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metal_artifact_reduction
Die Computertomographie (CT) hat seit ihrer Einfuhrung im Jahr 1972 [22] die medizinische
Bildgebung revolutioniert. Die raumliche Abbildung gesamter Patientenvolumina mit
hoher Genauigkeit und quantitativ verwertbaren Bildern ist ein immenser Vorteil gegenuber
herkommlichen bildgebenden Verfahren in der Medizin wie z.B. der konventionellen Rontgendiagnostik.
Die Entwicklung von kontinuierlich rotierenden CT Systemen und der darauf
folgenden Einfuhrung der Spiral CT im Jahr 1989 [38, 40] mit der Moglichkeit, komplette
Volumina wahrend einer Atempause zu scannen, steigerte die Bedeutung der Computertomographie
noch mehr.
- 2007-11-15 02:01:42下载
- 积分:1
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mat.a-TSP-
已知n个城市之间的相互距离,现有一个推销员必须遍访这n个城市,并且每个城市只能访问一次,最后又必须返回出发城市。如何安排他对这些城市的访问次序,可使其旅行路线的总长度最短?
(Known n city between the distance, the existing of a salesman to be visited this n city, and each city can only be visited once, finally to return to the starting city. How to arrange for him to visit the city order, which can make the total length of the shortest travel route)
- 2012-05-05 14:36:03下载
- 积分:1
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check_valve_motion
排氣閥門的UDF,裏頭有寫著在如何的壓力底下排氣閥門會開啟,當壓力未達到時排氣閥門將會關閉(Exhaust valve UDF, inside there that says how the pressure beneath the exhaust valve opens when the pressure does not reach the exhaust valve will be closed)
- 2014-11-26 15:25:42下载
- 积分:1
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ARMcad2mat
本内容为,三维模型直接导入matlab中,可以方便的运行,可以更观的体现模型的真实性(This content is, three-dimensional model directly into matlab, you can easily run, you can view more manifestation of the authenticity of the model)
- 2013-09-30 11:13:40下载
- 积分:1
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linemotortwo
采用传递函数的转速、电流双闭环直渡调速系统的仿真模型(Using the transfer function of the speed of the current double closed loop the straight crossing speed control system simulation model)
- 2013-04-09 21:26:02下载
- 积分:1
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fangzhen
实验一 双极性矩形随机信号的归一化功率谱密度一
1.1 功率谱密度简介
平稳过程的任何一个非零样本函数的持续时间为无限长,显然都不满足绝对可积和总能量有限的条件。因此,它的傅里叶变换不存在即没有频谱函数。所以我们用功率谱密度来表述其频谱特性。
随机过程的任一实现是一个确定的功率型信号。而对于任意的确定功率信号f(t),它的功率谱密度为:
式中, 是f(t)的截短函数 对应的频谱函数。f(t)是平稳随机过程 的一个实现。而随机过程某一个实现的功率谱密度不能作为过程的功率谱密度。过程的功率谱密度应该看作是任一实现的功率谱密度的统计平均,即
虽然该式给出了平稳随机过程的功率谱密度,但我们通常都不利用这个式子来计算功率谱。我们知道,确知的非周期功率信号的自相关函数与功率谱密度是一对傅里叶变换。对于平稳随机过程,也有类似的关系,即
和
对于平稳随机过程我们通常先求出其自相关函数再利用上式求出其功率谱密度。
1.2 实验要求
1.了解平稳随机信号功率谱的概念及计算方法
2.仿真不同占空比,等概、非等概双极性矩形随机信号的归一化功率谱密度
3.分析不同信号所包含的频谱分量,有无直流分量和定时分量信息
(A pair of rectangular random experiment polarity signal sample return a nonzero function of any duration power spectral density of a 1.1 power spectral density of a stationary process Introduction of infinite length, apparently not satisfied absolutely integrable and the total energy of the limited conditions. Therefore, it is the Fourier transform of the spectrum that does not function does not exist. Therefore, we use the power spectral density to express their spectral characteristics. Any random process is a realization of a certain type signal power. For arbitrarily determined power signal f (t), its power spectral density is: wherein, is f (t) is a function corresponding to the truncated spectrum function. f (t) is a stationary random process of realization. The random process to achieve a certain power spectral density can not serve as the power spectral density of the process. Power spectral density process should be seen as a statistical average power spectral density of any r)
- 2014-11-30 20:39:29下载
- 积分:1
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yichuansuanfa
遗传算法的算法实例,我是一个初学者,通过研究这些现成的代码,感觉对自己挺有帮助(It is helpful for those who study MATLAB first time)
- 2015-03-29 10:44:45下载
- 积分:1
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zhuchengxu
此文件很棒的,通过修改动力仿真软件advisor模型数据来来实现对传动系统参数的优化,可以配合相应的算法程序,如退火法,粒子群,遗传等(matlab assist parameter optimization)
- 2014-11-01 11:21:09下载
- 积分:1
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niudun
解决非线性方程组,通过输入初始值来迭代得到数值解(nolinear function)
- 2011-05-05 11:24:37下载
- 积分:1
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live-load-and-deterioration-effects
通过小波理论与回归分析提取桥梁的活载与劣化效应(Live load and deterioration effects of the bridge)
- 2012-04-07 00:37:28下载
- 积分:1