乙炔

In this work, the horizontally oriented single-walled carbon nanotubes networks deposited directly on Si wafer substrate by the buffer layer-assisted microwave plasma chemical vapor deposition method were successfully developed, using CH4, C2H2 and H2 as the source gases, and Fe and Nias catalyst materials.

本研究利用缓冲层材料辅助微波电浆化学气相沉积法，以甲烷(CH4)、乙炔(C2H2)与氢气(H2)为反应气体，镍与铁为触媒，成功地开发出在矽晶片上直接合成水平方向网状单壁碳奈米管。

The results indicate that:① Soot records is one of direct and effective means;② Overdriven detonation appears only once and several blasts appear in DDT (Deflagration to detonation transition);③ The dimension of acetylene is less than that of hydrogen under the same initial condition.

试验结果表明：①烟迹法是研究DDT更为直接和有效的手段之一；②在本试验条件下，观察到DDT过程中过爆只会出现一次，但从过爆衰减至正常C-J爆震波的过程中存在多次多点爆炸的迹象；③初始条件相同的情况下，乙炔的胞格尺寸小于氢气的胞格尺寸。

Steel gas mains by electric arc, oxy- acetylene flame, or other welding

结构钢材焊接工以电弧、氧乙炔焰或其他焊接工序，割或焊接结构钢材，包括

New hyperbranched polymers containing triphenylamine were synthesized by polycyclotrimerization of bis(4-ethynylphenyl)phenylamine and 1-octyne with dicarbonyl- cyclopentadienyl-cobalt CpCo(CO2 as catalyst under ultraviolet irradiation.

在以CpCo2为催化剂和紫外光照射的条件下，以二-(4-乙炔苯基)-苯胺和1-辛炔为单体合成了新型的含三苯胺超支化聚合物。

Keywords hyperbranched polymer;triphenylamine;bis（4-ethynylphenyl）phenylamine;1-octyne;[2+2+2] cyclotrimerization;dicarbonyl-cyclopentadienyl-cobalt catalyst;fluorescence quantum yields

超支化聚合物；三苯胺；二-（4-乙炔苯基）-苯胺； 1-辛炔； [2+2+2]环三聚；二羰基茂钴催化剂；荧光量子效率

In this paper,three kinds of conductive adhesives were developed by using polyvinylidene fluoride as binding materials and carbon nanotubes graphite and carbon black acetylene as conductive fillers.

采用涂膜法制备了以碳纳米管、乙炔黑和石墨粉为导电填料的导电胶，研究了它们的电学性能、力学性能和粘结性能。结果显示，聚偏氟乙烯/CNTS导电胶有较好的综合性能

The main objective of this research project is to modify the Methyl-Acetylene/propadiene selective hydrogenation reaction system of the No.3 Naphtha Cracker in CPC. The original gas phase reaction system was redesigned to a liquid phase reaction so that higher propylene selectivity was achieved and lower rates of propane and green oil were produced. To recover effectively the higher production of valuable propylene from the reaction system, the following fractionator was also redesigned.

本研究之目的在於修改中油公司三轻工场老旧的甲基乙炔／丙二烯选择性氢化气相反应系统，使成为液相反应系统，藉由液相反应的优异性，提高由MAPD氢化得到丙烯之选择率，同时降低丙烷及绿油产率，以增加丙烯产率，另亦修改丙烯精馏系统，以提升蒸馏塔提纯之效率。

There are two parts of work in this thesis. One is to simulate intelligent PID control method based on the poloidal field power supply system of TOKMAK, the other is to design and commission the power supply control system of the equipment for producing acetylene from coal pyrogenation by hydrogen plasma.

本文主要包括两部分内容，一是基于托卡马克装置极向场电源的控制仿真研究了智能PID 控制方法，二是氢等离子体裂解煤制乙炔电源控制系统的设计和实验调试。

About 70 years ago, towards the end of 1938 and at the start of 1939 to be exact, the chemist Walter Reppe, working in a BASF laboratory in Ludwigshafen, used acetylene and pyrrolidone to produce a new monomer called vinylpyrrolidone, which in turn can be transformed into the polymer polyvinylpyrrolidone.

大约70年前，对1938年底和1939年开始的，确切地说，是化学家沃尔特雷佩，在路德维希港的巴斯夫在实验室使用的乙炔和吡咯烷酮产生新的单体，工作称为乙烯基，这反过来又可以转化为聚合物聚乙烯吡咯烷酮。

It is important to prevent acetylene gas from collecting in a confined area because the gas may reignite and explode.

防止乙炔气体在狭窄空间内积聚是很重要的，因为气体可能重新起火和爆炸。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。