宽频带

The results of numerical modeling indicate that the thin film microstrip lines with finite ground width have good broad band characteristics and the characteristic impedance, attenuation constant and effective dielectric constant have small change with the finite ground width changing.

作者用该程序对有限接地面薄膜微带线进行了时域仿真，结果显示在保证传输模不受干扰的情况下，在较宽频带范围内有限接地面对微带特性有微弱影响。

Wideband amplifier, realized by the technology of automatic gain control, is used widely in radar system and other correlative electronic fields.

采用自动增益控制技术实现的宽频带放大器在雷达系统及其他相关电子领域有著广泛的应用。

Simulations based on finite integration method are carried out in a wide frequency range for a balanced feeding finite wide-angle biconical antenna and many results including input impedance and far fields are obtained.

利用基于有限积分法的电磁场仿真技术对平衡馈电的有限长宽角双锥天线作了计算，得到了天线在很宽频带内输入阻抗、远区辐射场与频率的关系曲线。

The ultra -- high -- frequency and ultra -- wideband partial discharge detecting methods is newly put forward. It is important for development of partial discharge de...

本文简明扼要地阐述了局部放电信号的物理本质和超宽频带检测原理，运用自行研制的超宽频带局部放电检测系统，研究了典型放电信号和干扰信号的本征特征，为进一步建立超宽频带局部放电检测指纹库、提高绝缘诊断的准确性奠定了基础。

ABSTRACT In this dissertation, in accordance with two projects from the National Defense Science Industry Committee:"The Laser Doppler Velometer for the Large-value and Wide-frequency-range Standard Negative-step-force"And"The novel kind Laser Vibrometer for vibration transducers calibration"have been studied deeply and systematically.

结合国防科工委85攻关项目："用于大力值宽频带标准力源发生装置中的激光多普勒测速系统"和国防攻关项目："用于加速度传感器复合灵敏度绝对校准的宽频带相位型激光测振仪"的研制。

Of, relating to, or having a wide band of electromagnetic frequencies

宽波段的，宽频带的：属于、关于或有电磁频率宽频带的

Along with continuous development of broadband seismologic observation techniques, the density of global and regional digital seismologic observation networks is constantly increasing, and the quantity of broadband seismograph using for mobile seismologic observation will rapidly increase.

随着宽频带地震观测技术的不断发展，全球及区域数字地震观测台网的密度正在不断加大，用于流动地震观测的宽频带地震仪的数量将继续迅速增加。

This paper describes laminar small faults affected a number of factors to take specific measures :Pre-stack time migration through the use of technology to improve inter-layer tomography for the accurate identification and de脚本ion interlayer fault lay the foundation;Through meticulous depicts dip scanning technology to small fault;Phase-edge technology frequency bands using a broadband seismic data to better identify the fault system.

本文针对影响描述层间小断层的因素采取了多项有针对性的措施：通过采用叠前时间偏移技术改善层间断层成像，为准确识别与描述层间断层奠定基础；通过地层倾角扫描技术来细致刻画小断层；利用优势频带分频相位技术较好地实现了宽频带地震资料的断裂系统识别。

As a scale to measure precision and reliability, error analysis plays a very significant role in near field measurement in time domain.

随着现代通信技术和雷达技术向宽频带方向的迅速发展，短脉冲天线和超宽带天线获得了广泛应用，对与之相对应的天线测试技术也提出了更高的要求，传统的频域天线测试系统测试的频带有限，对超宽带天线测量效率较低，这就需要将频域近场测量扩展到时域近场测量。

Broad band seismic recorder is a three-component, large dynamic range and intellectualized seismic recorder with broad band and high degree of accuracy.

宽频地震仪是宽频带、高精度的三分量、大动态、智能化的地震记录仪。

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。