查询词典 sphere

In inertia system K,geometric sphere is changed to elliptic sphere in K system by Lorentz transformation ,and the pre-sphere of optical wave in K system is changed to sphere in K system.

对惯性系K中的几何球面施以洛仑兹变换，在K′系得到扁椭球面；对K中的光波前球面，在K′系则得到球面；两者皆源于时空的基本属性，但前者是由于物体长度的相对性，后者则是由于光速的不变。

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。

In order to reduce the effect of imaging recognition error, the recognition location of projection is extended and refined, and the projection edge of sphere centre is implanted. So a pyramid is formed by radial line between the camera optical centre and the implanted point. A curved face is formed by the two pyramids and barbette sphere. To calculate the shape centre of the common section of the curved face, the shape centre is the coordinate of sphere centre.

为了降低图像识别误差的影响，对投影的识别位置进行拓展和细化，并对球心投影边界进行插值，摄像机光心与插值点连线射线形成了一个锥体，两摄像机的锥体分别与炮台球面相交形成曲面，计算两曲面公共部分的形心，即为球心位置。

In-vivo neutron and gamma spectra of depleted uranium sphere and vanadium sphere under central D-T neutron source were measured,with a 18 mm×20 mm stilbene crystal detector, at 7,10,13,16,19,22 cm away to the center in 45° direction in depleted-uranium sphrer, and 1.8,4.8,8.3 cm away to the center in the 0° direction in V sphere.

为获得介质内中子能谱及伴生γ能谱的实验数据，在中心D-T中子照射下，用18 mm×20 mm的茋闪烁体探测器，测量了与D+束成45°角的水平方向距球心7、10、13、16、19、22 cm位置处贫化铀球介质内的中子能谱和伴生γ能谱，以及钒球内与D+束成 0°角、距离球心1.8、4.8和8.3 cm处的中子能谱和伴生γ能谱。

In strictly, it is hard to make the light normal incident into the sphere, double refraction will take place in crystal sphere when a TEM〓 mode Gaussian beam oblique incident into the sphere, and the two orthogonal polarized beams are both elliptical Gaussian beam. The ellipticity and eccentricity of the elliptical Gaussian beam will change with the incident angle, and for a fixed incident angle, they will change with the shifting of incident beam waist position.

由于严格意义上的正入射较难实现，基模圆高斯光束斜入射晶体球后将在球内产生双折射，且球内偏振态正交的两束折射光都将是椭圆高斯光束，它们的椭圆度e和偏心度Δ随入射角的改变而改变，在入射角一定的情况下，入射光束束腰的移动也将改变这两束折射光的椭圆度e和偏心度Δ。

Greater East Asia Co-Prosperity Sphere is based on the so-called "liberation of the colonial and mutual respect for each other's independence," called for, but the Greater East Asia Co-Prosperity Sphere of Independent States is controlled by the Japanese army or part of the control, and the Greater East Asia Co-Prosperity Sphere British Malaya and the Dutch East Indies the Japanese side did not make it independent; despite the end of the war in Japan to change its goals, prepared to allow the independent island of Java.

虽然大东亚共荣圈是以所谓"解放殖民地、相互尊重彼此独立"为号召，但是大东亚共荣圈中的独立国家却是由日本军队掌控或部分掌控，而且大东亚共荣圈内的英属马来亚与荷属东印度群岛日方也没有使其独立；虽然日本在战争末期改变其目标，准备让爪哇岛独立。

Sphere Grid System, Hexagonal Grid, Address Coding, Sphere Spatial Entity, Sphere Grid Indexing

球面网格系统；六边形网格；地址编码；球面空间实体；球面网格索引

Chapter 2: Expatiate on the basic theory of the GRIN micro-sphere-lens, especially on the classical model—MAXWELL fisheye lens, which demonstrates their excellent optical properties.Chapter 3: Simply introduced the concept of retro-reflection, retro-reflection materials, the fabrication of traditional glass sphere and the possibility of the application of GRIN polymer micro-sphere on retro-reflection.

第三章：介绍了回归反射的概念、回归反射材料的现状；研究了用麦克斯韦鱼眼微球制作回归反射材料的可能，并与传统的均匀折射率玻璃微球回归反射材料的性能作了比较，得出将麦克斯韦鱼眼微球用作回归反射材料不仅可以大幅度降低原先对材料折射率的过高要求，还可明显提高回归反射的效率的结论。

After carding the development of the public sphere and the theory of contact behavior, this essay takes "Face-to-face" as a case and launches a practical and specific analysis from the public topic, the reporter's question , the interviewee's reply, bilateral gambling in sub-topic, dialog in the absence of audience and so on. This essay is trying to build a speech act classification system about the On the spot dialogue between reporter and the interviewee in television public sphere, and not On the spot dialogue between program and audience. Moreover, on this basis the essay discourses the structure reforming characteristics in television public sphere.

中文摘要论文在梳理公共领域与交往行为理论的发展脉络之后，以《面对面》为个案，从公共性话题、记者提问、访谈对象回答、双方在子话题上的博弈、受众的不在场对话等5个方面展开了实证的、具体的分析，试着建立电视公共领域中记者与访谈对象的在场式对话、节目与受众之间的不在场式对话的言语行为分类体系，并在此基础上论述了电视公共领域的结构转型特点。

Linken's Sphere This magical sphere once protected one of the most famous heroes in history. L inken's Sphere has the power to negate most targeted spell once every minute.

(2100)(1325)林肯法球在历史上曾经守护过许多传奇英雄的神奇法球，林肯法球能在每分钟抵销大多数指定性的法术。

They experience feelings deeply and intensely, and their emotions are often mercurial.

他们的感情深刻而强烈，情绪善变。

Surrounded with or as if with a rampart.

用城墙围绕的用城墙围绕的或类似于为城墙围绕的