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Terahertz quasi-perfect vortex beam with integer-order and fractional-order generated by spiral spherical harmonic axicon 下载免费PDF全文
We propose a new method to generate terahertz perfect vortex beam with integer-order and fractional-order. A new optical diffractive element composed of the phase combination of a spherical harmonic axicon and a spiral phase plate is designed and called spiral spherical harmonic axicon. A terahertz Gaussian beam passes through the spiral spherical harmonic axicon to generate a terahertz vortex beam. When only the topological charge number carried by spiral spherical harmonic axicon increases, th... 相似文献
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B-vexFuzzyMappingsandItsApplicationtoFuzzyOptimizationProblems¥LiuDefeng(InstituteofQuantitativeEconomics,DongbeiUniversityOf... 相似文献
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多目标随机线性规划问题的模糊求解方法 总被引:1,自引:0,他引:1
刘德峰 《应用数学与计算数学学报》1998,12(1):64-70
研究了资源量b_i为随机变量的多目标随机线性规划问题,建立了相应等价的确定性多目标规划模型,提出了有效的模糊求解方法,并用实例作了有效性说明。 相似文献
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