查询词典 background plane

Any vertex closer to the mirror plane, than the limit we set, will be placed exactly on the mirror plane.

任何与实际对称平面距离小于我们所设置的重合范围的点都将会直接放在对称平面上。

The Ti-sapphire resonance cavity is composed of second plane reflector, Ti-sapphire crystal and second plane output mirror.

钛宝石谐振腔由在光路上依次连接的第二平面反射镜、钛宝石晶体和第二平面输出镜组成。

By analyzing the inherent relationship among the image plane,the mirror plane and the correspondences,this paper puts forward a novel way for 3D hand reconstruction,which not only facilitates theoretically analyses for further research,but also make it easy to reconstruct a 3D object with high accuracy.

1引言人机交互和信息处理是21世纪公认的四项重大技术之一，基于视觉的自然手的重建和识别是实现自然和谐的人机交互系统的一个关键问题，也是进一步进行基于视觉的虚拟手研究中要解决的一个瓶颈问题。

The temperature control system of reflective plane mirror is researched and completed. It is the first time to complete the close loop correction experiment of reflective plane mirror thermal distortion by means of adaptive optics in our country.

设计完成了平面反射镜温度变形的自适应光学闭环校正实验系统，研制完成了平面反射镜温度变形的可控加温系统，在国内首次完成了平面反射镜温度变形的自适应光学闭环校正实验。

At the end of mirror plane prompt, drag the mirror plane with ortho and pick a point as shown in the illustration.

在结束镜像平面的提示下，打开正交拖拉镜像平面，如图所示挑选一个点。

The totally reflected beam by a dielectric interface actually exhibits a lateral shift from the position of geometric reflection in the plane of incidence,and a transverse shift normal to the plane of incidence.

光束在电介质界面发生全反射时，实际反射光束会在入射面内相对于几何反射光束产生一侧向位移，在垂直于入射面的方向产生一横向位移。

Projectors and monitoring hydrophones are placed n a chamber along its length. The projectors are driven By the required drives that are calculated aceording to a measured transfer matrix, and amplitude, frequency and incident of the predicted plane wave. Then the acoustic pressure field distribution which is equivalent to the predicted plane wave of any incidence is set up in the chamber. A prototype calilbration system has been developed.

在管中沿管轴方向布置一系列发射换能器和监测水听器，根据实测得到的传递函数矩阵和所要模拟的平而波频率、幅度和入射角计算得到一组发射换能器驱动信号的幅度和相位，然后以此信号激励每个发射换能器，就能在管中形成一个等同于任意角度入射的自由场平面波声场的声压分布。

An optical element such as a rear projection screen for an image display device comprises at least two substantially rigid sheet members each having a first major surface and a second major surface providing a plane of incidence and a plane of emergence, respectively, through which light is transmitted sequentially. A first sheet member comprises a Fresnel lens, and a second sheet member comprises a lenticular lens array on each of the major surfaces thereof.

一种光学元件，例如用于图象显示装置的背投式屏幕（1），包括至少两个基本为刚性各具第一主表面（21；31）和第二主表面（22，32）的板部件（2；3），分别提供顺序穿过光线（10）的入射面和出射面，第一板部件（2）和第二板部件（3）在其各个主表面（31，32）上分别包含一个菲涅耳透镜（24）和一个双凸透镜阵列33，35。

Since the plane of polarization depends on the Sun's position in the sky, any animal that can detect the plane of polarization can easily determine where the Sun is.

由于偏振面取决于太阳在空中的位置，所以，任何能够观察到偏振面的动物，它们要确定太阳的位置都会很容易。

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。

As a dominant party,CPC government should play a guardian,supervisee and guarantee role to overcome all the difficulties in the development of charitable cause and bring it into full play in the establishment of harmonious society on policies and regulations basis.

在中国共产党的文献中第一次把发展慈善事业提到&最广泛最充分地调动一切积极因素，不断提高构建社会主义和谐社会的能力&的高度来认识。近年来，社会学界对慈善事业的理论专著发表较多，有鉴于此，笔者不揣浅陋，谈谈自己的认识和见解。

Flow through the land, the land of the scale of operation allows the effectiveness of the land may be raised.

通过土地的流转，土地的规模经营可以让土地的效益得到提升。