1) step-transform
阶梯变换算法
1.
An improved step-transform algrithm is proposed for high squint mode synthetic aperture radar(SAR).
针对大斜视角下合成孔径雷达信号时域距离校正后的特点,提出了改进的阶梯变换算法,在各个子孔径分别采用不同调频斜率的参考信号进行去斜处理,解决了信号多普勒调频斜率随方位时间变化的问题;通过频域插值准确挑选粗分辨傅里叶输出数据,克服了原有阶梯变换算法对参数匹配的严格限制。
2) stepped reduction method
阶梯折算法
1.
Based on the stepped reduction method,the governing equation can be explicitly expressed by the design variables well as geometric constraints.
利用阶梯折算法的思想,给出了目标函数、几何约束条件关于设计变量的显式表达式,并给出算例。
2.
By using the stepped reduction method,the equilibrium equations of the cylindrical shell under arbitrarily axisymmetrically distributed load are solved and its solutions of explicit formulation are obtained.
采用阶梯折算法 ,用传递矩阵导出了变厚度圆柱壳的初参数解的显式表达式 。
3.
If the middle surface of the shell is known, the equilibrium equations of the cylindrical shell under arbitrarily axisymmetrically distributed load are solved by using the stepped reduction method, and its solutions of explicit formulation are obtained.
当中面形状固定时 ,采用阶梯折算法 ,用传递矩阵导出了变厚度圆柱壳的初参数解的显式表达式。
3) stair-waveform arithmetic
阶梯波算法
1.
Some kinds of stair-waveform arithmetic are analyzed and introduced.
级联型多电平变频器中阶梯波算法的优点是开关频率低,转换效率高。
4) transformed-rule up and down
变形阶梯法
5) step impedance conversion
阶梯阻抗变换
1.
On the basis of the effects of PBG(photonic band-gap) structure and step impedance conversion structure in transmitting electromagnetic wave system,a novel waveguide coaxial connecter for 8mm has been discussed and studied based on above two structures,the 2D air column structure in dielectric support cushion depress the dissipation of electromagnetic wave in coaxial structure,at the sa.
基于PBG(Photonic Band-Gap)和阶梯阻抗变换结构在导波系统中对电磁波传播性能的影响,探讨和研究了将这2种周期性结构应用在8 mm波导同轴转换连接器的设计中的情况,通过在同轴腔内导体介质支撑垫中布置二维PBG结构抑制同轴部分横向溢散的电磁波,通过在波导腔体内增加阶梯阻抗结构,改善阻抗变换效率,提高波导同轴转换器件的传输性能。
6) stepped impedance transformer
阶梯阻抗变换器
1.
Optimization design for the stepped impedance transformer based on the genetic algorithm;
阶梯阻抗变换器的遗传算法优化设计
2.
Finally, broadband stepped impedance transformers are designed by four methods respectively.
用一个典型的数学算例验证了免疫算法的多峰值寻优性能,并用4种方法分别设计宽带阶梯阻抗变换器,结果表明基于免疫算法的微波电路优化设计具有可行性和高效性。
3.
In this paper, four methods are adopted respectively in designing broadband stepped impedance transformer.
最后用四种优化方法设计宽带阶梯阻抗变换器,结果表明基于嫁接遗传算法的微波电路优化设计具有高效性和精确性。
补充资料：Radon变换和逆Radon变换
Radon变换和逆Radon变换
X线物理学术语。CT重建图像成像的主要理论依据之一。1917年澳大利亚数学家Radon首先论证了通过物体某一平面的投影重建物体该平面两维空间分布的公式。他的公式要求获得沿该平面所有可能的直线的全部投影(无限集合)。所获得的投影集称为Radon变换。由Radon变换进行重建图像的操作则称为逆Radon变换。Radon变换和逆Radon变换对CT成像的意义在于，它从数学原理上证实了通过物体某一断层层面“沿直线衰减分布的投影”重建该层面单位体积，即体素的线性衰减系数两维空间分布的可能性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条