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- The average power pattern of the Side-Fed Offset Cassegrain(SFOC) dual reflector antenna is analyzed,and the effect of the random surface error on radiation characteristics of the antenna is addressed. 以侧馈偏置卡塞格伦双反射面天线为对象;通过数值计算方法分析了该天线的平均功率方向图;研究了反射面随机表面误差对天线辐射特性的影响.
- random surface error 随机表面误差
- Effects of random surface errors on radiation characteristics of the side-fed offset cassegrain antenna 表面误差对侧馈偏置卡塞格伦天线辐射场的影响
- The total dislocation length per unit volume of material; alternately, the number of dislocations that intersect a unit area of a random surface section. 材料单位体积内的位错线的总长度，或者在一个随机切面上的单位面积内切断的位错根数。
- The total dislocation length per unit volume of material, alternately, the number of dislocations that intersect a unit area of a random surface section. 在单位体积材料中包含位错的长度,或者说在材料内部任意单位截面上位错线的根数。
- Then based on the Gauss random facets statistical scattering physical model,the calculation model for Gauss random surface of spatial objects that is made from planes is derived. 在高斯随机面元统计散射模型的基础上,提出了目标表面为随机粗糙平板面的空间目标散射太阳光产生地面光照度的散射计算模型。
- In this paper, with the Discrete Fourier Transform description of elements group curved surface, two kind of curved surface error are defined. 本文在基本体群形状和工件形状的离散傅立叶变换描述的基础上，定义了不同类型的曲面误差；
- Aspheric lens is being applied more and more widely,surface error is an important quality issue,and surface testing method is also very important. 非球面镜片的应用越来越广泛,面形误差是影响非球面质量的重要指标,所采用的面形检测方法非常重要。
- According to the technical process of ion beam etching on Diffractive Optical Element (DOE), a distribution of surface error in ion beam etching was presented. 摘要针对衍射光学元件(DOE)的离子束刻蚀工艺，结合掩模套刻过程实例，本文提出了刻蚀误差面形分布的概念。
- Our experimental results show that the anomalous magnetic properties are due to the non-uniform particle size distribution, random surface anisotropy and interparticle interactions in the films. 研究表明;这一奇异的矫顽力特性与液相基底表面铁薄膜中的原子团簇尺寸分布、无序的薄膜表面磁各向异性以及团簇间的磁性相互作用等因素有关.
- The error value by error formula calculated is used which adjusts adjustment framework of machine, that can get purpose of decreasing surface error and guaranteeing surface precision of part. 并以误差公式计算出的误差值来调整机床的微调机构，可达到减少面形误差，进而保证面形精度的目的。
- The method was introduced in this paper by using the leveling-up equipment to control the ISA copper electrobath surface error 。It was proved to be effect by locale measuring and technics operating. 本文介绍了通过采用找平装置来控制ISA法铜电解槽槽面水平误差的方法,通过现场测量及工艺操作证明是行之有效的。
- New and sophisticated techniques have invaded statistical physics, ranging from algebraic methods in integrable systems to fractal sets or random surfaces. 金开诚，江苏省无锡市人。1932年生，1955年年毕业于北京大学中文系，留校任教。
- Soiled dishes were piled at random. 脏碟子胡乱地堆放着。
- In order to guarantee surface precision of using locus shaping method machining optical parts, the factors of fine grinding machine which affects surface error of part is theoretically analysed. 为了保证用轨迹成型法加工光学零件的面形精度，对精密磨削机床影响工件面形误差的因素进行了理论分析。
- Obtaining the spectrum of Zernike polynomials is the key to fit the surface errors by Zernike polynomials correctly. 获得泽尼克多项式的频谱信息是正确利用该多项式进行误差拟合的关键。
- The effects on straightness measurement are analyzed for the cube-corner retroreflector with angle errors, surface errors, yaw, pitch and roll. 分析了角锥棱镜的制造角差、面形误差和测量过程中角锥棱镜的偏摆、俯仰、滚转对直线度测量的影响。
- The librarian took a book at random from the shelf. 图书管理员从书架上随便拿了一本书。
- Random mating within a breeding population. 自由交配在一个育种群中自由交配
- The gas bubbled to the surface of the water. 气体变成气泡升上水面。
