查询词典 electric arc process

According to spectral characteristics of the HCVAW arc in a body, energy factor which value equals to the ratio of two spectral lines' intensity, was defined.When τ's value was less than 0.1, the HCVAW arc was exhibitive of diffusedshape with lower energy density instinct; and when τ's value was higher than 0.5,the arc was a fine-constricted arc with higher energy density.

从积聚态电弧的谱线空间分布来看，阳极材料为水冷铜板时，自空心阴极端面到阳极工件，氩原子谱线相对辐射强度具有比氩一次离子谱线相对辐射强度更快的减弱趋势，最大辐射强度均出现在距空心阴极端面2mm左右的位置。

The characteristic of primary arc is analyzed, and the dynamic model of primary arc is established. The line differential equation including primary arc voltage is constructed, and the parameter estimation technique is used to estimate the voltage amplitude of primary arc, so as to determine the fault type and realize adaptive three-pole-autoreclosure.

分析了一次电弧的特点，建立了一次电弧的动态模型，利用一次电弧的特点建立了包含电弧电压的超高压输电线路相间短路的线路微分方程，通过参数估计的方法求得故障点的电弧电压，以判断故障类型，实现自适应三相重合闸。

In the proposed formulation, the fluid jump arc of Second order Fluid Stochastic Petri nets, which takes deterministic jump height, is introduced for the sake of modeling impulse rewards. In order to model non-Markovian stochastic systems, the fluid jump arc is combined with the flush-out arc. As a result the fluid jump arc as a modeling primitive has the function of emptying in zero time the existing fluid from the continuous place connected with it.

为方便利用该机制建模冲量回报，引入二阶流体随机 Petri 网中的流体跳跃弧，跳跃弧的跳跃高度取确定值；为方便建模非马尔科夫随机系统，将清空弧与流体跳跃弧结合，使得流体跳跃弧作为建模原语直接具有瞬间内清空与之相联接的连续库所的功能。

Plasma cutting machine work, the first plasma arc ignition by high-frequency oscillator excited between the electrode and the inner wall of the gas nozzle, resulting in high-frequency discharge, the gas ionization and the formation of local small arc, this small arc by the compressed air role, from the nozzle to ignite plasmon in the arc, spark generator, which is the main task.

等离子切割机工作时，首先要引燃等离子弧，由高频振荡器激发电极与喷嘴内壁之间的气体，产生高频放电，使气体局部电离而形成小弧，这一小弧受压缩空气的作用，从喷嘴喷出以引燃等离于弧，这是火花发生器主要的任务。

Through the comparative analysis that: the arc-tooth flow of hydraulic performance is better than the arc, Adopting optimize the design parameters of the structure, reducing the flow rate of 0 regions, and strengthen vortices regions, improved irrigation arc tooth for hydraulic performance and anticlogging ability, irrigation design recommended by arc-tooth flow structure.

通过对比分析认为：弧齿形流道水力性能优于弧形流道，可以通过结构参数优化设计，减小0流速区域，强化旋涡区，提高弧齿形灌水器的水力性能与扰堵塞能力，灌水器设计中推荐采用弧齿形流道结构形式。

Based on the results of the experiments, analyzing arc reignition probability and stagnation time of each arc-quenching chamber, a new type arc-quenching chamber with splitter plates, which holds stronger ability of arc quenching compared with the old ones, is designed.

分析了每种灭弧室的电弧重燃几率及电弧停滞时间等性能参数，基于试验的结果，设计了一种灭弧性能明显优于原灭弧室的新型栅片灭弧结构。

Through testing practically and calculating theoretically, this paper has evaluated generally the energy consumption of the SCR arc welding power source?the DC arc welding generator and the inverter arc welding power source for manual arc welding machine used in production.

通过实际测试与理论计算，对晶闸管整流电源弧焊机、直流弧焊发电机和逆变电源弧焊机等生产中常用的焊条电弧焊焊机的耗电量情况进行了综合评价。

It can be concluded from the above experiment results that for the auxiliaryheated arc plasma generator, an area which has uniform temperature distribution andhigher temperature. In this area, the diameter of the key arc root increases and thiscondition is beneficial to reduce the cathode erosion. At the same time, it is animportant segment for the secondary arc to rotate on the cathode surface and to heatthe surface for the auxiliary heated arc plasma generator.

总结上面的实验结果可以看出：在辅助加热电弧等离子体发生器中，利用辅助电弧对阴极表面的加热作用，能够在阴极表面形成一个温度较高且分布均匀的区域；在温度较高的区域内，主弧弧根直径增大，这种情形有利于减小阴极烧损；同时，辅助电弧旋转加热阴极表面是辅助加热电弧等离子体发生器的一个重要环节。

In order to avoid or reduce arc fault hazard,the authors established an arc fault detecting test system with the method of power spectral analysis to study the early acoustic characteristics of fault arc ,and extracted the sound signature of early fault arc by using power spectrum analysis.

为了避免或减少故障电弧的危害，笔者建立了故障电弧探测试验系统，采用功率谱分析的方法对故障电弧的早期弧声特性进行了试验研究，提取出故障电弧的早期弧声特征信息。

Results of experiments under different conditions show that, compared with arc electrical signal and arc light signal, arc spectrum signal is of more advantageous property. It can not only detect short-circuit metal transfer, but also more effectively detect droplet in free transfer mode than electrical signal. It can not only detect the droplet transfer in the CO〓 welding, but also can detect spray transfer in Ar welding with advantage over arc light signal. Especially, its outstanding capability of detecting steam spray transfer where other approaches fail, shows that are spectrum information has the utmost signal quality in metal droplet transfer detecting.

多种工艺条件下的对比实验表明，与电弧电信号及光强信号相比，电弧光谱信号具有更为优越的信号品质，其不仅可以检测熔滴短路过渡而且优于电信号可以有效地检测自由过渡；不仅可以检测活性气体保护条件下的熔滴过渡，而且优于光强信号可以检测惰性气体保护条件下的喷射过渡，特别是其可以实现熔滴射流过渡的检测，解决了这一用其它信号无法克服的难题，体现出电弧光谱信息在熔滴过渡研究中所独具的优越性。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。