通带宽度

The different width and length of Hilbert curve geometries were investigated by finite element method. The computation results show that the DGS rejects the signal at two frequencies 2.43 GHz and 7.11 GHz from 0~9 GHz with more than -15 dB suppression. Q factors of the Hilbert curve DGS is bigger than that of conventional DGS.

通过有限元法对不同Hilbert曲线宽度和长度的DGS结构微带线进行计算，计算结果表明，该结构在0~9 GHz频段内表现出2.43 GHz和7.11 GHz这2个谐振频率，对应频率的通带反射损耗低于-15 dB，并且阻带特性在谐振频率处比传统DGS微带线有更高的 Q 值。

As the condition of Gaussian approximation for the spectral distribution of input optical signal,the expression of transmission efficiency of arrayed waveguide grating comb bandpass filter is recommended.

在输入信号光谱分布高斯近似条件下，给出了阵列波导光栅梳状带通滤波器信号通道传输效率的计算表达式和输入信号光谱宽度对阵列波导光栅梳状带通滤波器信号通道输出特性的影响。

The motive of this paper is to investigate the effect of processing parameters on the properties of silicon nitride and the coverage performance of insulator layer, and the effect of the film thickness of interface layer on the conduction current performance of thin film transistor.

本文旨在研究探索工艺参数对氮化硅薄膜的性能(如光禁带宽度、相对介电常数、折射率等)和钝化层氮化硅薄膜台阶覆盖性能的影响，以及栅界面层氮化硅薄膜厚度对薄膜晶体管导通电流性能的影响，制备性能优良的氮化硅薄膜。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。