1) dual frequency method
双频梯度法
2) dual frequency
双频
1.
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
2.
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。
3.
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。
3) dual-frequency
双频
1.
Design of mutimode & dual-frequency microwave sintering furnace;
多模腔双频微波烧结炉的设计
2.
Novel Design of an H-shaped Dual-frequency Microstrip Antenna;
新型h形双频微带天线的设计
3.
Design of Dual-frequency and Dual-circular-polarization Microstrip Antenna;
双频双圆极化微带天线实验设计
4) double-frequency
双频
1.
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
2.
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。
5) dual-band
双频
1.
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
2.
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
3.
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
6) double frequency
双频
1.
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
2.
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。
3.
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。
参考词条
补充资料：变量-梯度法
变量-梯度法
variablegradient method
(6)。于是得v一户，，d，;+f x22剐么一冬对+二:。在 J 0 JO‘l一ZxlxZ>o范围内，系统的平衡状态是稳定的。若另取al，~ 2(l一二，xZ)2 一xf(1一x:x:)2，己21= xl(l一x，xZ)2，则可求得另一个v函数宕氛-、式，约束条件为1一xlxZ>o，比前一个还好。b一anl一ong一t一dufo变t一梯度法(variable一gradient method) 对非线性系统云一f(x)，了(0)~0选择李雅普诺夫函数的一种方法。 令v(x)为一备择的李雅普诺夫函数(见李稚普诺夫方法)，V(x)可表示为 弃.那.弃. V(x)=于x，+升x:+…+笋x，(l) axl一‘’axZ一‘’‘肚一”X XX陌以尸|阮 一一 「“人，、、，，，、}刁‘g、·，一‘rad“气‘，一} 口V/ax，V/a xZ 月 X 日.…Z了 V于是，式(1)可写作 v(x)一比(x)」T毖对上式两边积分，可得李雅普诺夫函数(3)V‘x，一上罕d: 一J;「:(·)〕·瓮d，一{:仁，‘X，〕T“(4)这是从状态空间原点到一任意点(x，，xZ，…，x，)的线积分。由式(3)有比(x)〕Tdx二dV(x)，式(4)中的积分与积分路径无关。最简单的积分路径是沿状态向量x的诸分量方向(xl，xZ，…，x二)顺序进行式(4)中积分的计算，即v(X)一{;〔:(X):·‘X一{:’、1(“1，。，…，。)‘“】 +J:292‘Xl，6z，0，一O，d“2+…5)并一必+{;”g。(Xl，XZ，X3，··一氏，d氏于是，变量一梯度法工作就要选择一向量函数g(x)将这一函数按式(5)积分以获得标量函数V(x)。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。