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痕量
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  trace
    A STUDY AND APPLICATION OF 2,2,4-TRI- METHYLPENTYLDIOL-1,3 IN EXTRACTION OF TRACE AMOUNTS OF BORON
    2,2,4-三甲基戊二醇-1,3萃取痕量硼的研究及其应用
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    The Determination of Trace Uranium by TOPO Solvent Extraction-Solid Fluorophotometry
    TOPO萃取-固体荧光法测定痕量
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    The Determination of Trace Uranium in the ADU and AUC Processing by Laser Fluorescence
    激光荧光法测定ADU及AUC化工工艺过程中痕量
短句来源
    Study of Carrier Extraction Spectrophotometry for Determination of Trace Zinc in Alluminium Alloys
    载体萃取光度法测定铝合金中痕量锌的研究
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    The Review of Methods on Separation and Enrichment for Trace Boron
    痕量硼分离与富集方法的评述
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  “痕量”译为未确定词的双语例句
    The results indicate that the precipitates of GH742y alloy are γ′,Nb(C,N) and VC.
    结果表明:铸态下,GH742y合金中存在γ′、Nb(C,N)及VC(痕量)相。
短句来源
    FAAS successive determination of lead and copper in aluminium and aluminium alloys
    火焰原子吸收光谱法连续测定铝及铝合金中痕量铅、铜
短句来源
    The dynamical processes of the nucleation and propagation of stress corrosion cracking(SCC) of four low alloy steels with a wide range of tensile strengths in aqueous media with various polarization conditions, in a K_2Cr_2O_7 inhibitor solution and in some organic solvent such as acetone and alcohol were traced with an optical microscope.
    用抛光的恒位移试样跟踪观察了具有广泛拉伸强度范围的四种低合金钢在各种水溶液中(高纯水、阳极极化和阴极极化下的水溶液,0.1NK_2Cr_2O_7水溶液)以及含痕量水的有机溶剂中(无水酒精,丙酮等)应力腐蚀裂纹产生和扩展的动态过程。
短句来源
    Theelectrode can effectively concentrate uranyl ion from the solution(0.25M ofKNO_3 at pH=3.4)in a condition of open circuit.
    这种电极,在开路状况下能有效地从溶液(0.25M,pH为3.4的 KNO_3)中浓集痕量铀酰离子。
短句来源
    The wavelength λmax at the absorption peak of the complex is 540nm, with a molar absorptivity of 1.34×105L/mol·cm and △λ> 80nm.
    络合物的蜂值吸收波长为540mm,摩尔吸光率为1.34×10~5L·mol~(-1)·cm~(-1)本文制定了一个测定钢和铁中痕量锡的直接分光光度法,不需任何的分离过程。
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  trace
Using related sequences of Lucas numbers, other 3-manifolds are constructed, their geometric structures determined, and a curious relationship between the homology and the invariant trace-field examined.
      
Trace Inequalities, Maximal Inequalities, and Weighted Fourier Transform Estimates
      
We show that the trace of an indefinitely oscillating function on a subspace of ?d is not always indefinitely oscillating.
      
In the periodic case, the number of oscillations of the trace depends on the regularity of the function.
      
As applications, we obtain characterizations of the Besov and Triebel-Lizorkin spaces on Lipschitz curves, and the trace theorem on Γ of the Besov spaces onR2.
      
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The dynamical processes of the nucleation and propagation of stress corrosion cracking(SCC) of four low alloy steels with a wide range of tensile strengths in aqueous media with various polarization conditions, in a K_2Cr_2O_7 inhibitor solution and in some organic solvent such as acetone and alcohol were traced with an optical microscope.Results show that if the tensile strength of the steel is higher than a critical value, which is different for different polarization conditions, and if K_1>K_(ISCC), the delayed...

The dynamical processes of the nucleation and propagation of stress corrosion cracking(SCC) of four low alloy steels with a wide range of tensile strengths in aqueous media with various polarization conditions, in a K_2Cr_2O_7 inhibitor solution and in some organic solvent such as acetone and alcohol were traced with an optical microscope.Results show that if the tensile strength of the steel is higher than a critical value, which is different for different polarization conditions, and if K_1>K_(ISCC), the delayed plastic deformation occurs in all environments used, i.e.,the plastic zone in front of a loaded crack tip is enlarged with time. The nucleation and propagation of SCC will follow when this delayed plastic deformation develops to a critical condition. Neither anodic and cathodic polarization nor the addition of inhibitor can change the feature of the delayed plasticity and the nucleatioa and propagation of SCC in aqueous media. In all the environments used, K_(ISCC) increases and da/dt decreases with decreasing strength of the steel. Anodic polarization and the addition of the inhibitor make K_(ISCC) increase and da/dt decrease, while the effect of cathodic polarization is just the other way.

用抛光的恒位移试样跟踪观察了具有广泛拉伸强度范围的四种低合金钢在各种水溶液中(高纯水、阳极极化和阴极极化下的水溶液,0.1NK_2Cr_2O_7水溶液)以及含痕量水的有机溶剂中(无水酒精,丙酮等)应力腐蚀裂纹产生和扩展的动态过程。结果表明,当钢的强度和K_1大于临界值后,在所用的各种水溶液中都能产生氢致滞后塑性变形,即加载裂纹前端的塑性区及其变形量随时间而逐渐增大。当这个氢致滞后塑性变形发展到临界状态时,就会导致应力腐蚀裂纹的形核和扩展。无论是阳极极化、阴极极化还是加缓蚀剂均不改变这类滞后塑性变形的特征,也不改变滞后塑性变形和应力腐蚀裂纹的相互关系。

By means of electrochemical and trace amount analysis techniques the dezincification behavior of α+β biphase brass in a deaerated acidified solution of sodium chloride under condition of continuous introduction of Cu~+ into solution was studied. The changes of the indicator electrode potential with time could provide information of the copper deposition on the brass surface. Similar results were obtained by trace amount analysis method. Experimental results show that corrosion of biphase brass under experimental...

By means of electrochemical and trace amount analysis techniques the dezincification behavior of α+β biphase brass in a deaerated acidified solution of sodium chloride under condition of continuous introduction of Cu~+ into solution was studied. The changes of the indicator electrode potential with time could provide information of the copper deposition on the brass surface. Similar results were obtained by trace amount analysis method. Experimental results show that corrosion of biphase brass under experimental conditions follows the dissolution-redeposition mechanism. It was shown that the reduction of Cu~+ was compensated by the dissolution of Zinc from brass. Thus, serious dezincification took place on the surface of biphase brass. Experimental results indicated that the limiting concentration of Cu~+ which caused copper redeposition was below 10~(-4) M. Apparent rate constant of copper redeposition was 3.7×10~(-4) sec~(-1). A model was suggested and compared with experimental results.

本文采用电化学和痕量分析方法,研究了在连续引进铜离子的去氧酸性氯化钠溶液中α+β两相黄铜的脱锌行为。溶液分析得到的铜、锌离子量随时间的变化与指示铜电极电位随时间的变化,都可以提供黄铜表面上铜沉积的信息。实验结果证明,两相黄铜在实验条件下腐蚀时发生显著的铜再沉积现象,其共轭反应为锌的溶解,故此造成严重脱锌。实验测得,引起铜再沉积的铜离子浓度下限低于10~(-4)M,铜再沉积的表观速度常数为3.7×10~(-4)sec~(-1)。文中还提出了实验体系中的反应模型,并与实验结果进行了比较。

The Electrochemistry Division of the Royal Australian Chemical Institute held the 6th Australian Electrochemistry Conference on February 19 through 24, 1984. in Deakin University, Geelong City, Victoria. More than 160 delegates from 16 countries attended this conference. So it might be said to be an international meeting of electrochemistry scientists. At least 80 papers on a wide range of topics are presented. Here is only a brief introducton to some most interesting topics It includes: (1) electrochemistry-...

The Electrochemistry Division of the Royal Australian Chemical Institute held the 6th Australian Electrochemistry Conference on February 19 through 24, 1984. in Deakin University, Geelong City, Victoria. More than 160 delegates from 16 countries attended this conference. So it might be said to be an international meeting of electrochemistry scientists. At least 80 papers on a wide range of topics are presented. Here is only a brief introducton to some most interesting topics It includes: (1) electrochemistry- the interfacing seience, (2) trace electrnanalysis, ( 3) electrometallurgy. (4) semiconductor and photosletrochemistry , (5) leaching electrochemistry. (6) microprocessor used in electrochemistry, and (7) electrochemical power sources.The descriptions of the topics mentioned above have reflected the development in some aspects of electrochemistry at the world level

第六届澳大利亚电化学会议,于1984年2月19——24日在该国吉郎市第肯大学举行.出席会议的代表有160多名,来自16个国家,可以认为是一次国际性的电化学会议.提交的论文有80多篇,内容范围很广。本文只对一些感兴趣的问题作一扼要介绍,这些问题包括:1.电化学——一门界面科学;2.痕量电化分析;3.电化冶金;4.半导体及光电化学;5.化学教育;6.微处理机在电化学中的应用;7.电化学电源.会议对这些问题的研究,反映了当前电化学中一些课题的发展动向及世界水平.

 
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