查询词典 three-dimension space

The physical property of the material,the space structure and the boundary condition are three important parts of the guided-wave system.

材料的物理属性、结构的空间表现和系统的边界状态是波导系统的3个组成要素。

Soil physico-chemical properties and variability in space and time in tillaged-layer of paddy, dry field and vegetable field in different physiognomic areas were analyzed. The variation characteristics for various soil nutrient elements in the three different types of farmland before and after twenty years were explored and compared.

不同区域间表现出江汉平原及鄂中丘陵区，高产田面积大(占70％以上)，而鄂东沿江丘陵区中低产田所占比例大(占75％以上)。20年间不同区域耕地地力变化表现出，丘陵区耕地面积大幅减少，耕地质量明显下降；平原区耕地面积虽有所减少，但减幅不大，耕地数量和质量保持基本稳定。2。

But in their great mercy and tenderness of heart, they have doom ed Mistress Prynne to stand only a space of three hours on the platform of the pillory,

但是，由于他们心肠软，大慈大悲，只判了白兰太太在刑台上站三个小时

But in their great mercy and tenderness of heart, they have doomed Mistress Prynne to stand only a space of three hours on the platform of the pillory,

但是，由于他们心肠软，大慈大悲，只判了白兰太太在刑台上站三个小时

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。

Guangzhou Opera House as a space of steel structural engineering folded plate three-way combination of oblique lattice structure, the structure inside through the triangle plane reduced grid.

广州歌剧院钢结构工程为空间组合折板式三向斜交网格结构，结构内部通过三角形平面折合成网格。

C values plotted against δ 15 N indicated significant partitioning in two-dimensional space among the three carnivores.It was reasonable to propose a food resource partitioning among alpine weasel,steppe polecat and upland buzzard,which partially revealed their co-existence mechanisms.

3种食肉类的稳定性碳和氮同位素分布模式在二维空间上存在明显分割，由此说明，香鼬、艾虎和大之间存在明显的食物资源分割现象，同时也反映了三者在高寒草甸生态系统内共存的基础。

Wang Hui, utilizing the shell of an old garage enhanced with new architectural concepts. Seen from the outside it is a huge silver cube; its inside comprises three exhibition halls with different sizes and a projection room. The entire space covers 800 sq.m.

它是一组老车库与新建筑的组合，空间外部呈现为一个完整的巨大银色立方体，内部依据功能，划分为3个不同大小、高低渐变的展厅及一个影像放映室，总面积为800平方米。

Besides, three new properties of the pencil formed by two quadrics have also been put forward in 3D real projective space in this thesis.

除此之外，本文还给出了两二次曲面形成的二次曲面束在实射影空间的两个新的性质。

Instead of performing in a space surrounded by an audience on three sides, sometimes seated in raised galleries, dancers now were separated from their audiences and framed by a proscenium arch and viewed frontally Movement in the frontal plane replaced floor pattern as the most visible spatial effect.

而在表演空间，三面包围观众，有时坐在提高画廊，现在舞者们离开了观众和装裱前台拱正面看待额叶运动机更换地板作为最看得见的空间格局。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。