查询词典 space plane

The characteristics of the waves guided along a plane interface which separates a semi-infinite region of free space from that of a magnetoionic medium are investigated for the case in which the static magnetic field is oriented perpendicular to the plane interface.

沿平面界面分开的磁离子中，一个半区的空间是无限的，其中静态磁场导向的垂直平面接口个案调查指导波的特点。

A recognition method of discrete points on trimmed surface is presented, which is based on the plane domain of surface parameter. The approach changes the recognition from the complex 3D space to the simple parameter plane artfully.

针对目前常用商业CAD系统在复杂参数曲面有效离散方面所存在的不足，结合实际工程设计与应用方面的需要，提出了一种基于二维参数域的裁剪曲面有效离散点的识别方法。

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 new theory unifies a series of the single nonlinear strength theories for various concrete materials, which includes the whole region between the upper-limit Mises circular and the lower-limit SMP curve on the π plane of principal stress space, and the strength curves on the meridian plane are the exponential functions.

该理论在主应力空间的π平面上含盖了从下限SMP曲线到上限Mises圆之间的所有区域，子午面上的破坏曲线为幂函数形式；共有四个材料参数，均具有明确的物理意义，并给出了参数的确定方法。

On the basis of investigating the sound field of a plane piston transducer and the relations between sound field and radiation force, by settling four plane piston transducers driven at the same frequency at each corner of a regular triangular pyramid with their sound-beam axes crossing at the center of the pyramid, this technique uses ultrasonic wave synthetic theory to acquire a three-dimensional ultrasonic standing wave field. The micro-component can be captured, transported, released in the range of space by adjusting the phase of the transducers.

在研究单个圆形平面活塞换能器声场分布以及声场和辐射力关系的基础上，将以相同频率驱动的4个平面活塞换能器呈正四面体放置，利用声波合成原理获得三维超声驻波场，通过调整各个换能器发射信号相位之间的关系实现对微构件在空间范围内的俘获、移动、释放等操纵。

In order to locate the human structure in 3-dimensional space precisely and to compare the data set among different individuals conveniently, we suggested and created a universal coordinate system of the human body in which the pubic symphysis horizontal plane was determined as the universal standard original zero plane.

为了确定人体结构在三维空间中的准确定位以及在不同个体之间便于比较，文中提出和建立了可视化人体的整体坐标系统。

A perpendicular,especially a perpendicular to a line tangent to a plane curve or to a plane tangent to a space curve.

正交一条垂直线，尤指一条相对一条平面曲线的切线垂直线或一条相对一条空间曲线的平面切线垂直线

Mathematics A perpendicular, especially a perpendicular to a line tangent to a plane curve or to a plane tangent to a space curve.

正交：一条垂直线，尤指一条相对一条平面曲线的切线垂直线或一条相对一条空间曲线的平面切线垂直线

The common capacitance sensor is composed of two-electrode planks which vary in shape and can be fixed in different plane of space. The driving and inductive electrode pole placed in the same plane of the uniplanar scattering-field capacitive sensor. The electric field presents scattering. As the shape of power line in the electric fields is like semicircular arc or ellipse, there is some limits in the measurement depth of uniplanar scattering-field capacitive sensor, and its penetration depth is equal to 2/3 of center distance of adjacent driving and irritable electrode pole.

电容传感器是由两极板组成，极板的形状有多种，两极板一般位于不同的空间平面；而同面散射场电容传感器的驱动电极和感应电极位于同一平面，其电场呈散射状，电场的电力线近似半圆弧形或椭圆形，因而其测量穿透深度是有一定限制的，是相邻驱动电极和感应电极中心距的2／3。

Because of limitation of space dimension, the paper proffers a program-add reflector switch near the image plane to implement the switchover of the focal plane, in which position precision is paramount after switch.

基於空间尺寸的限制，提出了通过在像面附近增设反射镜切换方案实现焦面的转换，焦面的转换过程中最重要的是切换后的定位精度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。