查询词典 hexagonal

Using first-principles method, we have studied the structure transition of two-dimensional hexagonal boron nitride under large uniaxial strain.

采用第一性原理计算我们研究了二维六角氮化硼（2D h-BN）在单向大应变下的结构变化。

The electron displacement polarizabilities in the hexagonal boron nitride crystal are evaluated by the new model. The results are compared with those from the classical models to point out the applied scope of the new model.

根据该模型计算了六方氮化硼晶体的电子位移极化率，并与经典模型的计算结果进行了比较，进一步分析了所提出模型的适用范围。

Hexagonal boron nitride is isoelectronic and structural similar to graphite. But no intercalation compounds of hBN have been reported.

六方氮化硼与石墨是等电子且结构相似的，但六方氮化硼层间化合物却未见有报道。

The innovations in this investigation are as follows: 1. The cell boundary bands of hexagonal cells are observed by TEM on the anodic film formed in sulphuric solution, which is little reported in the literature.

利用TEM成功观察到形成于硫酸电解液的阳极氧化膜其胞状结构中胞壁带的存在，这在公开的文献中报道不多。

The outer skin of the boxfish consists of numerous bony, hexagonal plates which are interlinked to form a rigid suit of armour.

Boxfish 的外壳多骨，还含有众多能够连接在一起形成坚硬盔甲的六角盘以保证他们免受伤害，行动灵活。

The structure is formed by the assemblage of the second building units: cancrinite cage, according to the hexagonal space groups P63/mmc. It has not only the 18-ring pore channel system which parallels to the c-axis as in VPI-5, but also 10-ring pore channel system along both a and b-axis. The results obtained from calculating the bond distances and angles between the...

与VPI-5类似，具有平行于c方向的十八元环直孔道结构，但侧面有十元环孔道，通过计算该结构模型各原子间的键长、键角，认为该结构有可能存在，采用POWD-MODELING程序，计算了它的理论XRD谱图并绘制出其立体拓扑结构。

Utilizing the tools of conformal mapping and Cauchy integral formula and so on, the SIFs at the crack tips are obtained, which can be reduced to the known results under the condition of limitation; For the third and the fourth section, the problems of arc crack and parabolic crack are researched in one dimensional hexagonal QCs.

第二节研究了一维六方准晶狭长体中双半无限共线裂纹问题，利用保角变换以及Cauchy积分公式等工具求得了裂尖处的应力强度因子，在极限的情况下可以还原为若干已有的结果。

The influence on absorption coefficient brought from shape choice with cylindrical or cone-shaped cavity, square or hexagonal profile, from different closure as air or water, from different material properties and structure sizes, are analyzed based on the numerical calculations. Some general characteristics are summarized. It shows that lowest resonance frequency of sound absorbent coefficient is inversely proportional to volume of cavity and sound absorbent coefficient is proportional to perforated percentage.

2通过数值方法研究了吸声结构内腔为圆柱腔和圆锥腔、基材的剖面形状为正四边形和正六边形、不同背衬、基材材料特性、尺寸大小对整体吸声效果的影响，总结了这些情况下非旋转对称吸声结构的声学特性变化规律，得出腔体体积越大，吸声系数最低共振频率越低；穿孔率越大，吸声系数越大的结论。

Major equipment includes: J1VMC400 FANUC Oi-MB processing center Taiwan, Mpq-30 CNC punch one Taiwan, Amada ARZES255NT NC-1 Taiwan, Amada RG-100 CNC bending machine Taiwan, Amada RG-355 NC% 1 Taiwan-bending, high-precision CNC lathes 10, a universal tool grinder Taiwan, 2-line cutting, a planer Taiwan, 315 t and 500 of a hydraulic machine Taiwan, welder 5, It-315T Punch 25 Taiwan, the single hexagonal automatic lathes 10, 22 meters lathe Taiwan, cutting plate machine 5, with 1 Saw Taiwan, a Taiwan unmotivated mill, a plasma cutting machine Taiwan, three welding, riveting head of a Taiwan, 63 T Bending Machine 1 Taiwan, three carbon dioxide arc welding; otherwise ordinary lathe, tapping machine, drilling and other equipment several.

主要设备包括：J1VMC400 FANUC Oi-MB 加工中心1台、Mpq-30数控冲床1台、Amada ARZES255NT数控冲1台、Amada RG-100数控折弯机1台、Amada RG-355数控折弯机1台、高精度数控车床10台、万能工具磨床1台、线切割2台、刨床1台、315t及500液压机各1台、对焊机5台、It-315T冲床25台、单轴六角自动车床10台、仪表车床22台、剪板机5台、带锯床1台、无心磨1台、等离子切割机1台、氩弧焊3台、铆头机1台、63T折弯机1台、二氧化碳保护焊3台；另有普通车床、攻丝机、钻孔机等设备数台。

The pure screw dislocation is easily etched along the steps that the dislocation terminates. Consequently a small Ga-polar plane is formed to prevent further vertical etching,resulting in an etch pit shaped like an inverted truncated hexagonal pyramid at the terminal chiasma of two surface steps.

纯螺位错易于沿着由它结束的表面阶梯被腐蚀，形成一个小的Ga极性面以阻止进一步的纵向腐蚀，因而其腐蚀坑是位于两个表面阶梯交结处的截底倒六棱椎。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。