达到极大值

In mechanical vibration, when the natural frequency of plan dynamic frequency and system is consistent, the amplitude of forced vibration reachs great value.

在机械振动中，当策动力的频率和系统的固有频率一致时，受迫振动的振幅达到极大值。

When the height/width ratio is 2, the horizontal displacement at the lateral surface in the middle forged piece reaches its maximum.

当高宽比=2时，锻件侧面中部的水平位移达到极大值，这一规律不因压下率而改变。

A more reasonable SAO index is therefore defined as the SAO variance percentage of the difference of the zonally averaged SLP between 40°S and 65°S.

其次，在南半球冬季，600—100hPa的南太平洋上空西风急流会出现分裂，其中副热带急流中心位于27.5°S，高纬度急流中心位于60°S，前者在200hPa层风速达到极大值，后者风速随高度增加而增加。

The numerical results show that tripolar structures are produced when the updraft velocity reaches the maximum value for the strongly-developed cloud,an...

结果表明，对流云上升气流达到极大值时，较强和较弱两块云分别具有三极性和反偶极性电荷分布结构。

The results of XPS about the boron-rich rare-earth borides synthesized by themethod mentioned above show that the valence of La is +3, and the valence of Smand Eu is a fluctuation system in which the average valence is about 2.6 for Smand 2.4 for Eu.

对〓(x=0.1，0.3，0.5，0.7，0.9)及〓(x=0.1，0.3，0.5，0.7，0.9)两个系列富硼双稀土硼化物的XPS研究表明：在这两个系列硼化物中La的价态均为+3价Sm的价态不随Sm含量的变化而变化，而Eu的价态随着Eu含量的变化而变化，随着Eu的含量的增加，Eu的价态逐步升高，当x=0.5时达到一极大值，然后随着Eu含量的增加Eu的价态逐步降低。

We performed a simulative test, which confirms that wavelet analysis can separate annual wobble and Chandler wobble. Our results show that this method can be used in astronomical geodynamies effectively. This paper is divided into two parts. The first is about statistic characteristic of polar motion. Polar motion includes secular motion, long period fluctuations, Chandler wobble, annual wobble and high frequency wobble. The secular motion is 3.4mas/year and towards 760W meridian. Long period fluctuations have difference periods in x-axis and y-axis. They are 31.7-year and 24-year in x-axis and 28.5-year and 22.9-year in y-axis. These 2~? decades fluctuations have an amplitude of about 30 mas , and are very nearly linearly polarized, with the observed motion of pole being almost entirely along a line between 360E and 1440W. There is a 55.4-year wobble whose amplitude is 9 mas. The amplitude of the interannual fluctuations is about 4? mas. The amplitude of long period fluctuations decreased after 1970. The annual wobble is a steady wobble. It retrograde wobble is only 1/20 of prograde wobble in amplitude.

本文的工作主要分为两部分：第一部分是通过分析POLE97序列，我们对极移的统计特性有了一个较全面的认识，极移主要包括趋势项、长周期项、Chandler项、周年项和高频项：趋势项的方向是西经76°，速度为每年3.4mas；长周期项中Markowitz 项在X、Y两个方向有不同的周期，它们分别是：X方向的两个周期是31.7年和24 年，Y方向的两个周期为28.5年和22.9年它们叠加在一起是一个线偏振运动，最大振幅约为30mas，偏振方向在西经144°和东经36°之间；极移的长周期波动中还存在一个 55.4年周期的圆周运动，振幅约为9mas；十年尺度变化的振幅在4～6mas之间，在Y 方向十年尺度的成份比较多，它们的周期在X方向和Y方向不是对应的；从七十年代年开始长周期变化的振幅明显降低；周年项是一个振幅稳定的摆动，在X、Y两个方向的振幅略有差别，逆向运动振幅大约为顺向运动振幅的1/20；Chandler摆动的振幅自1900年以来经历了几次较大的变化，其中包括1915年和1955年两次极大值，振幅分别达到0&。25和0&。28，以及1925～1940期间小于0.09的过程，Chandler项在X、Y 两个方向的振幅几乎完全相等，其逆向运动振幅不到顺向运动振幅的1/50。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。