查询词典 magneto-optics

The theory of accretion disks are important for many astrophysical phenomena, including Quasars, active galatic nucleic, X-ray binary stars, and young stellar objects. The most important branch of accretion djsk theory is the stability properties of djsks. It is widely considered that the luminosity variations of various astronomical objects are associated with the instability of accretion disk. The viscosity plays an important role in the accretion disk theory, and magnetic field exists commonly in astronomical phenomena. A more realistic analysis of the stabihty of the accretion disk should include both the radjal and azimuthal perturbations because of the strong shear of viscous flow.In this paper, according to the luminosity Variations of Various astronomical objects, we study the radial-azimuthal instability of an isothermal with magnetic field. We find that the radial and azimuthal fields B〓,B〓 are mainly responsible for enhancing the instability of the magneto-acoustic modes and non-axisymmetric modes,and that pulsational oscillations are larger in the radial than in the Z direction. The model may be useful in explaining the periodic light variation of FU orionis and. T Tauri stars.

在许多天体物理现象中，例如活动星系核，X-射线双星和年青的恒星理论中，吸积盘理论起着重要的作用，而吸积盘理论中的一个重要分支是吸积盘的不稳定性理论，普遍认为活动天体的周期，准周期光变现象与吸积盘的不稳定性有关，在吸积盘理论中，粘滞起着重要的作用，而磁场是天体物理中普遍存在的现象，对于几何薄吸积盘不稳定性分析，由于强剪切流的缘故，应该包括径向和环向扰动两个方面，本文结合天体物理中的各种周期，准周期光变现象，研究了含磁场的等温薄吸积盘的径向-环向振荡不稳定性，结果表明：磁场的径向和环向分量对磁声模和非轴对称模的不稳定性的增加起着主要的作用，且径向振荡大于轴向振荡，所得结果有利于解释FU Orionis和T Tauri Stars的周期光变现象。

The relationship between magneto-vibration and magnetic treatment induced tensile residual stress reduction in the steel 45 was studied.

研究了45钢脉冲磁处理过程中残余拉应力与磁致振动之间的相互作用关系。

There are action of exchanging electron and energy in square 4L loop which is made of neighboring 4 iron ions in dilute gold-iron and copper-iron alloy By means of this action, thermoelectrical potential of alloy, magnetic moment of iron ion, Curie temperature, maximal value and minimal value temperature of resistance, specific heat increase and decrease entropy of conduction electron and negative magneto-resistance effect are calculated in this paper and the results are equal to testing value.

利用稀释的金铁和铜铁合金中相邻4个铁离子构成的正方形4L回路上的铁离子间存在交换电子和能量的作用过程计算了合金的热电势、铁离子磁矩和居里温度、电阻极大值温度和极小值温度、传导电子的比热增加和熵值减少、负磁阻效应等，与测量值相符。

Acceleration mechanism of a compact toroid is analyzed in detail,and the CT speedup process is described by a set of radiation magneto-hydrodynamics equations in this paper.

1引言紧凑等离子体环是一种环形等离子体构形，由其内部电流所产的径向磁场和环向磁场约束，如图1所示。

The vacuum system, the two dimensional and three dimensional Magneto-Optical-Trap for the laser cooling and trapping, and the electronics are given special emphasis.

第三章对冷原子干涉仪所需的激光系统进行了详细的研究，提出了相应的激光器的具体的技术指标的要求。

It takes a cylindrical NdFeB multipole permanent magnet composed of several neighboring tegular magnets magnetized anisotropically along radial direction as exterior actuator, and a magnet with the same structure embedded inside the robot body as the inner actuator. The robot screws forward inside pipe under the action between spiral rib on the exterior surface of robot body and fluid dynamic pressure when robot rotates by magnetic torque, which is generated by magneto-mechanical coupling from rotating exterior actuator to inner one.

它以相邻径向异向磁化瓦状多磁极圆筒形NdFeB永磁体为外驱动器，以机器人内嵌同结构的NdFeB永磁体为内驱动器，外驱动器旋转时产生旋转磁场，通过磁机耦合作用于内嵌驱动器形成机器人驱动力矩，在本体外表面螺纹与流体动压力的作用下，实现机器人在管道内的在线旋进。

The main research work include (1) introduces the gemal method and steps of asteroidal magneto design, especially the method and steps of electromagnetism compute, follow these steps, the design parameters such as relative structure dimensions, coil and magnetic circuit parameters can be obtained. This method is easy to use.

本文主要工作如下：(1)本文指出了星形磁电机设计的一般步骤和方法，重点讨论了电磁计算的方法步骤，据此可以得出有关机械结构尺寸、绕组及磁路参数等设计参数；本文提出的磁路计算方法，简单适用；本文还提出了一系列关键参数规范化设计模型的经验系数。

Verifies the voltage wave, electrical current vuive and output power wave of asteroidal magneto, and the veracity of parameters by a series of experiments. The experimental result demonstrates that the error is less than 10% between theoretic value and actual value.

3通过一系列实验验证了星形磁电机空载电压波形、电流波形、短路电流倍数、输出功率等波形和参数的准确性，实验结果表明，理论与实测值相差不到10％。

By using different bidentate auxiliary ligands, a number of one- and two-dimensional azido-bridged coordination polymers and molecular magnets were synthesized, including some with novel structures, and the influences of the ligands on the structure and the magneto-structural correlations in some systems were analyzed.

以不同二齿配体为辅助配体合成了多种一维及二维叠氮桥配位聚合物和分子磁体，较系统地分析了辅助配体对结构的影响及部分体系的磁构关系，并获得几种新的叠氮桥联结构类型。

Our factory has powerful technology strength, advanced equipment, leading technology and a group of professional technicists, mainly produces direct plastic drier, vacuum full auto doser, powerful plastic crusher, magneto-stand, poise nip, horizontal color mixer, vertical high-speed color mixer, outer revolving dyeing mixer,etc. series products.

我厂技术力量雄厚，配备专业技术人员，设备先进，技术领先，主要生产：直结式塑料干燥机、真空式全自动填料机、强力塑胶破碎机、磁力架、码横夹、横置式混色机、立式高速混色机、外部旋转型染色混合机等系列产品。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。