飞航导弹雷达截面预估

综合应用物理光学法（PO）、等效电磁流法（MEC）和几何光学法（GO）等高频分析方法,分析了导弹目标各部分散射场之间的相互干涉作用,计算了椭球体弹头、橄榄体弹头和半球体弹头三种不同形状弹头的导弹整体雷达截面（RCS）。计算结果表明该方法正确有效,可满足工程分析的需要。     

三星SGH-E530

体积轻盈的女性手机SGH-E530有着橄榄般的造型和充满活力的色彩搭配，同时，秀外慧中的整体功能特色，也让该机充满独特魅力。     

降雨的雷达体反射率研究

利用点匹配法计算了不同雨滴谱分布的降雨雷达体反射率，结果表明M—P分布与我国实测雨滴谱的结果比较接近，同时进一步分析了降雨雷达体反射率的频率、极化特性等。根据计算结果，研究得到了体反射率的新解析公式，其与点匹配法计算的结果有较好的一致性。     

PZT压电陶瓷粉体的制备工艺

综述了目前ＰＺＴ压电陶瓷粉体制备的方法，原理及其生产工艺，对各种方法的优点进行了评价；对共沉淀法制备ＰＺＴ压电陶瓷粉体的工艺进行了改进。     

水稻胚乳细胞淀粉质体被膜与其增殖的关系

水稻胚乳细胞经高锰酸钾固定法固定后，显示出十分清晰的内膜结构，尤其展现了淀粉质体被膜与淀粉质体增殖在结构上的密切关系。常见的淀粉质体出芽、缢缩和形成中间隔板的增殖方式分别与淀粉质体外层被膜、内外层被膜、内层被膜的活动有关。另外，淀粉质体外层被膜也能出芽，形成双层膜小泡，再积累淀粉形成淀粉质体；而淀粉质体内层被膜向内出泡或内外层被膜同时内陷，在淀粉体内形成新淀粉质体，这是淀粉质体增殖的两种新方式。对淀粉质体被膜在淀粉质体增殖中的作用进行了讨论。     

三星SCH-S159

如果你更注重手机的外观而非复杂的功能，那么机身酷似橄榄的三星CDMA新机SCH-S159将是一个不错的选择。实际上，除了经过哑光以及磨砂处理的优质涂层和1英寸的16级灰度蓝色OLED屏幕，这部轻巧的折叠手机在功能上确实乏善可陈。惟有一项自动更换屏保功能还略为有趣，     

时域玻恩迭代的改进方法

本文提出了一种能够加速收敛的助推法，把助推法应用于时域非线性优化方法求解二维有耗介质体的逆散射问题，获得了很好的结果。     

碳纳米管团聚结构的电镜研究

纳米聚团床催化裂解法制得的碳纳米管均以团聚体形式存在，本文利用电子显微镜观察了两种碳纳米管团聚体的团聚结构，分散形态及微观结构，研究表明，纳米聚团床催化裂解法制备的碳纳米管具有多级团聚结构，范德华力及缠绕作用共同造成了多级团聚体的形成，细长的碳纳米管分散困难，易絮凝；短小弯曲的碳纳米管易于分散。     

用表面激光处理消除玻璃的潜在损伤

本发明目的在于提供可以提高耐热性及耐激光、充分适宜作为电子仪器使用的玻璃加工处理方法。把玻璃坯料加热熔融，在玻璃熔融体粘性系数保持在l×107 (Polse)以下状态中用引上法或下降法固化上述玻璃融体，慢慢冷却后对上述固化玻璃体表面进行化学腐蚀，并对玻璃体表面进行激光照射处理。     

情迷西西里—听阿兰尼亚的西西里民族专辑

在意大利的南方，地中海的中央，有一个美丽的岛屿，叫西西里岛。那是一个辽阔而富饶的岛屿，气候温和，阳光明媚，那里有大片郁郁葱葱的橄榄树林，高耸而积雪的埃特纳火山，以及世界上最优美的海峡，除了这些自然风光之外，更让人着迷的是那些依山而建的色彩绚丽的建筑物。这些建筑中既有神圣的古希腊和古罗马遗迹，     

A comparison of measured radar cross section of solid and mesh ogives

An experimental program was conducted in which the radar cross section (RCS) of solid and mesh ogive models was measured and compared. The data covered an ogive length to wavelength ratio varying by a factor of 100. The various ogive models, the measurement ranges employed, and typical data are discussed in detail. Some of the conclusions drawn from the study are as follows. 1) For smooth ogives there is a substantial increase in RCS when part or all of its illuminated surface is replaced by mesh. At higher frequencies, the contribution to the RCS from the illuminated mesh area dominates; that from the shadow side is negligible even in the case of off-axis incidence. 2) The measured on-axis RCS of a mesh ogive exhibits oscillatory behavior about a mean value as the frequency is varied. Furthermore, it is found that this value agrees with that calculated for a rough ogive if the scale of roughness is properly chosen. 3) There is a frequency limit below which the mesh ogive RCS is identical to that of a solid ogive. At this frequency, the mesh opening along the axial geodesic direction is no larger than0.03lambda.     

半穿甲弹风帽气动特性分析

在半穿甲弹在敌方目标时,其弹头部的特殊穿甲形状可防止跳弹,但是在外弹道飞行时又会影响它的弹道性能。因此分析穿甲弹头部风帽对弹道的影响就至关重要。利用Fluent软件对半穿甲弹风帽进行外流场进行数值模拟,分析风帽表面流场分布,为风帽的外形设计而提供依据。     

EM programmer's notebook-benchmark radar targets for the validationof computational electromagnetics programs

Low- and high-frequency measurements are presented of five differently shaped targets: the NASA almond, ogive, double ogive, cone-sphere, and cone-sphere with gap. These were measured from 700 MHz to 16 GHz. The metallic targets are made of aluminum, and were cut by a numerically controlled mill to maintain the surface precision. Except for the almond target, all the targets were made in two parts and joined by sleeves and screws. The measurements are computational electromagnetics (CEM) validation measurements for the Electromagnetic Code Consortium (EMCC)     

Boresight errors induced by missile radomes

Radome induced boresight errors are defined in terms of antenna difference port to sum port voltage ratios. The antenna port voltages are derived using the reaction integral for the case of a planar waveguide slot array in the presence of a dielectric radome. Radome transmission uses planar slab results. Both the antenna reflection and the radome shadow contribution are taken into account. Although only linear copolarized comparisons are presented here, the analysis is kept arbitrary with respect to incident and seeker antenna polarizations. Measurements include a line source experiment that tests the antenna model sensitivity to geometry. A simple distributed source experiment, in the form of a planar slab radome with thickness corrugation, tests the influence of transmission through varying wall thickness. Effects of curvature are assessed with an offset hemisphere radome and finally a series of tangent ogive radome comparisons verify the limits of the analysis. A trend for the yaw errors to be less accurate than the pitch errors is consistently noted for the tangent ogive radomes, and this behavior is discussed.     

Finite-volume time-domain (FVTD) techniques for EM scattering

The authors document our efforts to compute radar cross sections using a generalization of the FDTD (finite difference time domain) Yee algorithm (1966) in which a nonorthogonal target-conforming mesh may be applied. Both 2D and 3D formulations are presented, although at present they only have 2D numerical results. Two-dimensional problems considered involve an S-shaped duct (S-duct) and an ogive. At least nine distinct resonances are correctly predicted by the S-duct model. The primary goal is to model oblique or curved surfaces without the use of staircasing     

An investigation of new FETD/ABC methods of computation ofscattering from three-dimensional material objects

Finite-element time-domain (FETD) and absorbing boundary condition (ABC) methods for computation of scattering from three-dimensional (3-D) material objects are developed and investigated. The methods involve discrete-time FETD solution of the time-domain Helmholtz equation in a region that comprises the 3-D scatterer and its immediate vicinity. Coupling of the solution to the surrounding infinite space is achieved through the ABC. This FETD/ABC formulation is examined for a number of various geometries: sphere, plate, and ogive     

渐变折射率双包层光纤吸收效率的波动理论分析

用已知的积分公式计算了光纤中的总模数;用WKN方法推导了2个积分,分别用以计算两部分不能被双包层光纤(DCF)纤芯吸收的模式数量;最后将不被吸收的模式数与光纤总传播模式数作比较,得出渐变折射率DCF的吸收效率。给出了计算实例．讨论了吸收效率与渐变折射率参数及纤芯偏心距离之间的关系。     

格点形状和取向对二维光子晶体禁带的影响

以椭圆形和正方形介质柱组成的二维正方晶格为例,讨论了格点形状和取向变化时对光子晶体能带的影响,对比分析了波矢在周期性平面和不在周期性平面2种情况下的能带图.计算表明：格点形状和取向的适当变化可以使没有完全带隙的光子晶体出现完全带隙,低阶的完全带隙转变成高阶完全带隙.此外,经对比发现：波矢偏离周期性平面对椭圆形介质柱的正方晶格形成的完全带隙的影响,要比正方形介质柱正方晶格的完全带隙的影响要大得多.     

The geodesic constant method: a novel approach to analyticalsurface-ray tracing on convex conducting bodies

A generalized approach to analytical surface-ray tracing in three dimensions, and a review of its application to convex conducting bodies, is presented, using the Eisenhart coordinate system. The ray-parameters so obtained, for quadric cylinders (QUACYLs) and surfaces of revolution (QUASORs), are in a one-parameter form for UTD mutual-coupling applications. The ray analysis is also extended to the hybrid QUACYLs (e.g. aircraft wings) and hybrid QUASORs (e.g., satellite-launch vehicles), by introducing Hertz's principle of particle dynamics to EM theory. This mathematical formulation is applicable even to other important non-Eisenhart surfaces, such as the ogive. A summary of the mathematical formulations is included     

行波电极型BOA光开关的研制

设计了行波电极型GaAs异质结材料BOA光开关;采用谱域法分析和设计了平面微带线结构(PMS),并应用转移矩阵理论和有效折射率法计算和分析了电极结构与器件半波电压和串音度的关系。结果表明,采用PMS结构器件的3dB带宽可达到20GHz;电极位置的对称性对器件串音度起决定性的影响,采用本文提出的电极对准工艺,能够得到小于—40dB的串音度。