波动的

Then the method of wave control based upon the abovemethodology and the solution of D'alembert,and the numerical simulations aboutthe model of Euler beam are made.

并且以D'alembert解为基础，给出了对任意扰动所形成的波动控制方法，并以Euler梁为模型进行了数值仿真。

Of course, if any major fluctuations in the economy, the exchange rate adjustment will be deferred.

当然，如果有重大波动，经济，汇率的调整，将推迟。

Three preliminary conclusions could be approached as follows:(1) SST changes were distinctively characteristic of stepwise fluctuations. A warming trend during the last deglaciation was punctuated by a slightly cooling event which corresponded to the Younger Dryas. The Holocene episode could be divided into three phases of warming, continuously high temperature and cooling.(2) Two remarkable cooling records were documented around 4 kaBP and 1.5 kaBP after the megathermal of the Holocene.(3) Comparison between time series of MD05-2904 diatom R SST index and stalagmite δ^18O results from Dongge Cave, Guizhou Province suggested that changes in the East Asian Monsoon climate is synchronous with variations in the SST in the northern SCS since the last deglaciation and they might have a close correlation with each other

结果表明：(1)南海北部15 kaBP以来表层海水温度呈现明显的阶段性波动特点，即末次冰消期气候转暖过程中，12.9~11.5 kaBP前后温度略有下降，与新仙女木事件对应，全新世南海北部气候依次经历了升温期、高温期和降温期3个变化阶段；(2)全新世大暖期鼎盛期结束后，南海北部海水温度阶段下降，两次明显降温分别发生于4 kaBP前后和1.5 kaBP前后；(3) MD05-2904孔硅藻R值时间序列曲线与董哥洞D4石笋δ^18O曲线对比表明，南海北部表层海水温度变化与末次冰消期以来东亚季风强度变化关系较为密切。

The quadratic function of wave equation was derived.

推导了波动方程的二次泛函形式。

The high - order difference method of wave equation has the advantages of high accuracy and small numerical dispersion.

波动方程高阶差分法具有精度高、数值频散小的优点。

We apply a differential evolution algorithm to study parameter inversion of two-dimensional wave equation.

利用微分进化算法进行二维波动方程参数反演的研究。

Key words two-dimensional wave equation; parameter inversion; differential evolution algorithm; finite element

利用微分进化算法进行二维波动方程参数反演的研究。

He discovered diffraction and proposed the wave theory of light to explain it.

他发现衍射现象，建议用光的波动理论来解释这一现象。

In the U.S. during the 1940s, the number of diphtheria cases fluctuated between 15,000 and 30,000 annually.

在美国1940年代白喉病例的数目每年在15，000到30，000之间波动。

Preliminary analysis of a random discount factor and the risk premium, volatility borders, and other characteristics of the structure.

初步分析了随机折现因子与风险溢价的关系、波动率边界、因子结构等特征。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。