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high-resolution-one-dimension
高分辨率要求系统具有大的带宽，瞬时带宽的增加必将提高系统对硬件的要求，本文采用方便灵活的步进频率波形信号。脉间频率步进波形通过子脉冲载频的步进变化来获得大的有效带宽，使成像具有高分辨率，采用加窗和补零方法提高信噪比，但该信号对目标径向速度非常敏感。采用补零方法提高距离取样分辨率，使距离像细化，并用公式说明了补零只能提高距离取样分辨率，并不能改变频率步进信号的距离分辨能力。该信号波形对目标径向速度的敏感，使目标能量分散到邻近的距离单元造成距离分辨率下降，如果不事先进行速度补偿，直接对回波信号进行逆傅立叶变换，将使所成一维距离像发生频谱展宽，并伴有距离像发生平移。本文证明了当目标有径向速度时仍采用对回波信号直接进行逆傅立叶变换的方法将使一维距离像发生频谱展宽并伴有距离像发生频移，从而严重影响了一维距离像的质量。(high-resolution requirements of the system with large bandwidth, the increased instantaneous bandwidth will improve the system of hardware, In this paper, a flexible and convenient step frequency signals. Pulse frequency step-pulse waveform through the carrier frequency step to achieve great changes in the effective bandwidth. make imaging with high resolution, increasing the window and fill methods to improve signal-to-noise ratio is, However, the signal on the target radial velocity is very sensitive. Using zero-distance sampling method to improve resolution, so that distance as refinement, and formulates a zero-distance sampling can improve resolution, does not alter the frequency of the signal from stepping resolution capabilities. The signal waveform on the target radial velocity sens)
- 2007-04-07 22:15:33下载
- 积分：1
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KMP-string-match
编写一个使用KMP算法的字符串匹配程序。
使用方法：字符串匹配.exe -f xxx.txt -s xxx
-f 指定要查找的文件
-s 指定要查找的字符串(Writing a string matching algorithm using KMP program. How to use: string matching exe-f xxx.txt-s xxx-f to specify the file you want to find-s to specify the search string)
- 2013-12-08 01:12:46下载
- 积分：1
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ems
用于处理电力系统中含有4个节点的随机潮流计算(Four nodes to deal with the random flow calculation)
- 2009-06-16 09:43:28下载
- 积分：1
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refangcheng
一维热传导方程的求解，包括显式和隐式，及其对比(One-dimensional heat conduction equations, including explicit and implicit, and the contrast)
- 2021-04-24 17:18:47下载
- 积分：1
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data-fit
基于最小二乘法的离散数据的曲面拟合，有二次拟合和三次拟合，并能自动出图(Based on the least squares method of discrete data of the surface fitting, there are quadratic fitting and three fitting, and can automatically plot)
- 2021-04-23 09:18:48下载
- 积分：1
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averageData
读取csv文件的数据，按要求拉算出平均数(Read csv file data, calculate the average number required to pull)
- 2020-08-14 14:58:35下载
- 积分：1
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2DPE_VCPP6.0
抛物方程是由赫姆霍兹方程推导而来，在计算大区域电磁传播有较大的优势，本程序是二维的情况。(Parabolic equation is derived the Herm Holtz equation, in the calculation of large areas of electromagnetic propagation has a greater advantage, the program is a two-dimensional situation.)
- 2016-11-20 12:32:02下载
- 积分：1
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mstm-2.2
mpi 版本mstm 程序用于计算非球形粒子散射问题(MSTM, MPI version)
- 2021-01-07 10:58:53下载
- 积分：1
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fembem-for-EM-scattering
有限元法边界元法求解二维散射问题，非常有用(Finite element method for solving two-dimensional boundary element method scattering problem, very useful)
- 2021-04-23 19:48:47下载
- 积分：1
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fenerzhizhisuanfa
说明： 这是一个ACM试题中的算法，叫分而治之算法，上面有PPT还有实例代码，希望喜欢ACM的同学可以喜欢(This is a Question in the ACM algorithm, called divide and conquer algorithms, there are examples of the code above, there are PPT hope that students like to be like the ACM)
- 2010-03-26 12:38:25下载
- 积分：1
