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select
根据中国气象数据网下载的全国气象站点的数据,批量提取所需站点的数据。(According to the data of the national meteorological station, which is downloaded by the China Meteorological data network, the data of the required sites are extracted.)
- 2018-01-14 11:00:28下载
- 积分:1
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basic PSO for function
说明: 应用基本粒子群算法求解复杂连续函数优化问题(Application of Basic Particle Swarm Optimization to Complex Continuous Function Optimization)
- 2019-06-01 11:15:13下载
- 积分:1
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IJarea-postproc
abaqus interface xfem
- 2013-06-21 23:01:33下载
- 积分:1
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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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Pointandsegment
判断点和线段之间的关系,包括点在线段的上,点在线段的延长线,反向延长线,点在线段外四种情况(Judge the relationship between the point and line, including the point on the line, in line at the extension of reverse extension cord, and so on.)
- 2013-01-08 14:54:18下载
- 积分:1
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PLS_NIPALS
非线性迭代偏最小二乘的MATLAB代码,可用于光谱数据的建模(MATLAB code of NIPLS)
- 2012-08-23 10:04:38下载
- 积分:1
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Boltzmann
使用格子boltzmann方法模拟气液两相流运动(Lattice Boltzmann method(LBT) to simulate two phase flow)
- 2021-01-22 16:28:39下载
- 积分:1
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bline-interp
编写了一个用于二维水深插值的双线性插值的fortran程序,用于水深的插值计算,内有验证的算例(Write a fortran program for two-dimensional depth interpolation bilinear interpolation, interpolation calculation for water depth, within a verification example)
- 2021-03-18 10:09:19下载
- 积分:1
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RAS-algorithm
用于解决投入产出问题的RAS算法,已知矩阵的行和和列和,可以求出矩阵的具体值。(For the RAS algorithm to solve the problem of input and output. We know the rows and columns of the matrix,then the specific value of the matrix can be calculated.)
- 2021-03-24 09:59:15下载
- 积分:1
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DXSNH
基于最小二乘的多项式拟合法的GPS周跳探测程序(Based on the least square polynomial fitting method of GPS cycle slip detection program
)
- 2021-02-14 10:49:49下载
- 积分:1