四维的

Two-dimensional "different dollar" and "four-color conjecture"(5)- Mathematics - Mathematical Physics Mechanics World Health ...

二维的"相异元数"与"四色猜想"-数学-数学物理力学天地生。。。

In these experiments initial data and model error parameter are adjusted simultaneously or sequentially as control variables.

正是由于认识到这一点，Derber［1］首先提出用修正模式的方法来替代修正初始场进行变分四维同化。

This is one of a series of glass Klein bottles made by Alan Bennett in Bedford, United Kingdom for the Science Museum, London. It consists of three Klein bottles, one inside another. A Klein bottle is a surface which has no edges, no outside or inside and cannot properly be constructed in three dimensions.

其实除了用玻璃吹制，如果我们把两条莫比乌斯带沿着它们唯一的边粘合起来，也可得到了一个克莱因瓶（当然不要忘了，我们必须在四维空间中才能真正有可能完成这个粘合，否则的话就不得不把纸撕破一点）。

In this study, Atmospheric Research Model (MM5) and Four-dimensional data assimilation was used to simulate the land and sea breeze circulation over the Pearl River Delta Region.

利用中尺度数值模式MM5和四维同化技术相结合对珠三角地区的海陆风过程进行了模拟。

The authors have for the first time come up with the conception of a unitsection separate node point heat resistance and heat capacity four dimensional heat network for a solar energy collector system and on this basis set up a heat collection process dynamic emulation model for the solar energy collector system with a cavity absorber trough paraboloidal mirror.

在首次提出太阳能集热器系统单元段分节点热阻、热容网络——四维热网络概念基础上，建立腔体式吸收器——槽形抛物镜太阳能集热器系统的集热过程动态仿真模型。

The French are at Vitebsk, in four days' march they may be at Smolensk; perhaps they are there by now.

"法军到了维捷布斯克，再过四昼夜的行程，他们就可能到斯摩棱斯克了；也许他们已经到那里了。"

If you've heard of a tesseract cube, you may begin to understand.

如果你曾听说过超正方体，那么对四维空间也应该有了基本的概念。

Thus, only spatial components of the four-dimensional vector potential are needed to be considered in our work.

这样，只有胶子场四维矢势的空间分量需要考虑。

4D geologic model has been widely applied to analyses of palaeostructure,palaeogeomorphology and depositional setting.

目前四维地质模型广泛应用了古构造、古地貌和沉积环境的分析中。

Moreover, it is generally insensitive to the overestimates of the component number chosen.

结果显示，这两种四维算法都能在定量分析上获得满意的结果。

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。