查询词典 magnetic steel

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

A magnetic compass is an instrument showing direction based on phenomenon that a magnetic bar or needle swinging freely in the earth's magnetic field will direct itself to lie in a magnetic south-north position.

科技文章是反映客观事物的，文章中不能掺杂作者个人的主观意识，对客观事物的陈述必须客观、准确。这既是科技文章的特点，也是对科技文章翻译者的基本要求。

A magnetic compass is an instrument showing direction based on phenomenon that a magnetic bar or needle swinging freely in the earth's magnetic field will direct itself to lie in a magnetic south-north position.

科技文章是反映客观事物的，文章中不能掺杂作者个人的主观意识，对客观事物的陈述必须客观、准确。

With the precondition of not importing magnetic charge, we gave rules of magnetic flux quantization, and the relations between magnetic flux quantization, Principle Quantum Number , Angular Quantum Number , Magnetic Quantum Number and Spin Quantum Number were built.

在不引入磁荷的前提下，给出了磁通量子化规则，建立了磁通量子化与主量子数、角量子数、磁量子数和自旋量子数的联系。

The laser optically pumped cesium magnetometer is a magnetic measurement instrument that is used to measure the absolute total intensity magnetic field, it is based on that the energy levels of cesium atoms in a magnetic field produces Zeeman effect and makes use of the principle that laser pumping and the RF magnetic field produce magneto-optical double resonance to make.

激光铯光泵磁力仪是一种用来测量磁场总强度的绝对磁测仪器，它是以铯原子的能级在磁场中产生塞曼效应为基础，利用激光泵浦和射频磁场产生光磁双共振的原理而制成的，激光泵浦铯原子是磁力仪结构的核心部分。

In addition, the curie point phenomenon of magnetic medium achieves self-regulating temperature in treatment, and the pattern of magnetic medium into tissues will also affect the hyperthermia targeting in vivo. To improve the histocompatibility of magnetic medium can ensure the clinical safety of the magnetic induction hyperthermia in tumor therapy.

同时，磁介质的居里点现象能实现治疗时的自控温，其进入组织的方式也会影响热疗的体内靶向性，另外，提高磁介质的组织相容性能够保证磁感应治疗的临床安全性。

Surface as the surface magneto-optic Kerr effect magnetic important experimental tool has been widely used in magnetic and orderly, magnetic anisotropy, multi-layer interlayer coupling in magnetic ultra-thin films, as well as between the behavior of phase-change research.

表面磁光克尔效应作为表面磁学的重要实验手段，已被广泛应用于磁有序、磁各向异性、多层膜中的层间耦合以及磁性超薄膜间的相变行为等问题的研究。

Our company specializes in producing all kinds of material, a variety of cold-drawn round bar, six angle steel, square steel, flat steel and various special-shaped steel, as well as various specifications of stainless steel standard fasteners.

本公司专业生产各种材质，各种规格的冷拉圆钢、六角钢、方钢、扁钢及各种异型钢，以及各种规格的不锈钢标准件紧固件。

The main products have wire wheels, wire wheels, stainless steel wire wheels, pipes pass sweep, steel, copper wire brushes, peeling wheels, roller brush, zippers polishing brush, polishing brush hole, pipe brush, pen and brush, steel wire wheel handle , polishing brush, metal brush, metal surface polishing brushes, paintbrushes peel, roll the long axis of wire brushes, steel round bowl type, flat type wire wheels, disc-type steel wheel, industrial brush business.

主要产品有钢丝轮、铜丝轮、不锈钢丝轮、管道通扫、钢、铜丝刷，剥皮轮，滚筒刷，拉链抛光刷，内孔抛光刷，管道刷，笔型刷，带柄钢丝轮，抛光刷，五金制刷，金属表面抛光刷，剥漆刷，长轴钢丝辊刷，碗型钢丝轮，平型钢丝轮，碟型钢丝轮，工业用刷的企业。

The company mainly engaged in 4.8, 8.8, 10.9, 12.9, Metric, English, American, German system, the Japanese system, anti-teeth, small teeth, 1.6, with 1.6, nuts, bolts high-strength steel structures, steel structures Shear-twisting screws, nails welded steel structure; 10.9 high-strength steel structure screws; series since drilling screws, chemical screws, chemical fastening agents, advertising screws, Kenuo Di wallboard nails, Chunyu wallboard nails, screw the whole tooth , The top explosions,(stainless steel 2.60, within 1.6, nut, pull explosion, since the attack, machine wire, Ping-, bomb-) copper screws series; screws, a pin T-type screwdriver, screws live Festival , To pin screws, the head screws, cement Dan head screws, belts screws, tight set-key, cylindrical pin, a round nut, Kahuang, Spring, Pin, butterfly screws, orchid flower,扎head and dumping of deduction, 1.30 laps, furniture screws screws, construction fastening accessories (import drilling Tsui, 2.60 keys, twist drill, a round Banya) Gezhongfeibiao special screws.

本公司主要经营4.8级、8.8级、10.9级、12.9级、公制、英制、美制、德制、日制、反牙、细牙、外六角、内六角、螺母、高强度钢结构螺栓、钢结构扭剪形螺丝、钢结构焊钉；10.9级高强度钢结构螺丝；自钻螺丝系列、化学螺丝、化学紧固剂，广告螺丝、科诺迪墙板钉、春雨墙板钉、全牙丝杆、顶爆、（不锈钢六角、内六角、螺母、拉爆、自攻、机丝、平介、弹介）铜螺丝系列；拉钉、钢钉T型螺丝、活节螺丝、地脚螺丝、方头螺丝、水泥旦头螺丝、皮带螺丝、紧定、平键、圆柱销、圆螺母、卡簧、弹簧、销轴、蝶形螺丝、花兰、扎头、卸扣、三角圈、家具螺丝螺丝、建筑扣件配件系列；（进口钻咀、六角匙、麻花钻、圆板牙）等各种非标特殊螺丝。

The gross of the rural public goods supply had a serious deficiency; the configuration of the rural public goods supply had an unbalance; the efficiency of the rural public goods supply had a lowlihead.

这些困境已经成为制约广大农村地区经济快速增长的主要因素，严重束缚了农村的经济社会发展，影响了农民生活水平的提高。

Throughout the global financial crisis, our stock market has operated smoothly and remained one of the most active and successful bourses in the world.

本次全球金融危机以来，香港股市一直正常平稳运作，成为世界上最活跃、最成功的交易所之一。