The Optical Implementation of High Efficiency Packed Redundant Binary Number Addition Based on Boolean Polarization－encoded Logic Algebra

Ｔｈｅ　Ｏｐｔｉｃａｌ　Ｉｍｐｌｅｍｅｎｔａｔｉｏｎ　ｏｆ　Ｈｉｇｈ　Ｅｆｆｉｃｉｅｎｃｙ　Ｐａｃｋｅｄ　Ｒｅｄｕｎｄａｎｔ　Ｂｉｎａｒｙ　Ｎｕｍｂｅｒ　Ａｄｄｉｔｉｏｎ　Ｂａｓｅｄ　ｏｎ　Ｂｏｏｌｅａｎ　Ｐｏｌａｒｉｚａｔｉｏｎ－ｅｎｃｏｄｅｄ　Ｌ...     

Analysis of Optical Equalization in WDM System

ＡｎａｌｙｓｉｓｏｆＯｐｔｉｃａｌＥｑｕａｌｉｚａｔｉｏｎｉｎＷＤＭＳｙｓｔｅｍＳＵＮＪｉａｎＧＵＷａｎｙｉＬＩＧｕｏｒｕｉＸＵＤａｘｉｏｎｇ（ＢｅｉｊｉｎｇＵｎｉｖ．ｏｆＰｏｓｔｓ＆Ｔｅｌｅｃｏｍ．，ＢｅｉｊｉｎｇＰ．Ｏ．Ｂｏｘ１２８，Ｃｈｉｎａ...     

DYNAMIC DESCRIPTION OF ION CLOUD IN RF TRAP

ＤＹＮＡＭＩＣＤＥＳＣＲＩＰＴＩＯＮＯＦＩＯＮＣＬＯＵＤＩＮＲＦＴＲＡＰＭａｎＢａｏｙｕａｎ１ＷａｎｇＸｉａｎｇｔａｉ２ＨｕＸｉｅｒｏｎｇ１ＺｈｕＪｕｎｋｏｎｇ２１ＤｅｐａｒｔｍｅｎｔｏｆＯｐｔｉｃｓｏｆＳｈａｎｄｏｎｇＵｎｉｖｅｒｓｉｔｙＪｉｎａ...     

The Dynamic Behaviour Analysis of Up－Conversion Luminescence in ErP_5O_（14） Glass

ＴｈｅＤｙｎａｍｉｃＢｅｈａｖｉｏｕｒＡｎａｌｙｓｉｓｏｆＵｐ－ＣｏｎｖｅｒｓｉｏｎＬｕｍｉｎｅｓｃｅｎｃｅｉｎＥｒＰ_５Ｏ_（１４）ＧｌａｓｓＴｈｅＤｙｎａｍｉｃＢｅｈａｖｉｏｕｒＡｎａｌｙｓｉｓｏｆＵｐ－ＣｏｎｖｅｒｓｉｏｎＬｕｍｉｎｅｓｃｅｎｃｅ...     

Crystal Growth and Nonlinear Optical Properties of 4－Br－4＇－Methoxychalcone（BMC）

Ｃｒｙｓｔａｌ Ｇｒｏｗｔｈ ａｎｄ Ｎｏｎｌｉｎｅａｒ Ｏｐｔｉｃａｌ Ｐｒｏｐｅｒｔｉｅｓ ｏｆ ４－Ｂｒ－４＇－Ｍｅｔｈｏｘｙｃｈａｌｃｏｎｅ（ＢＭＣ）￥ＣＡＯＹａｎｇ；ＺＨＵＺｈｉｄｏｎｇ；ＳＨＥＮＸｉａｏｐｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣ...     

Crostalk in WDM SCM Systems due to SRS

ＣｒｏｓｔａｌｋｉｎＷＤＭＳＣＭＳｙｓｔｅｍｓｄｕｅｔｏＳＲＳＺＨＡＯＬｉａｎｇＸＵＤａｙｏｎｇＷＵＤｅｍｉｎｇＹＵＡＮＨｏｎｇＸＵＡｎｓｈｉ（ＤｅｐａｒｔｍｅｎｔｏｆＥｌｅｃｔｒｏｎｉｃｓ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙＮａｔｉｏｎａｌＫｅｙＬ...     

Experiment on Channel-switching Add/Drop Multiplexer in a Multi-channel WDM System

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｔｈｅｏｐｔｉｃａｌａｄｄ ｄｒｏｐｍｕｌｔｉｐｌｅｘｅｒ(ＯＡＤＭ )ｉｓｅｘｐｅｃｔｅｄｔｏｐｌａｙａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｆｕｔｕｒｅｗａｖｅｌｅｎｇｔｈｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｅｄ(ＷＤＭ )ｒｉｎｇｎｅｔｗｏｒｋ .Ｕｐｔｏｎｏｗ ,ａｆｅｗｓｃｈｅｍｅｓｏｆＯＡＤＭｂａｓｅｄｏｎｗａｖｅｌｅｎｇｔｈｇｒａｔｉｎｇｒｏｕｔｅｒ,ｏｐｔｉｃａｌｓｗｉｔｃｈｅｓ,ａｒｒａｙｅｄｇｒａｔｉｎｇｗａｖｅｇｕｉｄｅａｎｄｆｉｂｅｒＢｒａｇｇ ｇｒａｔｉｎｇｓ(…     

Study of a Waveguide CO_2 Laser with Two Parallel Tubes

ＳｔｕｄｙｏｆａＷａｖｅｇｕｉｄｅＣＯ２ＬａｓｅｒｗｉｔｈＴｗｏＰａｒａｌｅｌＴｕｂｅｓＨＵＡＮＧＹｕａｎｇｑｉｎｇ（Ｄｅｐｔ．ｏｆＳｃｉ．Ｉｎｓｔｒ．ａｎｄＰｒｅｃｉｓｉｏｎＭｅｃｈ．ｏｆＸｉａｍｅｎＵｎｉｖ．，Ｘｉａｍｅｎ，３６１００５，Ｃｈｉｎ...     

The Design of the Black Patch

Ｔｈｅ　Ｄｅｓｉｇｎ　ｏｆ　ｔｈｅ　Ｂｌａｃｋ　ＰａｔｃｈＴｈｅＤｅｓｉｇｎｏｆｔｈｅＢｌａｃｋＰａｔｃｈ￥ＧＡＯＷａｎｒｏｎｇ；ＺＨＡＮＧＸｉｎｇｚｈｅｎ；ＰＡＮＬａｉｊｉｕ；ＷＡＮＧＪｉａｎｇａｎｇ（ＳｐａｃｅＯｐｔｉｃｓＤｅｐａｒｔｍｅｎｔ，Ｘ...     

The Squeezing Operator and the Squeezed States of "Superspace

ＴｈｅＳｑｕｅｅｚｉｎｇＯｐｅｒａｔｏｒａｎｄｔｈｅＳｑｕｅｅｚｅｄＳｔａｔｅｓｏｆ＂Ｓｕｐｅｒｓｐａｃｅ＂￥ＳＵＮＣｈａｎｇｙｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＨｅｉｈｅＴｅｃｈｅｒ＇ｓＣｏｌｌｅｇｅ，Ｈｅｉｈｅ１６４３００）ＭＡＡｉｑ...     

减少自变量与ALOPEX算法在二元光学元件设计中的应用

建立了在二元光学元件优化设计中独立自变量数目与入出射图案之间的数学关系，指出了以往将元件所有单元位相作为自变量直接进行优化的不当所在，为减少设计中计算量与得到好的设计结果提供了一条有效途径；另外，成功地将一种比模拟退火算法计算量小的优化算法－ＡＬＯＰＥＸ应用到二元光学元件的设计中来，结合这两方面，提出了一种计算量小，且抗局部极值能力强的通用二元光学元件设计方案，最后比较了多种算法的设计结果。     

一种基于二元位相加密的大信息量数字全息水印

研究了一种基于二元位相加密的大信息量数字全息水印方法,对需隐藏的水印信息用二元位相编码,然后再用2台阶位相密钥进行加密,作为水印插入宿主图像中,解码后得到了高质量的水印结果.与平面波照明数字全息水印相比,采用位相密钥数字全息水印有效地提高了水印提取的安全性和相对光学效率,并保持了对大信息量水印的提取质量,解码过程不依赖于原图像. 计算和分析了二元位相密钥的空间分布对水印信息提取质量的影响,计算结果验证了理论的正确性.     

基于二进制小波变换和改进SPIHT算法的图像编码方法

提出了一种基于二进制小波变换和改进SPIHT算法的图像编码方法.二进制小波变换将图像从实数域变换到实数域,消除像素之间的空间冗余性,得到了具有整数准确度的紧致描述.针对传统SPIHT算法解码图像视觉效果差的缺点,提出了改进方法.根据图像分析结果,将二进制小波变换变换系数按视觉重要性重新排序,通过对视觉重要系数优先编码,把量化误差集中在视觉不敏感区域,从而在不影响编码率失真性能的同时,有效地提高了解码图像的视觉效果.实验结果表明,和其它流行的编码算法相比,本文算法对不同性质的图像具有最优的编码性能和视觉效果.     

Improved Binary Grasshopper Optimization Algorithm for Feature Selection Problem

The migration and predation of grasshoppers inspire the grasshopper optimization algorithm (GOA). It can be applied to practical problems. The binary grasshopper optimization algorithm (BGOA) is used for binary problems. To improve the algorithm’s exploration capability and the solution’s quality, this paper modifies the step size in BGOA. The step size is expanded and three new transfer functions are proposed based on the improvement. To demonstrate the availability of the algorithm, a comparative experiment with BGOA, particle swarm optimization (PSO), and binary gray wolf optimizer (BGWO) is conducted. The improved algorithm is tested on 23 benchmark test functions. Wilcoxon rank-sum and Friedman tests are used to verify the algorithm’s validity. The results indicate that the optimized algorithm is significantly more excellent than others in most functions. In the aspect of the application, this paper selects 23 datasets of UCI for feature selection implementation. The improved algorithm yields higher accuracy and fewer features.     

Detection and Location of Multi-Period Phenomena in Chaotic Binary Sequences

Due to the influence of finite calculation accuracy and binary quantization method, the performance of chaotic binary sequences has been degraded in varying degrees, and some sequences emerge as multi-period phenomena. Aiming at the problem that it is difficult to accurately detect this phenomenon, this paper proposes a multi-period positioning algorithm (MPPA), which can accurately detect and locate the accurate period and local period phenomena contained in chaotic binary sequences. In order to test the effectiveness and correctness of the algorithm, the multi-period characteristics of logistic binary sequences with different calculation accuracy are analyzed. MPPA evaluates the randomness of binary sequences from a new perspective, which provides a new idea for the analysis of cryptographic security of chaotic sequences.     

Dynamics of a Second-Order Digital Recursive System with Binary Quantization

We analyze free oscillations and dynamical regimes of a second-order recursive system under constant or periodic binary forcing. Based on the technique developed in this paper, we find the parameter regions corresponding to certain forms and periods of motion in the system and analytical expressions for motion trajectories. The bifurcation diagrams are plotted.     

应用相息图再现二元图像的振幅配置法

针对应用相息图再现二元图像的图像质量劣化问题，提出一种基于对二元图像进行振幅补偿的改进方法，对二元图像的零振幅区进行一个微小量的振幅配置，实现该区域相位对迭代的参与，从而增加了相息图设计的自由度，改善了二元图像的质量。通过对模拟实验结果的比较分析，讨论了振幅补偿对二元图像质量的改善效果。     

Stability of Macroscopic Binary Systems

The Darwin instability effect in the binary systems(di-planets, di-stars, and di-galaxies) is analyzed within the model based on the Regge-like laws. All possible binary stars are found satisfying the Darwin instability condition that requires to search for other mechanism triggering the merger of the contact binary objects. New analytical formulas are obtained for the orbital rotation period and the relative distance between components of the binary system. The decreasing and increasing periods as functions of mass asymmetry are related, respectively, with the non-overlapping and overlapping stage of the binary object evolution.     

余弦二值编码纯相位全息图的数字微镜器件显示

分析了采用错误减算法的迭代过程,在已知物波函数傅里叶谱的振幅和物波函数振幅的情况下恢复出纯相位的物波函数,最大限度地保留物波的振幅及相位信息.提出采用余弦二值编码生成二值全息图,即全息图的透射率函数取0或1.二值全息图通过数字微镜器件全息显示系统进行了重构显示,重构效果很好.理论分析了数字微镜器件的衍射效率,表明其最大衍射效率仅和微镜之间的间隔尺寸与微镜边长之比有关.余弦二值编码方法从理论上消除了零级衍射,可以制作像素较多的全息图.