Design of the reflector shape for dual frequency base-station antennas;
双频基站天线中的反射板形状设计
On the basis of different behaviors of alternative electromagnetic field for induction and electromagnetic shaping, the process of dual frequency electromagnetic shaping of molten metal was firstly presented.
从固态金属感应加热熔化和液态金属电磁成形两个角度出发 ,讨论了金属熔体双频电磁成形中的频率选择 ,物理量的分布以及两种双频电磁成形的试验过程。
On the basis of the theory of electromagnetic shaping, the concept of dual frequency electromagnetic shaping of liquid metal was presented, which mean that the one frequency electromagnetic field is used to melt the solid metal above its melt temperature and the other frequency electromagnetic field is used to make the liquid metal to a final shape.
对液态金属电磁成形的物理和数学模型进行了分析 ,提出了双频电磁成形的方法 (利用两种频率的电磁场实现固态金属无接触加热熔化和熔化后的金属无模壳电磁成形 )和原理。
Design of mutimode & dual-frequency microwave sintering furnace;
多模腔双频微波烧结炉的设计
Novel Design of an H-shaped Dual-frequency Microstrip Antenna;
新型h形双频微带天线的设计
Design of Dual-frequency and Dual-circular-polarization Microstrip Antenna;
双频双圆极化微带天线实验设计
Analysis and inspection of double-frequency clock use in Linux kernel;
Linux内核采用双频时钟的分析及检验
There are few ultrasonic generators for sludge treatment specifically, so we designed a double-frequency ultrasonic generating trough which could adjust frequency, energy density and treating time flexibly.
同时,单频超声波处理后污泥的厌氧产气累积增量高于双频超声波,为40。
Design of dual-band circularly polarized annular slot antenna for wireless local area network applications;
无线局域网的双频圆极化圆环缝隙天线设计
Design and simulation of novel dual-band microstrip antenna;
一种新型双频微带天线的设计与仿真
Design of a Dual-band Dual-Polarization Stacked Microstrip Patch Antenna;
一种双频双圆极化层叠结构微带天线的设计
Hardware design of double frequency wireless sensor network node;
双频无线传感器网络节点硬件结构设计
A novel three-phase power factor correction with double frequency is proposed in this paper.
文中提出了一种新型的双频三相全桥功率因数校正器拓扑结构。
real time,high precision,long distance measurement method by double frequency ultrasound is presented in this article.
本文介绍了一种在空气中实时、高精度、大范围双频超声波测距的原理及方法。
Extracting flavone from lygodium japonicum(Thunb.) Sw. assisted by bifrequency ultrasound;
双频超声强化从海金沙中提取黄酮的实验研究
assisted by bifrequency ultrasound.
本文进行了双频超声强化从海金沙中提取黄酮的研究,结果显示,在27℃,海金沙质量与乙醇体积比为O。