtained further.
研究了渐缩自由桩和渐扩自由桩的桩顶纵向振动速度时域曲线特征；
Propagation characteristics of high frequency longitudinal axisymmetric modes in full-length-bonding bolt are studied.
分析高频纵向轴对称超声导波在全长黏结型锚杆中传播的特性。
Not only greatly improved low-frequency qualitative feeling, also let a bit more acoustic that increases the transverse longitudinal more balanced full!
不仅大大提升了低频的质感，还让声场增大了不止一点，使得横向纵向更加的均衡饱满！
The longitudinal response frequency and damping features of the flexible wing at both modes of long and short periods are also better than those of the fixed wing.
柔性翼的长周期和短周期模态的衰减特性和阻尼特性略优于刚性翼。
The longitudinal response frequency and damping features of the flexible wing at both modes of long and short periods are also better than those of the fixed wing.
柔性翼的长周期和短周期模态的衰减特性和阻尼特性略优于刚性翼。
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