查询词典 trefoil knot

The characteristic of a trefoil knot is: three independent faces becoming a linked closed curve, or single side curve.

该展品是拓扑研究的课题之一，具有单侧曲面特征。

One end of the band spins 120 degrees, takes three turns and connects with the other end, which forms a model of a single side curve of a trefoil knot.

由原来相互独立的三个面变为一个连通的闭和曲面。

The broad symbolic significance of the trefoil knot is: science has no national boundary; interdisciplinary study has no boundary; science requires communication among countries; science and art are closely linked.

三叶纽结的广义象征意义是：科学没有国界，各学科之间没有边界，科学是相互连通的，科学与艺术是相互连通的。

The Trefoil knot, a main exhibit in the middle of the hall, is 10 meters wide, 12 meters high, with bandwidth of 1.65 meters. It is made from triangular prism band.

三叶纽结整体宽度10米，高12米，带宽1.65米，是由一条三棱柱带经过三次盘绕，将其中一端旋转120度后首尾相接，由此构成三面连通的单侧单边三叶纽结造型。

The C30 carbyne trefoil knot studied is intertwined by the sp hybridized15 chain, which is topologically chiral and belongs to D 3 point-group of symmetry.

三叶结分子是最简单的非平凡纽结分子， C30卡宾三叶结分子是由一条闭合的15 sp杂化碳链组成的，是具有 D 3对称性的拓扑手性分子。

Furthermore, the tied trefoil knot has less conjugation property and Jahn-Teller effect but higher total energy than the cyclo-C30 carbyne, that is, the process of "tied" could increase the energy of molecules.

因此，分子打结是一个能量升高的过程。

The trefoil is known as the simplest nontrivial molecular knot. The C30 carbyne trefoil knot studied is intertwined by the sp hybridized15 chain, which is topologically chiral and belongs to D3 point-group of symmetry.

三叶结分子是最简单的非平凡纽结分子，C30卡宾三叶结分子是由一条闭合的l5 sp杂化碳链组成的，是具有D3对称性的拓扑手性分子。

Density functional theory calculations have been carried on the molecular knot at the RB3LYP/6-31G levels. Based on the optimized geometry, the vibrational spectra, natural bond orbital and orbital energy level analysis for C30 carbyne trefoil knot have been calculated at the same level, and compared with the cyclo-C30 carbyne molecule.

本文用密度泛函方法[DFT/RB3LYP/6-31G]对分子结构和光谱性质进行了研究，在优化构型的基础上通过自然键轨道方法和轨道能级研究了它的共轭性、成键情况和稳定性，并与平面型C30卡宾环分子进行了比较。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。