查询词典 solution plane

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。

Because the gesture recognition is based on the plane characteristics, so it can only send the input information based on the plane projection of the hand, this constrain the operation in the 3D environment and limit the users input information.

然而，现阶段的手势识别都是基于平面特征，用户只能根据手的平面投影作为识别输入接口进行操作，这大大限制了用户在三维空间信息输入的可操作性。

As the projector can conceptually be regarded as camera acting in reverse, the relation between projection plane of the projector and imaging plane of the camera is fixed.

进而， 利用投影仪的投射过程是摄像机成像过程的逆过程，建立投影仪的投射平面和摄像机的成像平面的对应关系，将"极线几何约束"应用到基于条纹投影的主动三维视觉的姿态估计问题，并在考虑测量数据受噪声影响的条件下，建立了求解视点姿态参量的数学模型。

A new method——" projection plane transforming method", is the key to ascertain the position of the transformed projection plane which makes the projection of the intersectional trajectory be a circle.

采用换面法求解直线与椭圆球面的交点，关键在于确定被改换投影面的位置，使截交线在投影面上的投影为圆。

Service plane can support the access of application to network core resources and the operation of the third part service developer. So the development of new service is quickened. Service plane also helps to coordinate the trust and interconnection of different management domains and optical networks with different switching mechanisms.

业务功能不同粒度的划分和分布，可以提高业务运行效率并实现业务的定制和组合；业务平面可以支持应用对网络核心资源的访问，以及第三方业务开发商的运作，从而加快新业务的开发；业务平面对协调不同管理域和不同交换结构的光网络的互信、互通也会有积极的影响。

The recess (13) has a bottom surface (14) transverse to the plane of symmetry and substantially parallel walls (15) along said plane.

该凹槽(13)有一个横切对称平面的底面(14)和与所述对称平面基本平行的内壁(15)。

Preformed malleable dental crowns with a side-generic external shape with a plane of symmetry in the facial-lingual direction and/or a plane of symmetry in the mesial-distal direction.

具有在颊舌方向上的对称面和/或近远中方向上的对称面的侧面通用外形的预制的可煅的牙冠。

Tom: You are right, he worked hard all the time.

你是对的。他一直都是努力工作。

Take shortcomings,failures,and mockings of others as commonplace and a drive to complete oneself,hold your own opinion over the evalution and disscution divested from others,afterwards sink into the state of eliminate mistakes if any or encourge oneself being not being influenced by the sayinngs of others or having no ideas to do.

把缺点、失败及别人的耻笑等看成是一种常事，当成完善自己的动力，对别人的评价和议论自己心中有主见，做到&有则改之，无则加勉&，不为人言所左右或无所适从。