宽频带

DG1000 operates direct figure to synthesize science and technology, the random that can output an user to be defined oneself is undee, have rich input output, and frequency meter of high accuracy, broad frequency band, frequency limits 100MHz arrives 200MHz, frequency resolution achieves 6 / second.

DG1000操作间接数字分解科技，可输出用户自界说的任意波形，领有丰硕的输入输出，以及高精度、宽频带频率计，频率规模100MHz到200MHz，频率分辨率达到6位/秒。

Using natural frequency ratio and damping ratio as design variables, constructing an objective function with the peak values of dynamic magnification factor and the dynamic magnification area of the main system in the whole frequency band, the optimization problem is built.

建立了以固有频率比和阻尼比为设计变量，以振幅动力放大系数函数的多个峰值和整个宽频带下面积构造目标函数的优化问题。给出了两个自由度减振器参数的优化计算实例。

A novel application of genetic algorithm in designing broad omnidirectional reflectors was introduced.

介绍了遗传算法在设计宽频带全能反射器中的应用。

Along with the development of the modern and high technique war, put forward the new needs to the big power microwave vacuum tube, and provided the good environment for its development.

随着现代高技术战争的发展，对大功率微波电子管提出了新的需求，并为其发展提供了良好的环境，促使真空电子器件向更大功率、更宽频带、高效率和高可靠性方向快速发展。

Primary analysis and discussion on some typical earthquake precursor anomalies which appear in the range of 500 km are done according to the data recorded by the RZb-1 type digital strain gauge with high precision and broad channel.

就库尔勒台用高精度RZB-1型宽频带数字应变仪先后在500 km范围内记录到的几次较典型的MS5.5左右地震的前兆异常作了初步分析与探讨。

With the recent appearance of broadband OBS, the background noise in the extended frequency range is even more significant.

现在广泛使用的宽频带洋底地震计在扩展频段内记录到的背景噪声更强。

Two works guaranteed the fulfilment of this studies,(1)developing compressional - and shear - waves transducers with broadband which is key part of the system in the physics model experiment, and study of the special property and using skills of the transducers , groping the relative experience to develop transverse wave measurment and observation at laboratory.(2) establishing a suit of comprehensive testing system to observe the elastic wavefield in anisotropy media .

首先通过研制物理模型实验技术中的关键器件纵横波宽频带换能器，及对其性能和使用技巧的研究，积累实验室开展各向异性介质的测试经验，建立了一套较完整观测各向异性介质弹性波场的测试系统。

As the field of microwave communications professional manufacturer of passive components, Bo Xiang Electronics since its inception is committed to research and development, production and marketing of power splitter, coupler, Combiner, diplexers, filters, power load, such as small and medium-sized 6 Series more than 100 kinds of products, widely used in GSM, CDMA, PHS and other communications networks a variety of distribution systems to low-loss, wideband, high reliability, waterproof dust characterized, its production, processing capability, stable performance , delivered quickly and cost-effective, at present is the biggest kind of passive components, one of professional supplier in 2005, output value of more than 6000 million.

作为微波通信领域的无源器件专业制造商，博翔电子自成立以来致力于研发、生产和销售功分器、耦合器、合路器、双工器、滤波器、中小功率负载等6个系列100多种产品，广泛应用于GSM、CDMA、小灵通等通讯网络的各种分布系统中，以低损耗、宽频带、高可靠性、防水防尘为特点，其生产、加工能力强、性能稳定、交付迅速、性价比高，目前是国内该类无源器件最大的专业供应商之一，2005年产值6000多万元。

Realisations of the philosophy are shown for high-precision static measuring units and for universal broadband amplifier systems .

采用高精度检测单元和通用宽频带放大器系统可以高分辨率，高稳定性，有效地抑制和衰减干扰信号与不期望的动态信号，实现高精度检测。

The prototype of some new seismic sensors have been finished, however some are still in the conceptual design. They will be main development direction of broadband seismometers in the future.

这些传感器有些已经有原理样机，有些还处于概念设计中，它们将是未来宽频带地震仪技术发展的主要方向。

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。