脉冲

This paper introduces a system based on MCU 51 ultrasonic pulse reflection altimetry systems, therefore we choose to 80C51 or 89C51 altimeter on the objects.

摘 要：本文介绍了一种基于51系统单片机的脉冲反射式超声波测高系统，所以我们选用80C51或89C51进行对物体的测高。

Using mordern physical chemistry techniques (such as XRD、 TG-DTA、 IR、 XPS and 〓Xe-NMR)、 chemical adsorption techniques (NH〓-TPD、 H〓-TPD、 TPO、 TPR etc.) and pulse flow microreaction of n-hexane、 methylcyclopentene and n-hexane containing 0.2ppm thiophene, we studied mainly the following three points:(1). the changes occured during the calcination pretreatment of Pt ammine complex supported on β and L zeolites;(2). the effect of structure and acidity-basicity of zeolite on the dispersion and electron state of Pt particles; and (3). the influence of second metal component on the reactivity of nhexane aromatization and sulphur-resistance of Pt/L zeolite catalyst. Several interesting and valuable results are obtained and summerized as follows

本论文运用各种近代物理表征方法(XRD、BET、TG-DTA、IR、XPS和〓Xe-NMR)、化学吸附技术(NH〓-TPD、H〓-TPD、TPO、TPR等)和正己烷、甲基环戊烷及含噻吩正己烷的脉冲微反等方法，着重研究了(1)载Pt的β和L沸石在分解预处理过程中发生的变化；(2)沸石载体结构及酸碱性对Pt粒子分散及电子状态的影响；(3)第二金属组份对载Pt沸石催化剂上正己烷芳构化及抗硫性能的影响等，得到了某些有意义的结果。

With the invention of the chirped pulse amplification technology more than 10 years ago, a new generation of lasers appear.

随着发明的啁啾脉冲放大技术技术10多年前，新一代激光的出现。

It is a combination of the pulse amplitude modulation and frequency modulation types.

该仪器系统是由脉冲幅度调制和频率调制两种遥测系统复合组成的。

Pulse, Amplitude and Frequency modulation are all available.

脉冲，幅度和频率调制都可用。

The obvious source is pulse or amplitude modulation.

显著的因素是脉冲或幅度调制。

The effects of frequency and magnetic strength on the cell viability and growth of blue-green algae Anabaena flos-aquae by pulsed electric magnetic field were studied.

对脉冲变频电磁场作用下，扫描频率和磁感应强度的变化对水华鱼腥藻细胞活性和生长的影响进行了研究。

The data are discrete electrical pulses. The wave is an analog representing the data.

数据是离散的电脉冲，波是表示数据的一个模拟量。

At present, domestic monopulse radar A/R monitor widely adopts analog monitor with the advantage of direct display.

目前国内脉冲雷达A/R显示器大多采用模拟显示器形式，虽然有显示直观等优点，但故障率高，维修不便。

The operational principle of electro-optic ADC(analog-to-digital converter) is presented in the paper.

简要介绍了电光ADC的原理，分析、比较了光相位编码的全光ADC及利用光时分复用技术、光波分复用技术、脉冲时域展宽技术的电光ADC的结构及性能。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。