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The linear vibration problems under periodic exciting force and general exciting force are numerical analysis by barycentric Lagrange interpolation collocation method.

利用重心Lagrange插值配点法分析了周期激励和一般激励下线性振动问题。

Short-term system load variation has apparently periodicity, the load is a variable that is influenced by many kind of factors, it can be subdivided into periodic basic load component and variable load component.

电力系统负荷变化具有明显的周期性，是一个受多种因素影响的量，可以将其分为周期性的基本负荷和受多种因素影响的变动负荷两部分。

Microgram for microgram, beryllium is one of the most toxic elements on the periodic table.

一微克，又是一微克，铍是周期表上最有毒的元素之一。

Then based of it, we combine the log periodic antenna with the biconical as a broadband assembled antenna.

然后在此研究基础上对三角天线进行研究分析，并将对数周期天线与之组合设计制造出一副组合式宽带天线，用于展宽对数周期天线的频带宽度。

There are all kinds of antennas used in EMC test such as biconical antennas, log periodic antenna, helical antenna, ridged horn antenna and etc.

用于电磁兼容试验的宽频带天线有很多类型，如双锥天线、对数周期天线、螺旋天线、喇叭天线等等。

Secondly, in this paper, the four typical UWB antennas of TEM horn antenna, log-periodic antenna, biconical antenna and helical antenna are theoretically analyzed and the UWB antenna design methods are generalized and discussed.

其次，本文对TEM喇叭天线、对数周期天线、双锥形天线和螺旋天线四种典型的超宽带天线进行了理论分析，总结并讨论超宽带天线的设计方法和手段。

In this Chapter,by Floquettheory and the technique used in Chapter 4,it is solved that asymptotically almostperiodic solutions bifurcate from the periodic solution.

在本章我们只是考虑了一种特殊情况，即时滞等于周期T。这是对此类问题的一种研究尝试。

The periodic solution can be bifurcated from equilibrium point with the variation of parameters.

系统随着参数的变化，从平衡点分岔出周期解。

In view of this algorithm, the sufficient conditions ensuring that the bifurcated periodic solutions are orbitally asymptotically stable and unstable on the center manifold are obtained.

通过这一显式算法，给出了分支周期解在中心流形上轨道渐近稳定和不稳定的充分条件。

A periodic oscillation analytic solution for the system at bifurcation point was obtained by using the method of series.

利用级数法求出了系统在分歧点处的时间周期振荡解的解析表达式。

It also analyzes the feature and development of semi-finish grinding and finish grinding by roller press.

同时进行了辊压机半终粉磨和终粉磨系统的特点和发展分析。

When I got there, water was dripping slowly from the ceiling and forming a pool on the floor.

当我到那里的时候，水是慢慢地从天花板滴而且形成在地板上的一个池。