几何结构

A geometric structure representation of images based on the angle between spectral coefficient vectors of Laplacian graph was proposed. Graph clustering of spectral features was also investigated.

提出一种用拉普拉斯图的谱系数夹角谱特征来描述图像几何结构的方法，同时研究了基于图的谱聚类系统。

This means the most elegant and effective method of obtaining them is geometric construction.

这也意味着最文雅和有效的获得它们的方法就是几何结构。

So fractal theory can be used to analyse and study the geometrical structure of logging curves.

因此，可以利用分形理论来分析和研究测井曲线的几何结构。

First, we have to think about the geometry of our rectangle.

首先，我们不得不考虑我们的矩形的几何结构。

Therefore, it is necessary to study numerical methods which preserve the symplectic structure of the Hamiltonian system.

因此，研究保持哈密尔顿系统的辛几何结构特征的数值方法是必然的。

The helix geometry was presented as the primary example of this thesis.

本文将螺旋形几何结构作为主要的研究对象。

On the basis of optimized geometries,their electronic spectra were calculated according to INDO/SCI method.

以全自由度优化几何结构为基础，计算了各化合物的电子光谱。

First-principles plane-wave pseudopotential calculations were performed to study energetics , the geometry structures of intrinsic vacancies and interstitials on the anatase TiO2 (101) crystal surface.

采用平面波超软赝势方法计算了锐钛矿型TiO2(101)面存在本征空位和间隙点缺陷的几何结构以及缺陷形成能。

Results reveal that the spatial correlation properties of MIMO channel are dependent on the PAS, the antenna pattern and the geometric configuration of the array. When the PASs at the base station and the mobile station are independent, the spatial correlation matrix of the MIMO channel is the Kronecker product of the spatial correlation matrix at the BS and the MS. The temporal correlation properties of the MIMO channel are determined by the PAS at the MS, antenna pattern and the traveling speed of the MS. Based on the analysis of the physical essence, the temporal correlation properties are equivalent to the spatial correlation properties at the MS. The joint spatio-temporal correlation properties at the BS and the MS are quite different. When the PASs at the BS and the MS are independent, the spatial correlation at the BS is independent on the temporal correlation, but this is not true for the spatial correlation at the MS.

分析与计算的结果表明，MIMO信道的空间相关特性由角度谱、阵元的方向图、阵元间距以及阵列几何结构决定，并且当发射端与接收端的空间统计特性相互独立时，MIMO信道的空间相关矩阵可以表示为发射阵列空间相关矩阵与接收阵列空间相关矩阵的Kronecker乘积：信道的时间相关仅与MS端的角度谱、阵元方向图以及MS的运动速度有关，通过对信道时间相关的物理本质的研究，说明了时间相关与MS端空间相关的等价性；MIMO信道的空-时联合相关特性在BS端和MS端具有不同的特点，当发射端与接收端的空间统计特性相互独立时，BS端的空间相关与时间相关是独立的，而由于信道的时间相关与MS端的空间相关具有相同的物理本质，MS端的空间相关与时间相关不是独立的。

Secondly, a theoretical study of four lariat crown ethers, including one aza-15-crown-5 lariat ether and two aza-18-crown-6 lariat ethers, has been done using density functional theory with B3LYP/6-31G* method in order to obtain some parameters , such as E HOMO, E LUMO, and gap energy, etc.

其次，用密度泛函理论在B3LYP/6-31G*水平上对四个臂式冠醚分子进行了电子和几何结构优化计算。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。