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Then based on the characteristic equation, the effect of the position of intermediate support on the natural frequencies of the beam is discussed.

根据频率方程讨论了中间支承位置变化对梁固有频率的影响。

The researched results show that only when excess frequency equal to the natural frequency of chlorophyl the electronics transition occur. This would induce that the chlorophyll absorbs 432um blue light and 662um red light.

研究结果表明:只有外场频率与叶绿素的固有频率相等时电子才发生跃迁,从而导致叶绿素吸收中心波长432nm的蓝光和662nm红光。

The analysis of sister chromatid exchange frequencies is a useful tool for the study of damages in genetic material of human beings induced by enviromental mutagens and carcinogens.

用荧光加Giemsa术区分姐妹染色单体,分析了13名中年男子外周血淋巴细胞的SCE,比较吸烟者和不吸烟者"自发"的和用丝裂霉素诱发的SCE频率变化。发现吸烟者的SCE频率(8.33±1.08)显著地高于不吸烟者(4.41±0.72),p.001。

Spectral aliasing is caused by interference between two frequencies such the luminance and chrominance signals.

光谱混叠是由两个频率如亮度和色度信号频率之间的干扰引起。

The paper introduces a kind of acoustics principle,and a new method which measuring resonance frequency of the circular saw blades by means of a sound level meter,inorder to provide the reference of testing resonance frequency parameter for all kinds of woodworking cutting tools.

介绍了一种利用声学原理,采用声级计为传感器的木工圆锯片固有频率测量的新方法,以期为各类木工刀具的固有频率参数测试提供借鉴。

The paper introduces a kind of acoustics principle,and a new method which measuring resonance frequency of the circular saw blade s by means of a sound level meter,inorder to provide the reference of testing resonance frequency parameter for all kinds of woodworking cutting tools.

介绍了一种利用声学原理,采用声级计为传感器的木工圆锯片固有频率测量的新方法,以期为各类木工刀具的固有频率参数测试提供借鉴。

The following are the expressions for the mean pressure set up at the detection plate and for the time of the signal to progagate from the radiator to the detector:这里是1个公式,省略) where Re is the real part of the expression appearing within the braces, 0 is the density of the medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in the medium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel and the axis of the tube, r = vro/c, v is the flow speed of the fluid, d is the diameter of the pipe, m is the circular frequency, k is the wave number, where a is the radius of the plate (this is taken as the same for the emitting and receiving plates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, and The triple sums in the expressions for N~ and N2 may be neglected if the flow speed is low, since the contributions for these become negligible.

以下的表情为代表的压力设置在检测板甲,手持骑枪和时间的信号 progagate从散热器排出到检测器(这里是1个公式、省略)。在什么地方才是真正的出现在背带,表现为0密度的吗当时的媒介的振幅振动速度、c是声音的速度中、d2 =我+ r / z,8、z是距离的发射和接收板、B之间的角度对声信道和轴轴管,r = vro / c,v的流体的流动速率公式,d 管直径的圆频率,m,凯西是波数公式* n,一个是半径的板(这是作为相同的发射和接收吗为了简单,但板板是毫无困难地讨论不同半径)、镁-,~的振动频率的发光,。总结了三倍的表达方式和N2 ~能忽略的流量速度低,因为这些变得微不足道的贡献。

The following are the expressionsfor the mean pressure set up at the detection plate and for the time of the signal toprogagate from the radiator to the detector:这里是1个公式,省略) where Re is the real part of the expression appearing within the braces, 0 is the density ofthe medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in themedium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel andthe axis of the tube, r = vro/c, v is the flow speed of the fluid, d is thediameter of the pipe, m is the circular frequency, k is the wave number,where a is the radius of the plate (this is taken as the same for the emitting and receivingplates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, andThe triple sums in the expressions for N~ and N2 may be neglected if the flow speed islow, since the contributions for these become negligible.

以下是表达式平均压力为定于检测板和为信号时间progagate从散热器到探测器:(这里是1个公式,省略)假如再是出现在大括号表达式的实部,0是密度中期,沃是速度的振动幅度,C是健全的速度中,D2中=我+的导向8,z是对之间的距离发射与接收板,B是声之间的通道轴角该管的轴,R =中心内大多分为/荤,v是流体的流动速度,,D是管道直径,m是圆频率,k是波数,的其中一盘是半径(这是为重点,同样的发射与接收为le简单板,但没有讨论板的困难,在半径不同毫克),,是发光板振动频率,和在N的表达式的三重总结和N2可以忽略,如果流速低,因为这些变得微不足道的贡献。

In the first chapter, the class of modern frequency composing techniques and the recent development situations have been introduced. Then the advantages and disadvantages of the techniques have been described. At last, based on the techniques mentioned above, a scheme to realize the X-band low phase noise frequency source has been proposed.

在第一章引言部分,主要介绍了现代频率合成技术的分类及技术发展近况,并就每一种合成技术的优缺点做了简要的陈述,最后以上述不同合成技术的优缺点为基本指导思想,提出了一种实现X波段低相噪频率源的方案。

The first two categories known as the ratio of a timetable requiring the high ratio tend to produce high-frequency response; subsection (3),(4) class is called interval timetable according to which long intervals tend to produce low-frequency response.

前两类称为比率时间表,要求高比率时倾向于产生高频率反应;第(3)、(4)类称为间隔时间表,规定间隔长时倾向于产生低频率反应。

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Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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