查询词典 extrema

Narrow Line Seyfert 1s (NLS1s, including high luminosity quasars with similar properties) are very important extrema of type Ⅰ AGNs. The unusualness of NLS1s is very useful to test the viabilities of AGNs models and thus provide a new way probing into AGN phenomena. The ratio of Fe to α-element (e. g., O, Ne, Mg...), Fe/α, can serve as an excellent indicator for constraining the ages of star-forming systems.

中文题名窄线SeyfertⅠ星系与活动星系核光学FeⅡ发射线副题名外文题名论文作者周宏岩导师周又元王挺贵学科专业天体物理研究领域\研究方向学位级别博士学位授予单位中国科学技术大学学位授予日期2003 论文页码总数127页关键词活动星系核河外星系馆藏号BSLW /2003 /P15 /7 窄线SeyfertⅠ型星系(Narrow Line Seyfert 1，NLS1，包括具有类似性质的类星体)是具有极端性质非常重要的一类Ⅰ型AGN，对NLS1的深入研究是限制和完善活动星系核理论模型的一条新途径。

Objective To investigate the histomorphological changes of soft tissue after extrema expansion by overlapping tissue expansion.

目的：通过观察皮肤经重叠扩张至极限后的组织学变化。

If the inputted accelerations are velocity-zeroized and the Damage Value is calculated according to shear stress extrema, as to 100-meter-high earth dam, Multi-Point Effect is not distinct; But as to 240-meter-high earth dam, in the part where permanent displacement and Damage Value is originally bigger the response is less tenser than that by One-Point Input, and in the part near basement the maximal shear stress and Damage Value is bigger, that is the Multi-Point Effect in time domain.

频域内多点效应与时域内有不一致的地方，即对于240米高的超大型坝，摘要对于竖向永久位移最大的坝顶部位和损伤值原本就比较高的坝顶及斜坡部位，频域内多点输入比单点输入的永久位移和损伤值反应要大些。不一致的原因在于频域内多点作用是通过拟静应力实现的。

That means local extrema of histograms are sensitive to ±1 embedding method.

这意味着图像直方图及其小波直方图的局部极值对嵌入方法比较敏感。

However,it has to perform extrema envelope extending in every shifting process.

HHT方法在生物医学信号处理领域将会有广阔的应用前景。

GraphiCal has more than 50 built-in mathematical functions, and can integrate and find roots and extrema of functions.

图形有50多个内建在数学函数，并能结合并找到根源和极值的职能。

First six chapters include theory of fields and sufficient conditions for weak and strong extrema.

第一章包括六个领域和薄弱和强大的极值充分条件的理论。

Moreover, to avoid local extrema and speed up the registration process, the algorithm is performed in a multi-resolution manner.

为避免陷入局部极值并提高算法的运行速度，该方法在多分辨率策略下实现。

We shall subsequently obtain some interesting results on global extrema.

我们将不断地得出关于整体极值的某些有用的结果。

Economists are usually interested in global extrema.

经济学家经常碰到的是求整体极值。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。