查询词典 sloping fields

Second, based on the spherical vector wave function in uniaxial anisotropic medium, and the first, second, third and fourth spherical Bessel functions satisfy the same differential equation and recursive formula. The scattering fields in terms of spherical vector wave function from a uniaxial anisotropic spherical shell and an anisotropic uniaxial-coated conducting sphere by a plane wave are derived. The electromagnetic fields in uniaxial anisotropic medium and free space can be expressed in terms of spherical vector wave functions in uniaxial anisotropic media and isotropic medium.

二、在建立均匀各向异性单轴介质球矢量波函数理论的基础上，利用二阶线性偏微分方程的性质和第一、第二、第三和第四类球Bessel函数满足相同的微分方程和递推关系，我们分别研究了单轴介质球壳和单轴介质涂覆导体球对平面波的电磁散射特性，首先给出了各个区域的电磁场用球矢量波函数来表示的解析表达式，进而利用电磁场在边界上满足电磁场切向连续的边界条件和球谐函数的正交性，得出了各向异性单轴介质球结构中电磁场用球矢量波函数表示的系数所满足的矩阵方程。

In order to study the transitions between quarks, we integrate out the effective antiquark fields and get a form of effective Lagrangian in terms of effective quark fields.

为方便描述正夸克间的跃迁过程，将上一步得到的有效拉氏量中有效反夸克场积分出去，从而在拉氏量中仅明显包含有效正夸克场。

ABSTRACT The studies of micro robots have board application fields and social dements. Micro robots can be used in biomedicine, aeronautics and astronautics, national defence, industry, agriculture and family fields.

微机器人的研究有着广泛的应用前景和社会需求，微机器人可应用于生物医学、航空航天、国防、工业、农业及家庭等领域。

There has been various large-scale dredgers used for broad rivers, and the technique is already very mature, but producing such a dredger costs more than ten millions. In addition, they can only be applied to large-scale fields. it's incapable for narrower fields, such as pools and ditches in suburbs, the corners of dike and so on.

世界上已有的用于大型江河湖泊清淤的各种不同的挖泥船技术已经相当成熟，但制造这样一艘挖泥船所需成本高达上千万，而且它只能应用于作用面积极大的场合，对于水域狭窄的郊区、农村的沟渠、池塘和溪流以及堤岸死角等处的清淤就爱莫能助了。

Based on the basic law of electrostatics and the boundary-value problems of Poisson equation, two opposite thoughts of the study that electrets can either be designed to provide homogeneous electric fields or be designed to shield electric fields are discussed.

利用驻极体具有的可任意切割、拼装、黏接的特性，从静电学的基本规律及由泊松方程构成的静电边值问题出发，对驻极体既可对外提供电场又可设计为屏蔽电场的 2个相异思维的研究结果展开了讨论，从而，从理论上指出驻极体既可以制成提供均匀外场的材料又可以制成一种透气性静电屏蔽材料。

With the development of electrical technology, the possible health hazard of exposure to ELF fields has become an issue of considerable public concern, particularly, the association between exposure to ELF fields and the risk of cancers.

随着电力事业的发展和家用电器的日益普及，极低频电磁场的健康危害已经引起公众的广泛关注，尤其是极低频电磁场暴露与肿瘤的危险度关系。

Huangqiao carbon dioxide gas field in North Jiangsu Basin have the following characteristics: deep gas fields are associated with shallow ones, marine gas fields are coupled with continental ones, and several gas reservoirs are combined. Carbon dioxide in Huangqiao area mainly comes from deep mantle, mixed with a little thermal metamorphism and a little organic carbon dioxide in shallow formation, and helium and nitrogen gas mainly come from mantle. There is a good time\|space matching relationship between carbon dioxide gas reservoirs and great rifts, magma and volcano activity, which forms the special carbon dioxide gas reservoir mode for Huangqiao. This mode has good sealing, trapping and preserving conditions, but its gas source differs from traditional hydrocarbon gas reservoirs.

苏北盆地黄桥CO2气田具有深部气田与浅部气田、海相气田与陆相气田匹配组合互成一体、多个气藏组合分布的特点，其CO2主要以深部幔源成因为主，浅层混有部分热变质成因和少量有机成因CO2，氦气和氮气主要为幔源成因，而且，黄桥地区CO2气藏的发育与深大断裂和岩浆火山活动具有很好的时空配置关系，形成了独特的&黄桥式&CO2气成藏模式，并具备良好的储盖圈保条件。

In view of the practice of efficient development of the gas fields in east Sichuan——the largest natural gas-producing base in China at present by applying advanced techniques and scientifically managing method s, this paper summarizes and generalizes a set of development programs and managing method s for the gas fields through analyzing.

本文针对目前全国最大的天然气生产基地—川东气田，运用先进技术和科学管理手段高效开发的实践，总结并分析概括出了一套气田开发程序和管理方法。

On the basis of summarizing the status quotation of related researches at home and abroad, problems in related researches and studies are analyzed and the important research fields and contents in marsh sedimentology are chosen:Establishing different model of marsh sedimentation, to support marsh definition and classification from sedimentology; Advancing theory and quantification, to analyze formation process of marsh from quality to quantity methods; Applying modern sampling system and setting up standard sedimentation profiles; Strengthening the research of gleying marsh inland and its recent process and evidence derived from sedimentation profile; Enlarging geography fields and comparing between spatial and temporal research, and enforcing regional short timescale and highresolution environmental change; Paying much more attention on correlations between watershed environment and information derived from marsh sedimentary records and especially on their controlling mechanism.

主要从学术文献、权威机关与科研机构两个方面对相关的国内外研究现状和进展进行总结，针对国内外研究现状和存在的问题提出了今后研究的重点：建立不同成因的沼泽沉积环境模式，从沉积学角度对沼泽定义及分类提供支撑；注重理论提升与定量化，使沼泽形成过程分析从定性描述走向定量化；注重现代化采样系统的应用与标准沉积剖面的建立；加强内陆潜育沼泽研究，注重现代过程与沉积剖面证据；扩大地理覆盖面，加强时空对比，加强沼泽区域性短尺度、高分辨率环境演化研究；深化沼泽沉积信息与流域环境变迁耦合机制研究。

The fields of the Royal Plantations reached outward beyond the forest and, when the sun lifted over the far curve of land, it beamed glowing gold across grain rippling in the fields.

皇家种植园的田野延伸至森林外，当太阳在远处曲折的大地上升起时，它发出金色光泽，照耀着田野中的谷浪。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。