查询词典 electromagnetic

Electromagnetic radiation has a potential hazard on human health, application of gene chip which is high throughout technique for analyzing differential gene expression will supply bio-effect of electromagnetic with many gene level evidence.

电磁辐射具有潜在的健康危害，基因表达差异的高通量分析技术－基因芯片技术的应用，将为电磁辐射生物学损伤效应提供大量基因水平的根据依据，本文就基因芯片技术在微波、极低频电磁场等电磁辐射领域中的应用及其研究进展进行了综述。

Based on the above results, the problems of the electromagnetic interaction between a perfect conducting plate and 1-D/2-D conducting slightly random rough surface and the problems of the electromagnetic interaction between a dielectric spherical particle and dielectric slightly random rough surface are investigated. By using the reciprocity theorem, Small Perturbation Method and Physical Optics approximation, the solution for the composite scattering field from the composite target is derived and evaluated, and the numerical results are discussed and analyzed.

在此基础上，用互易性原理分别研究了一维、二维导体微粗糙面与其上方金属导体平板目标的复合电磁散射及介质粗糙面与其上方球形粒子的复合电磁散射，结合互易性原理和粗糙面散射微扰法及物理光学近似导出了复合散射场的计算公式并进行了数值计算，对计算结果进行了讨论和分析。

MSP430F169 microcontroller was the core components of control and measurement function of an electromagnetic relay characteristic parameter tester. The tester also included DC power module, power amplifier module, constant current source module, keys, and digital tube display module. The tester could test the data of 943-1C-12DS electromagnetic relays including the minimum pull-in voltage, maximum release voltage, relay coil voltage rating when the pull-contact time, release time as well as the contact value of the contact resistance. The system could complete automatic measurement parameters to achieve all the basic requirements of design. And all of the test data was displayed through the 74HC573 digital tube.

摘 要：以MSP430F169单片机作为控制和测量的核心部件，辅以直流稳压电源模块、功率放大电路模块、恒流源模块、按键和数码管显示模块等组成一个电磁式继电器特性参数测试仪，完成对943-1C-12DS电磁式继电器最小吸合电压、最大释放电压、继电器线圈电压为额定值时的触点吸合时间、释放时间以及触点接触电阻值的测试，该系统能够实现成套参数自动测量，所有测试数据通过74HC573数码管进行显示。

Under the control of microprocessor, this pest repeller with an oscillating implement embedded in can produce mulriple-scanning pulse electromagnetic wave with variable frequency. It penetrates walls and transmits by the wire within walls and makes all connected wire producing pulse electromagnetic wave. By irritating the nervous systems of pests, it makes them be on the rack, physiology disorganized and the capability of procreation reduced. The pests are driving away as they are compelled to escape.

QC101型微电脑变频驱虫器：由完全内置的震荡器，在微电脑的控制下可产生多重扫描变频脉冲电磁波，它可以穿透墙壁，沿室内的电源线传播，让所有在墙中或建筑物内相通的电线都发出脉冲电磁波，刺激鼠类和其它害虫的神经系统，使老鼠和其它害虫感到极端恐慌，生理功能紊乱，繁殖能力降低，感到无法生存而逃离现场。

One of the major contributions of Maxwellian theory was that it set up an essential relation between the electromagnetic field and light in vacuum, and defined the speed of electromagnetic wave as the constant speed of light c , which implies a hypothesis that the rest mass of the photon should be zero exactly.

麦克斯韦电磁理论的一个重要贡献在于它将真空中的电磁场与光联系起来，并将电磁场的传播速度定义为真空的属性，即恒定的光速 c ，因而建立了电磁波与光之间的本质联系。

To develop a new electromagnetic riveter, the author have comprehended the development of electromagnetic riveting technology EMR...

围绕研制新型电磁铆接设备的思路，详细了解了国内外电磁铆接技术的发展状况，对现有铆接设备存在的问题进行了分析。

Nowadays we suggest: circular lifting electromagnets for scrap metal, from small and lightweight (series EMG 078) up to superheavyweight (series EMG 230); electromagnets for loading of slabs, rail, section and sheet products, tubes, steel coils; permanent lifting magnets for loading small parties of metal; grabs for scrap metal and clamshells for loose materials; pendant and self-unloading electromagnetic separators, electromagnetic pulleys, sources of a uninterrupted power supply and control system for electromagnets; power supply systems of electromagnets for installation on any mobile excavators; traverses all types; electronic device for weighing.

如今，我们建议：圆形的举升电磁铁适用于碎金属片，从小型与轻型（EMG 078系列）到超重型（EMG 230系列），永久举升磁铁适用于装载金属小件，抓取装置适用于碎金属片，蛤壳适用于松散物料。采用新技术的电磁铁设计与应用的持续完善，使得其容量平均增加了20-30%，这一数字是通过在我们公司进行的如同用户实际操作的大量测试得以确认的。

The influence of low-frequency electromagnetic field on microstructure and morphology of primary Si particles of Al-19.2% Si alloy ingot specimens prepared by semicontinuous casting process was investigated with electronic optical microscopy, where the specimens were taken from different parts of the cast to which different electromagnetic fields are applied.

采用低频电磁半连续铸造技术制备Al-19.2% Si合金铸锭，利用电子光学显微镜对铸锭的显微组织进行分析比较，研究了电磁场强度和频率对初生硅颗粒形貌的影响；利用测温技术对合金的凝固过程进行监测，研究低频电磁场对凝固前沿温度场的影响。

In the method, the orbit of targets and the radar coordinates and parameters are put to calculate attitude and dynamic parameters of targets in line of sight. And then the dynamic data are generated according to the electromagnetic modulation model of the movement of targets including motion at high speed, spin, precession on electromagnetic wave.

该方法首先确定目标的轨道和雷达的布站坐标及工作模式，而后计算目标在雷达观测视线(line of sight， LOS)方向上的姿态和运动参数，最后根据空间目标高速运动、自旋、进动等在电磁波上调制的数学模型生成动态测量数据。

In this paper, according to the theory of electromagnetic fields, firstly, electromagnetic field of large and medium asynchronous motor is calculated from the angle of coupled fields, secondly, the end voltage of the stator is taken as constraint condition and starting current in stator is iterated in the numeral computation process, finally starting current and starting torque at rated voltage are gained, and by comparing calculation results with test results ,starting performance of large and medium asynchronous motor meet the demand of project practice.

本文根据电磁场理论，从耦合场的弱耦合角度首先计算了大中型异步电动机的电磁场，在电磁场的数值计算过程中，以定子端电压为约束条件，对定子起动电流进行了迭代计算，得到了额定电压下的起动电流和起动转矩，并把正弦时变场计算结果与实测结果进行对比，表明大中型异步电动机的起动性能的计算结果满足工程实际的需要。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。