定向器

These performance characteristics of hybrid or non-hybrid directional couplers are self-explanatory.

这些性能特点的混合或非混合式定向耦合器，是不言自明。

To decrease the affection to the device under test, the power is always measured through directional couplers.

为了减小对待测系统的影响，功率测量一般通过定向耦合器来进行。

According to the principle of vector control system, a simulation model of SPWM inverter - fed induction machine and its control system with the reference frame fixed to the rotor is established in this paper.

该文根据感应电机矢量控制的基本原理，基于MATLAB／SIMULINK构造了电压型SPWM逆变器供电的感应电机按转子磁场定向的矢量控制系统的仿真模型。

Trans-Blot Plus Cell 170-3990 Trans-Blot Plus Cell With Plate Electrodes and Super Cooling Coil, includes 3 gel holder cassettes, buffer tank, lid with power cables, 6 fiber pads, 1 pack blot absorbent filter paper (26.5 x 28 cm, 30 sheets), roller, stirbar 170-3991 Trans-Blot Plus Cell and PowerPac HC Power Supply Accessories 170-3994 Trans-Blot Plus Gel/Cassette Assembly Tray 170-3995 Fiber Pads, 27 x 28.5 cm, 2 170-3996 Blot Absorbent Filter Paper, 26.5 x 28 cm, 60 sheets 170-3997 Stirbar 170-3998 Trans-Blot Plus Roller, 6 wide 170-39 Trans-Blot Plus Gel Holder Cassette With Clamps 170-4990 Trans-Blot Plus Super Cooling Coil 170-4991 Trans-Blot Plus Platinum Anode Plate Electrode 170-4992 Trans-Blot Plus Stainless-Steel Cathode Plate Electrode 170-4995 Trans-Blot Plus Cell Buffer Tank 170-4996 Trans-Blot Plus Cell Lid With Cables 170-4997 Gel Holder Cassette Clamps, for Trans-Blot Plus cell, set of 3 9 规格:说明:运用Mini-PROTEAN II 多道筛选仪,可以快速有效地筛选 40 种不同的抗体或血清,无需把western

转印条件可调，能在很大的分子量跨度上获得最佳转印效果*耐用的板式电极能产生强大而均一的电场，而且电极在槽内的位置灵活可换；不论运行1、2 或3 个转印夹，电极间距可调节到最小以获得最大的场强和转印效率*凝胶支架转印夹保证整个凝胶与印迹膜表面的均衡接触*转印夹的铰链设计能防止凝胶滑动，便于转印夹组装*颜色标记的转印夹及电极板确保在转印槽内的正确定向*特级冷却芯和冷却水循环器进行温度调节―可理想地用于天然酶或高强度转印，或用于延长转印时间时减少缓冲液的损耗*可选择的组装盘是凝胶三明治和转印夹组装的理想选择 Trans-Blot Plus 转印槽能从单向和双向大格式凝胶上均一、高效地转移蛋白―配合使用新推出的 PowerPac HC 电源，多数蛋白都可在1530 分钟内完成转印。

A directional coupler is composed of multiple photonic crystal monomode waveguides placed in parallel and adjacent to each other.

定向耦合器由多个光子晶体单模波导平行、邻近放置构成。

Narrow wall and broad wall apperture coupler. Experiments have been made to test them. Other types of discontinuity we have studied include: coax and SIW transformer; SIWs\' coupling on different layers; branch coupler based on SIW; post inside SIW; the H-plane discontinuity ; bend structures; cross structures; \'Y\' branch of SIW etc.

本文所研究的其它不连续性结构还包括：同轴波导与SIW的转换接头；不同层间SIW的转换；基于SIW的分支定向耦合器；基片集成波导中的感性金属杆；基片集成波导的H面不连续性结构；各类拐角结构；波导交叉结构；波导'Y'分支结构。

The parameters include waveguide width: 8μm, titanium film thickness:50~60nm, index change: 0.006, diffusion temperature: 1050 and diffusion time: 9~10 hours.Designed and produced a 2 X 2 coupler Optical switch and a 1 X 2 digital optical switch. The coupler optical switch was produced by AP reversal structure, with the main parameters such as total length of switch: 30mm, waveguides center distance: Hum, interaction length: 17mm, and at 17V with a crosstalk of -18dB. The digital optical switch was produced by asymmetry electrode Y branch structure. The main parameters of this switch such as switch length: 25mm, the angle of Y branch: 0=0.1? center distance at branch end: 30μm, the center distance of electrons: 12μm, and at 27V with a crosstalk of 18dB.

设计并制作了2×2耦合型光开关和1×2数字开关，其中耦合型开关主要采用的反转Δβ定向耦合器开关，开关长度约30mm，波导宽度8μm，波导间距14μm，耦合区长度17mm，电极主要采用三电极结构，最终测得对TE模开关电压＜-15，消光比≈18dB；数字开关采用非对称电极Y分叉数子开关结构，利用BPM软件模拟了其开关特性并优化了器件参数，制作中采用的主要参数为：开关长度约25mm，Y分叉角θ=0.1°，Y分叉末端波导间距30μm，电极间距12μm，最终测得开关电压27V，消光比≈18dB。

The ship electric propulsion system that we are going to discuss consists of the following parts: six-phase double Y winding shifted by 30°synchronous motor, diode clamped three-level inverter, fixed pitch propeller and control installment of electric propulsion systems based on air-gap-field orientation vector control.

本论文所研究的船舶电力推进系统各个组成部分分别是：双Y移30°六相电励磁同步电动机、二极管嵌位式三电平逆变器、定距螺旋桨船舶推进器和采用基于气隙磁场定向矢量控制策略的电力推进系统控制装置。

In order to optimize the shape and size of reamers,the mathematical model for shape optimization of reamers is established.

为优化水平定向钻扩孔器的形状以及尺寸，建立了扩孔器形状优化的数学模型。

Quasi-constant torque control is used when the speed is lower than 125 km/h, and constant power control is applied when the speed is higher than 125 km/h. Direct rotor flux oriented control system is employed and three-level neutral point clamped traction inverter with SVPWM control is adopted.

在速度低于125km/h采用准恒转矩控制，速度高于125km/h采用恒功率控制，采用直接转子磁场定向控制系统，牵引逆变器采用空间电压矢量控制的带中点钳位二极管的三电平拓扑结构。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。