用对数周期振子阵作为背射天线的馈源。
The log-period dipole array is applied as a feed element for a back-fire antenna.
给出一类强非线性对称振子周期振动的一种解法。
The influence of translational kinetic energy on the period of vibration is analyzed.
临界混沌状态的周期振子对噪声具有免疫力，而对微弱的正弦信号或相位编码信号比较敏感。
The periodic oscillators at critical state are immune to noise and have sensitive dependence on weak sine signals or phase-coded signals at the same time.
还分析了不同开度情况下非线性约束对自振周期和振幅的影响。
The effect of nonlinear binding force on period and amplitude are also analyzed.
多质点体系：原子，耦合振子，周期晶格。
Many Particle Systems: Atoms, Coupled Oscillators, Periodic Lattice.
结果表明：罐内液体的晃动是长周期运动，并且是多阶振型的组合。
The result shows that the liquid sloshing appears as long period and combination of multi-modes.
本文基于外加周期激振力信号作用首次对双杆摆机构的混沌运动进行了有效的控制。
In this paper, the chaotic motion of a double-pendulum is suppressed efficiently based on the method of periodic force.
为了在脉振注射成型过程中提高制品质量、缩短成型周期、降低能耗，提出了混合集成智能多目标优化的思想。
To improve part quality, shrink molding period and decrease energy consumption, the work provided a set of theory according to hybrid integrated intelligent optimal ideal.
抗震性能包括对结构低阶自振周期、顶点位移、最大层间位移角、框架承担承担水平地震剪力、框架承担地震倾覆力矩比几个方面。
The main seismic performance is introduced, including low level period, top displacement, maximum layer displacement Angle, frame bearing horizontal shear, frame bearing earthquake overthrow moment.
本文介绍了一种计算塔设备自振周期的新方法。
This paper presents a new method for calculating the natural vibration period of towers.
设计地震区的高层建筑时，选择结构的适宜自振周期是十分重要的。
It is important to select reasonable natural period of high-rise building in seismic design.
提出了一种精确有效的数值算法，用以确定谐波激励下的分段线性振子的周期运动。
This paper presents an efficient numerical scheme for calculating the periodic motion of a harmonically forced piecewise linear oscillator very accurately.
静力优化设计的优化目标是截面截面应力平方均值最小，动力优化设计的优化目标是结构自振周期平方和最小。
The target of static optimization is to minimize the average of the squared sum of stresses while the target of dynamic optimization is to minimize the squared sum of natural vibration periods.
轴系扭振的模态对数衰减率正比于每个振动周期耗散的能量与峰值应能的比值。
This logarithmic decay ratio of the shaft set is in direct proportion to the ratio of the energy dissipated per cycle to the peak strain energy.
它不仅与冲击波的作用情况有关，而且与通风构筑物的形状、大小、自振周期等因素有关。
It is a very complicated problem that is not only related to the shock wave interaction, but also to the shape, size and natural frequency of the ventilation structure.
利用周期激振力法，对欧拉动弯曲问题中的混沌行为进行了有效的控制。
The chaotic behaviors in Eulers dynamically buckling system were controlled by means of the periodic force excitation.
我们在这篇文章里主要对带阻尼的碰撞振子的周期解作研究。
In this paper, we study the periodic solutions of the impact oscillator with damping.
研究了砖石古塔的结构特性，提出了对古塔自振周期的计算公式。
The paper studied the characteristic of structure of ancient brick and rock pagoda, proposed the formula of self vibration period for ancient pagoda.
研究了利用耦合反馈控制法和周期激振力法来控制欧拉动弯曲问题。
In this paper, the problem of controlling the Euler's dynamically buckling problems by means of the coupled feedback controlling and periodic force excitation were studied.
理论计算与实测数据表明，所述方法可以用来确定大型框架塔的自振周期。
The theoretical values and the measured data on the installed unit show that this method can be applied to determination of the natural vibration period for a large-scale framed tower.
最后以船舶机械非线性隔振系统为例，分别分析了该改进方法在系统呈现周期运动和混沌运动时的应用。
Finally, the periodic and chaotic motions of a nonlinear vibration-isolation system for on-board machinery are investigated.
现行规范中已存在许多经验公式去描述非抗震设计的钢筋混凝土结构的自振周期与建筑高度的关系。
Some empirical relationships for non-seismic design RC structures are now used in several design codes to relate the fundamental period to the height of a building.
通过计算一个运动周期内作用在平板上的总功，分析了理论平板的颤振机理。
After evaluating the total work acting on the ITP by the airflow during an oscillating cycle, the flutter mechanism of the ITP was discussed.
本文研究了修改桥梁结构设计参数，使其自振周期和振型满足预先给定设计要求的动力特性修改过问题，提出了一种求解方法。
This paper presents a method for modifying the designing structural parameters of a bridge structure so that the bridge structure will freely vibrates at prescribed frequencies and modes.
动力特性测试结果表明：随着节点转动刚度的减小，框架自振周期延长。
Dynamic characteristics tests show that the natural vibration period of steel frame can be prolonged with the reducing of connection rotation stiffness.
且各级衍射光的偏振度随着透振方向的改变而发生周期性的变化。
At the same time, degrees of polarization (DOP) of every diffraction order periodically alter with change of polarization orientation.
提出了在弹簧振子作简谐振动时，利用集成开关型霍尔传感器测量振动周期，以进一步测量物体惯性质量的方法。
The method to measure body's inertial mass is proposed by measuring period of vibration with the integrated hall switch sensor, when spring oscillator is in situation of simple harmonic vibration.
因此本文提出了通过检测混沌振子阵列的间歇混沌周期来检测微弱信号的新方法。
Therefore, the detected signal can be gained by detecting the intermittent chaotic periodicity of chaotic oscillator.
通过对方程组的求解，得到这种类型设备的自振周期及振型。
By solving equation group, the basic nature vibration period and vibration modes of this type equipment are obtained.
通过对方程组的求解，得到这种类型设备的自振周期及振型。
By solving equation group, the basic nature vibration period and vibration modes of this type equipment are obtained.
应用推荐