查询词典 diode

The author puts forward a constant-current control system of diode rectifier with saturable reactor in electrolytic aluminum.

文摘：介绍了应用于电解铝的加饱和电抗器的二极管整流器的恒流控制系统，简述了饱和电抗器的工作原理，分述了系统构成和系统校正电路的特点。

Objective To evaluate the scleral shrinkage effect of diode laser scleral photocoagulation.

目的 评价半导体激光光凝巩膜使之收缩的效果。

The phase of interference signal is modulated in time domain by sinusoidally changing the injection current of a laser diode.

通过正弦地改变半导体激光器的注入电流在时域内实现对干涉信号的相位调制，形成准外差干涉测量模式，提高了光程差的测量精度。

Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.

论文以激光纵模的分裂理论为基础，提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd：YAG激光器的总体方案，并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析；设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具；建立了两种不同功率激光二极管端面泵浦的Nd：YAG激光实验系统，并对液晶盒的透射性质进行了测试；将未灌注液晶的空液晶F-P摘要标准具插入大功率LD泵浦Nd：、叭G激光谐振腔内，观察到了单纵模激光输出，说明所设计和加工的液晶F一P标准具具有纵模选择能力；将镀有增透膜的液晶盒插入大功率LD泵浦Nd八7AG激光谐振腔内，是否产生了激光纵模分裂现象还难以确定。

A new PSPICE subcircuit model of power PIN diode is developed.

提出了一种PIN 二极管的PSPICE子电路模型。

The main concent include:(1) the modeling for IGBT, Diode, and three-level inverter system based on PSIM software package;(2) simulation and experiment were done for every subcircuit of the inverter, and analysis was given in the paper for three-level inverter.(3) designd the driving and protecting circuit for the IGBTs.

主要内容包括：(1)构建了基于PSIM软件包的IGBT、二极管模型；(2)构建了基于PSIM的三电平变频调速系统模型；(3)对系统中各个支路的电参数进行了仿真和实验，给出了系统的一般设计方法；(4)设计了一套适用于三电平逆变桥的IGBT驱动电路。

Methods In the first experiment, 48 rabbits were inflicted with a posterior subglottic injury using a diode laser, and there were 10 unwounded controls.

在第一阶段实验中，以二极管激光对48只兔子造成声门下后壁损伤，10只未损伤的作为对照。

In radiation dosimetry there are numerous limitations associated with the measurement of isodose curves and depth-dose distributions in high gradient regions of beams by using conventional measuring systems, such as ionization chambers, diode dosimeter, thermoluminescent detectors, and radiographic films.

在辐射剂量学中，利用传统的剂量计例如游离腔、二极体侦检器、热发光剂量计、感光胶片…等，来量测等剂量曲线或是深度剂量分布都有其适用的范围及其限制。

Therefore, zinc oxide and Eu~(2+)-activated strontium aluminate green phosphors were synthesized for the fluorescence conversion of near ultraviolet light-emitting diode, and their properties were examined by means of photoluminescent spectra, thermoluminescent spectrum, X-ray photoelectron spectroscopy and X-ray diffraction.

本研究针对近紫外LED荧光转换材料的要求，采用荧光光谱，热释光谱，X射线光电子能谱，X射线衍射等分析手段，重点研究ZnO绿色荧光粉和Eu~(2+)激活铝酸锶绿色长余辉荧光材料的合成，或提高发光效率和稳定性的新方法及其相关机制。并在以下几方面取得了一些进展： [1]将ZnS与一定量的卤化物MX(X=F，Cl，Br，I；M=Na，K，NH_4，Zn，ZrO)一起煅烧合成出发光性能优良的、具有六方纤维锌矿结构的ZnO绿色荧光粉。

When laser diode illuminates the rough surface moving transversally across the light beam, the feedback light forms the random speckle due to the random pattern of the target surface, causing random fluctuations in the laser output, which is called as self-mixing speckle interference.

让半导体激光器的光学反馈来自垂直地照射的粗糙表面，把光强调制成为随机的散斑信号。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。