查询词典 magnetic

The viscosity of the magnetic fluid can change under magnetic field because there is the magnetic particulate in the magnetic fluid.

由于磁性流体中磁性微粒的存在，使得磁性流体的粘度在磁场的作用下也会产生变化。

The effects of the shear rate of the magnetic fluid, the volume fraction of the suspended magnetic particles, concentration of surfactants and the external magnetic field strength as well as the orientation on the viscosity of the magnetic fluid are analyzed.

采用毛细法粘度计测量了水基Fe铁磁流体和水基Fe_3O_4铁磁流体的粘度，分析了不同剪切速率、磁性粒子体积份额、表面活性剂含量、温度以及外加磁场强度和方向等因素对铁磁流体粘度的影响。

The principle of capillary tube viscometer was analyzed and the measuring apparatus was built to measure the viscosity of the Mn-Zn ferrite magnetic fluid. The effects of the volume fraction of the suspended magnetic particles, mass concentration of surfactants, temperature and the external magnetic field strength as well as the orientation on the viscosity of the magnetic fluid were analyzed.

分析了毛细管粘度计测量粘度的原理，搭建了磁流体粘度测量实验台，测量了锰锌铁氧体磁流体的粘度，分析了不同磁性粒子体积份额、表面活性剂质量含量、温度以及外加磁场方向和强度等因素对磁流体粘度的影响。

Aqueous magnetic fluids are prepared by the physical and chemical means, and the influence of the crafts of the preparation on the magnetic fluid characters is discussed. The capillary tube viscometer is used to measure the viscosity of the magnetic fluids in a magnetic field.

本文分别采用物理和化学方法制备了水基Fe铁磁流体和水基Fe_2O_4铁磁流体，并讨论了制备工艺对水基Fe_3O_4铁磁流体样品磁化特性、粘度特性和悬浮稳定性的影响。

The results indicate that CEPNPs are core-shell nanostructure, the particles size is 75 nm on an average; CEPNPs magnetic fluid looks black and viscous and stable, and the viscosity of CEPNPs magnetic fluid decreases with increasing shear rate without magnetic field and increases with the applied magnetic field.

结果表明：制备的CEPNPs具有壳／内核包覆结构，平均粒径在75nm左右；以其制备的磁流体外观呈黑色粘稠状，稳定性好，在无磁场条件下磁流体粘度随转子转速的增大而减小，有外磁场时，磁流体粘度随磁场强度增大而增大。

At the totality the north and south magnetic poles split apart, with sunspots being temporary magnetic poles, which drift around the surface of the Sun from upwellings of magnetic current deep inside the Sun, until the north and south magnetic poles reform themselves in the opposite positions from what they were before the totality.

在整个南北磁极分裂，与太阳黑子被临时磁极，而漂在水面的太阳从upwellings的磁流深处孙，直到南北磁极改革本身相反的立场从他们面前的总和。

The scientist has thought of two solutions: One kind is the gas floats the law, even if the train massive jet uses its reaction to the railway rail ground to do the best you can the train to float off; Another kind is magnetism floats the law, namely uses between two magnetic poles of the same name between the magnetic repulsions or two different famous magnetic poles the magnetic attraction causes the train to surface the boat from the railway rail.

科学家想到了两种解决方法：一种是气浮法，即使火车向铁轨地面大量喷气而利用其反作用力把火车浮起；另一种是磁浮法，即利用两个同名磁极之间的磁斥力或两个异名磁极之间磁吸力使火车从铁轨上浮起来。

The fluid level gage indicates the position of the magnetic buoy through that the magnetic buoy induces the direction changes of magnetic poles caused by the indication magnetic bodies in the indication tube which is parallel to the main tube, thereby indicating liquid level in container.

该液位计利用磁性浮标感应与主体管平行的指示管内指示磁体引起的指示磁体南北极指向排列的变化指示磁性浮标的位置，从而指示容器内液位。

The manufacturer specializing in the production of magnetic security Dart target, magnetic shutter Dart target, velvet magic dart target, paper cloth Dart target, CD box Dart target, EVA Dart target, the international rubber game, Bing Xiangtie, car stickers, outdoor advertising stickers, magnetic Photo Frame, Dijiao Bingxiang Tie, health magnetic insoles, the compass, NdFeB and ferrite, permanent magnet plastic sheet / roll, the iron film material / roll, I have been Secretary of Dart target patent applications , Quality assurance, cheap, but also according to customer design specifications of a different material products and products in the printing company logo.

本厂家专业生产磁性安全飞镖靶，磁性卷帘飞镖靶，绒布魔术镖靶，纸布飞镖靶，CD盒飞镖靶，EVA飞镖靶，国际橡棋，冰箱贴，汽车贴，户外广告贴，磁性相框，滴胶冰箱贴，磁性保健鞋垫，指南针，钕铁硼和铁氧体，塑胶永磁片材/卷材，铁粉胶片材/卷材，我司的飞镖靶已有申请专利，品质保证，价格便宜，也可根据客户要求设计不同材质有规格的产品，且可以在产品上印刷公司logo。

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。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。