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Untitled
光孤子传输特性模拟 在光纤通信中，光脉冲信号在光纤中传输的过程中会受到色散、损耗和非线性等作用的影响而不断地发生演化和畸变。脉冲演化的规律遵循非线性薛定谔方程（NLSE）。由于NSLE 在一般情况下无法求得它的解析解，因此通常需采要用数值方法来求解，最终归结于求解归一化的NLSE。本文使用了分步傅里叶方法对归一化NLSE 进行了求解，并模拟了输入为一到三阶双曲正割光脉冲条件下光脉冲传输演变情况。(soliton In optical fiber communications, the optical pulse signals in fiber-optic transmission process will be subject to dispersion, loss and non-linear effects, such as constant evolution and distortion occurs. Pulse to follow the evolution of the law of nonlinear Schrö dinger equation (NLSE). Because NSLE under normal circumstances can not achieve its analytical solution, it normally takes mining use numerical methods to solve, and ultimately attributed to solving normalized NLSE. This article uses the step-by-step Fourier method and normalized NLSE was solved, and analog input for the first-order,second-order and third-order hyperbolic secant optical pulses under the conditions of the evolution of optical pulse transmission.)
- 2009-11-17 17:40:32下载
- 积分：1
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fisher
人工鱼群算法，在一片水域中,鱼往往能自行或尾随其他鱼找到营养物质多的地方,因而鱼生存数目最多的地方一般就是本水域中营养物质最多的地方，人工鱼群算法就是根据这一特点,通过构造人工鱼来模仿鱼群的觅食!聚群及追尾行为,从而实现寻优，以下是鱼的几种典型行为:(1)觅食行为:一般情况下鱼在水中随机地自由游动,当发现食物时,则会向食物逐渐增多的方向快速游去。(2)聚群行为:鱼在游动过程中为了保证自身的生存和躲避危害会自然地聚集成群，鱼聚群时所遵守的规则有三条:分隔规则:尽量避免与临近伙伴过于拥挤 对准规则:尽量与临近伙伴的平均方向一致 内聚规则:尽量朝临近伙伴的中心移动。(3)追尾行为:当鱼群中的一条或几条鱼发现食物时,其临近的伙伴会尾随其快速到达食物点。特点：1)具有较快的收敛速度,可以用于解决有实时性要求的问题 2)对于一些精度要求不高的场合,可以用它快速的得到一个可行解 3)不需要问题的严格机理模型,甚至不需要问题的精确描述,这使得它的应用范围得以延伸.停止条件1) 判断连续多次所得的均方差小于语允许的误差2）判断某个区域的人工鱼群的数目达到某个比率3）联系多次所获取的值均不能超过已寻找的极值。 (Artificial fish swarm algorithm, in the midst of the waters, the fish tend to own or trailing other fish to find places with more nutrients and thus the largest number of fish survival in general is a place where most of the nutrients in the waters, artificial fish swarm algorithm is based on thisa characteristics, by constructing artificial fish to mimic fish foraging clusters and rear-end behavior, in order to achieve optimization, several typical behavior of the fish: (1) foraging behavior: the general case of fish in the water at randomthe free-swimming, swimming quickly when food is found, then the food is gradually increasing in the direction. (2) cluster behavior: the fish swimming in the process of naturally clustered, and abide by the rules when the fish cluster there are three: separate rule: try to avoid overcrowding with neighboring partners in order to ensure their own survival and to avoid harm alignment rules: as far as possible consistent with the mean direction of the)
- 2012-04-22 17:13:36下载
- 积分：1
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yashengsuchashengsuliudong
利用MacCormark算法，解二维拉瓦尔喷管亚声速到超声速流问题(To use MacCormark algorithm, solution Villa Val nozzle subsonic to supersonic flow problem)
- 2013-04-17 16:46:12下载
- 积分：1
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复件 testbackstepping
说明： 可以熟悉matlb实现backstepping经典控制算法的例程(Can be familiar with MATLAB to achieve the classic backstepping control algorithm routines)
- 2021-02-06 15:04:38下载
- 积分：1
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yuanma2
阵列信号处理中:四个输入信号,八单元均匀圆阵的波达方向估计和波束形成.应用Music方法(Array Signal Processing: four input signals, eight units of uniform circular array DOA estimation and beamforming. Applied Music Methods)
- 2007-12-01 17:29:49下载
- 积分：1
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diagnosis-methods-books
对机械故障诊断的现代信号处理方法作了详细说明，希望大家可以使用多种方法。(For mechanical fault diagnosis of modern signal processing methods are explained in detail, I hope you can use a variety of methods.)
- 2013-08-27 16:15:12下载
- 积分：1
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yichuansuanfa
使用遗传算法优化风、光、燃气互补发电最佳配置(Genetic algorithm is used to optimize the optimal configuration of wind, light and gas complementary power generation)
- 2018-09-27 10:02:01下载
- 积分：1
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reversiblehidingICIP02
Paper on reversible data hiding
- 2010-04-22 06:01:16下载
- 积分：1
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matlabzhuchengfen
MATLAB主成分分析法,对于数学建模的同学很有帮助(PCA MATLAB)
- 2011-08-05 15:11:25下载
- 积分：1
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ELSA_v0.1.tgz
This package contains the code for the Enhanced Local Subspace Affinity (ELSA)
with Enhanced Model Selection (EMS+) and number of motions estimation
based on the eigenvalue spectrum of the Symmetric Normalized Laplacian matrix.
- 2013-12-07 05:31:52下载
- 积分：1
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