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一.正则表达式 匹配一个文件中的某个单词,并打印出来 阅读全文
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1 如何运行 gnuplot是一个命令行输入的工具,把命令行写入一个文本file1 file2。使用下列方式运行。 gnuplot {option} file1 file2 2 产生一个图标,不管数据怎么变化保持不变 gnuplot -persist -e "set title 'Sine curv 阅读全文
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Learn Perl in about 2 hours 30 minutes By Sam Hughes Perl is a dynamic, dynamically-typed, high-level, scripting (interpreted) language most comparabl 阅读全文
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源文地址 (September 2008) For the last couple of years, I've been working on European Space Agency (ESA) projects - writing rather complex code generators 阅读全文
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1 //author : Leon yangli0534@gmail.com 2 3 #include <stdlib.h> 4 #include <stdio.h> 5 #include <math.h> 6 #define NUM_POINTS 500 7 #define NUM_COMMAND 阅读全文
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1 %1D FDTD simulation with a simple absorbing boundary condition 2 % and a TFSF boundary between hy[49] and ez[50]. 3 % dielectric material located ez[100] 4 SIZE = 400; 5 LOSS = 0.01; 6 LOSS... 阅读全文
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1 %1D FDTD simulation with a simple absorbing boundary condition 2 % and a TFSF boundary between hy[49] and ez[50]. 3 % dielectric material located ez[100] 4 SIZE = 300; 5 LOSS = 0.01; 6 ez ... 阅读全文
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介质位于x>150的区域。 1.自由空间介电常数为1,介质区域的介电常数9,计算得到反射系数为-1/2,透射系数为1/2,单位强度的场传播到射面时,透过的场幅度为1/2,反射场的幅度为-1/2。 2.波在介质中的传播速度为自由空间中的1/3。 3.左边的吸收边界起到了作用,右边的吸收边界却发生了反射 阅读全文