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平特性
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  level characteristic
     In order to solve the problem of excessive welding splash in the conventional CO 2 gas protecting arc welding with level characteristic inverter,this paper puts forward the basic principle of CO 2 gas protecting arc welding using Insulating Grid Bipolar Transistor (IGBT) tube in the inverter, which utilizes constant current with external characteristics in cooperation with uniform wire feed.
     为了解决传统的平特性 CO2 气保焊电源焊接时飞溅大的缺点 ,该文提出了采用恒流外特性配合等速送丝 ,以实现IGBT管逆变式 CO2 气保焊的基本原理。
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     Teaching Potentialities on Constant Potential CO_2 Arc Welder
     平特性CO_2焊机的潜在教学效果
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     This algorithm uses the local flatness of surface, searches the local reconstruction for every point from the 3D Delaunay triangulation, and from the union of such locale reconstruction, carries out corresponding manifolds by deleting incompatible triangles.
     算法利用曲面的局平特性,从散乱点集三维Delaunay三角剖分的邻域结构中完成每个样点周围的局部拓扑重建,并从局部重建的并集中删除不相容的三角形,最终得到一个二维流形拓扑曲面集作为重建结果.
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     A main circuit of thyristor arc welding power source is designed and its working course is analyzed in this paper.
     设计了一种晶闸管整流式平特性弧焊电源主电路,分析了其工作过程。
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     For the purpose of solving the problem of bad bead shape (mostly be undercut)when SAW is used in high-speed welding, the technology of Pulsed voltageSubmerged Arc Welding with flat output characteristic power source and constantspeed wire feeder is put forward, this system sends out pulsed voltage.
     针对生产中提高焊速中埋弧焊成形变差(主要是咬边)的焊接问题,提出了在生产中采用平特性焊接电源匹配等速送丝系统的脉冲埋弧焊工艺,简要分析了产生咬边的原因,深入阐述了系统输出脉冲电压的焊接条件下,脉冲埋弧焊改善焊缝成形的原理。
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     Compared with AC manual arc welder, the CO 2 arc welder with constant voltage has more components such as high power rectifiers, electrical control circuits, gas flow and travel system, and wire feed mechanism. Besides CO 2 Welding it can also be used for MAG and MIG, as well as for teaching demonstration in surface processing such as electroplating, electro polishing, electrical arc spraying, electrophoretic painting etc. by means of constant potential source.
     平特性 CO2 焊机与交流手弧焊机相比 ,增加了大功率整流电路、电气控制线路、气路系统及送丝机构 ,除可进行 CO2 焊接外 ,还可进行 MAG、MIG焊 ,以及利用其平特性电源作电镀、电解抛光、电弧喷涂、电泳涂装等表面加工的教学演示 ,具有推广意义。
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  相似匹配句对
     Imaging Characteristics of the Flat-field Grating
     焦场光栅的成像特性
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     The study of characteristics of three-dimensional inlets with flat walls
     三维壁进气道的特性研究(英文)
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     PROPERTIES OF BIPOLARONS
     双极化子的特性
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     ENERGY CHARACTERISTICS OF R.L.C
     R.L.C的能量特性
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  flat characteristic
Pump characteristics curve influence system stability, stability of the flat characteristic is superior to the steep one.
      
Also, we can see how the group delay presents a flat characteristic inside the main lobes.
      
The gain starts loosing its flat characteristic below 5 Hz and above 150 kHz.
      
  level characteristic
The presence of a benzene ring contributed to decreased binding (relative to the level characteristic of aliphatic compounds).
      
During hibernation, lipid peroxidation proved to either decrease or remain at the level characteristic of waking animals.
      
Incubation of dON with cells led to the priming of new high-affinity binding sites and an increase of the binding constant to a level characteristic of high-affinity ligand-receptor interactions (109 M-1).
      
Studies with the binase mutants showed that a decrease in catalytic activity to 2.5% of the level characteristic of the wild-type enzyme deprives binase of its proapoptotic effect.
      
Conditioned medium, antioxidants, and reduced partial oxygen pressure enhanced their colony formation, but not to the level characteristic of the initial cells.
      
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From experimental investigation of a 4500 hp locomotive gas turbine, it is found that the shroud of stator blades has important influence on aerodynamic performance of axial-flow compressor (especially on the surge line). A preliminary analysis of the mechanism is given, and the method of "shroud treatment" is suggested. The major thermodynamie test results of this gas turbine are also presented. They include the power efficiency, mass flow rate and pressure ratio of the gas trubine varying with rotating speed...

From experimental investigation of a 4500 hp locomotive gas turbine, it is found that the shroud of stator blades has important influence on aerodynamic performance of axial-flow compressor (especially on the surge line). A preliminary analysis of the mechanism is given, and the method of "shroud treatment" is suggested. The major thermodynamie test results of this gas turbine are also presented. They include the power efficiency, mass flow rate and pressure ratio of the gas trubine varying with rotating speed and temperature ratio, and the characteristics of the compressor and turbine.

在4500马力机车燃气轮机的调试中发现静叶内围带对压气机性能、尤其是喘振边界有全面的严重影响.本文对其机理作了初步估计,并提出“围带处理”的设想.另外,还简要介绍了此机组的热力性能试验结果,包括机组的出力、效率、流量和压比随转速与温比的变化情况以及压气机与透平的特性.

After a brief introduction of the construction of the centripetal turbine developed for special application, the experimental results obtained in the Turbomachine Laboratory of SIME are presented.The test characteristic of the centripetal turbine, both with vaneless volute and with traditional guide vane row, are given in this paper. These performance curves indicate that the vaneless volute is comparable to the blade ring in efficiency, but the former has apparent advantage in reducing the weight and radial...

After a brief introduction of the construction of the centripetal turbine developed for special application, the experimental results obtained in the Turbomachine Laboratory of SIME are presented.The test characteristic of the centripetal turbine, both with vaneless volute and with traditional guide vane row, are given in this paper. These performance curves indicate that the vaneless volute is comparable to the blade ring in efficiency, but the former has apparent advantage in reducing the weight and radial dimension of the turbine (approximately up to 15-20% ).Furthermore, an investigation has been carried out to show the influence of the number of impeller blade on the turbine performance.

文中介绍了上海机械学院研制的低比转数特殊用途的向心透平的结构及其试验台。文中给出了试验所得的透平特性曲线。此外,在试验中比较了无叶导向器和喷咀环两种结构的性能,研究了动叶叶片数N_R对于透平性能的影响作用。

A new design of vertical windmill with double straight blades to overcome the difficulty in its self-starting is proposed. Another set of blades is mounted on the inner side of the single-bladed rotor. Expressions for the performance of this type of wind turbine are also discussed.

本文针对目前立轴风力透平不能自身启动的问题,提出了一种新的结构型式——带有副翼的双翼型立轴直叶片风力透平,文中研究和探讨了这种风力透平的特性表达式.

 
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