查询词典 arc-weld

The device comprises an arc discharge vacuum chamber; wherein, the arc discharge vacuum chamber is connected with a vacuum pump and is internally provided with a graphite cathode and a graphite anode which are connected with a DC supply. The device is characterized in that the graphite cathode and the graphite anode are respectively provided with an upper spherical crown shape graphite plate and a lower spherical crown shape graphite plate which are matched with each other and formed a spherical crown shape capacitor.

它包括电弧放电真空室，电弧放电真空室与真空泵相连接，电弧放电真空室内设有石墨阴极和石墨阳极，石墨阴极和石墨阳极与直流电源相连接，其特征在于在石墨阴极和石墨阳极上分别设相配合的上球冠形石墨板和下球冠形石墨板，上球冠形石墨板和下球冠形石墨板形成球冠型电容器。

In this model the fuse is simulated by a time variable nonlinear resistor combined with a switch, the nonlinear resistor represented the fore-arc resistor during fusing process, the switch is used to control the cut off time, and both of the above is calculated by the ANSYS. Compared the real assay curve and the simulation wave we found that: the calculated overvoltage amplitude value is accuracy with error less than 5%.But the wave is more or less different especially the part of the post-arc.

在电磁暂态计算程序——EMTP/ATP中，根据实际情况建立了熔断器开断试验电路的仿真模型，其中熔断器模型采用一个时间变量非线性电阻和开关的组合来代替，前者代表熔断器熔断过程的弧前电阻，后者控制开断时间，两者均由ANSYS计算得到。

Based on the developed variable polarity TIG welding power supply ,it establishes variable polarity TIG welding arc multi-information measuring and processing system by adopting memory oscilloscope,high speed video-recorder?spectrograph?welding arc dynamic analyzer and computer.

以研制的变极性TIG 焊接电源为实验平台，采用记忆示波器、高速摄像仪、光谱分析仪、焊接电弧动态分析仪，建立起变极性TIG焊接电弧多信息测试分析系统，同时采集焊接电流、电弧电压、电弧形态和电弧光谱等重要信息，并基于VisualC++语言开发的软件系统对采集的各种信息进行融合及分析。

The audio waveform is divided into several pieces according to the pitch period, and then the successive pieces with the same semitone arc grouped into one segment. The scaling operations arc performed on all these segments by the pre defined scaling factor.

首先利用基音分析技术将整个音频波形分割为若干基音周期，然后以半音为单位将连续的基音周期组织成音频段落，并在各个段落内部按指定比例进行缩放。

I use examples for Mayr arc model and Cassie arc model and adhibit the MATLAB platform to simulate.

我并对Mayr电弧模型和Cassie电弧模型进行了实例计算，并用MATLAB软件实现仿真。

In addition, the features of elemental geochemistry of all samples suggest that (1) the EarlyTriassic andesitic rocks, characterized by characteristic natures of island arc volcanics, likely erupted in the subduction setting; that (2) the generation of LateTriassic rhyolites with an affinity of Alike granite and synchronously main body granites in the Lincang batholith displaying similar geochemical features, is closely related with the postcollision or latecollision setting; that (3) although the LateTriassic basic rocks partly show island arc volcanics such as highAl contents and NbTa depletion, some of them possessing highMg contents and mostly having traceelement ratios similar to intraplate basalt, which indicates that they erupted in the postcollision rift environment.

元素地球化学特征表明，早三叠世火山岩具有典型的岛弧火山岩的特征，暗示其很可能形成于俯冲的构造环境；中三叠世晚期的流纹岩与临沧花岗岩基主体具有非常相似的地球化学特征，结合其流纹岩具有A型花岗岩属性，表明该区中三叠世火成岩形成于碰撞后的构造背景；而晚三叠世基性火山岩虽然在地球化学特征上显示出与岛弧火山岩相似的高铝和NbTa的亏损，但其中部分火山岩具有高镁和板内玄武岩的微量元素比值特征，说明这些火山岩可能形成于碰撞后裂谷环境。

The main principle of the DCcontactor:The electromagnetism coil switches on electricity thetitle iron to match with the iron heart on,the suction of theelectromagnetism system overcomes the counterforce of the springarouses the action of the contact, the main electric circuitconnected;The electromagnetism coil cuts the power the counterforceof the spring arouses the title iron from move to open, the headcontact breaks to open the output electricity arc give or get anelectric shock in drive to arc-extinct-chamber and made longer,thestrong cooling dissociates and put out,the main electric circuitcuts off.

接触器的主要原理：电磁线圈通电，衔铁和铁心吸合，电磁系统的吸力克服弹簧的反作用力带动动触头与静触头接触，主电路接通；电磁线圈断电，弹簧的反作用力带动衔铁和动触头弹开，触头断开产生的电弧在灭弧室中受到磁吹灭弧和电动力驱动被拉长，并强烈冷却去游离而熄灭，主电路切断。

To improve its reliability, it is necessary to investigate the effects of various factors on the arc moving process, as well as the dynamic change of the whole process from arcing to arc suppressing.

要提高低压电器产品的可靠性，就必须研究各种因素对电弧运动过程的影响，以及从燃弧到灭弧整个过程的动态变化。

On the one hand, the component method is introduced into flowchart design, which can not only enlarge the depth and the connotation of the flowchart, but also extend the traditional concepts of the flowchart. By combining the component method and the objectoriented method, it will be easy to illustrate the industry flow and meet with the future requirements of the industry control software. On the other hand, the trajectory concepts in plane moving, the method of using Bezier Curve to approach the 1/4 arc to implement the arc circumrotation, the method of using graphic elements' combination to extend the expression capability, and the method of combining the graphic elements'combination, three-dimensional graphic elements and bitmaps to realize the three-dimensional effects to express the industry flow more realistic are brought forward in this dissertation.

工控软件中最能够体现人机接口设计创造性的画面当属流程图，本文对流程图设计进行了深入研究，提出了一种工控软件流程图设计的新方法：一方面在流程图设计中引入部件化方法，扩展流程图的深度与内涵，延伸了流程图的传统概念与意义，将部件化技术与面向对象技术相结合，能够更好地实现对工艺过程的描述并适应工控软件的未来发展要求；另一方面对流程图中动画关联和三维化这些新兴领域进行了研究，提出了平移动画中的&轨道&概念，以实现图元的沿曲线平移，提出了在圆弧旋转动画中用Bezier曲线逼近〓圆弧的工程化方法，并用最小二乘法进行了验证和工程化参数的获取，实现了利用图元组合来扩展流程图的表达能力，采用了图元组合、三维图元和位图相结合的方法来实现逼真的三维效果，以使工控软件更加符合人机工学，更能形象地反映工艺流程。

Comparing with common side hybrid laser-arc welding, coaxially combined laser beam and arc can provide a symmetrical circular thermal source on the workpiece surface, which is convenient for 3-D welding.

与目前常用的旁轴激光-电弧复合焊相比，激光-电弧同轴复合可以在工件表面提供对称热源，焊接质量不受焊接方向影响而适于三维焊接。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。