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A "time-dependent relaxation" method is proposed to accurately implement given photospheric footpoint displacements and force-free conditions. The method is applied to analyzing the energy buildup of coronal magnetic fields, and the numerical results confirm the Aly conjecture (the magnetic energy of the force-free field is bounded above by the fully-open field energy), and extends it from fully-open to partially-open force-free fields.

提出计算无力磁场的"时变松弛"方法，能精确实现光球足点位移和无力条件；采用该方法分析日冕磁场的剪切储能，验证了Aly猜想（无力场磁能以全开放场磁能为上限），并将该猜想由全开放无力场推广至部分开放无力场。

In this paper, after the introduction of the basic concepts and the main results on K〓 theory, relative K〓 theory and the theory of classical groups of degree 2 which is related to K〓 theory, we study the problems of the computation of K〓 for the ring of integers of quadratic imaginary fields, examples of subrings of quadratic fields which are not universal for GE〓 and generating set of the Cokernel of the canonical homomorphism from K〓 to K〓.

本文在介绍了K〓理论和相对K〓理论以及与K〓理论有关的2阶典型群的基本概念及主要成果之后，对于虚二次域代数整环的K〓群的计算，非GE〓泛的虚二次域的子环以及K〓到K〓的自然同态的余核的生成元集等问题进行了研究。

From Poisson matrix, we can observe volume-preserving vector fields. By using Geiges-Gonzalo's existence of contact circle Theorem [3] , we show the existence of volume-preserving circle on3-manifolds which says that every3-manifold admits two linear independent vector fields preserving a same volume form.

通过Poisson矩阵可以观察出保积向量场，再利用Geiges-Gonzalo的接触圆存在性定理[3]，我们证明了保积圆的存在性：每个闭的3-流形上都存在两个处处线性无关的保积向量场并且它们的常系数线性组合仍是保积向量场。

Monthly geopotential height fields ; climatic and anomalous fields ; circulation index ; temporal and spatial structure ; difference between Northern and Southern Hemisphere

月平均位势高度场；气候场及异常场集；环流指数；时空结构；北、南半球差异

These methods have related to all of fields of AN science, and have got great effect in specific fields and states, but these all meet difficulties when processing huge quantity data with complex data type.

这些方法所涉及的领域几乎遍及人工智能科学的方方面面，而且在特定的领域中，特定的情形下取得了良好的效果。

In the works mentioned above, we take some coupled effects into account, including the coupling between the FGM structures and elastic media or compressible fluid, the coupling between mechanical and thermal fields and the coupling between mechanical and electric fields.

在上述工作中，本文考虑了多个耦合因素，包括结构与弹性介质的耦合、圆柱壳与流体的耦合；力场与温度场的耦合、力场与电场的耦合。

Based on the governing differential equations of the transient problem of temperature fields with phase change, the two-dimensional finite element formula of computing temperature fields around a buried pipeline in permafrost regions are achieved by using Galerkin's method.

根据相变瞬态温度场的控制微分方程，应用Galerkin法推导出计算温度场的二维有限元公式，对中国东北多年冻土区运行30年的加热输油管道土壤温度场进行了计算分析和比较。

The results from laboratory and fields showed that "beiao" baits has coefficient of select food and after put in fields half year,and has value in controlling rats compareing with anti cruor bait and naturalness.

结论初步研究证明，贝奥雄性不育剂具有良好的适口性，有实际应用价值，在肾综合征出血热地区应用半年后，与自然对照和常规的抗凝血杀鼠剂比较

The curtain wall of Burj Khalifa is equivalent to 17 football fields or 25 American football fields.

整个项目的幕墙的面积相当于17个足球场的大小或者25个美式足球场的大小。

We present linear codes over finite fields with Mannheim weight and prove that those codes can correct one error taken from a cyclic subgroup of the multiplicative group of finite fields, which provide an algebraic approach in coding modulation.

最后讨论了有限域上的Mannheim线性纠错码，证明了当错误取值于有限域乘群的一个循环子群时，面向多维信号的线性分组码可以纠单个错并为码调制提供了一种代数渐进方法。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。