查询词典 arc

The short circuiting transfer pulses in the CO_2 arc welding have a great interference to the signals processing of the arc sensor.

CO2气体保护焊的短路过渡脉冲对电弧传感器信号处理存在较大的干扰。

The effect of the arc-ultrasonic irradiation on the adhesion coaling was investigated by keeping the ultrasonic frequency constant and changing the voltage, using the coating prepared in the absence of the arc-ultrasonic irradiation as a reference.

喷涂过程中保证超声激励频率不变，改变超声激励电压，并与不加超声进行对比，研究了其对涂层结合强度的影响。

The unsuitable potential of the constricting nozzle is the essential reason of arc interference and double arc.

不利的喷嘴电位干扰是产生主电弧与维弧相互干涉和双弧的根本原因。

For Southwestern Margin of Aqikekule Lake ophiolite, their field geological, petrological, minerological, petrochemical and geochemical characteristics show that:① it outcropped as tectonic slices along the near west-to-east strike Kunzhong fault and is composed of metamorphic perodotties, cumulates and volcanic rocks, in which, chromites are distributed in the upper part of metamorphic peridotites as pods, or in the lower part of cumulates as near-strata;② metamorphic peridotites include serpentinites, chromite-bearing serpentinites, chlorite-epidote schists and chromitites, of which, chromitites have nodular and orbicular structure, and cumulates include pyroxenits, serpentinites, chromite-bearing serpentinites, chromites and metamorphically mafic rocks and only basalts are seen in volcanic rocks;③ Cr# of chromites suggest that they formed in the SSZ and Al〓O〓 and TiO〓 of metamorphic peridotites also suggest SSZ environment;④ metamorphic peridotites have V type and enriched LREE patterns, cumulates have from strongly depleted LREE, flat REE to enriched LREE patterns with universally striking positive Eu anomalies and basalts show flat REE or slight enriched LREE patterns with no Eu anomalies;⑤ trace element and Sm-Nd isotope characteristics of metamorphic peridotites imply their strikingly heterogeneous mantle character ε〓(t+4.39～+26.20 and later Nb, Ta fertilization;⑥ trace element characteristics of basalts and their tectonic diagrams show they probably formed in the rifted island arc or back-arc basin environment.

对阿其克库勒湖西南缘蛇绿岩，野外地质、岩石学、矿物学、岩石化学以及地球化学等特征表明：①该蛇绿岩以近东西向、沿昆中断裂呈构造岩片出露，由变质橄榄岩、堆晶岩和火山岩三个单元组成，其中见铬铁岩呈豆荚状产于变质橄榄岩的上部，或呈似层状产于堆晶岩的下部；②变质橄榄岩包括蛇纹岩、含铬铁矿蛇纹岩、绿帘绿泥片岩和铬铁岩等类型，其中，豆荚状铬铁矿具有结核状构造和球状构造，堆晶岩包括辉石岩、蛇纹岩、含铬铁矿蛇纹岩、铬铁岩和变质基性岩等类型，火山岩仅见玄武岩；③铬铁矿的Cr#表明其形成在俯冲带，变质橄榄岩的Al〓O〓和TiO〓成分也指示了SSZ环境；④变质橄榄岩的稀土配分型式见V型和LREE富集型两种型式，堆晶岩表现出从LREE强烈亏损、REE平坦分布到LREE富集的配分特征，并且普遍具有醒目的正Eu异常，玄武岩的稀土配分型式表现为平坦型或LREE略富集，无Eu异常；⑤变质橄榄岩的微量元素及Sm-Nd同位素特征指示了其地幔的显著不均一性ε〓(t为+4.39～+26.20以及Nb、Ta在后期的富集；⑥玄武岩的微量元素特征及构造图解表明其可能形成在裂谷岛弧或不成熟的弧后盆地环境。

According to the diagrams of AlZ-TiO2, Wo-En-Fs and An-Mg′, the amphibole gabbros are suggested to be generated at an island arc and the olive gabbros are formed in a back-arc basin setting.

根据AlZ-TiO2、Wo-En-Fs以及An-Mg′图解，结合其微量元素地球化学特征可以判断角闪辉长岩类形成于岛弧环境，橄榄辉长岩产于弧后盆地环境。

Some technical problems arose during the debugging of the accelerator. The ion source did not produce arc. The accelerator tube cracked. The control system was out of order. The transporting capacity of the charge belt degraded. The corresponding reasons were analyzed and some measures were adopted to solve the problems. The drawing voltage was raised to its predetermined position after the ion source produced arc and should be reduced to zero before turning off the accelerator. Transition flange was lathed and the accelerator tube was re-assembled. The control equipment at high voltage was shielded. TVS diodes were installed at the input and output ends.

调试中出现了离子源不起弧、加速管破裂、控制系统失灵和输电带输电能力降低等技术问题，分析了出现这些问题的原因，然后分别采取了相应的措施加以解决：变换工作流程，在每次关机前先把引出电压降为零，开机时等离子源起弧后再把引出电压升到预定值；对过渡法兰进行车加工，重新封装；对高压端的控制设备采取屏蔽措施，在输入、输出端使用TVS二极管，对控制软件进行抗干扰设计；对绝缘气体进行循环干燥等。

In this thesis, the load current arc conditioning effect on the postarc restrikes has been investigated by using a synthetic circuit, experiments show that the restrikes can be decreased by using arc conditioning process with polarity effect.

本文在合成回路上研究了负载电流电弧的老炼作用，发现负载电流电弧老炼可以明显地降低弧后延时重击穿率，这种老炼具有极性效应。

While using this testing system to observe arc moving in the limiter, it was found that the local restriking near the entrance to iron chute was the cause of arc voltage drop.

利用该测试系统，在研究限流器中电弧运动过程时发现，存在于栅片入口附近空间的局部重击穿现象，是导致分断过程中电弧电压跌落的重要原因。

During arc-continent collision, protoliths of eclogites were scratched off from oceanic island-arc and oceanic islands and carried downwards by subducting continental slab.

锡铁山地区的部分样品中存在重稀土的异常富集，可能指示了原岩部分熔融过程的存在。

From about 206 Ma there occurred arc-continent collision accompanied by compressional contraction and shearing deformation of the arc crust and development of syn-collision granites. In the late Yanshanian epoch (138-73 Ma) post-orogenic extension came into action and resulted in the generation of A-type granites. During the Himalayan (65-15 Ma) intra-continental orogenic movement a large-scale strike-slip thrusting induced the intrusion of granites and development of pull-apart basins.

据此，再造了造山带的形成过程与演化历史：印支期的大规模俯冲造山作用(238～210 Ma)，形成义敦火山岩浆弧；大约自206 Ma始，发生弧-陆碰撞，伴随岛弧地壳挤压收缩和剪切变形，发育同碰撞花岗岩；进入燕山晚期(138～73 Ma)，岛弧碰撞造山带发生造山后伸展作用，形成A型花岗岩带；喜马拉雅期发生陆内造山作用(65～15 Ma)，岛弧碰撞造山带出现逆冲-推覆和大规模走滑平移，伴随喜马拉雅期花岗岩的侵位和拉分盆地的形成。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷