查询词典 tetrahedron

The changes of silicate tetrahedron of fly ash in the process of mechanical grinding were analyzed by trimetheylsilicane.

采用三甲基硅烷化分析技术，研究了粉煤灰机械研磨过程中硅氧四面体结构的变化趋势。

But it is not an easy task to directly extend the linear triangle geometric inequality to the n-simplex, thus there are many geometric inequalities worthing exploring and researching when we extend the linear geometric inequality to the tetrahedron and the n-simplex.

而三角形中的某些线性几何不等式直接推广到维单形并不是一件容易的事，因而在推广到四面体中乃至维单形时还有许多几何不等式值得探讨和研究。

An easy task to directly extend the linear triangle geometric inequality to the n-simplex, thus there are many geometric inequalities worthing exploring and researching when we extend the linear geometric inequality to the tetrahedron and the n-simplex.

而三角形中的某些线性几何不等式直接推广到维单形并不是一件容易的事，因而在推广到四面体中乃至维单形时还有许多几何不等式值得探讨和研究。

To satisfy the requirement of different users, a three-phase four-leg circuit topology inverter is investigated to balance output voltage. The transfer functions and system transfer functions matrix are deduced. Three-dimensional space voltage vector modulation strategy is analyzed. The triangular prism judgment, the tetrahedron discrimination and computational methods of space vector action time are discussed.

推导了三相四桥臂逆变器的传递函数，建立了系统传递函数矩阵；分析了三维空间电压矢量调制策略，给出了三棱柱判断、四面体的区分、各个空间矢量作用时间的计算方法，并进行了仿真和实验研究。

Physicists at New York University and Virginia Tech have carried out a series of experiments and, among all the shapes they have tested so far, the tetrahedron (a pyramid with four triangular sides) takes some beating.

纽约大学和佛吉尼亚理工大学的物理学家进行了一系列的实验，在他们到目前所测试的形状中，四面体优势明显。

As an analogy, we might say that our trichromatic color vision can be represented in a triangle, whereas their tetrachromatic color vision requires an additional dimension, giving a tetrahedron or triangular pyramid.

让我们做个类比，如果用一个三角形来代表人类的三色色觉，那麽鸟类的四色色觉就需要多一个空间维度来代表，得到的就是四面体或三角锥体。

There is an allotropic change temperature (1155K) for pure Ti and it is a hydrogen-absorbing metal for different solubility in a-phase titanium and 3-phase titanium. The hydrogen atom dissolves in lattice and occupies tetrahedron interstitial position, and then forms TiH2 sublattice of face-centered cubic.

钛是－种具有同素异型转变点T(1155K)的吸氢金属，氢在α钛和β钛中有不同的溶解度，在T以下易形成具有面心立方晶格结构的TiH2，氢原子溶解在晶格中，占据四面体间隙位。

Binuclear dimmer and tetrahedron of Zn and Yb〓O〓 cubane assembled by hydrogen bond structures were obtained.

上述配合物分别具有双核二聚体结构以及氢键组装的Zn四面体和Yb〓O〓立方烷结构。

The study of structure shows that the noncrystalline network is composed of [PO_4] tetrahedron and [VO_5] trigoral bipyramid.

结构研究表明[PO_4]四面体及[VO_5]三角双锥体共同构成非晶态的网络骨架。

In the 2a1 state of Ga3P2 ,the singly-occupied 5a1 orbital is made of Ga1....................on the other hand ,the 2b1 HOMO of the 2B1 state of the edge-capped tetrahedron consists of P1............................,where the P orbitals and Ga orbital make a significantly enhanced contribution .thus , while Ga orbitals make significant contributions to the 1A1 state with the distorted trigonal bipyramidal structure ,the P orbitals contribute significantly to the open shell MOs of the two structures.

另一方面在Ga3P2 2a1状态，被唯一占领的5a1轨道由Ga1做成。。。。。。。。。。。。。。。。。。。。，边缘加盖的四面体的2B1状态的2b1拉人包括P1 。。。。。。。。。。。。。。。。。。。。。。。。。。。。， P轨道和Ga轨道做显著改进的贡献。thus，而Ga轨道做对1A1状态的重大摊缴与被变形的三角bipyramidal结构的地方， P轨道对二个结构的开放壳MOs极大贡献。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。