Design Methodology of the Structure of Postal Express Mail Networks of Aviation Channels in China

1　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｏｒｄｅｒｔｏｉｍｐｒｏｖｅｔｈｅｑｕａｌｉｔｙｏｆｐｏｓｔａｌｓｅｒｖｉｃｅａｎｄｔａｋｅａｄｖａｎｔａｇｅｏｆａｕｔｏｍａｔｅｄｍａｉｌｓｏｒｔｉｎｇｅｑｕｉｐ ｍｅｎｔｓ,ｉｔｈａｓｂｅｅｎｄｅｔｅｒｍｉｎｅｄｔｏｃｏｎｓｔｒｕｃｔｔｈｅｐｏｓｔａｌａｒｅａｃｅｎｔｅｒｏｆｆｉｃｅｓｙｓｔｅｍｉｎＣｈｉｎａＰｏｓｔａｌＳｅｒ ｖｉｃｅ (ＣＰＳ) .ＴｈｅｃｒｕｘｏｆｔｈｅｐｒｏｂｌｅｍｆａｃｅｄｂｙＣＰＳｉｓｔｏｒｅｄｅｓｉｇｎｔｈｅｐｏｓｔａｌｃｏｍｍｕｎｉｃａ…     

Compressed Digital Video:Accelerating the Video Communications Revolution

ＣｏｍｐｒｅｓｓｅｄＤｉｇｉｔａｌＶｉｄｅｏ：ＡｃｃｅｌｅｒａｔｉｎｇｔｈｅＶｉｄｅｏＣｏｍｍｕｎｉｃａｔｉｏｎｓＲｅｖｏｌｕｔｉｏｎＷｅｎＨ．Ｃｈｅｎ（ＣｏｍｐｒｅｓｓｉｏｎＬａｂｓ，Ｉｎｃ．２８６０ＪｕｎｃｔｉｏｎＡｖｅＳａｎＪｏｓｅ，ＣＡ９５１...     

《红外与毫米波学报》第五届编辑委员会

Ｅｄｉｔｏｒ ｉｎ Ｃｈｉｅｆ (主编 )ＣＨＵＪｕｎ Ｈａｏ(褚君浩 )ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｉｃａｌＰｈｙｓｉｃｓ ,ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ4 2 0ＺｈｏｎｇＳｈａｎＢｅｉＹｉＲｄ ,Ｓｈａｎｇｈａｉ 2 0 0 0 83,ＣｈｉｎａＥｘｅｃｕｔｉｖｅＥｄｉｔｏｒ ｉｎ Ｃｈｉｅｆ (执行主编 )ＭＩＺｈｅｎｇ Ｙｕ(糜正瑜 )ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｉｃａｌＰｈｙｓｉｃｓ ,ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ4 2 0ＺｈｏｎｇＳｈａｎＢｅｉＹ…     

CCII-Based Continuous-Time Current-Mode Biquad Filter

ＣＣＩ┐ＢａｓｅｄＣｏｎｔｉｎｕｏｕｓ┐ＴｉｍｅＣｕｒｅｎｔ┐ＭｏｄｅＢｉｑｕａｄＦｉｌｔｅｒＭａｎｕｓｃｒｉｐｔｒｅｃｅｉｖｅｄＪｕｎ．２９，１９９６．Ｔｈｉｓｗｏｒｋｉｓｓｕｐｐｏｒｔｅｄｂｙｔｈｅｓｃｉｅｎｃｅａｎｄｔｅｃｈｎｏｌｏｇｙｆｏｕｎ...     

NONDESTRUCTIVE BAND—GAP PROFILE DETERMINATION OF HgCdTe LPE CROWN LAYERS

ＩｎｔｒｏｄｕｃｔｉｏｎＭｏｓｔｏｆｍｏｄｅｒｎＨｇ1-ｘＣｄｘＴｅｔｅｒｎａｒｙｃｏｍｐｏｕｎｄＩＲｐｈｏｔｏｄｅｔｅｃｔｏｒｓａｒｅｍａｎｕｆａｃｔｕｒｅｄｆｒｏｍＬＰＥｆｉｌｍｓｇｒｏｗｎｏｎＣｄＴｅａｎｄＣｄＺｎＴｅｓｕｂｓｔｒａｔｅｓ[1～ 4 ] .Ｃｏｍｐｏ ｓｉｔｉｏｎａｌｄｅｐｔｈｎｏｎｕｎｉｆｏｒｍｉｔｙｓｅｅｍｓｔｏｂｅａｎｉｎｈｅｒｅｎｔｆｅａｔｕｒｅｏｆｔｈｅｓｅｆｉｌｍｓ[5,6 ] .Ｉｔｃａｕｓｅｓｔｈｅｖａｒｉａｔｉｏｎｓｏｆｂａｎｄ ｇａｐｗｉｔｈｔｈｅｄｅｐｔｈ ,ｔｈｕｓａｆｆ…     

电视技术常用术语中英文对照表

ＡＡ(ＡｒｔｉｆｉｃｉａｌＡｎｔｅｎｎａ)仿真天线 　ＡＢＣ(ＡｕｔｏｍａｔｉｃＢａｎｄｗｉｄｔｈＣｏｎｔｒｏｌ自动带宽控制 　ＡｕｔｏｍａｔｉｃＢａｓｓＣｏｍｐｅｎｓａｔｉｏｎ自动低音补偿 　ＡｕｔｏｍａｔｉｃＢａｓｓＣｏｎｔｒｏｌ自动低音调整 　ＡｕｔｏｍａｔｉｃＢｒｉｇｈｔｎｅｓｓＣｏｎｔｒｏｌ自动亮度控制 　ＡＢＣＣ(ＡｕｔｏｍａｔｉｃＢｒｉｇｈｔｎｅｓｓＣｏｎｔｒａｓｔＣｏｎｔｒｏｌ)自动亮度对比度调整 　ＡＢＬ(ＡｕｔｏｍａｔｉｃＢｒｉｇｈｔｎｅｓｓＬｉｍｉｔｅｒＣｉｒｃｕｉｔ)自动亮度限制电…     

An Acquisition Performance Analysis of DS-MC-CDMA System under Multiple Access Interference Conditions

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＭｕｌｔｉ ＣａｒｒｉｅｒＣｏｄｅＤｉｖｉｓｉｏｎＭｕｌｔｉｐｌｅｘｉｎｇＡｃｃｅｓｓ(ＭＣ ＣＤＭＡ)ｓｐｒｅａｄｓｐｅｃｔｒｕｍｃｏｍｍｕｎｉｃａ ｔｉｏｎｓｙｓｔｅｍ ｐｒｏｖｉｄｅｄｆｏｒｔｈｅＴｈｉｒｄＧｅｎｅｒａｔｉｏｎｍｏ ｂｉｌｅｓｙｓｔｅｍｈａｓｇａｉｎｅｄｗｉｄｅａｃｃｅｐｔａｎｃｅｏｗｉｎｇｔｏｉｔｓａｂｉｌｉｔｙｔｏｃｏｍｂａｔｍｕｌｔｉｐａｔｈｆａｄｉｎｇｉｎｗｉｒｅｌｅｓｓｃｈａｎ ｎｅｌｓ.Ｓｏｕｒｏｕｒ[4] ｐｒｏｐｏｓｅｓａｎｅｗｋｉｎｄｏ…     

The Study on Heterodyne and Phase Diversity Coherent Optical Fiber Communication Systems and Their Components

ＡｂｓｔｒａｃｔＴｈｅｒｅｓｅａｒｃｈｉｎＣｏｈｅｒｅｎｔＯｐｔｉｃａｌＦｉｂｅｒＣｏｍｍｕｎｉｃａｔｉｏｎＳｙｓｔｅｍｓ（ＣＯＦＣＳ）ｕｓｉｎｇｌｏｎｇｗａｖｅｂａｎｄｓｅｍｉｃｏｎｄｕｃｔｏｒｌａｓｅｒｄｉｏｄｅｓａｓｔｒａｎｓｍｉｔｅｒａｎｄ...     

Analysis of Crosstalk Induced by Optical Cross-Connection in Multiwavelength Networks

ＡｎａｌｙｓｉｓｏｆＣｒｏｓｔａｌｋＩｎｄｕｃｅｄｂｙＯｐｔｉｃａｌＣｒｏｓ－ＣｏｎｎｅｃｔｉｏｎｉｎＭｕｌｔｉｗａｖｅｌｅｎｇｔｈＮｅｔｗｏｒｋｓＳｈｅｎＸｉａｏａｎｄＹｅＰｅｉｄａ（ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＰｏｓｔｓａｎｄＴｅｌｅｃ...     

An Encoder/Decoder Scheme of OCDMA Based on Waveguide

1　ＩｎｔｒｏｄｕｃｔｉｏｎＯｐｔｉｃａｌＣｏｄｅＤｉｖｉｓｉｏｎＭｕｌｔｉｐｌｅＡｃｃｅｓｓ(ＯＣＤ ＭＡ)ｓｙｓｔｅｍｓｈａｖｅｂｅｅｎｉｎｖｅｓｔｉｇａｔｅｄ[1 ] .Ｍａｎｙｅｎ ｃｏｄｅｒｓ/ｄｅｃｏｄｅｒｓｈａｖｅｂｅｅｎ ｐｒｏｐｏｓｅｄ ,ｆｏｒｅｘａｍｐｌｅ,ｏｐｔｉｃａｌｆｉｂｅｒｄｅｌａｙ ｌｉｎｅｓ[2 ] .Ｉｎｔｈｉｓｐａｐｅｒ,ｗｅｅｍｐｌｏｙｔｈｅｌｏｗ ｗｅｉｇｈｔＯｐｔｉｃａｌＯｒｔｈｏｇｏｎａｌＣｏｄｅ(ＯＯＣ ｓ) [3～5] ｗｉｔｈｔｈｅｌｅｎｇｔｈＭａｎｄｔｈｅｗｅｉｇｈｔΩａｓｏ…     

Measurement of a Three-dimensional Gas Temperature Fidld with Holographic Interferometry

It is well known that optical tomography can accurately and quantitatively re-construct the refractive index field of a transparent medium and display the three dimensional image of other thysical quantities relevant to temperature or density.In this paper.a new multidirectional holographic interferometric system is built,and two kinds of image tecon-struction algoritma are introduced and an automatic image processing system of interfero-gram is designed.A three dimentsional asymmetric gad flow field above a combustor is experi-mentally investigated with holographic interferormetry.The reconstructed temperatures are similar to those measured with a thermocouple.     

非相干同轴数字全息显微成像研究

采用非相干光作 为光源,空间 光调制器(SLM)和CCD组成非相干干涉仪作为全息记录模块,结合物镜搭建了非相干同轴数 字全息显微成像 系统。采用该系统对分辨率板成像,实现了512lp/mm的空间分辨率 ,并对系统放大率进行了标定。用草本 植物茎横切细胞作为测试样品,完成了生物细胞显微观察实验,将数字全息显微术的应用范 围从相干光扩展到了非相干光领域,推进非相干数字全息显微术的应用研究。     

全息立体显示视角增强方法研究

介绍了全息立体成像的工作原理,通过与其他立体成像技术比较,说明全息立体显示能形成真三维再现像,具有可以提供全部物理景深的优势。从改善全息立体像观察视角出发,阐述了4种增强视角的方法,介绍了这些方法的原理,并对这些方法做了比较分析。     

大幅面多路合成全息图复制系统的研究

多路合成彩虹全息图可以在白光点光源照射下显现出360°伴有动作的立体影像,在许多领域具有广阔的应用前景。为适应市场的需求,研制了多路合成彩虹全息图复制设备和适用于复制多路合成彩虹全息图的超微粒卤化银全息胶片。对多路合成全息图和一般彩虹全息图再现时表面光强分布进行了研究和分析;介绍了多路合成彩虹全息图复制设备和适用于复制多路合成彩虹全息图的超微粒卤化银全息胶片的特性。使用研制的系统和全息胶片复制出的360°的圆筒状多路合成彩虹全息图不仅噪声低,而且衍射效率高。该系统使批量制作多路合成彩虹全息图的工效提高了几十倍。     

Stereo imaging quality evaluation in a full-color three-dimensional display system

To evaluate the light field display system with a liquid crystal display (LCD) and a holographic functional screen (HFS), the voxel theory based on the ray tracing is used. By analyzing the voxels defined by the cases of corresponding pixels overlapping completely and partially in the image space, the resolution characteristics of the system are discussed. The theoretical model is verified in the reconstruction experiment of a resolution target and compared with the calculation result of the presented system. Finally, we give an optimization method for the display image quality.     

Distortion Compensation of Reconstructed Hologram Image in Digital Holographic Display Based on Viewing Window

A holographic display based on a viewing window enables the converging of a reconstruction wave into a viewing window by means of an optical system. Accordingly, a user can observe a reconstructed hologram image, even with a small diffraction angle. It is very difficult to manufacture an optical system with no aberrations; thus, it is inevitable that a certain amount of wave aberrations will exist. A viewing‐window‐based holographic display, therefore, always includes distortions in an image reconstructed from a hologram pattern. Compensating the distortions of a reconstructed image is a very important technical issue because it can dramatically improve the performance when reconstructing a digital three‐dimensional content image from a hologram pattern. We therefore propose a method for suppressing image distortion by measuring and compensating the wave aberration calculated from a Zernike polynomial, which can represent arbitrary wave aberrations. Through our experimental configuration using only numerical calculations, our proposed method decreased the reconstructed image distortion by more than 28%.     

计算彩色彩虹全息术颜色复现机理分析

基于颜色传递和匹配原理,讨论了彩色计算全息色系和计算机显示色系下颜色量的一般转换关系,同时研究了计算全息物光波振幅和其对应的颜色量之间的等色传递问题,建立了计算全息物光波振幅与计算机显示色系下颜色量之间所应满足的关系。在此基础上对计算彩色彩虹全息术颜色复现机理进行了详细的讨论,给出了计算彩色彩虹全息术颜色复现时的三原色。     

Microwave holographic interferometry

Microwave holography is an extension of the optical holography to the microwave field. In fact, by using a well-known characteristic of the holographic process, it is possible to record the hologram at frequencies very far from the optical region (microwave) and to reconstruct a visible image by laser light. This paper describes the experimental apparatus and the technique used for obtaining a satisfactory optical wave reconstruction from microwave holograms. The resolving power of the system which was experimentally tested, and visible images of microwave transparencies and of a back scattering object are given. As an alternative application of the microwave holography together with the optical wave reconstruction, in this paper, extension of holographic interferometry to the microwave region is suggested, and the visible image of a deformed object crossed by fringes due to microwave interference is also shown. This technique can find applications, for instance, in the mapping of the earth's deformations or in that of the tides. Different aspects of the microwave holographic interferometry have been also discussed.     

制作和重现像面彩色全息图的新方法

本文提出像面彩色全息图的制作白光重现的新方法。根据Kogelnik关于体积全息图的耦合波理论,记录时,根据角度灵敏度的要求,把三基色参考光束分别按照不同角度入射到全息干板上。用这种方法记录的彩色全息图,当用与三基色参考光束的空间频率相同的三基色普通光束照射时,将重现消除了串色干扰的原物体的三维彩色像。利用三个全息光栅从白光中选择出三个再现基色波段,并对像面彩色全息图色散补偿,这种白光重现方法没有色模糊。     

Digital Holographic Display System with Large Screen Based on Viewing Window Movement for 3D Video Service

A holographic display system with a 22‐inch LCD panel is developed to provide a wide viewing angle and large holographic 3D image. It is realized by steering a narrow viewing window resulting from a very large pixel pitch compared to the wave length of the laser light. Point light sources and a lens array make it possible to arbitrarily control the position of the viewing window for a moving observer. The holographic display provides both eyes of the observer with a holographic 3D image using two vertically placed LCD panels and a beam splitter to support the holographic stereogram.