四维的

Considering that the model is traditionally supposed to be exact and only initial data fields are amended in Adjoint Assimilation System.

鉴于传统的四维资料伴随模式同化系统都是假设模式完全正确仅对初始场进行修正。

Tangent linear and adjoint method of "on-off " switches are studied in this paper.

本文研究了四维变分资料同化中有关"开关"变量的切向线性化和伴随问题。

New data types (converted-wave data, 4D data, azimuthal AVO analysis,shear-wave data).

新的数据类型（转换波数据，四维数据，方位AVO分析，横波数据

It firstly parses the CESS value creation system through the analysis of four dimensions in the CESS value creation model.

文章先以CESS价值创造模型为基础，通过对此模型的四维分析，解构CESS价值创造体系。

NavInfo pedestrian navigation electronic map data covering the city will be expanding over the next few years.

四维图新行人导航电子地图数据覆盖的城市将在未来几年内不断扩展。

They are all there, and you will not function in all four dimensions.

他们都在那儿，并且你也不是所有的在四维意识中运作。

So when we felt another kind of tetra-dimensional, extreme, music-like art made up of colors and lines in Malevich and Tatlin's experiment in the early of last century, people had to get used to the visional format from Kandinsky, Pollock, Mondrian and Roscoe. The brand-new artistic experiment is further rooted into experience of our religion, music, philosophy, life and other staffs not only from format to content, but also from theory to techniques. And the traditional plane paintings are used to annotate the art meaning of non-representation. But Chinese are unwilling. It is only the format product of powerful culture in expanding, rather that there are lots of differences between the western abstract and oriental "image".

所以当我们从上个世纪初在马列维奇、塔特林的实验中，体验到一种被称为四度的、极致的、音乐似的、或者说将色彩和线编制成为另一种艺术自由的端倪时，人们就不得不习惯由康定斯基、波洛克、蒙德里安和罗斯科所带给我们的视觉图式，它们从形式到内容、从理论到技巧，无不变本加厉地把这种全新的艺术实验根植于我们对宗教、音乐、哲学、生活以及诸多问题的体验中，并用传统的二维平面绘画来诠释出非具象的艺术意义，不过这些对中国人来说，很可能是不情愿的，它只是强势文化在扩张中的样式产物，更何况这些西方式的抽象与东方式的"意象"仍然有着极大的差异。

In the fifth chapter,we study dipolarizations in some quadratic Lie algebras.Inthe first section,we obtain some results on the classification of dipolarizations in gen-eral quadratic Lie algebras,and prove that there exist dipolarizations in the solvablequadratic Lie algebras whose Cartan subalgebras consist of semisimple elements.

第五章讨论了某些二次李代数的双极化，在第一节中，我们给出了二次李代数的双极化的一些分类结果；特别证明Cartan子代数是由半单元组成的二次李代数上存在双极化，第二节确定了四维扩张Heisenberg代数的所有双极化，在第三节中，我们构造了2n+2维扩张Heisenberg代数的六类双极化，我们发现两个不同于半单李代数情形的有趣事实：（1）在扩张Heisenberg代数上同时存在对称和非对称双极化；（2）对应于扩张Heisenberg代数的双极化的特征元有的是半单的有的是幂零的。

The development of animation as the progress of mankind in the new century painting of the logo, the inheritance of human culture and biological organism also update it regularly, the human imagination as an extension of time and space changes, the modern design gradually from 2D to 3D and 4D (that is, We often hear the two-dimensional space, three-dimensional space, four-dimensional space) space extension of the art of color design and science and technology as we show a wealth of space symbol, is also given to the human meaning of a new life.

动画片的发展作为新世纪人类绘画进步的标志，人类文化的继承也和生物机体的不断更新有关，人的想象随着时空的变化而延伸，现代设计也逐步从2D到3D和4D（也就是我们常听到的二维空间、三维空间、四维空间）空间延伸，色彩设计中的艺术化和科技化为我们展现了丰富的空间符号，也赋予人类新的生活内涵。

With FDDA method, the precipitation echo reflectivity field gained by observation and three dimension wind field as well as other parameters obtained by retrieval are put into the usual mesoscale or smallscale numerical model, so that the inner structure of mesoscale or smallscale weather system is better researched and precipitation is estimated more exactly.

2利用四维同化方法，将单多普勒天气雷达观测得到的降水回波的反射率场以及用反演技术得到的三维风场及其它变量，加入到通用的中小尺度数值模式中，以便更好地研究中小尺度天气系统的内部结构，预测其演变，并提供更精确的降水估计。

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。