查询词典 external field

This paper deals with the actuation of magnetic endoscopic robot capsule by external magnetic field.

研究了利用外部磁场驱动胶囊内窥镜机器人的方法。

The calculation of anisotropic plate with aerofoil manhole under external load was carried out.The numerical solution of hole-edge stress field was obtained.

对含机翼检修孔的正交各向异性板在外荷载作用下进行计算，得到孔边应力场的数值解。

A new GIS software company in China as well as its industry backgroud,also the GIS industry competition structure and development status. Furthermore, a study was done on both of its competitive structure and other factors against the external environment and of its strengths, weakness, opportunities, threats and other factors facing the internal environment in this field. Based on this study and the mission and the developing target of the company, established the general developing strategy of the company --- based upon Geospatial information industry, continuing to keep the monopoly status and anabasis GIS industry at the same time.Rely on the photogrammetry technique to build the brand in 3D GIS market to gradually form competition advantage.Take technique development tactic, such as intergrate with other kind of techniques, combine with 3D core techniques and purchase 3rd-technique;take tactic to make products cater to market, such as promote the products service definition, enhance the added-value development ability, improve products management and design, adopt 3rd products,etc;And particuliar marketing tactic,such as service marketing, relationship marketing, difference marketing and brand marketing,etc. At last, point out that should import professional managers to promote company quality and industry competition ability.

本文描述了一个新进入 GIS 领域的软件企业——适普软件有限公司的发展历史及所处行业背景，客观分析了它所处 GIS 行业的竞争结构、发展现状等外部环境，通过深入分析公司所面临的机遇、威胁、优势、劣势等因素后，结合公司的宗旨及整体发展目标确立了公司的总体发展战略——立足空间地理信息领域，维护公司在摄影测量市场的垄断地位，同时进军 GIS 市场，以摄影测量核心技术为依托，在三维 GIS 细分市场创立品牌，并逐步形成竞争优势，同时提出采用多种渠道发展技术、产品全方位适应市场、强化市场营销及市场开发多元化的竞争策略，并其进一步细化为技术开发策略，如与其他信息技术的结合、与真三维核心技术的结合、技术收购策略等；产品策略，如提高产品的服务理念、提高产品二次开发能力、提高产品管理和设计、采用第三方产品开发等；以及市场营销策略，如采用服务营销、关系营销、差异化营销、品牌营销等方式；最后提出公司应该引入职业经理人制度从管理角度全面提升公司质量，提高行业竞争力。

Shadow effect can not be neglected for thermal analysis of spacecraft,Accroding to the angle between solar light and antenna orbit plane and its orbit location,analytical geometry method was used for accurately calculating solar radiation heat flux distribution of reflector surfaces.To analyze the temperature field under heat flux,the formulations of net radiation flux density between two gray elements and the net flux density of gray surface under external thermal flux were deduced.Based on the characteristic of space environment,the nonlinear temperature distribution in transverse direction of reflector shell self radiation were considered,the finite element formulations were given for orthogonal material layered shell by Galerkin method.A layered element including a inner heat source layer was proposed,and the finite element formulation expressed by DOF of the inner heat source layer were put forward with temperature and heat flux boundarys between adjacent layer.

单馈反射面赋形天线是未来星载天线发展的一个重要形式，分析了基于物理光学、几何光学和几何绕射理论的理想反射面辐射场；介绍了基于几何光学的反射面天线赋形方法；针对赋形过程中辐射场的快速分析要求，比较分析了基于物理光学的Fourier-Bessel和Jacobi-Bessel级数展开方法以及GB展开分析方法；利用GB展开快速分析方法在20GHz频率下对0.6m口径的天线进行赋形分析，实现中国大陆的30dB增益覆盖，通过数值计算研究了固定增益期望下的口径尺寸随频率的变化，以及频率为20GHz的不同尺寸天线赋形后的覆盖目标区域最大增益的变化情况。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

The apparent horizon is the factor that Yin Chaoyu emphasized a lot in many of his paintings, which has even turned certain "principal", but except emphasizing the depth of field like the past, this "principal" that makes people associate the classicality of external images has more structural meaning of pictures.

"地平线"，是尹朝宇在很多画中非常强调的部分，甚至成为了他创作中的某种"原则"，但是这一在表象上让人联想到古典的"地平线"，除了像过去那样以此来强调景深之外，更多的则是画面的结构性的意义。

Based on the radial and axial solenoid formula, the axial and external magnetic field homogeneities of the detecting coils are analyzed in detail.

通过分析不同几何尺寸的线圈中轴线上磁场的变化情况，并借助直螺线管的径向和轴向公式，对轴外磁场均匀性进行了探讨。

A two dimensional model approach for the photodetachment dynamics of closed shell an-ionic systems in presence of external light field have been proposed in the context of polar environmental media.

利用外部光场，采用二维模型的方法研究了闭壳阴离子系统在极性溶剂环境介质中光解动力学过程。

Electrorheological technology is a new and marginal science, electrorheological fluid is a kind of smart material, with the control of external applied electric field, its coefficient of viscosity and shear yield stress can rapidly change, and this process is controllable, continuous, and reversible.

电流变技术是一门新兴的边缘科学，电流变液是一种智能材料，在外加电场的控制下，它的表观粘度和抗剪屈服应力可发生快速、可控、连续、可逆的变化。

If there is only one magnetic field, the result shows that shot noise of singlets and triplets oscillates with the external magnetic field and depend on the symmetric properties of the incident states.

只有一个磁场时，结果显示单态和三态的噪声随着外加磁场震荡，并且依赖一入射态空间部分的对称性。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。