The relationship of surface active site and turnover frequency versus activity for ammonia synthesis catalyst which were obtained from different iron oxide as precursor were investigated by means of a physisorption of N 2 and a chemisorption of CO and CO 2 and activity test.
随着母体铁氧化物性质和组成的变化 ,催化剂活性 (以氨的体积分数表征 )、质量反应速率 (rm)、合成氨转换频率 (TOF)和表面酸覆盖度 (SA)及其酸碱覆盖度的比例 (SA/SK)有相似的变化规律 ,即与Fe2 +/Fe3+呈驼峰形变化曲线 。
All-optical frequency conversion plays a key role in the future optical networks.
围绕全光频率转换技术 ,简要叙述了基于 PPLN波导二阶非线性效应实现的全光频率转换技术的原理及其在全光网中的应用 ,最后对其发展前景做了展望。
The conclusion of this paper will be meaningful for many applications of LD-pumped Nd∶YAG lasers, such as frequency conversion and so on.
该结论在频率转换等实际应用中具有重要的指导意
Two best broad band transform modes and the method of obtaining broad band transform have been proposed by analyzing the variety possible frequency conversion relationship.
8μm波长作为泵光频率,对KTP晶体在近红外光区的匹配特性作了研究,对各种可能的频率转换关系进行了分析,提出了两个最优宽带转换方式以及获得宽带频率转换的方法。
On the optical frequency upconversion theory, a weak light signal type recognition system has been founded, which m.
本文在光 学频率上转换理论上，建立了弱光光谱检测系统，使新型光谱发射器件、专用光电接收器件、 光德波器件和光电混合集成模块、专用弱光信号处理及补偿芯片等元件实现优化组合和匹配。
This paper outlines the frequency upconversion and cladding pumping technique.
本文在概述频率上转换和包层泵浦技术的基础上，综述了近年来频率上转换激光器进展，展望了包层泵浦上转换光纤激光器的发展前景。
Frequency upconversion in the visible region has been observed and studied in Tin3+--doped silica fibers pumped by CWML Nd3+: YLF 1053nm laser.
报道了实验研究连续锁模1053nmNd：YLF激光泵浦的掺Tm3+石英光纤中可见光区的频率上转换过程。
The present research situation and the application prospect of three-dimensional display based on frequency up-conversion are discussed.
综述了频率上转换三维立体显示技术的研究现状以及应用前景 ,分析了上转换显示发光的基本原理和实现上转换三维立体显示的基本操作 ,最后通过计算机对频率上转换三维立体显示过程作了模拟 ,并列举了应用上转换三维显示的空中交通管理模型 。
input quantity to frequency conversion type
输入量-频率转换型
Study on Frequency Conversion Problem in Storm Sampling;
对暴雨选样间的频率转换问题的论证
An electronic device that converts one frequency of a radio signal to another.
变频器将无线电讯号从一种频率转换成另一种频率的电子装置
Design of an 8-Channel Audio Sampling Rate Converter and Its ASIC Implementation
8通道音频采样频率转换器设计与ASIC实现
(telecommunication) for converting a signal from one frequency to another.
把信号的一种频率转换为另一种频率的电讯装置。
Coherent Population Transfer and Study on Nonlinear Frequency Conversion Efficiency;
相干布居转移与非线性光学条件下的频率转换效率研究
DDZ-Ⅲ series process electronic control system-Frequency converter
GB/T13635-1992DDZ-Ⅲ系列电动单元组合仪表频率转换器
Several Interfaces between the Precise Voltage-Frequency Converter and Single Chip Computer 8031
精密电压频率转换器与单片机8031的几种接口
Research on Frequency Conversion and Signal Transmission in Millimeter-wave RoF System
毫米波RoF系统中频率转换和信号传输研究
voltage-frequency AD converter
电压频率模-数转换器
I need a certified digital audio transfer rate of 6.8.
需要把数字音频转换器频率改为6.8
Rate Control Strategy in CBR Video Transcoding
恒定速率视频编码转换码率控制策略
digital NMR frequency-to-magnetic field converter
数字式核磁共振频率-磁场转换器
Finally, it is easy to move form the Laplace domain into frequency domain.
最后，从拉氏域转换到频率域也很容易。
Frequency Synthesis Theory for Binary to Decimal Conversion
二进制转换到十进制的频率合成理论
MPEG-2 Video Transcoding Method in DCT Domain Based on Rate Control Using FPGA;
基于FPGA的频率域MPEG-2码率转换硬件实现
APPARENT RESISTIVITY CONVERSION AND APPLICATION OF THE IMPULSE HELICOPTER ELECTROMAGNETIC SYSTEM
频率域直升机航空电磁法视电阻率转换及应用
A new interace circuit for converting capacitance to frequency to period was designed.
设计了一种新型的电容-频率-周期转换接口电路。