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直流
相关语句
  dc
    Application of Magnetic Field in DC three-Pole Sputtering Apparatus to Deposition of TiC
    磁场在直流三极溅射沉积TiC中的应用
短句来源
    Study on AXQ-300 Ready-Pakaged Gasoline-powered DC Arc Welding Machine
    快装式AXQ—300型汽油机驱动直流弧焊机的研究
短句来源
    STUDY ON DIAMOND FILMS SYNTHESIZED BY DC PLASMA JET CVD
    直流等离子射流CVD法合成金刚石膜的研究
短句来源
    The control principle and software of the microcomputer controller used in DC impulse seam welding
    直流冲击波缝焊微机控制器的控制原理及软件系统
短句来源
    STUDY OF (Ti,Al)N FILMS DEPOSITED BY DC MAGNETRON SPUTTERING
    直流磁控溅射沉积(Ti,Al)N膜的研究
短句来源
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  direct current
    Development of The Transistor Arc Welding Inverter with Pulse and Direct Current
    脉冲—直流两用晶体管弧焊逆变器的研制
短句来源
    THE HOT SIMULATING TEST RESEARCH OF SINGLE ELECTRODE DIRECT CURRENT ARC FURNACE
    单电极直流电弧炉热态模拟试验研究
短句来源
    STUDY ON THE CURRENT DENSITY OF DIRECT CURRENT TIG WELDING ARC
    直流TIG电弧的电流密度研究
短句来源
    Effect of direct current steady-state magnetic field on the microstructure of directionally solidified Al-11.0%Si multiphase eutectic alloy is studied by applying the optimized self-making installation of Bridgman directional solidification.
    使用经改进后自制的Bridgman定向凝固装置,研究了直流稳恒磁场对多相合金Al-11.%Si定向凝固组织的影响。
短句来源
    Analtsis of the Temperature and Heating Stress Field for Level Direct Current Electromagnetism Continous Casting of Aluminum Bar
    铝圆坯水平直流电磁连铸温度场和热应力场分析
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  “直流”译为未确定词的双语例句
    STUDIES OF ARC STABILITY IN HIGH FREQUENCY PULSED TIG WELDING WITH RECTANGULAR WAVES
    矩形波直流脉冲TIG焊电弧稳定性的研究
短句来源
    Series 6RA27 D.C.Speed Regulating Device Applied on Percision Double Housing Planer
    6RA27系列直流调速装置在精密龙门刨床上的应用
短句来源
    Some Problems in TiN Coating Processes with DC-PCVD
    直流PCVD法沉积TiN超硬膜工艺中的几个问题
短句来源
    The Deposition of DC-PCVD Ti(C_XN(1-X)) Coatings and its Application
    直流PCVD Ti(C_XN_(1-X))硬质膜及其应用
短句来源
    ZX5 DC-Welder with Energy Saving and Automatic Protection
    新型ZX5节能自动保护直流焊机
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  dc
The structure and properties of the samples were investigated by XRD, Raman spectral techniques, and DC measurements and so on.
      
Results of the analysis reveal that crystals of the complex 1 are orthorhombic, space group Pbcn, a = 4.6370(2) nm, b = 0.7549(2) nm, c = 1.3888(4) nm, V = 4.861(2) nm3, Z = 8, M = 945.49, Dc = 2.58 g/cm3, μ = 2.625 cm-1, R = 0.063, and wR = 0.075.
      
Furthermore, it is clear that when carrier signal h(t)=0, closed-loop pulse-width modulation (PWM) DC-DC converters are not well posed, and when some condition is satisfied, the closed-loop PWM DC-DC converters with a P controller are well posed.
      
The brushless DC motor (BLDCM) with trapezoidal electromotive force (back-EMF) waveform is used widely.
      
Bifurcation and chaos in multi-parallel-connected current-mode controlled boost DC-DC converters
      
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  direct current
Direct current magnetic susceptibility measurement in the 2-300 K temperature range supports a high-spin ground state.
      
This paper analyzed the operating principles and power and torque characteristics of the wind turbine and the direct current motor (DC motor), and investigated the operating characteristics of the wind turbine compared to that of the DC motor.
      
Surfacing beads are prepared by a direct current tungsten inert gas arc nickel-aluminum (Ni-Al) powder surfacing process.
      
Using A-TIG welding with the modes of alternating current (AC), direct current electrode negative (DCEN) and direct current electrode positive (DCEP), respectively, the flux differently affects weld penetration when the polarity is different.
      
The structure, phase transition, oxygen ion diffusion and electrical conductivity were studied with X-ray diffraction (XRD), differential scanning calorimeter (DSC), direct current (dc) resistivity, and dielectric relaxation (DR) measurements.
      
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This paper introduces the researches on the variation of the electric breakdown

本文介绍了碱卤晶体电击穿场强与温度关系的研究。提及弗列里赫低温及高温晶体电击穿理论的概念。对许多国外作者的试验结果进行了综述。本文对NaCl及KBr晶体的电击穿场强与温度关系进行了试验研究,采用一面有球穴的试样,试样两面均以真空喷镀铝金属膜作电极,然后放入充有约30大气压氮气的金属压力罐中,进行击穿试验。直流下Nacl约在50℃时出现最大击穿场强,其数值约1.5×10~6 伏/厘米,而KBr则在120℃左右出现最大值,其数值约0.95×10~6伏/厘米。实验结果应用弗列里赫低温及高温晶体电击穿理论来解释。而对实验中晶体电强度在直流及交变电压下出现不一致的现象,则提出了晶体中存在两种空间电荷影响击穿的看法。

~~

本文介紹了管状工件在磁粉探伤中应考虑的主要影响因素。本文重点总結了纵向磁化的磁場强度分布及变化規律,为长工件分段探伤提供了基础。本文对纵向磁化規范作了进一步的探討,提出了极間距离因素,作为規范內容之一?允导噬兄傅夹砸庖濉?本文还概略地介紹了交直流周向磁化規范比較及灵敏度的分析。

A spectro-chemical method, for the analysis of trace of impurity elements (Pb, Bi, Sn, Sb, As) in one kind of Ni-alloys, was developed, with D.C. arc powder excitation following H_2S pre-separation.Owing to the needs of long periods of operation and large amount of reagents, the use of A. R. grade reagents led to a considerable blank value. After using purified reagents, the blanks (for Pb, Sn) were reduced to a μ-gram range.During the arcing of the specimens, the evaporation of arsenic was found to be very...

A spectro-chemical method, for the analysis of trace of impurity elements (Pb, Bi, Sn, Sb, As) in one kind of Ni-alloys, was developed, with D.C. arc powder excitation following H_2S pre-separation.Owing to the needs of long periods of operation and large amount of reagents, the use of A. R. grade reagents led to a considerable blank value. After using purified reagents, the blanks (for Pb, Sn) were reduced to a μ-gram range.During the arcing of the specimens, the evaporation of arsenic was found to be very imcomplete. The addition of P_2O_5 accelerated its evaporation very obviously. While the sample being utilized efficiently, the sensitivity of arsenic increased 4—5 times. It was noticed that at the position of the line As 2349 (?), the band spectra of carbon ignited in air was very obvious and a correction must be made.Results of experiments showed that standard samples could be prepared by the H_2S treatment of pure standard solutions. The usual blank correction of the matrix could thus be avoided.An analytical procedure was suggested and the results of three specimens were listed. These data showed teat the lower limits of analysis of this method were: Pb:0.0001%, Sn, Sb:0.0002%, As:0.0003% and Bi:0.00002%.

采用硫化氢分离、深孔电极直流电弧粉末法进行了一种镍基合金中微量有害杂质(Pb,Bi,Sn,Sb,As)的分析。由于操作流程较长,试剂用量亦较大,即使采用分析纯级试剂实验空白(主要为Pb,Sn,As)也很高。为此系统地分析了空白的来源,并寻找了降低的办法,最后使Pb,Sn的空自值降低至1—2微克。满足了分析的要求。试样中,As的蒸发很不完全。加入P_2O_5后,使As的蒸发大大加速。由于有效地利用了样品,因而使As的灵敏度提高了4—5倍。实验中发现在As 2349埃处有碳电极在空气中燃弧所产生的带状光谱。系统实验的结果表明,可以用经过硫化氢沉淀后的纯溶液来配制标准样品,避免了采用一般增量法制定定标曲线,保证了结果的准确度。通过系统实验,确定了操作条件。对于三个实际试样进行了多次分析。结果说明,本法的分析下限分别为:Pb:0.0001%,Sn,Sb:0.0002%,As:0.0003%,Bi:0.00002%。

 
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