查询词典 arc welding

The experiment of the auxiliary heated arc plasma generator shows that thekey arc root has contraction under the condition of having magnetic field when thekey arc root is at the edge of the cathode surface.

在辅助加热电弧等离子体发生器的实验中看到：在有外磁场的情况下，主弧弧根在阴极边缘时，弧根有收缩的迹象，而当主弧弧根在阴极中心附近时，观察不到明显的弧根收缩迹象，并拍摄到有双弧柱的图片；当关掉磁场和弧电流〓时，主弧在阴极和阳极之间稳定的燃烧，主弧弧根稳定在阴极中心附近的一点上，而且弧根没有收缩的迹象，主弧弧根亮区的直径约为6.8毫米，与弧柱段的亮区直径相差无几；因而从实验结果分析可以看出，阴极表面温度的升高，能使主弧弧根直径增大：另一方面，由于主弧弧根直径的增大(即也意味着主弧弧根截面积的增大)，因而使电弧通过主弧弧根传入阴极表面的有效比热流降低，从而减少了阴极烧损。

This system which can do correlation analysis among vacuum arc imagine, light intensity spectrum density, electron density, vacuum arc voltage, vacuum arc current has a series of properties like synchronous exposure, high sampling speed, good quality with comparatively low price, strong functional software, friendly user's interface and so on.

本课题研制成功了真空电弧动态图象高速微机采集系统，该系统具有同步曝光、采样速度快，性能价格比高，软件功能强，用户界面好等特点，该系统可对瞬时的真空电弧形态，光强密度，电子密度，电弧电压，电弧电流进行相关分析。

On the basis of analyzing running condition arc furnace system and researching characteristics of dust remover of arc furnace, taking the application of Harsvert-A in dust removing transformation of steelworks as an example, successful application of high-voltage frequency conversion technology on dust removing system of arc furnace in steelworks is introduced.

在分析了电弧炉设备的运行现状和研究了电弧炉除尘系统特点的基础上，通过Harsvert-A型高压变频器在某炼钢厂除尘系统改造中的应用实例，介绍了高压变频技术在炼钢厂电弧炉除尘系统中的成功应用。

One of, RHDHG series arc protection and created a domestic light, the low-voltage electric arc light protection precedent, to fill the domestic electric arc light at the time unable to protect the power bus of the blank, is now at more than 100 domestic substations, power plants, petrochemical and other high institutions to use more than 400 Units, the protection of the principle of new, faster removal of time to failure, fault location accuracy, user satisfaction high.

其中，RHDHG系列电弧光保护开创了国内中、低压电弧光保护的先河，填补了国内在电弧光发生时无法保护电力母线的空白，目前已在国内的100多个变电站、电厂、石化等企事业单位使用400多台，保护原理新颖，切除故障时间快，故障定位准确，用户满意度高。

Of the five stages deformation, the exact ages of the (2) and (3) were determined by 40Ar/39Ar method as 290 and 259 Ma respectively.2. New results on the metamorphic belts and associated metamorphism of the Xiaopu metamorphic rocksBased on detailed microtextural observations and occurrence of typical metamorphic minerals, five metamorphic belts in the Xiaopu metamorphic rocks are identified. From the north to the south, they are biotite belt, garnet belt, staurolite belt, andalusite belt, and sillimanite belt. I suggested that the metamorphic belts occurred in the Xiaopu area belongs to the high temperature/low pressure series, may have resulted from the later Permian crust extension at ca. 290 Ma.3. I suggest that there may have been a Carboniferous backarc basin along the southern slope of the Harlik Mountain.Detrital Zircon SHRIMP U-Pb dating indicated that the sedimentary age of the Julideneng formation lithic sandstone must be later than late Devonian, most likely is Carboniferous rather than previously thought Precambrian. Analyses on its geologic setting, location of provenance, and sedimentary environment suggest the Carboniferous strata may form in a lagged backarc basin bounded by backarc uplifts.5. Reconstruction of the post-Paleozoic tectonic evolution history of the Harlik MountainThe tectonic evolution of Harlik mountains since the Paleozoic were reconstructed as followings:(1) arc-affinity magmative activities occurred during the middle-Ordovician to early-Silurian;(2) the middle-Silurian to late-Devonian was a back-arc uplift stage;(3) back-arc extension featured the Carboniferous period;(4) post-collisional extension and/then compression during Permian;(5) at the Mesozoic, differential uplift developed; and (6) the late Cenozoic is the intra-continental re-orogen stage.6. Primary estimation of the crust shortening is madeThe folded pre-Mesozoic strata were used to estimate crust shortening along the Harliknanshankou-Koumenzi, Shichengzi-Baishitou, and Qincheng-Xiaopu sections. Their shortening ratios are 16.2%, 19.8%, and 20.1% respectively corresponding crust shortening are 4.3, 9, and 11.3 km.

根据Ar-Ar热年代学研究，精确测定了早二叠世伸展变形和晚二叠世挤压变形的峰期时代分别为290Ma和259Ma.2、提出了关于哈尔里克山南麓小铺一带变质带和变质作用的新认识根据显微观察资料和特征变质矿物的出现，把小铺一带的变质岩由SW向NE方向依次划分为黑云母带、石榴石带、十字石带、红柱石带和矽线石带等变质带；初步确定该区的变质作用属于中温-低压型，变质作用发生的时代为290Ma左右，是该区早二叠世地壳伸展的产物。3、首次提出哈尔里克山南麓在石炭纪可能发育弧后盆地的新观点根据哈尔里克山南麓原&居里得能组&岩屑砂岩的碎屑锆石SHRIMP U-Pb定年，确认这套地层的沉积不早于晚泥盆世，很可能是石炭纪，而不是前人所说的前寒武纪；结合对其区域地质背景、源区位置和沉积环境分析，推测该区石炭纪可能为滞后弧后盆地和弧后隆起区构造背景。4、进一步证明哈尔里克山不发育与岛弧演化相关的泥盆纪岩浆活动根据对代表性闪长岩和花岗岩的锆石SHRIMP年代学研究获得的新资料，结合该区已有相关资料的综合研究，确定哈尔里克山岩浆岩分别形成于奥陶纪-志留纪和石炭纪晚期-二叠纪，不存在泥盆纪的岩浆岩，进而认为该区泥盆纪不属于岛弧环境。5、重建了哈尔里克山古生代以来的地质演化过程根据区域资料以及本次研究所获得的资料，把哈尔里克山古生代以来的构造演化划分中奥陶世-早志留世为岛弧、中志留世-晚泥盆世为弧后区、石炭纪弧后伸展、二叠纪为后碰撞伸展与挤压、中生代差异隆升和晚新生代陆内再造山过程等构造阶段。6、初步估算了哈尔里克山地壳缩短率和缩短量根据前中生代地层褶皱估算的哈尔里克山南山口-口门子、石城子-白石头和沁城-小铺三条剖面的地壳缩短率分别为16.2%、19.8%和20.1%，相应的地壳缩短量分别为4.3km、9km和11.3km。

After extraction of the arc region from regions, the seed for an arc is obtained. By traversals for the graph, the seed arc grows by constrains for the same circle.

圆弧及圆的识别先从邻接图顶点中抽取圆弧域，作为种子圆弧，然后从此出发遍历图，按照同圆来建立路径，进行整弧和整圆增长，最终获得圆弧和圆的几何表达。

In this paper, used the 2-D optical fiber measurement system to investigate the whole process of arc movement, and the influence of the arc movement to the post current zero state of arc.

本文借助光纤测试系统从微观上研究电弧的运动全过程，分析电弧运动形态对电流过零后电弧状态的影响。

All methods of secondary arc extinction are directed toward reducing the magnitude of secondary arc current and recovery voltage, which in turn will reduce the extinction time of the arc and assure successful single-pole autoreclosure .

所有的用于熄灭潜供电弧的方法均可归结到降低潜供电流和恢复电压的幅值，进而减少电弧燃烧时间，保证单相自动重合闸的成功。

The lead-in voltage and out-of-line voltage of switchbox are detected and converted into frequency signal. The arc voltage signal can be obtained by measuring the two signals. The arc voltage signal and arc light intensity signal are sent to the advanced single-chip microcom puter, PIC16F877, to do synthetic analysis – judgment.

提取配电箱的进线电压和出线电压，分别转换成频率信号进行比较，获得电弧电压信号，并将其和弧光信号一起送入性能先进的PIC16F877单片机，做综合分析判断。

The above-described methods can be extended to other power source CO〓 welding machine and other welding methods.

但存在飞溅较大、成形较差的缺点，从而制约了它的进一步推广和应用。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。