电磁的

A novel direction of arrival and polarization estimation of electromagnetic vector sensors mounted on the airframe is proposed based on biquaternion. The signal processing model for EM-sensor mounted on the airframe is made by biquaternion and then the eigenvalue decomposition of spectral matrix is obtained by means of the EVD of its quaternion adjoint matrix. The memory requirement for data is reduced, and more accurate estimation result is gotten by deducing the stronger orthogonality constraint between the sin- gal and noise subspaces on the field of biquaternion. The performance of the new algorithm is confirmed through numerical examples.

针对机载电磁矢量传感器阵列DOA和极化参数估计问题，提出了一种基于复四元数估计方法，该算法利用四元数建立机载电磁矢量传感器阵列信号处理模型，然后利用四元数联合矩阵的特征分解得到阵列数据相关矩阵的特征分解，一方面使得计算过程中数据的贮存量大大减少，另一方面通过推导得到信号子空间和噪声子空间在四元数域上的正交性从而使DOA和极化参数佑计的精度更高，仿真证实了本算法的有效性。

In this thesis, the research and the development of electromagnetic safety materials have been reviewed. On the basis of the theory of the electromagnetic field, the electromagnetic wave and the interaction between the materials and the electromagnetic wave, several kinds of new composites have been prepared by adopting new methods, electroless plating and a kind of method of Fe replacement chemical aggradation, and studied by advanced measuring and analyzing components.

对电磁防护材料的国内外研究现状进行了研究，从电磁场与电磁波理论及电磁波与材料之间的交互作用出发，采用新的思路和方法，采用化学镀和一种Fe置换化学沉积法制备了新型的电磁防护材料，并采用先进的测试分析手段研究了材料在2～18GHz电磁波频段范围的电磁波吸收性能和在100KHz～1.5GHz电磁波频段范围的电磁波屏蔽性能。

Companies rely on advanced quality management system, strong technology development strength - in constant demand by customers for the purpose of focus, the commitment to the development of China's vacuum valve creatively continuously reliable performance, beautiful appearance of the products, have in hand , gas, electric butterfly valve, valve, damper valve, electromagnetic valve differential pressure, electromagnetic valve, ball valve, valve plates, etc. more than 10 series vacuum valves, as well as various specifications and models of high school low-pressure valve and hydraulic control valves.

公司依靠先进的质量管理体系，雄厚的技术开发力量—在不断地以顾客需求为关注焦点的宗旨下，致力于我国真空阀门的发展，创造性地不断推出性能可靠，外形美观的产品，有手，气、电动的蝶阀、隔膜阀、挡板阀、电磁压差阀、电磁截止阀、球阀、插板阀等10多个系列真空阀门，以及各种规格和型号的高中低压阀门和水力控制阀门。

It getting rid of the faulty discomfiture condition of the electromagnetism induction calefaction technology for appliance calling, probing into a new thinking and practice mode for nation.

旨在引导家电行业摆脱电磁感应加热技术不完善的尴尬境地，为国内的电磁感应装置及其它应用电磁感应加热技术的家电设计探讨一种新的思考及实践模式，并以此为突破口，推动电磁感应加热技术在其它家电，如电暖器、电磁热水器、电磁饮水机等加热电器中的应用，增强国内家电行业在国际市场上的竞争能力，实现智能家居的目的。

It getting rid of the faulty discomfiture condition of the electromagnetism induction calefaction technology for appliance calling, probing into a new thinking and practice mode for national electromagnetism induction equipment and other setting which use electromagnetism induction technology, and based on it, boosting up the electromagnetism induction technology apply in other appliance, such as electrical warmer, electric cooker, electrical watering trough and so on. At the same time, it enhanced competition ability in international market for national appliance calling, and realized the aim of the intellectualized family.

旨在引导家电行业摆脱电磁感应加热技术不完善的尴尬境地，为国内的电磁感应装置及其它应用电磁感应加热技术的家电设计探讨一种新的思考及实践模式，并以此为突破口，推动电磁感应加热技术在其它家电，如电暖器、电磁热水器、电磁饮水机等加热电器中的应用，增强国内家电行业在国际市场上的竞争能力，实现智能家居的目的。

The variation regularity is discussed that the stress, temperature and deformation of the current-carrying annular plate are altered with the variation of loaded electromagnetic parameters. According to the relation between the deflection of annular plate and the parameters, it is proved that the deformation and stress can be controlled by changing the electromagnetic and mechanics parameters.

变换电磁参量，讨论了载流环形薄板应力、温度及变形随外加电磁参量的变化规律；根据圆环形板的挠度与参量之间的变化规律，并通过实例证实了可以通过改变电、磁、力场的参数来实现对板壳的应力、应变状态的控制。

The main contents and contributions of the paper are summarized as follows:The matching technology between drum electromagnetic brake and vehicle is studied and the braking force distribution coefficient of the tractor and trailer is confirmed. According to the related standard, the mathematic model of the braking moment which the electromagnetic brake should provide has been ascertained using the matching theory. The matching technology of trailer train brake system has been introduced in the type selection and analysis of the brakes.

本文针对电磁制动器设计的关键技术进行研究，以建立电磁制动器集成设计平台为目标，主要开展了以下几个方面的研究内容：对汽车列车制动力匹配技术进行了研究，确定了牵引车和房车的制动力分配系数，依据相关标准运用制动器与整车性能相匹配的理论，建立了房车所需制动力矩的数学模型，用以对制动器进行选型设计，并给出了集成设计平台中整车匹配模块的算法流程图。

Metal casing can make the amplitude of the electromagnetic wave that the receiver received to extenuate strongly and the phase of that to displace strongly.

金属套管的几何参数及物性参数对电磁测井的影响很大，会对接收到的电磁波信号产生强烈的幅度衰减和相移作用；金属套管对井间电磁测井的影响具有一定的规律性： 1。

One-dimensional time domain helicopter-borne electromagnetic responses are computed using G-S transform and Gauss numerical integral. The variation of electromagnetic responses due to bird height is analyzed, and then the variation of bird height is transformed to the variation of pseudo-layer thickness of zero conductivity to eliminate the error of the altimeter.

采用G-S变换以及高斯数值积分法，形成了时间域直升机的航空电磁响应正演样本集，分析了飞机测量过程中吊舱高度变化对电磁响应的影响，并将吊舱高度的变化等效成电导率为零的假层厚度的变化，以去除高度计等的影响。

Extensive cooperation with Tartu University, European universities and industry are conducted as well, which gives students excellent possibilities for practicing and working abroad.

相应的课程都将教，在的塔林理工大学&/强&&/电磁&和的塔尔图大学&/强&&/电磁&在紧凑的课程整合讲座，实验室和理论课封锁仅数天时间的整合也使外国访问学生。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。