查询词典 curves

In this chapter, three kinds of target recognition methods are performed, which are:①Target recognition method based on the description of polarization parameter plane. The echo polarization states of target are projected onto the polarization state plane described by the ellipticity ε and the tilt angle τ of the polarization ellipse, the change of parameter following ferquency becomes the chart. According to the changing trait of the chart, the multidimensional polarization feature space of target has been contructed. Furthermore, a series of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.②Target recognition method based on the description of Poincare polarization sphere. The echo polarization states of target expressed by Stokes vector are projected onto the Poincare polarization sphere. The conception of polarization ferquency stability, which is used in describing the dynamic distribution characteristics of the target echo polarization states on Poincare polarization sphere, has been defined. A group of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.③Target recognition method based on the description of frequency sensitivity. In accordance with the conception of the polarization state distance defined on Poincare polarization sphere, the frequency sensibility of the physical structure property of target has been investigated, the frequency distribution feature curves in PSD domain are obtained, and targets'features are extracted by means of the curve-fitting method with Least Square Criterion.

这章具体研究了基于三种极化散射特性描述的相应的目标识别方法：①基于极化参数平面描述的目标识别方法，将目标回波极化状态投影到以极化椭圆参数，即椭圆率角ε和倾角τ表征的极化状态平面上，参数随观测频率的变化就形成了图，根据图的变化特点构造了目标的多维极化特征空间，并提取了不敏感目标姿态变化的极化特征参数组来设计目标的识别器结构；②基于Poincare极化球面描述的目标识别方法，采用Stokes矢量表征目标回波的极化状态，并将其投影到描述极化状态的Poincare极化球面上，定义了极化频率稳定度的概念用以刻画目标回波极化状态在Poincare极化球面上的动态分布信息，提取了准方位不变性的目标极化特征，最后设计了目标的识别器结构；③基于频率敏感性描述的目标识别方法，通过在Poincare极化球面上所定义的极化状态距离的概念，研究的是复杂目标物理结构特性对探测信号频率的敏感程度问题，获得了在极化状态距离下的频率分布特性曲线，采用最小二乘估计曲线拟合方法，它既用于极化特征的降维，同时又直接将拟合参数作为目标的分类特征。

The results of GPC show that there are two different reaction mechanisms,linear condensation and cyclic reaction in the synthesis process,and the molecular weightreaches 1.17×105 and P d is 1.33.The DSC curves show that supercritical carbon dioxide can plasticize PC so that the T g of PC decreased.

凝胶渗透色谱测试表明，合成过程中存在线形缩聚和成环两种不同的反应机理，产物的重均分子量高达117740，分子量分布指数 P d=1.33；差示扫描量热法测试表明，超临界CO2能增塑PC致使其玻璃化转变温度降低。

From the results obtained it can be found that, in dispersion curves higher branches cut on as fluid waves and then quickly change their behaviour to that of shell waves described by plateaux, finally they convert to fluid waves again.

研究结果发现，频散曲线中高阶分支曲线所代表的波都是以流体型波开始传播的，然后再转变为平直段的壳体型波，最后又转变为流体型波。

How I envy the self-confidence of the French actress Emmanuelle Béart, who declared in an interview:"Look, I'm 40, this is my body, this is my plenitude, these are my curves, I like them and I'm proud of them."

我多么羡慕法国女演员艾曼纽·贝阿(Emmanuelle Béart)啊。她在一次采访中说："看吧，我今年40岁，这是我的身体，这是我丰满的躯体，这是我的曲线，我喜欢它们，我为它们而骄傲。"

Even though the hot Asian plumper is still growing, she's already got juicy curves and a lot of flesh for you to enjoy.

即使在炎热的亚洲丰满仍在增长，她已经有多汁的曲线和大量的肉供您欣赏。

From the diagram point of view, over the past 200 years, the Earth's average temperature and the solar magnetic field intensity curves are basically consistent.

提出这种假说的丹麦科学家推测，射向地球的宇宙射线可较稳定地使部分大气离子化，使云容易生成，从而吸收太阳的大量辐射，降低地球温度。

In terms of inflection point of apparent resistivity and half amplitude point of natural gamma curves can define its thickness.

利用视电阻率的拐点和自然伽马曲线的半幅点可以确定厚度。

See how Function curves work inside of a polar coordinates representation.

看看函数曲线范围内工作的极坐标系的代表性。

In the second chapter, we introduce the definition of polar form, the three representations of it and how to represent Bezier curves and surfaces by polar form.

第二章主要介绍了Polar形式的一些基本知识，包括Polar形式的定义、计算方法以及如何用Polar来表示Bézier曲线曲面。

Specifically, we apply the polar form in the conversion between triangular Bezier surfaces and rectangular Bezier surfaces. This problem helps us to understand the theory of polar form in a unified way. At the last half of this paper, we consider the problem of geometric continuity of parametric curves and parametric surfaces.

我们利用Polar形式实现了三角Bézier曲面和四边Bézier曲面之间的相互转化，同时通过应用，我们对Polar形式也有了一个统一、全面的认识；论文的后半部分考虑了参数曲线曲面间的几何连续性问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。